Novel mobile phone shell structure

Abstract

The utility model relates to a novel mobile phone shell structure, which comprises a shell, a fixed frame body, an elastic body, a circuit board, touch glass and a signal transmission interface, and is characterized in that the shell is provided with a key area, the key area is provided with an opening, the fixed frame body is clamped and fixed with the opening of the shell, the elastic body is filled in the fixed frame body, and a cavity is formed in the elastic body; the circuit board is arranged in an inner cavity of the elastic body, a capacitance sensing module and a pressure sensing module are integrated on the circuit board, the touch glass is fixed to the elastic body and located at the outer end of the shell, an ITO diamond electrode array is printed on the inner side of the touch glass, and the ITO diamond electrode array is bound to the circuit board through anisotropic conductive adhesive. The signal transmission interface is arranged at one end, far away from the touch glass, of the elastic body and is electrically connected with the circuit board for transmitting capacitance and pressure signals to the mobile phone, the composite operation of pressing and touch sliding of the original key of the mobile phone is reserved, and the possibility that the original key of the mobile phone is easily damaged by external force or invaded by liquid is reduced.

Description

Technical Field

[0001] This application relates to the technical field of mobile phone distribution, and more specifically, to a novel mobile phone case structure. Background Technology

[0002] Current mainstream mobile phones (such as the iPhone 16 and high-end Android models) use a combination of capacitive touch and physical buttons (e.g., pressing to activate the camera, touching to slide and adjusting the focus). Traditional phone cases have the following problems:

[0003] 1. Blocking failure: If the phone case uses fully enclosed physical buttons, it will block the phone's capacitive touch function;

[0004] 2. Exposure risks: If holes are made in the button area, the phone's original buttons will be susceptible to damage from external forces or liquid intrusion.

[0005] 3. Interaction fragmentation: Existing phone cases cannot simultaneously support dual-mode operation of press trigger and touch swipe. Utility Model Content

[0006] To address the issues of traditional phone cases failing to cover, exposing, and disrupting interaction when dealing with the "capacitive touch + physical press" composite buttons in mainstream mobile phones, this application provides a novel phone case structure.

[0007] A new type of mobile phone case structure,

[0008] The housing has a button area with an opening.

[0009] A fixed frame is attached to the opening of the housing.

[0010] An elastomer, wherein the elastomer is filled inside the fixed frame and the elastomer has a cavity inside;

[0011] A circuit board is disposed inside the cavity of the elastomer and has a capacitance sensing module and a pressure sensing module integrated thereon.

[0012] A touch glass is fixed to the outer end of the elastomer at the housing and has an ITO rhombic electrode array printed on its inner side. The ITO rhombic electrode array is bonded to the circuit board by anisotropic conductive adhesive.

[0013] A signal transmission interface is provided at the end of the elastomer away from the touch glass and electrically connected to the circuit board for transmitting capacitance and pressure signals to the mobile phone.

[0014] Preferably, the circuit board is a flexible circuit board.

[0015] Preferably, the signal transmission interface is a metal contact, which is fixed to the end of the elastomer away from the touch glass, and the metal contact is soldered to the circuit board.

[0016] Preferably, a silicone sealing ring is provided between the fixing frame and the housing.

[0017] One beneficial technical effect of this application is that, through the coordinated design of the touch glass layer, capacitive sensing module, pressure sensing module, and signal transmission interface, the technical contradiction of traditional mobile phone cases being unable to simultaneously accommodate capacitive touch functionality and physical protection is resolved. The touch glass transmits capacitive signals, preserving the "press + slide" compound operation of the phone's native buttons (such as pressing to start the camera and sliding to adjust the focus); the pressure sensing module accurately detects the pressure applied, supporting multi-level operations (such as light press to focus and heavy press to take a picture); and the combination of touch glass and fixed frame to seal the opening effectively isolates the external environment from the phone's native buttons, reducing the vulnerability of the phone's native buttons to external force damage or liquid intrusion. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a novel mobile phone case structure according to this embodiment.

[0019] Figure 2 This is a cross-sectional view of a novel mobile phone case structure according to this embodiment.

[0020] Figure 3 This is a schematic diagram of the capacitance transmission path in this embodiment.

[0021] Figure 4 This is a schematic diagram of the pressure transmission path in this embodiment.

