A device for detecting line distribution density in an HDI board

Abstract

The application discloses a kind of detecting line distribution density device in HDI board, belong to HDI board processing field.It includes detection unit and auxiliary unit, the external driving motor of upper side stops movement, the pushing shell of upper side returns to accurate working condition, the pushing shell of driving lower side moves to one end at this time, repeat the above steps, and the intermittent rhythm of the side end surface of the trigger rod of two groups is adhered to the inner cavity wall of detection box, so that the intermittent current formed flows inward to the surface of matching bending cylinder, and the welding spot on the surface of HDI board is detected by intermittent current.If current passes through the surface of HDI board, the tiny crack and bridge connection that visual inspection cannot find can be detected, so it is intermittent current detection, and it will not cause component overheating failure due to detection conduction failure, and it will not cause component corrosion and metamorphic condition due to flux decomposition gas.

Description

TECHNICAL FIELD

[0001] The application relates to the field of HDI board processing, in particular to a device for detecting circuit distribution density in an HDI board. BACKGROUND

[0002] HDI is the abbreviation of High Density Interconnector, which is a kind of (technology) for producing printed circuit boards, and is a kind of circuit board with relatively high circuit distribution density using micro blind hole technology. HDI is a compact product designed for small capacity users.

[0003] Patent No. CN202122778885.6 discloses a kind of plating capacity detection device for HDI board, including detection table, the surface of the detection table is provided with detection groove, clamping assembly is arranged in the detection groove, the side of the detection groove is respectively provided with sliding detection mechanism, detection lamp stand and display screen, detection illumination lamp and display screen are arranged on the detection lamp stand, the both sides of the detection groove are symmetrically provided with slide rail, the sliding detection mechanism is slidably connected on the slide rail.

[0004] Patent No. CN202122625206.1 discloses a kind of detection tool for detecting the position accuracy between through holes on HDI board, including workbench, the bracket is fixed on the table top of the workbench, the power unit is arranged on the table top of the workbench, the output shaft of the power unit is arranged upwards, and the output shaft is provided with a turntable, a positioning groove matched with the HDI board is formed in the top surface of the turntable, the depth of the positioning groove is less than the thickness of the HDI board, the top beam of the bracket is fixed with a lifting cylinder, the acting end of the lifting cylinder piston rod penetrates through the beam and is arranged, and the extending end is fixed with a connecting plate, the bottom of the connecting plate is fixed with a lifting plate, a guide column is slidably installed on the lifting plate, the both ends of the guide column penetrate through the lifting plate and are arranged, the bottom of the guide column is fixed with a cylindrical head coaxially arranged, and the diameter of the cylindrical head is equal to the diameter of the through hole.

[0005] Patent No. CN202122778885.6 discloses a kind of plating capacity detection device for HDI board, which solves the problem that the current detection device has low detection accuracy and cannot detect the thickness of the plating layer of the whole board; Patent No. CN202122625206.1 discloses a kind of detection tool for detecting the position accuracy between through holes on HDI board, which solves the problem that manual measurement on the display still produces a large amount of measurement error, leading to the unqualified HDI board flowing into the subsequent production process, and the qualified HDI board being rejected; but there are still the following problems:

[0006] 1) When the staff detects the HDI board, the semi-cured sheet in the inner cavity is easily extruded and damaged;

[0007] 2) Using electrical detection is easy to cause component overheating failure due to detection of conduction failure, and may cause component corrosion and deterioration due to decomposition of flux gas;

[0008] 3) It is unable to detect whether it will cause the solder joint to fall off or the component to be offset in the state of jolt;

[0009] 4) It is unable to measure whether the line distribution density reaches the expectation. SUMMARY

[0010] Technical problems to be solved

[0011] The purpose of the present application is to provide a device for detecting line distribution density in HDI board to solve the problems raised in the background art.

[0012] Technical solution

[0013] A device for detecting line distribution density in HDI board, comprising a detection unit and an auxiliary unit, an auxiliary unit is installed between two groups of detection units, the detection unit comprises a containing disc and a detection mechanism arranged in the inner cavity of the containing disc, an installation stopper is laid on the upper end face of the detection mechanism, an insulation mechanism is installed on the upper end face of the installation stopper, a conductive sheet is clamped on the inner end face of the insulation mechanism, and a placing mechanism is clamped and installed between two groups of conductive sheets.

