Terminal equipment and pressure sensing module applied to mobile equipment

Abstract

The utility model provides a terminal device and a pressure-sensitive module applied to a mobile terminal, the terminal device comprises a pressure-sensitive module, the pressure-sensitive module is located below a pressing operation part of the terminal device, and the pressing operation part is used for conducting pressing pressure to the pressure-sensitive module. The pressure sensing module comprises a stainless steel decorative ring, a first steel sheet, a flexible circuit board and sensing ink, the stainless steel decorative ring and the first steel sheet are integrally arranged, the first steel sheet is electrically connected with the flexible circuit board, and the sensing ink is electrically connected with the flexible circuit board. According to the terminal equipment and the pressure-sensitive module applied to the mobile terminal, the stainless steel decorative ring and the first steel sheet are integrally arranged, so that the technological process is shortened, the assembly process of the pressure-sensitive module is simple, and the assembly efficiency and the yield can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure sensing module technical field, especially a terminal device and pressure sensing module for mobile device. BACKGROUND

[0002] With the continuous progress of science and technology, various terminals (such as mobile phones, tablet computers, etc.) have developed rapidly. Taking mobile phones as an example, with the increasing demand, the structure, style, performance and other aspects of the update are increasingly frequent.

[0003] With the increasing popularity of terminals, especially mobile terminals, the requirements for the use experience of terminals are becoming higher and higher. The screen ratio of the terminal is one aspect that affects the visual experience of the terminal. Generally, the higher the screen ratio, the better the visual experience. Therefore, in order to improve the visual experience of users, it is necessary to improve the screen ratio of the terminal as much as possible. The pressure sensing module is installed on the side of the terminal. Due to the increasing thinness requirement of the terminal, the pressure sensing module is becoming narrower. In the structure of the pressure sensing module of the prior art, the stainless steel decorative ring and the steel sheet are separate, that is, the stainless steel decorative ring and the steel sheet are installed and combined separately. The process flow is relatively complicated during assembly, and the assembly efficiency is not high. At the same time, the complicated assembly steps can easily lead to a larger overall thickness of the pressure sensing module, thereby affecting the response degree and user experience. SUMMARY

[0004] In order to overcome the technical defects in the background art, the utility model aims to provide a terminal device and a pressure sensing module applied to a mobile terminal, which has a short process flow and simple assembly, and can improve the assembly efficiency and yield.

[0005] The utility model provides a kind of terminal device, including pressure sensing module, the pressure sensing module is below the pressing operation part of the terminal device, the pressing operation part is used to conduct to the pressure sensing module by pressing pressure, the pressure sensing module includes stainless steel decorative ring, first steel sheet, flexible circuit board and response ink, the stainless steel decorative ring is integrally arranged with first steel sheet, the first steel sheet is electrically connected with the flexible circuit board, and the response ink is electrically connected with the flexible circuit board.

[0006] In an embodiment of the utility model, the pressure sensing module further includes a second steel sheet, the second steel sheet is electrically connected with the flexible circuit board, the first steel sheet and the second steel sheet are stacked along the conduction direction of pressing force, and the first steel sheet and the second steel sheet are fixedly connected.

[0007] In an embodiment of the utility model, the pressing operation part is the area for conducting finger pressure, the pressure sensing module is located between the terminal device and the pressure sensing operation part, the pressing operation part is a protective layer, and the area for conducting finger pressure includes any position below the screen, the screen surface, the middle frame or the back plate of the terminal device.

[0008] In an embodiment of the utility model, the terminal device includes a middle frame, the middle frame includes four sequentially connected frames, the four frames enclose a placement cavity, and the pressure sensing module is arranged on the frame and located in the placement cavity.

[0009] In an embodiment of the utility model, the pressing operation part is a plastic key cap, the frame is provided with a jack, the stainless steel decorative ring has a containing groove, and the plastic key cap is inserted into the jack and extends into the containing groove.

