A circuit board welding detection device

Abstract

The present invention discloses a circuit board welding detection device, which belongs to the field of circuit board detection, including a wave crest detection platform, a detection unit is arranged on the top of the wave crest detection platform, and is used to detect the welding state of the pins when the circuit board is selectively welded, and a distinguishing placement unit is arranged on the top of the wave crest detection platform, and a distinguishing driving mechanism is used to place and drive the circuit board to the detection area, and to distinguish and place the circuit board after the detection. The present invention detects whether tin leakage occurs by contacting the pins through the pin expansion sheet when the detection driving base and the detection driving slider rise synchronously, and displays the detection result through the detection circuit, and then when the detection driving slider slides upward alone, it contacts the bottom of the gap between the pins of the circuit board, and displays whether the bridge connection tin occurs during the wave crest soldering of the pins, so that the soldering condition at the pins of the circuit board during the wave crest soldering can be conveniently detected, so as to achieve the effect of improving the detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board detection, and in particular to a circuit board welding detection device. Background Art

[0002] When high-density double-sided printed circuit boards are soldered, since they have a certain amount of through holes and plug-in components, selective wave soldering is often used for them. This soldering method is called selective soldering, which has the advantages of small thermal shock to the printed circuit board, small amount of flux spraying and reliable welding.

[0003] At present, when soldering plug-in components (such as plug-in pin rows and capacitors and inductors), the circuit board will move slowly at the top of the solder surge or the liquid tin combination ratio problem will cause the liquid tin to bridge with each other during the wave soldering process, resulting in a short circuit between the pins of the plug-in components at the welding position. When the solder surge fluctuates, the liquid tin will not be able to weld the pins and the tube holes tightly, resulting in the phenomenon of solder leakage and tin dropping.

[0004] Currently, the through-hole welding is detected by image recognition methods (such as CCD image recognition and AOI image recognition technology). However, since the image recognition method magnifies the welding part, that is, the welding pin, it is necessary to repeatedly adjust the printed circuit board when observing the remaining welding parts in order to identify the welding condition of the area blocked by the pin shadow, which makes the detection process more cumbersome and increases the detection time.

[0005] Therefore, a circuit board welding detection device is now proposed. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that the existing image recognition technology needs to repeatedly adjust the printed circuit board when observing the other welding parts in order to identify the welding conditions of the area blocked by the pin shadow, resulting in a more cumbersome detection process, and to propose a circuit board welding detection device.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A circuit board welding detection device comprises a wave crest detection platform for detecting pins when selectively welding the circuit board, a detection unit is arranged on the top of the wave crest detection platform, the detection unit is composed of a wave crest detection mechanism and a detection drive mechanism, the wave crest detection mechanism is used to detect the welding state of the pins when selectively welding the circuit board, and the detection drive mechanism is used to drive the detection of the wave crest detection mechanism;

[0009] A differential placement unit is arranged on the top of the wave crest detection platform, and the differential placement unit is composed of a differential driving mechanism and a differential control mechanism. The differential driving mechanism is used to place and drive the circuit board to the detection area, and the differential control mechanism is used to control the differential driving mechanism to perform differential placement on the detected circuit board.

[0010] Preferably, the detection drive mechanism includes an electric cylinder arranged inside the wave peak detection platform, a detection drive bracket is arranged on the side of the electric cylinder, and a detection drive tube is fixedly connected to the top of the electric cylinder, and the inner wall of the detection drive tube is sealingly and slidably connected to the detection drive base.

[0011] Preferably, the peak detection mechanism includes a detection drive slider which is sealingly and slidably connected to the inner wall of the detection drive base, a detection circuit is arranged inside the detection drive base, the bottom of the detection drive slider is sealingly and slidably connected to the detection drive base through a sealing slide rod, a resistance spring is sleeved on the outer surface of the sealing slide rod, the side wall of the detection drive slider is electrically connected to the detection circuit, and a detection touch fork is arranged on the top of the detection drive slider.

[0012] Preferably, an electrical connection contact piece is provided on the top of the detection drive base, a detection contact piece electrically connected to the electrical connection contact piece is provided on the side wall of the detection drive slider, and a detection blocking block is provided on the top of the detection drive tube to limit the lower half of the detection drive base.

