Equipment for automatically detecting PCBA (Printed Circuit Board Assembly)

Abstract

The utility model discloses a device for automatically detecting a PCBA (Printed Circuit Board Assembly), comprising a main seat which is a C-shaped plate; the electric linear driving device is integrally installed at the bottom of the inner wall of the main base, the output end of the electric linear driving device is located on the upper side of the electric linear driving device, a horizontal plastic substrate is detachably installed on the upper side of the electric linear driving device, and a positioning structure used for positioning the PCB is installed on the plastic substrate; the metal probes are used for being in contact with and detecting the PCB, the metal probes are fixedly inserted into the top of the main seat, and the plastic substrate and the PCB are located in the C-shaped cavity of the main seat and located under the top of the main seat; and the control box is connected with the metal probe through an electric signal line and is separated from the main seat. On the basis of retaining the original functions, the control box and the test execution unit (the electric linear driving device, the metal probe and the main seat) are separately arranged, and the main seat is arranged to be a C-shaped plate, so that the overall structure is obviously simplified, and the material cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic detection, in particular to a device for automatically detecting PCBA. Background Art

[0002] The applicant has filed a patent application with publication number CN109490759A, application date 2018.12.19, and publication date 2019.03.19. The patent application discloses a PCBA automated testing tool, including the following parts: a machine base; a PCB fixed base for placing the PCB circuit board under test flatly; a flat PCB pressing plate; an electronic control unit; a number of metal probes for detecting the performance of the PCB circuit board under test; a driving component installed on the machine base; a vertically arranged driving rod; wherein the power output end of the driving component is connected to the upper end of the driving rod, the lower end of the driving rod is connected to the PCB pressing plate, the metal probe is inserted into the PCB pressing plate and connected to the electronic control unit, the PCB fixed base is fixedly connected to the machine base, and the PCB pressing plate is directly above the PCB circuit board under test and parallel to the PCB circuit board under test.

[0003] However, the applicant discovered the following problems during the implementation of the above solution:

[0004] 1. The equipment is relatively heavy because the base and the control box are connected as a whole, and a driving component needs to be set on the base to control the height position of the PCB pressing plate and its metal probe, and the weight of the whole machine is relatively large;

[0005] 2. The types of inspection objects are limited. Since the PCB fixing base is fixedly connected to the machine base and cannot be disassembled, the position of the positioning pin is also fixed. It can only locate a single standard specification PCB circuit board, and cannot meet the inspection requirements of PCB circuit boards of different specifications. Utility Model Content

[0006] The purpose of the utility model is to provide a device for automatically detecting PCBA, which further improves the solution previously proposed by the applicant to solve the problems existing in the prior art.

[0007] The purpose of the utility model is achieved as follows: a device for automatically detecting PCBA, comprising:

[0008] A main seat, which is a C-shaped plate, and its C-shaped cavity is horizontally facing the operator;

[0009] An electric linear drive device, which is integrally mounted on the bottom of the inner wall of the main seat, with its output end located on its upper side, a horizontal plastic substrate detachably mounted on the upper side of the electric linear drive device, and a positioning structure for positioning the PCB circuit board mounted on the plastic substrate;

[0010] A plurality of metal probes for contacting and detecting the PCB circuit board, wherein the metal probes are fixedly plugged into the top of the main seat, and the plastic substrate and the PCB circuit board are located in the C-shaped cavity of the main seat and directly below the top of the main seat;

[0011] A control box is connected to the metal probe via an electrical signal line and is separated from the main seat. The control box has an electric control unit connected to the metal probe electrical signal.

[0012] Furthermore, the control box is provided with an interface electrically connected to its electric control unit, and is provided with a plug docked with the interface, and the plug is connected to all metal probes through a number of electrical signal lines.

[0013] Furthermore, the main seat is composed of a main body plate and an upper base plate; the main body plate is configured as an L-shaped plate as a whole and has a bottom plate portion and a vertical plate portion, and the electric linear drive device is installed as a whole on the bottom plate portion of the main body plate; the upper base plate is configured as a flat plate structure, and the upper base plate is detachably fixedly connected to the upper side of the vertical plate portion of the main body plate, and the metal probe is fixedly plugged into the upper base plate.

[0014] Furthermore, the electric linear drive device comprises:

[0015] The electric cylinder has a cylinder barrel fixed to the bottom of the inner wall of the main seat and a telescopic rod facing upward;

[0016] A guide slide having a horizontal portion and a vertical portion, wherein the horizontal portion of the guide slide is detachably connected to and supports the plastic substrate;

[0017] A vertically extending outer guide rail is fixedly connected to the outer wall of the cylinder barrel of the electric cylinder, and the vertical portion of the guide slide seat is lifted and slidably matched with the outer guide rail.

