CN116772679B - Semi-automatic detection tool for multi-surface pin size of LQFP packaging chip - Google Patents
Semi-automatic detection tool for multi-surface pin size of LQFP packaging chip Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 116
- 238000004806 packaging method and process Methods 0.000 title description 9
- 230000000903 blocking effect Effects 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000007906 compression Methods 0.000 claims description 25
- 230000006835 compression Effects 0.000 claims description 24
- 230000009471 action Effects 0.000 claims description 16
- 230000003578 releasing effect Effects 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 2
- 238000009751 slip forming Methods 0.000 claims 1
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Abstract
A semi-automatic detection gauge for the size of a multi-surface pin of an LQFP packaged chip relates to a packaged chip detection technology, comprising: the top surface of the base is provided with a rotary seat, and a concave seat is rotationally arranged on the rotary seat; the rotary seat plate is arranged on the concave seat, the middle part is provided with a vertical through hole, the side surface of the rotary seat plate is provided with a poking groove, the guide rail plate is assembled on the rotary seat plate, the middle part is provided with a vertical through hole, and the top surface of the rotary seat plate is provided with a detection guide rail; the rotating column is in rotating fit with the vertical through hole, the bottom of the rotating column is in contact with the concave seat, and a gear is arranged on the peripheral side of the upper part of the rotating column; one end of the shifting rod penetrates through the shifting groove to be connected with the sliding rod, a rack is arranged on the sliding rod, and the rack is meshed with the gear; the material blocking rod is rotatably connected to the base body at the lower part, and the upper part is positioned above the detection guide rail to block or release the chip which moves to the top surface of the rotary column along the detection guide rail. The detecting tool can detect all pins of the chip, has high efficiency, avoids contacting with detecting personnel when rotating to detect another group of pins, directly completes rotation and detection on the detecting tool, and solves the problem of scrapping in detection.
Description
Technical Field
The application relates to the technical field of chip packaging, in particular to a semi-automatic detection tool for detecting the size of a multi-surface pin of an LQFP packaging chip.
Background
Chip packaging is an important process step of chip forming, and the quality of chip packaging directly influences the use of chips, so that the requirements on the appearance size of the packaged chips are very strict. After the packaging factory finishes the chip packaging, the appearance size of the packaged chip can be detected, for example, whether pins are flatly attached or not is detected, whether the detection span meets the requirements or not is detected, and the like. The detection means is generally to detect by using measuring tools such as a projector, a caliper, a micrometer and the like, and the detection means can detect products with unqualified appearance sizes, but the detection method is time-consuming and labor-consuming, the detection effect is completely dependent on the tolerance and the care of detection personnel, and the detection personnel can easily detect visual fatigue for a long time and is relatively laborious; the chip is small in size, the lead part of the chip circuit is fragile, the chip is damaged by taking the chip with special care, and the chip is packaged in each chip, so that the detection efficiency is low. Meanwhile, the existing chip pin detection device can only detect one group of pin sizes of one chip or only two plastic package forms with pins on opposite sides, and cannot detect products/chips with multiple groups of pins.
Disclosure of Invention
In order to solve the defects of the related prior art, the application provides the semi-automatic detection tool for the size of the pins of the multiple sides of the LQFP packaging chip, which can detect all the pins of the multiple sides of one chip, and directly finish rotation and detection on the detection tool, thereby avoiding direct contact with detection personnel when rotating to detect the other group of pins and solving the problem that the chip is scrapped in the detection process.
In order to achieve the object of the application, the following scheme is adopted:
the utility model provides a semi-automatic detection gauge of LQFP encapsulation chip multiaspect pin size for detect flat subsides and span size of the pin of chip, examine the gauge and include:
a rotary seat is arranged on the top surface of the base, and a concave seat is rotatably arranged on the rotary seat;
the middle part of the rotary seat plate is arranged on the concave seat, the middle part of the rotary seat plate is provided with a vertical through hole, and the side surface of the rotary seat plate is provided with a poking groove which is transversely penetrated;
the guide rail plate is assembled on the rotary seat plate, the middle part of the guide rail plate is provided with a vertical through hole, the top surface of the guide rail plate is provided with a detection guide rail for bearing and conveying chips, two detection channels are arranged on the guide rail plate and are respectively positioned at two sides of the vertical through hole of the guide rail plate, and the detection channels are arranged above the detection guide rail in a crossing manner;
the lower part of the rotating column is in rotating fit with the vertical through holes of the guide rail plate and the rotating seat plate, the bottom of the rotating column is in contact with the concave seat, the periphery of the upper part of the rotating column is provided with a gear, and the top surface of the rotating column is flush with the top surface of the guide rail plate;
one end of the shifting rod penetrates through the shifting groove and then is connected with the sliding rod, the sliding rod is arranged in a moving mode along the direction parallel to the detection guide rail, a rack is arranged on the sliding rod, and the rack is meshed with the gear;
the lower part of the material blocking rod is rotationally connected to a seat body, and the upper part of the material blocking rod is above the detection guide rail and used for blocking or releasing a chip which moves to the top surface of the rotary column along the detection guide rail;
the rotating column is used for rotating under the action of the rack and the gear when the deflector rod moves along the deflector groove so as to rotate the chip positioned on the top surface of the rotating column.
