TWI481247B - Handheld mobile device key structure - Google Patents

Description

Key structure of handheld mobile device

The invention provides a button structure of a handheld mobile device, in particular, a button structure that can be used by a user to press and generate a paragraph sense and actually knows to complete the pressing action and improve the input precision, so as to improve the error rate of the touch screen keyboard. Problems and ergonomics can effectively reduce fatigue or undue harm, thereby increasing the efficiency of inputting documents, mail or commercial communication.

According to the current society of electronic technology and Internet information, various electronic products are moving toward a trend of light, short, and powerful functions, such as personal digital assistants (PDAs), smart phones (Smart Phones), or mobile Internet devices (MIDs). With the increasing number and popularity of handheld electronic products, the types and types of them have developed many different styles, mainly characterized by small size, light weight, and easy portability, plus soft, The hardware features continue to evolve, providing functions such as using Office, instant messaging software (MSN, Yahoo Message), and wireless Internet access (Wi-Fi/WLAN), and making the functions of electronic products more diversified. More flexible and practical effects.

However, when the user communicates with the electronic product, the input device is used as the control interface for command operation and software program execution. The input device can be roughly divided into a mouse and a keyboard, and the keyboard is most convenient for writing characters, numbers or The input of instructions, and allows users to directly and quickly write documents, e-mails, messages, and other various functions, which are widely available and willing to be accepted by users.

Generally, the keyboard type is mostly composed of a plurality of buttons in a mechanical pressing manner. The button structure mainly comprises a key cap, an elastic member, a circuit film and a circuit board, and the key cap is supported by the elastic member located in the upper cover. The upper and lower elastic deformation states, after the key cap is electrically connected to the electrical contact on the circuit film, and then the input/output terminal on the circuit film is electrically connected to the circuit board to be pressed on the key cap. The key code is transmitted to the electronic product, and the display can be used for relative display or text, digital and command input actions; however, since the conventional key cap and the circuit film are separately arranged, the pores formed between the two are often dusty. The accumulation of impurities and the possibility of liquid infiltrating into the button, thereby affecting its electrical characteristics and causing errors or ineffective actions, resulting in reduced product reliability and electromagnetic interference (EMI); in addition, the required button structure is required There are many components, in addition to the need to open mold manufacturing, it will also greatly increase the manufacturing process, and at the same time, due to the assembly steps of each component. Inconvenient, the overall production and processing efficiency is reduced, and the labor and cost of processing and assembly are relatively improved. Moreover, since the volume of handheld electronic products tends to be miniaturized to reduce the space occupied, The used buttons still have a certain size after assembly, occupying the external space, affecting the operability of the user pressing on the button, causing inconvenience and difficulty in use, and even having errors caused by simultaneous touching of two adjacent buttons. The problem of command operation or program execution. Therefore, some people have developed such a touch screen that can be input by a user with a finger touch, which is a convenient input device, such as web cursor control and movement. And object dragging and other functions, but because the touch screen and keyboard are not convenient for quick input of text, numbers or instructions, nowadays some companies have developed a handheld device that can integrate the touch screen and keyboard into the same architecture. For electronic products, you can select a suitable input method for different usage states and press the user to touch The key code represented by the button on the screen keyboard is for the display of characters, numbers and command input actions. However, the problems and lack of high error rate caused by the wrong touch and touch accuracy still exist and cannot be For immediate discriminating input, and because of the less ergonomic post operation (Ergonomic Posture), the long-term or repetitive motion (Repetitive Motion) will press the wrist nerve to cause pain, muscle fatigue, fatigue or improper Injury, the keyboard is very limited in the efficiency of input (Key-in) word processing, mail (E-mail) or commercial communication (MSN), thereby reducing the function and effect of the overall use, so the lack of practice is engaged in Those in this industry are eager to study the direction of improvement.

Therefore, the inventor has in view of the fact that the above-mentioned conventional button structure design is not required to have many components, and the assembly is too cumbersome and inconvenient, that is, the operability is not as expected, resulting in inconvenience in use and difficulty in increase, and the accuracy of touch and touch. The problem of high button error rate is poor; it is the collection of relevant information through multiple assessments and considerations, and there are unsatisfactory improvements in the structure of the button used, there is a need to improve, in order to engage in many years of experience in this industry and Through constant trials and revisions, the birth of the invention patent for the button structure of such a handheld mobile device was designed.

