CN115372804A

CN115372804A - PCB testing tool

Info

Publication number: CN115372804A
Application number: CN202211307647.XA
Authority: CN
Inventors: 刘平根; 刘爱华; 周建军; 朱晨曦
Original assignee: Hangzhou Kegong Electronic Technology Co ltd
Current assignee: Hangzhou Kegong Electronic Technology Co ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2022-11-22

Abstract

The invention discloses a PCB testing tool, which comprises a testing box, wherein a hot cavity and a cold cavity are arranged in the testing box, a heat insulation plate is arranged between the hot cavity and the cold cavity, the PCB testing tool also comprises a movable frame which is rotatably arranged in the testing box, the heat insulation plate comprises a movable heat insulation plate and fixed heat insulation plates which are arranged on two sides of the movable heat insulation plate, the movable heat insulation plate is in butt fit with the fixed heat insulation plates, the movable heat insulation plate is fixedly connected to the movable frame, the fixed heat insulation plates are fixedly connected to the testing box, and two surfaces of the movable frame, which are positioned on the movable heat insulation plate, are fixed positions for PCBs. The invention aims to solve the technical problem that the reliability of PCB temperature shock performance attenuation data is reduced because the rapid shock of the PCB test temperature can not be realized in the prior art, and provides a PCB test tool. The PCB can be rapidly switched between the hot cavity and the cold cavity so as to achieve the test purpose of temperature shock, and further improve the reliability of the test data of the attenuation of the temperature shock performance of the PCB.

Description

PCB testing tool

Technical Field

The invention relates to the technical field of PCB testing, in particular to a PCB testing tool.

Background

In the field of industrial control, a PCB is one of essential core components in various control systems as a support carrier for other electronic components and an electrical interconnection medium. Because it is made by electronic printing technology, it is required to endure various quality tests in the links of design and setting, proofing, mass production, shipment, etc. The temperature shock test of the PCB is particularly important, and the main purpose is to test the decay degree of the physical property and the chemical property of the PCB when the temperature suddenly changes.

However, in the existing temperature impact test, two test boxes need to be respectively set to work at high and low temperature points according to preset temperature, after the test time is up, the PCB needs to be transferred between the two temperature boxes manually within a specified time, and the purpose of the expected rapid sudden temperature change cannot be achieved, so that the reliability of physical property and chemical property decay data of the PCB during the sudden temperature change is reduced.

Disclosure of Invention

Technical problems to be solved by the invention

The invention aims to solve the technical problem that the reliability of PCB temperature shock performance attenuation data is reduced because the rapid shock of the PCB test temperature cannot be realized in the prior art, and provides a PCB test tool which can realize rapid switching of a PCB between a hot cavity and a cold cavity so as to achieve the test purpose of temperature shock and enable test data to be more accurate.

Technical scheme

In order to solve the problems, the technical scheme provided by the invention is as follows:

the utility model provides a PCB board test fixture, includes the test box, hot chamber and cold chamber have in the test box, be equipped with the heat insulating board between hot chamber and the cold chamber, still include rotatable install in the adjustable shelf in the test box, the heat insulating board includes the movable heat insulating board and locates the fixed heat insulating board of movable heat insulating board both sides, the movable heat insulating board cooperates with fixed heat insulating board butt, the movable heat insulating board link firmly in on the adjustable shelf, fixed heat insulating board link firmly on the test box, lie in on the adjustable shelf the two sides of movable heat insulating board are the fixed position of PCB.

Optionally, the movable heat shield is magnetically engaged with the fixed heat shield.

Optionally, the two sides of the movable heat insulation plate on the movable frame are both provided with a fixing structure, the fixing structure comprises a first rotating disk and a second rotating disk which are arranged at intervals, and the first rotating disk and the second rotating disk are both provided with a PCB plate clamping structure.

Optionally, a fan is disposed in each of the hot chamber and the cold chamber for facing the fixed structure.

Optionally, the movable frame is detachably mounted in the test box.

Optionally, the movable frame is installed in the test box in a drawing manner, a first movable opening for drawing the movable frame is formed in the test box, the movable frame comprises a first sealing plate for sealing the first movable opening, and the movable heat insulation plate is fixedly connected to the first sealing plate.

Optionally, the test box is provided with a second movable opening opposite to the first movable opening, the movable frame further comprises a second sealing plate for sealing the second movable opening, the second sealing plate is fixedly connected to the movable heat insulation plate, the test box is further provided with an accessible through the second movable opening to enter a sealing barrel in the test box and to push the sealing barrel to move to an elastic part in the test box and in butt fit with the fixed heat insulation plate, and one end of the sealing barrel is in butt fit with the second sealing plate.

