A paster jig for flexible circuit board

Abstract

This utility model belongs to the field of fixture technology, and in particular to a mounting fixture for flexible circuit boards. It includes a fixture body, which comprises a fixture substrate and several spring-loaded rods disposed on the substrate. Each spring-loaded rod includes a turntable, a telescopic rod, and a locking mechanism. This utility model achieves three-dimensional pressing and positioning of flexible circuit boards by combining the elastic pressure of the spring-loaded rods with the adjustable angle of the turntable. This avoids the edge warping defects caused by traditional magnetic suction and vacuum adsorption. The adjustable turntable angle, combined with the length adjustment of the telescopic rods, can accommodate flexible circuit boards of different sizes and numbers of sides. The ball-head structure allows the pressure plate to automatically adhere to the substrate surface. Insulating pads prevent pressure damage. The positioning pin design facilitates quick pressure plate replacement. The locking mechanism uses toothed blocks to precisely lock the turntable angle, effectively solving the alignment deviation and printing offset problems caused by edge warping of flexible circuit boards, significantly improving mounting accuracy and yield.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically to a patch fixture for flexible circuit boards. Background Technology

[0002] Flexible printed circuit boards (PCBs) are highly reliable and extremely flexible printed circuit boards made with polyimide or polyester film as the substrate. They are characterized by high wiring density, light weight, thinness, and good bending flexibility. Fixtures are a broad category of tools used in woodworking, metalworking, fitting, machinery, electrical control, and other handicrafts. They are primarily used to assist in controlling position or movement. Fixtures can be divided into three categories: process assembly fixtures, project testing fixtures, and circuit board testing fixtures. SMT fixtures are tools used to assist SMT machines in mounting flexible PCBs.

[0003] Existing fixture technologies mostly use magnetic attraction to fix or vacuum adsorption of flexible circuit boards, but the edges and corners of the flexible circuit boards may still warp locally due to the elasticity of the material, which can easily cause alignment deviations and printing misalignments, resulting in unsatisfactory performance.

[0004] Therefore, we propose a surface mount fixture for flexible circuit boards to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a mounting fixture for flexible circuit boards, which solves the problems mentioned in the background art, such as warping of the corners of flexible circuit boards, which easily leads to alignment deviations and printing offsets.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0009] A mounting fixture for flexible circuit boards includes a fixture body, the fixture body including a fixture substrate and a plurality of spring pressure rods disposed on the fixture substrate;

[0010] The spring rod includes a turntable, a telescopic rod, and a locking mechanism. One end of the telescopic rod is provided with a pressure plate, and the other end extends into the turntable and is provided with an elastic element.

[0011] The bottom of the turntable extends into the interior of the fixture base plate and is rotatably connected thereto. One end of the locking mechanism abuts against the turntable to lock the angle of the turntable.

[0012] Furthermore, the telescopic pressure rod includes a square tube and a square rod disposed inside the square tube. An adjusting screw is threaded inside the square rod, and one end of the adjusting screw extends to the outside of the square tube.

[0013] Furthermore, a ball head is movably fitted at the bottom of one end of the square rod, and a threaded end of the ball head is provided that screws into the pressure plate.

[0014] Furthermore, the top of the turntable is provided with a movable groove, and both sides of the square tube are provided with rotating shafts. One end of the square tube extends into the interior of the movable groove and is movably connected to it through the rotating shafts.

[0015] Furthermore, the bottom end of the elastic element at one end of the square tube is engaged with the bottom of the inner wall of the movable groove, and the elastic element is a spring.

[0016] Furthermore, the spring pressure rod also includes a positioning pin, one end of which is provided with a connecting rope, and the other end of which is fixedly connected to the top of the fixture base plate.

[0017] Furthermore, a positioning groove is provided on one side of the square tube. The positioning groove and the elastic element are opposite each other along the radial direction of the square tube. One end of the positioning pin is inserted into the interior of the positioning groove from one side of the turntable. The positioning pin and the rotating shaft are located on both sides of the center vertical line of the turntable.

[0018] Furthermore, the bottom of the turntable is provided with a ring of teeth, and the locking mechanism includes a screw hole located inside the fixture base plate and on one side of the teeth, with a limiting screw screw threaded inside the screw hole.

