SMT circuit board floating detection device

Abstract

The utility model discloses a kind of SMT circuit board float high detection device, it is related to circuit board detection technical field, the device includes bottom plate, fixed shaft is rotatably arranged on bottom plate, shaft end is equipped with the carrying turntable of rectangular clamping slot for carrying circuit board, and its step rotation is driven by intermittent mechanism;U-shaped cover is fixed on bottom plate, hollow cylinder in its top is slidably provided with the sliding column of installing infrared detection sensor, and sensor height is adjusted by swing arm mechanism.The utility model realizes accurate indexing feeding by intermittent mechanism formed by cam and poking tooth, and realizes the stable adjustment of sensor height using swing arm mechanism and hollow cylinder guide, and the structure has good synergy, with the advantages of high detection precision, stable operation, strong adaptability etc..

Description

Technical Field

[0001] This utility model relates to the field of circuit board testing technology, and in particular to an SMT circuit board floating height detection device. Background Technology

[0002] In the SMT (Surface Mount Technology) production process, after the circuit board and components are soldered, a specific height standard must be maintained between the pins or body and the pads. Any abnormal height or tilt can lead to serious quality defects such as cold solder joints and short circuits. Traditionally, the detection of such height issues has relied heavily on manual visual inspection or contact measurements using simple calipers and plug gauges. These methods are not only inefficient and labor-intensive, but also highly susceptible to errors introduced by the operator's subjective judgment, resulting in poor consistency and limited accuracy of the test results. This makes it difficult to meet the stringent requirements of modern electronics manufacturing for high-efficiency and standardized quality control.

[0003] To improve the level of automation in inspection, some inspection equipment using fixed sensors has emerged in the industry. However, these devices often lack a convenient and effective height adjustment mechanism, making it difficult to quickly adapt to circuit boards of different thicknesses or specifications. Furthermore, in terms of circuit board transfer and positioning, many devices suffer from complex structures, unstable positioning accuracy, or significant impacts during movement, affecting the accuracy of the inspection station and the stability of equipment operation. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art, and to propose a technology for an SMT circuit board floating height detection device.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution: A floating height detection device for SMT circuit boards includes a base plate, a through-type fixed shaft rotatably inserted in the middle of the base plate, a loading turntable fixedly sleeved on the top of the fixed shaft, a plurality of evenly distributed rectangular slots on the top surface of the loading turntable, a circuit board placed in each rectangular slot, and an intermittent mechanism for driving the fixed shaft to rotate intermittently installed on the base plate. A U-shaped cover is fixed on the base plate. A hollow cylinder is fixed in the middle of the top surface of the U-shaped cover. A sliding column is slidably inserted inside the hollow cylinder. An infrared detection sensor is fixedly installed at the bottom end of the sliding column. The detection end of the infrared detection sensor faces the circuit board on the corresponding side. A swing arm mechanism for driving the sliding column to rise and fall is installed on the U-shaped cover.

[0006] Preferably, a fixing plate is fixedly sleeved at the bottom end of the fixing shaft, and a plurality of evenly distributed fixing pins are fixed on the bottom surface of the fixing plate.

[0007] Preferably, the intermittent mechanism includes a cam and a prying tooth. A motor with its output end facing downward is fixedly installed on the bottom surface of the base plate. A cam is fixedly sleeved on the end of the motor shaft of the motor. A prying tooth is fixedly provided on one end of the cam. The outer surface of the cam slides against a pair of adjacent fixed pins. The prying tooth alternately pries the corresponding fixed pins to drive the fixed disk to rotate intermittently.

[0008] Preferably, the top surface of the U-shaped cover is fixedly provided with a fixed ear seat, and the top end of the fixed ear seat is hinged with a pair of fixed swing arms, and the front end of each fixed swing arm is provided with an elliptical pin hole.

[0009] Preferably, the swing arm mechanism includes a single ear seat and a limiting pin. The top end of the sliding column is fixedly provided with a single ear seat, the top end of the single ear seat extends between the front ends of a pair of fixed swing arms, and the top end of the single ear seat is fixedly inserted with a limiting pin. The two ends of the limiting pin are slidably inserted into a pair of elliptical pin holes.

