TWM550459U - Key with keystroke assisting structure - Google Patents

Description

Button with keystroke assist structure

The present invention relates to a button, and more particularly to a button having a keystroke assist structure.

Referring to FIG. 1 and FIG. 2, a conventional button 10 has a bottom plate 11, a thin film circuit board 12 disposed on the bottom plate 11, a key cap 13, and a lifting support mounted between the key cap 13 and the bottom plate 11. a mechanism 14, and an elastic member 15 mounted between the keycap 13 and the thin film circuit board 12 and passing through the lifting support mechanism 14, the elastic member 15 having a centrally located actuation post 151 when the key is pressed The cap 13 compresses the elastic member 15 while the touch column 151 moves toward the bottom end and presses against a switch 121 of the film circuit board 12 to output a signal. When the key cap 13 is released, the elastic member 15 is The restoring force causes the keycap 13 to rise and reset, and the touch column 151 is disengaged from the switch 121. Although the button 10 has the above-mentioned use functions, the following problems still exist:

1. The button 10 is pressed against the switch 121 of the thin film circuit board 12 by the touch column 151 of the elastic member 15 to output a signal, and the pressing time is not long enough, causing the switch 121 to bounce and fail to output a signal. .

2. For the input key (Enter), the blank key (Space), and other long-length multiple keys, the position of the pressing member is often off-center, causing the touch column 151 of the elastic member 15 to be skewed, and cannot be accurately pressed against The switch 121 of the thin film circuit board 12 causes a decrease in input sensitivity.

Therefore, an object of the present invention is to provide a key having a keystroke assisting structure that can ensure that the switch can be actuated in response to a user pressing a keycap, thereby improving input sensitivity.

Therefore, the present invention has a button with an auxiliary keystroke structure. The embodiment includes a bottom plate, a film circuit board, a keycap, a lifting support mechanism, an elastic return member and an elastic touch member. The thin film circuit board is disposed on the bottom plate and has a switch; the key cap includes a bottom surface of the thin film circuit board, and a pressing position away from the thin film circuit board and a pressing near the thin film circuit board Moving between positions; the lifting support mechanism is installed between the bottom plate and the key cap; the elastic returning member is installed between the thin film circuit board and the key cap, so that the key cap has a tendency to move toward the rising position The elastic actuator includes a connecting block extending from a bottom surface of the keycap, a cantilever bent from the connecting block and spaced apart from the bottom surface, and a contact block formed on the cantilever for pressing against the switch.

The function of the present invention is that during the resetting of the keycap from the pressing position to the rising position, the switch can be lowered by accumulating the cantilever of the elastic actuator to continuously press the trigger block against the force of the switch. The probability of bouncing is generated, and the elastic actuator can also assist in supporting the keycap to prevent the keycap from being skewed during pressing, so as to ensure that the switch can be operated according to the user pressing the keycap, thereby improving input sensitivity. .

The present invention will be described in detail below with reference to the accompanying drawings and embodiments. Before the present invention is described in detail, the relative positional terms used in the following descriptions, such as "top" and "bottom", are used in the drawings. The orientation and normal use orientation are the benchmarks.

Referring to FIG. 3 to FIG. 5, the present invention has a button with an auxiliary keystroke structure. The embodiment includes a bottom plate 20, a film circuit board 30, a keycap 40, a lifting support mechanism 50, an elastic return member 60, and an elastic touch. Item 70.

The thin film circuit board 30 is disposed on the bottom plate 20 and has a switch 31.

The keycap 40 includes a bottom surface 41 of the thin film circuit board 30 and is movable between a raised position away from the thin film circuit board 30 (see FIG. 5) and a pressed position adjacent to the thin film circuit board 30 ( See Figure 6).

The lifting support mechanism 50 is mounted between the bottom plate 20 and the keycap 40, and includes a first bracket 51 and a second bracket 52 that are pivotally connected to each other.

The elastic returning member 60 is mounted between the thin film circuit board 30 and the keycap 40, so that the keycap 40 has a tendency to move toward the raised position.

The structure and operation of the bottom plate 20, the thin film circuit board 30, the keycap 40, the lifting support mechanism 50, and the elastic returning member 60 are easily understood by those of ordinary skill in the art, and are not The characteristics of the novel are located, so the detailed structure and operation thereof will not be described herein.

The elastic actuator 70 includes a connecting block 71 extending from the bottom surface 41 of the keycap 40, a cantilever 72 bent from the connecting block 71 and spaced apart from the bottom surface 41, and a cantilever 72 for pressing The trigger block 73 of the switch 31 is abutted.

The cantilever 72 has a flexure 721 adjacent to the connecting block 71 and a free portion 722 away from the connecting block 71. When the keycap 40 is in the raised position, the free portion 722 and the bottom surface 41 of the keycap 40 The distance between the flexure 721 and the bottom surface 41 of the keycap 40 is greater than the distance between the cantilever 72 and the bottom surface 41.

The touch block 73 is located at the free portion 722 of the cantilever 72 and has a circular arc surface 731 facing the switch 31.