[0018] The beneficial effects of the utility model are:

[0019] 1. The control box and the test execution unit (electric linear drive device, metal probe and main seat) are set separately, and the main seat is set as a C-shaped plate, which significantly simplifies the overall structure, saves material costs, and allows the control box and the test execution unit to be made into a portable structure;

[0020] 2. Use an electric linear drive device to push the PCB circuit board upward to the bottom of the metal probe. The position of the metal probe is fixed, which can fully utilize the advantages of the electric linear drive device to accurately control the height position of the PCB circuit board. The driving source of the electric linear drive device is an electric cylinder, which can ensure the accuracy of the height position of the PCB circuit board;

[0021] 3. The plastic substrate is made of plastic, which is relatively light and reduces the load of the electric linear drive device. Since the plastic substrate can be disassembled, it can be tailored according to PCB circuit boards of different specifications. The plastic substrate is easy to obtain and make, saving material costs;

[0022] 4. The cooperation between the guide slide and the outer guide rail can further ensure the stability and guidance of the lifting trajectory of the PCB circuit board, which can meet the needs of large-scale stable detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a system layout diagram of the utility model.

[0024] Figure 2 It is a schematic diagram of a PCB circuit board in a testing state from a side perspective.

[0025] Figure 3 It is a schematic diagram showing the PCB circuit board at the lowest position from a side perspective.

[0026] Figure 4 It is a control relationship schematic diagram of the utility model.

[0027] Figure 5 This is a schematic diagram of the first positioning solution for a PCB circuit board.

[0028] Figure 6 This is a schematic diagram of the second positioning solution for PCB circuit boards.

[0029] Figure 7 yes Figure 6 AA section view in.

[0030] Figure 8 is based on Figure 6 Bottom view of . DETAILED DESCRIPTION

[0031] The following will be combined with the attached embodiment of the utility model Figure 1-8 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figure 1 As shown, a device for automatically detecting PCBA includes:

[0033] The main seat 6 is configured as a C-shaped plate, and its C-shaped cavity is horizontally facing the operator;

[0034] An electric linear drive device is integrally mounted on the bottom of the inner wall of the main seat 6, with its output end located on its upper side. A horizontal plastic substrate 4 is detachably mounted on the upper side of the electric linear drive device, and a positioning structure for positioning the PCB circuit board 5 is mounted on the plastic substrate 4;

[0035] A plurality of metal probes 7 for contacting and detecting the PCB circuit board 5, the metal probes 7 are fixedly plugged into the top of the main seat 6, the plastic substrate 4 and the PCB circuit board 5 are located in the C-shaped cavity of the main seat 6 and are located directly below the top of the main seat 6;

[0036] The control box 12 is connected to the metal probe 7 via an electrical signal line and is separated from the main seat 6. The control box 12 has an electric control unit connected to the metal probe 7 via an electrical signal line. That is, the control box 12 and the main seat 6 are independent of each other.

[0037] Among them, the control box 12 can be set as an industrial control box structure with a display screen, and all the test results are displayed on the display screen. Since the control box 12 is set separately, it can be made into a portable control box body structure, which is convenient for the operator to carry and transport.

[0038] In order to facilitate quick wiring, the control box 12 is provided with an interface 12a electrically connected to its electronic control unit, and is provided with a plug 11 docking with the interface 12a. The plug 11 is connected to all metal probes 7 through a number of electrical signal lines.

[0039] like Figure 2 , 3 As shown, the main seat 6 is composed of a main body plate 6a and an upper base plate 6c; the main body plate 6a is configured as an L-shaped plate as a whole, and has a bottom plate portion and a vertical plate portion, and the electric linear drive device is integrally installed on the bottom plate portion of the main body plate 6a; the upper base plate 6c is configured as a flat plate structure, and the upper base plate 6c is detachably fixedly connected to the upper side of the vertical plate portion of the main body plate 6a, and the metal probe 7 is fixedly plugged into the upper base plate 6c.

[0040] The upper side of the vertical plate portion of the above-mentioned main plate 6a is bent to form a flat upper bending portion 6b, which horizontally supports and detachably fixes and connects to the upper base plate 6c. The upper bending portion 6b can facilitate the positioning of the upper base plate 6c, thereby facilitating the locking of the position of the metal probe 7.