[0010] Preferably, a double-ear seat is fixed on the back of the U-shaped cover, and an electric telescopic cylinder is hinged in the opening of the double-ear seat. The telescopic rod end of the electric telescopic cylinder extends between the rear ends of a pair of fixed swing arms, and the telescopic rod end of the electric telescopic cylinder is movably hinged to the rear ends of a pair of fixed swing arms.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. In this utility model, the automatic step-by-step conveying of circuit boards is realized through the synergistic effect of the carrying turntable and the intermittent mechanism. The circuit board to be inspected is precisely positioned in the rectangular slot, and the carrying turntable is driven by the intermittent mechanism to rotate in an indexing manner, so that the circuit board passes through the inspection station in sequence. This design replaces the traditional manual loading and unloading, realizes a continuous and automated inspection process, significantly improves inspection efficiency and work cycle, and reduces the labor intensity of operators. 2. In this utility model, the swing arm mechanism driven by the electric telescopic cylinder and the hollow cylinder that provides stable guidance enable the infrared detection sensor to perform precise vertical lifting and lowering. This mechanism can cleverly convert the linear thrust of the electric telescopic cylinder into the smooth linear motion of the sliding column through the fixed swing arm and the limiting pin, thereby quickly and accurately adjusting the distance between the sensor and the circuit board surface. This flexible adjustment capability allows the device to easily adapt to the detection requirements of circuit boards of different thicknesses, ensuring the consistency of the measurement benchmark and effectively improving the detection accuracy. In summary, the overall structural design of this utility model integrates motion control and precision detection. The cam and actuating gear in the intermittent mechanism work together to ensure the accuracy and locking of the indexing motion of the load turntable; while the combination of the swing arm mechanism and the hollow cylinder guide ensures the stability and reliability of the sensor position. This highly coordinated mechanical linkage mechanism not only makes the detection process smooth and stable, but also significantly improves the reliability and repeatability of the entire detection device under long-term continuous operation, resulting in excellent overall performance. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model (excluding the circuit board); Figure 3 This is a schematic diagram of the overall structure of this utility model from another perspective; Figure 4 This is a cross-sectional view of the overall structure of this utility model; Figure 5 For the present utility model Figure 4 Explosion-proof diagram of the structure; Figure 6 This is a schematic diagram of the intermittent mechanism of this utility model; Figure 7 This is a schematic diagram of the swing arm mechanism of this utility model; The following are the serial numbers in the diagram: 100, base plate; 101, fixed shaft; 102, cargo turntable; 103, rectangular slot; 104, circuit board; 105, fixed plate; 106, fixed pin; 107, motor; 108, cam; 109, actuating gear; 200, U-shaped cover; 201, hollow cylinder; 202, sliding column; 203, infrared detection sensor; 204, single ear seat; 205, limit pin; 206, fixed ear seat; 207, fixed swing arm; 208, elliptical pin hole; 209, electric telescopic cylinder. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Example: This example provides an SMT circuit board floating height detection device, see [link to example]. Figures 1 to 7Specifically, it includes a base plate 100, with a through-type fixed shaft 101 rotatably inserted in the middle of the base plate 100. The rotation of the fixed shaft 101 directly drives the load turntable 102 to rotate in increments. The load turntable 102 is fixedly sleeved on the top of the fixed shaft 101. Several evenly distributed rectangular slots 103 are opened on the top surface of the load turntable 102. Each rectangular slot 103 contains a circuit board 104. The rectangular slots 103 on the load turntable 102 are used to accurately position and store the circuit boards 104 to be tested, and drive them to step through the testing station. The base plate 100 is also equipped with an intermittent mechanism that drives the fixed shaft 101 to rotate intermittently. A U-shaped cover 200 is fixed on the base plate 100. A hollow cylinder 201 is fixed in the middle of the top surface of the U-shaped cover 200. The hollow cylinder 201 provides guidance for the sliding column 202 to ensure the verticality and stability of its lifting and lowering movement. The sliding column 202 is slidably inserted inside the hollow cylinder 201. The sliding column 202 serves as the mounting bracket for the infrared detection sensor 203. Its lifting and lowering movement directly determines the detection height of the sensor. The infrared detection sensor 203 is fixedly installed at the bottom end of the sliding column 202. The infrared detection sensor 203 serves as the core detection element and is used to non-contactly measure the floating height data of the circuit board 104. The detection end of the infrared detection sensor 203 faces the circuit board 104 on the corresponding side. A swing arm mechanism for driving the lifting and lowering adjustment of the sliding column 202 is installed on the U-shaped cover 200.

