CN108878201A - Press-key structure - Google Patents

Abstract

A key structure includes a key cap, a bottom plate, a lifting mechanism connected between the key cap and the bottom plate, and a switch arranged under the key cap. The switch includes a base body, a fixed magnetic attraction fixed on the base, two electrical terminals, and a trigger bracket and a conduction bracket arranged on the base which can rotate or deflect relative to the fixed magnetic attraction. The fixed magnetic parts can attract the trigger bracket to approach. One of the electrical terminals is disposed corresponding to the contact portion of the lead-through bracket. When the pressing part of the conducting bracket exposed on the seat body is not pressed by the keycap, the triggering bracket pushes against the conducting bracket so that the contact part does not contact the corresponding electrical terminal. When the pressing part is pressed by the keycap, the conduction bracket is close to the fixed magnetic member so that the contact part contacts the corresponding electrical terminal, so that the electrical terminal is conducted. When the button structure of the present invention is actuated, since the pressing force received by the key cap has nothing to do with the force that triggers the switch contact (ie, the electrical terminal), it has the effect of protecting the contact and making the key structure have a longer service life.

Description

key structure

technical field

The invention relates to a key structure, in particular to a key structure with mechanical opening and closing.

Background technique

The traditional key structure with mechanical opening and closing usually uses the keycap to trigger the switch contact directly or indirectly through the elastic round protrusion, but no matter which trigger mechanism is mentioned above, the force exerted by the trigger switch contact is directly related to the force exerted by the user pressing the keycap , which will make the contact force on the switch contacts fluctuate from time to time. This phenomenon may not only cause excessive wear on the contact surface and affect the contact resistance of the contact, but may also cause fatigue of the elastic structure connecting the contact (for example, the elastic structure such as a cantilever structure produces a contact open and closed state). Therefore, the service life of switches with this type of button structure will be shortened to varying degrees with the user's habit of pressing and applying force. Sensitivity of the switch decreases.

Contents of the invention

In view of the problems in the prior art, the present invention provides a key structure to solve the above problems.

Therefore, the technical problem to be solved by the present invention is to provide a button structure, which includes:

keycap;

the bottom plate is arranged under the key cap;

A lifting mechanism is correspondingly arranged between the base plate and the keycap, and the keycap can move up and down relative to the base plate through the lifting mechanism; and

The switch includes a base, a fixed magnetic attraction, a trigger bracket, a conduction bracket, a first electrical terminal, and a second electrical terminal. The base is fixed below the keycap relative to the bottom plate. The fixed magnetic attraction, the The first electrical terminal and the second electrical terminal are fixedly arranged on the base body, the trigger bracket and the conduction bracket are rotatably or deflectably arranged on the base body, the trigger bracket has a pressing part, a first magnetic The suction part and the first push part, the pressing part protrudes from the base and is located under the keycap, a first magnetic force is generated between the first magnetic part and the fixed magnetic part, and the conduction bracket has a contact portion and a second resisting portion, the contact portion is disposed opposite to the first electrical terminal, and the first resisting portion is disposed opposite to the second resisting portion;

Wherein, when the pressing part is not pressed, the first magnetic force drives the trigger bracket to rotate to the fixed magnetic part, so that the trigger bracket pushes against the second pushing part through the first pushing part so that the The conductive bracket is rotated away from the fixed magnetic attraction so that the contact portion is away from the first electrical terminal;

Wherein, when the keycap moves toward the bottom plate to press the pressing portion to the set position, the first resisting portion is separated from the second resisting portion, and the contact portion contacts the first electrical terminal to conduct the second electrical terminal. An electrical terminal and the second electrical terminal.

As an optional technical solution, the contact portion can conduct electricity, the conduction bracket has a second magnetic attraction portion, and a second magnetic attraction force is generated between the second magnetic attraction portion and the fixed magnetic attraction component. When the keycap faces the When the bottom plate moves to press the pressing part to the set position, the second magnetic force drives the conducting bracket to rotate to the fixed magnetic attracting part, so that the contact part contacts the first electrical terminal to conduct the first electrical terminal and the second electrical terminal.