[0014] As a preferred scheme of the device for detecting line distribution density in HDI board, the detection mechanism comprises a detection box and a push shell arranged in the inner cavity of the detection box, a connecting rod is transversely connected to the side end face of the push shell, one end of the connecting rod is movably connected with a communication block through a movable block, the connecting rod and the communication block are movably connected through a conductive ring at the upper end face adjacent to the communication block, a trigger rod is vertically arranged on the side end face of the communication block, a fixed cross rod is installed between two groups of trigger rods, and the other end of the fixed cross rod is vertically connected to the edge of the inner cavity wall of the detection box.

[0015] Based on the above technical features: because the side end surface of the fixed cross bar is fixedly connected to the inner cavity wall of the detection box, the side end surface of the push shell is attached to the edge of the inner cavity wall of the detection box, the external motor drives the push shell to push the end of the connecting rod, and the connecting rod is pressed to the end of the movable block during the pushing process. During the pressing process, the movable block is bent in the direction of the protruding conductive ring belt. When the side end surface of the movable block is attached to the conductive ring belt, a closed circuit is formed, and when the upper push shell is pushed to one side, the external driving motor stops moving, and the upper push shell returns to the normal working state. At this time, the lower push shell is driven to move to one end, and the above steps are repeated, so that the side end surfaces of the upper and lower trigger rods are intermittently and rhythmically attached to the inner cavity wall of the detection box, so that the intermittent current flows inward to the surface of the matching bending cylinder, and the intermittent current detects the welding points on the surface of the HDI board. If the current passes through the surface of the HDI board, the micro cracks and bridge connections that cannot be found by visual inspection can be detected. At this time, it is intermittent current detection, which will not cause overheating failure of components due to poor detection conduction, and will not cause corrosion and metamorphism of components due to decomposition of flux gas.

[0016] As a preferred scheme of the device for detecting the line distribution density in the HDI board, the insulation mechanism comprises an insulation cover and an insulation ring surrounding the upper end surface edge of the insulation cover, and the outer end surface of the insulation ring is attached to the inner cavity wall of the containing disc.

[0017] Based on the above technical features: the inner end surface of the insulation cover is attached to the two ends of the conductive sheet, the lower end surface of the insulation cover is attached to the upper end surface of the placement plate, and the outer end surface of the insulation ring is attached to the inner cavity wall of the containing disc. The current is insulated, so that the current generated during detection does not contact the workers externally, avoiding electric shock.

[0018] Preferably, the detection unit further comprises a connecting plate, the side end surface of the placement mechanism is provided with the connecting plate, the inner cavity of the other group of containing discs is provided with a penetrating rod, the penetrating rod penetrates into the inner cavity of the matching mechanism, and the placement plate is installed at the interval between the two groups of detection mechanisms.

[0019] Preferably, the placement mechanism comprises a placement frame and a placement plate arranged in the inner cavity of the placement frame, and the side end surface of the placement plate is connected in series with the edge between the connecting plate.

[0020] Preferably, the matching mechanism comprises a mounting box and a matching bending cylinder arranged at the edge of the side end surface of the mounting box, the side end surface inner cavity of the matching bending cylinder is provided with a penetrating rod, so that the penetrating rod and the matching mechanism form a whole.

[0021] As a preferred scheme of the device for detecting the circuit distribution density in the HDI plate, the plate comprises a plate body and a hollow hole arranged in the middle of the plate body.

[0022] Based on the technical features, the edge of the plate body of the HDI plate is continuously knocked by the two groups of communication blocks at the upper and lower points of the detection box during the electrical detection of the components, so that the HDI plate simulates a continuously jolting state during the detection, and the HDI plate is detected in the jolting state to detect whether the soldering points fall off or the components are offset.

[0023] As a preferred scheme of the device for detecting the circuit distribution density in the HDI plate, the auxiliary unit comprises a bearing plate and a telescopic plate installed at both ends of the bearing plate, a connecting horizontal belt is installed above the telescopic plate, a vertical supporting rod is vertically arranged at the lower end surface of the connecting horizontal belt, a connecting rod is installed between the two groups of vertical supporting rods, the upper end surface of the connecting rod is attached to the lower surface of the bearing plate, and an auxiliary vertical cylinder is vertically arranged at the middle of the upper end surface of the bearing plate.

