Weather resistance testing device for circuit board

Abstract

The utility model relates to the technical field of circuit board testing devices, in particular to a circuit board weather resistance testing device which comprises a testing bin, a drawer type sample fixing platform is arranged in the testing bin, the drawer type sample fixing platform comprises a sample plate, a bearing plate, a locking assembly, a sealing assembly and a sample plate loading circuit board, and the bearing plate fixes the sample plate. The locking assembly is matched with the sealing assembly to finish the sealing action while limiting the bearing plate, a spring telescopic rod of the sealing assembly is provided with a locking state reminding assembly, a circuit is triggered to be connected in the action process of the locking assembly, and a voice broadcaster gives out a prompt; the cross section of the end of the second sliding block is triangular, an insulating layer is arranged on the inclined face close to the second spring, in the process of releasing limiting of the bearing plate, when the first fixed contact makes contact with the second sliding block again, the contact face is the inclined face of the insulating layer of the second sliding block, and therefore false alarm caused by circuit connection of the voice broadcast device is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circuit board testing device technical field, concretely is a kind of circuit board weather resistance testing device. BACKGROUND

[0002] Circuit board weather resistance testing device is a kind of equipment specially used to evaluate the performance and reliability of printed circuit board under simulated environmental conditions. This test is essential to ensure that the circuit board can work normally under various climatic and environmental factors, which mainly includes test bin (provides good sealing and controllable test environment for testing), control system (sets and maintains the environmental conditions required for testing), sample fixing device (places and fixes the circuit board to be tested), data recording equipment, etc.

[0003] The existing circuit board weather resistance testing device is mostly through opening the door of test bin when loading or unloading sample, and the operator operates in the test bin with both hands, which not only increases the safety risk, but also limits the loading and unloading speed of sample due to the limited space in the test bin, and reduces the operation efficiency. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of circuit board weather resistance testing device with drawer type sample fixing platform to solve the problems raised in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A kind of circuit board weather resistance testing device, including test bin, drawer type sample fixing platform is equipped in the test bin, the drawer type sample fixing platform enters and exits through the rectangular hole opened on the test bin, the drawer type sample fixing platform includes:

[0007] Sample plate, bottom surface is equipped with magnetic metal plate, and the top surface is fixed circuit board through clamp;

[0008] Bearing plate, slidingly connected with the test bin, and the top surface is equipped with electromagnet;

[0009] Locking assembly, including lock hole assembly and lock head assembly, the lock hole assembly includes lock hole and first sliding groove oppositely opened on the side wall of the lock hole, the first sliding groove is equipped with first slider and first spring, the free end of the first slider is equipped with inclined surface and is directed to the opening direction of the lock hole, the lock head assembly includes lock rod, one end of the lock rod is fixedly connected with the inner wall of the test bin, the other end is fixedly connected with second cone after passing through first cone, the lock rod is axially slidably connected with the first cone, the first cone and the inner wall of the test bin are equipped with tension spring, the lower bottom of the first cone and the second cone is opposite, and the diameter of the lower bottom of the first cone is greater than that of the second cone;

[0010] The utility model provides a sealing assembly, including the sealing board and the face plate who set up oppositely and are connected through elastic element, at least be equipped with two sets of elastic element still includes connecting rod, one end fixed connection face plate of connecting rod, the other end passes through sealing board and is fixedly connected with the bearing plate, and the connecting rod is connected with the sliding sealing of sealing board.

[0011] Preferably, the elastic element is a spring telescopic rod, and the spring telescopic rod is provided with a locking state reminding assembly, which includes a telescopic elastic contact and first and second fixed contacts, a voice broadcaster, the elastic contact is arranged on a fixed rod of the spring telescopic rod, the first and second fixed contacts are fixedly connected to a movable rod of the spring telescopic rod, the first and second fixed contacts are linearly arranged and in the same plane as the elastic contact, and the elastic contact, the first and second fixed contacts are respectively electrically connected to a circuit of the voice broadcaster.

[0012] Preferably, the elastic contact includes a second sliding block, the second sliding block is slidably connected to a second sliding groove formed in the fixed rod, a third spring is arranged in the second sliding groove, the second sliding block, the first fixed contact and the second fixed contact have a triangular cross section at the end portions thereof, and an insulating layer is arranged on a slope of the second sliding block, which faces a direction of retraction of the spring telescopic rod.

[0013] Preferably, a ring-shaped anti-skid strip is arranged on a side surface of the first cone, a limiting block is arranged on the lock rod, and the distance from the limiting block to the test chamber is equal to the free length of the tension spring.

[0014] Preferably, a rectangular groove is arranged on the test chamber, the rectangular hole is arranged in the rectangular groove, and the face plate is completely embedded in the rectangular groove in the closed state.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. The limiting assembly is actuated and limits the bearing plate by pushing the face plate, the spring telescopic rod is compressed and acts on the sealing plate in the process of actuation of the locking assembly, and the sealing is completed synchronously when the limiting action is completed.