The main purpose of the present invention is that when the user hands or the index finger or the middle finger are pressed against the external pressing layer, the elastic member of the inner resisting layer can be pressed against the positioning convex spot on the substrate. The elastic deformation state, with this structural design, can provide a certain paragraph feeling by pressing, but it is sure to complete the pressing action, improve the input precision and speed, and improve the touch of the touch screen keyboard, and the touch accuracy is not good. The problem of high button error rate is high, and the ergonomic posture can be designed to effectively alleviate the fatigue or undue injury caused by long-term or repeated action, thereby enhancing the user's pressing input document processing, mail or commercial communication. The efficiency of the person.

The secondary object of the present invention is that when the user presses on the external pressing layer of the button film, the sensing circuit is formed by the conductor layer and the predetermined circuit substrate, and the two-dimensional position signal sensing can be performed by the control unit. Through the screen of the handheld mobile device, the key code represented by the button is displayed as a relative display, and the button mode input condition can be determined instantly; or when the external pressure layer is touched and circled in each direction or any range, the button can be performed. Different input modes and function operations, and at the same time, the screen of the handheld mobile device will be displayed in relative state, which is convenient for the user to operate, and quickly browses the webpage, long articles, slides and collected images in the webpage search screen. , graphics, etc., in turn, can improve the function and effect of the overall use.

In order to achieve the above objects and effects, the technical means and the configuration of the present invention will be described in detail with reference to the preferred embodiments of the present invention.

Please refer to the first and second figures, which are respectively a schematic structural view and an exploded perspective view of a first preferred embodiment of the present invention. As is apparent from the drawings, the present invention comprises a substrate 1 and a button film 2. ,among them:

The substrate 1 is integrally stamped and formed of a metal material, and the upper surface of the substrate 1 has a plurality of independent arrays and convex protrusions 11 .

The button film 2 is a flexible body and includes at least an external pressing layer 21 and a conductor layer 22, and the external pressing layer 21 can be made of a plastic material for providing a user's finger pressing. Move or the like to prevent infiltration of general dust, impurities or liquids; further, the conductor layer 22 is made of an externally pressed layer 21 of polyethylene terephthalate (PET) or polycarbonate (Polycarbonate). , PC) is sputtered with indium tin OXide (ITO) or screen printed conductive silver paste, conductor, and electrically connected to the input end of the control unit on the preset circuit substrate by the conductor layer 22 (Input Port The position signal sensing or the input mode switching action is performed; the inner surface of the conductor layer 22 is integrally formed or separately formed with the inner resisting layer 23, and the adhesive effect may be adhered by an adhesive or a resin or a tape. The material is adhered to the lower surface of the conductor layer 22, and the inner resisting layer 23 can be made of a rubber material, and the lower surface of the inner resisting layer 23 has a plurality of elastic members 24 which can be aligned with the positioning bumps 11 of the substrate 1. And the elastic member 24 Resisting positioned above the bump 11 to which the support film 2 has a key, the elastically deformed state.

In addition, the external pressing layer 21 of the button film 2 may be made of a flexible plastic material such as polyethylene terephthalate or polycarbonate, and is disposed on the external pressing layer 21, The lower surface can be further laser-engraved, etched or screen-printed in a single layer or multi-layer color processing to make the pattern or font, text clearly displayed on the surface, and after drying, heat treatment, color pattern or The text can reach a stable state; then the conductive silver paste or conductor can be printed on the lower surface of the external pressing layer 21 by screen printing to form a multi-axis X-axis and Y-axis grid circuit wiring. The conductor layer 22 of 221 is disposed between the two circuit wires 221 and the outer surface is coated with an insulating layer 222 (such as UV glue), and the insulating layer 222 can be photocured by ultraviolet light (Ultra Violet, UV). The utility model has the functions of protection and insulation; the vacuum adsorption device is adsorbed on the flat outer surface and transported to the fixture to press the button film 2 into a semi-finished product having a groove 25 (such as a V-shaped groove) through high-pressure processing, and Adjacent concave The slot 25 divides and divides a plurality of buttons in an array shape; and the semi-finished product of the button film 2 can be cut according to the user's needs or design, and is cut into a predetermined number of buttons, and then placed in the injection mold to be elastically molded. The inner resisting layer 23 of the member 24 can be processed by an Insert Mold Decoration (IMD), and the internal resisting layer 23 can also be an acrylonitrile-butadiene propylene-styrene copolymer ( Acrylonitrile-butadiene-styrene (ABS), Polycarbonate (PC), Silicone Rubber (Silicon Rubber Plastic) or other plastic materials with plastic deformation and softness can be integrally formed by this method and process steps. The key film 2 of the present invention is finished, and has the utility of convenient mass production and easy quality control, and is more convenient to be assembled with the substrate 1 on the handheld mobile device 3 (as shown in the fourth figure). The substrate 1 and the button film 2 shared by the above-mentioned modules can reduce the components required for the overall button structure after being combined, and can greatly simplify the manufacturing process without increasing the need for a separate mold. The processing efficiency, in turn, can effectively reduce the processing, assembly man-hours and costs, so any form that can achieve the aforementioned effects should be covered by the present invention, and such simple modifications and equivalent structural changes should be similarly included in the present invention. Within the scope of the patent, it is given to Chen Ming.