Further, the concave seat top surface is provided with a groove, a concave-convex ring is arranged in the groove, the rotating column is of a hollow cylindrical structure with a sealed top, after assembly, the bottom of the rotating column is contacted with the bottom surface of the groove, and the concave-convex ring is positioned in the rotating column;
the top of the rotating column is provided with 4 strip-shaped guide grooves which are arranged in a circumferential array and vertically communicated, a pair of U-shaped top plates which are arranged in a crisscross manner are arranged in the rotating column, each U-shaped top plate comprises a pair of vertical plates with the upper parts in sliding fit with the strip-shaped guide grooves and a cross rod connected to the bottoms of the pair of vertical plates, and the space between the vertical plates is matched with the width of the detection guide rail; the transverse rod is provided with a vertical spring, the top end of the vertical spring is connected to the inner top wall of the rotating column, and the vertical spring is used for enabling the bottom of the transverse rod to be in contact fit with the curved surface of the top of the concave-convex ring all the time;
the cross rod of one U-shaped top plate is positioned above the other U-shaped top plate, the cross rod positioned above is in a downward U-shaped structure, the middle part of the U-shaped structure is used for arranging the cross rod below, and the two ends of the U-shaped structure are used for being in contact fit with the curved surface of the top of the concave-convex ring;
when the cross rod of one U-shaped top plate contacts with the highest point of the curved surface at the top of the concave-convex ring, the cross rod of the other U-shaped top plate contacts with the lowest point of the curved surface at the top of the concave-convex ring.
Further, the concave-convex ring is internally provided with an eccentric ejector rod, the top of the rotating column is provided with a vertical guide hole positioned at the axis of the rotating column, the vertical guide hole is internally matched with an ejector column which can only move vertically, the lower part of the ejector column passes through the cross bars of the pair of U-shaped top plates to be arranged, and the bottom end of the ejector column is provided with a matched curved surface in contact with the top ends of the ejector rods;
when the cross rod contacts the highest point or the lowest point of the curved surface at the top of the concave-convex ring, the jacking column is at the lowest position under the contact and matching action of the matched curved surface and the top end of the jacking rod, and at the moment, the top surface of the jacking column is not higher than the top surface of the rotating column; when the cross rod is contacted with the middle position between the highest point and the lowest point of the curved surface at the top of the concave-convex ring, the ejector post is at the highest position under the contact and cooperation action of the matched curved surface and the top end of the ejector post, and at the moment, the top surface of the ejector post is higher than the top surface of the rotating post;
the upper side of the rotating column is provided with a rail cover plate, the rail cover plate is arranged on the guide rail plate, an elastic compression bar which stretches vertically is rotationally arranged in the rail cover plate, and when the elastic compression bar is in a natural state, the bottom end of the elastic compression bar is spaced from the top surface of a chip on the rotating column.
Further, in the assembly chamber at rail apron middle part was located to the elastic compression pole, the elastic compression pole includes that the bottom stretches out in assembly chamber, top limit are located the spliced pole in assembly chamber, and the spliced pole top is through pushing down the spring coupling bearing, and bearing normal running fit is in assembly chamber top.
The lower end of the material blocking rod is connected with a variable-diameter guide rod, and the variable-diameter guide rod comprises a large-diameter section connected with the lower end of the material blocking rod, a tension spring groove formed at one end of the large-diameter section and a small-diameter section positioned at the other end of the large-diameter section;
the seat body is arranged in an installation groove of a vertical part of the L-shaped plate, the vertical part of the L-shaped plate is provided with a containing groove for containing the reducing guide rod, a vertical tension spring which is always in an extension state is arranged in the containing groove, and the upper end of the vertical tension spring is connected in the tension spring groove;
the reducing guide rod is parallel to the sliding rod, the sliding rod is vertically connected with a guide sliding column, and the guide sliding column extends into the lower part of the reducing guide rod and is in contact fit with the reducing guide rod.
Further, the vertical portion of L-shaped plate is equipped with a plurality of pairs of slide rails, and the slide bar is fitted in the slide rail, and slide bar one end is connected with the extension spring that resets, and the extension spring that resets is connected at the vertical portion inner wall of L-shaped plate.
The application has the beneficial effects that:
1. and observing whether the chip to be detected and packaged can smoothly slide to the bottom of the right, and the chip which cannot slide to the bottom is an unqualified product. The chip with unqualified package can be detected rapidly and accurately by the detection tool, and the bottom cannot be reached as long as the flat paste and the span size of the pins of the packaged chip are not in accordance with the requirements, so that the detection tool is convenient and simple to detect and is not easy to visually fatigue compared with the existing detection method by using a measuring instrument, a method for rapidly detecting the sizes of the pins of the multiple sides of the chip at one time is realized, and the detection efficiency is greatly improved;
2. in the preferred embodiment of the application, the rotation of the rotating column can be completed through the operation of one deflector rod, the two groups of guide bars turn to the exchange positions, the jacking column jacks up the chip and descends the chip, and the blocking rod releases the blocked chip, so that the operation is simple and convenient; meanwhile, under the action of the reset tension spring, the automatic reset device can automatically reset, and the functions of semi-automatic detection of the detection tool and chip steering are realized;
3. the chip is not interfered when turning, the positioning is accurate, the rotation and detection are directly finished on the detection tool, the direct contact with a detection person during the rotation detection of another group of pins is avoided, and the problem that the chip is scrapped in the detection process is solved;
4. the internal structural design of the rotary column is ingenious, the concave-convex rings and the ejector rods are matched, the two U-shaped top plates can rotate along with and can be lifted up and down interchangeably when the rotary column body rotates, so that the two groups of guide bars are interchanged and are parallel to the detection guide rail, the lifting and lowering process of the ejector column is realized simultaneously, and the rotary column is high in practicability and can be applied to other scenes in which the chip needs to be rotated.
Drawings
Fig. 1 shows a schematic structural diagram of an LQFP package chip for inspection according to an embodiment of the present application.
Fig. 2 is a schematic diagram showing an assembled state of the whole structure of the gauge according to the embodiment of the application.
