Circuit board thickness detection device

Abstract

The invention discloses a circuit board thickness detection device, which belongs to the technical field of circuit board thickness detection and comprises an instrument base, a supporting base body mounted on one side of the instrument base, a first vertical telescopic device mounted on the upper side of the instrument base and a detector connected to the output end of the first vertical telescopic device. The first vertical telescopic device is used for controlling the detector to move in the normal direction of the circuit board and make contact with the upper surface of the circuit board, the supporting base body is arranged below the detector, and the supporting base body is used for supporting the circuit board from the lower side of the circuit board when the detector detects; the detector comprises a detection rod and four probe assemblies installed at the lower end of the detection rod, and the four probe assemblies are distributed at four points of a rectangle of the lower end plane of the detection rod. The thickness gauge can effectively measure the thickness of the circuit board in the conveying process, reduces the damage to the circuit board, and improves the measurement precision and efficiency of the circuit board.

Description

Technical Field

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

[0002] The thickness of a circuit board is critical to its installation and function in an electronic device. If the circuit board is too thick, it may not fit properly into the device's slot or housing, making it difficult to assemble the device or even damaging the housing. For example, in a smartphone, a circuit board that is thicker than the design specifications may prevent the back cover of the phone from closing properly. The right thickness can also ensure the stability of the electronic components on the circuit board during operation. A circuit board that is too thin may not be able to bear the weight of the components or may deform when subjected to slight external forces, affecting the electrical connection between components, resulting in circuit performance degradation or failure.

[0003] Some thickness gauges for circuit boards in the prior art use probes for thickness detection, but such probes are generally sharp. Especially for circuit boards in the conveying process, direct measurement of the circuit boards can easily cause deformation or even pierce the circuit boards, resulting in damage to the circuit boards and affecting the quality of the circuit boards. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a circuit board thickness detection device, which can effectively measure the thickness of the circuit board during transportation, reduce damage to the circuit board, and improve the measurement accuracy and efficiency of the circuit board.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: The present invention discloses a circuit board thickness detection device, comprising an instrument base, a support base installed on one side of the instrument base, a first vertical telescopic device installed on the upper side of the instrument base, and a detector connected to the output end of the first vertical telescopic device, wherein the first vertical telescopic device is used to control the normal displacement of the detector along the circuit board and to contact the upper surface of the circuit board, the support base is arranged below the detector, and the support base is used to support the circuit board from the lower side of the circuit board when the detector detects; the detector comprises a detection rod, four probe assemblies installed at the lower end of the detection rod, and the four probe assemblies are distributed on one side of the lower end plane of the detection rod. At four points of a rectangle, the probe assembly includes a probe rod, a probe seat, a transverse pivot, a transverse axis deflection reset device, a deflection rod, a longitudinal pivot, a longitudinal axis deflection reset device and a needle body. The probe rod is fixedly installed at the lower end of the detection rod, and the probe seat is connected to the lower end of the probe rod. A transverse pivot is fixed on the probe seat, the deflection rod is pivotally connected to the transverse pivot, a transverse axis deflection reset device is installed between the deflection rod and the probe seat, a longitudinal pivot is fixed on the deflection rod, the needle body is pivotally connected to the longitudinal pivot, a longitudinal axis deflection reset device is installed between the needle body and the deflection rod, and an angle is formed between the axis of the needle body and the axis of the detection rod.

[0006] Further, the first vertical telescopic device is connected to the detection rod of the detector through a first telescopic rail, the first telescopic rail includes a first guide rail, a first slide, a first rack, a first gear and a first motor, one end of the first guide rail is fixedly connected to the output end of the first vertical telescopic device, the other end of the first guide rail is slidably set in the first slide, the first slide is fixedly connected to the detector at one end away from the first vertical telescopic device, a first rack is fixed on the upper surface of the first guide rail, the first rack is meshed with the first gear, the first gear is connected to the output end of the first motor, and the first motor is fixed on the first slide.

[0007] Further, the supporting base includes a second telescopic rail and a supporting platform, the instrument base is connected to the supporting platform via the second telescopic rail, the second telescopic rail includes a second guide rail, a second slide, a second rack, a second gear and a second motor, one end of the second guide rail is connected to the instrument base, the other end of the second guide rail is slidably arranged in the second slide, the second slide is fixedly connected to the supporting platform at one end away from the instrument base, a second rack is fixed on the upper surface of the second guide rail, the second rack is meshed with the second gear, the second gear is connected to the output end of the second motor, and the second motor is fixed on the second slide.

[0008] Furthermore, the support platform includes a base, a platform body slidably mounted on the upper surface of the base, a cavity is formed between the platform body and the base, an airbag is installed in the cavity, and an elastic stretching device is also provided between the platform body and the base.