The preferred embodiment of the circuit wiring 221 of the conductor layer 22 of the present invention has a plurality of conductive silver wires in the X-axis direction and a plurality of conductive silver wires in the Y-axis direction. However, the present invention is applicable to practical applications. It is not limited thereto, and the conductive silver paste or conductor may be printed on the lower surface of the substrate 1 by a screen printing process as a conductor having a plurality of X-axis or Y-axis direction circuit wirings 121 (as shown in the third figure). The layer 12, and the lower surface of the conductor layer 12, may also be coated with an insulating layer 122, which only needs to provide the conductor layer 12 of the substrate 1 to be arranged at intervals corresponding to the conductor layer 22 of the external pressure layer 21 to become X. The grid-like circuit wirings 121 and 221 in the axial and Y-axis directions are electrically connected to the control unit on the predetermined circuit substrate by the circuit wirings 121 and 221 (for example, ARM (Advanced RISC Machines) used in the embedded system) a predetermined signal input end of the processor, the sensing chip or the electronic component such as a memory, and then the control unit performs two-dimensional position signal sensing or converts the two-dimensional position signal into different input modes (such as button mode, webpage reel mode) Drag mode It is a switching operation such as a cursor control movement. However, the above-mentioned control unit performs a position signal sensing, a conversion input mode, and the like on the conductor layer 22, and is a well-known technique, and the configuration of the detail is not the main point of the present invention, so the present invention is not affected. The scope of the invention patent is not repeated here.

Please refer to the first, third, fifth and sixth figures, which are respectively a schematic structural view of the first preferred embodiment of the present invention, a schematic structural view of the second preferred embodiment, and a schematic diagram of the fourth preferred embodiment when used. And a schematic diagram of the fifth preferred embodiment when used, it can be clearly seen that the handheld mobile device 3 can be a Personal Digital Assistant (PDA), a smart phone (SmartPhone) or other mobile Internet device ( Handheld electronic products such as Mobile Internet Device (MID), and the substrate 1 and the button film 2 of the button structure of the present invention can be further assembled into the hand-held mobile device 3 in a simpler and quicker manner, so that the key film 2 is internally resisted by the layer 23 After the elastic member 24 is aligned with the positioning bump 11 on the substrate 1, the user touches the external pressing layer 21 of the button film 2 with the thumb or the index finger, the middle finger, and the like. When the surface is formed, the two circuit wires 221 of the conductor layer 22 form a sensing circuit with the predetermined circuit substrate, and the sensing unit can simultaneously perform sensing and interactive processing of the plurality of two-dimensional position signals. Through the screen 31 on the handheld mobile device 3, the key code represented by the button is displayed as a relative screen, and the button mode input is instantly determined. If the screen display is determined to be the designated button, the button can be directly pressed down. The input action of the characters, numbers or commands also causes the elastic members 24 on the lower surface of the inner resisting layer 23 to abut against the positioning bumps 11 aligned on the substrate 1, so that the elastic members 24 are elastic when subjected to the pressing force. The deformation state, with this structural design, can provide a certain click feeling (Click & Tactile Feeling) when the user presses the button, and actually knows that the pressing action is completed, the input precision and speed are improved, and the touch screen keyboard is improved. Mistakes and poor touch accuracy result in high button error rate, and can be ergonomically designed to effectively reduce fatigue or undue damage caused by long-term or repeated movements, thereby enhancing the user's The efficiency of pressing key-in document processing, mail (E-mail) or commercial communication (MSN, Yahoo Message, Skype).