[0017] 2. When the locking assembly limits the bearing plate and the sealing assembly completes the sealing, the first fixed contact of the locking state reminding assembly contacts the elastic contact and connects the circuit of the voice broadcaster, and a voice reminder is issued; when the locking assembly releases the limiting of the limiting plate, the second fixed contact contacts the elastic contact and connects the circuit of the voice broadcaster, and a voice reminder is issued.

[0018] 3、Second slider end cross section is triangular and sets up insulating layer on the slope of spring telescopic rod retraction direction, in the process of removing the limit to the bearing plate, when the first fixed contact contacts the second slider again, the contact surface is the insulating layer slope of the second slider, thereby avoiding the false report of the voice broadcast circuit connection. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The overall structure schematic view of the drawer type sample fixing platform;

[0020] Figure 2 The schematic view of the drawer type sample fixing platform when the drawer type sample fixing platform is drawn out of the test chamber;

[0021] Figure 3 The overall schematic view of the drawer type sample fixing platform;

[0022] Figure 4 The structure schematic view of the planing and cutting bearing plate rear locking assembly;

[0023] Figure 5 The sectional view of the spring telescopic rod;

[0024] Figure 6 The utility model Figure 5 The enlarged view of the A place (namely the structure schematic view of the locking state reminding assembly part).

[0025] In the drawing: 1, test chamber;101, rectangular groove;2, sample plate;3, bearing plate;4, locking assembly;401, lock hole;402, first sliding groove;403, first sliding block;404, first spring;405, lock rod;406, first cone;407, second cone;408, tension spring;409, annular anti-skid bar;410, limiting block;5, sealing assembly;501, spring telescopic rod;502, movable rod;503, fixed rod;504, second spring;505, sealing plate;506, panel;507, connecting rod;6, locking state reminding assembly;601, second sliding block;602, second sliding groove;603, third spring;604, insulating layer;605, first fixed contact;606, second fixed contact;7, sliding rail sliding block assembly. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] The utility model provides a technical scheme:

[0028] Referring to Figure 1 、 Figure 2 A circuit board weather resistance testing device, including test bin 1, being equipped with the drawer type sample fixed platform in test bin 1, the drawer type sample fixed platform goes in and out through the rectangular hole of test bin 1, and the drawer type sample fixed platform includes:

[0029] Sample board 2, bottom surface is equipped with magnetic metal plate such as iron plate, steel plate, silicon steel plate, and the top surface is fixed circuit board through the fixture, and the fixture can select the fixture commonly used in the field such as buckle fixture, parallel fixture or vacuum chuck, etc.

[0030] Bearing plate 3, can adopt the sliding rail sliding block assembly 7 in prior art to realize the sliding connection with test bin 1, and the top surface is equipped with electromagnet, and sample board 2 is fixed through the magnetic force of electromagnet;

[0031] Referring to Figure 3 、 Figure 4 Locking assembly 4, including lock hole 401 assembly and lock head assembly, lock hole 401 assembly includes lock hole 401 in the end surface of bearing plate 3 and first sliding groove 402 oppositely arranged on the side wall of lock hole 401, first sliding block 403 is slidably arranged in first sliding groove 402, first spring 404 is arranged between the free end of first sliding block 403 and the bottom surface in first sliding groove 402, the free end of first sliding block 403 is provided with inclined surface and is directed to the opening direction of lock hole 401, and lock head assembly includes lock rod 405, one end of lock rod 405 is fixedly connected with the inner wall of test bin 1, the other end is fixedly connected with second taper 407 after passing through first taper 406, lock rod 405 is axially slidably connected with first taper 406, and pull spring 408 is arranged between first taper 406 and the inner wall of test bin 1, pull spring 408 is sleeved on lock rod 405, and the lower bottom of first taper 406 and second taper 407 is opposite, and the diameter of the lower bottom of first taper 406 is greater than that of second taper 407 (the lower bottom described in the application is the end surface with larger diameter on the taper) ;

[0032] Referring to Figure 2 、 Figure 3 Sealing assembly 5, including sealing plate 505 and panel 506 oppositely arranged and connected through elastic element, the elastic element is provided with at least two groups, further including connecting rod 507, one end of connecting rod 507 is fixedly connected with panel 506, the other end is fixedly connected with bearing plate 3 after passing through sealing plate 505, and connecting rod 507 and sealing plate 505 are slidably and sealingly connected, and the slidably and sealingly connected between connecting rod 507 and sealing plate 505 can be realized by the guide bushing and gasket commonly used in prior art.

