TWM473551U - Keyboard device - Google Patents

Description

Keyboard device

The present invention relates to a keyboard device, and more particularly to a thin keyboard device that prevents liquid and dust from penetrating into the interior of the keyboard.

With the rapid development of information technology, various electronic products such as notebook computers and desktop computers have already played an indispensable role in the life, work and even entertainment of modern people, and the keyboard is important for operating such electronic products. One of the media.

The conventional keyboard mainly uses a key cap for pressing each button to input a signal, and a resilient support unit is disposed under each of the key caps, so that the key cap can be rebounded to the original position after being pressed for the next time. Press. At present, the common types of keyboards on the market are roughly classified into mechanical keyboards and membrane keyboards. The membrane keyboard mainly uses scissors as elastic support units to support the keycaps, which not only shortens the key stroke but also reduces the number of keys. The height of the keyboard makes the membrane keyboard more and more popular with consumers.

However, the above-mentioned scissor structure is complicated in manufacturing and assembly, so that the thickness of the keyboard still cannot meet the demand of being light and thin and convenient for carrying. Also, adjacent to each other on the keyboard There is a certain gap between the key caps, which makes it easy for tea, beverages and the like to inadvertently drip into the interior of the keyboard, and dust and debris in the air can easily accumulate between them, not only causing the user to clean up. Difficulties, in severe cases, can cause the keyboard to be inoperable and damaged.

Accordingly, it is an object of the present invention to provide a keyboard device that prevents liquid and dust from penetrating into the interior of the keyboard and damaging the circuit.

Another object of the present invention is to provide a keyboard device that is simple in structure and thin in overall height.

Therefore, the keyboard device of the present invention comprises a base, a circuit board, a key press mold, and a plurality of elastic members.

The board includes a plurality of switches.

The key film is coupled to the periphery of the base and forms a sealed space for the circuit board package, and includes a film body, and a plurality of columns extending integrally from the film body in the sealed space, the columns respectively The periphery of the switches is spaced around and defines a plurality of press regions corresponding to each of the switches.

The elastic members are respectively disposed between the film body and the switches corresponding to the each pressing region. When any pressing area of the key film is touched, the elastic member corresponding to the lower side of the pressing area is deformed and the corresponding switch is turned on, and a restoring force is generated to return the pressing area to the original position.

The utility model has the advantages that the circuit board is sealed by the integral molding key mold and the base, so that the keyboard device can have good waterproof and dustproof effects. In addition, the use is located at each press The elastic members under the area are used to turn on the corresponding circuit board switches, and at the same time, the resilience after pressing is provided with the cylinder around the switch of the circuit board, which can effectively shorten the pressing key stroke, reduce the thickness of the keyboard, and can prevent The user accidentally touches the adjacent elastic member.

1‧‧‧Base

2‧‧‧ boards

21‧‧‧ switch

211‧‧‧Upper conductor

212‧‧‧lower conductor

22‧‧‧Upper film

23‧‧‧Under film

24‧‧‧Isolation

3‧‧‧ key film

31‧‧‧ membrane body

32‧‧‧Cylinder

33‧‧‧ Pressing area

34‧‧‧Touching block

35‧‧‧ wall

4‧‧‧Confined space

5‧‧‧Flexible parts

51‧‧‧Perforation

6‧‧‧Support board

61‧‧‧Perforation

7‧‧‧Insulation film

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is an exploded perspective view showing a first preferred embodiment of the present invention; FIG. A partial cross-sectional side view illustrating an initial state of the first preferred embodiment; and FIG. 3 is a partial cross-sectional side view illustrating a corresponding pressing region of the first preferred embodiment when the pressing region is touched The lower elastic member is deformed and the corresponding switch is turned on; FIG. 4 is a partial cross-sectional side view showing a second preferred embodiment of the keyboard device of the present invention; and FIG. 5 is a partial bottom view showing the second comparison a detailed construction of a one-button stamper of a preferred embodiment; and

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1 and FIG. 2, a first preferred embodiment of the keyboard device of the present invention comprises a base 1, a circuit board 2, a key stamper 3, and a support plate. 6. An insulating film 7, and a plurality of elastic members 5.

