CN104850175A - Protective device with key function - Google Patents

Abstract

The invention relates to a protective device with a key function, which comprises a trigger layer, a printed circuit board and a base. The printed circuit board is provided with a plurality of first connecting points which are arranged on the upper surface of the printed circuit board. The trigger layer is located above the printed circuit board and provided with a plurality of second contacts. The trigger layer is also provided with a plurality of cured resins between the trigger layer and the printed circuit board for separating the plurality of first contacts and the plurality of second contacts. The protective device with the key function utilizes the trigger layer, the printed circuit board and the plurality of cured resins to replace keys and a film switch circuit of the conventional keyboard device, so that the protective device has thinner thickness and is convenient for a user to operate and carry.

Description

Protective device with key function

technical field

The invention relates to a protection device, in particular to a protection device with a button function applied to a tablet computer.

Background technique

Along with the evolution of science and technology, a kind of tablet computer is released on the market. The tablet computer has a thin and light appearance, similar to a liquid crystal screen, and the screen of the tablet computer is a touch screen, so the tablet computer can operate the tablet computer by inputting instructions through the touch screen. When the user operates the tablet computer and needs to input text or symbols, the touch screen of the tablet computer will display a keyboard image simulating a real keyboard device, and the user can touch each image on the keyboard image to input corresponding text or Symbols, so the tablet computer can directly input text or symbols without being connected to a keyboard device.

Since the tablet computer adopts a touch screen, when the screen is damaged, the handling of the tablet computer will be affected, so the protection of the screen is very important. Therefore, a protective device for a tablet computer is introduced on the market. Please refer to FIG. 1 , which is a structural schematic diagram of a conventional tablet computer protection device in an operating state. The protective device 1 of the existing tablet computer is used to store the tablet computer 2 therein and can protect the tablet computer 2 and a screen 20 of the tablet computer 2. The protective device 1 of the existing tablet computer includes a base 10 and an upper cover 11, the base 10 has a fixing hook 101 for fixing the tablet computer 2 on the base 10 when the tablet computer 2 is placed on the base 10 . The upper cover 11 is connected to the base 10 and can rotate relative to the base 10. When the upper cover 11 rotates relative to the base 10 to form an angle A with the base 10, the tablet computer 2 fixed on the base 10 can be used ,As shown in Figure 1. When the upper cover 11 rotates relative to the base 10 to cover the base 10 , the tablet computer 2 fixed on the base 10 is covered and protected by the upper cover 11 , as shown in FIG. 2 .

Although the tablet computer 2 has a thin and light appearance and does not need an external keyboard device and is easy to carry, users who are accustomed to general personal computers or notebook computers still cannot adapt to using a touch screen to input text or symbols, so many users will An additional external keyboard device is prepared and connected to the tablet computer 2, and the tablet computer 2 is placed on a support that can support the tablet computer 2 such as a bookshelf, that is, the touch screen 20 of the tablet computer 2 is regarded as a general screen , and use an external keyboard device to input text or symbols, wherein the external keyboard device can be connected to the tablet computer 2 through a universal serial bus (Universal Serial Bus, USB), or it can be connected to the tablet computer 2 through a wireless transmission module The wireless transmission mode is connected to the tablet computer 2 . Although the above-mentioned setting method allows the user to operate the tablet computer in a habitual way, when the user wants to carry the tablet computer, an additional external keyboard device must be carried; otherwise, the user can choose not to carry the external keyboard device and use Unaccustomed ways to directly use the keyboard image on the touch screen to input text or symbols. If the user wishes to operate the tablet computer in the usual way, he must carry an additional external keyboard device.

Next, the structure of the existing external keyboard device will be briefly described. Please refer to FIG. 3 , which is an exploded schematic view of the structure of the existing external keyboard device. The existing external keyboard device 3 includes a plurality of keys 30 (only one is shown in the figure), a support plate 31 , a membrane switch circuit 32 , a main circuit board 33 and a base 34 . Wherein, each button 30 includes a button cap 301, a scissors-type connection element 302 and an elastic element 303, the support plate 31 includes a plurality of support plate openings corresponding to the plurality of keys 31 (only one is shown in the figure), and The membrane switch circuit 32 includes an upper circuit board 321 , an isolation layer 322 and a lower circuit board 323 . In the existing external keyboard device 3, the above-mentioned components are arranged from top to bottom in the order of key cap 301, scissors-type connection component 302, elastic component 303, support plate 31, upper circuit board 321, isolation layer 322, lower circuit board 323 and the base 34, and the main circuit board 33 is located on one side of the membrane switch circuit 32. Wherein, the upper circuit board 321 includes a plurality of upper contacts 3211 corresponding to a plurality of keycaps 301, and the lower circuit board 323 includes a plurality of lower contacts 3231 corresponding to a plurality of upper contacts 3211, and the isolation layer 322 includes a plurality of contacts corresponding to a plurality of A plurality of openings (not shown in the figure) for the upper contact 3211.

