Novel position deviation detection jig for golden fingers on flexible circuit board
By aligning the test piece with the gold finger on the test fixture and combining it with the RT9601 open/short circuit test equipment, the problem of gold finger offset detection on flexible circuit boards was solved, achieving efficient offset judgment and improved yield.
Patent Information
- Application Number
- CN202520566684.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-03-28
AI Technical Summary
Existing technology lacks an effective device to detect the misalignment of gold fingers printed on flexible circuit boards, which can cause the misalignment to exceed the error range and affect the use of the circuit board.
Design a testing fixture, which sets up a number of test pieces equal to the number of gold fingers on the testing fixture, and uses the alignment and offset of the test pieces with the gold fingers to judge, combined with the RT9601 open/short circuit test equipment for testing, to determine whether the offset of the gold fingers exceeds the good product range.
This technology enables accurate detection of gold finger offset, ensuring the normal use of flexible circuit boards and improving testing efficiency and product yield.
Smart Images
Figure CN223807799U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to detection fixture technical field, in particular to a kind of novel position deviation detection fixture of gold finger on flexible circuit board. BACKGROUND
[0002] Flexible circuit board is with polyimide or polyester film as base material made of a kind of with highly reliable, excellent flexible printed circuit board, with the characteristics of high wiring density, light weight, thin, good bending.
[0003] Flexible circuit board is with polyimide or polyester film as base material made of a kind of with highly reliable, excellent flexible printed circuit board, with the characteristics of high wiring density, light weight, thin, good bending. UTILITY MODEL CONTENTS
[0004] In order to overcome the deficiencies of the prior art, the utility model provides a kind of novel position deviation detection fixture of gold finger on flexible circuit board, to solve the problem of detecting the gold finger printed on flexible circuit board.
[0005] To solve the above technical problems, the utility model provides the following technical scheme: a kind of novel position deviation detection fixture of gold finger on flexible circuit board, the flexible circuit board is equidistantly provided with several gold fingers, the distance between the center point of adjacent two gold fingers is Xmm, the width of each gold finger is Ymm, the distance between adjacent two gold fingers is X-Ymm, the detection fixture is provided with the detection piece equal to the number of gold finger, the distance between the center point of adjacent two detection pieces is Xmm, the width between each detection piece is Ymm and Xmm is sequentially spaced, the distance between adjacent two detection pieces is (X-Y) / 2mm.
[0006] Preferably, the gold finger is arranged along the width direction of the flexible circuit board, the detection fixture is rectangular, has two long sides and two short sides, the length of the detection fixture is equal to the width of the flexible circuit board at the position provided with the gold finger, and the perpendicular distance from the center point of the detection piece at both ends to the two short sides of the detection fixture is equal.
[0007] Preferably, the distance between the center point of adjacent two gold fingers is 0.5mm, the width of each gold finger is 0.3mm, the distance between adjacent two gold fingers is 0.2mm, the distance between the center point of adjacent two detection pieces on the detection fixture is 0.5mm, and the distance between adjacent two detection pieces is 0.1mm.
[0008] Preferably, the distance between the center points of two adjacent gold fingers is 1 mm, the width of each gold finger is 0.7 mm, the distance between two adjacent gold fingers is 0.3 mm, the distance between the center points of two adjacent detection pieces on the detection fixture is 1 mm, and the distance between two adjacent detection pieces is 0.15 mm.
[0009] Preferably, the distance between the center points of two adjacent gold fingers is 2.54 mm, the width of each gold finger is 1.8 mm, the distance between two adjacent gold fingers is 0.74 mm, the distance between the center points of two adjacent detection pieces on the detection fixture is 2.54 mm, and the distance between two adjacent detection pieces is 0.37 mm.
[0010] Preferably, it also includes a positioning fixture for positioning the flexible circuit board, the positioning fixture being located on one side of the testing fixture.
[0011] Compared with the prior art, the beneficial effects that this utility model can achieve are:
[0012] This invention places the flexible circuit board to be tested on a testing fixture, aligning the two wide sides of the flexible circuit board with the gold fingers with the two sides of the testing fixture. Testing pieces with widths of Ymm and Xmm are then spaced out. When each gold finger is horizontally offset to the left or right by no less than (XY) / 2 - 0.02mm, two gold fingers will simultaneously conduct with the same testing piece, resulting in a short circuit. Based on the display of the open / short circuit tester RT9601, the flexible circuit board is determined to be defective because the offset of the gold fingers printed on the flexible circuit board is too large. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the flexible circuit board and gold fingers of this utility model;
[0014] Figure 2 This is a schematic diagram showing the structure of the gold fingers of this utility model printed on a flexible circuit board without any offset or with the offset within the range of good quality.