[0024] Based on the technical features, the overall device is supported by the connecting rod, and in the process of pushing the containing disc inward, the connecting horizontal belt is bent upward around the vertical supporting rod as the fulcrum under the extrusion and pushing of the two ends, the telescopic plate is contracted to the vertical supporting rod under the pressing of the connecting horizontal belt, and in the process of deformation of the overall auxiliary unit, the position of the detection unit relative to the initial state is lowered, the workers continuously press the two containing discs inward, the position of the detection unit and the auxiliary unit is changed, the workers take out the HDI plate to check whether the circuit on the surface of the HDI plate is offset, and if the circuit is offset, the HDI plate is placed into the device again for electrical detection, whether the components in the HDI plate can continue to operate after the offset is detected, and the functional diversity of the device is improved.

[0025] As a preferred scheme of the device for detecting the circuit distribution density in the HDI plate, the auxiliary vertical cylinder comprises a vertical cylinder body and a hollow cavity arranged in the inner cavity of the vertical cylinder body, the inner cavity of the vertical cylinder body is provided with an observation hole, and the workers pull out the two containing discs outward so that there is a gap between the two containing discs.

[0026] Based on the above technical features: The HDI board to be tested is placed on the upper surface of the board body, with one end of the HDI board aligned with the outer end face of the observation hole. The side end face of the HDI board abuts against one side of the placement frame, and the upper end face of the HDI board is attached to the bottom end face of the placement plate. At this time, the operator pushes the two sets of holding trays inward and inserts the insertion rod into the inner cavity of the matching curved cylinder, sliding it along the inner cavity until the placement frame contacts the connecting plate. At this time, the inner end faces of the arc-shaped rings of the placement frame and the connecting plate both contact the outer surface of the vertical cylinder body. The HDI board passes through the observation hole on one side and enters the inner cavity of the hollow cavity. The operator can view the HDI board from top to bottom through the top of the hollow cavity. During this process, the operator does not need to directly contact the HDI board to move it to the position to be tested, avoiding the situation where the operator's contact with the HDI board causes compression and damage to the semi-cured sheet in its inner cavity.

[0027] As a preferred embodiment of the device for detecting the line distribution density in an HDI board according to the present invention, the opening diameter of the vertical cylinder is consistent with the inner wall diameter of the hollow hole, and the outer surface of the vertical cylinder is clamped by the inner end face of the placement plate and the connecting plate.

[0028] Based on the aforementioned technical features: While inspecting the HDI board, the operator removes a rangefinder and inserts it from top to bottom through the hollow cavity to measure distances to components and circuits on the HDI board positioned within the observation holes. The multiple observation holes act like a ruler, ensuring the rangefinder's output measures distances at each hole. After measuring distances at each location, the data is recorded, and the density of the circuit distribution is observed, thus avoiding data inaccuracies caused by a single measurement. During the measurement process, the operator can observe the position of the HDI board and the rangefinder's output through the observation holes from the outside in, allowing for immediate detection of any shifts in the rangefinder's position and immediate adjustment of its height, thus improving the device's practicality.

[0029] Beneficial effects

[0030] Compared with the prior art, the advantages of this invention are:

[0031] 1. Staff can view the HDI board from top to bottom through the top of the hollow cavity. During this process, staff do not need to directly touch the HDI board to move it to the position to be tested, thus avoiding the situation where staff touch the HDI board and cause compression damage to the semi-cured sheet inside the cavity.

[0032] 2. The upper and lower sets of trigger rod side faces intermittently and rhythmically contact the inner wall of the detection box, thereby generating an intermittent current that flows inward to the surface of the mating bend. This intermittent current is used to detect the solder joints on the HDI board surface. If the current passes through the HDI board surface, it can detect minute cracks and bridging that are not visible to the naked eye. Because this is intermittent current detection, it will not cause component overheating failure due to poor conductivity, nor will it cause component corrosion or deterioration due to flux decomposition gases.

[0033] 3. While performing electrical tests on the components, the two sets of connecting blocks continuously tap the edge of the HDI board at the top and bottom of the test box, thus simulating a constantly bumping state for the HDI board during the test. The test is performed on the HDI board under this bumping state to check whether solder joints will fall off or components will shift.

[0034] 4. It can detect whether the components in the HDI board can continue to operate after being offset, thus improving the functionality of the device.

