Extraction device special for large case PCBA board

Abstract

The invention discloses a special pulling device for a large case PCBA (Printed Circuit Board Assembly) board, which comprises a pulling handle and a plurality of pulling tensioners matched with the pulling handle, and the pulling tensioners are matched with mounting holes of the PCBA board, so that the stress positions of the PCBA board are the positions of the mounting holes. By arranging the pulling handle and the plurality of pulling expanders matched with the pulling handle, and the plurality of pulling expanders are respectively matched with the plurality of mounting holes, the plurality of mounting holes become a plurality of stress points, so that the PCBA board is subjected to a plurality of stresses at the same time when being pulled out, the stress at a certain position is balanced, the stress is uniform, the PCBA board is pulled out quickly and stably, and the pulling efficiency of the PCBA board is improved. And violent pulling is avoided.

Description

Technical Field

[0001] This invention relates to the field of puller technology, specifically to a puller device for large chassis PCBA boards. Background Technology

[0002] Currently, large chassis products for monitors or controllers typically use double-layered, interlocking PCBA boards or single-layered PCBA boards with thermal pads adhered to the back of the board. After these PCBA boards are installed, after a period of operation, when replacement or repair is needed, dust accumulation or stress, coupled with limited space around the boards, makes it difficult to remove the fixing screws. The usual method is to forcefully pry or pull the PCBA board upwards from its edges. However, due to the large size and surface area of ​​the PCBA board, prying or pulling from a corner can easily deform it, causing internal components and / or circuitry to be pulled and damaged, thus impairing the PCBA board's functionality and potentially rendering it unusable. Therefore, there is an urgent need for a removal device that distributes force evenly when pulling out the PCBA board. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a dedicated pull-out device for large-chassis PCBA boards, including a pull-out handle and multiple pull-out tensioners adapted to the handle. The tensioners engage with the mounting holes of the PCBA board, ensuring that the force application points on the PCBA board are the locations of the mounting holes. By providing a pull-out handle and multiple tensioners adapted to it, with each tensioner engaging with a different mounting hole, the mounting holes become multiple force application points. This allows the PCBA board to be pulled out simultaneously under multiple forces, balancing the force at any single point, resulting in uniform force distribution and enabling rapid and smooth pull-out of the PCBA board, avoiding forceful pulling.

[0004] In one technical solution, the tensioning device includes a tightening bolt, a sleeve, a tensioning element, and a wedge. The tensioning element includes a tensioning body with a threaded hole formed from its top inward to fit the tightening bolt. The tightening bolt is inserted into the upper opening of the sleeve, and the top of the tensioning body is inserted into the lower opening of the sleeve. Simultaneously, the tightening bolt is screwed into the threaded hole, and the nut of the tightening bolt is blocked outside the upper opening of the sleeve. A wedge-shaped hole is formed near the lower end of the tensioning body. A first tensioning slit is formed from the lower end of the wedge-shaped hole to the lower end of the tensioning body. The first tensioning slit divides the area from the lower end of the wedge-shaped hole to the lower end of the tensioning body into opposing tensioning segments. Each tensioning segment forms a tensioning strip downward, and a second tensioning slit is formed between two tensioning strips, which can be inserted into the mounting hole. Opposing fixing ears are formed on the sleeve, and the wedge is inserted into the wedge-shaped hole, with the two fixing ears fixedly connected to the wedge. With the above settings, when the tensioner is in use, the tensioning bar is inserted into the mounting hole, and the tightening bolt is turned to make the tensioning member move upward. At this time, the wedge-shaped hole is opened by the wedge-shaped member, and the tensioning bar is also opened. Of course, at this time, while turning the tightening bolt, a downward force should be applied to prevent the tensioning bar from running out of the mounting hole. When the tensioning bar is gradually opened to the point of jamming the mounting hole, the tensioning handle can be lifted upward to smoothly pull out the PCBA board.

[0005] In one technical solution, the lower end of the wedge-shaped member forms a supplementary tensioning member along the direction pointing towards the second tensioning seam. This supplementary tensioning member does not extend beyond the second tensioning seam during the movement of the wedge-shaped member. Simultaneously with the expansion of the tensioning strip, the second tensioning seam also widens. With the increase in expansion force, or when pulling out the PCBA board, excessive force can cause the tensioning strip to deform towards the second tensioning seam, leading to pull-out failure. Therefore, by setting the supplementary tensioning member, as the second tensioning seam widens, the supplementary tensioning member simultaneously moves to fill the second tensioning seam. This ensures that when the mounting hole is tensioned by the tensioning strip, the tensioning structure at the mounting hole is nearly solid, avoiding the phenomenon of the tensioning strip deforming inwards due to the gradually widening second tensioning seam, thus preventing pull-out failure.

[0006] In one technical solution, the supplementary tensioning member is wedge-shaped, with a larger top and a smaller bottom.

[0007] In one technical solution, the first tensioning seam is a wedge shape that is larger at the top and smaller at the bottom.

[0008] In one technical solution, the second tensioning seam is at least partially wedge-shaped from top to bottom, and is adapted to the shape of the first tensioning seam.