[0019] Furthermore, a square hole is provided on one side of the inner wall of the screw hole, and a toothed block is movably arranged inside the square hole. One end of the toothed block engages with one of the retaining teeth, and the other end is connected to one end of the limiting screw through a compression spring.

[0020] Furthermore, the fixture substrate is also provided with several suction cups inside.

[0021] (III) Beneficial Effects

[0022] Compared with the prior art, the present invention provides a mounting fixture for flexible circuit boards, which has the following advantages:

[0023] This invention combines the elastic pressure of a spring-loaded rod with the adjustment of the turntable angle to achieve three-dimensional pressing and positioning of flexible circuit boards. This avoids the edge warping defects caused by traditional magnetic suction and vacuum adsorption. The adjustable turntable angle, combined with the length adjustment of the telescopic rod, can adapt to flexible circuit boards of different sizes and number of sides. The ball head structure allows the pressure plate to automatically adhere to the substrate surface, the insulating pad prevents pressure damage, the positioning pin design facilitates quick replacement of the pressure plate, and the locking mechanism achieves precise locking of the turntable angle through toothed block engagement. This effectively solves the alignment deviation and printing offset problems caused by edge warping of flexible circuit boards, significantly improving the placement accuracy and yield. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of the fixture of this utility model;

[0025] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0026] Figure 3 This is a cross-sectional view of the telescopic pressure bar structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the telescopic pressure bar structure of this utility model;

[0028] Figure 5 This is a cross-sectional view of the locking mechanism of this utility model.

[0029] In the diagram: 1. Fixture body; 11. Fixture base plate; 111. Suction cup; 12. Spring rod; 121. Turntable; 122. Telescopic rod; 1221. Square tube; 1222. Square rod; 1223. Adjusting screw; 1224. Ball head; 1225. Rotating shaft; 1226. Positioning groove; 123. Locking mechanism; 1231. Screw hole; 1232. Limiting screw; 1233. Square hole; 1234. Tooth block; 1235. Compression spring; 124. Pressure plate; 125. Elastic element; 126. Movable groove; 127. Positioning pin; 128. Connecting rope; 129. Clamping tooth. Detailed Implementation

[0030] 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.

[0031] Example

[0032] like Figure 1-5 As shown, an embodiment of the present invention provides a mounting fixture for a flexible circuit board, comprising a fixture body 1, wherein the fixture body 1 includes a fixture substrate 11 and a plurality of spring pressure rods 12 disposed on the fixture substrate 11.

[0033] The spring rod 12 includes a turntable 121, a telescopic rod 122 and a locking mechanism 123. One end of the telescopic rod 122 is provided with a pressure plate 124, and the other end extends into the turntable 121 and is provided with an elastic element 125.

[0034] The bottom of the turntable 121 extends into the interior of the fixture base plate 11 and is rotatably connected thereto. One end of the locking mechanism 123 abuts against the turntable 121 and is used to lock the angle of the turntable 121.

[0035] There are no fewer than four spring bars 12 on the fixture base plate 11, which correspond to the four corners of the fixture base plate 11 and are used for flexible circuit boards with conventional four sides. However, they are not limited to four. The number of spring bars 12 can be increased along the four sides of the fixture base plate 11, so that they can be used for multi-sided flexible circuit boards with more than four sides.

[0036] The spring lever 12 is flat and the pressure plate 124 presses the non-pad area of ​​the corner of the flexible circuit board, which is usually the process edge or blank area, and does not affect the component layout.

[0037] By adjusting the elastic pressure of the spring rod 12 and the angle of the turntable 121, dynamic pressing of the flexible circuit board in three-dimensional space is achieved, overcoming the edge warping defects caused by traditional magnetic attraction and vacuum adsorption.

[0038] like Figure 3-4 As shown, in some embodiments, the telescopic pressure rod 122 includes a square tube 1221 and a square rod 1222 disposed inside the square tube 1221. An adjusting screw 1223 is threaded inside the square rod 1222, and one end of the adjusting screw 1223 extends to the outside of the square tube 1221.

[0039] The square shape of the square rod 1222 and the square tube 1221 prevents the square rod 1222 from rotating inside the square tube 1221. A limit structure is provided at the connection between the adjusting screw 1223 and the square tube 1221, so that the adjusting screw 1223 can only rotate and cannot move back and forth. By rotating the adjusting screw 1223, the sliding friction transmits the motion, which drives the square rod 1222 to move telescopically inside the square tube 1221. The length of the telescopic pressure rod 122 is adjusted to adapt to flexible circuit boards of different sizes.