[0035] 5. The inner end face of the insulating cover is attached to both ends of the conductive sheet, the lower end face of the insulating cover is attached to the upper end face of the placement plate, and the outer end face of the insulating ring is attached to the inner wall of the holding tray to insulate the current, so that the current generated during the testing process will not come into contact with the staff and avoid electric shock.

[0036] 6. While inspecting the HDI board, the staff takes out the rangefinder and inserts it from top to bottom through the hollow cavity to measure the distance to the components and circuits on the HDI board located in the observation holes. The multiple sets of observation holes can be compared to a ruler, so that the output of the rangefinder can measure the distance at each observation hole. After completing the distance measurement at each position, the distance measurement data is recorded and read to check the distribution density of the circuits, thereby avoiding the occurrence of data deviation caused by a single distance measurement.

[0037] 7. During the distance measurement process, staff can observe the position of the HDI board and the output end of the distance measuring instrument from the outside to the inside through the observation hole. They can be aware of any shift in the position of the distance measuring instrument as soon as possible and adjust the height of the distance measuring instrument immediately, thus improving the practicality of the device. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of a device for detecting the line distribution density in an HDI board according to the present invention;

[0039] Figure 2 This is a schematic diagram of the detection unit structure of a device for detecting the line distribution density in an HDI board according to the present invention;

[0040] Figure 3 A detection mechanism structure diagram of the device for detecting the line distribution density in the HDI plate;

[0041] Figure 4 An insulation mechanism structure diagram of the device for detecting the line distribution density in the HDI plate;

[0042] Figure 5 A placing mechanism structure diagram of the device for detecting the line distribution density in the HDI plate;

[0043] Figure 6 A matching mechanism structure diagram of the device for detecting the line distribution density in the HDI plate;

[0044] Figure 7 A placing plate structure diagram of the device for detecting the line distribution density in the HDI plate;

[0045] Figure 8 An auxiliary unit structure diagram of the device for detecting the line distribution density in the HDI plate;

[0046] Figure 9 An auxiliary vertical cylinder structure diagram of the device for detecting the line distribution density in the HDI plate.

[0047] The figure mark: 1, detection unit; 11, holding disc; 12, detection mechanism; 121, detection box; 122, push shell; 123, connecting rod; 124, movable block; 125, conductive ring belt; 126, communication block; 127, trigger rod; 128, fixed crossbar; 13, installation stop block; 14, insulation mechanism; 141, insulation cover; 142, insulation ring; 15, placing mechanism; 151, placing frame; 152, placing plate; 16, conductive sheet; 17, connecting plate; 18, interpenetration rod; 19, matching mechanism; 191, installation box; 192, matching bending cylinder; 1A, placing plate; 1A1, plate body; 1A2, hollow hole; 2, auxiliary unit; 21, bearing plate; 22, telescopic plate; 23, connection crossband; 24, vertical support rod; 25, connection rod; 26, auxiliary vertical cylinder; 261, vertical cylinder cylinder; 262, hollow cavity; 263, observation hole. DETAILED DESCRIPTION

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0050] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] Please refer to Figures 1-9 The present application provides a technical solution:

[0052] Embodiment 1

[0053] A device for detecting the distribution density of lines in an HDI board, comprising a detection unit 1 and an auxiliary unit 2, the auxiliary unit 2 is installed between the two groups of detection units 1, the detection unit 1 comprises a containing disc 11 and a detection mechanism 12 arranged in the inner cavity of the containing disc 11, the upper end face of the detection mechanism 12 is paved with a mounting stopper 13, the upper end face of the mounting stopper 13 is installed with an insulation mechanism 14, the inner end face of the insulation mechanism 14 is clamped with a conductive sheet 16, and the two groups of conductive sheets 16 are clamped with a placing mechanism 15.