[0009] By setting the shapes of the supplementary tensioning element and the first and second tensioning seams, the second tensioning seam is made easier to fill when it is widened, especially at the mounting hole, and is easy to process and disassemble.

[0010] In one technical solution, a flange is formed on the upper part of the fixing lug of the sleeve, the pull-out handle includes a flange blocking hole, the lower part of the flange of the pull-out tensioner is inserted into the flange blocking hole, and the flange is blocked above the flange blocking hole, and at least the tensioning strip is located outside the flange blocking hole. By providing a pull-out tensioner that adapts to multiple mounting holes, the pull-out is made easier and smoother by using the pull-out handle.

[0011] In one technical solution, the pull-out handle is elongated, and the flange blocking hole is also elongated. Furthermore, the flange blocking hole can accommodate the insertion of multiple pull-out tensioners. By setting the elongated pull-out handle and the elongated flange blocking hole, the installation hole positions can be adapted. Simultaneously, the elongated flange blocking hole accommodates installation holes in different positions, facilitating adjustment and avoiding design errors that could prevent the tensioner from being inserted into the installation hole.

[0012] In one technical solution, there are multiple lifting handles and multiple lifting tensioners adapted to the mounting holes. By using multiple lifting handles and adapting multiple lifting tensioners, preferably two lifting handles and adapting multiple lifting tensioners, it is suitable for operators to operate the lifting with both hands, making the lifting faster and more stable. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the large chassis PCBA board dedicated lifting device of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of a tensioner for pulling out according to the present invention;

[0016] Figure 3 yes Figure 2 Exploded view;

[0017] Figure 4 This is a schematic diagram of another type of tensioner for the present invention;

[0018] Figure 5 yes Figure 4 Exploded view;

[0019] The reference numerals in the figure are as follows: 1-Pull handle; 2-Pull tensioner; 3-Tightening bolt; 4-Sleeve; 5-Tightening element; 6-Wedge-shaped element; 7-Connecting bolt; 11-Flange blocking hole; 41-Fixing lug; 42-Flange; 51-Tightening body; 511-Threaded hole; 512-Wedge-shaped hole; 513-First tensioning slot; 514-Tightening assembly; 515-Tightening strip; 516-Second tensioning slot; 61-Supplementary tensioner. Detailed Implementation

[0020] The present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Other embodiments obtained by those skilled in the art within the scope of the embodiments of the present invention without inventive effort are all within the protection scope of the present invention.

[0021] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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 invention 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 invention.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Example 1

[0025] like Figure 1-3As shown in the figure, this embodiment discloses a special lifting device for large chassis PCBA boards, which includes a lifting handle 1 and a plurality of lifting tensioners 2 adapted to the lifting handle 1. The lifting tensioners cooperate with the mounting holes of the PCBA board so that the force position of the PCBA board is the position of the plurality of mounting holes.

[0026] Specifically, the tensioner 2 includes a tightening bolt 3, a sleeve 4, a tensioning element 5, and a wedge-shaped element 6. The tensioning element 5 includes a tensioning body 51, which forms a threaded hole 511 from its top inward to fit the tightening bolt 3. The tightening bolt 3 is inserted into the upper opening of the sleeve 4, and the top of the tensioning body 51 is inserted into the lower opening of the sleeve 4. At least the portion of the tensioning body 51 inserted into the sleeve 4 is smaller than the through hole of the sleeve 4, so that the portion of the tensioning body 51 located inside the sleeve 4 can move up and down. At the same time, the tightening bolt 3 is screwed into the threaded hole 511, and the nut of the tightening bolt 3 is blocked outside the upper opening of the sleeve 4. The tensioning body 51 forms a wedge-shaped hole 512 near its lower end, that is, a wedge-shaped hole 512 is formed on the portion of the tensioning body 51 outside the sleeve 4. A first tensioning slit 513 is formed from the lower end of the wedge-shaped hole 512 to the lower end of the tensioning body 51. The first tensioning slit 513 divides the portion from the lower end of the wedge-shaped hole 512 to the lower end of the tensioning body 51 into opposing tensioning segments 514. Each tensioning segment 514 linearly forms a tensioning strip 515. The structure of the tensioning strip 515 is not specifically limited. In this embodiment, the tensioning strip 515 is a cylinder divided into two halves by a slit. A second tensioning slit is formed between the two tensioning strips 515. At the same time, the two tensioning strips 515 can be inserted into the same mounting hole. As for the structure of the wedge-shaped hole 512 and the wedge-shaped member 6, there are various ways to achieve that when the tensioning body 51 and the wedge-shaped member 6 move relative to each other, the wedge-shaped hole 512 is expanded by the wedge-shaped member 6, thereby expanding the tensioning segment 514, and then driving the tensioning strip 515 to expand. Of course, when the tensioning body 51 and the wedge-shaped member 6 move relative to each other, there is also an opposite action. That is, when the PCBA board is removed, the tensioning strip 515 is no longer stretched, but instead returns to its original position or close to its original position. In this embodiment, the wedge-shaped hole 512 and the wedge-shaped member 6 are trapezoidal wedge structures with a larger upper part and a smaller lower part. Furthermore, the sleeve 4 has opposing fixing ears 41, the wedge-shaped member 6 is inserted into the wedge-shaped hole 512, and the two fixing ears 41 are fixedly connected to the wedge-shaped member 6. Specifically, the fixing ears 41 form fixing holes, the wedge-shaped member 6 has threaded fixing holes, and the connecting bolt 7 can be screwed into the threaded fixing holes through the fixing holes.

