Quick release device for online PCBA (printed circuit board assembly) burning

Abstract

The invention provides a quick release device for online PCBA burning, and relates to the technical field of PCBA burning, the quick release device comprises a fixing part used for quick release connection with a PCBA, the fixing part comprises a lower fixing part, an upper fixing part and an elastic piece, the upper fixing part is movably connected with the lower fixing part, and the elastic piece is used for enabling one end of the upper fixing part to abut against one end of the lower fixing part. The beneficial effects of the invention are that the assembly and disassembly of the PCBA can be completed by simplifying the assembly and disassembly of the PCBA to pressing-releasing through the elastic clamping structure of the fixing part, and a connecting rod linkage mechanism in the guide structure forces the sliding blocks to always keep equal intervals in the sliding process, so that the test point layouts of different specifications of PCBA can be adaptively matched; multi-variety production can be compatible without replacing tools, and the equipment universality and the field utilization rate are remarkably improved; the probe module can independently slide in or slide out through the sliding clamping matching of the tenon part at the top of the probe and the dovetail groove part of the sliding block, the probe replacement can be quickly completed on the premise of not disassembling the whole device, and the modular maintenance is realized.

Description

Technical Field

[0001] This invention relates to the field of PCBA programming technology, and more particularly to a quick-release device for online PCBA programming. Background Technology

[0002] Currently, PCBA (Printed Circuit Board Assembly) in-circuit programming technology is widely used in the electronics manufacturing industry. Traditional programming methods primarily involve soldering dedicated interfaces onto the PCBA board, connecting it to programming equipment using corresponding wiring harnesses, and then using host computer software to complete the programming. For different models and specifications of PCBA products, production lines typically need to be configured with corresponding programming interfaces and matching wiring harnesses. Common interfaces include standard four-pin and six-pin probe interfaces, as well as special methods that directly clamp the chip pins for programming.

[0003] However, this programming mode, which relies on fixed wire harnesses and soldering interfaces, has significant limitations. On the one hand, when switching between different PCBA products, it is necessary to frequently change the corresponding probe wire harnesses and even redesign the soldering interfaces, resulting in long equipment debugging times and low production efficiency. On the other hand, the diverse probe interfaces and wire harness configurations increase equipment costs and inventory management difficulties, especially when facing the need for direct programming of chip pins, as existing clamping tools have poor compatibility and are difficult to achieve rapid switching and precise docking. Therefore, there is an urgent need for a universal quick-release device that can quickly adapt to multiple programming interfaces to meet the needs of modern flexible production lines. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a quick-release device for online PCBA programming, which solves the technical problem of poor compatibility of existing PCBA programming connection probes.

[0005] Embodiments of the present invention provide a quick-release device for online PCBA programming, comprising: The fixing part includes a lower fixing part, an upper fixing part, and an elastic member. The upper fixing part and the lower fixing part are movably connected. The elastic member is used to make one end of the upper fixing part and the lower fixing part abut against each other. Two pin contacts are respectively disposed on the side surfaces where the upper fixing part and the lower fixing part abut; A pin connector, which is connected to the two pin contacts via two first busbars; Multiple probes are disposed outside the fixing part, each probe penetrates the upper fixing part and abuts against the corresponding lower fixing part, and one end of each probe outside the fixing part is connected to a probe connector via a second busbar. And a guide structure, which is disposed outside the fixing part and connected to each of the probes, the guide structure allowing the multiple probes to adjust the adjacent distance at equal intervals.

[0006] Furthermore, the guide structure includes two positioning blocks, a guide rod, multiple sliders, a mounting block, and a connecting rod structure. The guide rod is connected between the two positioning blocks, and the multiple sliders are penetrated by the guide rod and slidably connected to the guide rod. The mounting block is disposed between the multiple sliders to support the connecting rod structure. The connecting rod structure is connected to each slider, and adjacent sliders slide out. The connecting rod structure can swing to drive adjacent probes to unfold.

[0007] Furthermore, the linkage structure includes multiple swing rods and multiple pivot pins. Adjacent swing rods are connected end to end by the pivot pins. Each slider has a protrusion on its side, and the middle of each swing rod is penetrated by the protrusion, so that each swing rod can rotate relative to the protrusion. The mounting block has a guide groove on its side, and the pivot pin located in the middle of the plurality of swing rods is slidably connected to the guide groove.

[0008] Furthermore, each probe is connected to a connecting block at its end, each connecting block is provided with a tenon on its outer side, and each slider is provided with a dovetail groove on its outer side, wherein the tenon can be slidably connected to the dovetail groove.