[0054] The detection mechanism 12 comprises a detection box 121 and a pushing shell 122 arranged in the inner cavity of the detection box 121. The lateral end surface of the pushing shell 122 is transversely connected with a connecting rod 123. One end of the connecting rod 123 is movably connected with a communicating block 126 through a movable block 124. The connecting rod 123 is movably connected with the upper end surface of the communicating block 126 through a conducting ring 125. The lateral end surface of the communicating block 126 is perpendicularly provided with a trigger rod 127. Two groups of trigger rods 127 are installed with a fixed horizontal rod 128. The other end of the fixed horizontal rod 128 is perpendicularly connected to the edge of the inner cavity wall of the detection box 121. The lateral end surface of the fixed horizontal rod 128 is fixedly connected to the inner cavity wall of the detection box 121. The lateral end surface of the pushing shell 122 is attached to the edge of the inner cavity wall of the detection box 121. The pushing shell 122 is driven by an external motor to push the connecting rod 123. During the pushing process, the connecting rod 123 presses the movable block 124 at one end. During the pressing process, the movable block 124 is bent in the direction of the protruding conducting ring 125. When the lateral end surface of the movable block 124 is attached to the conducting ring 125, a closed circuit is formed. When the upper pushing shell 122 is pushed to one side until the lateral end surface of the communicating block 126 is pushed to the inner cavity wall of the detection box 121, the upper external driving motor stops moving. The upper pushing shell 122 returns to the normal working state. At this time, the lower pushing shell 122 is driven to move to one end. The above steps are repeated to intermittently and rhythmically attach the lateral end surfaces of the upper and lower two groups of trigger rods 127 to the inner cavity wall of the detection box 121. Thus, the intermittent current formed is flowed inward to the surface of the cooperating bending cylinder 192 to detect the solder joints on the surface of the HDI board. If the current passes through the surface of the HDI board, the tiny cracks and bridges that cannot be found by visual inspection can be detected. At this time, it is intermittent current detection. It will not cause overheating failure of components due to detection conduction failure. It will not cause corrosion and metamorphic conditions of components due to decomposition of flux gas.

[0055] Example 2

[0056] The insulation mechanism 14 comprises an insulation cover 141 and an insulation ring 142 surrounding the upper end surface edge of the insulation cover 141. The outer end surface of the insulation ring 142 is attached to the inner cavity wall of the holding disc 11. The inner end surface of the insulation cover 141 is attached to the two ends of the conducting sheet 16. The lower end surface of the insulation cover 141 is attached to the upper end surface of the placement plate 152. The outer end surface of the insulation ring 142 is attached to the inner cavity wall of the holding disc 11. The current is insulated so that the current generated during the detection process will not contact the workers outside, avoiding the occurrence of electric shock.

[0057] Example 3

[0058] The detection unit 1 further comprises a connecting plate 17, the side end face of the placing mechanism 15 is provided with the connecting plate 17, the inner cavity of the other group of the placing disc 11 is provided with a penetrating rod 18, the penetrating rod 18 penetrates into the inner cavity of the cooperating mechanism 19, and the interval of the two groups of detection mechanisms 12 is provided with a placing plate 1A.

[0059] The placing mechanism 15 comprises a placing frame 151 and a placing plate 152 arranged in the inner cavity of the placing frame 151, and the side end face of the placing plate 152 is connected between the edges of the connecting plate 17.

[0060] The cooperating mechanism 19 comprises a mounting box 191 and a cooperating bending cylinder 192 arranged at the edge of the side end face of the mounting box 191, and the side end face inner cavity of the cooperating bending cylinder 192 is provided with the penetrating rod 18, so that the penetrating rod 18 and the cooperating mechanism 19 become an integral whole.

[0061] The placing plate 1A comprises a plate body 1A1 and a hollow hole 1A2 arranged in the middle of the plate body 1A1, and when the components are electrically detected, the edge of the plate body 1A1 of the HDI plate is continuously knocked by the two groups of communication blocks 126 at the upper and lower points of the detection box 121, so that the HDI plate simulates the state of continuous jolting in the detection process, and the HDI plate is detected in the jolting state to detect whether the soldering point falls off or the components deviate.

