TWI545320B - Percussion test fixture - Google Patents

Description

Knock test fixture

The present invention relates to a test fixture, and more particularly to a tap test fixture for automatically controlling a tap test.

PRINTING CIRCUIT BOARD (PCB) is a common electronic component nowadays. It is characterized in that it does not pass through external physical wires. The electronic components inserted in the circuit board can be laid through the circuit board. Electrically connected to other electronic components, in addition to reducing the physical circuit settings to save space, the printed circuit board can be designed according to the type of electronic components in the electronic device and the functions to be implemented by the electronic device before fabrication. The circuit layout, and then the printed circuit board according to the design results, can reduce the surface area of the printed circuit board to the minimum required to meet the customer's requirements, in order to meet the trend of the current miniaturization of electronic products.

In addition, the printed circuit board can be mass-produced through the printing process, thereby reducing the manufacturing cost and more in line with the economic benefits of the electronics industry. Due to the above advantages, printed circuit boards have become an indispensable electronic component in the current electronic related industry, and the industrial demand is extremely large.

The manufacturing process of the printed circuit board, as described above, after the circuit design is completed, the circuit pattern must be generated by printing, etching, punching, etc., and the electronic components are soldered to the printed circuit board through soldering techniques such as soldering or silver soldering. The soldering step can be achieved by Surface Mount Technology (SMT) or Wave soldering. However, some printed circuit boards are due to the circuit during the manufacturing process Poor positioning or deformation of the board, resulting in insufficient soldering of electronic components during soldering is generally referred to as "empty soldering", meaning that electronic components cannot be tightly connected to the board through soldering, so the electronic components on the board may be oscillating, External force impact or other factors cause poor contact between the electronic components and the circuit board, short circuit, and even the electronic components falling off the circuit board.

In order to avoid the sale of such an empty soldering board to the customer, the board manufacturer must perform a tap test before the product leaves the factory to ensure the quality of the product. At present, the tapping detection method adopted by the industry is to directly test the specific position of the back surface of the printed circuit board by a special glue stick for a certain number of times, and then put the printed circuit board into an electronic test instrument for circuit detection to test Whether the circuit board after tapping has poor contact or short circuit, the entire tap detection program relies entirely on manual work, so the accuracy of the force, time and position of the tap cannot be accurately controlled.

In addition, the tapping area is also unpredictable and uncontrollable due to human factors, and cannot be precisely controlled at the same point or on the same surface, and it is highly probable that the board is damaged due to excessive force of the tester. . At the same time, since the front surface of the circuit board is electrically disposed with a plurality of electronic components, it cannot be horizontally placed when the tapping test is performed, resulting in uneven stress on the back side of the tested circuit board during the tapping test. It may also affect the correctness of the tap test.

In view of the above problems, the present invention provides a tapping test fixture that does not need to be struck by human beings, so as to solve the problem that the tapping test can not be mastered by manual tapping test, and the test result may have an excessively significant error. problem.

The invention discloses a tap test fixture suitable for a circuit board to be tested and tapped The test fixture comprises a base and a tapping component, wherein the base is used for placing the circuit board to be tested thereon, the tapping component comprises a controller and a power group, and the power pack has a power source and an actuating component. The power source is electrically connected to the controller, the actuating member is connected to the power source, and the striker is movably connected to the actuating member. During the tapping test, the controller sends an electrical signal to activate the power source, the power source drives the actuator to actuate to drive the striker to reciprocate, and the striker intermittently strikes the circuit board to be tested.

The utility model has the advantages that the power source of the tap test fixture is driven by the actuation of the controller according to the activation of the controller, and the actuating member further drives the striker to reciprocate and intermittently taps the circuit board to be tested, through the invention. The precision control of the mechanical control allows the tapping force and the number of strokes of the tapping test to be standardized to reduce the error in human operation, and can effectively improve the tapping test standards of different types of circuit boards. The accuracy of the test and the time required for testing can be reduced.

The features, implementations, and utilities of the present invention are described in detail below with reference to the drawings.

The tapping test fixture 10 of each embodiment of the present invention is applicable to a circuit board 50 to be tested. The circuit board 50 to be tested has a plurality of positioning holes 501 extending therethrough. The position of the positioning hole 501 depends on the circuit board 50 to be tested. The type and electrical position of the electronic component disposed on the circuit board 50 to be tested are different, and are not limited to the various types disclosed in the present invention.

In the first embodiment, please refer to the schematic diagram shown in FIG. 1, and please refer to the test diagram of FIG. 2, the side view of FIG. 3, and the circuit block diagram of FIG.