FIG. 3 shows a schematic diagram of the structure of a swivel base and a concave base according to an embodiment of the application.
Fig. 4 shows an exploded structure schematic view of an L-shaped plate, a rotating seat plate, a rotating column, a guide rail plate, a rail cover plate and an elastic compression bar according to an embodiment of the present application.
Fig. 5 shows an exploded structure schematic view of an L-shaped plate, a deflector rod, a sliding rod and a blocking rod according to an embodiment of the present application.
Fig. 6 shows a schematic view of a material blocking rod structure according to an embodiment of the application.
Fig. 7 shows a schematic diagram of an assembly structure of a material blocking rod, a guide strut and a seat body according to an embodiment of the present application.
Fig. 8 shows a schematic view of the structure of the bottom side view of the track cover plate according to the embodiment of the application.
Fig. 9 shows a schematic diagram of an assembly structure of a concave seat, a rotary column and a rack according to an embodiment of the present application.
Fig. 10 is a schematic perspective view showing an assembly structure of a concave-convex ring, a U-shaped top plate, and a top column according to an embodiment of the present application.
Fig. 11 is a schematic top view showing an assembly structure of a concave-convex ring, a U-shaped top plate and a top column according to an embodiment of the present application.
Fig. 12 shows a sectional view of an assembled structure of a U-shaped top plate, a top column, a rotary column, and a concave-convex ring according to an embodiment of the present application.
Fig. 13 is a schematic side view showing the overall structure of the gauge according to the embodiment of the present application when applied.
Fig. 14 shows an enlarged view of the portion a in fig. 13.
FIG. 15 shows a schematic cross-sectional view of a detection channel according to an embodiment of the present application.
Reference numerals:
1-a base and 11-a rotary seat;
2-concave seats, 21-grooves, 22-concave-convex rings and 23-ejector rods;
3-L-shaped plates, 30-accommodating grooves, 31-mounting grooves and 32-seat bodies;
4-rotating seat boards, 40-rectangular assembly grooves, 41-toggle grooves, 42-rotating columns, 421-gears, 422-bar-shaped guide grooves, 423-vertical guide holes, 43-U-shaped top boards, 431-vertical boards, 432-cross bars, 433-vertical springs, 434-guide bars, 44-jacking columns and 441-matched curved surfaces;
5-guide rail plates, 50-detection guide rails, 51-front section plates, 52-middle plates, 53-rear section plates, 54-handles, 55-upper limiting blocks, 56-lower limiting blocks, 57-detection channels and 58-limiting pressing strips;
6-rail cover plate, 60-cross groove, 61-elastic compression bar, 62-accommodating groove, 611-compression column, 612-pressing spring; 613-bearings;
7-deflector rod, 71-sliding rod, 72-sliding rail, 73-reset tension spring, 74-rack and 75-guiding sliding column;
8-material blocking rods, 80-convex parts, 81-bolts, 82-pin holes, 83-variable-diameter guide rods, 831-small-diameter sections, 832-large-diameter sections, 833-tension spring grooves and 84-vertical tension springs;
9-chip.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of the embodiments of the present application will be given with reference to the accompanying drawings, but the described embodiments of the present application are some, but not all embodiments of the present application.
The embodiment of the application provides a semi-automatic detection tool for detecting the sizes of pins on multiple sides of an LQFP (Linear quad Flat No-lead) packaged chip, which is used for detecting the flat paste and the span sizes of pins, as shown in fig. 1, which is a chip 9 to be detected in the embodiment, the chip can be seen to be a package body with pins on four sides, the number of the pins on four sides is equal, and the chip is in a square structure. In particular, in the detection, the detection tool of the embodiment can utilize the gap between the plastic package body of the chip 9 and the pins to limit, bear and convey, detect, control steering and the like the chip 9, so as to realize the detection of the appearance of the pins on two groups of opposite sides in sequence.
As shown in fig. 2, 4 and 5, the gauge of the present example includes a base 1, a concave seat 2, a rotary seat plate 4, a rotary column 42, a guide rail plate 5, a shift lever 7, a stop lever 8, and the like.
The top surface of the base 1 is provided with a rotary seat 11, and a concave seat 2 is rotatably arranged on the rotary seat 11. The middle part of the rotary seat board 4 is arranged on the concave seat 2, the middle part of the rotary seat board 4 is provided with a vertical through hole, and the side surface is provided with a poking groove 41 which is transversely penetrated.
The guide rail plate 5 is assembled on the rotary seat plate 4, the middle part of the guide rail plate is provided with a vertical through hole, and the top surface of the guide rail plate is provided with a detection guide rail 50 for bearing and conveying the chip 9; specifically, during conveying, two rail walls of the detection guide rail 50 are respectively located in the areas between the two sides of the plastic package body of the chip 9 and the pins on the two sides. On the guide rail plate 5, a detection channel 57 is respectively provided on the sections of the guide rail plate 5 located at both sides of the vertical through hole, the detection channel 57 is straddled on the detection guide rail 50, specifically, the inner side wall of the detection channel 57 is provided with a shape matching with the normal/qualified pin size and shape, as shown in fig. 15, for passing through the chip 9 with normal pin size and shape, and when the pin is abnormal, such as overlong or deformed in a bending shape, such chip 9 will be blocked by the detection channel 57 and cannot enter and pass through the detection channel 57.
