CN216209273U

CN216209273U - Quality detection device for printed circuit board

Info

Publication number: CN216209273U
Application number: CN202122249898.4U
Authority: CN
Inventors: 刘金; 向源聪
Original assignee: Dongguan Haoyuanda Electronics Co ltd
Current assignee: Dongguan Haoyuanda Electronics Co ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-04-05
Anticipated expiration: 2031-09-16

Abstract

The utility model discloses a quality detection device for a printed circuit board, which comprises a base, a positioning mechanism, a clamping mechanism, a detection mechanism and a protective cover, wherein the positioning mechanism comprises a fixed blocking piece, a guide rail, a telescopic blocking piece and a movable positioning plate, the clamping mechanism comprises a parallel hydraulic cylinder, a hydraulic pump and a force sensor, the force sensor is arranged on the parallel hydraulic cylinder, the detection mechanism comprises a cross beam, a supporting beam, a motor and a test needle, and the test needle is arranged on the motor. The positioning mechanism positions the circuit board and fixes the circuit board through the clamping mechanism, the clamping mechanism can control the use of proper force according to the force obtained by the force sensor, and the test pin tests the circuit board under the action of the motor, the cross beam and the supporting beam after the circuit board is clamped.

Description

Quality detection device for printed circuit board

Technical Field

The utility model belongs to the field of quality detection of circuit boards, and particularly relates to a quality detection device for a printed circuit board.

Background

With the introduction of surface mount technology, the packaging density of circuit boards has increased dramatically. Therefore, even for a typical number of circuit boards of low density, automatic inspection of the circuit boards is not only essential but also economical. In the complex circuit board inspection, two common methods are the needle bed test method and the double probe or flying needle test method. The needle bed test method is that a probe with a spring is connected to each detection point on a circuit board. The springs provide 100-200g pressure to each probe to ensure good contact at each detection point, and such probe arrangements together are referred to as "needle beds". The needle bed tester equipment is expensive and difficult to maintain. The needles are arranged in different rows depending on the specific application. The flying probe tester does not rely on a pin pattern mounted on a fixture or holder. Based on this system, two or more probes are mounted on a tiny magnetic head that is freely movable in the x-y plane, and the test points are directly controlled by CADIGerber data.

However, the CADIGerber data only can control and install a very accurate circuit board, and if the circuit board is installed inaccurately, a test needle may not touch a contact point, so that a test error may be caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a quality detection device for a printed circuit board, and aims to solve the problem that the traditional quality detection device for the printed circuit board is inaccurate in detection.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a quality detection device that printed circuit board used, includes base, positioning mechanism, clamping mechanism, detection mechanism, protection casing, positioning mechanism includes fixed separation blade, guide rail, flexible separation blade and movable positioning board, clamping mechanism includes parallel hydraulic cylinder, hydraulic pump, force sensor installs on the parallel hydraulic cylinder, detection mechanism includes the crossbeam, a supporting beam, motor and test needle, the test needle is installed on the motor.

Preferably, the beam, all open the groove in the supporting beam the motor pass through the beam with the test needle links to each other, the motor on the supporting beam with the beam links to each other, the supporting beam is fixed on the base.

Preferably, a rack is arranged in the groove, a gear is arranged on an output shaft of the motor, and the motor is installed on the supporting beam and the cross beam through the matching of the gear and the gear.

Preferably, the movable positioning plate is arranged on the guide rail, a telescopic scale is marked on the guide rail, a positioning hole is formed in the telescopic scale, and a device matched with the positioning pin is arranged on the movable positioning plate.

Preferably, a door slot is formed in the protective cover, two opening and closing doors are installed in the door slot, a first round hole is formed in the door slot, a second round hole is formed in the opening and closing door, and the first round hole is rotatably connected with the second round hole through a rotating shaft.

Preferably, the test needle is internally provided with an electric sensor and a storage battery, and the test needle is mutually connected with the electric sensor and the storage battery in series.

Preferably, the storage battery is connected with the motor and the power supply through conducting wires.

Preferably, the motor is a dc motor.

Preferably, the test needle is fitted with an automatic modified focusing system.

Preferably, the support beam is provided with a slide rail, and the slide rail is connected with the planet carrier of the gear.

Compared with the prior art, the utility model has the beneficial effects that:

the traditional flying probe tester is composed of two or more test probes mounted on a small magnetic head which can move freely on an x-y plane, and the test points are directly controlled by CADIGerber data. However, the CADIGerber data only can control and install a very accurate circuit board, and if the circuit board is installed inaccurately, a test needle may not touch a contact point, so that a test error may be caused. The device adopts the automatic correction focusing system arranged on the test needle, and the system can automatically identify the test points on the circuit board, and can also accurately identify the test points on the circuit board even if the circuit board is inaccurately arranged.

Drawings

FIG. 1 is an overall view of the present invention;

FIG. 2 is an internal structural view of FIG. 1;

FIG. 3 is a view of the detection mechanism of FIG. 1;

FIG. 4 is a structural view of the positioning mechanism and clamping mechanism of FIG. 1;

FIG. 5 is a gear set up diagram of FIG. 1;

FIG. 6 is a schematic view of a support beam structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, a quality detection device for a printed circuit board includes a base 1, a positioning mechanism 2, a clamping mechanism 3, a detection mechanism 4, and a protective cover 5, wherein the positioning mechanism 2 includes a fixed block 21, a guide rail 22, a retractable block 23, and a movable positioning plate 24, the clamping mechanism 3 includes a parallel hydraulic cylinder 31, a hydraulic pump 32, a force sensor 33, and the force sensor 33 is installed on the parallel hydraulic cylinder 31, the detection mechanism 4 includes a beam 41, a support beam 42, a motor 43, and a test pin 44, and the test pin 44 is installed on the motor 43. The positioning mechanism 2 positions the circuit board and fixes the circuit board through the clamping mechanism 3, the clamping mechanism 3 can control and use proper force according to the force obtained by the force sensor 33, and a test needle is arranged on the motor 43 and the cross beam 41 after the circuit board is clamped and tests the circuit board under the action of the supporting beam 42.