[0009] Furthermore, a second vertical telescopic device is installed on the instrument base, and an output end of the second vertical telescopic device is connected to the second guide rail.

[0010] Furthermore, a sheath is slidably provided on the outer side of the lower end of the detection rod, and the sheath is connected to the detection rod through an elastic supporting device, and the sheath is located on the outer sides of the four probe assemblies.

[0011] Furthermore, a bracket is fixed to the lower end of the sleeve, a rotating roller is rotatably mounted on the bracket, and the surface of the rotating roller protrudes from the lower end plane of the sleeve.

[0012] Furthermore, the circuit board thickness detection device also includes a safety trigger assembly, which includes a first hook rod, a torsional pre-stressing device, a pre-stressing roller and a tension sensor, one end of the first hook rod is hinged to the instrument base, the other end of the first hook rod is connected to the pre-stressing roller, the pre-stressing roller extends in the transverse direction, the first hook rod is connected to the instrument base through the torsional pre-stressing device, so that the working surface of the pre-stressing roller contacts the surface of the circuit board, and the first hook rod is also connected to the instrument base through the tension sensor.

[0013] Furthermore, the pre-pressing roller includes an inner rod and an outer roller, the outer roller is slidably mounted on the outer end of the inner rod, the inner end of the inner rod is connected to the first hook-shaped rod, the outer roller is fixedly connected to the second hook-shaped rod, the second hook-shaped rod is hinged with an inclined beam, and the upper end of the inclined beam is fixed to the second slide.

[0014] The beneficial effects of the present invention are: A circuit board thickness detection device disclosed in the present invention provides a first vertical telescopic device and a supporting base. When a detector detects the surface of the circuit board, the supporting base can be used to support the circuit board from the bottom of the circuit board during detection by the detector, thereby avoiding the problem of inaccurate detection caused by the extrusion deformation of the detector driven by the first vertical telescopic device. Therefore, the device disclosed in the present invention can improve the detection accuracy of the circuit board thickness.

[0015] During the detection process, the device of the present invention allows the entire needle body to move along the normal direction of the circuit board with the detection rod. Since there is an angle between the axis of the needle body and the axis of the detection rod, the circuit board can drive the needle body to rotate around the longitudinal pivot to make way, thereby avoiding the problem of the circuit board being pierced due to direct contact between the normal and the needle body, thereby reducing damage to the circuit board during detection.

[0016] During the detection process of the device of the present invention, the deflection rod can rotate around the transverse pivot with the transmission direction of the circuit board as the longitudinal direction, and the deflection rod can also make way in a plane parallel to the transmission direction of the circuit board, thereby reducing the damage to the circuit board caused by the ups and downs of the circuit board during transmission and the direct contact with the needle body, and the surface of the circuit board can be further protected.

[0017] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 It is a structural schematic diagram of a circuit board thickness detection device of the present invention; Figure 2 It is a front view of the circuit board thickness detection device of the present invention; Figure 3 is a schematic structural diagram of a first telescopic track; Figure 4 It is a schematic diagram of the structure of the detector; Figure 5 is a schematic diagram of the structure of the needle body; Figure 6 is a structural schematic diagram of the support platform; Figure 7 Schematic diagram of the structure of the sheath.

[0019] The markings in the accompanying drawings are as follows: instrument base 1, supporting base 2, first vertical telescopic device 3, detector 4, circuit board 5, detection rod 6, probe assembly 7, probe rod 8, probe seat 9, transverse pivot 10, transverse axis deflection reset device 11, deflection rod 12, longitudinal pivot 13, longitudinal axis deflection reset device 14, needle body 15, first guide rail 16, first slide 17, first rack 18, first gear 19, first motor 20, second guide rail 21, second slide 22, second rack 23, second gear 24, second motor 25, pedestal 26, pedestal 27, cavity 28, airbag 29, elastic stretching device 30, second vertical telescopic device 31, sheath 32, bracket 33, rotating roller 34, first hook rod 35, torsion preloading device 36, preloading roller 37, tension sensor 38, inner rod 39, outer roller 40, second hook rod 41, inclined beam 42, elastic supporting device 43. DETAILED DESCRIPTION

[0020] like Figures 1 to 7As shown, a circuit board thickness detection device disclosed in the present invention comprises an instrument base 1, a support base 2 installed on one side of the instrument base 1, a first vertical telescopic device 3 installed on the upper side of the instrument base 1, and a detector 4 connected to the output end of the first vertical telescopic device 3. The support base 2 is installed on the lower side of the instrument base 1 and is on the same side as the detector 4. The space between the support base 2 and the detector 4 is used for the circuit board 5 to be transmitted through. Therefore, the device of the present invention can adapt to the detection of the circuit board 5 during the transportation process. Of course, the transmission speed of the circuit board 5 is selected according to the needs. The first vertical telescopic device 3 adopts a cylinder, and the output direction of the cylinder is consistent with the direction of the circuit board 5, which can be easily controlled.

