CN104882318A - Button structure - Google Patents

Abstract

The present invention relates to a button structure, which includes a keycap, a balance bar, a bottom plate and a buffer sheet, wherein the keycap has a joint part and a lower surface, the joint part protrudes from the lower surface, and when the keycap is pressed, the keycap will be downward Move to the lowered position; the balance bar is connected to the joint. When the keycap is in the lowered position, the lower end of the joint is lower than the balance bar; the bottom plate is arranged below the keycap, and the bottom plate has a concave space corresponding to the joint; the buffer sheet is arranged on the bottom plate, The buffer sheet covers the recessed space and has a deformable part corresponding to the recessed space. When the keycap moves to a lower position toward the bottom plate, the lower end of the joint part presses against the deformable part, so that the deformable part extends into the recessed space. The present invention uses the cushioning design of the key structure to provide cushioning elasticity during key operation, avoiding or reducing the noise generated by the keycap directly colliding with the bottom plate, and forms a cushioning design through the multi-layer structure of the membrane switch, without increasing the cost of materials. Can effectively achieve the effect of noise reduction.

Description

key structure

technical field

The present invention relates to a key structure, in particular, the present invention relates to a key structure with mute design and a keyboard device with the key structure.

Background technique

The keycaps of multiple keys (such as space (Space) key, carriage return (Enter) key, uppercase and lowercase switching (CapsLock) key, displacement (Shift) key, etc.) A balance bar is provided to improve the structural strength of the keycap. Furthermore, with the setting of the balance bar, even if the user presses the non-central position of the keycap, the multiplier key will not be tilted during the pressing process. The balance bar is generally connected to the bottom of the keycap by engaging with the joint part protruding from the lower surface of the keycap. When the user presses the keycap, along with the downward movement of the keycap, usually the protruding joint portion below the keycap collides with the bottom plate to generate noise, thereby affecting the smoothness and comfort of the operation.

Therefore, how to effectively eliminate the noise generated by the impact of the keycap on the bottom plate is actually one of the main issues in the design of the key structure.

Contents of the invention

One of the objectives of the present invention is to provide a key structure that can effectively eliminate abnormal operating noises.

Another object of the present invention is to provide a button structure with a quiet design, which provides cushioning elasticity when the button is operated, and avoids or reduces the noise generated by direct collision.

Another object of the present invention is to provide a key structure with cushioning design, which uses the multi-layer structure of the membrane switch to form a cushioning design, and effectively achieves the effect of noise reduction without increasing material costs.

In order to achieve the above object, the present invention proposes a button structure, including a keycap, a balance bar, a bottom plate and a buffer sheet. The keycap has a joint portion and a lower surface, and the joint portion protrudes from the lower surface; the balance bar is connected to the joint portion. , and the lower end point of the joint is lower than the connecting portion between the balance bar and the joint; the bottom plate is arranged below the keycap, the bottom plate has a recessed space, and the recessed space corresponds to the joint; the buffer sheet is arranged on the bottom plate , the buffer sheet covers the recessed space and the buffer sheet has a deformable portion corresponding to the recessed space, wherein when the keycap is pressed, the keycap moves toward the bottom plate to a lowered position, and the joint portion The lower end point presses the deformable part, so that the deformable part extends into the recessed space.

As an optional technical solution, the recessed space is formed by perforations or grooves formed on the bottom plate.

As an optional technical solution, the buffer sheet is a membrane switch, the membrane switch has a multi-layer structure, at least one layer of the membrane switch forms at least one membrane opening corresponding to the recessed space, and at least another layer of the membrane switch The at least one film opening is covered to form the deformable part.

As an optional technical solution, the deformable portion includes a film groove, the film groove is composed of the film opening and a part covering the film opening, and the opening of the film groove faces the keycap or the bottom plate.

As an optional technical solution, the deformable portion includes two thin film grooves, and the notches of the two thin film grooves respectively face the keycap and the bottom plate.

As an optional technical solution, the total thickness of the at least another layer covering the at least one membrane opening in the membrane switch is not greater than 0.075mm.