[0010] In an embodiment of the utility model, the flexible circuit board includes a first plate segment, a connecting plate segment and a second plate segment, the first plate segment and the second plate segment are arranged in parallel, and the first plate segment and the second plate segment are connected through the connecting plate segment.

[0011] In an embodiment of the utility model, the first steel sheet and the second steel sheet are located between the first plate segment and the second plate segment, the first steel sheet is electrically connected with the first plate segment, the second steel sheet is electrically connected with the second plate segment, and the first steel sheet and the second steel sheet are connected through a second adhesive.

[0012] In an embodiment of the utility model, the terminal device further includes a Wheatstone bridge for realizing deformation output of an effective pressure signal, and an input end of the Wheatstone bridge is connected with an electric signal generated by the pressing surface.

[0013] In an embodiment of the utility model, the terminal device further includes a Wheatstone bridge for realizing deformation output of an effective pressure signal, and an input end of the Wheatstone bridge is connected with an electric signal generated by the pressing surface.

[0014] The utility model also provides a pressure sensing module applied to a mobile terminal, and the mobile terminal is the terminal device in any of the above.

[0015] In the terminal device and the pressure sensing module applied to the mobile terminal, the stainless steel decorative ring and the first steel sheet are integrally arranged, so that the process flow is shortened, the assembly process of the pressure sensing module is simple, and the assembly efficiency and yield can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an explosion structure schematic view of the pressure sensing module in an embodiment of the utility model.

[0017] Figure 2 It is the combined structure schematic view of the pressure sensing module of an embodiment of the utility model.

[0018] Figure 3 It is the structure schematic view of the installation connection of the sensing ink and the flexible circuit board of the pressure sensing module. Figure 1

[0019] Figure 4 It is the structure schematic view of the installation connection of the second steel sheet and the flexible circuit board of the pressure sensing module. Figure 1

[0020] Figure 5 It is the plan view of the plastic key cap of the pressure sensing module. Figure 1

[0021] Figure 6 It is the elevation view of the plastic key cap of the pressure sensing module. Figure 1

[0022] Figure 7 It is the plan view of the stainless steel decorative ring and the first steel sheet of the pressure sensing module. Figure 1

[0023] Figure 8 It is the elevation view of the stainless steel decorative ring and the first steel sheet of the pressure sensing module. Figure 1 DETAILED DESCRIPTION

[0024] The specific implementation of the utility model will be described in further detail below in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0025] The utility model provides a kind of terminal equipment, such as Figures 1-4 The terminal equipment of an embodiment includes pressure sensing module, pressure sensing module is located below the pressing operation part of terminal equipment, and pressing operation part is used to conduct to pressure sensing module by pressing pressure. Pressure sensing module includes stainless steel decorative ring 11, first steel sheet 12, flexible circuit board 13 and sensing ink 14, stainless steel decorative ring 11 is integrally arranged with first steel sheet 12, first steel sheet 12 is electrically connected with flexible circuit board 13, and sensing ink 14 is electrically connected with flexible circuit board 13.

[0026] In the terminal equipment of the utility model, by integrally arranging stainless steel decorative ring 11 and first steel sheet 12, process flow is shortened, the assembly process of pressure sensing module is simple, and assembly efficiency and yield can be improved.

[0027] ​​​​​​In this embodiment, the pressure sensing module further includes a second steel sheet 15 electrically connected to the flexible circuit board 13. Specifically, the first steel sheet 12 and the second steel sheet 15 are stacked and arranged along the direction of the application of the pressing force, and the first steel sheet 12 and the second steel sheet 15 are fixedly connected by the first adhesive 16.

[0028] In this embodiment, the functions of the first steel sheet 12 and the second steel sheet 15 are as follows:

[0029] 1) Improve sensitivity and accuracy: The arrangement of the first steel sheet 12 and the second steel sheet 15 can increase the sensing area, thereby improving the sensitivity and accuracy of the key. By designing the position and shape of the first steel sheet 12 and the second steel sheet 15 according to actual conditions, the user's pressing action can be captured more accurately, ensuring that each press can be accurately identified.