[0027] To accommodate the aforementioned tensioner 2, a flange 42 is formed on the upper part of the fixing lug 41 of the sleeve 4. The tensioner handle 1 includes a flange blocking hole 11. The portion of the tensioner 2 below the flange 42 is inserted into the flange blocking hole 11, while the flange 42 is blocked above the flange blocking hole 11, and at least the tensioning strip 515 is located outside the flange blocking hole 11. Preferably, the tensioner handle 1 is elongated, and the flange blocking hole 11 is also elongated, allowing for the insertion of multiple tensioners 2. In use, multiple tensioners 1 are used, and multiple tensioners 2 are adapted to the mounting holes. In this embodiment, there are two tensioners and three tensioners 2 adapted to the mounting holes.

[0028] Example 2

[0029] like Figure 4 and 5 As shown, this embodiment discloses a dedicated lifting device for large chassis PCBA boards, which is a variation based on Embodiment 1. Specifically, the lower end of the wedge-shaped member 6 forms a supplementary tensioning member 61 along the direction pointing towards the second tensioning seam 516. The supplementary tensioning member 61 does not extend beyond the second tensioning seam 516 during the movement of the wedge-shaped member 6. The shape of the supplementary tensioning member 61 can vary. In this embodiment, the supplementary tensioning member 61 is a wedge shape that is larger at the top and smaller at the bottom. To further match the shape of the supplementary tensioning member 61, the first tensioning seam 513 is also a wedge shape that is larger at the top and smaller at the bottom. Furthermore, the wedge structure of the first tensioning seam 513 extends to the second tensioning seam 516, wherein at least the upper part of the second tensioning seam 516 is part of the wedge structure.

[0030] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A dedicated lifting device for large chassis PCBA boards, characterized in that, It includes a pull-out handle and multiple pull-out tensioners adapted to the pull-out handle. The pull-out tensioners cooperate with the mounting holes of the PCBA board so that the force-bearing position of the PCBA board is at the position of the multiple mounting holes.

2. The dedicated lifting device for large chassis PCBA boards according to claim 1, characterized in that, The tensioning device includes a tightening bolt, a sleeve, a tensioning element, and a wedge. The tensioning element includes a tensioning body with a threaded hole formed from its top inward to fit the tightening bolt. The tightening bolt is inserted into the upper opening of the sleeve, and the top of the tensioning body is inserted into the lower opening of the sleeve. Simultaneously, the tightening bolt is screwed into the threaded hole, and the nut of the tightening bolt is blocked outside the upper opening of the sleeve. The tensioning body has a wedge-shaped hole near its lower end. A first tensioning slit is formed from the lower end of the wedge-shaped hole to the lower end of the tensioning body. The first tensioning slit divides the area from the lower end of the wedge-shaped hole to the lower end of the tensioning body into opposing tensioning segments. Each tensioning segment forms a tensioning strip downward, and a second tensioning slit is formed between the two tensioning strips, which can be inserted into the mounting hole. Opposing fixing ears are formed on the sleeve, and the wedge is inserted into the wedge-shaped hole, with the two fixing ears fixedly connected to the wedge.

3. The dedicated lifting device for large chassis PCBA boards according to claim 2, characterized in that, The lower end of the wedge forms a supplementary tensioning member along the direction pointing to the second tensioning seam, and the supplementary tensioning member does not extend beyond the second tensioning seam as the wedge moves.

4. The dedicated lifting device for large chassis PCBA boards according to claim 3, characterized in that, The supplementary tensioning element is wedge-shaped, with a larger top and a smaller bottom.

5. The dedicated lifting device for large chassis PCBA boards according to claim 3, characterized in that, The first tension seam is wedge-shaped, with a larger top and a smaller bottom.

6. The dedicated lifting device for large chassis PCBA boards according to claim 5, characterized in that, The second tensioning seam is at least partially wedge-shaped from top to bottom, and its shape is adapted to the shape of the first tensioning seam.

7. The dedicated lifting device for large chassis PCBA boards according to claims 2-6, characterized in that, A flange is formed on the upper part of the fixing lug of the sleeve, the pull handle includes a flange blocking hole, the lower part of the flange of the pull tensioner is inserted into the flange blocking hole, the flange is blocked above the flange blocking hole, and at least the tensioning strip is located outside the flange blocking hole.

8. The dedicated lifting device for large chassis PCBA boards according to claim 7, characterized in that, The pull handle is elongated, and the flange blocking hole is also elongated. In addition, the flange blocking hole can accommodate the insertion of multiple pull tensioners.

9. The dedicated lifting device for large chassis PCBA boards according to claim 8, characterized in that, There are multiple pull-out handles, and multiple pull-out tensioners that are adapted to the mounting holes.

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