[0013] Preferably, a pin expansion piece is fixedly connected to the inner wall of the detection drive base, and an outer side wall of the pin expansion piece is provided with an expansion limiting ring fixed to the inner wall of the detection drive base.

[0014] Preferably, the distinguishing drive mechanism includes a stable bracket fixedly installed inside the peak detection platform, a stepper motor is fixedly installed on the bottom of the stable bracket, the outer surface of the stepper motor output shaft is provided with a stable driving bracket fixed inside the peak detection platform, the inner wall of the stable driving bracket is slidably connected with a driving sliding base, and the top of the stable driving bracket is provided with a driving turntable fixed to the stepper motor output shaft.

[0015] Preferably, a circuit board placement table is provided on the side of the driving sliding base away from the stepper motor output shaft, an arc-shaped driving groove is opened on the inner wall of the driving turntable, and the top of the driving sliding base is slidably connected to the arc-shaped driving groove through a driving lifting slider.

[0016] Preferably, the differential control mechanism includes a control hydraulic cylinder fixed on the top of the driving turntable, the side wall of the control hydraulic cylinder is fixedly connected to a drive control hydraulic pipe, and an electromagnetic control valve is arranged inside the drive control hydraulic pipe, and one end of the drive control hydraulic pipe away from the control hydraulic cylinder is fixedly connected to a sub-control hydraulic cylinder.

[0017] Preferably, the inner wall of the sub-control hydraulic cylinder is sealingly and slidably connected with a sub-control extrusion arc block adapted to the arc driving groove, and the descending sub-control extrusion arc block touches the driving lifting slider.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In view of the problem that the existing image recognition technology mentioned above needs to repeatedly adjust the printed circuit board when observing the other welding parts in order to identify the welding conditions of the area blocked by the pin shadow, which reduces the detection efficiency, a detection drive base, a detection drive slider and a detection touch fork and other devices are arranged to cooperate with each other. When the detection drive base and the detection drive slider rise synchronously, the pin expansion sheet contacts the pin to detect whether tin drop and solder leakage occur, and the detection result is displayed through the detection circuit. Then, when the detection drive slider slides upward alone, it contacts the bottom of the gap between the pins of the circuit board to display whether bridge tin connection occurs during wave soldering of the pins. Therefore, the solder condition at the pins of the circuit board during wave soldering can be conveniently detected, thereby achieving the effect of improving the detection efficiency.

[0020] 2. By setting up a stepper motor, a driving sliding base and a driving turntable to cooperate with each other, when the circuit board is subjected to wave peak detection, it is placed on the top of the circuit placement table, and the driving turntable is driven by the stepper motor to rotate, so that the driving sliding base slides toward the detection position and stops at the detection position. The result of the detection by the wave peak detection mechanism is used to control whether the electromagnetic control valve at the corresponding position in the differential control mechanism is turned on or off, so that after the stepper motor is started again, the driving sliding base is driven to move to the qualified area to collect the qualified circuit boards. Then, when the stepper motor rotates in the opposite direction, the defective circuit boards are driven to move to the outside of the detection position, and the circuit board placement table of the qualified circuit boards is left empty, so that the circuit board to be detected can be placed on the top thereof for detection, thereby achieving the effect of differential driving and differential placement of the circuit boards.

[0021] 3. By setting up the pin expansion piece, expansion limiting ring and detection drive base and other devices to cooperate with each other, after the wave soldering inspection of the circuit board pins is completed, when the detection drive base is driven down by the electric cylinder, the tin-dropped part on the outer surface of the pin is scraped off by the funnel-shaped pin expansion piece, so that the pin here can be re-soldered after the circuit board here is classified as a defective product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a circuit board welding detection device proposed by the present invention;

[0023] Figure 2An exploded view of the internal structure of a circuit board welding detection device proposed by the present invention;

[0024] Figure 3 A schematic diagram of the internal structure of a cross section of a detection drive tube and a detection drive base of a circuit board welding detection device proposed by the present invention;

[0025] Figure 4 For the present invention Figure 3 A magnified view of the structure at center A;

[0026] Figure 5 A schematic diagram of the internal structure of a sub-control hydraulic cylinder and a driving sliding base cross section of a circuit board welding detection device proposed by the present invention;

[0027] Figure 6 The present invention provides a schematic diagram of the structure of a detection drive slider of a circuit board welding detection device.