Furthermore, the button structure of the present invention can be further provided with an indicator module 32, and the indicator module 32 is electrically connected to the control unit on the preset circuit substrate, and the indicator module 32 includes at least one The above group consists of activity LEDs, fault LEDs or status LEDs, which are used to display the conductor layer 12, 22X axis and Y-axis grid connected to the signal input end. The circuit wirings 121 and 221 are in a use state.

In use, the two-dimensional position signal sensing or the two-dimensional position signal can be converted into different input modes by the preset circuit board control unit of the handheld mobile device 3, such as a button mode and a webpage reel mode. a drag mode or a cursor control movement, wherein when the user touches the upper surface of the outer pressure layer 21 of the key film 2 of the present invention with the left or right hand thumb or index finger, middle finger, or the like, and moves to the left or right, That is, the function of dragging the object, so that the screen of the screen 31 of the handheld mobile device 3 will also move to the left or right, or to collect the picture, the picture to the previous or the next, the previous page or the next One-page action, and during the movement of the finger, the light can be gradually increased by the indicator light module 32 or evacuated to a tight display for instructing the user to touch and press on the surface of the key structure for input operation. In addition, the present invention forms a keyboard type by dividing a plurality of buttons in an array of adjacent grooves 25 or patterns, fonts, and arrays. The keyboard is equivalent to a cursor. Touch the pattern (Icon) or font on the surface of each button to select the position corresponding to the cursor, or find a specific position in the file and data, and press it with another finger while the cursor is moving. After any button is pressed, the cursor is positioned at a specific position; further, the keyboard formed by the present invention can independently set the function key 33, and will not be generated when the user's two fingers touch the same function key 33. The position signal is triggered. If any of the function keys 33 is touched, a specific function will appear. Press the button C to copy the selected object. If the function button 33 is touched by any button and moved to the left, right or forward and backward, the multimedia volume adjustment or the brightness and contrast of the screen 31 can be performed. Setting functions and the like, together with the indicator module 32 for bright display of each use state, to facilitate the user's easy operation; further, the user touches the button of the present invention with the left and right hand fingers or the index finger, the middle finger, and the like. When the external pressing layer 21 of the film 2 is moved forward or backward or circled in any range, the webpage reel function is provided, and the screen 31 of the handheld mobile device 3 is used to make the reel perform the scrolling state. The display can be easily operated by the user, and can quickly browse the webpage, long articles, slides, and collect images, graphics, etc. in the webpage search screen, thereby significantly improving the functions and effects of the overall use.

Moreover, the lower surface of the substrate 1 can be further provided with the circuit module 4, and the circuit module 4 can be composed of the flexible circuit board 41 or the circuit board 42, and has a surface on the flexible circuit board 41 or the circuit board 42. Circuit wiring (a plurality of conductive silver wires or copper wires in the X-axis and Y-axis directions) and a plurality of switch contacts (as shown in FIGS. 7 and 8), and further, the positioning bumps 11 of the substrate 1 of the present invention are preferably implemented. It is stamped and formed by metal material, and can also be made of thin, light and transparent Mylar sheet (Mylar, made of polyester film and PET material), and when the user presses on the upper surface of the button film 2 and is attached When the positioning bumps 11 on the substrate 1 are pressed against, the positioning bumps 11 are elastically deformed by the pressing force, and are resisted by the X-axis and Y-axis conductive silver wires of the flexible circuit board 41. Forming a sensing circuit with the preset circuit substrate, or forming a conductive connection on the switch contacts corresponding to the X-axis and Y-axis copper wires of the circuit board 42 for the user to press and output a control signal to reach the signal When the effect of the conduction is triggered, the control unit can simultaneously perform multiple two-dimensional position signals. After the sensing and interactive processing, the screen 31 represented by the button is used as a relative screen display and a text, number or command input operation through the screen 31 of the handheld mobile device 3; further, the preferred embodiment of the present invention is The elastic member 24 of the button film 2 in the inner resisting layer 23 is aligned with the positioning protrusion 11 of the substrate 1, and when the user presses on the surface of the button film 2, the elastic member 24 is resisted to the positioning convex. The elastic deformation state above the point 11 is explained. However, in the practical application, the present invention is not designed with the inner resisting layer 23, and the insulating layer 222 of the outer surface of the conductor layer 22 is directly connected to the substrate 1. The positioning bumps 11 form an abutting contact, which only needs to provide the pressing of the button film 2 to cause the positioning bumps 11 to be elastically deformed by a pressing force to generate a certain paragraph feeling; and the external pressure of the button film 2 The movable layer 21 can also be made of a thin, light-weight transparent Mylar sheet (polyester film-PET material), and further coated on the upper surface of the external pressing layer 21 to form a film layer. 211 (such as UV glue), and can use purple Light (UV) photo-curing the film layer 211 to form the external pressure-sensitive layer 21 having a certain thinness and good overall gloss, so that the surface feel and the smoothness of the pressing are excellent (as shown in the ninth figure). The present invention is intended to be inclusive of the present invention, and such simple modifications and equivalent structural changes are included in the scope of the present invention and are incorporated in the specification.