[0062] Embodiment 4

[0063] The auxiliary unit 2 comprises a bearing plate 21 and a telescopic plate 22 arranged at both ends of the bearing plate 21, a connecting horizontal belt 23 is arranged above the telescopic plate 22, a vertical supporting rod 24 is vertically arranged at the lower end face of the connecting horizontal belt 23, a connecting rod 25 is arranged between the two groups of vertical supporting rods 24, the upper end face of the connecting rod 25 is attached to the lower side of the bearing plate 21, a auxiliary vertical cylinder 26 is vertically arranged at the middle of the upper end face of the bearing plate 21, the overall device is supported by the connecting rod 25, in the process of pushing the placing disc 11 inward, the connecting horizontal belt 23 is bent upward around the vertical supporting rod 24 under the extrusion of the two ends, the telescopic plate 22 is contracted to the vertical supporting rod 24 under the pressing of the connecting horizontal belt 23, in the process of deformation of the auxiliary unit 2, the position of the detection unit 1 relative to the initial state is lowered, the staff continuously presses the two groups of placing discs 11 inward, the position of the detection unit 1 and the auxiliary unit 2 changes, simulates whether the prepreg, core plate and each layer of circuit of the plate body of the HDI plate can maintain the initial installation state under the condition of external extrusion, the staff takes down the HDI plate to check whether the circuit on the surface of the HDI plate deviates, if the deviation occurs, the HDI plate is placed into the device again for power-on detection, whether the components in the HDI plate can continue to operate after the deviation is detected, and the functional diversity of the device is improved.

[0064] Embodiment 5

[0065] The auxiliary vertical cylinder 26 comprises a vertical cylinder body 261 and a hollow cavity 262 arranged in the inner cavity of the vertical cylinder body 261. The inner cavity of the vertical cylinder body 261 is provided with an observation hole 263. The workers pull out the two groups of holding plates 11 outward, so that there is a gap between the two groups of holding plates 11. The HDI board to be detected is placed on the upper end face of the plate body 1A1. One end of the HDI board is aligned with the outer end face of the observation hole 263. The side end face of the HDI board abuts against one side of the placing frame 151. The upper end face of the HDI board is attached to the bottom end face of the placing plate 152. At this time, the workers push the two groups of holding plates 11 inward. The penetrating rod 18 is inserted into the inner cavity of the matching bent cylinder 192 and slides along the inner cavity as the path until the placing frame 151 contacts the connecting plate 17. At this time, the inner end faces of the arc-shaped loops of the placing frame 151 and the connecting plate 17 contact the outer surface of the vertical cylinder body 261. The HDI board passes through the observation hole 263 on one side and enters the inner cavity of the hollow cavity 262. The workers can view the HDI board from top to bottom through the top end of the hollow cavity 262. In this process, the workers do not need to directly contact the HDI board, but can move it to the position to be detected, avoiding the situation that the workers contact the HDI board and cause extrusion damage to the prepreg in the inner cavity of the HDI board.

[0066] Embodiment 6

[0067] The opening diameter of the vertical cylinder body 261 is consistent with the inner cavity wall diameter of the hollow hole 1A2. The outer surface of the vertical cylinder body 261 is clamped by the inner end faces of the placing plate 152 and the connecting plate 17. While detecting the HDI board, the workers take out the distance meter. The distance meter passes through the inner cavity of the hollow cavity 262 from top to bottom and measures the distance to the components and circuits on the HDI board positioned in the observation hole 263. The multiple groups of observation holes 263 can be compared to a scale. The output end of the distance meter measures the distance at each observation hole 263. After completing the distance measurement at each position, the distance measurement data is recorded. The distance measurement data at each position is read to check the circuit distribution density, thereby avoiding the situation that the single distance measurement causes the data to deviate. The workers can observe the position of the HDI board and the output end of the distance meter from the outside to the inside through the inner cavity of the observation hole 263 in the distance measurement process. The workers can know the first time when the position of the distance meter deviates and immediately adjust the height of the distance meter, thereby improving the practicability of the device.

[0068] The application discloses a kind of detection HDI board in line distribution density device, it is characterized in that, including detection unit 1 and auxiliary unit 2, two groups of detection unit 1 between installation auxiliary unit 2, detection unit 1 includes containing tray 11 and the detection mechanism 12 being arranged in the inner chamber of containing tray 11, the upper end face of detection mechanism 12 is paved with installation stopper 13, the upper end face of installation stopper 13 is installed with insulation mechanism 14, the inner end surface of insulation mechanism 14 is clamped with the conductive sheet 16, two groups of conductive sheet 16 between clamping installation are placed mechanism 15, staff pulls two groups of containing tray 11 outward, so that there is interval between two groups of containing tray 11, the HDI board needing to be detected is placed in the upper end surface of plate body 1A1, one end of HDI board is aligned with the outer end surface of observation hole 263, the side end surface of HDI board is pressed against one side of placing frame 151, the upper end surface of HDI board is attached to the bottom end surface of placing plate 152, at this time staff pushes two groups of containing tray 11 inward, and inserts into the inner chamber of cooperation bending cylinder 192 with its inner chamber as path to slide, until placing frame 151 and connecting plate 17 are contacted, at this time the arc-shaped ring inner end surface of placing frame 151 and connecting plate 17 are contacted to the outer surface of vertical cylinder barrel 261, HDI board is inserted into the inner chamber of hollow cavity 262 through one side observation hole 263, and staff can look down from top to bottom through the top of hollow cavity 262 and see HDI board, in the process, staff need not directly contact HDI board, can move it to the position to be detected, avoid the situation that staff contacts HDI board to cause extrusion damage to the inner chamber of semi-solid sheet of HDI board to occur;

