Dial mounting detection device, testing apparatus, and dial mounting detection method

Abstract

The present application belongs to the technical field of circuit board testing, and relates to a dial plate installation detection device, a testing equipment and a dial plate installation detection method. The dial plate installation detection device comprises a testing box and a mold, and the mold comprises a dial plate, a jig, a switching circuit board and a jig seat. The dial plate installation detection device can control the conduction and disconnection of two nodes through the on-off of the switches on the switch board, and then can apply voltage between two adjacent non-fixed test points (two dynamic test points) through the electrical contact points on the switching circuit board and the connecting needles on the dial plate to judge the conduction of the two dynamic test points. If the two dynamic test points are conductive, it indicates that the multiple groups of fixed test points are located at the correct position, and the dial plate is installed in place. If the two dynamic test points are not conductive, it indicates that the multiple groups of fixed test points are not located at the correct position, and the dial plate is not installed in place.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of circuit board testing, and particularly relates to a needle disc installation detection device, a testing equipment and a needle disc installation detection method. BACKGROUND

[0002] The circuit board testing equipment can be used for quality detection of the pads on the front and back surfaces of the to-be-tested circuit board. The circuit board testing equipment has upper and lower molds which are basically the same in structure. The mold usually comprises a jig, a jig seat and a needle disc, a plurality of connecting needles are inserted and installed on the needle disc, the jig is installed at the bottom of the jig seat, the jig and the jig seat have an insertion space therebetween, and the needle disc is inserted and connected in the insertion space.

[0003] In the prior art, when the needle disc is inserted into the insertion space, it cannot be known whether the needle disc has been installed in place. If the needle disc is not installed in place, the upper and lower molds may be damaged when they are pressed together for testing the to-be-tested circuit board. SUMMARY

[0004] The present application aims to solve the problem in the prior art that it cannot be known whether the needle disc has been installed in place when the needle disc is inserted into the insertion space, and provides a needle disc installation detection device, a testing equipment and a needle disc installation detection method.

[0005] To solve the above technical problems, on the one hand, the present application provides a needle disc installation detection device, which comprises a testing box and a mold, the mold comprises a needle disc, a jig, a conversion circuit board and a jig seat, the jig is connected at the bottom of the jig seat to form an insertion space therebetween, the needle disc is detachably inserted and installed in the insertion space, the conversion circuit board is arranged in the jig seat and located on the side of the needle disc away from the jig, the needle disc has a plurality of through holes penetrating through the needle disc along a first direction, one connecting needle is inserted in each through hole, both ends of the connecting needle protrude out of the through hole, the conversion circuit board is provided with a plurality of electrical contact points corresponding to the plurality of through holes, the testing box is provided with a switch board, the switch board is provided with a plurality of nodes corresponding to the plurality of electrical contact points, each electrical contact point is electrically connected to a node, and adjacent two nodes are connected through a switch.

[0006] The jig is provided with a plurality of test points corresponding to the plurality of through holes, the plurality of test points comprise a plurality of non-fixed test points and a plurality of groups of fixed test points, each group of fixed test points has two fixed test points which are conductive at the jig.

[0007] When the needle disc is inserted and installed in the insertion space, each connecting needle is located between the corresponding electrical contact point and the test point.

[0008] According to the needle disc installation detection device, the fixture has a plurality of test points corresponding to a plurality of through holes on the needle disc, the plurality of test points include a plurality of non-fixed test points and a plurality of groups of fixed test points, each group of fixed test points has two fixed test points that are in conduction at the fixture. In this way, each group of fixed test points is always in a conduction state, and when the needle disc is inserted into the insertion space, it cannot be directly judged whether each group of fixed test points is located at a correct position. However, by the on-off of the switch on the switch plate, the conduction and disconnection of the two nodes can be controlled, and then the electrical contact points on the adapter circuit board and the connecting needles on the needle disc can be used to apply a voltage between two adjacent non-fixed test points (two dynamic test points) to judge the conduction of the two dynamic test points. If the two dynamic test points are in conduction, it indicates that the plurality of groups of fixed test points are located at the correct position, and the needle disc is installed in place. If the two dynamic test points are not in conduction, it indicates that the plurality of groups of fixed test points are not located at the correct position, and the needle disc is not installed in place. When the needle disc is not installed in place, a prompt is given, and the operator will not start the machine, thereby avoiding damage to the mold, reducing the test cost, and improving the test efficiency.

[0009] Optionally, the plurality of non-fixed test points are arranged in a rectangular region, and each corner of the rectangular region is provided with a group of fixed test points.

[0010] The two adjacent fixed test points are in conduction.

[0011] Optionally, the plurality of non-fixed test points are divided into a plurality of test regions, and each test region has a same number of test points.

