Device for screening environmental stress
By designing an environmental stress screening device with a multi-layer mounting frame structure, the existing device space is solved and the problems of strict test conditions are achieved, and efficient screening of multiple components and components is achieved to meet the test strength requirements.
Patent Information
- Application Number
- CN202420926100.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing environmental stress screening device has a small space, a long test preparation period and strict conditions, making it difficult to accommodate multiple components, printed boards and module components for effective screening at the same time.
A device for environmental stress screening is designed, including the bottom, middle and top mounting frames. Through the frame fixing holes, guide rails and threaded holes, multiple installation and fixation of components, printed boards and components are realized to meet the test strength requirements. .
It realizes effective screening of a large number of electronic components, printed circuit boards and module components when meeting the test strength requirements, and simplifies the installation and operation process of the test equipment.
Smart Images
Figure CN222241414U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of test devices, in particular to a device for environmental stress screening. Background Art
[0002] The main purpose of environmental stress screening is to discover and eliminate the early aging of products, so that they enter the random failure stage before they are used and enter into use with an inherent reliability level.
[0003] Electronic components, printed circuit boards, and module assemblies must undergo environmental stress screening before assembly to detect and eliminate process defects in defective parts and components and prevent early failures.
[0004] Environmental tests include temperature cycling, random vibration, high and low temperature, thermal shock and other test items. The test equipment for these tests has a small space, a long test preparation cycle and strict test conditions.
[0005] Therefore, it is necessary to design an environmental stress screening device that can accommodate as many components, printed circuit boards, and module assemblies as possible while meeting the test strength requirements. Utility Model Content
[0006] The purpose of the present invention is to provide an environmental stress screening device capable of accommodating a relatively large number of components, printed circuit boards and subassemblies in response to the above-mentioned needs.
[0007] The technical solution adopted by the utility model to solve its technical problems is: an environmental stress screening device, which consists of a bottom mounting frame for mounting large ring screen components, a middle mounting frame for mounting small ring screen components and a top mounting frame for mounting a ring screen printed circuit board; the bottom mounting frame is sequentially provided with frame fixing holes, modular holes for cable routing and fixing, bottom component mounting holes for fixing the controller, and an "J"-shaped clamp and an "L"-shaped fixing plate; the middle mounting frame is provided with a mounting plate, and the mounting plate is sequentially provided with guide rail mounting holes, threaded holes and tie holes, and the guide rail mounting holes are fixedly installed with a "["-shaped upper guide rail and a lower guide rail by countersunk screws; the top mounting frame is sequentially provided with hanging rings and top component mounting holes, and the hanging rings are provided at the four corners of the top mounting frame.
[0008] The frame fixing holes of the environmental stress screening device are evenly distributed around the bottom mounting frame and are used for fixed connection with the vibration table and other environmental screening equipment.
[0009] The device for environmental stress screening has a bottom component mounting hole of a thread hole structure, which is located in the middle of the bottom mounting frame and is used to fix large components requiring environmental screening.
[0010] The device for environmental stress screening has an upper guide rail and a lower guide rail with a long side on the left and a short side on the right. The bottom edges of the upper guide rail and the lower guide rail are provided with tapered holes for connecting the guide rail and the frame. After installation and fixation, the side edges of the upper guide rail and the lower guide rail are on the same vertical plane, and when the lower guide rail and the upper guide rail are installed on the frame, the grooves of the two guide rails are on the same plane.
[0011] The beneficial effects of the present invention are as follows: when in use, the frame is fixed to the environmental stress screening device through the frame fixing holes 11 of the bottom mounting frame 1, heavier parts are installed through the bottom component mounting holes, components, printed circuit boards and components are installed on the middle mounting frame through the mounting plate, the mounting plate slides into the slide grooves of the lower guide rail and the upper guide rail and is fixed to the lower guide rail and the upper guide rail through screws, and the top mounting frame completes the installation of the ring screen parts through the threaded holes, thereby realizing the function of the device.
[0012] The utility model can accommodate more electronic components, printed circuit boards and module components while meeting the test strength requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;
[0014] Figure 2 It is a structural diagram of the bottom mounting frame;
[0015] Figure 3 It is a structural diagram of the middle installation frame;
[0016] Figure 4 It is a structural diagram of the upper and lower guide rails;
[0017] Figure 5 It is a structural diagram of the top mounting frame.
[0018] The names of the marks in the figure are: 1—bottom mounting frame, 11—frame fixing hole, 12—bottom component mounting hole, 2—middle mounting frame, 22—lower guide rail, 23—upper guide rail, 24—mounting plate, 3—top mounting frame, 31—lifting ring, 32—top component mounting hole. DETAILED DESCRIPTION
[0019] The following is a detailed and complete description of the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. The described embodiments are only a part of the embodiments, not all of the embodiments. For those skilled in the art, the other advantages and effects of the present invention can be intuitively understood from the contents described in this specification. The details of this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.
[0020] Reference Figure 1As shown, the environmental stress screening device disclosed in the present invention includes a bottom mounting frame 1 , a middle mounting frame 2 , and a top mounting frame 3 .