As an optional technical solution, the buffer sheet includes a membrane switch and a membrane, the membrane switch has a through hole, the through hole corresponds to the joint part, and the membrane covers the lower part of the through hole as the deformable part. When the keycap moves toward the bottom plate, the joint part passes through the through hole and presses against the diaphragm toward the recessed space, so that the diaphragm extends into the recessed space; or, the diaphragm covers the through hole and As the deformable portion, when the keycap moves toward the bottom plate, the joint portion presses against the diaphragm toward the recessed space and passes through the through hole, so that the diaphragm extends into the recessed space.

As an optional technical solution, the diaphragm is a polyester sheet or a rubber sheet, and the thickness of the diaphragm is smaller than that of the membrane switch.

As an optional technical solution, the balance pole includes a first balance pole and a second balance pole, and the joint part includes a first joint part and a second joint part, the first joint part connects the first balance pole, and the second balance pole The joint part is connected to the second balance bar, the second balance bar is arranged on the outside of the first balance bar and the second balance bar is respectively connected to the keycap and the bottom plate, wherein the length of the first joint part is greater than or equal to the length of the second joint portion.

As an optional technical solution, the first balance pole has a middle section and two end sections extending from both ends of the middle section, the two end sections and the middle section form a U-shaped section, and are connected to the middle section The length of the first joint part is greater than the length of the first joint part connected to the end section.

As an optional technical solution, when the keycap is at the lowered position, the lower end point of the joint part is lower than the balance bar.

As an optional technical solution, when the keycap is at the lowered position, the lower end point of the joint part is lower than the balance bar, and the balance bar is respectively connected to the keycap and the bottom plate.

The present invention utilizes the cushioning design of the key structure to provide cushioning elasticity during key operation, avoiding or reducing the noise generated by the keycap directly colliding with the bottom plate.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

FIG. 1A and FIG. 1B are respectively an exploded view and a partial assembly view of a button structure according to an embodiment of the present invention;

FIG. 1C and FIG. 1D are schematic cross-sectional views of the button structure in FIG. 1A before and after pressing, respectively;

FIG. 2A and FIG. 2B are schematic diagrams of joint parts of different embodiments of the present invention;

Fig. 3 is the schematic diagram of the bottom plate of another embodiment of the present invention;

4A to 4E are schematic diagrams of membrane switches used as buffer sheets in different embodiments of the present invention;

5A and 5B are schematic diagrams of buffer sheets according to different embodiments of the present invention;

6A and 6B are respectively an exploded view and a partial assembly view of a button structure according to another embodiment of the present invention;

6C and 6D are cross-sectional schematic views of the button structure of FIG. 6A before and after pressing, respectively;

7A and 7B are respectively an exploded view and a partial assembly view of a button structure according to another embodiment of the present invention;

7C and 7D are schematic cross-sectional views of the button structure of FIG. 7A before and after pressing, respectively;

FIG. 8A and FIG. 8B are schematic diagrams of joint parts of different embodiments of the present invention; and

FIG. 9 is a schematic diagram of a keyboard device according to an embodiment of the present invention.

Detailed ways

The invention provides a key structure with mute design and a keyboard device with the key structure. Specifically, the button structure of the present invention may be a button structure of a computer keyboard, but it is not intended to be such. The button structure of the present invention can be buttons, number keys, etc. of other electronic devices. The key structure of the present invention can be any key structure with a joint, especially a key structure with a joint connected to a balance bar, such as a multiple key, but not limited thereto. Hereinafter, taking a computer keyboard as an example, details of the key structure of the embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1A and FIG. 6A, in one embodiment, the button structure 100/200 of the present invention includes a keycap 110, a balance bar 122/124, a bottom plate 130 and a buffer sheet 140, wherein the keycap 110 is arranged above the bottom plate 130, And it can move up/down relative to the bottom plate 130 . The balance bar 122 is connected to the keycap 110, and the balance bar 122/124 generally has two functions: (1) as shown in FIG. 1A, strengthen the structural strength of the keycap 110, or (2) as shown in FIG. driving force. In this way, when the user only presses the right side of the keycap, the left side of the keycap can also be lowered at the same time, so as to prevent the keycap 110 from appearing in a tilted state where the right side is lower and the left side is higher. The buffer sheet 140 is disposed on the bottom plate 130 to provide impact buffering when the keycap 110 moves downward toward the bottom plate 130 (details will be described later). It should be noted here that, although not shown in FIG. 1A and FIG. 1B , according to actual design requirements, the key structure 100 may also include other components, such as an elevating mechanism (such as scissors) that supports the up/down movement of the keycap 110 relative to the bottom plate 130. Lifting mechanism, butterfly lifting mechanism), providing a return unit (such as an elastic return unit or a magnetic return unit) that returns to the position before the keycap 110 is pressed after being pressed.