The cross beam 41 and the supporting beam 42 are both provided with a slot 411, the motor 43 is connected with the test needle 44 through the cross beam 41, the motor 43 on the supporting beam 42 is connected with the cross beam 41, and the supporting beam 42 is fixed on the base 1. The motor 43 and the test pin 44 are arranged in the slot 411, so that the space is saved, the structure is more compact, and the stability of the system is improved by fixing the support beam 42 on the base 1.

A rack is arranged in the slot 411, a gear is arranged on an output shaft of the motor 43, and the motor 43 is arranged on the supporting beam 42 and the cross beam 41 through the matching of the rack and the gear. The motor 43 drives the gear to rotate so that the motor 43 and the test needle 44 move on the beam 41, and similarly, the beam 41 also moves on the support beam 42, so that the test needle 44 moves on three degrees of freedom.

The movable positioning plate 24 is installed on the guide rail 22, the guide rail 22 is marked with a telescopic scale 221, the telescopic scale 221 is provided with a positioning hole 222, and the movable positioning plate 24 is provided with a device matched with the positioning pin. The protective cover 5 is provided with a door slot 501, two opening and closing doors 502 are installed in the door slot 501, a first round hole 503 is formed in the door slot 501, a second round hole 504 is formed in the opening and closing door 502, and the first round hole 503 and the second round hole 504 are rotatably connected through a rotating shaft. Due to the arrangement of the opening and closing door 502, the whole detection device is protected, and meanwhile, detection work is convenient for workers.

The test needle 44 is internally provided with an electric sensor 440 and a storage battery 441, and the test needle 44 is mutually connected with the electric sensor 440 and the storage battery 441 in series. The battery 441 is used to store electric energy, and supplies electric energy to the motor 43 and the test pin 44 in case of power failure, and charges and discharges electricity when power is supplied.

The battery 441 is connected to the motor 43 and the power source through a wire. The space is saved.

The motor 43 is a dc motor. Matched with the battery 441.

The test pin 44 is fitted with an auto-modifying focusing system. The testing efficiency is improved, and meanwhile, the problem caused by inaccurate positioning is avoided.

The support beam 42 is provided with a slide rail 421, and the slide rail 421 is connected to the carrier of the gear.

The working principle of the device;

the positioning mechanism 2 positions the circuit board and fixes the circuit board through the clamping mechanism 3, the clamping mechanism 3 can control and use proper force according to the force obtained by the force sensor 33, and a test needle is arranged on the motor 43 and the cross beam 41 after the circuit board is clamped and tests the circuit board under the action of the supporting beam 42.

The benefits provided by the device;

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A quality detection device for printed circuit boards, the device characterized in that: including base (1), positioning mechanism (2), clamping mechanism (3), detection mechanism (4), protection casing (5), positioning mechanism (2) are including fixed separation blade (21), guide rail (22), flexible separation blade (23) and activity locating plate (24), clamping mechanism (3) are including parallel pneumatic cylinder (31), hydraulic pump (32), force sensor (33), install force sensor (33) on parallel pneumatic cylinder (31), detection mechanism (4) are including crossbeam (41), supporting beam (42), motor (43) and test needle (44), test needle (44) are installed on motor (43).

2. A quality inspection apparatus for a printed circuit board according to claim 1, wherein: crossbeam (41), all open slotted (411) in supporting beam (42) motor (43) pass through crossbeam (41) with test needle (44) link to each other, motor (43) on supporting beam (42) with crossbeam (41) link to each other, supporting beam (42) are fixed on base (1).

3. A quality inspection apparatus for a printed circuit board according to claim 2, wherein: a rack is arranged in the groove (411), a gear is arranged on an output shaft of the motor (43), and the motor (43) is installed on the supporting beam (42) and the cross beam (41) through matching of the rack and the gear.

4. A quality inspection apparatus for a printed circuit board according to claim 1, wherein: the movable positioning plate (24) is arranged on the guide rail (22), a telescopic scale (221) is marked on the guide rail (22), a positioning hole (222) is formed in the telescopic scale (221), and a device matched with the positioning pin is arranged on the movable positioning plate (24).

5. A quality inspection apparatus for a printed circuit board according to claim 1, wherein: be provided with a gate slot (501) on protection casing (5), install two door (502) that open and shut in gate slot (501), be provided with first round hole (503) on gate slot (501), be provided with second round hole (504) on door (502) that open and shut, first round hole (503) with second round hole (504) are connected through the pivot rotation.

6. A quality inspection apparatus for a printed circuit board according to claim 1, wherein: the electric sensor (440) and the storage battery (441) are arranged in the test needle (44), and the test needle (44), the electric sensor (440) and the storage battery (441) are mutually connected in series.

7. A quality inspection apparatus for a printed circuit board according to claim 6, wherein: the storage battery (441) is connected with the motor (43) and a power supply through leads.

8. A quality inspection apparatus for a printed circuit board according to claim 1, wherein: the motor (43) is a direct current motor.

9. A quality inspection apparatus for a printed circuit board according to claim 1, wherein: the test needle (44) is equipped with an automatic modified focusing system.

10. A quality inspection apparatus for a printed circuit board according to claim 1, wherein: the supporting beam (42) is provided with a sliding rail (421), and the sliding rail (421) is connected with a planet carrier of the gear.