[0021] Reference Figure 2 As shown, the bottom mounting frame 1 is used to install large ring screen components. The bottom mounting frame 1 is provided with frame fixing holes 11, modular holes for cable routing and fixing, bottom component mounting holes 12 for fixing the controller, and "J"-shaped clamps and "L"-shaped fixing plates. The frame fixing holes 11 evenly distributed around the bottom mounting frame 1 are used for fixed connection with the vibration table and other environmental screening equipment. Large environmental screening devices are fixed and installed through clamps or fixing plates. The controller is fixed with the "J"-shaped clamp for up, down, left, and right degrees of freedom, and the "L"-shaped fixing plate for front and back degrees of freedom. The bottom component mounting hole 12 in the middle of the bottom mounting frame 1 is a wire hole structure, which is used to fix large components that require environmental screening.
[0022] Reference Figure 3 As shown, the middle mounting frame 2 is used to install the ring screen small parts, and a mounting plate 24 is provided on the middle mounting frame 2. The mounting plate 24 is provided with guide rail mounting holes, threaded holes and tie holes in sequence. The middle components are installed on the threaded holes on both sides by screws. The tie holes are used for wiring and binding of the middle components. The guide rail mounting holes are fixed with "["-shaped upper guide rail 23 and lower guide rail 22 by countersunk screws. The mounting plate 24 with components, printed circuit boards and components installed in sequence slides into the slide grooves of the lower guide rail 22 and the upper guide rail 23 and is fixed on the lower guide rail 22 and the upper guide rail 23 by screws. The bottom edge of the lower guide rail 22 and the top edge of the upper guide rail 23 control the up and down degrees of freedom, the side edges control the left and right degrees of freedom, and the screws control the front and back degrees of freedom.
[0023] Reference Figure 4 As shown, the upper guide rail 23 and the lower guide rail 22 have the long side on the left and the short side on the right. The bottom edges of the upper guide rail 23 and the lower guide rail 22 are provided with tapered holes for connecting the guide rails and the frame. After installation and fixation, the side edges of the upper guide rail 23 and the lower guide rail 22 are on the same vertical plane, and the grooves of the two guide rails are on the same side when the lower guide rail 22 and the upper guide rail 23 are installed on the frame.
[0024] Reference Figure 5 As shown, the top mounting frame 3 is used to install the ring screen printed circuit board, etc. The top mounting frame 3 is sequentially provided with a lifting ring 31 and a top component mounting hole 32. The frame is fixed to the environmental stress screening device by screws through the frame fixing hole 11 of the bottom mounting frame 1. The lifting ring 31 is provided at the four corners of the top mounting frame 3 for device transportation and lifting. The evenly distributed threaded holes on the top mounting frame 3 complete the installation of the ring screen parts. Small components or printed circuit boards can be installed on the top mounting frame 3 directly or by using a mounting plate through screws.
[0025] During the specific implementation of the environmental stress screening device of the present invention, screws are used to fix the frame to the environmental stress screening device through the frame fixing holes 11 of the bottom mounting frame 1, heavier parts are installed through the bottom component mounting holes 12, components, printed circuit boards and components are installed on the middle mounting frame 2 through the mounting plate 24, the mounting plate 24 slides into the slide grooves of the lower guide rail 22 and the upper guide rail 23 and is fixed to the lower guide rail 22 and the upper guide rail 23 by screws, and the top mounting frame 3 completes the installation of the ring screen parts through the threaded holes, thereby realizing the function of the device.
[0026] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some embodiments of its application. A person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.
Claims
1. An environmental stress screening device, characterized in that: The invention comprises a bottom mounting frame (1) for mounting large ring screen components, a middle mounting frame (2) for mounting small ring screen components, and a top mounting frame (3) for mounting a ring screen printed circuit board; the bottom mounting frame (1) is provided with frame fixing holes (11), modular holes for cable routing, bottom component mounting holes (12) for fixing a controller, and a "J"-shaped clamp and an "L"-shaped fixing plate in sequence; the middle mounting frame (2) is provided with a mounting plate (24), the mounting plate (24) is provided with guide rail mounting holes, threaded holes and tie holes in sequence, and the guide rail mounting holes are fixedly installed with a "["-shaped upper guide rail (23) and a lower guide rail (22) by countersunk screws; the top mounting frame (3) is provided with hanging rings (31) and top component mounting holes (32) in sequence, and the hanging rings (31) are provided at the four corners of the top mounting frame (3).
2. The environmental stress screening device according to claim 1, characterized in that: The frame fixing holes (11) are evenly distributed around the bottom mounting frame (1).
3. The environmental stress screening device according to claim 1, characterized in that: The bottom component mounting hole (12) is a thread hole structure and is located in the middle of the bottom mounting frame (1).
4. The environmental stress screening device according to claim 1, 2 or 3, characterized in that: The left side of the upper guide rail (23) and the lower guide rail (22) is a long side and the right side is a short side. The bottom sides of the upper guide rail (23) and the lower guide rail (22) are provided with tapered holes. After being installed and fixed, the side sides of the upper guide rail (23) and the lower guide rail (22) are on the same vertical plane.