In the embodiment of FIG. 1A , the balance bar 122 is only connected to the keycap 110 to increase the strength of the keycap 110 . The balance bar 122 is preferably a non-enclosed frame-shaped bar, such as a rectangular frame balance bar with an opening 122a between two ends, so as to increase the deformation elasticity of the balance bar 122, thereby improving the convenience when the balance bar 122 is connected to the keycap 110 sex. Furthermore, the balance pole 122 preferably has a round shaft and can be made by bending metal wires, but is not limited thereto. In other embodiments, according to design requirements, the balance bar 122 may have a shaft in an oval shape, a square shape, etc., and may be made of any suitable material to increase the strength of the keycap 110 .

Correspondingly, the keycap 110 has a joint portion 112 for connecting the balance bar 122 . In this embodiment, the keycap 110 has a plurality of joints 112, wherein the plurality of joints 112 are arranged on the lower surface 110a of the keycap 110 corresponding to the frame profile of the balance bar 122, so as to respectively connect the corresponding shaft parts of the balance bar 122 . In other words, the plurality of combining portions 112 are disposed on the lower surface 110a of the keycap 110 in a frame-shaped distribution. Furthermore, the combining portion 112 protrudes from the lower surface 110 a of the keycap 110 . Specifically, as shown in FIG. 2A, the keycap 110 is composed of a keytop 111a and a keyskirt 111b surrounding the periphery of the keytop 111a, wherein the joint portion 112 extends downward from the lower surface 110a of the keytop 111a beyond the keyskirt 111b. the bottom surface of the key skirt 111b so that the lower end point of the coupling portion 112 protrudes from the bottom surface of the key skirt 111b.

In one embodiment, as shown in FIG. 2A , the joint portion 112 is a hook structure with a slot 112a, and the slot 112a has a slot opening 112b at the end of the hook structure (that is, the end away from the lower surface 110a), for The shaft of the balance pole 122 enters into the engaging slot 112 a to be connected with the joint portion 112 . When the balance bar 122 enters the slot 112a from the slot opening 112b and engages with the slot 112a , the lower end of the joint portion 112 is lower than the lower end of the balance bar 122 . In other words, in this embodiment, the depth of the slot 112a (that is, the distance from the end of the joint to the bottom of the slot) is greater than the diameter or thickness of the balance bar 122 (the dimension measured by the direction of the line connecting the keycap 110 and the bottom plate 130 , that is, the dimension in the vertical direction), so that the shaft of the balance bar 122 is substantially completely accommodated in the slot 112a. That is, the connection portion of the balance bar 122 and the joint portion 122 does not substantially protrude from the slot 112 a, so that the lower end point of the joint portion 112 is lower than the connection portion of the balance bar 122 and the joint portion 112 . In this embodiment, the diameter of the slot opening 112b is preferably smaller than the diameter of the balance pole 122 (ie, the dimension in the horizontal direction). Thereby, when the balance bar 122 enters the engaging slot 122 a and connects with the joint portion 112 , the movement of the balance bar 122 toward the opening 112 b of the engaging slot can be restricted, preventing the balance bar 122 from detaching from the joint portion 112 . Furthermore, the sidewall of the joint portion 112 defining the locking groove 112 a preferably has an appropriate thickness to provide flexibility for deformation and improve the connection convenience between the balance bar 122 and the joint portion 112 . In other words, when the balance bar 122 enters the slot 112a from the slot opening 112b , the sidewall of the coupling portion 112 defining the slot 112a can be elastically expanded outward so that the balance bar 122 enters the slot 112a.

It should be noted here that although the embodiment shown in FIG. 2A shows that the balance bar 122 enters the engaging groove 112 a from the end (ie, the bottom surface) of the joint part 112 to connect with the joint part 112 , it is not limited thereto. In other embodiments, as shown in FIG. 2B , the slot opening 112b' can be opened on the side of the joint part 112', so that the balance bar 122 enters the slot 112a' from the side of the joint part 112' to connect with the joint part 112' connect.