The lower part of the rotary column 42 is in rotary fit with the vertical through holes of the guide rail plate 5 and the rotary seat plate 4, the bottom is in contact with the concave seat 2, the periphery of the upper part is provided with a gear 421, and the top surface is flush with the top surface of the guide rail plate 5; one end of the deflector rod 7 passes through the deflector groove 41 and is connected with the sliding rod 71, the sliding rod 71 is movably arranged along the direction parallel to the detection guide rail 50, the sliding rod 71 is provided with a rack 74, and the rack 74 is meshed with the gear 421; the lower part of the material blocking rod 8 is rotatably connected to a base 32, and the upper part of the material blocking rod is above the detection guide rail 50, so that the material blocking rod 8 can block or release the chip 9 travelling to the top surface of the rotary column 42 along the detection guide rail 50 through rotation.
When the shift lever 7 moves along the shift groove 41, the rotary column 42 rotates under the action of the rack 74 and the gear 421, and the chip 9 located on the top surface of the rotary column 42 can be rotated. By setting the travel distance of the shift lever 7 in the shift groove 41, the rotation of the rotation post 42 can be controlled to 90 °, so that the chip 9 can be rotated by 90 °.
During detection, the chip 9 is placed on a detection guide rail 50 at the left end of the guide rail plate 5 to bear and prepare for conveying, and the material blocking rod 8 is in a blocking state; as shown in fig. 13, the rotating seat board 4 and the guide rail board 5 are inclined to rotate downwards to the right to form a gradient, the chip 9 slides downwards along the detection guide rail 50 under the action of gravity, if pins on two sides currently carried by the detection guide rail 50 are qualified/normal, as shown in fig. 15, the chip 9 smoothly passes through the first detection channel 57, then enters the rotating column 42 and is blocked by the material blocking rod 8; the rotating seat board 4 and the guide rail board 5 can be rotated to a horizontal state, the material blocking rod 8 is released, then the material blocking rod 7 moves in the poking groove 41, so that the rack 74 moves along with the sliding rod 71 to drive the meshed gear 421 to rotate, thereby driving the rotating column 42 to rotate so as to rotate the chip 9 by 90 degrees, and then the rotating seat board 4 and the guide rail board 5 are inclined to rotate downwards to form a gradient, the chip 9 continues to slide downwards along the subsequent detection guide rail 50 under the action of gravity, and if pins on the other two sides currently carried by the detection guide rail 50 are qualified/normal, as shown in fig. 15, the chip 9 smoothly passes through the second detection channel 57, and the detection is completed. If there is an abnormality in the corresponding side pins in one of the direction states, it is blocked at least at one of the detection channels 57. Then resetting the concave seat 2, the deflector rod 7, the material blocking rod 8 and the like, and detecting the next chip 9 can be started.
As a preferred implementation manner of the present embodiment, in order to improve continuity of operation actions, the following further preferred scheme is adopted:
as shown in fig. 3, a groove 21 is formed on the top surface of the concave-shaped seat 2, a concave-convex ring 22 is arranged in the groove 21, and the concave-convex ring 22 is fixedly arranged and can not rotate.
As shown in fig. 9 and 12, the rotating post 42 has a hollow cylindrical structure with a sealed top, and after assembly, the bottom of the rotating post 42 contacts the bottom surface of the groove 21, and the concave-convex ring 22 is located in the rotating post 42. The top of the rotating column 42 is provided with 4 strip-shaped guide grooves 422 which are arranged in a circumferential array and vertically penetrate through.
As shown in fig. 10 to 12, a pair of U-shaped top plates 43 are provided inside the rotating column 42 in a crisscross arrangement, the U-shaped top plates 43 include a pair of risers 431 having upper portions slidably fitted in the bar-shaped guide grooves 422 and a cross bar 432 connected to the bottoms of the pair of risers 431, and the interval between the risers 431 matches the width of the detection rail 50; the top of the vertical plate 431 is provided with a guide bar 434 matched with the detection guide rail 50, and the guide bar 434 is used for extending between two sides of the plastic package body of the chip 9 and corresponding pins when acting on the chip 9, so that the stability of the chip 9 during rotation is improved, and the rotation is also convenient for carrying the chip with the detection guide rail 50 before and after rotation.
The crossbar 432 is provided with a vertical spring 433, the top end of the vertical spring 433 is connected to the inner top wall of the rotary column 42, and the vertical spring 433 is used for enabling the bottom of the crossbar 432 to be in contact fit with the curved surface of the top of the concave-convex ring 22 all the time.
Considering the layout of a narrow space and the condition of avoiding interference, arranging the cross bars 432 of one U-shaped top plate 43 to be positioned above the cross bars 432 of the other U-shaped top plate 43, wherein the cross bars 432 positioned above are designed to be of a U-shaped structure with downward openings, the middle part of the U-shaped structure is used for arranging the cross bars 432 below, and the two ends of the U-shaped structure are used for being in contact fit with the curved surfaces at the tops of the concave-convex rings 22; when the crossbar 432 of one of the U-shaped top plates 43 contacts the highest point of the curved surface at the top of the concave-convex ring 22, the crossbar 432 of the other U-shaped top plate 43 contacts the lowest point of the curved surface at the top of the concave-convex ring 22. At this time, the two crossbars 432 do not interfere with each other, and after the high and low states of the two U-shaped top plates 43 are interchanged, the two crossbars 432 do not interfere with each other in space, so that the stable and effective operation of the rotation column 42 and its internal structure can be maintained. Since the two U-shaped top plates 43 are disposed in a crisscross arrangement, it can be confirmed that the high and low states of the two U-shaped top plates 43 are interchanged once every 90 ° of rotation of the rotation post 42. When the U-shaped top plate 43 is at the highest point, the guide bar 434 thereon extends out of the top surface of the rotating post 42.