[0030] 2) Enhance structural stability: The first steel sheet 12 and the second steel sheet 15 support each other, enhancing the structural stability of the entire pressure sensing module. This design helps to reduce deformation or damage caused by long-term use or accidental drops, improving the durability of the product.

[0031] 3) Disperse pressure and prolong service life: The first steel sheet 12 and the second steel sheet 15 can disperse the pressure generated when the user presses, avoiding the single steel sheet from bearing the entire pressure and being easily damaged by fatigue. This pressure dispersion design helps to prolong the service life of the pressure sensing module and reduce the frequency of maintenance or replacement.

[0032] 4) Improve hand feel and responsiveness: The first steel sheet 12 and the second steel sheet 15 can be adjusted in terms of their elasticity and hardness to optimize the hand feel and responsiveness of the key. This optimization can provide users with a more comfortable and smooth user experience, enhancing the overall competitiveness of the product.

[0033] 5) Support multi-functional operation: In some designs, the first steel sheet 12 and the second steel sheet 15 can be used to detect different pressing forces or positions, respectively, thereby realizing multi-functional operation. For example, a light press on one steel sheet realizes one function, a heavy press on both steel sheets realizes another function, or simultaneous pressing of both steel sheets performs a specific combined operation.

[0034] In this embodiment, the pressing operation part is the area that conducts finger pressure, the pressure sensing module is located between the terminal device and the pressing operation part, and the pressing operation part is a protective layer. The area that conducts finger pressure includes but is not limited to any position set below the screen, on the surface of the screen, in the middle frame, or in the back plate of the terminal device. Specifically, the pressure sensing module in this embodiment is arranged in the middle frame.

[0035] Specifically, the terminal device comprises a middle frame, the middle frame comprises four bezels connected in sequence, the four bezels enclose a mounting cavity, and the pressure sensing module is arranged on the bezel and located in the mounting cavity.

[0036] Further, as Figures 5-8 The pressing operation part is a plastic key cap 17, the bezel is provided with a socket, the stainless steel decorative ring 11 has a receiving groove 111, and the plastic key cap 17 is inserted into the socket and extends into the receiving groove 111. The part of the plastic key cap 17 extending into the receiving groove 111 is fixedly connected to the groove bottom of the receiving groove 111 by the second adhesive 18, so that the plastic key cap 17 and the stainless steel decorative ring 11 are fixedly connected relative to each other. The user places a finger on the plastic key cap 17 and presses it to implement a specific operation. When the user applies pressure to the plastic key cap 17, the pressure is transmitted from the plastic key cap 17 to the first steel sheet 12 to extrude the first steel sheet 12, and the first steel sheet 12 deforms. This deformation is captured by the sensing ink 14 or other sensors on the flexible circuit board 13 and is converted into an electrical signal.

[0037] In this embodiment, the flexible circuit board 13 comprises a first board segment 131, a connecting board segment 132 and a second board segment 133, the first board segment 131 and the second board segment 133 are arranged in parallel, and the first board segment 131 and the second board segment 133 are connected by the connecting board segment 132. The first steel sheet 12 and the second steel sheet 15 are located between the first board segment 131 and the second board segment 133, the first steel sheet 12 can be electrically connected to the first board segment 131 by wires, the second steel sheet 15 can be electrically connected to the second board segment 133 by wires, the first steel sheet 12 and the second steel sheet 15 can be connected by the first adhesive 16 or fixedly connected by laser spot welding, and the second steel sheet 15 is fixedly connected to the second board segment 133 by the third adhesive 19. The sensing ink 14 is electrically connected to the second board segment 133 and located on the side of the second board segment 133 away from the second steel sheet 15.