Furthermore, the bottom plate 130 is disposed under the keycap 110 , and the bottom plate 130 has a recessed space 132 corresponding to the joint portion 112 of the keycap 110 . In this embodiment, the recessed space 132 is preferably formed by perforations (as shown in FIG. 1C ) formed on the bottom plate 130 , but it is not limited thereto. In other embodiments, as shown in FIG. 3 , the recessed space 132' can be formed by a groove formed on the bottom plate 130. When the keycap 110 moves toward the bottom plate 130 , the recessed space 132 serves as an avoidance area for the joint portion 112 , allowing the joint portion 112 to extend into the recessed space 132 . In this embodiment, the bottom plate 130 is a metal plate, but not limited thereto.

As shown in FIG. 1B and FIG. 1C , the buffer sheet 140 is disposed on the bottom plate 130 , wherein the buffer sheet 140 substantially covers the recessed space 132 , and the buffer sheet 140 has a deformable portion 142 corresponding to the recessed space 132 . Generally, the deformable portion 142 on the buffer sheet 140 can be formed by changing the thickness, material, or shape to provide a greater amount of deformation. For example: the deformable part 142 can be (a) relatively thinner, (b) injected or bonded with a softer material, or (c) easily deformable, such as a movable tongue with three sides cut off.

Specifically, in a preferred embodiment, the deformable portion 142 of the buffer sheet 140 is a relatively thinner portion, so that the deformable portion 142 has a larger elastic deformation force than other parts of the buffer sheet 140, Moreover, the design of the deformable portion 142 can prevent the entire buffer sheet 140 from being damaged due to too thin thickness, thereby increasing manufacturability. In this embodiment, the thickness of the deformable portion 142 is preferably not greater than 0.075 mm, but not limited thereto. The deformable portion 142 of the buffer sheet 140 preferably covers the recessed space 132, and the rest of the buffer sheet 140 (i.e., the non-deformable portion) covers the surface of the bottom plate around the recessed space 132, so that the deformable portion 142 is The elastic deformation provides a buffer mechanism for the joint part 112 of the keycap 110 to move downward, so as to achieve the effect of noise reduction. As shown in FIG. 1D , when the keycap 110 is pressed, the keycap 110 will move downward to a lower position (or called a lowered position, the same below), that is, when the keycap 110 moves to a lower position toward the bottom plate 130 , the lower end point of the joint portion 112 is lower than the balance bar 122 , and the lower end point of the joint portion 112 presses against the deformable portion 142 toward the recessed space 132 , so that the deformable portion 142 extends into the recessed space 132 . Specifically, when the keycap 110 moves toward the bottom plate 130, the joint portion 112 protrudes from the bottom surface of the key skirt 111b of the keycap 110 and first hits the deformable portion 142 of the buffer sheet 140, thereby deforming the deformable portion 142 downward. And enter the recessed space 132 of the bottom plate 130 . In this way, without increasing the height of the keys, not only the joint portion 112 of the keycap 110 has enough room for downward movement, but also the deformable portion 142 of the buffer sheet 140 abuts against the joint portion 112 as a buffer elastic body to achieve Noise reduction effect.

In a preferred embodiment, the buffer sheet 140 is a membrane switch, wherein the membrane switch is partially hollowed out to form a blind hole as the deformable portion 142 . Specifically, the membrane switch has a multi-layer structure, wherein at least one layer of the membrane switch forms at least one membrane opening corresponding to the recessed space 132 and at least another layer of the membrane switch substantially covers the at least one membrane opening as the deformable portion 142 . In other words, the total thickness of at least one other layer (that is, the deformable portion) substantially covering at least one membrane opening in the membrane switch is preferably not greater than 0.075 mm.

