A jig for soft board measurement

Abstract

The application discloses a jig for soft board measurement, and relates to the technical field of measurement, which comprises a transparent first jig part provided with a storage cavity, a transparent second jig part sealing the opening of the storage cavity to form a closed cavity, a plurality of groups of adjusting components arranged in the storage cavity, the adjusting components being arranged in a rectangular array, the adjusting components comprising a support arranged towards the opening of the storage cavity, the second jig part being provided with an expansion hole opposite the position of the support, part of the support protruding from the surface of the second jig part after penetrating through the expansion hole, wherein the support can rebound, and a transparent third jig part used for pressing against a soft board product placed on the second jig part. The jig can effectively flatten the soft board product, so that subsequent measurement is more accurate, the repeatability of the measurement of the soft board product is improved, and the high product rejection rate caused by misjudgment is reduced.

Description

Technical Field

[0001] This application relates to the field of measurement technology, and in particular to a fixture for measuring flexible printed circuit boards. Background Technology

[0002] With the rapid development of flexible printed circuit board (FPC) electronic products, the quality requirements for FPCs are becoming increasingly stringent, the demand is growing, and the dimensional control requirements are becoming more stringent. Adding reinforcements of varying thicknesses (not limited to aluminum strips, steel sheets, FR4, and PI) to specific areas of the FPC product increases its rigidity for final assembly. However, this reinforcement can result in an uneven surface, leading to significant measurement errors in 2D measurement. Utility Model Content

[0003] This application aims to solve one of the aforementioned technical problems in the prior art. To this end, embodiments of this application provide a fixture for measuring flexible printed circuit boards (FPCBs).

[0004] According to an embodiment of this application, a fixture for measuring flexible circuit boards is provided, including a transparent first fixture component, the first fixture component being provided with a storage cavity; A transparent second fixture is used to seal the opening of the storage cavity to form a sealed cavity; Several sets of adjustment components are disposed in the storage cavity. The adjustment components are arranged in a rectangular array. Each adjustment component includes a support member disposed at the opening facing the storage cavity. A telescopic hole is disposed on the second fixture member opposite the support member. A portion of the support member passes through the telescopic hole and protrudes from the surface of the second fixture member. The support member is capable of springback. A transparent third fixture is used to press against the flexible board product placed on the second fixture.

[0005] The aforementioned fixture for measuring flexible printed circuit boards (FPCBs) has at least the following beneficial effects: When measuring FPCBs, the FPCB is placed in the second fixture. Since the support protrudes from the surface of the second support, the reinforced area of ​​the FPCB will first contact the support. The unreinforced area, being thinner, is in a hollow state. When the third fixture is placed, the weight of the third fixture presses against the FPCB. The support under the reinforced area will slowly retract into the telescopic hole after being stressed until the reinforced area contacts the second fixture. The unreinforced area of ​​the FPCB then begins to be supported by the support. Due to the upward pressure from the rebound of the support, it will completely fit with the top glass cover, thus ensuring that the FPCB portion of the product is level and flat during measurement. This makes subsequent measurements more accurate, improves the repeatability of FPCB measurements, and reduces the high scrap rate caused by misjudgments. The transparent fixture facilitates subsequent measurements.

[0006] According to the fixture for measuring flexible circuit boards described in the embodiments of this application, the diameter of the portion of the support member located in the telescopic hole is 0.03 mm to 0.1 mm smaller than the diameter of the telescopic hole.

[0007] According to the embodiments of this application, the fixture for measuring flexible circuit boards includes an adjustment component comprising a guide and an elastic component, a support component being slidably connected to the guide, and the elastic component being used to provide a supporting force to the support component so that a portion of the support component can protrude from the surface of the second fixture.

[0008] According to the embodiments of this application, the fixture for measuring flexible circuit boards includes a support member comprising a rod and a support portion. The rod portion is located in the telescopic hole. The guide member is provided with a sliding groove for the support portion to slide. The elastic member is disposed in the sliding groove. One end of the elastic member abuts against the support portion, and the other end of the elastic member abuts against the bottom of the sliding groove.