Optionally, a convex edge is arranged at one end, far away from the second movable opening, of the sealing barrel, and the outer diameter of the convex edge is larger than the caliber of the second movable opening.

Optionally, a dustproof sleeve is fixedly connected to the outside of the test box, the dustproof sleeve covers the outside of the sealing barrel, and the inner diameter of the dustproof sleeve is consistent with the outer diameter of the convex edge.

Optionally, a third rotating disc is arranged on one side, in contact with the second sealing plate, of the sealing barrel and matched with the second sealing plate in a magnetic attraction mode, and the sealing barrel is hollow and provided with a motor used for controlling the third rotating disc to rotate.

Has the beneficial effects of

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

this PCB board test fixture is when using, the accessible the rotation of adjustable shelf makes the PCB board realize fast switch-over between hot chamber and cold chamber to reach the test purpose of temperature shock, make test data more accurate, after switching, the accessible butt cooperation between movable heat insulating board and the fixed heat insulating board in time cuts off hot chamber and cold chamber, in order to prevent hot chamber and cold chamber influence temperature shock test's effect because excessive heat exchange, and whole in-process need not artifical the intervention, has saved the artifical process that shifts of PCB board between two thermostats, has both simplified the test step, can effectively improve the security in the test process again.

Drawings

Fig. 1 is a first schematic structural diagram of a PCB testing tool according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a PCB testing tool according to an embodiment of the present invention;

1. a test box; 1a, a thermal cavity; 1b, a cold chamber; 21. a movable heat insulation plate; 22. fixing the heat insulation plate; 31. a first sealing plate; 32. a second sealing plate; 4. a first rotating disk; 5. a second rotating disk; 6. a sealing cylinder; 7. an elastic member; 8. a convex edge; 9. a dust-proof sleeve; 10. a third rotating disk; 11. an electric motor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to," "disposed on," "secured to," or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is considered to be "fixedly connected" to another element, the two elements may be fixed by way of detachable connection, or may be fixed by way of non-detachable connection, such as sleeving, clamping, integrally-formed fixing, welding, etc., which can be implemented in the prior art, and is not cumbersome. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

References to "first" and "second" in this disclosure do not denote any particular order or quantity, but rather are used to distinguish one element from another.

With reference to fig. 1 and 2, the PCB testing tool of the embodiment comprises a testing box 1, wherein a hot chamber 1a and a cold chamber 1b are arranged in the testing box 1, the hot chamber 1a and the cold chamber 1b are horizontally arranged at left and right intervals in the testing box 1, a thermal insulation board is arranged between the hot chamber 1a and the cold chamber 1b, the thermal insulation board is vertically arranged to isolate the hot chamber 1a from the cold chamber 1b so as to prevent heat exchange between the hot chamber 1a and the cold chamber 1b, the PCB testing tool further comprises a movable frame rotatably mounted in the testing box 1, the thermal insulation board comprises a movable thermal insulation board 1 and fixed thermal insulation boards 2 arranged at two sides of the movable thermal insulation board 1, the movable thermal insulation board 1 is in butt fit with the fixed thermal insulation boards 2, when the movable heat insulation board 1 is abutted to the fixed heat insulation board 2, a sealing structure is formed between the movable heat insulation board 1 and the fixed heat insulation board 2, the movable heat insulation board 1 is fixedly connected to the movable frame, the movable frame is arranged in the test box 1 in a rotating mode, the movable heat insulation board 1 rotates synchronously along with the movable frame, the fixed heat insulation board 2 is fixedly connected to the test box 1, the fixed isolation board 22 is kept fixed when the movable frame rotates, two sides of the movable heat insulation board 1 are fixedly positioned for a PCB, and the two PCB boards are fixedly installed on the movable frame while the two sides of the movable heat insulation board 1 are used for temperature impact tests.

This PCB board test fixture is when using, the accessible the rotation of adjustable shelf makes the PCB board realize fast switch-over between hot chamber 1a and cold chamber 1b to reach the experimental purpose of temperature shock, after switching, the accessible butt cooperation between movable heat insulating board 1 and the fixed heat insulating board 2 in time cuts off hot chamber 1a and cold chamber 1b, in order to prevent hot chamber 1a and cold chamber 1b influence the effect of temperature shock test because of excessive heat exchange, and the whole in-process need not artifical the intervention, has saved the artifical process that shifts of PCB board between two thermostats, has simplified the test step promptly, can effectively improve the security in the test process again.