[0021] Among them, the first vertical telescopic device 3 is used to control the normal displacement of the detector 4 along the circuit board 5 and contact with the upper surface of the circuit board 5, so as to facilitate the detection of the thickness of the circuit board 5. The supporting base 2 is arranged below the detector 4, and the supporting base 2 is used to support the circuit board 5 from the lower side of the circuit board 5 when the detector 4 is detecting; the problem of inaccurate detection caused by the extrusion deformation of the detector 4 driven by the first vertical telescopic device 3 is avoided, so the device disclosed in the present invention can improve the detection accuracy.

[0022] The transmission direction of the circuit board 5 is the longitudinal direction, the width direction of the circuit board 5 corresponding thereto is the transverse direction, and the direction perpendicular to the surface of the circuit board 5 is the vertical direction. Specifically, the detector 4 disclosed in the present invention includes a detection rod 6, four probe assemblies 7 installed at the lower end of the detection rod 6, and the four probe assemblies 7 are distributed at four points of a rectangle on the lower end plane of the detection rod 6. The probe assembly 7 includes a probe rod 8, a probe seat 9, a transverse pivot 10, a transverse axis deflection reset device 11, a deflection rod 12, a longitudinal pivot 13, a longitudinal axis deflection reset device 14 and a needle body 15. The four probe assemblies 7 correspond to four groups of needle bodies 15, respectively, and the four groups of needle bodies 15 are numbered 1, 2, 3, and 4 in sequence. Among them, probes No. 1 and 4 are connected to a high-precision DC current-stabilized power supply to pass a known stable current into the circuit board 5; probes No. 2 and 3 in this embodiment are connected to a high-precision digital voltmeter or potentiometer to measure the voltage value at both ends of the circuit board 5 between probes No. 2 and 3 in this embodiment. The above test belongs to the prior art and should be understood by those skilled in the art.

[0023] Furthermore, the probe rod 8 is fixedly installed at the lower end of the detection rod 6, the extension direction of the probe rod 8 is vertical, and the probe seat 9 is connected to the lower end of the probe rod 8. In some other embodiments, the probe seat 9 can move horizontally relative to the probe rod 8, and the two are fixed by a locking piece, so that the position of the probe seat 9 can be adjusted, thereby adjusting the range of intervals between the four groups of needle bodies 15 to meet different needs.

[0024] A transverse pivot 10 is fixed on the probe seat 9, and the axis of the transverse pivot 10 is along the transverse direction. The deflection rod 12 is pivoted to the transverse pivot 10. A transverse axis deflection reset device 11 is installed between the deflection rod 12 and the probe seat 9. The transverse axis deflection reset device 11 adopts a coil spring, and the coil spring is sleeved on the outer side of the transverse pivot 10. A longitudinal pivot 13 is fixed on the deflection rod 12, and the axis of the longitudinal pivot 13 is along the longitudinal direction. The needle body 15 is pivoted to the longitudinal pivot 13. A longitudinal axis deflection reset device 14 is installed between the needle body 15 and the deflection rod 12, and there is an angle between the axis of the needle body 15 and the axis of the detection rod 6. After the needle body 15 gradually contacts the surface of the circuit board 5, the circuit board 5 can drive the needle body 15 to rotate around the longitudinal pivot 13 to make way, thereby avoiding the problem of the circuit board 5 being pierced due to the normal direct contact with the needle body 15, thereby reducing the damage to the circuit board 5 during detection.

[0025] In this embodiment, the first vertical telescopic device 3 is connected to the detection rod 6 of the detector 4 through the first telescopic track. The first telescopic track includes a first guide rail 16, a first slide 17, a first rack 18, a first gear 19 and a first motor 20. One end of the first guide rail 16 is fixedly connected to the output end of the first vertical telescopic device 3, and the other end of the first guide rail 16 is slidably arranged in the first slide 17. The first guide rail 16 can slide in the first slide 17 in the horizontal direction. The first slide 17 is fixedly connected to the detector 4 away from one end of the first vertical telescopic device 3. The first rack 18 is fixed on the upper surface of the first guide rail 16. The first rack 18 is meshed with the first gear 19. The first gear 19 is connected to the output end of the first motor 20, and the first motor 20 is fixed on the first slide 17. By setting the first telescopic track, the detector 4 can be extended outward in the horizontal direction, so that different horizontal positions of the circuit board 5 can be detected.