[0012] Optionally, part of the test points are set as conductive holes, and the rest of the test points are set as non-conductive holes, and all the test points of at least one test region are conductive holes.

[0013] The fixture is provided with a plurality of test probes, and the plurality of conductive holes are electrically connected to the plurality of test probes one by one through wires, and the test regions occupied by all the conductive holes form a detection region.

[0014] The test probe is used to contact a pad on a circuit board to be tested to detect the welding quality of the pad.

[0015] Optionally, the plurality of test regions are sequentially numbered, and all the test points in each test region are sequentially numbered. If the number of non-conductive holes in the last test region of the detection region is less than or equal to 1, the two test points at the front end of the next test region of the last test region of the detection region are determined as dynamic test points.

[0016] If the number of the non-conductive holes of the last test region of the detection region is greater than or equal to 2, the two test points at the end of the last test region are determined as dynamic test points;

[0017] According to the arrangement of all test points of the jig, the test region where the two dynamic test points are located and the corresponding number are determined, and the switch between the two nodes corresponding to the two dynamic test points is closed, so that the two dynamic test points are connected to the test circuit where the switch is located.

[0018] A voltage is applied to the test circuit, and it is detected whether the test circuit forms a loop; if yes, it indicates that the two dynamic test points are conductive, the multiple groups of fixed test points are located at the correct positions, and the needle disc is installed in place; if no, it indicates that the two dynamic test points are not conductive, the multiple groups of fixed test points are not located at the correct positions, and the needle disc is not installed in place.

[0019] Optionally, the total number of test points in each test region is N, and the test points are sequentially numbered as 1, 2, …, N.

[0020] The total number of conductive holes on the jig is M.

[0021] The number of test regions of the detection region is A.

[0022] If M / N is an integer, A=M / N; if M / N is not an integer, A is equal to the integer before the decimal point in the value of (M / N+1).

[0023] Optionally, the switch is a triode, the emitter of the triode is connected to one of the two adjacent switches, the collector of the triode is connected to the other of the two adjacent switches, the base of the triode is connected to an input voltage, and the conduction and disconnection of the collector and the emitter are controlled by the input voltage to realize the conduction and disconnection of the switch.

[0024] Optionally, one end of the connecting needle is provided with a first spring pin, and the other end of the connecting needle is provided with a second spring pin, the first spring pin is in elastic contact with the adapter circuit board, and the second spring pin is in elastic contact with the jig.

[0025] Optionally, a plurality of first sockets are provided on the adapter circuit board, each first socket is electrically connected to a row of electric contact points; a plurality of second sockets are provided on the switch board, each second socket is electrically connected to a row of nodes.

[0026] The needle disc mounting detection device further comprises a connecting flexible flat cable, two ends of the connecting flexible flat cable are respectively provided with a first plug and a second plug, the first plug is plugged into the first socket, and the second plug is plugged into the second socket.

[0027] Optionally, the jig seat comprises, in sequence along the first direction, a connecting plate, a pressure sensor, a circuit board mounting plate, and a needle disc mounting plate, the needle disc mounting plate and the jig form the mounting space, the circuit board mounting plate is hollow inside, and the adapter circuit board is mounted in the circuit board mounting plate.

[0028] Optionally, the jig seat is provided with a sensing piece, the sensing piece is located on one side of the mounting space, the needle disc is inserted from the side of the mounting space opposite to the sensing piece, and the sensing piece is used for preventing over-insertion of the needle disc.

[0029] Optionally, the jig comprises a jig disc, a jig base, and a probe seat, a plurality of test points are arranged on the jig disc, the jig disc is mounted on one side of the jig base close to the jig seat, the probe seat is mounted on one side of the jig base away from the jig seat, and a plurality of test probes are arranged on the side of the probe seat away from the jig base.

[0030] Optionally, the needle disc mounting detection device further comprises an installation-to-position prompting mechanism, the installation-to-position prompting mechanism is electrically connected with the switch plate, and is used for prompting whether the needle disc is installed to position.

[0031] The installation-to-position prompting mechanism is mounted on the test box.

[0032] In another aspect, the embodiment of the present application further provides a test device comprising the above needle disc mounting detection device.

[0033] The test device further comprises a mounting frame, and the mold is mounted on the mounting frame.

[0034] The test device further comprises a base, and the mounting frame is slidably connected to the base along the first direction.

[0035] The test device further comprises a mold translation mechanism, the mold translation mechanism is mounted on the base, and the mold translation mechanism is used for driving the mounting frame to move back and forth along the first direction, so that the mold can move back and forth along the first direction.