It should be noted that the existing external keyboard device 3 further includes an upper cover (not shown in the figure), which has a plurality of openings on the upper cover corresponding to the plurality of key caps 301, for providing a plurality of key caps 301 , a plurality of scissor-type connecting elements 302 and a plurality of elastic elements 303 pass through, so that the upper cover can be covered above the support plate 31 . Due to the structure of the plurality of key caps 301, the plurality of scissor-type connecting elements 302 and the plurality of elastic elements 303, the plurality of key caps 301 are exposed on the upper surface of the existing external keyboard device 3 (that is, the upper surface of the upper cover) and be pressed by the user. Wherein, the height of the upper surfaces of the plurality of key caps 301 is higher than that of the existing external keyboard device 3 , so as to conform to the feature that the general keys present a raised appearance.

When the user touches the key cap 301 , the key cap 301 moves downwards in response to the touch pressure, and drives the corresponding scissor-type connecting element 302 to swing, so that the corresponding elastic element 303 is squeezed by the key cap 301 to deform. At this time, the deformed elastic element 303 passes through the opening of the support plate to press the corresponding upper contact 3211 , and the upper contact 3211 passes through the corresponding opening to contact the lower contact 3231 to generate a key signal. The key-press signal is transmitted to the main circuit board 33, and is transmitted to the computer host (not shown in the figure) connected to the existing external keyboard device 3, so that the computer host performs the corresponding key-press work.

However, it is quite inconvenient for the user to carry the external keyboard device and the tablet computer separately. If the user does not wish to carry an additional external keyboard device, he must directly use the keyboard image on the touch screen to input text or symbols. Both of the above two methods bring troubles to users.

In response to the above problems, a protective device with a keyboard device is introduced on the market, which includes a base and a top cover. Computer is on it, in short, it is that existing external keyboard device 3 is arranged on the base. Therefore, the user can operate the tablet computer in a customary input mode through the keyboard device for the tablet computer. In addition, the tablet computer can also be fixed on the upper cover for easy portability.

However, when the existing protective device with the keyboard device is in the stored state, the tablet computer will overlap the keyboard device. At this time, the thickness of the existing protective device with the keyboard device is equal to the thickness of the tablet computer plus the thickness of the keyboard device and the thickness of the keyboard device. The thickness of the protective device is too large to be portable, wherein the thickness of the keyboard device is about 4 mm to 6 mm. Therefore, there is a need for a light and thin protective device with key function.

Contents of the invention

The technical problem to be solved by the present invention is to provide a thinner and thinner protection device with key function in view of the above-mentioned deficiencies in the prior art.

The technical solution adopted by the present invention to solve the technical problem is to provide a protection device with key function, which is used to connect a tablet computer and store the tablet computer therein. The protection device with key function includes a base, a printed circuit board and trigger layer. The printed circuit board is located above the base, and the printed circuit board has a plurality of first contacts, and the plurality of first contacts are arranged on an upper surface of the printed circuit board. The trigger layer is located above the printed circuit board and exposed on an inner surface of the protection device, and is used to generate a plurality of button signals together with the plurality of first contacts of the printed circuit board. The trigger layer includes a contact surface layer, a second A plastic sheet, conductive circuit layers and a plurality of cured resins. The contact surface layer is exposed on the inner surface of the protective device, and the contact surface layer has a plurality of contact areas, each of the contact areas is located above a corresponding first contact; and the first plastic sheet is arranged on the contact surface layer look on the surface. The conductive circuit layer is disposed on the lower surface of the first plastic sheet, the conductive circuit layer has a plurality of second contacts, each of the second contacts corresponds to a contact area. The plurality of cured resins are disposed between the first plastic sheet and the printed circuit board, and each cured resin is located between every two second contacts to separate the plurality of first contacts and the plurality of second contacts. Wherein, when the contact area is pressed, the second contact point corresponding to the contact area extends between the adjacent two cured resin layers and contacts with the corresponding first contact point, so as to generate the corresponding key signal to the tablet.

Preferably, the contact surface layer is made of synthetic leather with a thickness of 0.4 to 0.6 mm, and the contact surface layer and the first plastic sheet are bonded by an adhesive, and the printed circuit board and the base are bonded by adhesive, and the plurality of first contacts are formed by a plurality of copper foils distributed on the upper surface of the printed circuit board, and the plurality of cured resins are attached to the first plastic through a curing technique on the lower surface of the sheet.

Preferably, the protective device further includes a second plastic sheet, which is located between the contact surface layer and the first plastic sheet, to make the contact surface layer flat; wherein the second plastic sheet is in contact with the contact surface The surface layers are bonded by an adhesive, and the second plastic sheet and the first plastic sheet are also bonded by an adhesive.

Preferably, the base includes a support plate, a first protection plate and a third plastic sheet, the support plate is arranged under the printed circuit board to support the printed circuit board; the first protection plate is located on the support plate Below and exposed on an outer surface of the protection device, used to carry the trigger layer and the printed circuit board and protect the trigger layer and the printed circuit board; the third plastic sheet is located between the first protection plate and the support plate space for flattening the first protective plate.

