Method for solving maximum opening and closing tension of screen in vibration process through simulation
Through the simulation method of establishing a spring unit and setting the connection relationship, the maximum opening and closing tension during the vibration of the laptop screen is calculated, which solves the problem that cannot be accurately calculated in the existing technology, and achieves design guidance and cost savings.
Patent Information
- Application Number
- CN202510451247.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2025-07-22
AI Technical Summary
The prior art cannot calculate the maximum opening and closing tension of the screen during the vibration of the laptop through theoretical methods, resulting in the need to rely on experience selection during the design process, which may lead to redundant design or insufficient resistance to tension.
By establishing a spring unit, setting the appropriate stiffness, simulating the physical hook or magnetic suction effect, and setting the connection relationship at the hinge, performing simulation calculations to extract the maximum tension.
During the design stage, the maximum opening and closing tension of the screen is accurately calculated, and the hook or magnetic suction design is guided, which eliminates test and verification, and shortens the R&D cycle and cost.
Smart Images
Figure CN120354550A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of computer reinforcement technology, and particularly to a method for solving the maximum opening and closing tension of a screen during vibration through simulation. Background Art
[0002] Some electronic devices such as laptop computers need to withstand certain vibration and shock effects in actual use scenarios. In order to prevent the screen from constantly opening and closing during vibration, it is necessary to design a certain structure to resist the pulling force of the screen opening and closing, such as designing a physical hook or using magnetic attraction, etc. There is an important unknown item here, that is, during vibration, how large is the maximum pulling force of the upper cover opening and closing. Only by knowing how large this pulling force is can further design and selection of the physical hook or magnetic attraction device be carried out. If the pulling force value is not known, only experience can be relied on for selection. However, due to different structures of each product and different vibration indexes, the pulling force of the upper cover opening and closing will be different, either resulting in redundant over-design or insufficient designed resistance to the pulling force. Currently, it is impossible to calculate through theoretical methods exactly how much resistance pulling force is required. More often, it is through continuous reverse verification and attempts through experiments after the product design is completed. Summary of the Invention
[0003] In order to solve the above technical problems, the present invention provides a method for solving the maximum opening and closing tension of a screen during vibration through simulation.
[0004] The technical solution of the present invention is as follows:
[0005] A method for solving the maximum opening and closing tension of a screen during vibration through simulation,
[0006] including:
[0007] 1) Establish spring elements. Set as many springs as there are several physical hooks or magnetic attraction points;
[0008] 2) Set the spring stiffness and select a suitable stiffness to simulate the physical hook or magnetic attraction effect;
[0009] 3) Set the connection relationship at the hinge to make the model closer to the real state;
[0010] 4) Extract the spring reaction force to ensure that the spring reaction force can be extracted.
[0011] Furthermore,
[0012] At the position of the physical hook or magnetic attraction point, establish two nodes, and create a spring element through the two nodes. In the magnetic attraction working condition, the situation where the spring length is 0 will occur; in the simulation, the length of the spring element is allowed to be 0 to meet the magnetic attraction working condition.
[0013] Set the spring stiffness to infinity and make the deformation of the spring tend to be infinitesimal, so as to simulate the effect of a physical hook or magnetic attraction.
[0014] Furthermore,
[0015] According to Hooke's law F = kΔx, it can be known that when the pulling force is constant, the smaller the deformation, the greater the stiffness;
[0016] According to the theory of vibration mechanics, when the deformation of the spring changes, the structural form of the notebook also changes, which in turn leads to changes in the structural stiffness and vibration response, and the spring pulling force also changes accordingly;
[0017] When the spring deformation becomes smaller, the change in the structural form also becomes smaller, and the change trend of the spring pulling force also becomes smaller. When the spring deformation is small enough, the structural form tends to be stable, and the spring force also tends to a stable value. In this state, the function of the spring is consistent with that of a physical hook or magnetic attraction.
[0018] The spring stiffness can be set to 10 6 .
[0019] Furthermore,
[0020] At the position where the screen is connected to the base, set it to a hinge connection method, that is, release the degree of freedom in the direction of the screen rotating around the hinge, and restrict the degrees of freedom of rotation in the remaining two directions and the degrees of freedom of translation in the three directions, so that the screen can only rotate around the hinge.
[0021] The force for the screen to start vibrating is completely provided by the spring, while the forces or torques in other directions are borne by the hinge.
[0022] Furthermore,
[0023] After calculating and solving according to the normal vibration simulation process, extract the maximum pulling force borne by the spring during vibration, and this data is the required maximum pulling force value.
[0024] The beneficial effects of the present invention are
[0025] In the design stage of the present invention, the maximum pulling force for controlling the opening and closing of the screen during vibration can be obtained, which can effectively guide the design and selection of physical hooks or magnetic attractions, eliminating the experimental verification process, and greatly shortening the R & D cycle and R & D cost. The present invention is applicable to dynamic simulations such as static simulation, random vibration, and sinusoidal vibration, and can cover most simulation types in engineering. By adding or changing several settings on the basis of conventional dynamic simulation, the marginal cost of the present invention is very low, and the marginal benefit is very high. The present invention provides a new idea that all relationships are essentially mathematical relationships. As long as the essential mathematical relationships are the same, they can be mutually transformed to solve various practical engineering problems. Brief Description of the Drawings
[0026] Figure 1 It is a schematic diagram of the overall structure;
[0027] Figure 2 It is a schematic diagram of a local spring unit;
[0028] Figure 3 It is a schematic diagram of the upper part of the local hinge connection structure;
[0029] Figure 4 It is a schematic diagram of the lower part of the local hinge connection structure. Specific implementation manners
[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0031] The present invention provides a method for obtaining the maximum tensile force borne by a screen during vibration at the design stage, which is applicable to any field that needs to obtain the constraint reaction force during vibration.