[0036] The test device of the embodiment of the present application can detect whether the needle disc is installed to position. When the needle disc is not installed to position, a prompt is given, and the operator will not start the machine, so that the mold is prevented from being damaged, the test cost is reduced, and the test efficiency is improved.

[0037] Optionally, the testing device further comprises a mold rotating mechanism, which is mounted on the mounting frame.

[0038] The mold rotating mechanism is configured to drive the mold to rotate around a preset axis, wherein the preset axis extends along the first direction.

[0039] In another aspect, the embodiment of the present application further provides a needle disc installation detection method based on the needle disc installation detection device, which comprises the following steps:

[0040] Inserting the needle disc into the insertion space;

[0041] Dividing the plurality of non-fixed test points into a plurality of test regions, wherein each test region has the same number of test points;

[0042] Setting part of the test points as conductive holes and the rest of the test points as non-conductive holes; and setting the test region occupied by all the conductive holes as a detection region;

[0043] Sequentially numbering the plurality of test regions and sequentially numbering all the test points in each test region;

[0044] Determining the number of non-conductive holes in the last test region of the detection region to determine two dynamic test points;

[0045] According to the arrangement of all the test points of the jig, determining the test region and the corresponding number of the two dynamic test points, and closing the switch between the two nodes corresponding to the two dynamic test points on the switch board, so that the two dynamic test points are connected to the test circuit where the switch is located;

[0046] Applying a voltage to the test circuit and detecting whether the test circuit forms a loop; if yes, it indicates that the two dynamic test points are conductive, the plurality of fixed test points are located at the correct positions, and the needle disc is installed in place; if not, it indicates that the two dynamic test points are not conductive, the plurality of fixed test points are not located at the correct positions, and the needle disc is not installed in place.

[0047] Optionally, the step of determining the number of non-conductive holes in the last test region of the detection region to determine two dynamic test points comprises:

[0048] If the number of non-conductive holes in the last test region of the detection region is less than or equal to 1, determining the two test points at the front end of the next test region of the last test region of the detection region as the dynamic test points;

[0049] If the number of the non-conductive holes of the last test area of the detection area is greater than or equal to 2, two test points at the last end of the last test area of the detection area are determined as the dynamic test points.

[0050] The needle disc installation detection method provided by the embodiment of the present application can detect whether the needle disc is installed in place. When the needle disc is not installed in place, a prompt is sent, and the operator will not start the machine, so that the mold is prevented from being damaged, the test cost is reduced, and the test efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 is a schematic diagram of a needle disc installation detection device provided by an embodiment of the present application;

[0052] Figure 2 is another view of Figure 1 ;

[0053] Figure 3 is a schematic diagram of a needle disc of a needle disc installation detection device provided by an embodiment of the present application;

[0054] Figure 4 is another view of Figure 3 ;

[0055] Figure 5 is another view of Figure 3 ;

[0056] Figure 6 is an enlarged view of b in Figure 5 ;

[0057] Figure 7 is a schematic diagram of a jig of a needle disc installation detection device provided by an embodiment of the present application;

[0058] Figure 8 is a test point distribution schematic diagram of a jig of a needle disc installation detection device provided by an embodiment of the present application;

[0059] Figure 9 is a flowchart of a needle disc installation detection method provided by an embodiment of the present application.

[0060] The reference signs in the specification are as follows:

[0061] 10, needle disc installation detection device;

[0062] 1, test box;

[0063] 2. Mold; 21. Needle plate; 211. Through hole; 212. Connecting pin; 2121. First spring pin; 2122. Second spring pin; 22. Fixture; 221. Fixture plate; 222. Fixture base; 223. Probe holder; 23. Fixture base; 231. Connecting plate; 232. Pressure sensor; 233. Circuit board mounting plate; 234. Needle plate mounting plate; 24. Sensing element;

[0064] 3. Mounting bracket;

[0065] 4. Base;

[0066] 5. Mold translation mechanism; 51. First motor;

[0067] 6. Mold rotation mechanism; 61. Second motor; 62. Reducer;

[0068] 7. Camera assembly; 71. Camera; 72. Camera bracket; 72.1. Elongated hole; 73. Adjusting bolt;

[0069] z, First direction; P, Test point; P1, Non-fixed test point; P2, Fixed test point; Pd, Dynamic test point; S, Test area; J, Detection area. Detailed Implementation

[0070] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0071] The first direction in this article refers to... Figure 1 As shown by the z-arrow.