[0041] The above-mentioned electric linear drive device comprises:

[0042] The electric cylinder 1, whose cylinder barrel is fixed to the bottom of the inner wall of the main seat 6, and whose telescopic rod faces upward, the electric cylinder 1;

[0043] A guide slide 2 made of plastic, having a horizontal portion and a vertical portion, wherein the horizontal portion of the guide slide 2 is detachably connected to and supports a plastic substrate 4;

[0044] The outer guide rail 3 extends vertically, and the outer guide rail 3 is fixedly connected to the outer wall of the cylinder barrel of the electric cylinder 1. The vertical part of the guide slide 2 is lifted and slidably matched with the outer guide rail 3.

[0045] When testing, follow the steps below:

[0046] S1, preparation process, place the control box 12 and the main seat 6 on the test workbench, and turn on the power of the control box 12;

[0047] S2, ensuring that the plastic substrate 4 is at the lowest position, and then placing the PCB circuit board 5 on the plastic substrate 4, and positioning the PCB circuit board 5 using the positioning structure on the plastic substrate 4;

[0048] S3, operate the corresponding control key of the control box 12, and use the electric cylinder 1 to push the plastic substrate 4 and the PCB circuit board 5 upward. Since the plastic substrate 4 and the PCB circuit board 5 are light in weight, the load of the electric cylinder 1 is small, and high-precision position adjustment can be easily achieved, so that the PCB circuit board 5 contacts the metal probe 7 upward;

[0049] S4. After the inspection is completed, the plastic substrate 4 and the PCB circuit board 5 are pulled down to the initial position by the electric cylinder 1, and the PCB circuit board 5 after the inspection is removed.

[0050] The above process is repeated in this way. Compared with the solution disclosed in the patent application document with publication number CN109490759A previously proposed by the applicant, the advantages are:

[0051] 1. The control box 12 and the test execution unit (electric linear drive device, metal probe 7 and main seat 6) are separately arranged, and the main seat 6 is set as a C-shaped plate, which significantly simplifies the overall structure, saves material costs, and can make the control box 12 and the test execution unit into a portable structure;

[0052] 2. The electric linear drive device is used to push the PCB circuit board 5 upward to the bottom of the metal probe 7. The position of the metal probe 7 is fixed, which can fully utilize the advantages of the electric linear drive device to accurately control the height position of the PCB circuit board 5. The driving source of the electric linear drive device is the electric cylinder 1, which can ensure the accuracy of the height position of the PCB circuit board 5.

[0053] 3. Moreover, the plastic substrate 4 is made of plastic, which is relatively light and reduces the load of the electric linear drive device;

[0054] 4. The cooperation between the guide slide 2 and the outer guide rail 3 is utilized to further ensure the stability and guidance of the lifting track of the PCB circuit board 5, which can meet the needs of large-scale stable detection.

[0055] In order to ensure the diversity of detection items, an anti-disassembly switch 8 is also installed on the upper substrate 6 c so as to contact and detect the anti-disassembly warning element 9 of the PCB circuit board 5 .

[0056] In addition, if Figure 1 , 4 As shown, the control box 12 is still provided with a test result indicator light 12b, a power indicator light 12c, a detection function button 12d, a power consumption test button 12e, and a power-off button 12f. The electric control unit of the control box 12 is provided with an internal ammeter, an external ammeter, a power consumption detection module, a valve detection module, a counter detection module, a communication module, etc., which correspond to the metal probe 7 one by one. The electric control unit is provided with a microcontroller, and the electric control unit is also provided with a power control module connected to the microcontroller, a power consumption detection module, a valve detection module, a counter detection module, and a communication module connected to the microcontroller, and a power-off button, an anti-disassembly switch, a detection function button, a power consumption test button, a power indicator light, and a test result indicator light are all connected to the microcontroller.

[0057] The microcontroller is connected to the control unit of the electric cylinder 1 through a dedicated signal line to control the control process of the electric cylinder 1 . Corresponding control buttons can be arranged on the surface of the control box 12 to control the control process of the electric cylinder 1 .

[0058] It is worth mentioning that the control box 12 may be further reduced to a handheld control terminal in the later stage.

[0059] With respect to the positioning structure on the plastic substrate 4 , the following two embodiments are proposed.

[0060] The configuration scheme of the first embodiment is as follows:

[0061] like Figure 3 , 5 As shown, the positioning structure of the above-mentioned plastic substrate 4 is set as positioning pins 10, and the number of positioning pins 10 is four. The positioning pins 10 are vertically fixedly connected to the upper surface of the plastic substrate 4. When positioning the PCB circuit board 5, the positioning pins 10 are movably plugged into the positioning holes provided by the PCB circuit board 5.