[0032] The technical solution adopted herein is as follows:
[0033] 1) Establish spring elements. The number of spring elements to be set is equal to the number of physical hooks or magnetic attraction points.
[0034] 2) Set the spring stiffness and select a suitable stiffness to simulate the physical hook or magnetic attraction effect.
[0035] 3) Set the connection relationship at the hinge to make the model closer to the actual state.
[0036] 4) Extract the spring reaction force to ensure that the spring reaction force can be extracted.
[0037] The following is a detailed description:
[0038] 1) Establish two nodes at the position of the physical hook or magnetic attraction point, and create a spring element through the two nodes. In the magnetic attraction working condition, the spring length may be 0. In the simulation, the length of the spring element is allowed to be 0, so the magnetic attraction working condition can be satisfied. The number of spring elements to be set is equal to the number of physical hooks or magnetic attraction points.
[0039] 2) Set the spring stiffness to "infinity", such as 10 6, the purpose of this setting is to make the deformation of the spring tend to be "infinitely small", so as to simulate the effect of a physical hook or magnetic attraction. According to Hooke's law \(F = \cdots\), it can be known that when the tensile force is constant, the smaller the deformation, the greater the stiffness. According to the theory of vibration mechanics, when the deformation of the spring changes, the structural form of the notebook also changes accordingly, which in turn leads to changes in the structural stiffness and vibration response, so the spring tensile force also changes accordingly. When the spring deformation becomes smaller, the change in the structural form also becomes smaller, and the change trend of the spring tensile force also becomes smaller. When the spring deformation is small enough, the structural form tends to be stable, and the spring force also tends to a stable value. In this state, the function of the spring is consistent with that of a physical hook or magnetic attraction. According to test verification, setting the spring stiffness to 10 6 is in line with engineering applications.
[0040] 3) At the hinge position where the screen is connected to the base, set the connection method as "hinge", that is, release the degree of freedom in the rotation direction of the screen around the hinge, and restrict the rotation degrees of freedom in the remaining two directions and the translation degrees of freedom in three directions, so that the screen can only rotate around the hinge. The purpose of this setting is to be more in line with the real application scenario, so that the force that causes the screen to open due to vibration is completely provided by the spring, while the forces or torques in other directions are borne by the hinge.
[0041] 4) After calculating and solving according to the normal vibration simulation process, extract the maximum tensile force borne by the spring during vibration, and this data is the required maximum tensile force value.
[0042] The above are only the preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.
Claims
1. A method for solving the maximum opening and closing pulling force of a screen during vibration through simulation, characterized in that: It includes: 1) Establish spring elements. Set as many springs as there are physical hooks or magnetic attraction points. 2) Set the spring stiffness and select an appropriate stiffness to simulate the physical hook or magnetic attraction effect. 3) Set the connection relationship at the hinge to make the model closer to the real state. 4) Extract the spring reaction force to ensure that the spring reaction force can be extracted.
2. The method according to claim 1, characterized in that: Establish two nodes at the position of the physical hook or magnetic attraction point, and create a spring element through the two nodes. In the magnetic attraction working condition, the spring length may be 0; in the simulation, the length of the spring element is allowed to be 0 to meet the magnetic attraction working condition.
3. The method according to claim 2, characterized in that: Set the spring stiffness to infinity, so that the deformation of the spring tends to be infinitely small, thereby simulating the physical hook or magnetic attraction effect.
4. The method according to claim 3, characterized in that: According to Hooke's law F = kΔx, it can be known that when the pulling force is constant, the smaller the deformation, the greater the stiffness. According to the theory of vibration mechanics, when the deformation of the spring changes, the structural form of the notebook also changes accordingly, which in turn causes changes in the structural stiffness and vibration response, and the spring pulling force also changes accordingly. When the spring deformation becomes smaller, the change in the structural form also becomes smaller, and the change trend of the spring pulling force also becomes smaller. When the spring deformation is small enough, the structural form tends to be stable, and the spring force also tends to a stable value. In this state, the function of the spring is consistent with that of the physical hook or magnetic attraction.
5. The method according to claim 4, characterized in that: Set the spring stiffness to 10 6 .
6. The method according to claim 2 or 3, characterized in that: At the position where the screen is connected to the base, set it as a hinge connection method, that is, release the degree of freedom of the screen in the rotation direction around the hinge, and restrict the remaining two rotation degrees of freedom and three translation degrees of freedom, so that the screen can only rotate around the hinge.
7. The method according to claim 6, characterized in that: The force for the screen to open due to vibration is completely provided by the spring, while the forces or torques in other directions are borne by the hinge.
8. The method according to claim 6, characterized in that: After calculating and solving according to the normal vibration simulation process, extract the maximum pulling force borne by the spring during vibration, and this data is the required maximum pulling force value.