The tapping test fixture 10 of the first embodiment of the present invention includes a base 100 and a tapping assembly 200. The base 100 is used to place the circuit board 50 to be tested thereon. The tapping component 200 further includes a controller 201. A power pack 202, a striker 2023, and a force meter 203. The power pack 202 has a power source 2021 and an actuator 2022. The power source 2021 is electrically connected to the controller 201, the actuator 2022 is connected to the power source 2021, and the striker 2023 is movably connected to the actuator 2022.

It should be noted that the power source 2021 of the embodiment includes, but is not limited to, a power device such as a gas pump, a motor or a motor, and any power device capable of generating kinetic energy and driving the actuating member 2022 connected thereto can be a power source. 2021, a person of ordinary skill in the art can use different devices depending on the test requirements.

At the same time, the tapper 2023 of the embodiment further has a tapping portion 2024, and the tapping portion 2024 is designed as a rounded structure, and the material of the tapper 2023 and the tapping portion 2024 are all plastic materials or other elastic materials. The material of the characteristic is to avoid damage to the electronic components on the circuit board 50 to be tested due to improper application or improper tapping position during the tapping test.

In addition to the mechanical structure of the test fixture 10, the controller 201 of the present embodiment controls the actuation of the actuator 2022 through the electrical connection with the power source 2021, and further drives the striker. 2023 reciprocating displacement. The controller 201 further has a counter 2011 for setting the number of taps of the tapper 2023.

In addition, the force gauge 203 is coupled between the actuating member 2022 and the taper 2023 to control the tapping test force of the tapper 2023. Generally, when performing a tap test, the tapping force is set between 0.1 kg and 5 kg, but this is not limit. In addition, the counter 2011 and the force meter 203 described in this embodiment may also be integrated into the controller 201, and the detecting personnel only need to set the tapping force and the number of tapping times on the controller 201 that integrates the counter 2011 and the function of the force meter 203. Yes, the cumbersome procedure of setting is reduced, and the detection efficiency is effectively improved.

The tap test fixture 10 of the present embodiment further includes a test switch 300 and an emergency stop switch 400. The test switch 300 is electrically connected to the controller 201. When the test switch 300 is actuated by the tester, the test switch 300 electrically transmits a test signal to the controller 201 to turn on the power source 2021 to perform the operation.

The test switch 300 of the embodiment has two start buttons, and the two start buttons must be pressed or turned on at the same time to enable the tap test fixture 10 of the present invention. This design is to prevent the tester from placing the test. When the circuit board 50 and the hand have not left the susceptor 100, the test switch 300 is erroneously activated to cause accidental injury. Therefore, the test switch 300 must be started with both hands to enhance the safety of the operator during the test.

Similarly, the emergency stop switch 400 is also designed under the same safety considerations. The emergency stop switch 400 of the embodiment is electrically connected to the controller 201, and when there is a mechanical failure or accident in the tap detection process, the tester The emergency stop switch 400 can be actuated, and the emergency stop switch 400 electrically transmits a stop signal to the controller 201 to emergency stop the power source 2021 to operate, and after the mechanical failure or accidental elimination, restart the tap test of the present invention. Fixture 10 enhances the safety of the operator during testing.

When the tester performs the circuit board tap test with the tap test fixture 10 of the first embodiment, the circuit board 50 to be tested is first placed on the susceptor 100, and the power to be tested is made. The specific position of the road board 50 to be subjected to the tap test is aligned with the tapping portion 2024 of the tapper 2023, and the tester sets the number of taps and the striking force path through the counter 2011 on the controller 201 and the force gauge 203.

After the setting is completed, the tester simultaneously presses the test switch 300 with both hands, at which time the test switch 300 is actuated and electrically transmits the test signal to the controller 201. After receiving the test signal, the controller 201 sends an electrical signal to activate the power source 2021, and the power source 2021 drives the actuating member 2022 to actuate. The actuating member 2022 drives the striker 2023 connected to the movable device to reciprocate and knock. The hitting portion 2024 intermittently taps a specific position of the circuit board 50 to be tested according to the set number of taps and the striking force. If there is any accident or malfunction during the tapping test, the tester can activate the emergency stop switch 400 at any time to stop the test fixture 10 in an emergency stop to ensure the safety of the test process, and also avoid the improper use of the circuit board 50 to be tested. Tested and damaged.

In the second embodiment of the present invention, please refer to the perspective view shown in FIG. 5, and refer to the test schematic diagram of FIG. 6, the side view of FIG. 7, and the partial enlarged view of FIG.

The structure of the tapping tester of the second embodiment is substantially similar to that of the first embodiment, except that in this embodiment, in addition to the components disclosed in the first embodiment, the base 100 further includes a platform 110, and the platform The 110 is movable up and down (two-dimensional direction) with respect to the susceptor 100. After the circuit board 50 to be tested is placed on the platform 110, the tester can move the platform 110 arbitrarily, so that the striker 2023 can perform a tap test on each test position of the circuit board 50 to be tested.

