Surface mount circuit board for ultra-small soldering leg

Abstract

The utility model relates to circuit board mounting technical field, specifically is a kind of for super small solder leg's mounting circuit board, including rack, four columns are fixedly connected on the rack, four steel nets are installed on the four columns, the bottom four corners of the steel net are fixedly connected with four insertion blocks, slot is equipped on the column, the insertion block is inserted with slot, and one clamping strip is slidably connected on the column of same side, clamping slot is equipped on the insertion block, the clamping strip is engaged with clamping slot, fixed block is fixedly connected on the clamping strip, pull spring is fixedly connected between the fixed block and column, the adjacent end of two the clamping strip of same side each fixedly connected with a drive bar, slope is equipped on the drive bar, pressure frame is slidably connected on the drive bar, the top end of the drive bar is fixedly connected with anti-drop block;The steel net of tin paste printing machine can be quickly mounted and disassembled, and the mounting and disassembling efficiency of the steel net is improved.

Description

Technical Field

[0001] This utility model relates to a mounting circuit board, specifically a mounting circuit board for ultra-small solder feet, and belongs to the field of circuit board mounting technology. Background Technology

[0002] In the field of circuit board mounting technology, as electronic products continue to develop towards miniaturization and micro-miniaturization, electronic components with ultra-small solder pads are being used more and more widely; this trend has placed higher demands on the precision and efficiency of circuit board mounting.

[0003] The stencil installation method of traditional solder paste printers is relatively complicated, usually requiring the use of multiple bolts or clamps for fixation. In actual production, when the stencil is frequently changed to adapt to the production needs of different circuit boards, this installation method consumes a lot of time and manpower. Operators need to tighten or loosen the bolts one by one, which is not only cumbersome, but also prone to insecure installation or positional deviation, which seriously affects production efficiency and may also lead to unstable printing quality and increase the defect rate. Utility Model Content

[0004] The purpose of this invention is to provide a mounting circuit board for ultra-small solder feet to solve the above problems, which can quickly install and remove the stencil of the solder paste printer, thereby improving the installation and removal efficiency of the stencil.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a mounting circuit board for ultra-small solder feet, comprising a frame, four columns fixedly connected to the frame, a steel mesh mounted on the four columns, an installation structure provided on the steel mesh, the installation structure including insert blocks, four insert blocks fixedly connected to the four corners of the bottom end of the steel mesh, slots provided on the columns, the insert blocks being inserted into the slots, a locking strip slidably connected to each of the two columns on the same side, a locking groove provided on the insert block, the locking strip engaging with the locking groove, a fixing block fixedly connected to the locking strip, a tension spring fixedly connected between the fixing block and the column, a driving strip fixedly connected to each of the adjacent ends of the two locking strips on the same side, a bevel provided on the driving strip, a pressure frame slidably connected to the driving strip, and an anti-detachment block fixedly connected to the top end of the driving strip.

[0006] Preferably, the bottom cross-section of the insert block is trapezoidal, the end cross-section of the clip is trapezoidal, a T-shaped guide rod is fixedly connected to the column, and the fixing block is slidably connected to the guide rod.

[0007] Preferably, the frame is provided with a positioning structure, the positioning structure includes a mounting bracket, the mounting bracket is fixedly connected to the frame, a first screw is rotatably connected between the mounting bracket and the frame, a first motor is fixedly connected to the mounting bracket, the output end of the first motor is threadedly connected to the first screw, a lifting platform is threadedly connected to the first screw, and the lifting platform is slidably connected to the frame.

[0008] Preferably, two first fixing bars are fixedly connected to the lifting platform, and a second screw is rotatably connected between the two first fixing bars. A second motor is fixedly connected to one of the first fixing bars, and the output end of the second motor is fixedly connected to the second screw. Two first threaded seats are threadedly connected to the second screw, and a slide is fixedly connected above the two first threaded seats.

[0009] Preferably, the bottom end of the slide table is fixedly connected to two first sliding sleeves, and the lifting platform is fixedly connected to two first slide rails, with the first sliding sleeves and the first slide rails being slidably connected.

[0010] Preferably, two second fixing bars are fixedly connected to the slide, and a third screw is rotatably connected between the two second fixing bars. A third motor is fixedly connected to one of the second fixing bars, and the output end of the third motor is fixedly connected to the third screw. Two second threaded seats are threadedly connected to the third screw, and a mounting platform is fixedly connected to the two second threaded seats. A base plate is fixedly connected to the mounting platform by a clamping structure.