[0015] Figure 3 This is a schematic diagram showing the state of the gold fingers of this utility model within the defective product range when the offset is printed on a flexible circuit board.
[0016] Figure 4 This is a schematic diagram of the structure of the testing fixture and testing piece of this utility model;
[0017] Figure 5 A schematic diagram showing the electrical connection structure of two gold fingers to the same detection chip when the gold fingers are misaligned beyond the acceptable range.
[0018] Among them: 1. Gold finger; 2. Testing fixture; 3. Testing piece. Detailed Implementation
[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model is further described below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of this utility model.
[0020] like Figures 1-4 As shown, this utility model provides a novel gold finger offset detection fixture on a flexible circuit board. A plurality of gold fingers 1 are equidistantly arranged on the flexible circuit board. The distance between the center points of two adjacent gold fingers 1 is X mm, the width of each gold finger 1 is Y mm, and the distance between two adjacent gold fingers 1 is X-Y mm. The detection fixture 2 is provided with a number of detection pieces 3 equal to the number of gold fingers 1 (the detection pieces 3 are existing detection elements that can contact and communicate with the gold fingers 1, and can be PCBA, which is existing technology and will not be described in detail here). The distance between the center points of two adjacent detection pieces 3 is X mm, and the widths of each detection piece 3 are Y mm and X mm, which are arranged alternately. The distance between two adjacent detection pieces 3 is (XY) / 2 mm.
[0021] To test whether the gold finger 1 is good or bad, a test piece 3 with a width of Y mm can be used. The distance between the center points of two adjacent test pieces 3 is X mm. The test piece 3 is set on the test fixture 2 so that each test piece 3 is in direct contact with a gold finger 1. When the test piece 3 is powered on, it is electrically connected to the open / short circuit test device RT9601 (an existing device, the specific principle of which will not be described here). According to the display of the open / short circuit test device RT9601, it is easy to know whether each gold finger 1 is good or bad. However, this test fixture 2 cannot effectively test whether the printed gold finger 1 is misaligned too much, causing the flexible circuit board to malfunction.
[0022] This explanation uses the example where the length of the testing fixture 2 is equal to the width of the flexible circuit board where the gold fingers 1 are located: Figure 2 As shown, this is the case where the normally unoffset gold finger 1 is located on the flexible circuit board, such as... Figure 3As shown, the gold fingers 1 are offset by a certain distance on the flexible circuit board. The flexible circuit board to be tested is placed on the detection jig 2, and the two wide edges of the flexible circuit board provided with the gold fingers 1 are aligned with the two edges of the detection jig 2. In this way, the detection pieces 3 with a width of Y mm and X mm are sequentially and spaced apart. When each gold finger 1 is horizontally offset to the left or right by no less than (X-Y) / 2-0.02 mm, there will be a case that two gold fingers 1 are simultaneously connected with the same detection piece 3 (as shown in Figure 5 The detection piece 3 is short-circuited, and the display (FAIL on the screen) of the open / short circuit test equipment RT9601 is displayed, so that it is determined that the flexible circuit board is a defective product, and the offset amount of the gold fingers 1 on the flexible circuit board is too large when printing.
[0023] A positioning jig (not shown in the figure) can be provided on one side of the detection jig 2 for positioning the flexible circuit board. The positioning jig is located on one side of the detection jig 2, so that the position of the flexible circuit board placed for detection is consistent each time, and the flexible circuit board can be quickly placed and taken, improving the detection efficiency.
[0024] As shown in Figure 2 and Figure 4 The gold fingers 1 are arranged along the width direction of the flexible circuit board, and the detection jig 2 is rectangular with two long edges and two short edges. The vertical distance from the center point of the detection piece 3 at both ends to the two short edges of the detection jig 2 is equal to the distance between the two wide edges of the flexible circuit board and the two gold fingers 1 at both ends when the gold fingers 1 are normally arranged on the flexible circuit board without offset. This distance can be set as X-Y / 2 mm. In this way, when the two wide edges of the flexible circuit board provided with the gold fingers 1 are aligned with the two edges of the detection jig 2, one gold finger 1 is electrically connected with one detection piece 3 when the gold fingers 1 are not offset or the offset amount is within the range of a good product.