As an alternative of the present invention, in order to improve the sealing property between the movable heat insulation board 1 and the fixed heat insulation board 2, the movable heat insulation board 1 and the fixed heat insulation board 2 are in magnetic attraction fit, and through the magnetic attraction fit, the influence on the partition effect between the hot cavity 1a and the cold cavity 1b caused by the dislocation between the movable heat insulation board 1 and the fixed heat insulation board 2 can also be effectively avoided.

As an alternative of the invention, the two surfaces of the movable heat insulation board 1 on the movable frame are respectively provided with a fixed structure, the fixed structures comprise a first rotating disk 4 and a second rotating disk 5 which are arranged at intervals, the first rotating disk 4 and the second rotating disk 5 are respectively arranged at the upper end and the lower end of the movable frame, the first rotating disk 4 and the second rotating disk 5 are respectively provided with a PCB board clamping structure for clamping the upper end and the lower end of the PCB board for fixing, and during testing, the surface of the PCB board can be heated or cooled more uniformly by controlling the rotation of the PCB board, so that the testing result is more accurate.

As an alternative of the present invention, there are two structures for controlling the rotation of the PCB, one is to control the rotation of the first rotating disk 4 and the second rotating disk 5 by a motor, and the other is to arrange a fan facing the fixed structure in the hot chamber 1a and the cold chamber 1b to blow the PCB to rotate by the airflow generated by the fan, and there is also an advantage that the heat exchange effect between the PCB and the air can be improved by the fan driving, thereby further improving the accuracy of the test result.

As an alternative of the present invention, the movable frame is detachably installed in the test box 1, so that the installation and removal of the PCB board can be completed outside the test box 1 without manually inserting a hand into the test box 1 for the above operation, which has a great risk, especially when the test is just finished, the temperature in the test box 1 is polarized.

As an alternative of the present invention, there are various detachable manners of the movable frame, in this embodiment, the movable frame is installed in the testing box 1 in a drawing manner, a first movable opening for drawing the movable frame is provided on the upper end surface of the testing box 1, the movable frame includes a first sealing plate 31 for blocking the first movable opening, the first sealing plate 31 is provided with a handle for facilitating manual detachment, the movable heat insulation board 1 is fixedly connected to the first sealing plate 31, when the movable frame is detached, the movable heat insulation board 12 is taken out from the testing box 1 together, the testing box 1 is provided with a second movable opening on the other side opposite to the first movable opening, the second movable opening is provided on the lower end surface of the testing box 1, the movable frame further includes a second sealing plate 32 for blocking the second movable opening, the first sealing plate 31 and the second sealing plate 32 are respectively fixedly connected to the upper end and the lower end of the movable heat insulation plate 1, the test box 1 is further provided with a sealing cylinder 6 which can enter the test box 1 through the second movable opening, and an elastic member 7 which is used for pushing the sealing cylinder 6 to move into the test box 1 and is in butt fit with the fixed heat insulation plate 2, when the sealing cylinder 6 moves into the test box 1, the sealing cylinder 6 is in butt fit with the fixed heat insulation plate 2 to achieve the effect of separating the hot cavity 1a and the cold cavity 1b, the sealing cylinder 6 is made of heat insulation materials, the elastic member 7 is a spring and cannot overcome the gravity of the movable frame to push the sealing cylinder 6 into the test box 1, the sealing cylinder 6 is arranged below the test box 1, one end of the sealing cylinder extends into the test box 1 through the second movable opening, when the second sealing plate 32 blocks the second movable opening, the upper end of the sealing cylinder 6 is flush with the lower end face of the test box 1 or a small part of the sealing cylinder extends into the second movable opening, one end of the sealing cylinder 6 is in butt fit with the second sealing plate 32 to achieve a sealing effect, and therefore the hot cavity 1a and the cold cavity 1b are always in a blocked state in the process that the movable frame is pulled out outwards or put in inwards.

As an alternative of the present invention, a convex edge 8 is disposed at one end of the sealing cylinder 6 away from the second movable opening, an outer diameter of the convex edge 8 is greater than a diameter of the second movable opening, and when the convex edge 8 abuts against a lower end surface of the test box 1, the sealing cylinder 6 cannot move into the test box 1 continuously, so as to achieve a purpose of controlling a moving distance of the sealing cylinder 6, and prevent the second movable opening from being sealed by the sealing cylinder 6 due to an excessively large moving distance of the sealing cylinder 6.