The platform 110 of the embodiment has a plurality of positioning posts 1101 and fixing members 1102, and the positioning posts 1101 are corresponding to the positioning holes 501 on the circuit board 50 to be tested, and The position of the positioning post 1101 is relatively adjusted according to different types of circuit boards 50 to be tested. When the circuit board to be tested 50 is disposed on the platform 110, the positioning posts 1101 are respectively disposed through the positioning holes 501 of the circuit board 50 to be tested to fix the circuit board 50 to be tested, so as to prevent the circuit board 50 to be tested from being subjected to the tap test. A bias situation occurs. At the same time, the positioning post 1101 can also buffer the impact of the tapping portion 2024, effectively avoiding the damage or failure of the circuit board 50 to be tested caused by the impact force.

In addition, the fixing member 1102 of the platform 110 is respectively connected to the base 100 and the platform 110 to fix the platform 110 on the base 100. The fixing member 1102 fixes the base 100 by means of, but not limited to, screw locking, clamping or nylon. In the manner of Velcro, it is only necessary to achieve the function of temporarily fixing the platform 110, so as to prevent the platform 110 from being displaced due to the impact during the tapping test, thereby affecting the correctness of the tapping test and facilitating the test after the test is completed. The platform 110 is separate from the base 100.

When the tester performs the circuit board tap test with the tap test fixture 10 of the second embodiment, the test board 50 is first fixed to the platform 110 through the positioning post 501 through the positioning hole 501, and then the mobile platform is moved. 110, until the specific position of the circuit board 50 to be tested for the tap test is aligned with the tap portion 2024 of the tapper 2023. Then, the platform 110 is fixed to the base 100 through the fixing member 1102, and the test procedure as recited in the first embodiment described above is performed.

After completing the test of the first tap point, the tester can loosen the fixture 1102 to allow the platform 110 to move freely in a two-dimensional direction so that the circuit board 50 to be tested is to perform a specific test under the tap test. The position is aligned with the tap portion 2024 of the tapper 2023 for a second tap test.

In the third embodiment, please refer to the three-dimensional diagram shown in Figure 9, and please Referring to the test diagram of FIG. 10 and the side view of FIG. 11, the tap test fixture 10 of the present embodiment is substantially similar to the second embodiment, except that the components of the second embodiment are different from the second embodiment. The outer controller 201 further has a first adjusting member 204 and a second adjusting member 205.

The first adjusting member 204 of the third embodiment controls the striking speed of the striking device 2023 toward the circuit board 50 to be tested, thereby controlling the tapping frequency of the tapper 2023. The faster the striker 2023 is moving away from the circuit board 50 to be tested, the shorter the interval between the taps of the tap 2023 is, that is, the tapping frequency is relatively high; on the contrary, the tapping The tap frequency of the device 2023 is relatively low.

The second adjusting member 205 of the third embodiment controls the displacement speed of the tapper 2023 toward the circuit board 50 to be tested, and the second adjusting member 205 can also control the frequency of tapping by the tapper 2023. The principle is as before. As mentioned, the applicant does not repeat this. At the same time, the second adjusting member 205 can also adjust the displacement speed of the tapper 2023 toward the circuit board 50 to be tested, and the force meter 203 adjusts the tapping force of the tapper 2023 to achieve the most accurate test and upgrade test. Quality.

It is to be noted that the first adjusting member 204 and the second adjusting member 205 of the embodiment may be integrated into the controller 201 as described in the first embodiment, and the detecting personnel only The speed of the striking device 2023 away from and toward the circuit board 50 to be tested can be adjusted on the controller 201 integrated with the first adjusting member 204 and the second adjusting member 205, thereby reducing the cumbersome procedure of setting and effectively improving the detecting. effectiveness.

Through the tapping test fixture 10 of the embodiments disclosed in the present invention, the tester does not need to manually tap the circuit board 50 to be tested for testing, and only needs to operate the tapping test. The test fixture 10 can perform a tap test on a specific test position of the circuit board 50 to be tested, and can be knocked on the different test positions on the circuit board 50 by the displacement of the platform 110 in a two-dimensional direction. Tests are performed for the most complete test and are not subject to excessive human error factors to obtain the most accurate test results.

At the same time, the first adjusting member 204, the second adjusting member 205, the force meter 203 and the counter 2011 disclosed in the present invention can also be adjusted and set for different circuit boards 50 to be tested, thereby controlling the tapper simply and quickly. 2023's tapping force, tapping frequency and number of taps to meet the test requirements, greatly improve the detection efficiency, and also avoid damage to the board under test 50 during the test.