[0028] In the figure: 1. wave crest detection platform; 2. electric cylinder; 21. detection drive bracket; 22. detection drive tube; 23. detection drive base; 231. electrical connection contact piece; 232. pin expansion piece; 233. expansion limit ring; 3. detection drive slider; 31. sealing slide bar; 311. resistance spring; 32. detection touch fork; 33. detection contact piece; 34. detection blocking block; 4. stable bracket; 41. stepper motor; 42. stable drive bracket; 43. drive sliding base; 431. drive lifting slider; 432. compression spring; 44. drive turntable; 441. arc drive groove; 5. control hydraulic cylinder; 51. drive control hydraulic tube; 52. electromagnetic control valve; 53. sub-control hydraulic cylinder; 54. sub-control extrusion arc block. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Reference Figure 1-6A circuit board welding detection device includes a wave crest detection platform 1 for detecting pins when the circuit board is selectively welded. A detection unit is arranged on the top of the wave crest detection platform 1. The detection unit consists of a wave crest detection mechanism and a detection drive mechanism. The wave crest detection mechanism is used to detect the welding state of the pins when the circuit board is selectively welded. The detection drive mechanism is used to drive the detection of the wave crest detection mechanism. A differential placement unit is arranged on the top of the wave crest detection platform 1. The differential placement unit consists of a differential drive mechanism and a differential control mechanism. The differential drive mechanism is used to place and drive the circuit board to the detection area. The differential control mechanism is used to control the differential drive mechanism to perform differential placement on the detected circuit board.

[0031] like Figure 1 and Figure 2 As shown, the detection drive mechanism includes an electric cylinder 2 arranged inside the wave peak detection platform 1, a detection drive bracket 21 is arranged on the side of the electric cylinder 2, and a detection drive tube 22 is fixedly connected to the top of the electric cylinder 2, and the inner wall of the detection drive tube 22 is sealed and slidably connected to a detection drive base 23; Figure 3 As shown, the peak detection mechanism includes a detection drive slider 3 which is sealingly and slidably connected to the inner wall of the detection drive base 23, a detection circuit is arranged inside the detection drive base 23, the bottom of the detection drive slider 3 is sealingly and slidably connected to the detection drive base 23 through a sealing slide rod 31, a resistance spring 311 is sleeved on the outer surface of the sealing slide rod 31, the side wall of the detection drive slider 3 is electrically connected to the detection circuit, and a detection touch fork 32 is arranged on the top of the detection drive slider 3.

[0032] Through the above technical scheme, an electrical connection contact piece 231 is provided on the top of the detection drive base 23, a detection contact piece 33 electrically connected to the electrical connection contact piece 231 is provided on the side wall of the detection drive slider 3, a detection blocking block 34 for limiting the lower half of the detection drive base 23 is provided on the top of the detection drive tube 22, a pin expansion piece 232 is fixedly connected to the inner wall of the detection drive base 23, and an expansion limiting ring 233 fixed to the inner wall of the detection drive base 23 is provided on the outer wall of the pin expansion piece 232, and the top of the pin expansion piece 232 is fixedly connected to the inner wall of the detection drive base 23, so that when tin falling occurs on the pin and the tin falling part is moved to the bottom of the pin expansion piece 232, when the peak detection mechanism is restored to its original position, the tin falling part can be removed through the pin expansion piece 232.

[0033] Based on the above, after the circuit board is moved to the detection position, the detection drive base 23 is driven to slide upward by the electric cylinder 2, and during the rising process of the detection drive base 23, the funnel-shaped detection position formed by the pin expansion piece 232 first contacts the pin where the tin drop phenomenon occurs, thereby conducting the detection circuit here and sending a signal that the wave soldering of the pin here is unqualified, and then the detection drive base 23 rises to the detection blocking block 34, and the electric cylinder 2 continuously increases the pressure in the detection drive tube 22 until it is greater than the downward pressure of the resistance spring 311 on the sealing slide rod 31, driving the detection drive slider 3 to slide upward, so that the detection contact piece 33 is away from the electrical contact piece 231, and rises through the detection touch fork 32 to contact the bottom of the circuit board, and when a bridge tinning phenomenon occurs between the two pins, the detection touch fork 32 conducts the detection circuit through the tinning of the bridge position, sends a signal that the wave soldering of the pin here is unqualified, and completes the detection operation of the pin welding during the wave soldering of the circuit board;