[0025] The following describes the detection jig 2 required for several specifications of the gold fingers 1 arranged on the common flexible circuit board:
[0026] The distance between the center points of the adjacent two gold fingers 1 is 0.5 mm, the width of each gold finger 1 is 0.3 mm, the distance between the adjacent two gold fingers 1 is 0.2 mm, the distance between the center points of the adjacent two detection pieces 3 on the detection jig 2 is 0.5 mm, and the distance between the adjacent two detection pieces 3 is 0.1 mm. At this time, the offset amount of the gold fingers 1 is greater than or equal to 0.08 mm, which is a defective product.
[0027] The distance between the center points of two adjacent gold fingers 1 is 1mm, the width of each gold finger 1 is 0.7mm, the distance between two adjacent gold fingers 1 is 0.3mm, the distance between the center points of two adjacent detection pieces 3 on the detection jig 2 is 1mm, the distance between two adjacent detection pieces 3 is 0.15mm, and the offset of the gold finger 1 is greater than or equal to 0.13mm as a defective product;
[0028] The distance between the center points of two adjacent gold fingers 1 is 2.54mm, the width of each gold finger 1 is 1.8mm, the distance between two adjacent gold fingers 1 is 0.74mm, the distance between the center points of two adjacent detection pieces 3 on the detection jig 2 is 2.54mm, the distance between two adjacent detection pieces 3 is 0.37mm, and the offset of the gold finger 1 is greater than or equal to 0.35mm as a defective product.
[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A novel position deviation detection jig for a gold finger on a flexible circuit board, wherein a plurality of gold fingers (1) are equidistantly arranged on the flexible circuit board, characterized in that: The distance between the center points of two adjacent gold fingers (1) is X mm, the width of each gold finger (1) is Y mm, the distance between two adjacent gold fingers (1) is X-Y mm, the detection jig (2) is provided with detection pieces (3) equal in number to the gold fingers (1), the distance between the center points of two adjacent detection pieces (3) is X mm, the width between each detection piece (3) is Y mm and X mm is sequentially arranged, and the distance between two adjacent detection pieces (3) is (X-Y) / 2 mm.
2. The new type of position deviation detection jig for the gold finger on the flexible circuit board according to claim 1, characterized in that: The gold fingers (1) are arranged along the width direction of the flexible circuit board, the detection jig (2) is rectangular, having two long sides and two short sides, the length of the detection jig (2) is equal to the width of the flexible circuit board where the gold fingers (1) are arranged, and the vertical distance from the center point of the detection piece (3) at both ends to the two short sides of the detection jig (2) is equal.
3. The new bit offset detection fixture for the gold finger on the flexible circuit board according to claim 1 or 2, characterized in that: The distance between the center points of two adjacent gold fingers (1) is 0.5 mm, the width of each gold finger (1) is 0.3 mm, the distance between two adjacent gold fingers (1) is 0.2 mm, the distance between the center points of two adjacent detection pieces (3) on the detection jig (2) is 0.5 mm, and the distance between two adjacent detection pieces (3) is 0.1 mm.
4. The new bit offset detection fixture for the gold finger on the flexible circuit board according to claim 1 or 2, characterized in that: The distance between the center points of two adjacent gold fingers (1) is 1 mm, the width of each gold finger (1) is 0.7 mm, the distance between two adjacent gold fingers (1) is 0.3 mm, the distance between the center points of two adjacent detection pieces (3) on the detection jig (2) is 1 mm, and the distance between two adjacent detection pieces (3) is 0.15 mm.
5. The new bit offset detection fixture for the gold finger on the flexible circuit board according to claim 1 or 2, wherein: The distance between the center points of two adjacent gold fingers (1) is 2.54 mm, the width of each gold finger (1) is 1.8 mm, the distance between two adjacent gold fingers (1) is 0.74 mm, the distance between the center points of two adjacent detection pieces (3) on the detection jig (2) is 2.54 mm, and the distance between two adjacent detection pieces (3) is 0.37 mm.
6. The new bit offset detection fixture for the gold finger on the flexible circuit board according to claim 1, wherein: A positioning jig for positioning the flexible circuit board is also included, and the positioning jig is located on one side of the detection jig (2).