The circuit board 2 includes a plurality of switches 21 (only 2 in FIG. 2) The switch 21 is taken as an illustration). The circuit board 2 further includes an upper film 22, a lower film 23, and an isolation layer 24 interposed between the upper film 22 and the lower film 23.

Each switch 21 has a bottom surface disposed on the upper film 22 The upper conductor 211 and a lower conductor 212 disposed on the top surface of the lower film 23 and longitudinally aligned with the upper conductor 211. The upper conductor 211 of each of the switches 21 is electrically connected to the corresponding lower conductor 212 in contact with the corresponding deformation of the upper film 22, respectively. In addition, those skilled in the art can also understand that the switch 21 in the first preferred embodiment can also be designed as other trigger switches or inductive switches, such as thin film capacitive switches.

The key film 3 is connected to the periphery of the base 1 and forms a The circuit board 2 encloses the sealed space 4 therein, thereby preventing dust and liquid from penetrating into the circuit board 2. Preferably, the circuit board 2 can be further bonded to the base 1 using an adhesive such as a backing, thereby fixing the circuit board 2 and avoiding displacement. The key film 3 includes a film body 31, and a plurality of pillars 32 integrally extending from the film body 31 to the sealed space 4, and the pillars 32 are spaced around the periphery of the switches 21 and the film body 31 defines a plurality of pressing regions 33 respectively located above each switch 21. In the first preferred embodiment, each of the pressing regions 33 of the key film 3 is printed with a corresponding signal mark, thereby replacing the key cap on the conventional keyboard device, thereby achieving the purpose of slimming the keyboard. Preferably, the key film 3 is made of an elastic material. Suitable elastic materials include, but are not limited to: plastic, rubber, enamel Glue, and thermoplastic polyurethane (TPU).

The support plate 6 and the insulating film 7 are respectively disposed on the sealing film In the space 4, the insulating film 6 is located between the circuit board 2 and the key film 3, and is composed of a mylar film, but can also be made of other insulating plastic materials. The support plate 6 is located between the key film 3 and the insulating film 7 for supporting the key film 3 and the insulating film 7. The support plate 6 may be integrally formed of the same material as the insulating film 7, but may be a separate component made of other materials having higher hardness and providing sufficient supporting force.

The elastic members 5 are respectively corresponding to the pressing regions 33 Placed between the membrane body 31 and the switches 21. In the first preferred embodiment, the elastic members 5 are respectively arc-shaped elastic pieces and are fixed to the lower surface of the insulating film 7. The pillars 32 of the key stamper 3 are respectively connected to the support plate 6 and the corresponding through holes 61 and 71 of the insulating film 7, and are connected to the circuit board 2, so that the heights of the pillars 32 are slightly equal. The stacking height of the support plate 6, the insulating film 7, and the elastic members 5. In this way, the support plate 6 and the insulating film 7 can be respectively fixed in the sealed space 4, and each pressing portion 33 of the key film 3 can be clearly positioned on the corresponding switch of the circuit board 2. 21 and the elastic member 5 prevent the user from opening the wrong switch 21 by accidentally touching the adjacent pressing portion 33.

Referring to FIG. 3, when the user applies force to touch the key film 3 When the pressing area 33 is pressed, the cylinder 32 around the correspondingly disposed switch 21 is deformed by force, so that the elastic body 5 corresponding to the pressing portion 33 is deformed by the mold body 31, and the elastic member 5 is touched. Press the board 2 The upper film 22 causes the upper film 22 to flex and deform, and moves the corresponding upper conductor 211 of the switch 21 to contact the lower conductor 212 of the switch 21 to turn on the circuit of the switch 21, so that the circuit board 2 generates a Button signal.

When the user stops touching the pressing zone 33, the deformation The cylinder 32 and the elastic member 5 generate a restoring force to push the pressing portion 33 back to the original position (Fig. 2) for the next pressing. In particular, when the user does not press against any of the pressing zones 33, but rather a gap between, for example, two pressing zones (i.e., directly above the cylinders 32), the cylinders 32 create a resistance. Moreover, the user is not easy to apply pressure and know the pressing error to avoid outputting an error signal due to accidental contact with the adjacent elastic member 5. Based on the above, the pillars 32 can simultaneously provide a positioning function and an elastic restoring force, and provide a short keystroke of any pressing zone 33 of the keying film 3 with the elastic members 5, so that the user can touch the pressure. The new keyboard device maintains a clear sense of compression.