[0022] Reference numerals: 1. Housing; 11. Back plate; 12. Frame; 121. Opening; 122. Snap ring; 2. Fixing frame; 21. Annular groove; 3. Elastomer; 4. Circuit board; 41. Capacitor detection chip; 42. Charge amplifier; 44. Low-pass filter; 45. Piezoresistive film; 46. Wheatstone bridge; 47. ADC chip; 5. Touch glass; 51. ITO diamond electrode array; 6. Metal contact; 7. Micro lithium battery; 8. Silicone sealing ring; Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] Reference Figure 1 and Figure 2 A novel mobile phone case structure includes a case 1, a fixing frame 2, an elastic body 3, a circuit board 4, a touch glass 5, and a signal transmission interface. The case 1 includes a back panel 11 and a side frame 12 disposed on one side of the back panel 11. The side panel and the side frame 12 enclose the mobile phone to protect it from drops. The side frame 12 is provided with a button area, and the button area has an opening 121. The opening 121 is aligned with the touch buttons on the side of the mobile phone. The case 1 is made of TPU material, the opening 121 is racetrack-shaped, and a racetrack-shaped retaining ring 122 is formed on the outer periphery of the opening 121. The fixing frame 2 is racetrack-shaped and... The material is aluminum alloy, and its outer circumference has an annular groove 21 with a matching size to the retaining ring 122. The fixed frame 2 is fixed in the opening 121 by engaging with the retaining ring 122 through the annular groove 21. The elastic body 3 is filled inside the fixed frame 2 and is tensioned and fitted with the fixed frame 2. The elastic body 3 has a cavity inside. The circuit board 4 is set in the cavity inside the elastic body 3 and integrates a capacitive sensing module and a pressure sensing module. The touch glass 5 is fixed to the elastic body 3 at the outer end of the housing 1, and its inner side is printed with an ITO rhombic electrode array 51. 51 is bonded to the circuit board 4 via anisotropic conductive adhesive. The signal transmission interface is located at the end of the elastic body 3 furthest from the touch glass 5 and connected to the circuit board 4 for transmitting capacitive and pressure signals to the mobile phone. In the above structure, the touch glass 5 is bonded to the circuit board 4 via the ITO rhombic electrode array 51, working in conjunction with the capacitive sensing module to receive user touch and slide operations, transmitting capacitive signals to the circuit board 4, which then transmits them to the signal transmission interface, and finally to the mobile phone, completing the touch linkage with the mobile phone. Pressing the touch glass 5 transmits pressure to the elastic body 3. The elastomer 3 transmits pressure to the pressure sensing module, which in turn transmits the pressure value to the signal transmission interface. The signal transmission interface then acts on the phone to complete the press-linkage with the phone, retaining the "press + slide" compound operation of the phone's native buttons (such as pressing to start the camera and sliding to adjust the focus). The pressure sensing module accurately detects the pressing force and supports multi-level operations (such as light press to focus and hard press to take a picture). Furthermore, the combination of touch glass 5 and fixed frame 2 seals the opening 121 to block the external environment from the phone's native buttons, reducing the phone's native buttons from being easily damaged by external forces or intruded by liquids.

[0025] Reference Figure 2Furthermore, circuit board 4 is a flexible circuit board 4, and the signal transmission interface is a metal contact 6. The metal contact 6 is soldered onto the pads of the flexible circuit board 4, and the metal contact 6 is aligned with the contact point of the side button of the mobile phone. The metal contact 6 has four contacts, namely the first contact, the second contact, the third contact, and the fourth contact. The first contact is connected to the capacitive sensing module for outputting a capacitive signal, the second contact is connected to the pressure sensing module for outputting a pressure signal, the second contact is used for grounding, and the fourth contact is used for power connection. The metal terminal of the mobile phone button has a contact that matches the four contacts. The metal contact 6 makes contact with the corresponding contacts on the metal terminal of the mobile phone button to complete the signal transmission and realize the linkage between the button on the mobile phone and the mobile phone case.

[0026] Reference Figure 2 Furthermore, a micro lithium battery 7 is also provided inside the cavity of the elastomer 3, and the fourth contact of the metal contact 6 and the circuit board 4 are both connected to the micro lithium battery 7 to provide power.

[0027] Reference Figure 2 , Figure 3 and Figure 4 Furthermore, the capacitance sensing module includes a capacitance detection chip 41, a charge amplifier 42, and a low-pass filter 44, while the pressure sensing module includes a piezoresistive film 45, a Wheatstone bridge 46, and an ADC chip 47. The capacitance signal formation path is as follows: the chip drives the ITO prismatic electrode array to emit a high-frequency signal; when a finger touches the touch-sensitive glass, the capacitance of the ITO prismatic electrode array 51 changes. This change in electrode capacitance is conducted through the anisotropic conductive film to the charge amplifier 42 and the low-pass filter 44 for extraction, and the extracted signal is transmitted to the first contact point. The pressure signal formation path is as follows: pressing the elastic body 3 causes the piezoresistive film 45 to deform. The deformation of the piezoresistive film 45 converts pressure into an electrical signal, and the resistance value is accurately measured by the Wheatstone bridge 46 to obtain a precise pressure signal. After processing by the ADC chip 47, a numerical signal is generated and transmitted to the second contact point.

[0028] Reference Figure 2 Furthermore, a silicone sealing ring 8 is provided between the fixing frame and the housing 1 to further prevent water and dust.

[0029] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel mobile phone shell structure, characterized in that: a shell is provided with a key area, and the key area is provided with an opening; a fixed frame is clamped and fixed with the opening of the shell; an elastic body is filled inside the fixed frame, and a cavity is arranged inside the elastic body; a circuit board is arranged in the internal cavity of the elastic body, and a capacitive sensing module and a pressure sensing module are integrated thereon; a touch glass is fixed at the outer end of the shell at the elastic body, and an ITO rhombus electrode array is printed on the inner side of the touch glass, which is bound to the circuit board through anisotropic conductive adhesive; a signal transmission interface is arranged at one end of the elastic body away from the touch glass and is electrically connected with the circuit board for transmitting capacitive and pressure signals to the mobile phone. The circuit board is a flexible circuit board. The signal transmission interface is a metal contact fixed at one end of the elastic body away from the touch glass, and the metal contact is welded with the circuit board. The fixed frame is provided with a silica gel sealing ring between the shell. ​ ​ ​ 2. The novel mobile phone case structure according to claim 1, characterized in that: ​ 3. The novel mobile phone case structure according to claim 1, characterized in that: ​ 4. The novel mobile phone case structure according to claim 1, characterized in that: ​

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