[0038] Specifically, in this embodiment, the flexible circuit board 13 (FPC) is responsible for converting the pressure changes experienced by the steel sheets into electrical signals. When the user presses the plastic keycap, the underlying first steel sheet 12 and second steel sheet 15 will deform, and this deformation is transmitted through the sensing ink 14 on the flexible circuit board 13 and converted into an electrical signal. The flexible circuit board 13 also provides the necessary electrical connections to transmit the generated electrical signals from the steel sheets to the processing unit (such as a microprocessor) of the mobile phone. Due to the flexible nature of the flexible circuit board 13, it has advantages in space utilization and design flexibility, facilitating wiring and connection within the compact mobile phone. At the same time, the use of flexible circuit board 13 simplifies the assembly process. By pre-pressing the flexible circuit board 13 together with the first steel sheet 12, the second steel sheet 15 and other components, it can be quickly positioned and fixed during assembly, improving production efficiency and yield. The sensing ink 14 on the flexible circuit board 13 is very sensitive to weak physical changes and can accurately capture slight deformations and convert them into precise electrical signals, which is crucial for ensuring the response speed and accuracy of the keys. The flexible circuit board 13 has good flexibility and durability due to its material properties, and can resist mechanical stress and bending to some extent, thereby prolonging the service life of the product.

[0039] In this embodiment, the first adhesive 16, the second adhesive 18 and the third adhesive 19 are used to bond the stainless steel decorative ring 11, the first steel sheet 12, the flexible circuit board 13, the second steel sheet 15 and the plastic keycap 17 and other components together, to ensure that they do not fall off or shift during subsequent use.

[0040] In this embodiment, the side of the sensing ink 14 close to the second plate segment 133 is the receiving surface for accepting pressure, which is used to convert the generated pressure value into an electrical signal. The terminal device also includes a Wheatstone bridge for realizing the deformation output effective pressure signal, and the input end of the Wheatstone bridge is connected to the electrical signal generated by the receiving surface.

[0041] The utility model also provides a kind of pressure sensing module, applied to mobile terminal, and mobile terminal is the terminal device of any of the above.

[0042] The assembly process of the pressure sensing module of this embodiment is as follows:

[0043] 1, the second steel sheet 15 and the third adhesive 19 are pressed together to form an assembly;

[0044] 2, the second steel sheet 15 is pressed together with the second adhesive 18, and the second steel sheet 15 and the second adhesive 18 are folded together with the flexible circuit board 13 to form an assembly;

[0045] 3、The first steel sheet 12 and the second steel sheet 15 are combined together by the second adhesive 18 (the second adhesive 18 can not be used, and the first steel sheet 12 and the second steel sheet 15 are fixedly connected by laser spot welding);

[0046] 4、The plastic key cap 17 is attached to the stainless steel decorative ring 11 by the third adhesive 19.

[0047] In this embodiment, the pressure sensing principle of the pressure sensing module is as follows:

[0048] 1) Apply pressure: the user applies pressure to the plastic key cap 17 with a finger.

[0049] 2) Force transmission: this pressure is transmitted through the plastic key cap 17 to the first steel sheet 12 and the second steel sheet 15 below.

[0050] 3) Steel sheet deformation: due to the external force, the first steel sheet 12 and the second steel sheet 15 receive the external force and undergo slight deformation.

[0051] 4) Induction ink 14 senses deformation: the induction ink 14 on the flexible circuit board 13 senses this slight deformation, causing a change in its resistance value.

[0052] 5) Differential signal output: through the Wheatstone bridge, this resistance change is converted into a differential signal and output.

[0053] 6) Data processing: the output differential signal is further processed and amplified by the hardware circuit.

[0054] 7) Instruction recognition: the processed signal is transmitted to the microprocessor or application processor, which recognizes it as a user's pressing operation.

[0055] 8) Execute corresponding functions: finally, the processor executes corresponding functions or operations according to the preset program or algorithm.