Before rotation, one of the U-shaped top plates 43 is located at the highest point, the guide bar 434 of the U-shaped top plate 43 is located above the top surface of the rotating column 42 and parallel to the detection guide rail 50, and when the chip 9 enters the rotating column 42 after passing through the first detection channel 57 and is blocked by the blocking rod 8, the guide bar 434 located above the top surface of the rotating column 42 is limited between the plastic package body and the pins at the corresponding side; when the rotating column 42 rotates under the action of the rack 74 and the gear 421, the two U-shaped top plates 43 therein rotate together with the rotating column 42; when the die rotates, the cross bars 432 are kept in contact with the concave-convex ring 22, but because the curved surface of the top surface of the concave-convex ring 22 is concave-convex, when the die rotates by 90 degrees, the cross bars 432 originally positioned at a high point are rotated to a low point, the cross bars 432 originally positioned at a low point are rotated to a high point, and the corresponding U-shaped top plates 43 are exchanged in high and low states, namely, when the guide bars 434 originally extending out of the top surface of the rotating post 42 rotate by 90 degrees, the guide bars 434 originally extending out of the top surface of the rotating post 42 also fall below the top surface of the rotating post 42, reach the position parallel to the detection guide rail 50, are higher than the top surface of the rotating post 42, and are limited between the other two sides of the plastic package body after the die 9 rotates and pins on the corresponding sides, so that the die is convenient to be connected with the subsequent detection guide rail 50, and the pins on the other two sides can be conveniently detected.
As a further preferred solution, as shown in fig. 3, 10 and 12, the concave-convex ring 22 is provided with an eccentric ejector rod 23, the top of the rotating column 42 is provided with a vertical guide hole 423 located at the axis of the rotating column and vertically penetrating, the vertical guide hole 423 is internally matched with a jack 44 which can only move vertically, specifically, the jack 44 can be provided with a non-cylindrical shape, such as a square shape or other polygonal shape, and the shape of the vertical guide hole 423 is matched with that of the jack 44, so that when the rotating column 42 rotates, the jack 44 rotates together. The lower portion of the ejector pin 44 is disposed through the cross bars 432 of the pair of U-shaped top plates 43, and the bottom end has a fitting curved surface 441 in contact with the top end of the ejector pin 23. In order to facilitate the better cooperation between the ejector rod 23 and the ejector column 44, the top end of the ejector rod 23 can be designed into an arc surface or embedded with a rolling ball, so that friction force can be reduced during cooperation, and point contact is facilitated.
When one of the crossbars 432 contacts the highest point of the curved surface at the top of the concave-convex ring 22 and the other crossbar 432 contacts the lowest point of the curved surface at the top of the concave-convex ring 22, the top post 44 is at the lowest position under the contact cooperation action of the mating curved surface 441 and the top end of the top post 23, and at this time, the top surface of the top post 44 is not higher than the top surface of the rotating post 42; when the two crossbars 432 are just contacted with the middle position between the highest point and the lowest point of the curved surface at the top of the concave-convex ring 22, the ejector post 44 is at the highest position under the contact and matching action of the matched curved surface 441 and the top end of the ejector rod 23, at this time, the top surface of the ejector post 44 is higher than the top surface of the rotating post 42, and if the chip 9 is arranged on the rotating post 42, the chip 9 can be lifted up.
The upper side of the rotating column 42 is provided with a rail cover plate 6, the rail cover plate 6 is arranged on the guide rail plate 5, an elastic pressing rod 61 stretching vertically is rotationally arranged in the rail cover plate 6, and when the elastic pressing rod 61 is in a natural state, the bottom end of the elastic pressing rod 61 is spaced from the top surface of the chip 9 on the rotating column 42.
When the chip 9 is lifted up by the jack post 44 by a certain height, the top surface of the chip 9 will be abutted to the bottom end of the elastic compression bar 61, and the chip 9 is kept relatively stable between the jack post 44 and the elastic compression bar 61 under the action of the restoring force of the elastic compression bar 61. The top post 44 rotates along with the rotating post 42, and according to the structure and the matching relation described above, when the rotating post 42 rotates 90 degrees, the top post 44 rises to the highest position and then descends to the lowest position, wherein when the top post 44 reaches the highest position, the top post 44 rotates 45 degrees approximately corresponding to the rotating post 42, and returns to the lowest position when the top post rotates 90 degrees; the elastic compression bar 61 is rotatable, so when the rotation column 42 is utilized to rotate the chip 9, the chip 9 is jacked up through the jacking column 44 rotating along with the rotation column 42, the chip 9 is rotated in a state of clamping the chip 9 together with the elastic compression bar 61, meanwhile, the elastic compression bar 61 rotates along with the rotation column 42, after the rotation is completed, the jacking column 44 is reset to the lowest position, the top surface of the chip 9 also loses the downward pressing force of the elastic compression bar 61, the chip 9 continuously slides down on the inclined guide rail plate 5 in the rotated posture, and the chip 9 is rotated while the rotation seat plate 4 and the guide rail plate 5 are in the rightward and downward inclined state, and the movement of releasing, rotating, jacking and descending and then sliding down is continuous and effective while the material blocking bar 8 is started; the chip 9 will not slide down directly due to the blocking limitation of the blocking rod 8 in the rotation process, but after the rotation, the chip 9 is lowered to contact with the rotating column 42 along with the top column 44, the elastic compression rod 61 is lost, and at this time, the conducting bars 434 of the other two U-shaped top plates 43 slide down to the subsequent detecting guide rail 50 after being limited between the plastic package body and the pins again, thereby improving the continuity of the operation process.