Referring to FIG. 5, when the keycap 40 is in the raised position, the touch block 73 and the switch 31 are not in contact with each other, and the distance between the free portion 722 of the cantilever 72 and the bottom surface 41 of the keycap 40 is greater than the deflection. The distance between the portion 721 and the bottom surface 41, referring to FIG. 6 and FIG. 4, when the user applies the key pressure of the key cap 40, the key cap 40 is located at the pressing position because the key cap 40 and the thin film circuit board The distance between the 30 is reduced, so that the elastic returning member 50 is compressed to have a main restoring force, and the arcuate surface 731 of the engaging block 73 of the elastic actuator 70 is pressed against the switch 31 of the thin film circuit board 30. A signal is outputted, and the distance between the free portion 722 of the cantilever 72 and the bottom surface 41 of the keycap 40 is also reduced, that is, the cantilever 72 is deflected by the flexure 721 as a fulcrum, so that the cantilever 72 has an auxiliary recovery force.

Referring to FIG. 6, FIG. 5 and FIG. 4, when the user releases the keycap 40 to release the downward pressure, the elastic returning member 50 will return to the original shape, and the keycap 40 and the lifting support mechanism are pushed by the main restoring force. 50 is returned to the raised position, and it is important that the trigger block 73 of the resilient contact member 70 can still be pressed against the switch 31 during the resetting of the keycap 40 from the pressed position to the raised position. The time of the switch 31 can be increased, and the probability of the bounce of the switch 31 can be reduced. In addition, the present invention can generate double thrust by the main restoring force of the elastic return member 60 and the auxiliary restoring force of the cantilever 72. Further, the reset speed of the keycap 40 and the lifting support mechanism 50 can be increased.

It is worth noting that the button with the auxiliary keystroke structure can be a general button or a multiple button. The above is the structure and action description of the general button. Referring to FIG. 4, when the present invention is a multiple button, the multiple button includes The bottom plate 20, the thin film circuit board 30 provided with the two switches 31, the key cap 40, two lifting support mechanisms 50 respectively installed between the keycap 40 and the left and right sides of the bottom plate 20, and mounting The elastic returning member 60 at a position intermediate the thin film circuit board 30 and the keycap 40, and two elastic actuators 70 corresponding to the left and right sides of the bottom surface 41 of the keycap 40 are disposed corresponding to the two switches 31. Since the length of the keycap 40 of the multiple keys is long, and there are two lifting support mechanisms 50, by the elastic actuators 70 assisting in supporting the keycap 40, the keycap 40 can be avoided during the pressing process because The position of the pressing is deviated from the center, so that the switch 31 can be operated in response to the user pressing the keycap 40, and the input sensitivity can be improved.

In summary, the present invention has the above-mentioned effects and advantages, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

20‧‧‧floor

30‧‧‧Film board

31‧‧‧ switch

40‧‧‧Key Cap

41‧‧‧ bottom

50‧‧‧ Lifting support mechanism

51‧‧‧First bracket

52‧‧‧second bracket

60‧‧‧Elastic reset parts

70‧‧‧Elastic touch parts

71‧‧‧Connecting block

72‧‧‧ cantilever

721‧‧‧Flexing Department

722‧‧The Ministry of Freedom

73‧‧‧Touch block

731‧‧‧Arc face

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 of a conventional button; FIG. 2 is a sectional view of the prior art; FIG. FIG. 4 is an exploded perspective view of the button of the auxiliary keystroke structure; FIG. 4 is an exploded perspective view showing the embodiment including a bottom plate, a film circuit board, a keycap, a lifting support mechanism, an elastic returning member, and an elastic Figure 5 is a cross-sectional view taken from line V-V of Figure 3, showing the keycap in a raised position, while a touch block of the resilient contact member is not in contact with a switch of the thin film circuit board And FIG. 6 is a view similar to FIG. 5 showing the keycap in a pressed position while the trigger block is pressed against the state of the switch.

20‧‧‧floor

30‧‧‧Film board

31‧‧‧ switch

40‧‧‧Key Cap

41‧‧‧ bottom

50‧‧‧ Lifting support mechanism

51‧‧‧First bracket

52‧‧‧second bracket

60‧‧‧Elastic reset parts

70‧‧‧Elastic touch parts

71‧‧‧Connecting block

72‧‧‧ cantilever

73‧‧‧Touch block

Claims (3)

A button having a keystroke assisting structure, comprising: a bottom plate; a thin film circuit board disposed on the bottom plate and having a switch; a key cap including a bottom surface of the thin film circuit board and being movable away from The rising position of the thin film circuit board moves between a pressing position adjacent to the thin film circuit board; a lifting support mechanism is installed between the bottom plate and the key cap; and an elastic reset member is mounted on the thin film circuit board Between the key caps, the key cap has a tendency to move toward the raised position; and an elastic touch member includes a connecting block extending from the bottom surface of the key cap, and the connecting block is bent from the connecting block and is opposite to the bottom surface a spaced cantilever, and a contact block formed on the cantilever for pressing against the switch. The button of claim 1, wherein the cantilever of the elastic actuator has a flexure portion adjacent to the connecting block, and a free portion away from the connecting block, when the key cap is located In the raised position, the distance between the free portion and the bottom surface of the keycap is greater than the distance between the flexure and the bottom surface of the keycap. A button having a keystroke assisting structure according to claim 2, wherein the actuating block of the elastic actuating member is located at a free portion of the cantilever and has a circular arc surface facing the switch.