[0011] Preferably, the bottom end of the mounting platform is fixedly connected to two second sliding sleeves, and the sliding platform is fixedly connected to two second slide rails. The second sliding sleeves are slidably connected to the second slide rails, and the sliding platform is perpendicular to the direction of movement of the mounting platform.

[0012] Preferably, the clamping structure includes four mounting blocks, which are fixedly connected to the mounting platform. A fourth screw is rotatably connected between two of the mounting blocks. The threads at both ends of the fourth screw are in opposite directions. Two clamping strips are symmetrically threaded onto the fourth screw. The clamping strips are slidably connected to the mounting platform, and a base plate is clamped between the two clamping strips. A fourth motor is fixedly connected to the mounting block, and the output end of the fourth motor is fixedly connected to the fourth screw.

[0013] Preferably, a guide shaft is fixedly connected between the other two mounting blocks, the clamping strip is slidably connected to the guide shaft, a rubber pad is fixedly connected to the clamping strip, and the rubber pad abuts against the substrate.

[0014] Preferably, the frame is provided with a brushing structure, the brushing structure includes a fifth motor, the fifth motor is fixedly connected to the frame, a fifth screw is rotatably connected to the frame, the output end of the fifth motor is fixedly connected to the fifth screw, a crossbeam is threadedly connected to the fifth screw, a guide column is fixedly connected to the frame, the crossbeam is slidably connected to the guide column, a hydraulic cylinder is fixedly connected to the crossbeam, and a scraper is fixedly connected to the telescopic end of the hydraulic cylinder, the scraper abutting against the steel mesh.

[0015] The beneficial effects of this utility model are as follows: four columns are fixedly connected to the frame, and a steel mesh is installed on the four columns. Four insert blocks are fixedly connected to the four corners of the bottom end of the steel mesh. The columns are provided with slots, and the insert blocks are inserted into the slots. A locking strip is slidably connected to each of the two columns on the same side. The insert blocks are provided with slots, and the locking strips are engaged with the slots. A fixing block is fixedly connected to the locking strip, and a tension spring is fixedly connected between the fixing block and the column. A driving strip is fixedly connected to each adjacent end of the two locking strips on the same side. The driving strip is provided with an inclined surface, and a pressure frame is slidably connected to the driving strip. An anti-detachment block is fixedly connected to the top of the driving strip. This allows for quick installation and disassembly of the steel mesh for the solder paste printing machine, improving the efficiency of steel mesh installation and disassembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 for Figure 1 The diagram shown is an enlarged view of the structure of part A.

[0018] Figure 3 This is a schematic diagram of the connection structure between the mounting bracket and the first motor of this utility model;

[0019] Figure 4 for Figure 3 The diagram shown is an enlarged view of the structure of section B.

[0020] Figure 5 This is a schematic diagram of the connection structure between the frame and the positioning structure of this utility model;

[0021] Figure 6 for Figure 5 The diagram shows an enlarged view of section C.

[0022] In the diagram: 1. Frame; 2. Column; 3. Mounting structure; 301. Insert block; 302. Slot; 303. Locking strip; 304. Locking groove; 305. Fixing block; 306. Guide rod; 307. Tension spring; 308. Drive bar; 309. Pressure frame; 310. Anti-detachment block; 4. Steel mesh; 5. Positioning structure; 501. Mounting bracket; 502. First motor; 503. First screw; 504. Lifting platform; 505. First fixing bar; 506. Second screw; 507. Second motor; 508. First threaded seat; 509. Slide table; 510. First 511. Sliding sleeve; 512. First slide rail; 513. Second fixing bar; 514. Third screw; 515. Third motor; 516. Second threaded seat; 517. Mounting platform; 518. Second sliding sleeve; 519. Second slide rail; 6. Clamping structure; 601. Mounting block; 602. Fourth screw; 603. Clamping bar; 604. Guide shaft; 605. Rubber pad; 606. Fourth motor; 7. Base plate; 8. Brushing structure; 801. Fifth motor; 802. Fifth screw; 803. Crossbeam; 804. Guide post; 805. Hydraulic cylinder; 806. Scraper. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-6 As shown, a mounting circuit board for ultra-small solder feet includes a frame 1, on which four columns 2 are fixedly connected. A stencil 4 is mounted on each of the four columns 2. The stencil 4 has a mounting structure 3, which includes insert blocks 301. Four insert blocks 301 are fixedly connected to the four corners of the bottom of the stencil 4. Slots 302 are provided on each of the columns 2, and the insert blocks 301 are inserted into the slots 302. A retaining strip 303 is slidably connected to each of the two columns 2 on the same side. The insert blocks 301 have retaining grooves 304. The locking strip 303 engages with the locking slot 304. A fixing block 305 is fixedly connected to the locking strip 303. A tension spring 307 is fixedly connected between the fixing block 305 and the column 2. A driving strip 308 is fixedly connected to each adjacent end of the two locking strips 303 on the same side. The driving strip 308 has an inclined surface. A pressure frame 309 is slidably connected to the driving strip 308. An anti-detachment block 310 is fixedly connected to the top of the driving strip 308. The stencil 4 of the solder paste printer can be quickly installed and disassembled through the installation structure 3, which improves the installation and disassembly efficiency of the stencil 4.

