General circuit board mounting jig

Abstract

The utility model discloses a universal circuit board mounting jig, and the jig comprises a main frame which comprises two longitudinal frames and two transverse frames; the two longitudinal guide grooves are longitudinally connected between the two transverse frames; the supporting pieces are detachably and transversely mounted between the two longitudinal guide grooves, and the mounting positions of the supporting pieces can be adjusted; wherein at least one supporting piece is used for forming a hard board supporting combination and / or a soft board supporting combination, and the supporting surface of the hard board supporting combination is lower than the top face of the jig and used for supporting a hard board; the supporting surface of the soft board supporting combination is flush with the top face of the jig and used for supporting the soft board. The jig provided by the utility model can be used for quickly coping with patch production of single-sided and double-sided flexible printed circuit (FPC) boards with various designs, and also can quickly coping with patch production of rigid printed circuit boards (PCB) with various designs. According to the invention, the proofing efficiency can be greatly improved, the proofing cost can be greatly reduced, the SMT production time and material cost can be reduced, and the time and cost waste can be reduced.

Description

Technical Field

[0001] This application relates to the field of SMT (Surface Mount Technology) mounting fixture technology, specifically to a general circuit board mounting fixture. Background Technology

[0002] In the SMT manufacturing process, we encounter various flexible circuit board (FPC) designs from multiple customers. These designs are often only for sample verification, with tight delivery schedules and strict cost control. If each design uses a dedicated SMT mounting fixture, it will increase time and material costs, resulting in a waste of time and money. Utility Model Content

[0003] The main technical problem addressed by this application is to provide a universal circuit board mounting fixture.

[0004] This application discloses a universal circuit board mounting fixture, comprising: a main frame including two longitudinal sidewalls and two transverse sidewalls; two longitudinal guide grooves longitudinally connected between the two transverse sidewalls; and multiple support members, detachably mounted transversely between the two longitudinal guide grooves, with adjustable mounting positions; wherein at least one support member is used to form a rigid board support assembly and / or a flexible board support assembly, the support surface of the rigid board support assembly being lower than the top surface of the fixture for supporting rigid boards; and the support surface of the flexible board support assembly being flush with the top surface of the fixture for supporting flexible boards.

[0005] In some alternative embodiments, the multiple support members include at least one of the following components: a flexible board support strip having a support surface flush with the top surface of the fixture for supporting the middle area of ​​the flexible board; a grooved support strip having a recessed upper surface and at least one laterally extending groove for supporting and fixing at least one short support block through the groove, the upper surface of the short support block being flush with the top surface of the fixture for providing local support for the flexible board; a flexible board moving edge having a support surface flush with the top surface of the fixture for supporting the edge area of ​​the flexible board, and a magnet embedded in the bottom; and a magnetic metal sheet for pressing and fixing the edge area of ​​the flexible board onto the flexible board moving edge by magnetic adsorption.

[0006] In some alternative embodiments, the magnetic metal sheet has openings that avoid the reference points on the flexible board.

[0007] In some alternative implementations, the short support block is disposed on one of the grooved support bars, or longitudinally spans two of the grooved support bars.

[0008] In some alternative embodiments, the multiple supports include at least one of the following components: a rigid plate support strip having a support surface lower than the top surface of the fixture for supporting the middle region of the rigid plate; and a rigid plate moving strip having a recessed design on one side, having a support surface lower than the top surface of the fixture for supporting the edge region of the rigid plate, and a scale surface flush with the top surface of the fixture and provided with laterally extending scale markings.

[0009] In some alternative implementations, the two lateral borders include a first lateral border, the inner side of the upper surface of the first lateral border being recessed, the recessed portion forming a support area for supporting the edge region of the rigid plate, and the non-recessed portion being provided with laterally extending scale markings.

[0010] In some alternative implementations, the longitudinal border is provided with longitudinally extending scale markings.