[0034] Further based on the above, the detection circuit is an existing breakpoint detection circuit. During the rising process of the detection drive base 23, some pins are in contact with the pin expansion piece 232, and some contact parts turn on the breakpoint detection circuit and send out a detection failure signal. When the detection drive base 23 continues to rise, all pins are in contact with the pin expansion piece 232. At this time, the breakpoint detection circuit is fully turned on, waiting for the detection drive slider 3 to rise, so that the detection contact piece 33 is out of contact with the electrical contact piece 231, and the detection circuit is disconnected. When the bridging tinning situation between the pins is detected, the detection circuit here is turned on and a detection failure signal is sent out. When all pins are in contact with the pin expansion piece 232 and the detection touch fork 32 cannot pass through the bridging part of the tinning connection detection circuit at the first time, a detection pass signal is sent out to complete the detection process of whether the circuit board has tin drop and solder leakage phenomenon and bridging tinning phenomenon.

[0035] like Figure 2 and Figure 5 As shown, the driving mechanism includes a stable bracket 4 fixedly installed inside the wave peak detection platform 1, a stepper motor 41 is fixedly installed at the bottom of the stable bracket 4, the outer surface of the output shaft of the stepper motor 41 is provided with a stable driving bracket 42 fixed inside the wave peak detection platform 1, the inner wall of the stable driving bracket 42 is slidably connected with a driving sliding base 43, and the top of the stable driving bracket 42 is provided with a driving turntable 44 fixed to the output shaft of the stepper motor 41.

[0036] Through the above technical solution, a circuit board placement table with a clamping assembly is provided on the side of the driving sliding base 43 away from the output shaft of the stepping motor 41, an arc-shaped driving groove 441 is opened on the inner wall of the driving turntable 44, and the top of the driving sliding base 43 is slidably connected to the arc-shaped driving groove 441 through a driving lifting slider 431, and a compression spring 432 is fixed to the bottom of the driving lifting slider 431.

[0037] Based on the above, the stepper motor 41 is started to drive the driving turntable 44 to rotate synchronously, thereby driving the driving sliding base 43 to slide towards the stepper motor 41, moving the circuit board to the detection position, and completing the placement driving operation before the circuit board detection.

[0038] like Figure 5 As shown, the differential control mechanism includes a control hydraulic cylinder 5 fixed on the top of the driving turntable 44, a driving control hydraulic pipe 51 is fixedly connected to the side wall of the control hydraulic cylinder 5, and an electromagnetic control valve 52 is arranged inside the driving control hydraulic pipe 51, and a sub-control hydraulic cylinder 53 is fixedly connected to one end of the driving control hydraulic pipe 51 away from the control hydraulic cylinder 5.

[0039] Through the above technical scheme, the inner wall of the sub-control hydraulic cylinder 53 is sealed and slidably connected with a sub-control extrusion arc block 54 adapted to the arc driving groove 441, and the descending sub-control extrusion arc block 54 touches the driving lifting slider 431. After the sub-control extrusion arc block 54 squeezes the driving lifting slider 431 downward, it does not provide driving force for the sliding of the driving sliding base 43 here when the driving turntable 44 rotates. After the sub-control extrusion arc block 54 rises, the extrusion driving lifting slider 431 is restored to the height of the sliding connection with the arc driving groove 441 under the action of the compression spring 432, so that the driving sliding base 43 here is provided with driving force when the driving turntable 44 rotates. In the process of differential placement work after the differential control mechanism and the differential placement mechanism participate in the detection, the peak detection mechanism is reset by the detection drive mechanism, and no hindrance is caused to the subsequent differential placement work after the differential control.