[0033] Referring to Fig Figure 5 、 Figure 6The spring telescopic rod 501 comprises a movable rod 502 and a fixed rod 503, the movable rod 502 is slidingly connected to the inner cavity of the fixed rod 503, and a second spring 504 is arranged between the bottom surface of the inner cavity of the movable rod 502 and the fixed rod 503.

[0034] The spring telescopic rod 501 is provided with a locking state reminding assembly 6, which comprises a telescopic elastic contact, a first fixed contact 605, a second fixed contact 606 and a voice broadcaster, the elastic contact is arranged on the fixed rod 503, the first fixed contact 605 and the second fixed contact 606 are fixedly connected to the side surface of the movable rod 502, the first fixed contact 605 and the second fixed contact 606 are linearly arranged and located in the same plane as the elastic contact, the plane passes through the central axis of the spring telescopic rod 501, and the elastic contact, the first fixed contact 605 and the second fixed contact 606 are respectively electrically connected to the circuit of the voice broadcaster.

[0035] The elastic contact comprises a second sliding block 601, the second sliding block 601 is slidingly connected to a second sliding groove 602 formed in the fixed rod 503, a third spring 603 is arranged in the second sliding groove 602, the end portions of the second sliding block 601, the first fixed contact 605 and the second fixed contact 606 are triangular in cross section, an insulating layer 604 is arranged on the inclined surface of the second sliding block 601 close to the second spring 504, and the insulating layer 604 can be made of polytetrafluoroethylene, polyurethane or epoxy resin.

[0036] The circuit connection of the locking state reminding device can be designed according to existing knowledge, for example, a digital signal is used, for example, a microcontroller with a model of Arduino Uno, PIC or ARM Cortex-M is selected, the elastic contact is connected to the positive electrode of a power supply, the first fixed contact 605 and the second fixed contact 606 are respectively connected to different input pins of the microcontroller, when the contacts are connected, the corresponding pins are pulled up or pulled down, the microcontroller detects the level change and sends an instruction to the voice reminding device through an output pin to play different audio.

[0037] Referring to Figure 4 An annular anti-skid strip 409 is arranged on the side surface of the first cone 406, which aims to increase the friction between the first sliding block 403 and the side surface of the first cone 406, so as to ensure that the friction between the first sliding block 403 and the first cone 406 is sufficient to overcome the elastic force of the tension spring 408 to drive the first cone 406 to abut against the second cone 407 during the process of releasing the limiting of the bearing plate 3 by the locking assembly 4, and the unlocking is completed.

[0038] The locking rod 405 is provided with a limiting block 410, and the distance from the limiting block 410 to the test bin 1 is equal to the free length of the tension spring 408.

[0039] Referring to Figure 1 , Figure 2The rectangular slot 101 is arranged on the test chamber 1, and the rectangular hole is arranged in the rectangular slot 101. After the drawer-type sample fixing platform is closed and sealed with the test chamber 1, the panel 506 of the sealing assembly 5 is completely arranged in the rectangular slot 101.

[0040] The rigidity coefficient of the first spring 404 in the application is more than three times of the rigidity coefficient of the tension spring 408.

[0041] The closing process: after the sample plate 2 is loaded with the circuit board, the sample plate 2 is placed on the bearing plate 3 and the electromagnet is controlled to be powered on, the fixing of the sample plate 2 is completed, the panel 506 is pushed, the bearing plate 3 slides to the inside of the test chamber 1, and in the last stage of closing, the sealing plate 505 abuts against the edge of the rectangular hole first, and then the bearing plate 3 continues to slide, the locking head assembly is inserted into the locking hole 401 assembly, the inclined surface of the first sliding block 403 contacts and slides along the side surface of the second taper 407, until the first sliding block 403 slides over the lower bottom edge of the second taper 407, the first sliding block 403 is clamped to the lower bottom of the second taper 407, and the bearing plate 3 is limited. During the action of the locking assembly 4, the panel 506 continuously compresses the spring telescopic rod 501, the spring telescopic rod 501 is retracted and acts on the sealing plate 505, the locking assembly 4 acts and limits the bearing plate 3, the spring telescopic rod 501 is elastically deformed to a set deformation amount and provides sufficient acting force on the sealing plate 505, the locking assembly 4 and the sealing assembly 5 are cooperated to complete the locking and sealing of the drawer-type sample fixing platform. On the other hand, during the retraction of the spring telescopic rod 501, the first fixed contact 605 gradually approaches the elastic contact, until the first sliding block 403 is clamped to the lower bottom of the second taper 407 to complete the limiting action, the first fixed contact 605 contacts the inclined surface of the non-insulating layer 604 of the telescopic contact and communicates with the voice broadcaster circuit, the voice broadcaster emits a voice prompt, and thus the closing and sealing of the drawer-type sample fixing platform are completed.