Specifically, as shown in fig. 14, the elastic compression bar 61 is disposed in the assembly cavity in the middle of the rail cover plate 6, the elastic compression bar 61 includes a compression column 611 with its bottom extending from the assembly cavity and its top limited in the assembly cavity, the top of the compression column 611 is connected to a bearing 613 by a pressing spring 612, and the bearing 613 is in running fit with the top of the assembly cavity. Specifically, the top of the pressing post 611 can be designed to be in contact fit with the inner wall of the assembly cavity, so that the lifting stability of the pressing post 611 can be maintained.
As a more preferred embodiment, in order to link the rotation of the blocking lever 8 and the blocking and releasing actions of the chip 9, the rotation of the blocking lever 8 and the rotation of the rotation column 42 are linked, and the following detailed scheme is adopted:
as shown in fig. 8, the bottom of the rail cover plate 6 is concaved inwards to form a cross groove 60, two notches of the cross groove 60 horizontally penetrate through the rail cover plate 6 so that the chip 9 enters the rail cover plate 6 along with the detection guide rail 50, the other notch of the cross groove 60 facing the direction of the material blocking rod 8 is also horizontally penetrated through the rail cover plate 6, meanwhile, one side of the rail cover plate 6 facing the material blocking rod 8 is provided with a containing groove 62, and the containing groove 62 is continuously concavely formed from the cross groove 60 and used for containing the upper part of the material blocking rod 8 and providing a rotating space for the upper part of the material blocking rod 8.
Specifically, as shown in fig. 6, a pin hole 82 is formed at the lower part of the material blocking rod 8, and a convex part 80 is formed at the side of the upper part facing the chip 9 for contacting with the plastic package body of the chip 9 to form a block; the lower end of the material blocking rod 8 is connected with a reducing guide rod 83, and the reducing guide rod 83 comprises a large-diameter section 832 connected with the lower end of the material blocking rod 8, a tension spring groove 833 formed at one end of the large-diameter section 832, and a small-diameter section 831 positioned at the other end of the large-diameter section 832.
Referring to fig. 1 and 5 to 7, the stopper rod 8 is rotatably mounted on the base 32 by inserting a pin 81 into a pin hole 82. The seat 32 is installed in the mounting groove 31 of the vertical part of an L-shaped plate 3, the vertical part of the L-shaped plate 3 is provided with a containing groove 30 for containing the reducing guide rod 83, and the containing groove 30 is internally provided with a vertical tension spring 84 which is always in an extension state and is used for keeping downward tension on the reducing guide rod 83. The upper end of the vertical tension spring 84 is connected in the tension spring groove 833; the reducing guide rod 83 is parallel to the sliding rod 71, the sliding rod 71 is vertically connected with a guide sliding column 75, and the guide sliding column 75 extends into the lower part of the reducing guide rod 83 and is in contact fit with the reducing guide rod 83.
When the shift lever 7 is shifted to move in the shift groove 41, not only the rotation of the rotating column 42 is realized through the sliding lever 71 and the rack 74, but also the guide sliding column 75 moving along with the sliding lever 71 moves to the position contacting the large diameter section 832 of the reducing guide rod 83 initially to the position contacting the small diameter section 831, and the reducing guide rod 83 is pulled down due to the downward pulling force of the vertical tension spring 84, so that the lower end of the material blocking rod 8 is pulled down and rotated, the upper part of the material blocking rod 8 is rotated upwards, and the convex part 80 loses the effect on the chip 9, thereby realizing linkage. The linkage has the significance that when the rotating column 42 rotates the chip 9, the chip 9 is jacked by the jacking column 44 to be contacted with the elastic compression rod 61, and then the blocking rod 8 is contacted to block the chip 9, so that the interchange of the guide strip 434 on the rotating column 42, the rotation of the chip 9 and the rotation of the blocking rod 8 are realized by one action, and the operation by operators is facilitated.
Specifically, for the assembly gauge of being convenient for, as shown in fig. 2, 4, can be with the horizontal portion middle part fretwork of L template 3, the anterior segment and the back end of rotatory bedplate 4 are installed in the horizontal portion non-fretwork department of L template 3, and fretwork department is used for holding concave seat 2.
As a further preferable embodiment, in order to realize automatic resetting of the shift lever 7, the stopper lever 8, the rotation column 42, etc., as shown in fig. 2 and 5, one end of the slide lever 71 is connected with a reset tension spring 73, and the reset tension spring 73 is connected to the inner wall of the vertical portion of the L-shaped plate 3. When the shift lever 7 moves with the sliding lever 71, the shift lever 7 is released, and the return tension spring 73 can act on the sliding lever 71 to move in the direction, so that the shift lever 7, the material blocking lever 8, the rotary column 42 and the like are reset.
In order to improve the stability and alignment of the movement of the slide bar 71, a plurality of pairs of slide rails 72 may be provided at the vertical portion of the L-shaped plate 3, so that the slide bar 71 is fitted into the slide rails 72.
As one of the specific embodiments of the guide rail plate 5, as shown in fig. 4, the detection guide rail 50 is provided along the length direction of the guide rail plate 5, the guide rail plate 5 includes a front stage plate 51, a middle plate 52, and a rear stage plate 53, and the vertical through hole of the guide rail plate 5 is located on the middle plate 52 and matches with the vertical through hole of the rotating seat plate 4. The middle part of the rotary seat plate 4 is concavely formed with a rectangular fitting groove 40, a vertical through hole is provided in the rectangular fitting groove 40, and a middle plate 52 is fitted in the rectangular fitting groove 40, and a front plate 51 and a rear plate 53 are respectively fitted on the rotary seat plate 4 on both sides of the rectangular fitting groove 40.