Preferably, the first protection board is made of synthetic leather with a thickness of 0.4 to 0.6 mm, and the first protection board and the third plastic sheet are bonded by an adhesive, and the support board and the The third plastic sheet is bonded by an adhesive.

Preferably, the protection device also includes an upper cover, a rechargeable battery, a charging module and a wireless transmission module. The upper cover is connected to the base for turning over relative to the base to cover the trigger layer, and the upper cover includes a second protective plate, a folding structure and a plurality of fixing elements, the second protective plate is connected to the base A first protective plate is used to carry the tablet computer on it, and can be turned over relative to the first protective plate to cover the trigger layer; the folding structure is arranged on the second protective plate to make the The second protection board is folded to support the tablet computer; the plurality of fixing elements are arranged on the second protection board and exposed outside the second protection board, for fixing the tablet computer on the upper cover. The rechargeable battery is arranged on the base and connected to the printed circuit board for providing power to the printed circuit board. The charging module is arranged on the base and connected to the rechargeable battery for charging the rechargeable battery. The wireless transmission module is arranged on the base and connected to the rechargeable battery, and is used for transmitting the plurality of button signals to the tablet computer through a wireless transmission technology.

The present invention also provides a protection device with key function, which is used to connect to a tablet computer and store the tablet computer therein. The protection device with key function includes a base, a printed circuit board and a trigger layer. The printed circuit board is located above the base, and the printed circuit board has a plurality of first contacts, and the plurality of first contacts are arranged on an upper surface of the printed circuit board. The trigger layer is located above the printed circuit board and exposed on an inner surface of the protection device, and is used to generate a plurality of key signals together with the plurality of first contacts of the printed circuit board. The trigger layer includes a contact surface layer, a conductive The circuit layer and the first plastic sheet. The contact surface layer is exposed on the inner surface of the protection device, and the contact surface layer has a plurality of contact areas, each of the contact areas is located above a corresponding first contact; and the conductive circuit layer is arranged on the bottom of the contact surface layer On the surface, the conductive circuit layer has a plurality of second contacts, and each second contact corresponds to a contact area. The first plastic sheet is disposed between the contact surface layer and the printed circuit board and adjacent to the plurality of second contacts, the first plastic sheet has a plurality of openings, and each of the openings corresponds to a first contact. A contact, the first plastic sheet is used to separate the plurality of first contacts and the plurality of second contacts; wherein when the contact area is pressed, the second contact corresponding to the contact area extends into the corresponding The hole is opened to contact with the corresponding first contact, so as to generate the corresponding key signal to the tablet computer.

Preferably, the contact surface layer is made of synthetic leather with a thickness of 0.4 to 0.6 mm, and the contact surface layer and the first plastic sheet are bonded by an adhesive, and the printed circuit board and the base are bonded by Adhesive and bonding, and the plurality of first contacts are formed by a plurality of copper foils distributed on the upper surface of the printed circuit board, and the first plastic sheet and the printed circuit board are bonded by adhesive glue.

Preferably, the base includes a support plate, a first protection plate and a second plastic sheet, the support plate is arranged under the printed circuit board to support the printed circuit board; the first protection plate is located on the support plate Underneath and exposed on an outer surface of the protection device, it is used to carry the trigger layer and the printed circuit board and protect the trigger layer and the printed circuit board; the second plastic sheet is located between the first protection plate and the support plate space for flattening the first protective plate.

Preferably, the first protection board is made of synthetic leather with a thickness of 0.4 to 0.6 mm, and the first protection board and the second plastic sheet are bonded by an adhesive, and the support board and the The second plastic sheet is bonded by an adhesive.

Preferably, the protection device also includes an upper cover, a rechargeable battery, a charging module and a wireless transmission module. The upper cover is connected to the base for turning over relative to the base to cover the trigger layer, and the upper cover includes a second protective plate, a folding structure and a plurality of fixing elements, the second protective plate is connected to the base A first protective plate is used to carry the tablet computer on it, and can be turned over relative to the first protective plate to cover the trigger layer; the folding structure is arranged on the second protective plate to make the The second protection board is folded to support the tablet computer; the plurality of fixing elements are arranged on the second protection board and exposed outside the second protection board, for fixing the tablet computer on the upper cover. The rechargeable battery is arranged on the base and connected to the printed circuit board for providing power to the printed circuit board. The charging module is arranged on the base and connected to the rechargeable battery for charging the rechargeable battery. The wireless transmission module is arranged on the base and connected to the rechargeable battery, and is used for transmitting the plurality of button signals to the tablet computer through a wireless transmission technology.

The protection device with button function of the present invention is formed by laminating a multi-layer structure, and a plurality of first contacts are arranged on the printed circuit board, and a plurality of second contacts are arranged on the trigger layer, and between the trigger layer and the printed circuit board A plurality of cured resins or first plastic sheets are arranged between the plurality of first contacts and the plurality of second contacts, so that the trigger layer and the printed circuit board can jointly generate a plurality of key-press signals, that is, the protection device has a key-press function. That is to say, the protection device with key function of the present invention utilizes trigger layer, printed circuit board and multiple cured resin or first plastic sheet to replace the key cap, scissors type connecting element, elastic element, supporting plate and the existing external keyboard device. Compared with the existing external keyboard device, the membrane switch circuit has thinner thickness and lighter weight, which is convenient for users to operate and carry.