[0015] In the specific implementation process, such as Figure 5 and Figure 6 As shown, the intermittent mechanism includes a cam 108 and a prying tooth 109. A fixed disk 105 is fixedly sleeved at the bottom end of the fixed shaft 101. The fixed disk 105 transmits intermittent motion to the fixed shaft 101. Several evenly distributed fixed pins 106 are fixedly mounted on the bottom surface of the fixed disk 105. The fixed pins 106 convert the continuous rotation of the motor 107 into the intermittent rotation of the fixed disk 105. A motor 107 with its output end facing downward is fixedly installed on the bottom surface of the base plate 100. A cam 108 is fixedly sleeved at the end of the motor shaft of the motor 107. The outer surface of the cam 108 slides against the fixed pins 106 to provide positioning and locking, ensuring stability during intermittent rotation. A prying tooth 109 is fixedly mounted at one end of the cam 108. The prying tooth 109 periodically actuates the fixed pins 106, thereby generating intermittent motion. The outer surface of the cam 108 slides against a pair of adjacent fixed pins 106, and the prying tooth 109 alternately actuates the corresponding fixed pins 106 to drive the fixed disk 105 to rotate intermittently.

[0016] It should be noted that: such as Figure 5 and Figure 7As shown, the swing arm mechanism includes a single ear seat 204 and a limiting pin 205. A fixed ear seat 206 is fixedly provided on the top surface of the U-shaped cover 200. A pair of fixed swing arms 207 are hinged to the top of the fixed ear seat 206. The fixed swing arms 207 convert the linear thrust of the electric telescopic cylinder 209 into the arc motion of the limiting pin 205. Each fixed swing arm 207 has an elliptical pin hole 208 at its front end. A single ear seat 204 is fixedly provided at the top of the sliding column 202. The top of the single ear seat 204 extends between the front ends of the pair of fixed swing arms 207. A limiting pin 205 is fixedly inserted at the top of the single ear seat 204. The two ends of the limiting pin 205 are slidably inserted into a pair of elliptical pin holes 208. The limiting pin 205 converts the swing of the fixed swing arm 207 into the linear motion of the sliding column 202. The back of the U-shaped cover 200 is fixed with a double ear seat. An electric telescopic cylinder 209 is hinged in the opening of the double ear seat. The telescopic rod end of the electric telescopic cylinder 209 extends to the rear end of a pair of fixed swing arms 207. The telescopic rod end of the electric telescopic cylinder 209 is movably hinged to the rear end of a pair of fixed swing arms 207. The electric telescopic cylinder 209 drives the entire swing arm mechanism to move through telescopic movement, thereby realizing the automatic adjustment of the height of the infrared detection sensor 203.