[0069] The side end surface of the fixed cross bar 128 is fixedly connected to the inner cavity wall of the detection box 121, the side end surface of the pushing shell 122 is attached to the edge of the inner cavity wall of the detection box 121, the pushing shell 122 is pushed to one end of the connecting rod 123 by the external motor, the connecting rod 123 is pressed to the movable block 124 at one end during the pushing of the connecting rod 123, the movable block 124 is bent in the direction of the protruding conducting ring 125 during the pressing, the current circuit forms a closed circuit when the side end surface of the movable block 124 is attached to the conducting ring 125, the upper pushing shell 122 is pushed to one side, and the side end surface of the connecting block 126 is pushed to the inner cavity wall of the detection box 121, then the external driving motor stops moving, the upper pushing shell 122 returns to the normal working state, the lower pushing shell 122 is driven to move to one end, and the above steps are repeated, so that the side end surfaces of the two groups of trigger rods 127 are intermittently and rhythmically attached to the inner cavity wall of the detection box 121, thereby forming an intermittent current flowing inward to the surface of the matching bending cylinder 192, and the welding points on the surface of the HDI plate are detected by the intermittent current. If the current passes through the surface of the HDI plate, the tiny cracks and bridging that cannot be found by visual inspection can be detected, so this is an intermittent current detection, which will not cause the overheating failure of the components due to poor detection conduction, and will not cause the corrosion and metamorphosis of the components due to the decomposition of the flux gas;

[0070] At the same time of electrical detection of the components, the two groups of connecting blocks 126 continuously knock the edge of the plate body 1A1 of the HDI plate on the detection box 121, so that the HDI plate simulates a continuously jolting state during detection, and the HDI plate is detected in the jolting state to determine whether the welding points fall off or the components deviate;

[0071] The overall device is supported by the connecting rod 25, the connecting cross belt 23 is bent upward around the vertical support rod 24 as a fulcrum under the extrusion of the two ends during the inward pushing of the containing disc 11, the telescopic plate 22 is contracted to the vertical support rod 24 under the pressing of the connecting cross belt 23, the position of the detection unit 1 relative to the initial state is lowered during the deformation of the auxiliary unit 2, the workers continuously press the two groups of containing discs 11 inward, the attachment position of the detection unit 1 and the auxiliary unit 2 changes, and it is simulated whether the prepreg, core plate and each layer of circuit of the plate body of the HDI plate can maintain the initial installation state under the external extrusion, the workers take out the HDI plate to check whether the circuit on the surface of the HDI plate deviates, the HDI plate is placed into the device again for electrical detection if the deviation occurs, whether the components in the HDI plate can continue to operate after the deviation is detected, and the functional diversity of the device is improved;

[0072] The inner end surface of the insulation cover 141 is attached to the two ends of the conductive sheet 16, the lower end surface of the insulation cover 141 is attached to the upper end surface of the placement plate 152, and the outer end surface of the insulation ring 142 is attached to the inner cavity wall of the containing disc 11, so that the current is insulated, and the current generated during detection cannot contact the workers outside, so that the electric shock is avoided;

[0073] When the HDI board is detected, the worker takes out the distance meter, and the distance meter is vertically penetrated through the inner cavity of the hollow cavity 262, and the distance meter is positioned on the components and the circuit on the HDI board in the observation hole 263. A plurality of observation holes 263 are set to be similar to a scale, so that the output end of the distance meter is measured at each observation hole 263, and after the distance measurement of each position is completed, the distance measurement data is recorded, the distance measurement data of each position is read, and the circuit distribution density is checked, so that the deviation of the data caused by single distance measurement is avoided. The worker can observe the position of the HDI board and the output end of the distance meter from the outside to the inside through the inner cavity of the observation hole 263 during the distance measurement, and can know the first time when the position of the distance meter is deviated, and immediately adjust the height of the distance meter, thereby improving the practicability of the device.