[0072] like Figures 1 to 8As shown, the needle disc installation detection device 10 provided by an embodiment of the present application comprises a test box 1 and a mold 2, the mold 2 comprises a needle disc 21, a jig 22, a conversion circuit board and a jig seat 23; the jig 22 is connected to the bottom of the jig seat 23 to form a plug-in space between the two, the needle disc 21 is detachably plugged into the plug-in space, and the conversion circuit board is arranged in the jig seat 23 and located on the side of the needle disc 21 away from the jig 22; the needle disc 21 has a plurality of through holes 211 penetrating through the needle disc 21 along a first direction z, a connecting needle 212 is plugged into each through hole 211, and both ends of the connecting needle 212 protrude out of the through hole 211; the conversion circuit board is provided with a plurality of electrical contact points corresponding to the plurality of through holes 211, the test box 1 is provided with a switch board, the switch board is provided with a plurality of nodes corresponding to the plurality of electrical contact points, each electrical contact point is electrically connected to a node, and adjacent two nodes are connected through a switch; the jig 22 is provided with a plurality of test points P corresponding to the plurality of through holes, the plurality of test points P comprises a plurality of non-fixed test points P1 and a plurality of groups of fixed test points P2, each group of fixed test points P2 has two fixed test points P2 conducting at the jig 22; when the needle disc 21 is plugged into the plug-in space, each connecting needle 212 is located between the corresponding electrical contact point and the test point P.

[0073] The arrangement of the plurality of through holes 211 of the needle disc 21 is consistent with the arrangement of the plurality of test points P of the jig 22.

[0074] Figure 3 and Figure 5 In the figure, only three connecting needles 212 are shown, and in fact, a connecting needle 212 is arranged in each through hole 211.

[0075] According to the needle disc installation detection device 10 of the embodiment of the present application, each group of fixed test points P2 is always in a conducting state, when the needle disc 21 is plugged into the plug-in space, it cannot be directly judged whether each group of fixed test points P2 is located at a correct position. However, by the on-off of the switch on the switch board, the conduction and disconnection of the two nodes can be controlled, and then the electrical contact point on the conversion circuit board and the connecting needle 212 on the needle disc 21 can be used to apply a voltage between adjacent two non-fixed test points P1 (two dynamic test points) to judge the conduction of the two dynamic test points. If the two dynamic test points are in conduction, it indicates that the plurality of groups of fixed test points P2 are located at the correct positions, and the needle disc 21 is installed in place, if the two dynamic test points are not in conduction, it indicates that the plurality of groups of fixed test points P2 are not located at the correct positions, and the needle disc 21 is not installed in place. When the needle disc 21 is not installed in place, a prompt is given, and the operator will not start the machine, thereby avoiding damage to the mold, reducing the test cost, and improving the test efficiency.

[0076] The first direction z may be, for example, a vertical direction.

[0077] In an embodiment, the dial mounting detection device 10 further comprises a mounting-to-position prompting mechanism electrically connected with the switch board, for prompting whether the dial 21 is mounted to position, the mounting-to-position prompting mechanism being mounted on the test box 1. For example, the mounting-to-position prompting mechanism can be a sound alarm, which alarms when the dial 21 is not mounted to position. For another example, the mounting-to-position prompting mechanism can be a display, which displays words or graphics on the display when the dial 21 is not mounted to position, for prompting whether the dial 21 is mounted to position.

[0078] In an embodiment, referring to Figure 8 , the plurality of non-fixed test points P1 are arranged in a rectangular region, and a group of fixed test points P2 are arranged at each corner of the rectangular region; two adjacent fixed test points P2 are connected. Figure 2 For example, in , four groups of fixed test points P2 are arranged, i.e. eight fixed test points P2, which are represented by P21, P22, …, P28 in sequence. Among them, P21 and P22 are connected, P23 and P24 are connected, P25 and P26 are connected, and P27 and P28 are connected.

[0079] However, the fixed test points P2 can also be two or three groups.

[0080] In an embodiment, referring to Figure 8 , the plurality of non-fixed test points P1 are divided into a plurality of test regions S, and each test region S has the same number of test points P.

[0081] In an embodiment, referring to Figure 8 , some test points P are arranged as conductive holes, and the rest of the test points P are arranged as non-conductive holes, and all the test points P of at least one test region S are conductive holes; a plurality of test probes are arranged on the jig 22, and the plurality of conductive holes are electrically connected with the plurality of test probes one by one through wires, and the test region S occupied by all the conductive holes constitutes a detection region J. The test probes are used to contact the pads on the circuit board to be tested to detect the welding quality of the pads.

[0082] In an embodiment, the plurality of test regions S are sequentially numbered, and all the test points P of each test region S are sequentially numbered; if the number of non-conductive holes of the last test region S of the detection region J is less than or equal to 1, the two test points P at the front end of the next test region S of the last test region S of the detection region J are determined as dynamic test points Pd; if the number of non-conductive holes of the last test region S of the detection region J is greater than or equal to 2, the two test points P at the rear end of the last test region S of the detection region J are determined as dynamic test points Pd.