[0009] According to the embodiments of this application, the fixture for measuring flexible circuit boards has a first air inlet structure and a second air inlet structure. The first air inlet structure is used to connect the storage cavity with the outside. The air outlet of the second air inlet structure is located at the end of the support protruding from the surface of the second fixture. The air inlet of the second air inlet structure is connected to the storage cavity.

[0010] According to the fixture for measuring flexible circuit boards described in the embodiments of this application, the second air intake structure includes a first flow channel and a second flow channel. The first flow channel extends from one end of the support member to the other end, and the second flow channel is disposed on the side of the support member. One end of the second flow channel is connected to the first flow channel, and the other end is connected to the storage cavity.

[0011] According to the fixture for measuring flexible circuit boards described in the embodiments of this application, the first air intake structure includes an air intake channel and multiple diversion channels. One end of the diversion channel is connected to one end of the air intake channel, the other end of the diversion channel is connected to the storage cavity, and the other end of the air intake channel is connected to the outside.

[0012] According to the embodiment of this application, a fixture for measuring flexible circuit boards is provided in the placement cavity for supporting the second fixture component, and a sealing structure is provided at the contact point between the second fixture component and the step.

[0013] According to the embodiments of this application, the fixture for measuring flexible circuit boards is made of tempered glass, wherein the first fixture, the second fixture, and the third fixture are all made of tempered glass.

[0014] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0015] The present application will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the structure of the flexible printed circuit board product according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of an existing fixture in the embodiments of this application. Figure 3 This is a schematic diagram of the structure of the fixture used for flexible circuit board measurement in an embodiment of this application. Figure 1 ; Figure 4 This is a schematic diagram of the structure of the third fixture in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the first fixture in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the second fixture in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of the adjustment component in an embodiment of this application. Figure 1 ; Figure 8 This is a schematic diagram of the structure of the adjustment component in an embodiment of this application. Figure 2 ; Figure 9 This is a schematic diagram of the structure of the fixture used for flexible circuit board measurement in an embodiment of this application. Figure 2 .

[0016] Reference numerals: 100 for flexible sheet, 110 for reinforcing sheet, 200 for glass pressing block, 300 for first fixture, 301 for air intake channel, 302 for diversion channel, 310 for adjustment component, 311 for rod, 312 for support, 313 for elastic element, 314 for guide element, 320 for second fixture, 321 for telescopic hole, and 330 for third fixture. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of this application. Preferred embodiments of this application are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of this application, but they should not be construed as limiting the scope of protection of this application.

[0018] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, 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 application 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 application.

[0019] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0020] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0021] like Figure 1 As shown, a portion of the flexible printed circuit board (FPCB) product 100 is provided with a reinforcing sheet 110 to improve the local strength of the FPCB product 100.

[0022] like Figure 2 As shown, the existing measurement method for flexible printed circuit board (FPCB) product 100 involves placing the FPCB product 100 directly on a secondary measurement platform, then placing a glass pressure block 200 on top of the product to flatten it before measurement. Due to the presence of local reinforcements on the product, height differences often occur, and the product itself is prone to deformation. As a result, the product is often uneven and wavy after the glass is placed on it. Repeated measurement errors range from 0.01 to 0.1 mm, leading to measurements exceeding dimensional control standards. This results in a large number of scrapped, reworked, or selected shipments, seriously affecting product delivery efficiency.

[0023] In order to overcome the shortcomings of the prior art, this application provides a fixture for measuring flexible printed circuit boards, which avoids misjudgment caused by the measurement process, speeds up the measurement efficiency of shipment, and ensures that the measurement efficiency is increased while ensuring measurement accuracy, thereby reducing the scrap or rework of finished products caused by measurement errors.

[0024] Reference Figures 3 to 7 The fixture for measuring flexible circuit boards in this application includes a first fixture, a second fixture, a third fixture, and several sets of adjustment components 310.