[0009] Furthermore, each of the probes has a protruding contact at its lower end for contacting PCBA contacts. A probe groove is provided through the upper fixing part, and each probe passes through the probe groove. A protruding ball is provided on the outside of each probe, and the protruding ball abuts against the probe groove to prevent the probe from coming out of the probe groove. The protruding contact is a flexible part.

[0010] Furthermore, the upper fixing part is provided with a fixing member, the second busbar is connected to the upper fixing part through the fixing member, and the probe connector is connected to the pin connector through a snap-fit ​​structure.

[0011] Furthermore, the snap-fit ​​structure includes a snap-fit ​​frame and an elastic pressure block. An extension groove is provided through the middle of the snap-fit ​​frame, through which the pin connector passes. The elastic pressure block is movably disposed within the extension groove, and the elastic pressure block presses the pin connector against the inner wall of the extension groove.

[0012] Furthermore, the elastic block is connected to one side of the extension groove by a spring, and the width of the elastic block corresponds to the extension groove.

[0013] Furthermore, the pin contact is connected to the two first busbars via wires built into the upper and lower fixing parts, and the probe slot is formed on the side of the pin contact away from the first busbars.

[0014] Furthermore, both the upper fixing part and the lower fixing part extend into an arched structure in the middle, and a pivot is passed through the two arched structures so that the upper fixing part and the lower fixing part can rotate around the pivot. The elastic element and the pin contact are located at the two ends of the pivot, and each pin contact is provided with multiple grooves so that the pin contact and multiple pins can make contact individually.

[0015] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows: The quick-release device for online PCBA programming of the present invention simplifies the loading and unloading of PCBA to a press-and-release action through the elastic clamping structure of the fixing part. The linkage mechanism in the guide structure forces each slider to maintain an equal distance during the sliding process, thereby adaptively matching the test point layout of different PCBA specifications. It can be compatible with multi-variety production without changing tooling, significantly improving the equipment versatility and site utilization. The sliding engagement between the tenon at the top of the probe and the dovetail groove of the slider allows the probe module to slide in or out independently, and the probe can be replaced quickly without disassembling the whole device, realizing modular maintenance, comprehensively reducing production costs and being particularly suitable for the mass production environment of SMT online rapid programming. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the quick-release device for online PCBA programming according to the present invention; Figure 2 This is another structural schematic diagram of the quick-release device for online PCBA programming of the present invention; Figure 3 This is a schematic diagram of the probe structure of the quick-release device for online PCBA programming of the present invention; Figure 4 This is a schematic diagram of the guide structure of the quick-release device for online PCBA programming of the present invention.

[0017] In the diagram: 1. Fixing part; 101. Lower fixing part; 102. Upper fixing part; 103. Rotating shaft; 104. Elastic element; 2. Pin contact; 3. First wire bar; 4. Pin connector; 5. Probe groove; 6. Guide structure; 601. Positioning block; 602. Guide rod; 603. Slider; 604. Mounting block; 605. Protrusion; 606. Swing rod; 607. Shaft pin; 7. Probe; 701. Protruding contact; 702. Protruding ball; 8. Second wire bar; 9. Frame; 10. Probe connector; 11. Connecting block; 12. Tenon; 13. Dovetail groove; 14. Fixing element; 15. Extension groove; 16. Elastic pressure block. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described below with reference to the accompanying drawings. The following description presents a preferred embodiment of the various possible embodiments of the present invention, intended to provide a basic understanding of the invention, but not intended to identify key or decisive elements of the invention or to limit the scope of protection sought.

[0019] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0020] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures. Also, it should be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale.

[0022] In the description of this invention, it should be noted that the circuits, electronic components and modules involved in this invention are all prior art, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the internal structure and method.

[0023] It should be further noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Please refer to Figure 1 The embodiments of the present invention provide a quick-release device for online PCBA programming, including: a fixing part 1, a pin contact 2, a pin connector 4, multiple probes 7 and a guide structure 6, which can realize fast and reliable electrical connection of PCBA and equidistant adaptive adjustment of the spacing between probes 7 to optimize the programming compatibility of different PCBAs.

[0025] In this embodiment, the fixing part 1 is the main load-bearing structure of the device, made of insulating engineering plastic (such as POM), which has excellent mechanical strength and insulation properties. The fixing part 1 includes a lower fixing part 101, an upper fixing part 102, and an elastic member 104, which together form a clamp-type quick-release structure.