[0011] In some optional embodiments, the longitudinal guide groove is provided with a longitudinal through groove, and the two ends of the support member are respectively provided with sinker screw holes. The two ends of the support member are respectively fixed to the two longitudinal guide grooves by screws and nuts.

[0012] In some optional embodiments, the general circuit board mounting fixture further includes: a magnetic metal plate disposed below the main frame; and a plurality of pins, which are adjustablely fixed to the magnetic metal plate by magnetic adsorption and extend upward above the top surface of the fixture for positioning flexible circuit boards.

[0013] In some optional embodiments, the general circuit board mounting fixture further includes: a plurality of fixture positioning posts for supporting the main frame; a base for supporting the fixture positioning posts and the magnetic metal plate; base feet for supporting the base; and a gripper block disposed on the side of the bottom of the base.

[0014] As can be seen from the above technical solutions, the embodiments of this application have the following advantages:

[0015] This application provides a universal fixture by designing multiple detachable support members installed between two longitudinal guide slots. Different support members can be freely selected to achieve different functions. At least one support member can be used to form a flexible board support assembly with a support surface flush with the fixture plane, or a rigid board support assembly with a support surface lower than the fixture plane. Furthermore, the installation position of the support members is adjustable, allowing support for flexible or rigid boards of different sizes and specifications. This provides a universal fixture that can be used for the rapid assembly of single-sided and double-sided FPCs (Flexible Printed Circuits, hereinafter referred to as FPCs) of various designs, as well as for the rapid assembly of PCBs (Printed Circuit Boards, hereinafter referred to as rigid boards) of various designs. As a universal fixture, this application can greatly improve prototyping efficiency and reduce prototyping costs, thereby reducing SMT production time and material costs and minimizing wasted time and resources. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments and the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a top view of a general circuit board mounting fixture according to an embodiment of this application;

[0018] Figure 2 This is a perspective view of a general circuit board mounting fixture according to an embodiment of this application;

[0019] Figure 3 This is an exploded view of a general circuit board mounting fixture according to an embodiment of this application. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0021] The terms "first," "second," "third," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0022] The following detailed descriptions will be provided through specific embodiments.

[0023] refer to Figure 1-3 This application proposes a general-purpose circuit board mounting fixture (hereinafter referred to as the fixture). The fixture includes: a main frame 15, two longitudinal guide grooves 5 and multiple support bars.

[0024] The main frame 15 includes two longitudinal side frames and two transverse side frames; two longitudinal guide grooves 5 are longitudinally connected between the two transverse side frames and are respectively close to the two ends of the two transverse side frames; multiple support members are detachably and transversely installed between the two longitudinal guide grooves, and the installation position is adjustable; wherein, at least one support member is used to form a rigid plate support assembly and / or a flexible plate support assembly, the support surface of the rigid plate support assembly is lower than the top surface of the fixture, and is used to support the rigid plate; the support surface of the flexible plate support assembly is flush with the top surface of the fixture, and is used to support the flexible plate.

[0025] Here, different support methods are used for rigid boards (e.g., printed circuit boards, PCBs) and flexible boards (e.g., flexible printed circuit boards, FPCs). Rigid boards, due to their thicker adhesive, require a recessed design to embed them into the recessed space; therefore, the support surface of the rigid board support assembly is lower than the top surface of the fixture. Flexible boards, on the other hand, are thinner and do not require a recessed design; therefore, the support surface of the flexible board support assembly can be flush with the top surface of the fixture. The top surface of the fixture refers to the upper surface of the main frame 15 of the fixture.

[0026] In some alternative implementations, multiple reference holes may be formed on the four sides of the main frame 15, including two longitudinal borders and two transverse borders. These reference holes can be used to provide a reference for placing the support bars during operation. Optionally, the multiple reference holes can be evenly arranged.

[0027] In some alternative implementations, the two ends of the longitudinal guide groove 5 can be fixed to the bottom of the main frame 15 by a first set of screws and nuts 14, connecting between the two transverse sidewalls.