[0026] In this embodiment, the support base 2 includes a second telescopic rail and a support platform, the instrument base 1 is connected to the support platform via the second telescopic rail, the second telescopic rail includes a second guide rail 21, a second slide 22, a second rack 23, a second gear 24 and a second motor 25, one end of the second guide rail 21 is connected to the instrument base 1, the other end of the second guide rail 21 is slidably arranged in the second slide 22, the second slide 22 is fixedly connected to the support platform at one end away from the instrument base 1, the second rack 23 is fixed on the upper surface of the second guide rail 21, the second rack 23 is meshed with the second gear 24, the second gear 24 is connected to the output end of the second motor 25, and the second motor 25 is fixed on the second slide 22. By setting the second telescopic rail, the support platform can be extended outward in the lateral direction, so as to adapt to the change of the lateral position of the detector 4, and the circuit board 5 can be adaptively supported at different lateral positions.

[0027] In this embodiment, the support platform includes a base 26, a platform body 27 slidably mounted on the upper surface of the base 26, a cavity 28 is formed between the platform body 27 and the base 26, an air bag 29 is installed in the cavity 28, and an elastic stretching device 30 is also arranged between the platform body 27 and the base 26. An air pipe for connecting the air bag 29 is arranged at the bottom of the base 26. After the air bag 29 is inflated, the platform body 27 can be expanded outward, thereby providing an elastic support for the circuit board 5. The support strength is relatively large, which can ensure the stability of the circuit board 5 during detection. The elastic stretching device 30 adopts a tension spring. After the air bag 29 is deflated, the tension spring can drive the platform body 27 to return to its original position.

[0028] In this embodiment, a second vertical telescopic device 31 is installed on the instrument base 1, and the output end of the second vertical telescopic device 31 is connected to the second guide rail 21. The second vertical telescopic device 31 also uses a cylinder, which can drive the second guide rail 21 to adjust the vertical height, so as to support the circuit board 5, adapt to the support change of the circuit board 5 under the action of the support platform, make its surface tension, and facilitate detection.

[0029] In this embodiment, a sheath 32 is slidably provided on the outer side of the lower end of the detection rod 6, and the sheath 32 is connected to the detection rod 6 through an elastic support device 43. The sheath 32 is located on the outer side of the four probe assemblies 7. By providing the sheath 32, the sheath 32 can be in contact with the surface of the circuit board 5 before the needle body 15 contacts the circuit board 5, so as to ensure the flatness of the detection area.

[0030] In this embodiment, a bracket 33 is fixed to the lower end of the sheath 32, and a rotating roller 34 is rotatably mounted on the bracket 33. The surface of the rotating roller 34 protrudes from the lower end plane of the sheath 32, which can reduce the friction between the sheath 32 and the surface of the circuit board 5.

[0031] In this embodiment, the circuit board thickness detection device further includes a safety trigger assembly, which includes a first hook-shaped rod 35, a torsion pre-stressing device 36, a pre-stressing roller 37 and a tension sensor 38. The torsion pre-stressing device 36 uses a torsion spring. One end of the first hook-shaped rod 35 is hinged to the instrument base 1, and the other end of the first hook-shaped rod 35 is connected to the pre-stressing roller 37. The pre-stressing roller 37 extends in the transverse direction. The first hook-shaped rod 35 is connected to the instrument base 1 through the torsion pre-stressing device 36, so that the working surface of the pre-stressing roller 37 contacts the surface of the circuit board 5. The first hook-shaped rod 35 is also connected to the instrument base 1 through the tension sensor 38. The tension sensor 38 is connected to the controller of the first vertical telescopic device 3. When the tension sensor 38 is subjected to a large stress, it means that the circuit board 5 is moving. At this time, the controller controls the first vertical telescopic device 3 to retract upward, so that the detector 4 is away from the circuit board 5 to prevent damage to the circuit board 5.

[0032] In this embodiment, the pre-pressing roller 37 includes an inner rod 39 and an outer roller 40, the outer roller 40 is slidably sleeved on the outer end of the inner rod 39, the inner end of the inner rod 39 is connected to the first hook-shaped rod 35, the outer roller 40 is fixedly connected to the second hook-shaped rod 41, the second hook-shaped rod 41 is hinged with an inclined beam 42, and the upper end of the inclined beam 42 is fixed to the second slideway 22. Allowing the outer roller 40 to adapt to the changes in the outward extension and retraction of the detector 4 can improve the trigger sensitivity of the trigger assembly.