In the first preferred embodiment, the switches 21 are The upper conductors 211 are respectively opened in direct contact with the corresponding lower conductors 212, but the switches 21 can also be turned on by indirect contact. For example, the upper conductor 211 of the switches and the corresponding lower conductor 212 are spaced apart from each other on the top surface of the lower film 23, and the elastic member 5 is a metal dome by the metal. The film shrapnel electrically connects the upper conductor 211 and the lower conductor 212 of the switch 21 as a conductor to indirectly conduct a circuit (not shown).

Referring to FIG. 4 and FIG. 5, a second comparison of the keyboard device of the present invention The preferred embodiment is substantially the same as the first preferred embodiment, and the difference lies in: The keying film 3 further includes a plurality of contact blocks 34 respectively corresponding to the respective pressing regions 33 and extending integrally from the film body 31, and has a good touch feeling, which allows the user to actually feel whether or not the pressing is actually performed. , reducing the accidental touch on the adjacent pressing area 33 and outputting an error signal. In the second preferred embodiment, each of the contact blocks 34 is divided by the columns 32, that is, corresponding to the switch 21 and the elastic member disposed under each of the contact blocks 34. Four cylinders 32 are symmetrically distributed at the four peripheral positions of 5. Preferably, in order to further provide a better fixing effect, the keying film 3 further includes a surrounding wall 35 extending downward from the periphery of the film body 31 and coupled to the circuit board 2.

In summary, the keyboard device of the present invention is pressed by the key film 3 The base 1 is coupled to seal the circuit board 2 inside, and the waterproof and dustproof effects can be achieved. In addition, under each pressing area 33 of the keying die 3, an elastic member 5 is disposed corresponding to the switch 21 of the corresponding circuit board 2, which can effectively shorten the keystroke and thin the keyboard thickness to make the user easier. Carrying and simultaneously fixing the internal structure of the keyboard with the column 33 surrounding the switch 21 of the circuit board 2 can effectively distinguish the pressing areas 33 without easily touching the adjacent elastic members 5, so that the present invention can be achieved. purpose.

However, the above is only the preferred embodiment of the present invention. The scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made in accordance with the scope of the present patent application and the contents of the patent specification are still within the scope of the present patent.

1‧‧‧Base

2‧‧‧ boards

21‧‧‧ switch

211‧‧‧Upper conductor

212‧‧‧lower conductor

22‧‧‧Upper film

23‧‧‧Under film

24‧‧‧Isolation

3‧‧‧ key film

31‧‧‧ membrane body

32‧‧‧Cylinder

33‧‧‧ Pressing area

4‧‧‧Confined space

5‧‧‧Flexible parts

6‧‧‧Support board

7‧‧‧Insulation film

Claims (5)

A keyboard device comprising: a base; a circuit board comprising a plurality of switches; a key press film coupled to the periphery of the base and forming a sealed space for the circuit board package, the key press film comprising a film body, And a plurality of pillars integrally extending from the membrane body to the sealed space, the pillars respectively surrounding the circumferences of the switches and defining a plurality of pressing regions respectively corresponding to the respective switches; and plural The elastic members are respectively disposed between the film body and the switches corresponding to the pressing regions, and when any one of the pressing regions of the key film is touched, the elastic members corresponding to the pressing portions are deformed and The corresponding switch is turned on, and a restoring force is generated to return the pressing area to the original position. The keyboard device of claim 1, wherein the key film further comprises a plurality of contact blocks respectively corresponding to the respective pressing regions and extending integrally upward from the film body. The keyboard device of claim 2, further comprising a support plate disposed in the sealed space between the circuit board and the key film, and an insulating film. The keyboard device of claim 3, wherein the elastic members are respectively arc-shaped elastic pieces. The keyboard device of claim 1, wherein the key film is made of an elastic material.