[0028] In some alternative implementations, the multiple supports include at least one of the following components:

[0029] The flexible board support strip 6 has a support surface flush with the top surface of the fixture and used to support the middle area of ​​the flexible board.

[0030] The grooved support bar 8 has a recessed upper surface and at least one horizontally extending groove for supporting and fixing at least one short support block 4. The upper surface of the short support block 4 is flush with the top surface of the fixture for providing local support for the flexible board.

[0031] The flexible board moving edge 7 has a support surface that is flush with the top surface of the fixture for supporting the edge area of ​​the flexible board, and a magnet 13 is embedded in the bottom.

[0032] Magnetic metal sheet 1 is used to press down and fix the edge area of ​​the flexible board onto the moving edge 7 of the flexible board by magnetic adsorption.

[0033] Here, some or all of the flexible board support strip 6, the grooved support strip 8, the flexible board movable edge 7, and the magnetic metal sheet 1 can form a flexible board support assembly to support the flexible board.

[0034] In some alternative implementations, the magnetic metal sheet 1 has openings that avoid the reference points (mark points) on the flexible circuit board, so that the SMT process equipment can identify the flexible circuit board.

[0035] In some alternative implementations, the magnetic metal sheet 1 can be made of steel, with a thickness of, for example, around 0.06 mm.

[0036] In some alternative embodiments, the short support block 4 includes two types: one is a relatively short single-hole short support block with a single hole, which can be set on a grooved support bar 8; the other is a slightly longer double-hole short support block with two holes, which can be longitudinally straddled on two grooved support bars 8.

[0037] In some alternative implementations, the double-hole short support block can be fixed to two grooved support bars 8 using a second set of screws and nuts 11. This is mainly for local support, and its thickness can be equal to the depth of the grooved support bar 8. After assembly, its height is flush with the top surface of the fixture. The single-hole short support block can be fixed to one grooved support bar 8 using screws and nuts 11. This is also mainly for local support, and its thickness can be equal to the depth of the grooved support bar 8. After assembly, its height is flush with the top surface of the fixture.

[0038] In some alternative implementations, the multiple supports include at least one of the following components:

[0039] The rigid plate support strip 3 has a support surface that is lower than the top surface of the fixture and is used to support the middle area of ​​the rigid plate.

[0040] The rigid plate moving strip 2 has a recessed design on one side, with a support surface that is lower than the top surface of the fixture and is used to support the edge area of ​​the rigid plate, and a scale surface that is flush with the top surface of the fixture and has horizontally extended scale markings.

[0041] In some optional embodiments, the main frame 15 includes two horizontal borders, including a first horizontal border 151. The inner side of the upper surface of the first horizontal border 151 is recessed, forming a support area for supporting the edge region of the rigid plate. The non-recessed portion is provided with horizontally extending scale markings. This first horizontal border 151 serves as a fixed edge supporting the rigid plate. The starting position of its scale, i.e., the 0 position, can be used to determine the starting position of the recess.

[0042] Here, the rigid plate support strip 3, the rigid plate moving strip 2, and the first horizontal frame 151 can form a rigid plate support assembly to support the rigid plate.

[0043] In some alternative implementations, the two sides of the rigid board moving edge 2 can be recessed by 0.5mm in height and 5mm in width, respectively, to form a support surface; the higher middle part can have a dimensional scale to form a scale surface. For example, the position of scale 0 can be aligned with the starting position of the recess, which serves to refer to whether the position of the board placement is consistent with the position of the fixed edge (i.e., the first horizontal frame) and to know the length of the PCB board.

[0044] In some optional embodiments, a longitudinal through slot is formed on the longitudinal guide groove 5, and countersunk screw holes are provided at both ends of the support member. The two ends of the support member are fixed to the two longitudinal guide grooves 5 by screws and nuts respectively. Each support bar can be installed on or removed from the longitudinal guide groove 5 as needed, and can be moved and repositioned on the longitudinal guide groove 5 before being locked and fixed.