[0033] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A circuit board thickness detection device, characterized in that: The invention comprises an instrument base, a support base installed on one side of the instrument base, a first vertical telescopic device installed on the upper side of the instrument base, and a detector connected to the output end of the first vertical telescopic device, wherein the first vertical telescopic device is used to control the normal displacement of the detector along the circuit board and contact the upper surface of the circuit board, the support base is arranged below the detector, and the support base is used to support the circuit board from the lower side of the circuit board when the detector detects; the detector comprises a detection rod, four probe assemblies installed at the lower end of the detection rod, and the four probe assemblies are distributed at four points of a rectangle on the lower end plane of the detection rod, The probe assembly includes a probe rod, a probe seat, a transverse pivot, a transverse axis deflection reset device, a deflection rod, a longitudinal pivot, a longitudinal axis deflection reset device and a needle body. The probe rod is fixedly installed at the lower end of the detection rod, and the probe seat is connected to the lower end of the probe rod. A transverse pivot is fixed on the probe seat, and the deflection rod is pivotally connected to the transverse pivot. A transverse axis deflection reset device is installed between the deflection rod and the probe seat. A longitudinal pivot is fixed on the deflection rod, and the needle body is pivotally connected to the longitudinal pivot. A longitudinal axis deflection reset device is installed between the needle body and the deflection rod, and an angle is formed between the axis of the needle body and the axis of the detection rod.

2. A circuit board thickness detection device according to claim 1, characterized in that: The first vertical telescopic device is connected to the detection rod of the detector through a first telescopic rail. The first telescopic rail includes a first guide rail, a first slide, a first rack, a first gear and a first motor. One end of the first guide rail is fixedly connected to the output end of the first vertical telescopic device. The other end of the first guide rail is slidably arranged in the first slide. The first slide is fixedly connected to the detector at one end away from the first vertical telescopic device. A first rack is fixed on the upper surface of the first guide rail. The first rack is meshed with the first gear. The first gear is connected to the output end of the first motor. The first motor is fixed on the first slide.

3. A circuit board thickness detection device according to claim 2, characterized in that: The supporting base includes a second telescopic rail and a supporting platform, the instrument base is connected to the supporting platform via the second telescopic rail, the second telescopic rail includes a second guide rail, a second slide, a second rack, a second gear and a second motor, one end of the second guide rail is connected to the instrument base, the other end of the second guide rail is slidably arranged in the second slide, the second slide is fixedly connected to the supporting platform at one end away from the instrument base, a second rack is fixedly provided on the upper surface of the second guide rail, the second rack is meshed with the second gear, the second gear is connected to the output end of the second motor, and the second motor is fixed on the second slide.

4. A circuit board thickness detection device according to claim 3, characterized in that: The support platform comprises a base, a platform body slidably mounted on the upper surface of the base, a cavity is formed between the platform body and the base, an airbag is installed in the cavity, and an elastic stretching device is also arranged between the platform body and the base.

5. A circuit board thickness detection device according to claim 3, characterized in that: A second vertical telescopic device is installed on the instrument base, and an output end of the second vertical telescopic device is connected to the second guide rail.

6. A circuit board thickness detection device according to claim 1, characterized in that: A sheath is slidably arranged on the outer side of the lower end of the detection rod. The sheath is connected to the detection rod through an elastic supporting device, and the sheath is located on the outer sides of the four probe assemblies.

7. A circuit board thickness detection device according to claim 6, characterized in that: A bracket is fixed to the lower end of the sleeve, a rotating roller is rotatably mounted on the bracket, and the surface of the rotating roller protrudes from the lower end plane of the sleeve.

8. A circuit board thickness detection device according to any one of claims 2 to 7, characterized in that: The circuit board thickness detection device also includes a safety trigger assembly, which includes a first hook rod, a torsion pre-stressing device, a pre-stressing roller and a tension sensor, one end of the first hook rod is hinged to the instrument base, the other end of the first hook rod is connected to the pre-stressing roller, the pre-stressing roller extends in the transverse direction, the first hook rod is connected to the instrument base through the torsion pre-stressing device, so that the working surface of the pre-stressing roller contacts the surface of the circuit board, and the first hook rod is also connected to the instrument base through the tension sensor.

9. A circuit board thickness detection device according to claim 8, characterized in that: The pre-pressing roller includes an inner rod and an outer roller, the outer roller is slidably mounted on the outer end of the inner rod, the inner end of the inner rod is connected to the first hook-shaped rod, the outer roller is fixedly connected to the second hook-shaped rod, the second hook-shaped rod is hinged with an inclined beam, and the upper end of the inclined beam is fixed to the second slide.

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