[0040] like Figure 3 As shown, in some embodiments, a ball head 1224 is movably sleeved at the bottom of one end of the square rod 1222, and a threaded head is provided on the ball head 1224, one end of which is screwed into the pressure plate 124.

[0041] The ball head 1224 allows the pressure plate 124 to automatically fit against the top of the fixture substrate 11 when it descends, thus pressing the flexible circuit board more stably. The threaded head allows the pressure plate 124 to be replaced with a pressure plate 124 of different sizes. The bottom of the pressure plate 124 is provided with an insulating pad to prevent damage to the flexible circuit board.

[0042] like Figure 2As shown, in some embodiments, the top of the turntable 121 is provided with a movable groove 126, and both sides of the square tube 1221 are provided with a rotating shaft 1225. One end of the square tube 1221 extends into the interior of the movable groove 126 and is movably connected to it through the rotating shaft 1225.

[0043] The square tube 1221 can swing along the movable groove 126 via the rotating shaft 1225 to achieve the action of pressing down on the flexible circuit board and detaching from the flexible circuit board.

[0044] like Figure 2 As shown, in some embodiments, the bottom end of the elastic element 125 at one end of the square tube 1221 is engaged with the bottom of the inner wall of the movable groove 126, and the elastic element 125 is a spring.

[0045] The elastic element 125 lifts one end of the telescopic pressure rod 122, causing the pressure plate 124 at the other end to press against the flexible circuit board. Since the force of the pressure plate 124 pressing against the flexible circuit board is determined by the elastic element 125, different specifications of elastic elements 125 can be replaced for adaptation according to the specifications of the positioning flexible circuit board.

[0046] like Figure 2 As shown, in some embodiments, the spring pressure rod 12 further includes a positioning pin 127, one end of which is provided with a connecting rope 128, and the other end of the connecting rope 128 is fixedly connected to the top of the fixture base plate 11.

[0047] When the pressure plate 124 needs to be replaced, the telescopic pressure rod 122 can be kept horizontal, and the positioning pin 127 can be inserted into the positioning groove 1226 from one side of the turntable 121 to position the telescopic pressure rod 122, so that the pressure plate 124 is suspended in the air, which facilitates the replacement of the pressure plate 124. The positioning pin 127 is pulled by the connecting rope 128 and will not fall off or be lost after being pulled out.

[0048] like Figure 4 As shown, in some embodiments, a positioning groove 1226 is also provided on one side of the square tube 1221. The positioning groove 1226 and the elastic element 125 are opposite each other along the radial direction of the square tube 1221. One end of the positioning pin 127 is inserted into the interior of the positioning groove 1226 from one side of the turntable 121. The positioning pin 127 and the rotating shaft 1225 are respectively located on both sides of the central vertical line of the turntable 121.

[0049] like Figure 5As shown, in some embodiments, the bottom of the turntable 121 is provided with a ring of retaining teeth 129, and the locking mechanism 123 includes a screw hole 1231 disposed inside the fixture base plate 11 and located on one side of the retaining teeth 129. A limiting screw 1232 is threaded inside the screw hole 1231. A square hole 1233 is provided on one side of the inner wall of the screw hole 1231. A tooth block 1234 is movably disposed inside the square hole 1233. One end of the tooth block 1234 engages with one of the retaining teeth 129, and the other end is connected to one end of the limiting screw 1232 through a compression spring 1235.

[0050] When the angle of turntable 121 needs to be adjusted, the limit screw 1232 is rotated to disengage from the tooth block 1234, allowing the tooth block 1234 to have a small amount of space to retract. When the turntable 121 is rotated, the turntable 121 rotates and drives the retaining tooth 129 of one revolution to abut against the tooth block 1234. The tooth block 1234 compresses the compression spring 1235 to retract and avoid. After the angle adjustment is completed, the limit screw 1232 is rotated so that one end abuts against the tooth block 1234, so that the tooth block 1234 and the retaining tooth 129 are locked, thus locking the angle of the turntable 121.

[0051] like Figure 1 As shown, in some embodiments, the fixture substrate 11 is further provided with a plurality of suction cups 111 inside.