[0025] As a technical optimization of this utility model, the bottom cross-section of the insert block 301 is trapezoidal, and the end cross-section of the locking strip 303 is trapezoidal, which facilitates the insertion of the insert block 301 into the slot 302 and facilitates the engagement of the locking strip 303 with the slot 304. A guide rod 306 with a T-shaped cross-section is fixedly connected to the column 2, and the fixing block 305 is slidably connected to the guide rod 306; this prevents the locking strip 303 from slipping off the column 2 and improves the stability of the movement of the locking strip 303.

[0026] As a technical optimization of this utility model, the frame 1 is provided with a positioning structure 5, the positioning structure 5 including a mounting bracket 501, the mounting bracket 501 is fixedly connected to the frame 1, a first screw 503 is rotatably connected between the mounting bracket 501 and the frame 1, a first motor 502 is fixedly connected to the mounting bracket 501, the output end of the first motor 502 is threadedly connected to the first screw 503, a lifting platform 504 is threadedly connected to the first screw 503, and the lifting platform 504 is slidably connected to the frame 1; the lifting... Two first fixing bars 505 are fixedly connected to the lowering platform 504. A second screw 506 is rotatably connected between the two first fixing bars 505. A second motor 507 is fixedly connected to one of the first fixing bars 505. The output end of the second motor 507 is fixedly connected to the second screw 506. Two first threaded seats 508 are threadedly connected to the second screw 506. A slide table 509 is fixedly connected above the two first threaded seats 508. Two first sliding sleeves 510 are fixedly connected to the bottom end of the slide table 509. Two first slide rails 511 are fixedly connected to the lifting platform 504, and the first sliding sleeve 510 is slidably connected to the first slide rails 511. Two second fixing bars 512 are fixedly connected to the slide platform 509, and a third screw 513 is rotatably connected between the two second fixing bars 512. A third motor 514 is fixedly connected to one of the second fixing bars 512, and the output end of the third motor 514 is fixedly connected to the third screw 513. Two second threaded seats 515 are threadedly connected to the third screw 513. A mounting platform 516 is fixedly connected to the base 515, and a substrate 7 is fixedly connected to the mounting platform 516 via a clamping structure 6. Two second sliding sleeves 517 are fixedly connected to the bottom end of the mounting platform 516, and two second slide rails 518 are fixedly connected to the slide table 509. The second sliding sleeves 517 and the second slide rails 518 are slidably connected. The slide table 509 is perpendicular to the moving direction of the mounting platform 516. The substrate 7 is moved by the positioning structure 5, thereby accurately positioning the substrate 7 so that the solder paste printing points on the substrate 7 can be quickly aligned with the holes on the stencil 4.

[0027] As a technical optimization of this utility model, the clamping structure 6 includes four mounting blocks 601. Four mounting blocks 601 are fixedly connected to the mounting platform 516. A fourth screw 602 is rotatably connected between two of the mounting blocks 601. The threads at both ends of the fourth screw 602 are opposite in direction. Two clamping strips 603 are symmetrically threaded onto the fourth screw 602. The clamping strips 603 are slidably connected to the mounting platform 516, and a substrate 7 is clamped between the two clamping strips 603. A fourth motor 606 is fixedly connected to the mounting block 601, and the output end of the fourth motor 606 is fixedly connected to the fourth screw 602. A guide shaft 604 is fixedly connected between the other two mounting blocks 601. The clamping strips 603 are slidably connected to the guide shaft 604, and a rubber pad 605 is fixedly connected to the clamping strips 603, contacting the substrate 7. By clamping the substrate 7 with the clamping structure 6, the stability of the substrate 7 during solder paste printing is improved.