[0025] The first fixture 300 is transparent and is disposed in the storage cavity. The transparent second fixture 320 is sealed at the opening of the storage cavity to form a closed cavity. Several sets of adjustment components 310 are disposed in the storage cavity and arranged in a rectangular array. The adjustment components 310 include a support member disposed facing the opening of the storage cavity. The second fixture 320 is provided with a telescopic hole 321 opposite to the support member. Part of the support member passes through the telescopic hole 321 and protrudes from the surface of the second fixture 320. The support member is capable of rebounding. The transparent third fixture 330 is used to press against the flexible board product 100 placed in the second fixture 320.

[0026] When performing 100 measurements on flexible printed circuit board products, such as Figure 9 As shown, when the flexible printed circuit board (FPCB) product 100 is placed on the second fixture, the reinforced area of ​​the FPCB product 100 will first contact the support member because the support member protrudes from the surface of the second support member. The unreinforced area is in a hollow state due to the thinness of the product. When the third fixture 330 is placed, the weight of the third fixture 330 presses against the FPCB product 100. The support member under the reinforced area will slowly retract into the telescopic hole 321 after being stressed until the reinforced area contacts the second fixture 320. The unreinforced area of ​​the FPCB product 100 will then be supported by the support member. When it is subjected to the upward pressure of the rebound of the support member, it will completely fit with the top glass cover plate. This ensures that the FPCB part of the product is level and flat during measurement, making subsequent measurements more accurate. This can improve the repeatability of the FPCB product 100 and reduce the high scrap rate caused by misjudgment. The transparent fixture facilitates subsequent measurements.

[0027] The spaced adjustment components 310 ensure that the flexible board product 100 is evenly supported, resulting in more uniform force distribution and better leveling effect.

[0028] In some embodiments, the diameter of the portion of the support member located in the telescopic hole 321 is 0.03 mm to 0.1 mm smaller than the diameter of the telescopic hole 321, so that the telescopic hole 321 acts as a guide to ensure that the support member does not deviate. In the embodiment shown in this application, the diameter of the portion of the support member located in the telescopic hole 321 is 0.05 mm smaller than the diameter of the telescopic hole 321.

[0029] like Figure 8 As shown, the adjustment assembly 310 includes a guide 314 and an elastic element 313. The support member is slidably connected to the guide 314. The elastic element 313 provides support force to the support member so that a portion of the support member can protrude from the surface of the second fixture. That is, when the support member is compressed, the elastic element 313 is compressed. When the external force disappears, the rebound force released by the elastic element 313 can return the support member to its original position protruding from the second fixture member 320, facilitating the leveling of the flexible board product 100 in the next cycle. The guide 314 plays a guiding role, making the rebound of the support member smoother.

[0030] In some embodiments, the support member includes a rod portion 311 and a support portion 312. The rod portion 311 is located in the telescopic hole 321. The guide member 314 is provided with a groove for the support portion 312 to slide. An elastic member 313 is disposed in the groove. One end of the elastic member 313 abuts against the support portion 312, and the other end of the elastic member 313 abuts against the bottom of the groove. The rod portion 311 serves as the main structure supporting the flexible board product 100. Through the cooperation between the support portion 312 and the groove, the support member can slide. Under the action of the elastic member 313, the support member can rebound, ensuring that during the leveling process, all parts of the flexible board product 100 can be effectively supported and supported, so that the flexible board part of the flexible board product 100 is at the same level and flat during measurement.

[0031] In some specific embodiments, the elastic element 313 is a spring; in other embodiments, the elastic element 313 may also be a sheet or other resilient component.

[0032] In some embodiments, the first fixture 300 is provided with a first air intake structure, and the support member is provided with a second air intake structure. The first air intake structure is used to connect the storage cavity with the outside, and the air outlet of the second air intake structure is located at the end of the support member that protrudes from the surface of the second fixture 320. The air inlet of the second air intake structure is connected to the storage cavity. When the flexible board product 100 experiences warping due to single-sided reinforcement, the first air intake structure is connected to an air compressor. The air compressor draws air out of the storage cavity, creating a negative pressure at the air outlet of the second air intake structure to adhere to the warped portion of the flexible board product 100, resulting in a better leveling effect for the flexible board product 100.