Description of drawings

Fig. 1 is a structural schematic diagram of an existing protective device for a tablet computer in an operating state.

Fig. 2 is a structural schematic diagram of a conventional tablet computer protection device in a storage state.

Fig. 3 is an exploded schematic diagram of the structure of the existing external keyboard device.

Fig. 4 is a schematic structural diagram of the protection device with key function in the first preferred embodiment of the present invention.

Fig. 5 is an exploded schematic diagram of the structure of the protection device with key function in the first preferred embodiment of the present invention.

Fig. 6 is a schematic side view of the exploded structure of the protection device with key function in the first preferred embodiment of the present invention.

Fig. 7 is a structural schematic diagram of the protective device with key function in the first preferred embodiment of the present invention in an operating state.

Fig. 8 is a schematic structural view of the protective device with key function in the first preferred embodiment of the present invention in a stored state.

Fig. 9 is a schematic structural view of the protection device with key function in the second preferred embodiment of the present invention in an operating state.

Fig. 10 is a schematic side view of the disassembled structure of the second preferred embodiment of the protection device with button function of the present invention.

Detailed ways

In view of the problems of the prior art, the present invention provides a protection device with key function which can solve the problems of the prior art. Please refer to FIG. 4 and FIG. 5 at the same time. FIG. 4 is a schematic structural view of the first preferred embodiment of the protection device with key function of the present invention, and FIG. 5 is a first preferred implementation of the protection device with key function of the present invention. Schematic breakdown of the structure in the example. The protection device 4 with button function of the present invention is used to connect a tablet computer 5 (please refer to FIG. 7 ) and accommodate the tablet computer 5 therein. The circuit board 42 , a trigger layer 43 , a rechargeable battery 44 , a charging module 45 , a first wireless transmission module 46 and a protective cover 47 . The upper cover 41 is connected to the base 40 , and is used to turn over the base 40 to cover the trigger layer 43 , that is, to make the protection device 4 with key function in a storage state. The printed circuit board 42 is located above the base 40 and the printed circuit board 42 has a plurality of first contacts 421 (only three are shown in FIG. 42 on an upper surface 422 . The trigger layer 43 is located above the printed circuit board 42 and exposed on an inner surface 404 of the protection device 4 , and is used for generating a plurality of key signals together with the plurality of first contacts 421 of the printed circuit board 42 .

The rechargeable battery 44 is disposed on the base 40 and connected to the printed circuit board 42 for providing power to the printed circuit board 42 . The charging module 45 is arranged on the base 40 and connected to the rechargeable battery 44 for charging the rechargeable battery 44. The charging module 45 has a connection hole 451 for one end of a connecting wire (not shown in the figure). The other end of the cable is connected to a power supply (not shown in the figure), so that the charging module 45 can obtain power from the power supply and provide the power to the rechargeable battery 44 . And the first wireless transmission module 46 is arranged on the base 40 and connected to the rechargeable battery 44, in order to transmit a plurality of button signals to the tablet computer 5 by a wireless transmission technology, wherein the first wireless transmission module 46 is rechargeable battery 44 for power. The protective cover 47 is disposed on the base 40 and covers the charging module 45 and the first wireless transmission module 46 to protect the charging module 45 and the first wireless transmission module 46 .

Please refer to FIG. 7 , which is a structural schematic view of the protection device with key function in the first preferred embodiment of the present invention in an operating state. The tablet computer 5 includes a display screen 50 and a second wireless transmission module 51. The display screen 50 is exposed outside the tablet computer 5, and is used for displaying a picture and generating touch signals in response to user operations. The second wireless transmission module 51 is disposed inside the tablet computer 5 for connecting to the first wireless transmission module 46 through wireless transmission technology and obtaining a plurality of key-press signals from the protection device 4 .

In this preferred embodiment, both the first wireless transmission module 46 and the second wireless transmission module 51 are Bluetooth (Blue Tooth) transmission modules, and the connecting hole 451 is a mini Universal Serial Bus (Mini Universal Serial Bus, Mini USB) interface , and the display screen 50 is a touch screen. But not limited to this, in another preferred embodiment, the first wireless transmission module and the second wireless transmission module can also use an infrared transmission module or an approach communication (NFC) module, and the connection hole can also use a universal serial number Line bus interface or other communication interface.