[0026] The lower fixing part 101 and the upper fixing part 102 both extend outward from the middle to form symmetrical arched structures. A stainless steel rotating shaft 103 is provided between the two arched structures. The two ends of the rotating shaft 103 are riveted to limit the movement, so that the upper fixing part 102 can rotate and open relative to the lower fixing part 101 around the rotating shaft 103.

[0027] More specifically, the elastic element 104 is a spring, which is located at one end of the upper fixing part 102 and the lower fixing part 101 via spring seats, with its two ends abutting against the spring seats on the inner sidewalls of the upper fixing part 102 and the lower fixing part 101, respectively. The elastic element 104 and the pin contact 2 are located at the two axial ends of the rotating shaft 103, forming a force-saving lever structure, so that the operator only needs to press the tail end of the fixing part to open the front end. After release, the preload of the elastic element 104 causes the clamping ends of the upper fixing part 102 and the lower fixing part 101 to automatically abut.

[0028] Please refer to Figure 2 In this embodiment, the pin contact 2 is made of gold-plated phosphor bronze sheet, and there are two pieces, which are respectively embedded on the clamping end face of the upper fixing part 102 and the lower fixing part 101. Multiple grooves are machined on the inner surface of each pin contact 2 (i.e. the contact surface with the chip pin). The grooves can form multi-point contact with the pin header pins to ensure that each pin is independently conductive.

[0029] Additionally, the pin contact 2 is electrically connected to the first busbar 3 via printed circuit (FPC) wires (not shown in the figure) embedded inside the upper fixing part 102 and the lower fixing part 101. The first busbar 3 is a 20P FFC flexible flat cable, one end of which is electrically connected to the pin contact 2, and the other end is crimped to the corresponding pin of the pin connector 4. The pin connector 4 uses a standard IDC connector, which can be quickly plugged into the corresponding interface of the programmer host.

[0030] like Figure 2 As shown, a probe groove 5 is provided through the clamping end area of ​​the upper fixing part 102, and on the side of the pin contact 2 away from the first line bar 3 (i.e., the front side of the clamping end). A probe 7 is movably inserted into the probe groove 5, and a protruding contact 701 is pressed against the lower end (contact end) of the probe 7. The protruding contact 701 has an umbrella-shaped structure to ensure effective contact with the PCBA test pads and avoid scratching the pads.

[0031] In addition, a convex ball 702 is fitted on the upper part of the probe 7 near the top position through an interference fit. The convex ball 702 is integrally injection molded from POM plastic and forms an interference fit with the inner wall of the probe groove 5. The interference amount is 0.1mm, which ensures that the probe 7 can slide axially and prevents it from falling out of the probe groove 5.

[0032] Thus, when probes 7 are needed, multiple probes 7 can be directly inserted into the fixing part 1 and extended to the clamping part of the upper fixing part 102 and the lower fixing part 101. At this time, the upper fixing part 102 and the lower fixing part 101 abut against each other through probes 7 and the lower fixing part 101, and the PCBA is placed between the multiple probes 7 and the lower fixing part 101 that are opening and closing. Under the elastic force of the elastic member 104, the multiple probes 7 and the PCBA contacts are made to contact.

[0033] Please refer to Figure 3 In this embodiment, the guide structure 6 is integrally disposed on the upper exterior of the fixing part 1, and consists of two positioning blocks 601, a guide rod 602, multiple sliders 603, a mounting block 604, and a connecting rod structure. The two positioning blocks 601 are fixed to the upper surface of the upper fixing part 102 by screws, located at both ends of the probe groove 5 arrangement direction. The guide rod 602 is a linear optical axis, and both ends are locked to the positioning blocks 601 by set screws, parallel to the arrangement direction of the probe groove 5.

[0034] In this embodiment, it is preferred that there are six probes 7 and six sliders 603. All six sliders 603 are made of POM material, with internally nested linear bearings, and are installed on the guide rod 602 to form a low-friction sliding pair. The initial distance between adjacent sliders 603 corresponds to the contact distance of the six-contact PCBA.

[0035] It is worth noting that the mounting block 604 is located at the center of multiple sliders 603 and is fixedly connected to the upper fixing part 102 by screws. A strip-shaped guide groove is provided on its side. The linkage structure consists of multiple swing rods 606 and a pivot pin 607. Adjacent swing rods 606 are hinged end-to-end by the pivot pin 607 to form a telescopic linkage assembly. Each slider 603 has a cylindrical protrusion 605 integrally injection-molded on its side. Each swing rod 606 has a circular hole in its center, through which the protrusion 605 passes, forming a clearance fit, allowing the swing rod 606 to rotate around the protrusion 605. A guide post extends downward from the pivot pin 607 located in the middle of the linkage structure. This guide post inserts into the guide groove of the mounting block 604 to form a sliding fit. A limiting stop is provided at the end of the guide groove to prevent the guide post from slipping out.