[0033] In some specific embodiments, the second air intake structure includes a first flow channel and a second flow channel. The first flow channel extends from one end of the support member to the other end, and the second flow channel is disposed on the side of the support member. One end of the second flow channel is connected to the first flow channel, and the other end is connected to the storage cavity, so that air can circulate and the first flow channel generates negative pressure to adsorb the soft plate product 100.

[0034] In some embodiments, the first air intake structure includes an air intake channel 301 and multiple diversion channels 302. One end of the diversion channel 302 is connected to one end of the air intake channel 301, and the other end of the diversion channel 302 is connected to the storage cavity. The other end of the air intake channel 301 is connected to the outside, which facilitates the rapid extraction of air from the storage cavity.

[0035] In some embodiments, a step is provided inside the storage cavity to support the second fixture 320, and a sealing structure is provided at the contact point between the second fixture 320 and the step to complete the sealing of the storage cavity. In this embodiment, sealant can be applied to the second fixture 320 and the step to form a sealing structure.

[0036] In some embodiments, the first fixture 300, the second fixture 320, and the third fixture 330 are all made of tempered glass, which gives the fixtures sufficient strength and hardness, making subsequent testing easier.

[0037] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A fixture for measuring flexible printed circuit boards, characterized in that: include A transparent first fixture, the first fixture being provided with a storage cavity; A transparent second fixture is used to seal the opening of the storage cavity to form a sealed cavity; Several sets of adjustment components are disposed in the storage cavity. The adjustment components are arranged in a rectangular array. Each adjustment component includes a support member disposed at the opening facing the storage cavity. A telescopic hole is disposed on the second fixture member opposite the support member. A portion of the support member passes through the telescopic hole and protrudes from the surface of the second fixture member. The support member is capable of springback. A transparent third fixture is used to press against the flexible board product placed on the second fixture.

2. The fixture for measuring flexible printed circuit boards according to claim 1, characterized in that: The diameter of the portion of the support member located in the telescopic hole is 0.03 mm to 0.1 mm smaller than the diameter of the telescopic hole.

3. The fixture for measuring flexible printed circuit boards according to claim 2, characterized in that: The adjustment assembly includes a guide and an elastic element. The support is slidably connected to the guide, and the elastic element provides a supporting force to the support so that a portion of the support can protrude from the surface of the second fixture.

4. The fixture for measuring flexible printed circuit boards according to claim 3, characterized in that: The support member includes a rod and a support portion. The rod is located in the telescopic hole. The guide member is provided with a groove for the support portion to slide. The elastic member is disposed in the groove. One end of the elastic member abuts against the support portion, and the other end of the elastic member abuts against the bottom of the groove.

5. The fixture for measuring flexible printed circuit boards according to claim 3, characterized in that: The first fixture is provided with a first air intake structure, and the support is provided with a second air intake structure. The first air intake structure is used to connect the storage cavity with the outside. The air outlet of the second air intake structure is located at the end of the support that protrudes from the surface of the second fixture, and the air inlet of the second air intake structure is connected to the storage cavity.

6. The fixture for measuring flexible printed circuit boards according to claim 5, characterized in that: The second air intake structure includes a first flow channel and a second flow channel. The first flow channel extends from one end of the support member to the other end. The second flow channel is disposed on the side of the support member. One end of the second flow channel is connected to the first flow channel, and the other end is connected to the storage cavity.

7. The fixture for measuring flexible printed circuit boards according to claim 6, characterized in that: The first air intake structure includes an air intake channel and multiple diversion channels. One end of the diversion channel is connected to one end of the air intake channel, the other end of the diversion channel is connected to the storage cavity, and the other end of the air intake channel is connected to the outside.

8. The fixture for measuring flexible printed circuit boards according to claim 6, characterized in that: The storage cavity is provided with a step for supporting the second fixture, and a sealing structure is provided at the contact point between the second fixture and the step.

9. The fixture for measuring flexible printed circuit boards according to claim 1, characterized in that: The first fixture, the second fixture, and the third fixture are all made of tempered glass.

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