[0083] According to the arrangement of all test points P of the known fixture 22, the test area S where the two dynamic test points Pd are located and the corresponding number are determined, the switch between the two nodes corresponding to the two dynamic test points Pd is turned on, so that the two dynamic test points Pd are connected to the test circuit where the switch is located.

[0084] A voltage is applied to the test circuit, and it is detected whether the test circuit forms a loop; if yes, it indicates that the two dynamic test points Pd are turned on, the multiple groups of fixed test points P2 are located at the correct positions, and the dial 21 is installed in place; if no, it indicates that the two dynamic test points Pd are not turned on, the multiple groups of fixed test points P2 are not located at the correct positions, and the dial 21 is not installed in place.

[0085] Suppose the total number of test points P of each test area S is N, and the test points P are numbered in sequence as 1, 2, …, N; suppose the total number of conductive holes on the fixture 22 is M; then the number of test areas S of the detection area J is A; if M / N is an integer, then A = M / N; if M / N is not an integer, then A is equal to the integer before the decimal point in the value of (M / N+1). For example, when the total number of test points P of the test area S is 64, and the total number of conductive holes on the fixture 22 is 300, then N / M = 4.6875, and the number of test areas S of the detection area J A is 5. The two dynamic test points Pd are the last two test points P of the fifth test area S.

[0086] In an embodiment, the switch is a triode, the emitter of the triode is connected to one of the two adjacent switches, the collector of the triode is connected to the other of the two adjacent switches, and the base of the triode is connected to the input voltage. The conduction and disconnection of the collector and the emitter are controlled by the input voltage, so as to realize the conduction and disconnection of the switch.

[0087] In an embodiment, referring to Figure 4 and Figure 6 , one end of the connecting needle 212 is provided with a first spring pin 2121, and the other end of the connecting needle 212 is provided with a second spring pin 2122. The first spring pin 2121 is in elastic contact with the adapter circuit board, so as to realize good conductive contact between the connecting needle 212 and the electrical contact point of the adapter circuit board. The second spring pin 2122 is in elastic contact with the fixture 22, so as to realize good conductive contact between the connecting needle 212 and the test point P of the fixture 22.

[0088] In an embodiment, a plurality of first sockets are provided on the adapter circuit board, and each first socket is electrically connected to a row of electrical contact points. A plurality of second sockets are provided on the switch board, and each second socket is electrically connected to a row of nodes. The dial installation detection device further comprises a connecting flexible flat cable, and the two ends of the connecting flexible flat cable are respectively provided with a first plug and a second plug. The first plug is plugged into the first socket, and the second plug is plugged into the second socket.

[0089] In an embodiment, referring to Figure 1 and Figure 2 , the jig seat 23 comprises a connecting plate 231, a pressure sensor 232, a circuit board mounting plate 233 and a needle disc mounting plate 234 connected in sequence along the first direction z, the needle disc mounting plate 234 forms a plug-in space with the jig 22, the circuit board mounting plate 233 is hollow inside, and a relay circuit board is mounted in the circuit board mounting plate 233. The pressure sensor 232 is used to detect the pressure borne by the jig 22.

[0090] In an embodiment, referring to Figure 1 and Figure 2 , the jig seat 23 is provided with a sensing piece 24, the sensing piece 24 is located on one side of the plug-in space, the needle disc 21 is inserted from the side of the plug-in space opposite to the sensing piece 24, and the sensing piece 24 is used to prevent the needle disc 21 from being inserted too far. The sensing piece 24 can be an infrared sensor, a proximity sensor, etc.

[0091] In an embodiment, referring to Figure 7 , the jig 22 comprises a jig disc 221, a jig base 222 and a probe seat 223, a plurality of test points P are arranged on the jig disc 221, the jig disc 221 is mounted on one side of the jig base 222 close to the jig seat 23, and the probe seat 223 is mounted on one side of the jig base 222 away from the jig seat 23, and a plurality of test probes are arranged on the side of the probe seat 223 away from the jig base 222.

[0092] Referring to Figure 1 , an embodiment of the present application provides a test device comprising the needle disc mounting detection device 10 of the above embodiment.

[0093] The test device of the embodiment of the present application can detect whether the needle disc 21 is installed in place. When the needle disc 21 is not installed in place, a prompt is given, and the operator will not start the machine, thereby avoiding damage to the mold and reducing the test cost and improving the test efficiency.

[0094] In an embodiment, referring to Figure 1 , the test device further comprises a mounting frame 3, and the mold 2 is mounted on the mounting frame 3. In an embodiment, referring to Figure 1 , the test device further comprises a base 4, and the mounting frame 3 is slidingly connected to the base 4 along the first direction z.