Next, the detailed structure of the trigger layer 43 will be described. Please refer to FIG. 5 and FIG. 6 at the same time. FIG. 6 is a schematic cross-sectional side view of the exploded structure in the first preferred embodiment of the protection device with button function of the present invention. The trigger layer 43 includes a contact surface layer 431, a first plastic sheet 432, a conductive circuit layer 433 and a plurality of cured resins 434, the contact surface layer 431 is exposed on the inner surface 404 of the protection device 4, and the contact surface layer 431 has a plurality of contact areas 4311 , each contact area 4311 is located above a corresponding first contact 421 . The first plastic sheet 432 is arranged on the lower surface 4312 of the contact surface layer 431, and the conductive circuit layer 433 is arranged on the lower surface 4321 of the first plastic sheet 432, and the conductive circuit layer 433 has a plurality of second contacts 4331 (in order to maintain the The surface is clearly visible, only three are shown in FIG. 5 ), and each second contact 4331 corresponds to a contact area 4311 . A plurality of cured resins 434 are disposed between the first plastic sheet 432 and the printed circuit board 42, and each cured resin 434 is located between every two second contacts 4331 and adjacent to the corresponding second contacts 4331 to separate the second contacts 4331. The first contact 421 and the second contact 4331 are used to avoid false contact of the first contact 421 and the second contact 4331 when the contact area 4311 is not pressed. The first contact 421 , the cured resin 434 and the second contact 4331 can generate corresponding key signals in response to the user's touch pressure. In short, in the protection device 4 with button function of the present invention, the upper contact, isolation layer and lower contact of the existing membrane switch circuit are replaced by the first contact 421, the cured resin 434 and the second contact 4331, and multiple contacts The area 4311 replaces the key caps, scissor-type connecting elements and elastic elements of the existing external keyboard device.

In addition, the protection device 4 with button function of the present invention further includes a second plastic sheet 48 located between the contact surface 431 and the first plastic sheet 432 for smoothing the contact surface 431 . In this preferred embodiment, the contact surface layer 431 is made of synthetic leather with a thickness of 0.4 to 0.6 mm, and the contact surface layer 431 and the first plastic sheet 432 are bonded by an adhesive 49, wherein the conductive circuit layer 433 It is disposed on the lower surface 4321 of the first plastic sheet 432 by a printing technique. The printed circuit board 42 and the base 40 are also bonded by an adhesive 49 , and the plurality of first contacts 421 are formed by a plurality of copper foils distributed on the upper surface 422 of the printed circuit board 42 . Similarly, the second plastic sheet 48 is bonded to the contact surface layer 431 by the adhesive 49 , and the second plastic sheet 48 is also bonded to the first plastic sheet 432 by the adhesive 49 . The plurality of cured resins 434 are attached to the lower surface 4321 of the first plastic sheet 432 through a curing technique, and the cured resins 434 are commonly known as UV glue.

Next, the detailed structure of the base 40 will be described. Please continue to refer to FIG. 5 and FIG. 6 , the base 40 includes a support plate 401 , a first protection plate 402 and a third plastic sheet 403 . The support plate 401 is disposed under the printed circuit board 42 for supporting the printed circuit board 42 to prevent the printed circuit board 42 from being damaged. The first protection plate 402 is located below the support plate 401 and exposed on an outer surface 405 of the protection device 4 , and is used for carrying and protecting the trigger layer 43 and the printed circuit board 42 . The third plastic sheet 403 is located between the first protection board 402 and the support board 401 to make the first protection board 402 flat. In this preferred embodiment, the first protective plate 402 is made of synthetic leather with a thickness of 0.4 to 0.6 mm, and the first protective plate 402 and the third plastic sheet 403 are bonded by an adhesive 49, and The support plate 401 and the third plastic sheet 403 are also bonded by an adhesive 49 .

Regarding the structure of the upper cover 41, please refer to FIG. 4 and FIG. A protective plate 402 is used to carry the tablet computer 5 thereon, and can be turned over relative to the first protective plate 402 to cover the trigger layer 43 . The folding structure 412 is disposed on the second protection board 411 , and is used to fold the second protection board 411 to change the shape of the upper cover 41 so that the upper cover 41 can support the tablet computer 5 thereon. A plurality of fixing elements 413 are disposed on the second protection board 411 and exposed outside the second protection board 411 for fixing the tablet computer 5 on the upper cover 41 .

In this preferred embodiment, the second protective plate 411 is made of synthetic leather with a thickness of 0.4 to 0.6 mm, and is integrally formed with the first protective plate 402. The folding structure 412 is formed by two metal sheets and Composed of a rotating shaft element, it uses the swing of the two metal sheets relative to the rotating shaft element to change the shape of the upper cover 41, and the fixing element 413 is a snap-fit structure. But not limited to this, in another preferred embodiment, the first protective plate and the second protective plate can also adopt a non-integral structure, and the folded structure can also be made of non-metallic materials, and fixed The element can also adopt other fixing structures to achieve the effect of fixing.

Next, the operation situation of the user operating the tablet computer 5 by using the protection device 4 with key function will be described. Please refer to FIG. 6 and FIG. 7 at the same time. Before operating the tablet computer 5, the tablet computer 5 must be fixed on the upper cover 41 by a plurality of fixing elements 413. After the tablet computer 5 is fixed on the upper cover 41, the user The upper cover 41 is folded, and the folding structure 412 is moved in response to the folding action. At this time, the upper cover 41 is deformed so that the protection device 4 with button function presents an operating state as shown in FIG. 7 . The operation state of the protection device 4 with key function is similar to that of a notebook computer. Therefore, the user can press the multiple contact areas 4311 on the trigger layer 43 to generate a key signal by adopting a familiar computer operation method.