For example, in one embodiment, as shown in FIG. 4A , the membrane switch 140a has a three-layer structure, wherein the first layer 144 and the third layer 148 are circuit layers, and the second layer 146 is disposed on the first layer 144 and the third layer. The interlayer between the three layers 148 is used to separate the circuits of the first layer 144 and the third layer 148 . When the keycap 110 moves toward the bottom plate 130 to actuate the membrane switch 140a, the circuit contact between the first layer 144 and the third layer 148 is conducted to output an actuation signal. In this embodiment, the first layer 144 and the second layer 146 of the membrane switch 140a form membrane openings 144a, 146a in the parts corresponding to the recessed space 132, wherein the membrane openings 144a, 146a are connected, and the third layer 148 covers the membrane opening 146a The deformable part 142 is formed at the bottom of the deformable part 142, wherein the deformable part 142 includes a film groove on the upper side, wherein the notch of the film groove faces the keycap 110 (that is, the form is recessed downward). In other words, the thickness of the third layer 148 is equal to the thickness of the deformable portion 142 , and the portion of the third layer 148 corresponding to the film openings 144 a and 146 a is the above-mentioned deformable portion 142 , serving as a cushioning elastic body in contact with the joint portion 112 .

It should be noted here that when the buffer sheet is a membrane switch, the deformable portion 142 can have different forms due to the multi-layer structure of the membrane switch, which is not limited to that shown in FIG. 4A . In another embodiment, as shown in FIG. 4B, the first layer 144 and the third layer 148 of the membrane switch 140b form membrane openings 144a, 148a in the parts corresponding to the recessed space 132, wherein the membrane openings 144a, 148a are not connected and are connected by The second layer 146 separates. In other words, the second layer 146 covers the opposite sides of the film openings 144a, 148a to form the deformable portion 142, wherein the deformable portion 142 includes two film grooves on the upper and lower sides, wherein the first layer 144 The notch of the film groove formed by the film opening 144a of the second layer 146 and the covering part of the second layer 146 faces the keycap 110 (that is, the form of a downward depression), while the film opening 148a of the third layer 148 and the film opening 148a of the second layer 146 The notch of the film groove formed by the covering portion faces the bottom plate 130 (ie, in the form of an upward depression). In this embodiment, the thickness of the second layer 146 is the thickness of the deformable part 142, and the part of the second layer 146 corresponding to the film openings 144a, 148a is the above-mentioned deformable part 142, so as to serve as a buffer elastic contact with the joint part 112 body.

In another embodiment, as shown in FIG. 4C, the second layer 146 and the third layer 148 of the membrane switch 140c form membrane openings 146a, 148a in the parts corresponding to the recessed space 132, wherein the membrane openings 146a, 148a are connected, and the first The layer 144 covers the film opening 146 a to form the deformable part 142 , wherein the deformable part 142 includes a film groove on the lower side, wherein the notch of the film groove faces the bottom plate 130 . In other words, the thickness of the first layer 144 is equal to the thickness of the deformable portion 142 , and the portion of the first layer 144 corresponding to the film opening 146 a is the above-mentioned deformable portion 142 , serving as a cushioning elastic body in contact with the joint portion 112 .

In another embodiment, as shown in FIG. 4D , the first layer 144 of the membrane switch 140d forms a membrane opening 144a in a portion corresponding to the recessed space 132, and the second layer 146 and the third layer 148 cover the membrane opening 144a below, The deformable part 142 is formed by the deformable part 142 , wherein the deformable part 142 includes a film groove on the upper side, wherein the notch of the film groove faces the keycap 110 . In other words, the total thickness of the second layer 146 and the third layer 148 is the thickness of the deformable part 142, preferably not greater than 0.075mm, and the part of the second layer 146 and the third layer 148 corresponding to the film opening 144a is the above-mentioned deformable part. The part 142 serves as a cushioning elastic body in contact with the joint part 112 .

In another embodiment, as shown in FIG. 4E , the third layer 148 of the membrane switch 140e forms a membrane opening 148a in a portion corresponding to the recessed space 132, and the first layer 144 and the second layer 146 cover the membrane opening 148a, The deformable part 142 is formed in the deformable part 142 , wherein the deformable part 142 includes a film groove on the lower side, wherein the notch of the film groove faces the bottom plate 130 . In other words, the total thickness of the first layer 144 and the second layer 146 is the thickness of the deformable portion 142, preferably not greater than 0.075mm, and the portion of the first layer 144 and the second layer 146 corresponding to the film opening 148a is the above-mentioned deformable portion. The part 142 serves as a cushioning elastic body in contact with the joint part 112 .