As an alternative of the present invention, a dust-proof sleeve 9 is fixedly connected to the exterior of the test box 1, the dust-proof sleeve 9 is coaxially arranged with the sealing cylinder 6, the dust-proof sleeve 9 is covered outside the sealing cylinder 6, the inner diameter of the dust-proof sleeve 9 is consistent with the outer diameter of the flange 8, and the dust-proof sleeve 9 is mainly arranged to prevent dust in air from adhering to the surface of the sealing cylinder 6 to indirectly pollute the hot chamber 1a and the cold chamber 1b.

As an alternative of the present invention, a third rotary disk 10 is provided on the side of the sealing cylinder 6 contacting the second sealing plate 32, the third rotary disk 10 is rotatable with respect to the sealing cylinder 6, the third rotary disk 10 is magnetically coupled to the second sealing plate 32, a motor 11 for controlling the rotation of the third rotary disk 10 is installed in the sealing cylinder 6 in a hollow state, the rotation of the movable frame is indirectly controlled by the second sealing plate 32 when the motor 11 controls the rotation of the third rotary disk 10, and the movable frame is pulled by force to separate the second sealing plate 32 from the third rotary disk 10 when the movable frame is attached and detached.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. The utility model provides a PCB board test fixture which characterized in that: the test box comprises a test box body, wherein a hot cavity and a cold cavity are arranged in the test box body, a heat insulation plate is arranged between the hot cavity and the cold cavity, the test box body further comprises a movable frame which is rotatably installed in the test box body, the heat insulation plate comprises a movable heat insulation plate and fixed heat insulation plates which are arranged on two sides of the movable heat insulation plate, the movable heat insulation plate is in butt fit with the fixed heat insulation plates, the movable heat insulation plate is fixedly connected onto the movable frame, the fixed heat insulation plates are fixedly connected onto the test box body, and the movable frame is located on two sides of the movable heat insulation plate and is fixedly positioned for a PCB.

2. The PCB testing tool of claim 1, wherein: the movable heat insulation plate is matched with the fixed heat insulation plate in a magnetic attraction manner.

3. The PCB testing tool of claim 1, wherein: the movable frame is located two sides of the movable heat insulation plate are both provided with fixing structures, each fixing structure comprises a first rotating disk and a second rotating disk which are arranged at intervals, and PCB clamping structures are arranged on the first rotating disks and the second rotating disks.

4. The PCB testing tool of claim 3, wherein: and fans used for facing the fixed structure are arranged in the hot cavity and the cold cavity.

5. The PCB testing tool according to any one of claims 1-4, wherein: the movable frame is detachably arranged in the test box.

6. The PCB testing tool of claim 5, wherein: the movable frame is arranged in the test box in a drawing mode, a first movable opening for drawing the movable frame is formed in the test box, the movable frame comprises a first sealing plate for plugging the first movable opening, and the movable heat insulation plate is fixedly connected to the first sealing plate.

7. The PCB testing tool of claim 6, wherein: the test box is characterized in that a second movable opening is formed in the other side, opposite to the first movable opening, of the test box, the movable frame further comprises a second sealing plate used for blocking the second movable opening, the second sealing plate is fixedly connected to the movable heat insulation plate, the test box is further provided with an accessible, the second movable opening enters a sealing barrel in the test box, and the sealing barrel is used for pushing the sealing barrel to move to an elastic part matched with the fixed heat insulation plate in the test box in an abutting mode, and one end of the sealing barrel is matched with the second sealing plate in an abutting mode.

8. The PCB testing tool of claim 7, wherein: and a convex edge is arranged at one end of the sealing cylinder, which is far away from the second movable opening, and the outer diameter of the convex edge is larger than the caliber of the second movable opening.

9. The PCB testing tool of claim 8, wherein: the dustproof sleeve is fixedly connected to the outside of the test box and covered outside the sealing barrel, and the inner diameter of the dustproof sleeve is consistent with the outer diameter of the convex edge.

10. The PCB testing tool of claim 7, wherein: the last one side with the second closing plate contact of sealed cylinder is equipped with the third rotary disk, the cooperation is inhaled with second closing plate magnetism to the third rotary disk, the inside cavity of sealed cylinder just installs and is used for control the rotatory motor of third rotary disk.