[0028] As a technical optimization of this utility model, the frame 1 is provided with a brushing structure 8, which includes a fifth motor 801. The fifth motor 801 is fixedly connected to the frame 1, and a fifth screw 802 is rotatably connected to the frame 1. The output end of the fifth motor 801 is fixedly connected to the fifth screw 802. A crossbeam 803 is threadedly connected to the fifth screw 802. A guide post 804 is fixedly connected to the frame 1. The crossbeam 803 is slidably connected to the guide post 804. A hydraulic cylinder 805 is fixedly connected to the crossbeam 803. A scraper 806 is fixedly connected to the telescopic end of the hydraulic cylinder 805. The scraper 806 abuts against the steel mesh 4. Solder paste is applied by the brushing structure 8, so that the solder paste is evenly brushed on the corresponding positions on the substrate 7.

[0029] When using this utility model, firstly, insert the four corner blocks 301 at the bottom of the steel mesh 4 into the slots 302 on the column 2. At this time, under the tension of the tension spring 307, the trapezoidal structure at the end of the clip 303 engages with the slot 304 on the insert block 301, completing the initial installation of the steel mesh 4. During the installation process, the trapezoidal structure design of the bottom end of the insert block 301 and the end of the clip 303 facilitates the insertion and engagement of the two. If it is necessary to disassemble the steel mesh 4, slide the pressure frame 309 downward. The pressure frame 309 slides along the inclined surface of the drive bar 308, so that the two clips 303 come closer to each other and disengage from the engagement state with the slot 304, and the steel mesh 4 can be taken out. The anti-disengagement block 310 at the top of the drive bar 308 can prevent the pressure frame 309 from slipping.

[0030] When clamping the substrate 7, the substrate 7 is placed on the mounting stage 516, and the fourth motor 606 is started. The fourth motor 606 drives the fourth screw 602 to rotate. Since the threads at both ends of the fourth screw 602 are in opposite directions, the two clamping strips 603, which are symmetrically threaded to it, slide in opposite directions under the constraint of the guide shaft 604, thereby clamping the substrate 7. The rubber pads 605 on the clamping strips 603 can increase the friction and prevent the substrate 7 from sliding during the printing process, thus improving the printing stability. Next, the second motor 507 is started, and the second motor 507 drives the second screw 506 to rotate, causing the two first threaded seats 508 to move on the second screw 506, which in turn drives the slide table 509 to slide on the first slide rail 511, thus realizing the clamping of the substrate. 7 moves in one horizontal dimension, and finally the third motor 514 is started. The third motor 514 drives the third screw 513 to rotate, so that the two second threaded seats 515 move on the third screw 513, and drive the mounting table 516 to slide on the second slide rail 518, so that the substrate 7 moves in the horizontal direction perpendicular to the moving direction of the slide table 509. Then the first motor 502 is started, and the first motor 502 drives the first screw 503 to rotate. The lifting table 504, which is threaded to the first screw 503, slides up and down on the frame 1 along the guide direction to adjust the height of the substrate 7 so that it fits with the stencil 4. Through the above operations, the substrate 7 is accurately positioned so that the solder paste printing points on the substrate 7 are aligned with the holes on the stencil 4.

[0031] Place an appropriate amount of solder paste on the stencil 4, start the fifth motor 801, the fifth motor 801 drives the fifth screw 802 to rotate, causing the crossbeam 803 to slide on the guide post 804. The scraper 806 moves on the surface of the stencil 4 under the drive of the crossbeam 803, evenly brushing the solder paste onto the corresponding position on the substrate 7, completing the solder paste brushing operation. When it is necessary to adjust the contact force between the scraper 806 and the stencil 4, start the hydraulic cylinder 805 to make the scraper 806 and the stencil 4 in close contact, and adjust the pressure of the scraper 806 on the stencil 4 as needed.

[0032] It will be apparent to those skilled in the art that this invention 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 essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mounting circuit board for ultra-small solder pads, comprising a frame (1), characterized in that: Four columns (2) are fixedly connected to the frame (1). A steel mesh (4) is installed on the four columns (2). An installation structure (3) is provided on the steel mesh (4). The installation structure (3) includes inserts (301). Four inserts (301) are fixedly connected to the four corners of the bottom end of the steel mesh (4). Slots (302) are provided on the columns (2). The inserts (301) are inserted into the slots (302). A locking strip (303) is slidably connected to each of the two columns (2) on the same side. The inserts (301) are provided with... The card slot (304) is engaged with the card strip (303). A fixing block (305) is fixedly connected to the card strip (303). A tension spring (307) is fixedly connected between the fixing block (305) and the column (2). A driving strip (308) is fixedly connected to each adjacent end of the two card strips (303) on the same side. The driving strip (308) is provided with an inclined surface. A pressure frame (309) is slidably connected to the driving strip (308). An anti-detachment block (310) is fixedly connected to the top of the driving strip (308).