[0040] Based on the above, when the final inspection result of the wave soldering of the circuit board is qualified, the stepper motor 41 is started to continue to rotate inward, and the driving turntable 44 drives the driving sliding base 43 to slide in the direction close to the stepper motor 41, so that the circuit board moves to the qualified area. When the final inspection result of the wave soldering of the circuit board is defective, the electromagnetic control valve 52 here is first turned on to control the hydraulic cylinder 5 to inject pressure into the driving control hydraulic pipe 51 here, so that the sub-control extrusion arc block 54 in the sub-control hydraulic cylinder 53 squeezes the driving lifting slider 431, so that when the driving During the process of wave soldering qualified circuit boards to the qualified area, the defective circuit boards are not driven. Then, after the qualified circuit boards are driven to the qualified area, the sub-control extrusion arc block 54 is controlled to rise, so that the driving lifting slider 431 is slidably connected with the inner wall of the driving turntable 44, and then the driving sliding base 43 is driven to move away from the stepping motor 41 by starting the stepping motor 41 to rotate in the reverse direction, so that the defective circuit boards slide outward with the driving sliding base 43 to the original position where the circuit boards are placed. This is the process of differentiating the placement position of the circuit boards after the circuit board inspection and driving;

[0041] Further based on the above, after the qualified wave soldering circuit boards are moved to the qualified area, the circuit boards are collected by the existing collecting device, so that after driving the sliding base 43 to slide outward to the original position where the circuit boards are placed, the defective circuit boards are moved to the outside of the inspection position to wait for collection, and after the qualified circuit boards are collected, the qualified circuit board placement table is exposed, and the circuit boards to be inspected can be replaced.

[0042] When the present invention performs wave soldering inspection on the circuit board, the circuit board is placed on the top of the circuit board placement table and clamped and stabilized by the clamping assembly, and then the stepper motor 41 is started to drive the driving turntable 44 to rotate synchronously, thereby driving the driving sliding base 43 to slide in the direction close to the stepper motor 41, and the circuit board is moved to the inspection position. This is the placement and driving process before the circuit board is inspected;

[0043] After the circuit board is moved to the detection position, the electric cylinder 2 drives the detection driving base 23 to slide upward, so that the pins of the circuit board after wave soldering can fit with the pin expansion sheet 232, so as to detect whether there is instability in the wave soldering process of the circuit board, resulting in the failure of liquid tin to climb to the pin plug-in position of the circuit board, and the phenomenon of tin leakage and tin falling. This is the preliminary detection process of the tin liquid of the circuit board wave soldering pin;

[0044] Based on the above, during the rising process of the detection drive base 23, the funnel-shaped detection part formed by the pin expansion piece 232 first contacts the pin where the tin drop phenomenon occurs, thereby turning on the detection circuit here and sending a signal that the wave soldering of the pin here is unqualified. Then, when the detection drive base 23 rises to the detection blocking block 34, the electric cylinder 2 continuously increases the pressure in the detection drive tube 22 until it is greater than the downward pressure of the resistance spring 311 on the sealing slide bar 31, driving the detection drive slider 3 to slide upward, so that the detection contact piece 33 is away from the electrical connection contact piece 231, and rises through the detection touch fork 32 to contact the bottom of the circuit board. When a bridge tinning phenomenon occurs between the two pins, the detection touch fork 32 turns on the detection circuit through the tinning of the bridge part, and sends a signal that the wave soldering of the pin here is unqualified. This is the detection process of pin soldering during wave soldering of the circuit board;