[0095] In an embodiment, referring to Figure 1 , the test device further comprises a mold translation mechanism 5, and the mold translation mechanism 5 is mounted on the base 4. The mold translation mechanism 5 is used to drive the mounting frame 3 to move back and forth along the first direction z, so that the mold 2 can move back and forth along the first direction z.

[0096] In an embodiment, referring to Figure 1 and Figure 2The mold translation mechanism 5 comprises a first motor 51, a first screw rod and a first screw rod nut. The first motor 51 is mounted on the base 4. The first screw rod is coaxially connected to the output shaft of the first motor 51. The first screw rod nut is threadedly connected to the first screw rod. The first screw rod extends along the first direction z. The first screw rod nut is fixed to the mounting frame 3. The first motor 51 is configured to drive the first screw rod to rotate, thereby driving the first screw rod nut and the mounting frame 3 to reciprocate along the first direction z. In this way, the reciprocating movement of the mold 2 along the first direction z can be achieved.

[0097] In an embodiment, the mold translation mechanism 5 further comprises a screw rod seat having an inner hole in which a bearing is press-fitted. The first screw rod has a light axis segment which is press-fitted into the inner ring of the bearing to achieve the rotary support of the first screw rod. The base 4 has a cavity in which the first screw rod, the first screw rod nut and the screw rod seat are arranged. A connecting plate connecting the opposite side walls of the cavity is arranged in the cavity. The screw rod seat is fixed to the connecting plate. The first screw rod, the first screw rod nut and the screw rod seat are located inside the base 4, which is not shown in the figure.

[0098] In other embodiments, the mold translation mechanism 5 can also be a hydraulic cylinder, an air cylinder and a linear motor, etc.

[0099] In an embodiment, referring to Figure 1 The test device further comprises a mold rotation mechanism 6 mounted on the mounting frame 3. The mold rotation mechanism 6 is configured to drive the mold 2 to rotate around a preset axis. The preset axis extends along the first direction z.

[0100] In an embodiment, referring to Figure 1 The mold rotation mechanism 6 comprises a second motor 61 and a reducer 62. The second motor 61 is mounted on the mounting frame 3. The input end of the reducer 62 is connected to the output shaft of the second motor 61. The output end of the reducer 62 is connected to the mold 2. The reducer 62 is preferably a harmonic reducer, which has the advantage of small size. The reducer 62 is mounted on the connecting plate 231.

[0101] In an embodiment, referring to Figure 1 The test device further comprises a camera assembly 7 mounted on the mounting frame 3. The camera assembly 7 comprises a camera 71.

[0102] In an embodiment, referring to Figure 1 The camera assembly 7 further comprises a camera support 72. The camera 71 is mounted on the camera support 72. The camera support 72 is mounted on the mounting frame 3.

[0103] In an embodiment, the mounting position of the camera support 72 in the first direction z is adjustable. In this way, the mounting height of the camera 71 can be adjusted.

[0104] In an embodiment, referring to Figure 1The camera support 72 is provided with two long holes 721 extending along the first direction z, and the mounting frame 3 is provided with threaded holes corresponding to the positions of the long holes 721; the testing device further comprises at least one adjusting bolt 73, which is inserted into the long hole 721 and can be screwed into the threaded hole to temporarily fix the camera support 72 to the mounting frame 3; the adjusting bolt 73 is loosened, and the position of the camera support 72 in the first direction z can be adjusted.

[0105] In addition, the testing device further comprises a box, and the dial mounting detection device 10 is located in the box. The testing box 1 can be mounted on the box.

[0106] The testing device further comprises a controller, which is electrically connected with the switch plate in the testing box 1 to control the on-off of each switch on the switch plate.

[0107] In addition, referring to Figure 9 The embodiment of the present application further provides a dial mounting detection method based on the dial mounting detection device 10, which comprises the following steps:

[0108] The dial 21 is inserted into the insertion space.

[0109] The plurality of non-fixed test points P1 are divided into a plurality of test regions S; wherein each test region S has the same number of test points P.

[0110] Part of the test points are set as conductive holes, and the rest of the test points are set as non-conductive holes; the test region S occupied by all the conductive holes is set as a detection region J.

[0111] The plurality of test regions S are sequentially numbered, and all the test points P in each test region S are sequentially numbered.

[0112] The number of non-conductive holes in the last test region S of the detection region J is determined to determine two dynamic test points Pd.

[0113] According to the arrangement of all the test points P of the jig 22, the test region S where the two dynamic test points Pd are located and the corresponding number are determined, the switch between the two nodes corresponding to the two dynamic test points Pd on the switch plate is closed, so that the two dynamic test points Pd are connected to the test circuit where the switch is located.