[0017] The working principle of this embodiment is as follows: First, the installation height of the infrared detection sensor 203 is adjusted accordingly based on the thickness of the circuit board 104 to be detected. When the telescopic rod of the electric telescopic cylinder 209 is activated, it will drive a pair of fixed swing arms 207 to swing around the hinge point between them and the fixed ear seat 206. Since the two ends of the limiting pin 205 are respectively slidably set in a pair of elliptical pin holes 208, the swing motion will be converted into a precise displacement of the single ear seat 204 in the vertical direction, thereby driving the sliding column 202 to move smoothly up and down along the hollow cylinder 201, and finally realizing the precise setting of the detection distance between the infrared detection sensor 203 and the surface of the circuit board 104. After the detection height is set, the motor 107 is started. Its output shaft drives the cam 108 and the actuating tooth 109 to rotate synchronously. During the rotation, the outer peripheral surface of the cam 108 always maintains sliding contact with the adjacent fixed pin 106 at the bottom of the fixed disk 105, while the actuating tooth 109 periodically actuates the corresponding fixed pin 106, thereby driving the fixed disk 105 and the fixed shaft 101 fixed thereto to perform intermittent rotational motion. The intermittent rotation of the fixed shaft 101 further drives the turntable 102 to rotate in the same rhythm. In the actual testing process, the operator places multiple circuit boards 104 to be tested one by one into the rectangular slots 103 of the turntable 102. As the turntable 102 rotates intermittently, each circuit board 104 is sequentially transported to the testing station below the infrared detection sensor 203. The infrared detection sensor 203 performs float height detection on the circuit board 104 at this position, thereby achieving efficient and automated continuous testing operations.

[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A surface mount height detection device for SMT circuit boards, comprising a base plate (100), characterized in that: A fixed shaft (101) is rotatably inserted through the middle of the base plate (100). A loading turntable (102) is fixedly sleeved on the top of the fixed shaft (101). Several evenly distributed rectangular slots (103) are opened on the top surface of the loading turntable (102). A circuit board (104) is placed in each rectangular slot (103). An intermittent mechanism for driving the fixed shaft (101) to rotate intermittently is installed on the base plate (100). A U-shaped cover (200) is fixed on the base plate (100). A hollow cylinder (201) is fixed in the middle of the top surface of the U-shaped cover (200). A sliding column (202) is slidably inserted inside the hollow cylinder (201). An infrared detection sensor (203) is fixedly installed at the bottom end of the sliding column (202). The detection end of the infrared detection sensor (203) faces the circuit board (104) on the corresponding side. A swing arm mechanism for driving the sliding column (202) to rise and fall is installed on the U-shaped cover (200).

2. The SMT circuit board floating height detection device according to claim 1, characterized in that: The bottom end of the fixed shaft (101) is fixedly fitted with a fixed plate (105), and a number of evenly distributed fixed pins (106) are fixed on the bottom surface of the fixed plate (105).

3. The SMT circuit board floating height detection device according to claim 2, characterized in that: The intermittent mechanism includes a cam (108) and a prying tooth (109). A motor (107) with its output end facing downward is fixedly installed on the bottom surface of the base plate (100). The motor shaft end of the motor (107) is fixedly fitted with a cam (108). A prying tooth (109) is fixedly provided at one end of the cam (108). The outer surface of the cam (108) slides against a pair of adjacent fixed pins (106). The prying tooth (109) alternately pries the corresponding fixed pin (106) to drive the fixed disk (105) to rotate intermittently.

4. The SMT circuit board floating height detection device according to claim 1, characterized in that: The top surface of the U-shaped cover (200) is fixedly provided with a fixed ear seat (206), and a pair of fixed swing arms (207) are hinged to the top of the fixed ear seat (206). Each fixed swing arm (207) has an elliptical pin hole (208) at its front end.

5. The SMT circuit board floating height detection device according to claim 4, characterized in that: The swing arm mechanism includes a single ear seat (204) and a limiting pin (205). The top end of the sliding column (202) is fixedly provided with the single ear seat (204). The top end of the single ear seat (204) extends between the front ends of a pair of fixed swing arms (207). The top end of the single ear seat (204) is fixedly inserted with the limiting pin (205). The two ends of the limiting pin (205) are slidably inserted into a pair of elliptical pin holes (208).

6. The SMT circuit board floating height detection device according to claim 4, characterized in that: The back of the U-shaped cover (200) is fixed with a double ear seat, and an electric telescopic cylinder (209) is hinged in the opening of the double ear seat. The telescopic rod end of the electric telescopic cylinder (209) extends between the rear ends of a pair of fixed swing arms (207), and the telescopic rod end of the electric telescopic cylinder (209) is movably hinged to the rear ends of a pair of fixed swing arms (207).

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