[0036] When the outermost slider 603 is manually moved, each slider 603 slides out or retracts under the swinging push of the guide rod 602. The linkage structure forces the spacing of each slider 603 to remain strictly equal through the linkage swing of the swing rod 606, so as to achieve equal spacing adjustment and adapt to the test point layout of different PCBAs.

[0037] For example, by sliding the six sliders 603 to a spacing of 2.54mm, the spacing between the six probes 7 is the same as the spacing between the four contacts, so that the four probes 7 of the six probes 7 correspond to the four contacts of the PCBA and can be used for programming without replacing the PCBA with different contacts.

[0038] like Figure 4 As shown, each probe 7 is connected to a connecting block 11 at its top. A dovetail tenon 12 is machined on the side of the connecting block 11 near the slider 603. A dovetail groove 13 is fixed to the outer side of each slider 603 by screws. The groove size of the dovetail groove 13 is interference-fitted with the tenon 12, allowing the tenon 12 to slide into the dovetail groove 13 from top to bottom for quick assembly. The groove bottom limits further sliding. This mortise and tenon structure allows the probe 7 to move synchronously with the slider 603 and can be quickly slid out for disassembly when the probe 7 needs to be replaced, achieving modular maintenance of the probe 7.

[0039] In an optional embodiment, a nylon fastener 14 is fixed to the upper surface of the upper fixing part 102 by screws. The fastener 14 has a wire hole through which the second cable strip 8 (20P FFC cable) passes and is bound to the surface of the upper fixing part 102 to prevent the cable from becoming tangled. One end of the second cable strip 8 is soldered to the tail end of each probe 7, and the other end is crimped to the probe connector 10. The probe connector 10 is snapped into the pin connector 4.

[0040] like Figure 4 As shown, the pin connector 4 and the probe connector 10 are integrated through a snap-fit ​​structure. The frame 9 is a U-shaped frame made of ABS plastic injection molding, with a rectangular extension groove 15 extending through the middle. The pin connector 4 passes into the extension groove 15, while the second line bus 8 extends upward from both ends of the frame 9 (i.e., bypassing the extension groove 15) and is electrically connected to the probe connector 10.

[0041] A spring mounting hole is provided on one side of the extension groove 15, and a cylindrical helical spring (not shown in the figure) is installed in the hole. The free end of the spring presses against the elastic block 16. The elastic block 16 is a POM block, and its width is clearance-fitted with the width of the extension groove 15. Under the action of the spring, the elastic block 16 elastically presses the pin connector 4 against the inner wall of the other side of the extension groove 15. The housing of the probe connector 10 is integrally formed or glued to the card frame 9. This structure allows the pin connector 4 and the probe connector 10 to be switched to plug into the programming host.

[0042] During operation, press the tail end of the fixing part 1 to open the front end, align the edge pins of the chip to be programmed with the groove of the pin contact 2, release the fixing part 1, and the elastic element 104 drives the upper fixing part 102 and the lower fixing part 101 to clamp, so that the pin contact 2 forms a reliable electrical contact with the chip pins, and connects to the programming host through the first line bar 3 and the pin connector 4 to complete the quick-release connection for chip programming. When PCBA contacts need to be connected, multiple probes 7 are inserted through the tenon 12 and the dovetail grooves 13 of multiple sliders 603, and the protruding ball 702 is pressed through the probe groove 5. At this time, the fixing part 1 clamps the probe 7 by abutting the protruding contact 701 and the lower fixing part 101, placing the PCBA between the protruding contact 701 and the lower fixing part 101, so that each probe 7 effectively contacts the PCBA contact. At the same time, the second line 8 and the probe connector 10 at the other end of the probe 7 complete the connection with the programming host. When different types of contacts need to be contacted, the outermost slider 603 is manually adjusted according to the PCBA test point spacing. The linkage structure is linked to make all probes 7 align with the PCBA test pads at equal intervals, and the protruding contact 701 contacts the contact to form a test circuit. After programming is completed, the PCBA can be quickly removed by pressing the end of the fixing part 1.

[0043] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.