[0074] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application, and are not used to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the line distribution density in an HDI board, characterized in that, The device includes a detection unit (1) and an auxiliary unit (2). An auxiliary unit (2) is installed between the two sets of detection units (1). The detection unit (1) includes a holding tray (11) and a detection mechanism (12) disposed in the cavity of the holding tray (11). An installation block (13) is laid on the upper end surface of the detection mechanism (12). An insulation mechanism (14) is installed on the upper end surface of the installation block (13). A conductive sheet (16) is clamped on the inner end surface of the insulation mechanism (14). A placement mechanism (15) is clamped between the two sets of conductive sheets (16). The detection mechanism (12) includes a detection box (121) and a push shell (122) disposed in the inner cavity of the detection box (121). A connecting rod (123) is laterally connected to the side end face of the push shell (122). One end of the connecting rod (123) is movably connected to the connecting block (126) through a movable block (124). The upper end face of the connecting rod (123) and the connecting block (126) are adjacent to each other through a conductive ring (125). A trigger rod (127) is vertically disposed on the side end face of the connecting block (126). A fixed crossbar (128) is installed between the two sets of trigger rods (127). The other end of the fixed crossbar (128) is vertically connected to the edge of the inner cavity wall of the detection box (121).

2. The device for detecting the line distribution density in an HDI board according to claim 1, characterized in that: The insulation mechanism (14) includes an insulation cover (141) and an insulation ring (142) surrounding the edge of the upper end face of the insulation cover (141), the outer end face of the insulation ring (142) being attached to the inner wall of the holding tray (11).

3. The device for detecting the line distribution density in an HDI board according to claim 1, characterized in that: The detection unit (1) also includes a connecting plate (17). The side end face of the placement mechanism (15) is equipped with the connecting plate (17). The inner cavity of the other set of holding trays (11) is equipped with an inserting rod (18). The inserting rod (18) is inserted into the inner cavity of the cooperating mechanism (19). The placement plate (1A) is installed at the interval between the two sets of detection mechanisms (12).

4. The device for detecting the line distribution density in an HDI board according to claim 1, characterized in that: The placement mechanism (15) includes a placement frame (151) and a placement plate (152) disposed in the inner cavity of the placement frame (151), wherein the side end face of the placement plate (152) is connected in series with the edge between the connecting plate (17).

5. The device for detecting the line distribution density in an HDI board according to claim 3, characterized in that: The mating mechanism (19) includes a mounting box (191) and mating bends (192) arranged on the edge of the side end face of the mounting box (191). An insert rod (18) is inserted into the inner cavity of the side end face of the mating bend (192), so that the insert rod (18) and the mating mechanism (19) become a whole.

6. The device for detecting the line distribution density in an HDI board according to claim 3, characterized in that: The placement plate (1A) includes a plate body (1A1) and a hollow hole (1A2) disposed in the middle of the plate body (1A1).

7. The device for detecting the line distribution density in an HDI board according to claim 1, characterized in that: The auxiliary unit (2) includes a support plate (21) and telescopic plates (22) installed at both ends of the support plate (21). A connecting crossband (23) is installed directly above the telescopic plate (22). A vertical support rod (24) is vertically arranged on the lower end face of the connecting crossband (23). A connecting rod (25) is installed between the two sets of vertical support rods (24). The upper end face of the connecting rod (25) is attached to the lower part of the support plate (21). An auxiliary vertical cylinder (26) is vertically arranged in the middle of the upper end face of the support plate (21).

8. The device for detecting the line distribution density in an HDI board according to claim 7, characterized in that: The auxiliary vertical tube (26) includes a vertical tube body (261) and a hollow cavity (262) disposed in the inner cavity of the vertical tube body (261). An observation hole (263) is provided through the inner cavity of the vertical tube body (261).

9. The device for detecting the line distribution density in an HDI board according to claim 8, characterized in that: The opening diameter of the vertical cylinder (261) is consistent with the inner wall diameter of the hollow hole (1A2), and the outer surface of the vertical cylinder (261) is clamped by the inner end face of the placement plate (152) and the connecting plate (17).

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