In other embodiments, as shown in FIG. 5A and FIG. 5B , the buffer sheet 140 includes a membrane switch 140f and a membrane 141, wherein the membrane switch 140f has a through hole 149 corresponding to the joint portion 112, and the membrane 141 covers the through hole 149- The side serves as the deformable portion 142 . Accordingly, when the keycap 110 moves toward the bottom plate, the joint portion 112 presses against the diaphragm 141 through the through hole 149 , so that the diaphragm 141 extends into the recessed space 132 . Specifically, in the embodiment of FIG. 5A , the diaphragm 141 is covered under the through hole 149 as the deformable portion 142, so that when the keycap 110 moves toward the bottom plate 130, the joint portion 112 passes through the through hole 149 toward the recessed space 132. Pressing against the diaphragm 141 extends the diaphragm 141 into the recessed space 132 (similar to FIG. 1D ). Membrane switch 140f may have a multi-layer structure similar to the above, wherein membrane openings 144a, 146a, 148a are respectively formed in the first layer 144, second layer 146, and third layer 148 corresponding to the recessed space 132, and the membrane openings 144a, 146a, 148a A through hole 149 is formed in communication. In the embodiment of FIG. 5A , the diaphragm 141 covers below the through hole 149 (that is, covers below the third layer 148), and the part of the diaphragm 141 covering the through hole 149 (that is, the part corresponding to the through hole 149) is the above-mentioned The deformable part 142 serves as a buffer elastic body in contact with the combining part 112 . In the embodiment of FIG. 5B , the diaphragm 141 covers the top of the through hole 149 (that is, covers the top of the first layer 144) as the deformable portion 142, so that the diaphragm 141 can be provided with a plurality of keycaps required by the keyboard. A plurality of elastic bodies (rubberdome) is convenient for assembling all the plurality of elastic bodies above the bottom plate at one time. That is, the diaphragm 141 can be a sheet connected with a plurality of elastic bodies. In the embodiment of FIG. 5B , when the keycap 110 moves toward the bottom plate 130 , the joint portion 112 presses against the diaphragm 141 toward the recessed space 132 through the through hole 149 , so that the diaphragm 141 extends into the recessed space 132 . In one embodiment, the membrane 141 can be a polyester sheet or a rubber sheet, and the thickness of the membrane 141 is preferably smaller than that of the membrane switch 140f. For example, the film 141 can be Mylar, and the thickness is preferably less than 0.075mm, but not limited thereto. It should be noted here that when the material of the deformable part 142 has relatively large deformation elasticity, the thickness of the deformable part 142 can be greater than 0.075 mm and the above-mentioned elastic deformation can still be generated when the deformable part 142 collides with the connecting part 112 .

In addition, although FIG. 1A shows that the balance bar 122 is only connected to the keycap 110 , the balance bar may have different forms and quantities according to the key size and/or design requirements. In another embodiment, as shown in FIGS. 6A to 6C , the button structure 200 of the present invention includes a keycap 110, a balance bar 124, a bottom plate 130, and a buffer sheet 140, wherein the keycap 110, the bottom plate 130, and the buffer sheet 140 respectively have Similar to the configuration of the above-mentioned joint portion, recessed space 132, and deformable portion 142, the buffer sheet 140 can be implemented as the membrane switches 140a-140e in FIGS. 4A to 4E, or the membrane 141 and the membrane switch 140f in FIG. 5. The following description focuses on the differences of this embodiment. Specifically, the balance bar 124 is connected between the keycap 110 and the bottom plate 130, that is, one side of the balance bar 124 is connected to the keycap 110, and the other side is connected to the bottom plate 130, so as to improve the driving performance of the keycap 110; When the user only presses the right side of the keycap, the left side of the keycap can also be lowered at the same time, so as to prevent the keycap 110 from being inclined on the right side and on the left side. In this embodiment, the balance bar 124 is a U-shaped bar, and has extensions 124 a bent toward the U-shaped opening at both ends of the U-shape, wherein the extensions 124 a serve as hooks slidably engaged with the bottom plate 130 . Specifically, in addition to the above-mentioned recessed space 132 , the bottom plate 130 also has a connection portion 134 engaged with the extension portion 124 a of the balance bar 124 . In this embodiment, the connecting portion 134 is a connecting mechanism bent upward from the surface of the bottom plate 130 , wherein the connecting portion 134 has a slide groove 134 a. It should be noted here that the buffer piece 140 has a corresponding opening 143 for allowing the connecting portion 134 to protrude from the opening 143 so that the extension portion 124 a of the balance bar 124 can be slidably inserted into the slot 134 a. When the keycap 110 moves relative to the bottom plate 130 , the extension part 124 a moves in the sliding slot 134 a to improve the balance of the keycap 110 moving. Corresponding to the configuration of the balance bar 124 , the keycap 110 has a corresponding coupling portion 114 for connecting the balance bar 124 . In this embodiment, a plurality of joint portions 114 are disposed on the lower surface 110 a of the keycap 110 corresponding to the balance bar 124 , so as to respectively connect corresponding shaft portions of the balance bar 124 . Similar to the aforementioned joint portion 112, the joint portion 114 protrudes from the lower surface 110a of the keycap 110, and the lower end point of the joint portion 114 protrudes from the bottom surface of the key skirt. It should be noted here that the joint portion 114 may have a hook structure similar to that shown in FIG. 2A or FIG. 2B , so that the lower end point of the joint portion 114 is lower than the lower end point of the balance pole 124 , so details are not repeated here. As shown in FIG. 6D , when the keycap 110 moves toward the bottom plate 130 to a lower position (or referred to as a lowered position, the same below), the lower end point of the joint portion 114 is lower than the balance bar 124 , and the lower end point of the joint portion 114 faces toward the lower position. The recessed space 132 presses against the deformable portion 142 , so that the deformable portion 142 extends into the recessed space 132 . Thereby, the joint portion 114 of the keycap 110 has sufficient space for downward movement, and at the same time, the deformable portion 142 of the buffer sheet 140 abuts against the joint portion 114 as a buffer elastic body to achieve the effect of noise reduction.