After the above-mentioned tapping test process, the tester connects the circuit board 50 to be tested to other circuit testing instruments to detect whether the circuit board 50 to be tested can still operate normally after being subjected to the tapping test, or is short-circuited. Problems such as poor contact, in order to screen out defective products that may be freely welded, to achieve the purpose of improving product quality.

Although the embodiments of the present invention are disclosed above, it is not intended to limit the present invention, and those skilled in the art, regardless of the spirit and scope of the present invention, the shapes, structures, and features described in the scope of the present application. And the number of modifications may be made, and the scope of patent protection of the present invention shall be determined by the scope of the patent application attached to the specification.

10‧‧‧Knock test fixture

100‧‧‧Base

110‧‧‧ platform

1101‧‧‧Positioning column

1102‧‧‧Fixed parts

200‧‧‧Knocking components

201‧‧‧ Controller

2011‧‧‧Counter

202‧‧‧Power Group

2021‧‧‧Power source

2022‧‧‧Acoustic

2023‧‧‧Patter

2024‧‧‧Knocking Department

203‧‧‧ force meter

204‧‧‧First adjustment piece

205‧‧‧Second adjustment piece

300‧‧‧Test switch

400‧‧‧Emergency stop switch

50‧‧‧Device board to be tested

501‧‧‧Positioning holes

Fig. 1 is a perspective view showing a tapping test jig according to a first embodiment of the present invention.

Fig. 2 is a schematic view showing the test of the tap test fixture of the first embodiment of the present invention.

Fig. 3 is a side view showing the tapping test jig of the first embodiment of the present invention.

Figure 4 is a block diagram showing the circuit block of the tap test fixture of the first embodiment of the present invention. Figure.

Fig. 5 is a perspective view showing a tapping test jig according to a second embodiment of the present invention.

Figure 6 is a schematic view showing the test of the tap test fixture of the second embodiment of the present invention.

Fig. 7 is a side view showing a tapping test jig according to a second embodiment of the present invention.

Fig. 8 is a partially enlarged view showing a tapping test jig according to a second embodiment of the present invention.

Fig. 9 is a perspective view showing a tapping test jig according to a third embodiment of the present invention.

Figure 10 is a schematic view showing the test of the tap test fixture of the third embodiment of the present invention.

Figure 11 is a side view showing a tapping test jig according to a third embodiment of the present invention.

10‧‧‧Knock test fixture

100‧‧‧Base

200‧‧‧Knocking components

201‧‧‧ Controller

2011‧‧‧Counter

202‧‧‧Power Group

2022‧‧‧Acoustic

2023‧‧‧Patter

2024‧‧‧Knocking Department

203‧‧‧ force meter

300‧‧‧Test switch

400‧‧‧Emergency stop switch

Claims (8)

A tap test fixture is applicable to a circuit board to be tested, the tap test fixture includes: a base for placing the circuit board to be tested thereon; and a tapping component, including: a control a power unit having a power source and an actuating member electrically connected to the controller, wherein the actuating member is coupled to the power source; and a striker operatively coupled to the actuating member The controller sends an electrical signal to activate the power source, the power source drives the actuating member to actuate to drive the tapper to reciprocate, and the tapper intermittently taps the circuit board to be tested The controller has a first adjusting member for controlling the displacement speed of the tapper in a direction away from the circuit board to be tested, and the controller further has a second adjusting member for controlling the tapper toward the standby Measure the displacement speed in the direction of the board. The tapping test fixture of claim 1, wherein the base further comprises a platform, the platform is reciprocally displaced relative to the base, and the circuit board to be tested is placed on the platform. The tapping test fixture of claim 2, wherein the platform further has a plurality of positioning posts, the circuit board to be tested has a plurality of positioning holes, and when the circuit board to be tested is disposed on the platform, the same The positioning posts are respectively passed through the positioning holes. The tap test fixture of claim 2, further comprising a fixing member coupled to the base and the platform to fix the platform on the base. The tap test fixture of claim 1, wherein the controller further has a counter that sets the number of taps of the tap. The tapping test fixture of claim 1, wherein the tapping component further comprises a force gauge connected between the actuating member and the tapper, the force gauge controlling the tapper Tap the power. The tap test fixture of claim 1, further comprising a test switch electrically connected to the controller, the test switch being selectively activated, the test switch electrically transmitting a test signal to the The controller activates the power source to perform the operation. The tap test fixture of claim 1, further comprising an emergency stop switch electrically connected to the controller, the emergency stop switch being selectively actuated, and the emergency stop switch electrically transmitting a stop Signal to the controller to stop the power source.