[0045] For example, the screw fixing positions at both ends of the rigid plate support strip 3 have recessed hexagonal holes at the top and bottom, and the structure of the middle support position is convex. The top surface of the convex shape is 0.5 mm lower than the top surface of the fixture, and the bottom surface of the convex shape is recessed by 0.5 mm. It can be used in both directions. After flipping, it has a different width. When fixed on the fixture, it is 0.5 mm lower than the surface of the fixture.

[0046] For example, the screw fixing positions at both ends of the flexible board support strip 6 have recessed hexagonal holes at the top and bottom, and the structure of the middle support position is convex, which can be used on both sides. After flipping, it has a different width, and when fixed on the fixture, it is consistent with the height of the top surface of the fixture.

[0047] In some alternative implementations, the longitudinal border of the main frame 15 is provided with longitudinally extending scale markings.

[0048] In some optional embodiments, the universal circuit board mounting fixture of this application further includes:

[0049] A magnetic metal plate 17 is positioned below the main frame 15;

[0050] Multiple ejector pins 12 are adjustablely fixed to the magnetic metal plate 17 by magnetic adsorption and extend upward above the top surface of the fixture for positioning the flexible plate.

[0051] Optionally, a strong magnet may be embedded in the bottom of the ejector pin 12 so that it can be attracted and fixed to the magnetic metal plate 17.

[0052] In some optional embodiments, the universal circuit board mounting fixture of this application further includes:

[0053] Multiple fixture positioning columns 16 are used to support the main frame 15 of the fixture;

[0054] The base 19 is used to support the fixture positioning column 16 and the magnetic metal plate 17.

[0055] The base foot 20 is used to support the base 19 and can be connected to the bottom of the base 19 by the base foot screw 21;

[0056] The gripper block 22 is located on the side of the bottom of the base 19, making it easy for personnel to grip and move the fixture.

[0057] In some alternative embodiments, mounting holes are provided at the four corners of the main frame 15 and the four corners of the base 19 for connecting the fixture positioning column 16.

[0058] In some alternative implementations, the base 19 may be made of materials including, but not limited to, bakelite, to provide sufficient strength and as low a weight as possible.

[0059] In some alternative implementations, the magnetic metal plate 17 can be secured to the base 19 by locking screws 18.

[0060] The above provides a brief description of the universal circuit board mounting fixture of this application. This fixture can be used in the field of SMT surface mount technology, applied to the production of single-sided or double-sided FPCs and PCBs in SMT soldering processes. For example, it is preferably used for PCBs and FPCBs with a thickness of less than 1.2 mm, where the thinness necessitates the use of a fixture for printing and mounting.

[0061] This application adopts an adjustable design, with each support bar being detachable, combinable, and movable, thereby adapting to various types of FPCs and PCBs, even irregular FPCs, to meet the needs of soldering and surface mount processes.

[0062] The assembly method of the fixture in this application is to use different support bars according to different types of plates (soft plates or hard plates, etc.), and adjust their positions through the longitudinal guide grooves on both sides to achieve the support effect:

[0063] 1. When supporting a rigid PCB board: The board edge is fixed to a corner fixture, and then the fixing edge is adjusted to ensure tight positioning. Narrow-faced rigid board support strips are primarily used to support a straight surface. When local support is needed, single-hole and double-hole short strips are used to fix the support strips to the slotted surface, providing localized support. All support strips used for rigid boards are lower than the top surface of the fixture by a certain height, for example, 0.5mm.