Therefore, in the actual use of the button structure of the handheld mobile device of the present invention, the key to improving the conventional technology is:

1. The button structure of the invention can be integrally formed and has the utility of convenient mass production and easy quality control, and the whole is more convenient to be assembled with the base 1 on the handheld mobile device 3, and the module is shared. After the substrate 1 and the button film 2 are combined, the components required for the overall button structure can be reduced, and the manufacturing process can be greatly simplified without further opening of the mold, thereby improving the production and processing efficiency, thereby effectively reducing the processing and assembly. Working hours and costs.

2. The present invention is such that the user can press the external pressing layer 21 of the button film 2 with both hands and fingers, and the elastic member 24 of the inner resisting layer 23 abuts the positioning bump 11 aligned on the substrate 1 so that the positioning bump 11 is aligned with the substrate 1 The pressing force is elastically deformed to provide a certain paragraph feeling by pressing, and the pressing operation is surely completed, the input precision and speed are improved, and the touch screen keyboard is improved due to misunderstanding and poor touch accuracy. The problem is higher, and the ergonomic posture can be designed to effectively reduce fatigue or undue harm, thereby improving the efficiency of the user input.

3. The plurality of X-axis or Y-axis circuit wirings 121 and 221 of the conductor layer 22 of the present invention are electrically connected to the signal input end of the predetermined circuit board control unit to form a sensing loop, and the control unit performs a two-dimensional position. The signal is sensed or converted into different input modes, and the key code represented by the button is relatively displayed through the screen 31 on the handheld mobile device 3 to instantly determine the key mode input.

4. In the present invention, when the user can touch the upper surface of the external pressing layer 21 of the button film 2 through the thumb and draw circles in various directions or any range, different input modes and function operations can be performed, and at the same time, The screen 31 of the handheld mobile device 3 displays the state of use for relative display, which facilitates the user's easy operation, and quickly browses the webpage, long articles, slides, and images, drawings, etc. in the webpage search screen, and then Improve the function and effect of its overall use, and be more competitive.

5. The key film 2 of the present invention is a planar layered structure composed of an outer pressing layer 21, a conductor layer 22 and an inner resisting layer 23, thereby reducing the pores formed by the separate key caps and circuit films. There is dust, accumulation of impurities, or the possibility of liquid infiltrating into the button, which affects the electrical characteristics and causes errors or invalid actions.

The above detailed description is intended to be illustrative of a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and other equivalents and modifications may be made without departing from the spirit of the invention. Changes are intended to be included in the scope of the patents covered by the present invention.

In summary, the button structure of the handheld mobile device of the present invention can achieve its efficacy and purpose when used, so the invention is an invention with excellent practicability, in order to comply with the invention patent, the application requirements, and apply according to law. I hope that the trial committee will grant this case as soon as possible to protect the inventor's hard work. If there is any doubt in the trial committee, please do not hesitate to give instructions, the inventor will try his best to cooperate and feel polite.

1. . . Base

11. . . Positioning bump

12. . . Conductor layer

121. . . Circuit wiring

122. . . Insulation

2. . . Button film

twenty one. . . External pressure layer

211. . . Film layer

twenty two. . . Conductor layer

221. . . Circuit wiring

222. . . Insulation

twenty three. . . Internal resistance layer

twenty four. . . Elastic part

25. . . Groove

3. . . Handheld mobile device

31. . . Screen

32. . . Indicator module

33. . . Function key

4. . . Circuit module

41. . . Flexible circuit board

42. . . Circuit board

The first figure is a schematic structural view of a first preferred embodiment of the present invention.

The second drawing is an exploded perspective view of the first embodiment of the present invention.