[0045] After the wave crest detection mechanism detects whether the corresponding circuit board on the top is qualified, the distinguishing control mechanism controls the distinguishing driving mechanism to drive the driving sliding base 43 to move to the corresponding position. The specific process is as follows: when the final detection result of the wave crest soldering of the circuit board is qualified, the stepper motor 41 is started to continue to rotate inward, and the driving turntable 44 drives the driving sliding base 43 to slide in the direction close to the stepper motor 41, so that the circuit board moves to the qualified area. When the final detection result of the wave crest soldering of the circuit board is defective, the electromagnetic control valve 52 here is first turned on to control the hydraulic cylinder 5 to inject pressure into the driving control hydraulic pipe 51 here, so that the sub-control hydraulic The sub-controlled extrusion arc block 54 in the cylinder 53 squeezes and drives the lifting slider 431, so that in the process of driving the qualified wave soldering circuit board to the qualified area, the defective circuit board is not driven. Then, after driving the qualified circuit board to the qualified area, the sub-controlled extrusion arc block 54 is controlled to rise, so that the driving lifting slider 431 is slidably connected with the inner wall of the driving turntable 44, and then the stepper motor 41 is started to rotate in the opposite direction, driving the driving sliding base 43 to move away from the stepper motor 41, so that the defective circuit board slides outward with the driving sliding base 43 to the original position where the circuit board is placed. This is the differential control and driving process of the placement position after the circuit board is detected.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A circuit board welding detection device, comprising a wave crest detection station (1) for detecting pins during selective welding of a circuit board, characterized in that: The top of the wave crest detection platform (1) is provided with a detection unit, the detection unit is composed of a wave crest detection mechanism and a detection drive mechanism, the wave crest detection mechanism is used to detect the welding state of the pins at the time of selective welding of the circuit board, and the detection drive mechanism is used to drive the detection of the wave crest detection mechanism; The top of the wave crest detection platform (1) is provided with a differential placement unit, the differential placement unit is composed of a differential driving mechanism and a differential control mechanism, the differential driving mechanism is used to place and drive the circuit board to the detection area, and the differential control mechanism is used to control the differential driving mechanism to differentially place the detected circuit board; The distinguishing driving mechanism comprises a stabilizing bracket (4) fixedly mounted inside the wave peak detection platform (1), a stepping motor (41) fixedly mounted at the bottom of the stabilizing bracket (4), a stabilizing driving bracket (42) fixed inside the wave peak detection platform (1) is arranged on the outer surface of the output shaft of the stepping motor (41), a driving sliding base (43) is slidably connected to the inner wall of the stabilizing driving bracket (42), and a driving rotating disk (44) fixed to the output shaft of the stepping motor (41) is arranged on the top of the stabilizing driving bracket (42); A circuit board placement table with a clamping assembly is provided on the side of the driving sliding base (43) away from the output shaft of the stepping motor (41); an arc-shaped driving groove (441) is provided on the inner wall of the driving turntable (44); the top of the driving sliding base (43) is slidably connected to the arc-shaped driving groove (441) via a driving lifting slider (431); and a compression spring (432) is fixed to the bottom of the driving lifting slider (431); The differential control mechanism comprises a control hydraulic cylinder (5) fixed to the top of the driving rotary disk (44); a drive control hydraulic pipe (51) is fixedly connected to the side wall of the control hydraulic cylinder (5); an electromagnetic control valve (52) is arranged inside the drive control hydraulic pipe (51); and a sub-control hydraulic cylinder (53) is fixedly connected to one end of the drive control hydraulic pipe (51) away from the control hydraulic cylinder (5); The inner wall of the sub-control hydraulic cylinder (53) is sealingly and slidably connected with a sub-control extrusion arc block (54) adapted to the arc driving groove (441), and the descending sub-control extrusion arc block (54) contacts the driving lifting slide block (431).

2. A circuit board welding detection device according to claim 1, characterized in that: The detection drive mechanism comprises an electric cylinder (2) arranged inside a wave peak detection platform (1), a detection drive bracket (21) being arranged on the side of the electric cylinder (2), and the electric cylinder (2) is fixedly connected to a detection drive tube (22) through the detection drive bracket (21), and the inner wall of the detection drive tube (22) is sealed and slidably connected to a detection drive base (23).

3. A circuit board welding detection device according to claim 2, characterized in that: The wave peak detection mechanism comprises a detection drive slider (3) which is sealingly slidably connected to the inner wall of a detection drive base (23); a detection circuit is arranged inside the detection drive base (23); the bottom of the detection drive slider (3) is sealingly slidably connected to the detection drive base (23) via a sealing slide rod (31); a resistance spring (311) is sleeved on the outer surface of the sealing slide rod (31); the side wall of the detection drive slider (3) is electrically connected to the detection circuit; and a detection touch fork (32) is arranged on the top of the detection drive slider (3).

4. A circuit board welding detection device according to claim 3, characterized in that: The top of the detection drive base (23) is provided with an electrical connection contact piece (231), the side wall of the detection drive slider (3) is provided with a detection contact piece (33) electrically connected to the electrical connection contact piece (231), and the top of the detection drive tube (22) is provided with a detection blocking block (34) for limiting the lower half of the detection drive base (23).

5. A circuit board welding detection device according to claim 4, characterized in that: The inner wall of the detection drive base (23) is fixedly connected with a pin expansion piece (232), and the outer wall of the pin expansion piece (232) is provided with an expansion limiting ring (233) fixed to the inner wall of the detection drive base (23).

Images