[0052] The suction cup 111 is a commonly used accessory for flexible circuit board fixtures. It is mainly used to adsorb the body of the flexible circuit board for positioning. The corners of the flexible circuit board are positioned to prevent warping by spring pressure rods 12.

[0053] In summary, by combining the elastic pressure of the spring lever 12 with the angle adjustment of the turntable 121, the flexible circuit board is pressed and positioned in three-dimensional space, avoiding the edge warping defects caused by traditional magnetic suction and vacuum adsorption. The adjustable angle of the turntable 121, combined with the length adjustment of the telescopic lever 122, can adapt to flexible circuit boards of different sizes and number of sides. The ball head 1224 structure allows the pressure plate 124 to automatically adhere to the substrate surface, the insulating pad prevents pressure damage, the positioning pin 127 design facilitates quick replacement of the pressure plate 124, and the locking mechanism 123 achieves precise locking of the turntable 121 angle through the engagement of the toothed block 1234. This effectively solves the alignment deviation and printing offset problems caused by edge warping of the flexible circuit board, significantly improving the placement accuracy and yield.

[0054] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A paster jig for a flexible circuit board comprising a jig main body (1), characterized by: The fixture body (1) includes a fixture base plate (11) and a plurality of spring pressure rods (12) disposed on the fixture base plate (11); The spring rod (12) includes a turntable (121), a telescopic rod (122) and a locking mechanism (123). One end of the telescopic rod (122) is provided with a pressure plate (124), and the other end extends into the turntable (121) and is provided with an elastic element (125). The bottom of the turntable (121) extends into the interior of the fixture base plate (11) and is rotatably connected thereto. One end of the locking mechanism (123) abuts against the turntable (121) to lock the angle of the turntable (121).

2. The paster jig for a flexible circuit board according to claim 1, wherein: The telescopic pressure rod (122) includes a square tube (1221) and a square rod (1222) disposed inside the square tube (1221). An adjusting screw (1223) is threaded inside the square rod (1222), and one end of the adjusting screw (1223) extends to the outside of the square tube (1221).

3. The paster jig for a flexible circuit board according to claim 2, wherein: A ball head (1224) is movably sleeved at the bottom of one end of the square rod (1222), and a threaded head is provided on the ball head (1224) with one end screwed into the pressure plate (124).

4. The paster jig for a flexible circuit board according to claim 2, wherein: The top of the turntable (121) is provided with a movable groove (126), and both sides of the square tube (1221) are provided with a rotating shaft (1225). One end of the square tube (1221) extends into the interior of the movable groove (126) and is movably connected to it through the rotating shaft (1225).

5. The paster jig for a flexible circuit board according to claim 4, wherein: The bottom end of the elastic element (125) at one end of the square tube (1221) is inserted into the bottom of the inner wall of the movable groove (126), and the elastic element (125) is a spring.

6. The paster jig for a flexible circuit board according to claim 4, wherein: The spring rod (12) also includes a positioning pin (127), one end of which is provided with a connecting rope (128), and the other end of the connecting rope (128) is fixedly connected to the top of the fixture base plate (11).

7. A mounting fixture for flexible circuit boards according to claim 6, characterized in that: A positioning groove (1226) is also provided on one side of the square tube (1221). The positioning groove (1226) and the elastic element (125) are opposite each other along the radial direction of the square tube (1221). One end of the positioning pin (127) is inserted into the interior of the positioning groove (1226) from one side of the turntable (121). The positioning pin (127) and the rotating shaft (1225) are located on both sides of the center vertical line of the turntable (121).

8. The patching jig for flexible circuit boards of claim 1, wherein: The bottom of the turntable (121) is provided with a ring of retaining teeth (129), and the locking mechanism (123) includes a screw hole (1231) disposed inside the fixture base plate (11) and located on one side of the retaining teeth (129). The screw hole (1231) is threaded with a limiting screw (1232).

9. The paster jig for a flexible circuit board according to claim 8, wherein: A square hole (1233) is provided on one side of the inner wall of the screw hole (1231). A toothed block (1234) is movably arranged inside the square hole (1233). One end of the toothed block (1234) engages with one of the retaining teeth (129), and the other end is connected to one end of the limiting screw (1232) through a compression spring (1235).

10. The patching tool for flexible circuit boards of claim 1, wherein: The fixture base plate (11) is also provided with a number of suction cups (111).

Images