In another embodiment, as shown in FIGS. 7A to 7C , the button structure 300 of the present invention includes a keycap 110, balance bars 122, 124 (or the balance bar 122 is called the first balance bar, and the balance bar 124 is called the second balance bar. Two balance bars, the same below), base plate 130 and buffer sheet 140. In other words, the button structure 300 of the present invention has both the balance bar 122 of FIG. 1A and the balance bar 124 of FIG. 114 is called the second joint, the first joint 112 is connected to the first balance pole 122, and the second joint 114 is connected to the second balance pole 124, the same below). In this embodiment, the balance bar 124 is preferably disposed on the outside of the balance bar 122 to serve as a link between the keycap 110 and the bottom plate 130 . Furthermore, the recessed space 132 of the bottom plate 130 and the deformable portion 142 of the buffer sheet 140 can have appropriate sizes and positions, so that the adjacent joint portions 112, 114 can be pressed against different parts of the same deformable portion 142 and thus deformable. The portion 142 deforms and extends into the same recessed space 132 (as shown in FIG. 7D ), but not limited thereto. In other embodiments, the recessed space 132 of the bottom plate 130 and the deformable portion 142 of the buffer sheet 140 can form individual correspondences with the joint portions 112, 114, so that the joint portions 112, 114 can be pressed against different deformable portions 142, thereby enabling The deformable portion 142 deforms and extends into the corresponding recessed space 132 .

In addition, in one embodiment, as shown in FIG. 8A , the balance pole 122 preferably has a curved section, so that the middle section 122 b of the balance pole 122 is lower than the two end sections 122 c. Specifically, the balance pole 122 has a middle section 122b and two end sections 122c extending from two ends of the middle section 122b, and the two end sections 122c and the middle section 122b form a U-shaped section. Correspondingly, the length of the joint portion 1121 of the keycap 110 connected to the middle section 122b is longer than the length of the joint portion 1122 connected to the end section 122c, wherein the joint portion 1121 is located closer to the center of the keycap 110 than the joint portion 1122 . That is, the distance from the lower surface of the keycap 110 to the bottom of the slot 1121a from the joint portion 1121 is greater than the distance from the lower surface of the keycap 110 to the bottom of the slot 1122a from the joint portion 1122, so that the balance bar 122 maintains a U-shaped section.

Furthermore, the length of the joint portion 112 (that is, the first joint portion 112 ) connected to the balance pole 122 is preferably greater than (as shown in FIG. 8B ) or equal to (as shown in FIG. 7C ) the length of the joint portion connected to the outer balance pole 124 114 (that is, the length of the second joint portion 114). That is, the joint portion (such as the joint portion 112 ) disposed on the inner side of the lower surface 110 a of the keycap 110 has a length greater than or equal to that of the outer joint portion (such as the joint portion 114 ).