[0064] 2. When supporting an FPC flexible board: First, the fixture is fixed by the base. Two diagonally opposite holes are selected on the FPC, and pins are inserted through these holes to position the FPC. Wide-faced flexible board support strips are mainly used to support a straight surface. When local support is needed, single-hole and double-hole short strips are used to fix them to the slotted support strips for localized support. The bottom of the two wide-faced flexible board support strips is inlaid with magnets for supporting the edges of the FPC board. Magnetic metal sheets are then used to cover the edges of the board instead of adhesive tape for fixation.

[0065] The technical solution of this application has been described in detail above through specific embodiments. In the above embodiments, the descriptions of each embodiment have their own emphasis, and for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0066] It should be understood that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and protection scope of the technical solutions of the embodiments of this application.

Claims

1. A universal circuit board mounting jig, characterized by comprising: The utility model relates to a hardboard and softboard supporting jig, comprising: a main frame comprising two longitudinal side frames and two transverse side frames; two longitudinal guide grooves longitudinally connected between the two transverse side frames; a plurality of supporting members detachably mounted between the two longitudinal guide grooves and adjustable in mounting position; at least one of the supporting members is used to form a hardboard supporting assembly and / or a softboard supporting assembly, the supporting surface of the hardboard supporting assembly is lower than the jig top surface and used to support a hardboard, and the supporting surface of the softboard supporting assembly is flush with the jig top surface and used to support a softboard.

2. The universal circuit board mounting jig according to claim 1, wherein The plurality of supporting members comprises at least one of the following components: a softboard supporting strip having a supporting surface flush with the jig top surface and used to support the middle area of a softboard; a slotted supporting strip having a sunken upper surface and at least one horizontally extending slot formed in the upper surface, the slot being used to carry and fix at least one short supporting block, the upper surface of the short supporting block being flush with the jig top surface and used to locally support a softboard; a softboard moving side having a supporting surface flush with the jig top surface and used to support the edge area of a softboard, and a bottom embedded with a magnet; a magnetic metal sheet used to magnetically attract and fix the edge area of a softboard on the softboard moving side.

3. The universal circuit board mounting jig according to claim 2, wherein The magnetic metal sheet is provided with an opening avoiding a reference point on the softboard.

4. The universal circuit board mounting jig according to claim 2, wherein The short supporting block is arranged on one slotted supporting strip or longitudinally arranged between two slotted supporting strips.

5. The universal circuit board mounting fixture of claim 1, wherein The plurality of supporting members comprises at least one of the following components: a hardboard supporting strip having a supporting surface lower than the jig top surface and used to support the middle area of a hardboard; a hardboard moving strip having a sunken side, a supporting surface lower than the jig top surface and used to support the edge area of a hardboard, and a scale surface flush with the jig top surface and provided with horizontally extending scale marks.

6. The universal circuit board mounting fixture of claim 5, wherein The two transverse side frames comprise a first transverse side frame, the inner side of the upper surface of the first transverse side frame is sunken, the sunken part forms a supporting area for supporting the edge area of a hardboard, and the non-sunken part is provided with horizontally extending scale marks.

7. The universal circuit board mounting fixture of any one of claims 1-6, wherein: The longitudinal guide grooves are provided with longitudinally extending long grooves, the two ends of the supporting members are respectively provided with sunken screw holes, and the two ends of the supporting members are respectively fixed on the two longitudinal guide grooves through screws and nuts.

8. The universal circuit board mounting fixture of any one of claims 1-6, wherein: The longitudinal side frames are provided with longitudinally extending scale marks.

9. The universal circuit board mounting fixture of any one of claims 1-6, wherein: The utility model further comprises: a magnetic metal plate arranged below the main frame; a plurality of jigs are fixed on the magnetic metal plate in a magnetically attractive manner and upwardly protrude above the jig top surface, and used to position a softboard.

10. The universal circuit board mounting fixture of claim 9, wherein, The utility model further comprises: a plurality of jig positioning columns used to support the main frame; a base used to carry the jig positioning columns and the magnetic metal plate; a base foot used to support the base; a hand gripping block arranged on the side edge of the bottom of the base.

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