When the user touches any contact area 4311 , since the contact surface layer 431 is made of synthetic leather, the pressed contact area 4311 is slightly deformed according to the user's touch pressure. The first plastic sheet 432 below the contact surface layer 431 also bulges toward the base 40 (that is, below), so that the second contact 4331 corresponding to the pressed contact area 4311 extends into the two adjacent cured resins 434 between, and contact with the corresponding first contact 421, at this time, the first contact 421 and the second contact 4331 conduct to generate a corresponding key signal, and the key signal is output to the tablet through the first wireless transmission module 46 The second wireless transmission module 51 of the computer 5 enables the tablet computer 5 to execute a key command corresponding to the key signal. When the user no longer touches the contact area 4311 , the contact area 4311 protruding downward will return to its original shape due to the shape recovery characteristic of the synthetic leather.

In addition, when the user does not need to operate the tablet computer 5, he only needs to turn over the top cover 41, so that the top cover 41 and the tablet computer 5 fixed on the top cover 41 cover an upper surface of the contact surface layer 431 (that is, the protective device 4 inner surface 404 ), so that the protective device 4 with key function is in the stored state as shown in FIG. 8 , so as to be convenient for the user to hold and carry.

There are two things that need special explanation. First, in the protection device 4 with key function, in the trigger layer 43, the thickness of the contact surface layer 431 is about 0.4 to 0.6 millimeters, and the thickness of the first plastic sheet 432 plus the thickness of the conductive circuit layer 433 The thickness is about 0.15 mm, the thickness of the second plastic sheet 48 is about 0.1 mm, the thickness of the cured resin 434 is about 0.2 mm, and the thickness of the printed circuit board 42 is about 0.5 mm. In the base 40, the supporting plate 401 has a thickness of about 0.5 mm, the first protective plate 402 has a thickness of about 0.4 to 0.6 mm, and the third plastic sheet 403 has a thickness of about 0.1 mm. In addition, the thickness of the adhesive 49 is between 0.025 mm and 0.05 mm. Therefore, it can be seen that the total thickness of the protection device 4 with key function is about 3.2 millimeters. Compared with the total thickness of the existing external keyboard device 3 of 4 to 6 millimeters, the total thickness of the protection device 4 with key function of the present invention is relatively small. Small, and its overall weight is also light.

Second, in this preferred embodiment, in order to maintain the flatness of the contact surface layer 431, a second plastic sheet 48 is arranged between the contact surface layer 431 and the first plastic sheet 432. Similarly, in order to maintain the flatness of the first protective plate 402 , a third plastic sheet 403 is disposed between the first protective plate 402 and the support plate 401 . In another preferred embodiment, the second plastic sheet and the third plastic sheet may not be provided. Although the contact surface layer and the first protective plate will be slightly uneven, the total thickness of the protective device with button function of the present invention can be further increased. Shrunk and thinner.

In addition, the present invention further provides a second preferred embodiment. Please refer to FIG. 9 and FIG. 10 at the same time. FIG. 9 is a schematic structural diagram of the protection device with key function of the present invention in the second preferred embodiment in an operating state, and FIG. 10 is a protection device with key function of the present invention in the second preferred embodiment. Schematic diagram of the cross-sectional side view of the exploded structure in the preferred embodiment. The protection device 6 with button function includes a base 60, an upper cover 61, a printed circuit board 62 with a plurality of first contacts 621, a trigger layer 63, a rechargeable battery (not shown in the figure), a charging Module 65, a first wireless transmission module (not shown in the figure), a protective cover 66 and a connection line 67, the base 60 includes a support plate 601, a first protective plate 602 and a second plastic sheet 603, and The upper cover 61 includes a second protective plate 611 , a folding structure (not shown in the figure) and a plurality of fixing elements 613 . The structure and function of the protection device 6 with key function in this preferred embodiment are substantially the same as those of the protection device 4 with key function in the first preferred embodiment, and the similarities will not be repeated here. The difference between this preferred embodiment and the first preferred embodiment lies in the structure of the trigger layer 63 .

Next, the structure of the trigger layer 63 will be described. In Fig. 10, the trigger layer 63 includes a contact surface layer 631, a conductive circuit layer 632 and a first plastic sheet 633, the contact surface layer 631 is exposed on an inner surface 604 of the protection device 6, and the contact surface layer 631 has a plurality of contact areas 6311 , each contact area 6311 corresponds to a first contact 621 and is located above the corresponding first contact 621 . The conductive circuit layer 632 is disposed on the lower surface 6312 of the contact surface layer 631 , the conductive circuit layer 632 has a plurality of second contacts 6321 , and each second contact 6321 corresponds to a contact area 6311 and a first contact 621 . The first plastic sheet 633 is disposed between the contact surface layer 631 and the printed circuit board 62 and adjacent to the plurality of second contacts 6321. The first plastic sheet 633 has a plurality of openings 6331, and each opening 6331 corresponds to a first contact. A contact 621 , the first plastic sheet 633 is used to separate the plurality of first contacts 621 and the plurality of second contacts 6321 . In this preferred embodiment, the contact surface layer 631 is made of synthetic leather with a thickness of 0.4 to 0.6 mm, and the conductive circuit layer 632 is disposed on the lower surface 6312 of the contact surface layer 631 by a printing technique. Wherein, the contact surface layer 631 and the first plastic sheet 633 are bonded by an adhesive 68 .