[0062] Since the PCB circuit board 5 is generally rectangular and has four positioning holes (all at right angles), during the process of placing the PCB circuit board 5, the PCB circuit board 5 can be positioned on the plastic substrate 4 by simply making the positioning pins 10 movably engage with the positioning holes of the PCB circuit board 5.

[0063] The configuration scheme of the second embodiment is as follows:

[0064] like Figure 6-8 As shown, the plastic substrate 4 is a rectangular plate structure as a whole, and the positioning structure of the plastic substrate 4 includes:

[0065] A fixed positioning strip 13 in the shape of a strip, which is fixedly connected to the upper surface of the plastic substrate 4, and the fixed positioning strip 13 is parallel to the long side of the plastic substrate 4;

[0066] The bar-shaped adjustable positioning bar 14 is parallel to the fixed positioning bar 13. The adjustable positioning bar 14 is adjustably mounted on the upper surface of the plastic substrate 4, and the adjustment direction is parallel to the short side of the plastic substrate 4. The fixed positioning bar 13 and the adjustable positioning bar 14 are provided with L-shaped cross-section L-shaped positioning grooves 16 parallel to the fixed positioning bar 13 and the adjustable positioning bar 14. When positioning the rectangular PCB circuit board 5, the two opposite sides of the PCB circuit board 5 are respectively placed against the planes of the two L-shaped positioning grooves 16, and respectively against the vertical surfaces of the two L-shaped positioning grooves 16;

[0067] The side positioning plate 15 is perpendicular to the fixed positioning bar 13 and the adjustable positioning bar 14 and contacts one side of the PCB circuit board 5 during positioning.

[0068] The adjustable positioning strip 14 is relatively movable in contact with the upper surface of the plastic substrate 4. Positioning components are installed at both ends of the adjustable positioning strip 14. The two short sides of the plastic substrate 4 are provided with side positioning grooves 4a (such as Figure 8 shown).

[0069] As a preferred structural solution, the position of the adjustable positioning strip 14 can be achieved by a non-screwed manner, and the positioning assembly is configured as an elastic lock structure, which includes:

[0070] A side positioning seat 17, which is fixedly connected to the adjustable positioning strip 14;

[0071] The elastic pin 18 and the spring 19 , the elastic pin 18 is horizontally movable through the side positioning seat 17 through the spring 19 .

[0072] In the second embodiment, when positioning and placing the PCB circuit board 5, it is necessary to pull the adjustable positioning bar 14 outward a little, and make the PCB circuit board 5 stand on the plane of the L-shaped positioning groove 16 of the adjustable positioning bar 14 and the fixed positioning bar 13, so that one side of the PCB circuit board 5 is against the side positioning plate 15, and then the other side of the PCB circuit board 5 is against the vertical surface of the L-shaped positioning groove 16 of the fixed positioning bar 13, so as to limit the PCB circuit board 5 in the XY direction of the plane, and then the operator pulls the elastic pin 18 outward with both hands at the same time, driving the adjustable positioning bar 14 to move toward the PCB circuit board 5, so that the vertical surface of the L-shaped positioning groove 16 of the adjustable positioning bar 14 is against the edge of the PCB circuit board 5, and then releases the hand, so that the two elastic pins 18 are plugged into the side positioning groove 4a under the elastic force of the spring 19, locking the position of the adjustable positioning bar 14, thereby locking the position of the PCB circuit board 5.

[0073] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in the present invention, it should also be noted that the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, or an indirect connection through an intermediate connecting component, and the specific meaning of the terms in the present invention can be understood according to the specific circumstances.

[0074] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0075] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for automatically detecting PCBA, characterized in that: include: A main seat (6) is provided as a C-shaped plate, and its C-shaped cavity is horizontally oriented toward the operator; An electric linear drive device, which is integrally mounted on the bottom of the inner wall of the main seat (6), with its output end located on its upper side, a horizontal plastic substrate (4) being detachably mounted on the upper side of the electric linear drive device, and a positioning structure for positioning a PCB circuit board (5) being mounted on the plastic substrate (4); A plurality of metal probes (7) for contacting and detecting the PCB circuit board (5), wherein the metal probes (7) are fixedly plugged into the top of the main seat (6), and the plastic substrate (4) and the PCB circuit board (5) are located in the C-shaped cavity of the main seat (6) and are located directly below the top of the main seat (6); A control box (12) is connected to the metal probe (7) via an electrical signal line and is separated from the main seat (6). The control box (12) has an electric control unit built in that is connected to the metal probe (7) via an electrical signal line.