The third figure is a schematic structural view of a second preferred embodiment of the present invention.

The fourth drawing is a perspective view of a third preferred embodiment of the present invention.

The fifth drawing is a schematic view of the fourth preferred embodiment of the present invention.

Figure 6 is a schematic view showing the fifth preferred embodiment of the present invention when it is used.

Figure 7 is a schematic view showing the structure of a sixth preferred embodiment of the present invention.

Figure 8 is a schematic view showing the structure of a seventh preferred embodiment of the present invention.

Figure 9 is a schematic view showing the structure of an eighth preferred embodiment of the present invention.

1. . . Base

11. . . Positioning bump

2. . . Button film

twenty one. . . External pressure layer

twenty two. . . Conductor layer

221. . . Circuit wiring

222. . . Insulation

twenty three. . . Internal resistance layer

twenty four. . . Elastic part

25. . . Groove

Claims (13)

A key structure of a handheld mobile device includes a substrate and a button film, wherein: the substrate is a positioning bump having a plurality of independent arrays and having a convex shape; the button film includes an external pressing layer and a conductor layer, and The conductor layer is electrically connected to the input end of the control unit on the predetermined circuit substrate for position signal sensing, and the button film is pressed against the positioning bump to exhibit an elastic deformation state, and the button film is a fixture. The plurality of grooves are pressed by high-pressure machining, and a plurality of buttons in an array shape are divided by adjacent grooves, and then placed in the injection mold to be injection molded with an internal resist layer. The button structure of the handheld mobile device according to claim 1, wherein the button film is integrally formed or separately formed on the lower surface of the conductor layer, and has an inner resisting layer on the lower surface of the inner resisting layer. Resisting a plurality of elastic members which are elastically deformed up and down on the base positioning bump. The key structure of the handheld mobile device according to claim 2, wherein the internal resisting layer is acrylonitrile-butadiene propylene-styrene copolymer, polycarbonate, silicone or other plastic deformation function. Made of soft plastic material. The button structure of the handheld mobile device according to claim 1, wherein the substrate is integrally stamped and formed of a metal material. The key structure of the handheld mobile device as described in claim 1 of the patent scope, The lower surface of the substrate is printed with a conductive silver paste or conductor into a conductor layer having a plurality of X-axis and Y-axis circuit wirings by screen printing, and the lower surface of the conductor layer is coated with an insulating layer. The key structure of the handheld mobile device according to claim 5, wherein the insulating layer is a UV adhesive and is photocured by ultraviolet light to have a protection and insulation function. The button structure of the handheld mobile device according to claim 1, wherein the external pressure layer is made of flexible plastic material such as polyethylene terephthalate or polycarbonate. The user's finger is provided for pressing, moving, and the like. The key structure of the handheld mobile device according to claim 1, wherein the external pressure layer surface is processed by laser engraving, etching coloring or screen printing in a single layer or multi-layer color processing to make the pattern or The font and text are clearly displayed on the surface. The button structure of the handheld mobile device according to claim 1, wherein the conductor layer is formed by sputtering an indium tin oxide or a screen printing conductive silver paste on the external pressing layer to have a plurality of X-axis and Y-axis directions. The two conductor layers of the circuit wiring are coated with an insulating layer between the two conductor layers and the outer surface. The button structure of the handheld mobile device according to claim 9, wherein the insulating layer is a UV glue and is photocured by ultraviolet light to have a protection and insulation function. The key structure of the handheld mobile device as described in claim 1 of the patent scope, The lower surface of the substrate is provided with a circuit module, and the circuit module is composed of a flexible circuit board having a plurality of conductive silver wires in an X-axis and a Y-axis direction, and forms a sensing circuit with the preset circuit substrate. The key structure of the handheld mobile device according to claim 1, wherein the lower surface of the substrate is provided with a circuit module, and the circuit module is a circuit having a plurality of copper wires and switch contacts in the X-axis and Y-axis directions. The plate is formed, and the positioning bumps are pressed and resisted to form electrical conduction on the switch contacts corresponding to the X-axis and Y-axis copper wires of the circuit board. The button structure of the handheld mobile device according to claim 1, wherein the surface of the external pressure layer is coated with a film layer, and the film layer can be UV glue, and can be photocured by ultraviolet light to form a film. The externally pressed layer of a certain thinness makes the surface feel and the sliding smoothness is excellent.