[0044] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick-release device for online PCBA programming, characterized in that, include: The fixing part (1) includes a lower fixing part (101), an upper fixing part (102) and an elastic member (104). The upper fixing part (102) and the lower fixing part (101) are movably connected. The elastic member (104) is used to make one end of the upper fixing part (102) and the lower fixing part (101) abut together. Two pin contacts (2) are respectively disposed on the side surface where the upper fixing part (102) and the lower fixing part (101) abut against each other; The pin connector (4) is connected to the two pin contacts (2) via two first busbars (3); Multiple probes (7) are disposed outside the fixing part (1). Each probe (7) passes through the upper fixing part (102) and abuts against the corresponding lower fixing part (101). One end of each probe (7) located outside the fixing part (1) is connected to a probe connector (10) via a second wire row (8). And a guide structure (6) is disposed outside the fixing part (1) and connected to each of the probes (7), the guide structure (6) allowing the multiple probes (7) to adjust the adjacent distance at equal intervals.

2. The quick-release device for online PCBA programming as described in claim 1, characterized in that: The guide structure (6) includes two positioning blocks (601), a guide rod (602), multiple sliders (603), a mounting block (604), and a connecting rod structure. The guide rod (602) is connected between the two positioning blocks (601). The multiple sliders (603) are penetrated by the guide rod (602) and slidably connected to the guide rod (602). The mounting block (604) is disposed between the multiple sliders (603) to support the connecting rod structure. The connecting rod structure is connected to each slider (603). Two adjacent sliders (603) slide open, and the adjacent probes (7) can be opened by swinging the connecting rod structure.

3. The quick-release device for online PCBA programming as described in claim 2, characterized in that: The linkage structure includes multiple swing rods (606) and multiple pivot pins (607). Adjacent swing rods (606) are connected end to end by the pivot pins (607). Each slider (603) has a protrusion (605) on its side. The middle of each swing rod (606) is penetrated by the protrusion (605) so that each swing rod (606) can rotate relative to the protrusion (605). The mounting block (604) has a guide groove on its side, and the pivot pin (607) located in the middle of the plurality of swing rods (606) is slidably connected to the guide groove.

4. The quick-release device for online PCBA programming as described in claim 2, characterized in that: Each probe (7) is connected to a connecting block (11) at its end. Each connecting block (11) is provided with a tenon (12) on its outer side. Each slider (603) is provided with a dovetail groove (13) on its outer side. The tenon (12) can be slidably connected to the dovetail groove (13).

5. The quick-release device for online PCBA programming as described in claim 1, characterized in that: Each probe (7) has a protruding contact (701) at its lower end for contacting PCBA contacts. The upper fixing part (102) has a probe groove (5) through which each probe (7) passes. Each probe (7) has a protruding ball (702) on its exterior. The protruding ball (702) abuts against the probe groove (5) to prevent the probe (7) from coming out of the probe groove (5). The protruding contact (701) is a flexible part.

6. The quick-release device for online PCBA programming as described in claim 1, characterized in that: The upper fixing part (102) is provided with a fixing member (14), the second line bar (8) is connected to the upper fixing part (102) through the fixing member (14), and the probe connector (10) is connected to the pin connector (4) through a snap-fit ​​structure.

7. The quick-release device for online PCBA programming as described in claim 6, characterized in that: The snap-fit ​​structure includes a snap-fit ​​frame (9) and an elastic pressure block (16). An extension groove (15) is provided through the middle of the snap-fit ​​frame (9). The pin connector (4) passes through the extension groove (15). The elastic pressure block (16) is movably disposed in the extension groove (15). The elastic pressure block (16) squeezes the pin connector (4) against the inner wall of the extension groove (15).

8. The quick-release device for online PCBA programming as described in claim 7, characterized in that: The elastic block (16) is connected to one side of the extension groove (15) by a spring, and the width of the elastic block (16) corresponds to the width of the extension groove (15).

9. The quick-release device for online PCBA programming as described in claim 5, characterized in that: The pin contact (2) is connected to the two first wire rows (3) by wires built into the upper fixing part (102) and the lower fixing part (101), and the probe slot (5) is opened on the side of the pin contact (2) away from the first wire rows (3).

10. The quick-release device for online PCBA programming as described in claim 1, characterized in that: The upper fixing part (102) and the lower fixing part (101) both extend into an arched structure in the middle, and a pivot (103) passes through the two arched structures so that the upper fixing part (102) and the lower fixing part (101) can rotate around the pivot (103). The elastic element (104) and the pin contact (2) are located at the two ends of the pivot (103) respectively, and each pin contact (2) is provided with multiple grooves so that the pin contact (2) and multiple pins can contact each other individually.

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