As an optional technical solution, the contact portion can conduct electricity, the second electrical terminal is fixedly connected to the conduction bracket and electrically connected to the contact portion, the conduction bracket has an elastic cantilever structure, when the keycap moves toward the bottom plate When the pressing portion is pressed to the set position, the elastic cantilever structure of the conduction bracket is elastically deformed, so that the contact portion contacts the first electrical terminal to conduct conduction between the first electrical terminal and the second electrical terminal.

As an optional technical solution, the button structure further includes an auxiliary magnetic attraction piece, which is arranged on the conduction bracket corresponding to the fixed magnetic attraction piece.

As an optional technical solution, when the contact portion contacts the first electrical terminal to conduct conduction between the first electrical terminal and the second electrical terminal, the first resisting portion and the second resisting portion are separated.

As an optional technical solution, the trigger bracket is set rotatably relative to the base with its first end as a fulcrum, the first magnetic attraction part is located between the first end and the pressing part and is located on the fixed Below the magnetic attraction part, the conduction support is rotatable relative to the base with its second end as a fulcrum, and the conduction support has a second magnetic attraction part, which is located at the second end and Between the contact parts and above the fixed magnetic attraction part.

As an optional technical solution, the seat body includes an upper cover and a lower seat, the upper cover and the lower seat are connected to form an accommodating space, the upper cover and the lower seat clamp the fixed magnetic attraction, and the conductive bracket is set In the accommodating space, the first end portion, the first resisting portion and the first magnetic attraction portion are located in the accommodating space, and the first electrical terminal and the second electrical terminal are connected from the accommodating space Protruding from the base, the contact portion is located above the first electrical terminal.

As an optional technical solution, the trigger bracket is pivotally connected to the upper cover via the first end, and the conduction bracket is located between the trigger bracket and the upper cover.

As an optional technical solution, the trigger bracket has a rotating connection part, which is located between the first pushing part and the first magnetic attraction part, and the trigger bracket uses the rotating connection part as a fulcrum relative to the seat The body is rotatable, the first magnetic attraction part is located between the rotating connection part and the pressing part and is located below the fixed magnetic attraction part, and the conduction bracket is rotatable relative to the base with its end as a fulcrum, and is located at Below the fixed magnetic piece.

As an optional technical solution, the seat body has a groove, the opening of the groove faces downward and forms an accommodating space, the conducting bracket is arranged in the accommodating space, the bending portion, the first resisting portion and The first magnetic attraction part is located in the accommodating space, the first electrical terminal and the second electrical terminal protrude from the seat body in the accommodating space, and the contact part is located under the first electrical terminal.

As an optional technical solution, the first resisting portion is located between the second resisting portion and the base.

As an optional technical solution, the trigger bracket has an opening, and the conduction bracket passes through the opening.

As an optional technical solution, the fixed magnetic attraction part is a magnet, and the conducting bracket is a paramagnetic metal part.

As an optional technical solution, the trigger bracket includes a paramagnetic metal piece and a plastic cover, and the plastic cover is sleeved on one end of the paramagnetic metal piece as the pressing portion.

As an optional technical solution, the trigger bracket includes a spring abutted between the plastic cover and the end portion, and when the keycap moves toward the bottom plate to press the pressing portion, the plastic cover compresses the spring.

Compared with the prior art, the button structure of the present invention has the function of protecting the contacts because the pressing force received by the key cap has nothing to do with the force of triggering the switch contacts (that is, the electrical terminals) when it is actuated, so that the service life of the switch will be extended. The service life of the mechanical switch is longer than that of the prior art, so that the service life of the key structure is also longer than that of the key structure of the prior art.

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. 1 is a schematic diagram of the key structure of the first embodiment.

FIG. 2 is a schematic diagram of partial explosion of the button structure in FIG. 1 .

Fig. 3 is a schematic diagram of partial explosion of the switch in Fig. 2 .