[0114] A voltage is applied to the test circuit, and it is detected whether the test circuit forms a loop; if yes, it indicates that the two dynamic test points Pd are conductive, and the plurality of fixed test points P2 are located at the correct positions, and the dial 21 is installed in place; if not, it indicates that the two dynamic test points Pd are not conductive, and the plurality of fixed test points P2 are not located at the correct positions, and the dial 21 is not installed in place.

[0115] The needle disc installation detection method provided by the embodiment of the present application can detect whether the needle disc 21 is installed in place. When the needle disc 21 is not installed in place, a prompt is given, and the operator will not start the machine, thereby avoiding damage to the mold, reducing test cost, and improving test efficiency.

[0116] In an embodiment, the number of non-conductive holes of the last test area S of the detection area J is determined to determine that the two dynamic test points Pd include:

[0117] If the number of non-conductive holes of the last test area S of the detection area J is less than or equal to 1, the two test points P at the front end of the next test area S of the last test area S of the detection area J are determined as the dynamic test points Pd.

[0118] If the number of non-conductive holes of the last test area S of the detection area J is greater than or equal to 2, the two test points P at the rear end of the last test area S of the detection area J are determined as the dynamic test points Pd.

[0119] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A needle plate mounting detection device, characterized in that, The test chamber includes a test box and a mold. The mold includes a needle plate, a fixture, an adapter circuit board, and a fixture base. The fixture is connected to the bottom of the fixture base to form an insertion space between them. The needle plate is detachably inserted into the insertion space. The adapter circuit board is disposed in the fixture base and located on the side of the needle plate away from the fixture. The needle plate has multiple through holes penetrating the needle plate along a first direction. A connecting pin is inserted into each through hole, and both ends of the connecting pin protrude from the through hole. The adapter circuit board is provided with multiple electrical contact points corresponding to the multiple through holes. The test box is provided with a switch board, and the switch board is provided with multiple nodes corresponding to the multiple electrical contact points. Each electrical contact point is electrically connected to one of the nodes, and adjacent nodes are connected by a switch. The fixture has multiple test points that correspond one-to-one with the multiple through holes. The multiple test points include multiple non-fixed test points and multiple sets of fixed test points. Each set of fixed test points has two fixed test points that are connected at the fixture. When the needle plate is inserted into the insertion space, each of the connecting pins is located between the corresponding electrical contact point and the test point.

2. The needle plate mounting detection device according to claim 1, characterized in that, Multiple non-fixed test points are arranged in a rectangular area, and a set of fixed test points are set at each corner of the rectangular area. The two adjacent fixed test points are connected.

3. The needle plate mounting detection device according to claim 1, characterized in that, The multiple non-fixed test points are divided into multiple test areas, and each test area has the same number of test points.

4. The needle plate mounting detection device according to claim 3, characterized in that, Some of the test points are set as conductive holes, and the rest of the test points are set as non-conductive holes, and all the test points in at least one test area are conductive holes; The fixture is provided with a plurality of test probes, and the plurality of conductive holes are electrically connected to the plurality of test probes one by one through wires. The test area occupied by all the conductive holes constitutes the detection area. The test probe is used to contact the pads on the circuit board under test to detect the soldering quality of the pads.

5. The needle plate mounting detection device according to claim 4, characterized in that, Multiple test areas are numbered sequentially, and all test points in each test area are numbered sequentially; if the number of non-conductive holes in the last test area of ​​the detection area is less than or equal to 1, then the two frontmost test points of the next test area after the last test area of ​​the detection area are determined as dynamic test points. If the number of non-conductive holes in the last test area of ​​the detection area is greater than or equal to 2, then the two test points at the last end of the last test area of ​​the detection area are determined to be dynamic test points. Based on the known arrangement of all test points of the fixture, determine the test area and corresponding number of the two dynamic test points, and close the switch between the two nodes corresponding to the two dynamic test points so that the two dynamic test points are connected to the test circuit where the switch is located. A voltage is applied to the test circuit, and it is detected whether the test circuit forms a loop; if yes, it indicates that the two dynamic test points are conducting, the multiple sets of fixed test points are in the correct position, and the needle plate is installed in place; if no, it indicates that the two dynamic test points are not conducting, the multiple sets of fixed test points are not in the correct position, and the needle plate is not installed in place.

6. The needle plate mounting detection device according to claim 5, characterized in that, Let N be the sum of the test points in each test region, and let them be numbered sequentially as 1, 2...N; Let M be the total number of conductive holes on the fixture; Therefore, the number of test areas in the detection area is A; If M / N is an integer, then A = M / N; if M / N is not an integer, then A equals the integer part of (M / N+1) before the decimal point.