The outer side end of the front section plate 51 is provided with an upper limiting block 55, the outer side end of the rear section plate 53 is provided with a lower limiting block 56, the upper limiting block 55 and the lower limiting block 56 are both positioned in the detection guide rail 50, and the chips 9 positioned at two ends of the detection guide rail 50 can be limited.
The rail cover plate 6 is provided on the intermediate plate 52. The middle plate 52 is not provided with the detection guide rail 50, because the chip 9 can be limited by the cross groove of the rail cover plate 6 when entering the middle plate 52, and rotation interference can be avoided without the detection guide rail 50; of course, a section of detection guide rail 50 may be provided, and the detection guide rail 50 may extend to the periphery of the rotation track of the chip 9, so that the chip 9 may rotate without interfering with the detection guide rail 50, and the width of the cross groove may be correspondingly adjusted, so that the detection guide rail can be flexibly configured according to the application situation.
The detection channels 57 are respectively arranged on the front section plate 51 and the rear section plate 53, and the detection channels 57 are respectively provided with a limiting pressing bar 58, as shown in fig. 4 and 13, for limiting the top surface of the chip 9 in the detection guide rail 50.
In order to facilitate deflection of the concave seat 2, the rotary seat plate 4 and the guide rail plate 5, handles 54 may be provided at outer end portions of the front and rear plates 51 and 53, so that an operator can perform a rotation operation by operating the handles 54 to make the guide rail plate 5 in an inclined state.
In order to enhance the rotation effect of the rotation post 42, bearings may be disposed on the circumferential side of the rotation post 42 so that the outer wall of the rotation post 42 contacts the outer wall of the bearings, which may be rotatably provided in the middle portion of the rotation seat plate 4 or on the intermediate plate 52.
The foregoing description of the preferred embodiments of the application is merely exemplary and is not intended to be exhaustive or limiting of the application. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the application.
Claims (10)
1. The utility model provides a semi-automatic detection utensil of LQFP encapsulation chip multiaspect pin size which characterized in that includes:
a rotary seat (11) is arranged on the top surface of the base (1), and a concave seat (2) is rotatably arranged on the rotary seat (11);
the middle part of the rotary seat board (4) is arranged on the concave seat (2), the middle part of the rotary seat board (4) is provided with a vertical through hole, and the side surface of the rotary seat board is provided with a poking groove (41) which is transversely penetrated;
the guide rail plate (5) is assembled on the rotary seat plate (4), a vertical through hole is formed in the middle of the guide rail plate (5), a detection guide rail (50) is arranged on the top surface of the guide rail plate and used for bearing and conveying the chip (9), two detection channels (57) are arranged on the guide rail plate (5) and are respectively positioned on two sides of the vertical through hole of the guide rail plate (5), and the detection channels (57) are arranged above the detection guide rail (50) in a crossing mode;
the lower part of the rotating column (42) is in rotating fit with the vertical through hole of the guide rail plate (5) and the vertical through hole of the rotating seat plate (4), the bottom of the rotating column is in contact with the concave seat (2), the periphery of the upper part of the rotating column is provided with a gear (421), and the top surface of the rotating column is flush with the top surface of the guide rail plate (5);
one end of the shifting lever (7) penetrates through the shifting groove (41) and then is connected with a sliding lever (71), the sliding lever (71) is arranged in a moving mode along the direction parallel to the detection guide rail (50), a rack (74) is arranged on the sliding lever (71), and the rack (74) is meshed with the gear (421);
the lower part of the material blocking rod (8) is rotatably connected to a seat body (32), and the upper part of the material blocking rod is positioned above the detection guide rail (50) and used for blocking or releasing a chip (9) travelling to the top surface of the rotary column (42) along the detection guide rail (50);
the rotating column (42) is used for rotating under the action of the rack (74) and the gear (421) when the deflector rod (7) moves along the deflector groove (41) so as to rotate the chip (9) positioned on the top surface of the rotating column (42).
2. The semi-automatic detection tool for the size of the multi-face pins of the LQFP packaged chip according to claim 1 is characterized in that the top surface of the concave seat (2) is provided with a groove (21), a concave-convex ring (22) is arranged in the groove (21), the rotating column (42) is of a hollow cylindrical structure with a sealed top, after assembly, the bottom of the rotating column (42) is in contact with the bottom surface of the groove (21), and the concave-convex ring (22) is positioned in the rotating column (42);
the top of the rotating column (42) is provided with 4 strip-shaped guide grooves (422) which are arranged in a circumferential array and vertically communicated, a pair of U-shaped top plates (43) which are arranged in a crisscross manner are arranged in the rotating column (42), the U-shaped top plates (43) comprise a pair of vertical plates (431) with the upper parts being in sliding fit with the strip-shaped guide grooves (422) and transverse rods (432) connected to the bottoms of the pair of vertical plates (431), and the space between the vertical plates (431) is matched with the width of the detection guide rail (50); the vertical springs (433) are arranged on the cross rods (432), the top ends of the vertical springs (433) are connected to the inner top wall of the rotating column (42), and the vertical springs (433) are used for enabling the bottoms of the cross rods (432) to be in contact fit with the curved surfaces of the tops of the concave-convex rings (22) all the time;
the cross rod (432) of one U-shaped top plate (43) is positioned above the other, the cross rod (432) positioned above is of a downward U-shaped structure, the middle part of the U-shaped structure is used for being arranged by the cross rod (432) positioned below, and two ends of the U-shaped structure are used for being in contact fit with the curved surface at the top of the concave-convex ring (22);
when the cross bar (432) of one U-shaped top plate (43) contacts with the highest point of the curved surface at the top of the concave-convex ring (22), the cross bar (432) of the other U-shaped top plate (43) contacts with the lowest point of the curved surface at the top of the concave-convex ring (22).