Fig. 4 is an exploded view of the switch in Fig. 2 .

Fig. 5 is a cross-sectional view of the switch in Fig. 3 along line X-X.

FIG. 6 is a cross-sectional view of the switch in FIG. 5 when the pressing portion of the trigger bracket is pressed.

Fig. 7 is a schematic diagram of partial explosion of the key structure of the second embodiment.

Fig. 8 is a schematic diagram of partial explosion of the switch in Fig. 7 .

Fig. 9 is an exploded view of the switch in Fig. 7 .

FIG. 10 is a cross-sectional view of the switch in FIG. 8 along line Y-Y.

FIG. 11 is a cross-sectional view of the switch in FIG. 10 when the pressing portion of the trigger bracket is pressed.

Fig. 12 is a schematic diagram of partial explosion of the button structure of the third embodiment.

Fig. 13 is a schematic diagram of partial explosion of the switch in Fig. 12 .

Fig. 14 is an exploded view of the switch in Fig. 12 .

Fig. 15 is a cross-sectional view of the switch in Fig. 13 along line Z-Z.

FIG. 16 is a cross-sectional view of the switch in FIG. 15 when the pressing portion of the trigger bracket is pressed.

Detailed ways

In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

Please refer to Fig. 1 to Fig. 6, Fig. 1 is the schematic diagram of the button structure of the first embodiment; Fig. 2 is the schematic diagram of the partial explosion of the button structure in Fig. 1; Fig. 3 is the schematic diagram of the partial explosion of the switch in Fig. 2; Exploded view of the switch in Figure 2; Figure 5 is a cross-sectional view of the switch in Figure 3 along the line X-X; Figure 6 is a cross-sectional view of the switch in Figure 5 when the pressing part of its trigger bracket is pressed. The key structure 1 of the first embodiment includes a key cap 12 , a bottom plate 14 , a lifting mechanism 16 and a switch 18 . The bottom plate 14 is disposed under the keycap 12 . The lifting mechanism 16 is correspondingly disposed between the bottom plate 14 and the keycap 12 , and the keycap 12 can move up and down relative to the bottom plate 14 through the lifting mechanism 16 . In this embodiment, the lifting mechanism 16 is a scissors foot bracket, which is connected to the connection structure 124 provided on the lower surface of the keycap 122 of the keycap 12 and the connection structure 144 provided on the upper surface of the board body 142 of the bottom plate 14; The invention is not limited thereto, for example, a cantilever structure, a telescoping mechanism with a stacked tubular structure, or two separate brackets are used to implement the lifting mechanism. The switch 18 includes a base 182 , a fixed magnetic member 184 , a trigger bracket 186 , a conduction bracket 188 , a first electrical terminal 190 and a second electrical terminal 192 . The seat body 182 is fixedly disposed below the keycap 12 relative to the bottom plate 14 . In this embodiment, the seat body 182 is directly fixed on the board body 142, for example, the seat body 182 is inserted into a groove or an opening formed on the board body 142, or the seat body 182 is adhered or fixed (such as Screws, hook structure) are fixed on the plate body 142. The fixed magnetic component 184 , the first electrical terminal 190 and the second electrical terminal 192 are fixedly disposed on the base body 182 . The trigger bracket 186 and the conduction bracket 188 are rotatably disposed on the base body 182 . The trigger bracket 186 has a pressing portion 1862 , a first magnetic attraction portion 1864 , a first end portion 1868 and a first resisting portion 1866 , and the trigger bracket 186 is rotatably connected to the base body 182 with the first end portion 1868 . The pressing portion 1862 protrudes from the base 182 and is located below the keycap 12 . A first magnetic attraction force F1 (shown by double arrows in FIGS. 5 and 6 ) is generated between the first magnetic attraction portion 1864 and the fixed magnetic attraction member 184 . The conduction bracket 188 has a contact portion 1882, a second magnetic attraction portion 1884, a second resisting portion 1886, and a second end portion 1888. The contact portion 1882 is arranged opposite to the first electrical terminal 190, and the conduction bracket 188 has a second end portion 1888 is a fulcrum that is rotatably connected with the seat body 182 . The second magnetic attraction force F2 (shown by double arrows in FIG. 5 and FIG. 6 ) is generated between the second magnetic attraction portion 1884 and the fixed magnetic attraction member 184 , and the first resisting portion 1866 is opposite to the second resisting portion 1886 .