Next, a brief description will be given of how the user operates the tablet computer 5 using the protection device 6 with key functions. When the user touches any contact area 6311, since the contact surface layer 631 is made of synthetic leather, the pressed contact area 6311 is slightly deformed according to the user's touch pressure, that is, the pressed contact area 6311 protrudes toward the base 60 (that is, below), so that the second contact 6321 corresponding to the pressed contact area 6311 extends into the corresponding opening 6331 and contacts the corresponding first contact 621. At this time , the first contact 621 and the second contact 6321 conduct to generate a corresponding key signal, and the key signal is transmitted to the tablet computer 5 through the first wireless transmission module. And when the user no longer touches the contact area 6311, the contact area 6311 raised downward will return to its original shape due to the shape recovery characteristic of the synthetic leather.

There are two things that need to be specially explained. First, unlike the aforementioned first preferred embodiment, the trigger layer 63 in this preferred embodiment is only provided with a first plastic sheet 633 and is not provided with cured resin, so it can The total thickness of the protective device 6 with button function is further reduced by reducing the amount of the adhesive 68 , and the total thickness is about 2.7 mm. In addition, in this preferred embodiment, the wireless transmission module is not used to transmit the button signal, so as to reduce the power consumption of the rechargeable battery and reduce the total weight of the protection device with button function. Second, FIG. 9 shows that one end of the connecting wire 67 is plugged into the connecting hole 651 of the charging module 65 , and the other end of the connecting wire 67 is plugged into the tablet computer 5 . When the user does not carry a power supply (such as a mobile power supply), the protection device 6 and the tablet computer 5 can be connected through the connecting wire 67 , so that the tablet computer 5 outputs power to the protection device 6 .

According to the above-mentioned preferred embodiments, the protection device with button function of the present invention is formed by laminating a multi-layer structure, and a plurality of first contacts are arranged on the printed circuit board, and a plurality of second contacts are arranged on the trigger layer. , and a plurality of cured resins or first plastic sheets are arranged between the trigger layer and the printed circuit board to separate a plurality of first contacts and a plurality of second contacts, so that the trigger layer and the printed circuit board can jointly generate a plurality of button signals, and also That is to say, the protective device has a button function. That is to say, the protection device with key function of the present invention utilizes trigger layer, printed circuit board and multiple cured resin or first plastic sheet to replace the key cap, scissors type connecting element, elastic element, supporting plate and the existing external keyboard device. For the membrane switch circuit, compared with the existing external keyboard device, the protection device with key function of the present invention has thinner thickness and lighter weight, so that it is convenient for users to operate and carry.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the claims of the present invention. Therefore, all other equivalent changes or modifications that do not deviate from the spirit disclosed in the present invention should be included in this disclosure. within the scope of the claimed invention.

Claims (11)