2. The device for automatically detecting PCBA according to claim 1, characterized in that: The control box (12) is provided with an interface (12a) electrically connected to its electric control unit, and is provided with a plug (11) docked with the interface (12a); the plug (11) is connected to all metal probes (7) via a plurality of electrical signal lines.

3. The device for automatically detecting PCBA according to claim 1, characterized in that: The main seat (6) is composed of a main body plate (6a) and an upper base plate (6c); the main body plate (6a) is configured as an L-shaped plate as a whole and has a bottom plate portion and a vertical plate portion, and the electric linear drive device is integrally mounted on the bottom plate portion of the main body plate (6a); the upper base plate (6c) is configured as a flat plate structure, and the upper base plate (6c) is detachably fixedly connected to the upper side of the vertical plate portion of the main body plate (6a), and the metal probe (7) is fixedly plugged into the upper base plate (6c).

4. The device for automatically detecting PCBA according to claim 3, characterized in that: The upper side of the vertical plate portion of the main body plate (6a) is bent to form a flat upper bent portion (6b), and the upper bent portion (6b) horizontally supports and is detachably fixedly connected to an upper base plate (6c).

5. The device for automatically detecting PCBA according to claim 1, characterized in that: The electric linear drive device comprises: The electric cylinder (1) has a cylinder barrel fixed to the bottom of the inner wall of the main seat (6) and a telescopic rod facing upward; A guide slide (2) having a horizontal portion and a vertical portion, wherein the horizontal portion of the guide slide (2) is detachably connected to and supports a plastic substrate (4); A vertically extending outer guide rail (3) is fixedly connected to the outer wall of the cylinder barrel of the electric cylinder (1); the vertical portion of the guide slide seat (2) is in lifting and sliding cooperation with the outer guide rail (3).

6. The device for automatically detecting PCBA according to claim 1, characterized in that: The positioning structure of the plastic substrate (4) is provided as positioning pins (10), the number of the positioning pins (10) is at least three, the positioning pins (10) are vertically fixedly connected to the upper surface of the plastic substrate (4), and when positioning the PCB circuit board (5), the positioning pins (10) are movably plugged into the positioning holes provided by the PCB circuit board (5).

7. The device for automatically detecting PCBA according to claim 1, characterized in that: The plastic substrate (4) is a rectangular plate structure as a whole, and the positioning structure of the plastic substrate (4) comprises: A strip-shaped fixed positioning strip (13) fixedly connected to the upper surface of the plastic substrate (4), wherein the fixed positioning strip (13) is parallel to the long side of the plastic substrate (4); A bar-shaped adjustable positioning bar (14) is parallel to the fixed positioning bar (13); the adjustable positioning bar (14) is adjustably mounted on the upper surface of the plastic substrate (4), and the adjustment direction is parallel to the short side of the plastic substrate (4); opposite sides of the fixed positioning bar (13) and the adjustable positioning bar (14) are provided with L-shaped cross-section L-shaped positioning grooves (16) parallel to the fixed positioning bar (13) and used to position the PCB circuit board (5); when positioning the rectangular PCB circuit board (5), two opposite sides of the PCB circuit board (5) are respectively placed against the planes of the two L-shaped positioning grooves (16) and respectively against the vertical surfaces of the two L-shaped positioning grooves (16); A side positioning support plate (15), wherein the side positioning support plate (15) is perpendicular to the fixed positioning strip (13) and the adjustable positioning strip (14), and contacts one side of the PCB circuit board (5) during positioning.

8. The device for automatically detecting PCBA according to claim 7, characterized in that: The adjustable positioning strip (14) is relatively movable in contact with the upper surface of the plastic substrate (4), positioning components are installed at both ends of the adjustable positioning strip (14), and side positioning grooves (4a) extending along the length direction of the plastic substrate (4) and matching with the positioning components are provided on both short sides of the plastic substrate (4); The positioning component comprises: A side positioning seat (17) fixedly connected to the adjustable positioning strip (14); An elastic pin (18) and a spring (19), wherein the elastic pin (18) is horizontally movable through the side positioning seat (17) via the spring (19); when the adjustable positioning strip (14) is locked, the elastic pin (18) is plugged into the side positioning groove (4a) under the elastic force of the spring (19).

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