3. The LQFP packaged chip multi-surface pin size semi-automatic detection tool according to claim 2, wherein the concave-convex ring (22) is internally provided with an eccentric ejector rod (23), the top of the rotating column (42) is provided with a vertical guide hole (423) positioned at the axis of the rotating column, the vertical guide hole (423) is internally matched with a top column (44) which can only move vertically, the lower part of the top column (44) passes through a cross rod (432) of the pair of U-shaped top plates (43) to be arranged, and the bottom end of the top column is provided with a matched curved surface (441) in contact fit with the top ends of the ejector rods (23);
when the cross rod (432) contacts with the highest point or the lowest point of the curved surface at the top of the concave-convex ring (22), the jacking column (44) is at the lowest position under the contact and matching action of the matched curved surface (441) and the top end of the jacking rod (23), and at the moment, the top surface of the jacking column (44) is not higher than the top surface of the rotating column (42); when the cross rod (432) is contacted with the middle position between the highest point and the lowest point of the curved surface at the top of the concave-convex ring (22), the jacking column (44) is at the highest position under the contact and matching action of the matched curved surface (441) and the top end of the jacking rod (23), and at the moment, the top surface of the jacking column (44) is higher than the top surface of the rotating column (42);
the upper side of the rotating column (42) is provided with a rail cover plate (6), the rail cover plate (6) is arranged on the guide rail plate (5), an elastic pressing rod (61) which stretches vertically is rotationally arranged in the rail cover plate (6), and when the elastic pressing rod (61) is in a natural state, the bottom end of the elastic pressing rod is spaced from the top surface of a chip (9) on the rotating column (42).
4. The LQFP packaged chip multi-surface pin size semiautomatic detection tool according to claim 3, wherein the bottom of the rail cover plate (6) has a cross groove (60), one side of the rail cover plate (6) facing the material blocking rod (8) has a receiving groove (62), and the receiving groove (62) is continuously formed in a concave manner from the cross groove (60) for receiving the upper part of the material blocking rod (8) and providing a rotation space for the upper part of the material blocking rod (8).
5. The LQFP packaged chip multi-surface pin size semi-automatic detection tool according to claim 3, wherein the elastic compression bar (61) is arranged in the assembly cavity in the middle of the rail cover plate (6), the elastic compression bar comprises a compression column (611) with the bottom extending out of the assembly cavity and the top limited in the assembly cavity, the top of the compression column (611) is connected with the bearing (613) through a pressing spring (612), and the bearing (613) is in running fit with the top of the assembly cavity.
6. The LQFP packaged chip multi-surface pin size semi-automatic detection tool according to claim 1, wherein the lower end of the material blocking rod (8) is connected with a reducing guide rod (83), and the reducing guide rod (83) comprises a large-diameter section (832) connected with the lower end of the material blocking rod (8), a tension spring groove (833) formed at one end of the large-diameter section (832), and a small-diameter section (831) positioned at the other end of the large-diameter section (832);
the seat body (32) is arranged in the mounting groove (31) of the vertical part of one L-shaped plate (3), the vertical part of the L-shaped plate (3) is provided with a containing groove (30) for containing the reducing guide rod (83), the containing groove (30) is internally provided with a vertical tension spring (84) which is always in an extension state, and the upper end of the vertical tension spring (84) is connected in the tension spring groove (833);
the reducing guide rod (83) is parallel to the sliding rod (71), the sliding rod (71) is vertically connected with a guide sliding column (75), and the guide sliding column (75) stretches into the lower part of the reducing guide rod (83) and is in contact fit with the reducing guide rod (83).
7. The LQFP packaged chip multi-surface pin size semi-automatic detection tool according to claim 6, wherein a plurality of pairs of slide rails (72) are arranged at the vertical part of the L-shaped board (3), a slide rod (71) is matched in the slide rails (72), one end of the slide rod (71) is connected with a reset tension spring (73), and the reset tension spring (73) is connected to the inner wall of the vertical part of the L-shaped board (3).
8. The LQFP packaged chip multi-surface pin size semi-automatic detection tool according to claim 6, wherein the middle part of the transverse part of the L-shaped board (3) is hollowed out, the front section and the rear section of the rotary seat board (4) are arranged at the non-hollowed-out part of the transverse part of the L-shaped board (3), and the hollowed-out part is used for accommodating the concave seat (2).
9. The LQFP packaged chip multi-surface pin size semiautomatic detection tool according to claim 1, wherein the detection guide rail (50) is arranged along the length direction of the guide rail plate (5), the guide rail plate (5) comprises a front section plate (51), a middle plate (52) and a rear section plate (53), and the vertical through hole of the guide rail plate (5) is positioned on the middle plate (52) and is matched with the vertical through hole of the rotating seat plate (4);
an upper limiting block (55) is arranged at the outer side end of the front section plate (51), a lower limiting block (56) is arranged at the outer side end of the rear section plate (53), and the upper limiting block (55) and the lower limiting block (56) are both positioned in the detection guide rail (50);
the detection channel (57) is respectively positioned on the front section plate (51) and the rear section plate (53), and the detection channel (57) is provided with a limit pressing bar (58) for limiting the top surface of the chip (9) in the detection guide rail (50).
10. The LQFP packaged chip multi-surface pin size semiautomatic detection tool according to claim 9, wherein the outer end portions of the front-stage plate (51) and the rear-stage plate (53) are provided with handles (54).
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| CN202311059600.0A CN116772679B (en) | 2023-08-22 | 2023-08-22 | Semi-automatic detection tool for multi-surface pin size of LQFP packaging chip |
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