1. A protective device with button function, used to connect a tablet computer and store the tablet computer therein, it is characterized in that, the protective device with button function includes: base; a printed circuit board located above the base, and the printed circuit board has a plurality of first contacts disposed on an upper surface of the printed circuit board; and The trigger layer is located above the printed circuit board and exposed on an inner surface of the protection device, and is used to generate a plurality of key signals together with the plurality of first contacts of the printed circuit board. The trigger layer includes: a contact surface layer exposed on the inner surface of the protective device, and the contact surface layer has a plurality of contact areas, each of the contact areas is located above a corresponding one of the first contacts; a first plastic sheet disposed on a lower surface of the contact surface; a conductive circuit layer disposed on the lower surface of the first plastic sheet, the conductive circuit layer has a plurality of second contacts, each of the second contacts corresponds to a contact area; and A plurality of cured resins are disposed between the first plastic sheet and the printed circuit board, and each cured resin is located between every two second contacts to separate the plurality of first contacts and the plurality of second contacts; Wherein when the contact area is pressed, the second contact point corresponding to the contact area extends between the adjacent two cured resin layers and contacts with the corresponding first contact point, so as to generate the corresponding key signal to The tablet. 2. The protection device with button function as claimed in claim 1, wherein the contact surface layer is made of synthetic leather with a thickness of 0.4 to 0.6 mm, and the contact surface layer and the first plastic sheet are borrowed bonded by an adhesive, the printed circuit board and the base are bonded by an adhesive, and the plurality of first contacts are formed by a plurality of copper foils distributed on the upper surface of the printed circuit board, and The plurality of cured resins are attached to the lower surface of the first plastic sheet through a curing technique. 3. The protection device with button function according to claim 1, characterized in that, the protection device further comprises a second plastic sheet, the second plastic sheet is located between the contact surface layer and the first plastic sheet for The contact surface layer is flattened; wherein the second plastic sheet is bonded to the contact surface layer by an adhesive, and the second plastic sheet is also bonded to the first plastic sheet by an adhesive. 4. The protective device with button function according to claim 1, characterized in that, the base comprises: a support plate, arranged below the printed circuit board, for supporting the printed circuit board; a first protection plate, located below the support plate and exposed on an outer surface of the protection device, is used to carry the trigger layer and the printed circuit board and protect the trigger layer and the printed circuit board; and The third plastic sheet is located between the first protection board and the supporting board, and is used for flattening the first protection board. 5. The protective device with button function according to claim 4, characterized in that, the first protective plate is made of synthetic leather with a thickness of 0.4 to 0.6 mm, and the first protective plate and the third protective plate are The plastic sheet is bonded by an adhesive, and the support plate and the third plastic sheet are bonded by an adhesive. 6. The protective device with button function as claimed in claim 1, characterized in that, the protective device further comprises: The upper cover, connected to the base, is used to turn over the base to cover the trigger layer, and the upper cover includes: The second protective plate is connected to a first protective plate of the base, used to carry the tablet computer thereon, and can be turned over relative to the first protective plate to cover the trigger layer; a folding structure, disposed on the second protective plate, is used to fold the second protective plate to support the tablet computer; and A plurality of fixing elements are arranged on the second protective plate and exposed outside the second protective plate, for fixing the tablet computer on the upper cover; a rechargeable battery disposed on the base and connected to the printed circuit board for providing an electric power to the printed circuit board; a charging module, arranged on the base and connected to the rechargeable battery, for charging the rechargeable battery; and The wireless transmission module is arranged on the base and connected to the rechargeable battery, and is used for transmitting the plurality of button signals to the tablet computer through a wireless transmission technology. 7. A protection device with key function, used to connect to a tablet computer and accommodate the tablet computer therein, characterized in that, the protection device with key function includes: base; a printed circuit board located above the base, and the printed circuit board has a plurality of first contacts disposed on an upper surface of the printed circuit board; and The trigger layer is located above the printed circuit board and exposed on an inner surface of the protection device, and is used to generate a plurality of key signals together with the plurality of first contacts of the printed circuit board. The trigger layer includes: a contact surface layer exposed on the inner surface of the protective device, and the contact surface layer has a plurality of contact areas, each of the contact areas is located above a corresponding one of the first contacts; a conductive circuit layer disposed on the lower surface of the contact surface layer, the conductive circuit layer has a plurality of second contacts, each of the second contacts corresponds to a contact area; and The first plastic sheet is disposed between the contact surface layer and the printed circuit board and adjacent to the plurality of second contacts, the first plastic sheet has a plurality of openings, and each opening corresponds to one of the first openings A contact, the first plastic sheet is used to separate the plurality of first contacts and the plurality of second contacts; wherein when the contact area is pressed, the second contact corresponding to the contact area extends into the corresponding The hole is opened to contact with the corresponding first contact, so as to generate the corresponding key signal to the tablet computer. 8. The protective device with button function as claimed in claim 7, characterized in that, the contact surface layer is made of synthetic leather with a thickness of 0.4 to 0.6 mm, and the contact surface layer and the first plastic sheet are borrowed bonded by an adhesive, the printed circuit board and the base are bonded by an adhesive, and the plurality of first contacts are formed by a plurality of copper foils distributed on the upper surface of the printed circuit board, and The first plastic sheet and the printed circuit board are bonded by adhesive. 9. The protective device with key function according to claim 7, characterized in that the base comprises: a support plate, arranged below the printed circuit board, for supporting the printed circuit board; a first protection plate, located below the support plate and exposed on an outer surface of the protection device, is used to carry the trigger layer and the printed circuit board and protect the trigger layer and the printed circuit board; and The second plastic sheet is located between the first protection board and the supporting board, and is used for flattening the first protection board. 10. The protective device with button function according to claim 9, characterized in that, the first protective plate is made of synthetic leather with a thickness of 0.4 to 0.6 mm, and the first protective plate and the second protective plate are The plastic sheet is bonded by an adhesive, and the support plate and the second plastic sheet are bonded by an adhesive. 11. The protection device with button function according to claim 7, characterized in that, the protection device further comprises: The upper cover, connected to the base, is used to turn over the base to cover the trigger layer, and the upper cover includes: The second protective plate is connected to a first protective plate of the base, used to carry the tablet computer thereon, and can be turned over relative to the first protective plate to cover the trigger layer; a folding structure, disposed on the second protective plate, is used to fold the second protective plate to support the tablet computer; and A plurality of fixing elements are arranged on the second protective plate and exposed outside the second protective plate, for fixing the tablet computer on the upper cover; a rechargeable battery disposed on the base and connected to the printed circuit board for providing an electric power to the printed circuit board; a charging module, arranged on the base and connected to the rechargeable battery, for charging the rechargeable battery; and The wireless transmission module is arranged on the base and connected to the rechargeable battery, and is used for transmitting the plurality of button signals to the tablet computer through a wireless transmission technology.