2. The mounting circuit board for ultra-small solder pads according to claim 1, characterized in that: The bottom section of the insert (301) is trapezoidal, the end section of the clip (303) is trapezoidal, a guide rod (306) with a T-shaped cross section is fixedly connected to the column (2), and the fixing block (305) is slidably connected to the guide rod (306).

3. A mounting circuit board for ultra-small solder pads according to claim 1, characterized in that: The frame (1) is provided with a positioning structure (5), the positioning structure (5) includes a mounting bracket (501), the mounting bracket (501) is fixedly connected to the frame (1), the mounting bracket (501) and the frame (1) are rotatably connected with a first screw (503), the mounting bracket (501) is fixedly connected with a first motor (502), the output end of the first motor (502) is threadedly connected to the first screw (503), the first screw (503) is threadedly connected with a lifting platform (504), and the lifting platform (504) is slidably connected to the frame (1).

4. A mounting circuit board for ultra-small solder pads according to claim 3, characterized in that: Two first fixing bars (505) are fixedly connected to the lifting platform (504). A second screw (506) is rotatably connected between the two first fixing bars (505). A second motor (507) is fixedly connected to one of the first fixing bars (505). The output end of the second motor (507) is fixedly connected to the second screw (506). Two first threaded seats (508) are threadedly connected to the second screw (506). A slide table (509) is fixedly connected above the two first threaded seats (508).

5. A mounting circuit board for ultra-small solder pads according to claim 4, characterized in that: The bottom end of the slide (509) is fixedly connected to two first slide sleeves (510), and the lifting platform (504) is fixedly connected to two first slide rails (511). The first slide sleeves (510) and the first slide rails (511) are slidably connected.

6. A mounting circuit board for ultra-small solder pads according to claim 4, characterized in that: Two second fixing bars (512) are fixedly connected to the slide (509), and a third screw (513) is rotatably connected between the two second fixing bars (512). A third motor (514) is fixedly connected to one of the second fixing bars (512), and the output end of the third motor (514) is fixedly connected to the third screw (513). Two second threaded seats (515) are threadedly connected to the third screw (513), and a mounting platform (516) is fixedly connected to the two second threaded seats (515). A base plate (7) is fixedly connected to the mounting platform (516) through a clamping structure (6).

7. A mounting circuit board for ultra-small solder pads according to claim 6, characterized in that: The bottom end of the mounting platform (516) is fixedly connected to two second sliding sleeves (517), and two second slide rails (518) are fixedly connected to the slide table (509). The second sliding sleeves (517) and the second slide rails (518) are slidably connected, and the slide table (509) is perpendicular to the moving direction of the mounting platform (516).

8. A mounting circuit board for ultra-small solder pads according to claim 6, characterized in that: The clamping structure (6) includes four mounting blocks (601). The mounting platform (516) is fixedly connected to the four mounting blocks (601). A fourth screw (602) is rotatably connected between two of the mounting blocks (601). The threads at both ends of the fourth screw (602) are opposite. Two clamping strips (603) are symmetrically threaded on the fourth screw (602). The clamping strips (603) are slidably connected to the mounting platform (516). The base plate (7) is clamped between the two clamping strips (603). A fourth motor (606) is fixedly connected to the mounting block (601). The output end of the fourth motor (606) is fixedly connected to the fourth screw (602).

9. A mounting circuit board for ultra-small solder pads according to claim 8, characterized in that: A guide shaft (604) is fixedly connected between the other two mounting blocks (601). The clamping strip (603) is slidably connected to the guide shaft (604). A rubber pad (605) is fixedly connected to the clamping strip (603). The rubber pad (605) abuts against the substrate (7).

10. A mounting circuit board for ultra-small solder pads according to claim 1, characterized in that: The frame (1) is provided with a brushing structure (8), which includes a fifth motor (801). The fifth motor (801) is fixedly connected to the frame (1), and a fifth screw (802) is rotatably connected to the frame (1). The output end of the fifth motor (801) is fixedly connected to the fifth screw (802). A crossbeam (803) is threadedly connected to the fifth screw (802). A guide column (804) is fixedly connected to the frame (1). The crossbeam (803) is slidably connected to the guide column (804). A hydraulic cylinder (805) is fixedly connected to the crossbeam (803). A scraper (806) is fixedly connected to the telescopic end of the hydraulic cylinder (805). The scraper (806) abuts against the steel mesh (4).

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