[0042] Opening process: first continue to push the panel 506 inward, the first slider 403 is separated from the lower bottom of the second cone 407, the carrier plate 3 continues to move, the inclined surface of the first slider 403 contacts and acts on the lower bottom edge of the first cone 406, pushes the first cone 406 to compress the tension spring 408 and close to the inner wall of the test chamber 1, until the first cone 406 abuts against the limiting block 410, the first cone 406 stops sliding, the first slider 403 retracts and slides through the lower bottom edge of the first cone 406, the first slider 403 slides along the side edge of the first cone 406 until close to the limiting block 410, at this time, the second fixed contact 606 contacts and communicates with the inclined surface of the non-insulating layer 604 of the elastic contact, and the voice broadcast circuit is issued, the voice prompt is issued, the panel 506 is stopped, the spring extension rod 501 is elastically deformed, the carrier plate 3 is reversely moved through the panel 506 and the connecting rod 507, the first slider 403 is reversely moved, and the first cone 406 is close to the second cone 407, when the first cone 406 abuts against the second cone 407, the first slider 403 slides along the side edge of the first cone 406 and finally passes through the lower bottom edge of the second cone 407, the first cone 406 is reset under the action of the tension spring 408, at this time, the limiting of the carrier plate 3 is released, the panel 506 is continuously pulled, until the sample plate 2 is conveniently disassembled, and the opening process of the drawer type sample fixing platform is completed. It should be noted that during the process of releasing the limiting of the carrier plate 3 by the locking assembly 4, when the first cone 406 abuts against the second cone 407, the first fixed contact 605 will contact the elastic contact again, at this time, the second fixed contact 606 contacts the inclined surface of the insulating layer 604 of the elastic contact, and the circuit is not connected, so as to avoid the false report of the voice broadcast.

[0043] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A weather resistance test device for a circuit board, characterized by: The utility model relates to a test chamber, which comprises a drawer type sample fixing platform, a rectangular hole on the test chamber, a sample plate, a bearing plate, a locking assembly, a sealing assembly and a spring telescopic rod. The sample plate is fixed on the drawer type sample fixing platform through the rectangular hole on the test chamber. The bearing plate is connected to the test chamber through sliding. The locking assembly comprises a lock hole assembly and a lock head assembly. The lock hole assembly comprises a lock hole on the end face of the bearing plate and a first sliding groove opposite to the side wall of the lock hole.

2. The weather resistance testing device for a circuit board according to claim 1, characterized by: The first sliding groove is provided with a first sliding block and a first spring.

3. The weather resistance testing device for a circuit board according to claim 2, characterized in that: The free end of the first sliding block is provided with an inclined surface and faces the opening direction of the lock hole.

4. The weather resistance testing device for a circuit board according to claim 1, characterized in that: The lock head assembly comprises a lock rod.

5. The weather resistance testing device for a circuit board according to claim 1, characterized by: One end of the lock rod is fixedly connected to the inner wall of the test chamber. The other end of the lock rod is fixedly connected to a second cone after penetrating a first cone. The lock rod is axially connected to the first cone. A tension spring is arranged between the first cone and the inner wall of the test chamber. The first cone and the second cone are opposite to each other. The diameter of the lower bottom of the first cone is greater than that of the second cone. The sealing assembly comprises a sealing plate and a face plate which are opposite to each other and connected by an elastic element. The elastic element is provided with at least two groups. The sealing assembly further comprises a connecting rod. One end of the connecting rod is fixedly connected to the face plate. The other end of the connecting rod is fixedly connected to the bearing plate after penetrating the sealing plate. The connecting rod is connected to the sealing plate through sliding. The elastic element is a spring telescopic rod. The spring telescopic rod is provided with a locking state reminding assembly. The locking state reminding assembly comprises an elastic contact, a first fixed contact, a second fixed contact and a voice broadcaster. The elastic contact is arranged on the fixed rod of the spring telescopic rod. The first fixed contact and the second fixed contact are fixedly connected to the movable rod of the spring telescopic rod. The first fixed contact and the second fixed contact are linearly arranged and in the same plane as the elastic contact. The elastic contact, the first fixed contact and the second fixed contact are respectively connected to the circuit of the voice broadcaster. The elastic contact comprises a second sliding block. The second sliding block is connected to a second sliding groove in the fixed rod through sliding. The second sliding groove is provided with a third spring. The end of the second sliding block, the first fixed contact and the second fixed contact is triangular in cross section. An insulating layer is arranged on the inclined surface of the second sliding block which faces the retracting direction of the spring telescopic rod. An annular anti-skid strip is arranged on the side surface of the first cone. A limiting block is arranged on the lock rod. The distance from the limiting block to the test chamber is equal to the free length of the tension spring. A rectangular groove is arranged on the test chamber. The rectangular hole is located in the rectangular groove. The face plate is completely embedded in the rectangular groove in the closed state.

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