In another embodiment, as shown in FIG. 9 , the present invention provides a keyboard device 10 , which includes the above-mentioned key structure 100 , 200 and/or 300 . The keyboard device 10 of the present invention uses the buffer design of the key structure 100 , 200 or 300 to provide buffer elasticity during key operation, so as to avoid or reduce the noise generated by the keycap directly colliding with the bottom plate. Furthermore, the keyboard device 10 of the present invention uses the multi-layer structure of the membrane switch of the key structure to form a cushioning design, which can effectively achieve the effect of noise reduction without increasing the cost of materials.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding changes All changes and modifications should belong to the scope of protection of the appended claims of the present invention.

Claims (12)

1. a press-key structure, is characterized in that comprising:

Keycap, has joint portion and lower surface, and this joint portion is given prominence to from this lower surface;

Balancing pole, is connected to this joint portion, and the lower extreme point of this joint portion is lower than the coupling part of this balancing pole and this joint portion;

Base plate, be arranged at below this keycap, this base plate has dented space, and this dented space is to should joint portion; And

Buffer substrate tablet, is arranged on this base plate, and this buffer substrate tablet covers this dented space and this buffer substrate tablet has deformable part, this deformable part to should dented space,

Wherein when this keycap is pressed, this keycap moves to down position towards this base plate, and this lower extreme point of this joint portion compresses this deformable part, and this deformable part is extended in this dented space.

2. press-key structure according to claim 1, is characterized in that: this dented space is formed by the holes or groove being formed at this base plate.

3. press-key structure according to claim 1, it is characterized in that: this buffer substrate tablet is thin film switch, this thin film switch has sandwich construction, at least one deck in this thin film switch this dented space corresponding forms at least one film openings, and at least another layer in this thin film switch covers this at least one film openings to form this deformable part.

4. press-key structure according to claim 3, is characterized in that: this deformable part comprises thin-film groove, and this thin-film groove is made up of this film openings and the part that covers this film openings, and the notch of this thin-film groove is towards this keycap or towards this base plate.

5. press-key structure according to claim 3, is characterized in that: this deformable part comprises two thin-film groove, and the notch of these two thin-film groove is respectively towards this keycap and this base plate.

6. press-key structure according to claim 3, is characterized in that: the gross thickness of this at least another layer covering this at least one film openings in this thin film switch is not more than 0.075mm.

7. press-key structure according to claim 1, is characterized in that: this buffer substrate tablet comprises thin film switch and diaphragm, and this thin film switch has through hole, this through hole to should joint portion,

This membrane covered is in the below of this through hole as this deformable part, and when this keycap moves towards this base plate, this joint portion compresses this diaphragm through this through hole towards this dented space, makes this diaphragm extend into this dented space;

Or in the top of this through hole, as this deformable part, when this keycap moves towards this base plate, this joint portion compresses this diaphragm by this through hole towards this dented space to this membrane covered, makes this diaphragm extend into this dented space.

8. press-key structure according to claim 7, is characterized in that: this diaphragm is polyester sheet or sheet rubber, and the thickness of this diaphragm is less than the thickness of this thin film switch.

9. press-key structure according to claim 1, it is characterized in that: this balancing pole comprises the first balancing pole and the second balancing pole, this joint portion comprises the first joint portion and the second joint portion, this first joint portion connects this first balancing pole, this second joint portion connects this second balancing pole, this second balancing pole is arranged at the outside of this first balancing pole and this second balancing pole is connected to this keycap and this base plate, and wherein the length of this first joint portion is more than or equal to the length of this second joint portion.

10. press-key structure according to claim 9, it is characterized in that: the both ends section that this first balancing pole has interlude and extends from these interlude two ends, this both ends section and this interlude form U-shaped section, and the length being connected to this first joint portion of this interlude is greater than the length of this first joint portion being connected to this end segments.

11. press-key structures according to claim 1, is characterized in that: when this keycap is positioned at this down position, and this lower extreme point of this joint portion is lower than this balancing pole.

12. press-key structures according to claim 1, is characterized in that: when this keycap is positioned at this down position, and this lower extreme point of this joint portion is lower than this balancing pole, and this balancing pole is connected to this keycap and this base plate.