[0056] In summary, the entire signal transmission process starts from the user applying pressure, goes through mechanical to electrical conversion, and then through circuit and processor processing and recognition, and finally realizes the user's instruction execution. In this process, the precise cooperation and rapid response of each component ensure smooth and accurate operation.

[0057] The pressure sensing module of this embodiment transmits force and responds during the user's pressing of the plastic key cap 17. The user can also slide on the plastic key cap 17, with the PAD (pad) on the flexible circuit board 13 acting as one pole of a capacitor, detecting the capacitance generated by the finger position, thereby detecting the finger position and realizing the sliding function.

[0058] In this article, unless there is a clear and specific provision and limitation, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate media, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0059] In this article, the terms "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of expressing the clarity of the technical solution and facilitating description, therefore cannot be understood as a limitation of the utility model.

[0060] In this article, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, in addition to containing the listed elements, but also containing other elements not explicitly listed.

[0061] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A terminal device comprising a pressure sensing module, the pressure sensing module being located below a pressing operation portion of the terminal device, the pressing operation portion being configured to transmit a pressing pressure to the pressure sensing module, characterized in that, The pressure sensing module comprises a stainless steel decorative ring (11), a first steel sheet (12), a flexible circuit board (13) and sensing ink (14), the stainless steel decorative ring (11) is integrally arranged with the first steel sheet (12), the first steel sheet (12) is electrically connected with the flexible circuit board (13), and the sensing ink (14) is electrically connected with the flexible circuit board (13).

2. The terminal device according to claim 1, characterized by The pressure sensing module further comprises a second steel sheet (15), the second steel sheet (15) is electrically connected with the flexible circuit board (13), the first steel sheet (12) and the second steel sheet (15) are arranged in a laminated manner along the conduction direction of the pressing force, and the first steel sheet (12) and the second steel sheet (15) are fixedly connected.

3. The terminal device according to claim 1, characterized by The pressing operation part is a region for conducting finger pressure, the pressure sensing module is located between the terminal device and the pressing operation part, the pressing operation part is a protective layer, and the region for conducting finger pressure comprises any one of positions arranged below a screen, a screen surface, a middle frame or a back plate of the terminal device.

4. The terminal device according to claim 1, characterized by The terminal device comprises a middle frame, the middle frame comprises four sequentially connected side frames, four side frames enclose a mounting cavity, and the pressure sensing module is arranged on the side frame and located in the mounting cavity.

5. The terminal device according to claim 4, characterized by The pressing operation part is a plastic key cap (17), the side frame is provided with a jack, the stainless steel decorative ring (11) has a containing groove (111), and the plastic key cap (17) is inserted into the jack and extends into the containing groove (111).

6. The terminal device according to claim 2, characterized by The flexible circuit board (13) comprises a first plate segment (131), a connecting plate segment (132) and a second plate segment (133), the first plate segment (131) and the second plate segment (133) are arranged in parallel, and the first plate segment (131) and the second plate segment (133) are connected through the connecting plate segment (132).

7. The terminal device according to claim 6, characterized by The first steel sheet (12) and the second steel sheet (15) are located between the first plate segment (131) and the second plate segment (133), the first steel sheet (12) is electrically connected with the first plate segment (131), the second steel sheet (15) is electrically connected with the second plate segment (133), and the first steel sheet (12) and the second steel sheet (15) are connected through a second adhesive (18).

8. The terminal device according to claim 7, characterized by A side of the sensing ink (14) close to the second plate segment (133) is a pressing receiving surface, and the pressing receiving surface is used for converting a generated pressure value into an electric signal.

9. The terminal device according to claim 8, characterized by The terminal device further comprises a Wheatstone bridge for realizing a deformation output effective pressure signal, and an input end of the Wheatstone bridge is connected with the electric signal generated by the pressing surface.

10. A pressure sensing module, comprising: The application is applied to a mobile terminal, and the mobile terminal is the terminal device in any one of claims 1 to 9.

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