7. The needle plate mounting detection device according to claim 1, characterized in that, The switch is a transistor. The emitter of the transistor is connected to one of the two adjacent switches, and the collector of the transistor is connected to the other of the two adjacent switches. The base of the transistor is connected to the input voltage. The input voltage controls the conduction and disconnection of the collector and the emitter to realize the conduction and disconnection of the switch.

8. The needle plate mounting detection device according to claim 1, characterized in that, One end of the connecting pin is provided with a first spring pin, and the other end of the connecting pin is provided with a second spring pin. The first spring pin is in elastic contact with the adapter circuit board, and the second spring pin is in elastic contact with the fixture.

9. The needle plate mounting detection device according to claim 1, characterized in that, The adapter circuit board is provided with a plurality of first sockets, each of which is electrically connected to a row of electrical contact points; the switch board is provided with a plurality of second sockets, each of which is electrically connected to a row of nodes; The needle plate installation detection device also includes a connecting flexible cable, with a first plug and a second plug respectively provided at both ends of the connecting flexible cable. The first plug is plugged into the first socket, and the second plug is plugged into the second socket.

10. The needle plate mounting detection device according to claim 1, characterized in that, The fixture includes a connecting plate, a pressure sensor, a circuit board mounting plate, and a needle plate mounting plate connected sequentially along the first direction. The needle plate mounting plate and the fixture form the insertion space. The circuit board mounting plate is hollow inside, and the adapter circuit board is installed inside the circuit board mounting plate.

11. The needle plate mounting detection device according to claim 10, characterized in that, The fixture base is provided with a sensor, which is located on one side of the insertion space. The needle plate is inserted from the side of the insertion space opposite to the sensor, and the sensor is used to prevent the needle plate from being over-inserted.

12. The needle plate mounting detection device according to claim 1, characterized in that, The fixture includes a fixture disk, a fixture base, and a probe holder. Multiple test points are arranged on the fixture disk. The fixture disk is installed on one side of the fixture base near the fixture base. The probe holder is installed on one side of the fixture base away from the fixture base. Multiple test probes are arranged on the side of the probe holder away from the fixture base.

13. The needle plate mounting detection device according to claim 1, characterized in that, The needle plate installation detection device also includes an installation in place reminder mechanism, which is electrically connected to the switch board and is used to indicate whether the needle plate is installed in place. The installation in place indicator is installed on the test box.

14. A testing device, characterized in that, Includes the needle plate mounting detection device according to any one of claims 1-13; The testing equipment also includes a mounting frame, on which the mold is mounted; The testing equipment also includes a base, and the mounting bracket is slidably connected to the base along the first direction; The testing equipment also includes a mold translation mechanism, which is mounted on the base. The mold translation mechanism is used to drive the mounting frame to reciprocate along the first direction, so that the mold can reciprocate along the first direction.

15. The testing equipment according to claim 14, characterized in that, The testing equipment also includes a mold rotation mechanism, which is mounted on the mounting frame. The mold rotation mechanism is used to drive the mold to rotate around a preset axis; wherein the preset axis extends along the first direction.

16. A method for detecting the installation of a needle plate, based on the needle plate installation detection device according to any one of claims 1-13, characterized in that, include: The needle plate is inserted into the insertion space; The multiple non-fixed test points are divided into multiple test regions; wherein each test region has the same number of test points; Some of the test points are set as conductive holes, and the remaining test points are set as non-conductive holes; the test area occupied by all the conductive holes is set as the detection area. The test regions are numbered sequentially, and all test points in each test region are numbered sequentially. Determine the number of non-conductive holes in the last test area of ​​the detection area to identify two dynamic test points; Based on the arrangement of all the test points of the fixture, the test area and corresponding number of the two dynamic test points are determined, and the switch between the two nodes of the two dynamic test points on the switch board is closed, so that the two dynamic test points are connected to the test circuit where the switch is located. A voltage is applied to the test circuit, and it is detected whether the test circuit forms a loop; if yes, it indicates that the two dynamic test points are conducting, the multiple sets of fixed test points are in the correct position, and the needle plate is installed in place; if no, it indicates that the two dynamic test points are not conducting, the multiple sets of fixed test points are not in the correct position, and the needle plate is not installed in place.

17. The needle plate installation detection method according to claim 16, characterized in that, Determining the number of non-conductive holes in the last test area of ​​the detection area to identify two dynamic test points includes: If the number of non-conductive holes in the last test area of ​​the detection area is less than or equal to 1, then the two frontmost test points of the next test area after the last test area of ​​the detection area are determined as the dynamic test points. If the number of non-conductive holes in the last test area of ​​the detection area is greater than or equal to 2, then the two test points at the last end of the last test area of ​​the detection area are determined as the dynamic test points.

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