Wherein, in principle, the moment generated by the first magnetic attraction force F1 on the trigger support 186 is greater than the moment produced by the second magnetic attraction force F2 on the conduction support 188, so as shown in FIG. 5, when the pressing part 1862 is not pressed (for example, not is pressed by the keycap 12), the first magnetic attraction force F1 drives the trigger bracket 186 to rotate to the fixed magnetic attraction piece 184, so that the trigger bracket 186 pushes the second push portion 1886 through the first push portion 1866 so that the conduction bracket 188 rotates The contact portion 1882 is away from the first electrical terminal 190 away from the fixed magnetic attraction 184 ; in other words, the first electrical terminal 190 and the second electrical terminal 192 are not conducted (or electrically connected), that is, the switch 18 is not triggered. Also, as shown in FIG. 6 , when the keycap 12 moves toward the bottom plate 14 to press the pressing portion 1862 (for example, the keycap 12 is pressed by the user so that the lower surface of the cap body 122 contacts and presses the pressing portion 1862 downward), the bracket 186 is triggered. Constrained by an external force (that is, the pressing force on the pressing part 1862), the first magnetic attraction force F1 is overcome by the external force, the trigger bracket 186 is rotated away from the fixed magnetic attraction part 184, and the second magnetic attraction force F2 drives the second resistance of the conduction bracket 188 The portion 1886 continues to abut against the first resisting portion 1866 , and the conducting bracket 188 is rotated to fix the magnetic element 184 .

When the pressing part 1862 is pressed to the set position (as shown in FIG. 6 ), the contact part 1882 contacts the first electrical terminal 190 to conduct the first electrical terminal 190 and the second electrical terminal 192, and the first resisting part 1866 and The second resisting portion 1886 of the conduction bracket 188 begins to separate; in other words, the first electrical terminal 190 and the second electrical terminal 192 are electrically connected (or electrically connected), that is, the switch 18 is triggered. When the pressing part 1862 is further pressed down, the first resisting part 1866 is completely separated from the second resisting part 1886; it can be seen from the structure of the switch 18 that the contact force of the contact part 1882 contacting the first electrical terminal 190 at this time depends on the first The second magnetic attraction force F2 has nothing to do with the pressing force of the pressing part 1862. Therefore, in principle, the contact force of each time the contact part 1882 touches the first electrical terminal 190 is the same, so the effect of protecting the contacts (electrical terminals 190, 192) can be achieved. . In addition, the state of the switch 18 shown in FIG. 6 is supplemented, wherein the contact portion 1882 has contacted the first electrical terminal 190, and the first resisting portion 1866 is still in contact with the second resisting portion 1886, but it can be seen from the figure that the trigger bracket 186 is still Can continue to be pressed and continue to rotate clockwise so that the first resisting portion 1866 is completely separated from the second resisting portion 1886, so FIG. 6 is only to show that the trigger bracket 186 rotates clockwise from the state shown in FIG. In the process of being pressed), the contact portion 1882 can contact the first electrical terminal 190 when it is not fully pressed, and finally when it is fully pressed, the first resisting portion 1866 and the second resisting portion can naturally be made to contact each other. 1886 is completely separated, and the contact portion 1882 is kept in contact with the first electrical terminal 190 by the second magnetic attraction force F2.

In addition, when the external force pressing the keycap 12 disappears, the first magnetic force F1 drives the trigger bracket 186 to rotate to the fixed magnetic component 184 and pushes the conduction bracket 188 to rotate away from the fixed magnetic component 184, so that the contact portion 1882 is far away from the first electrical component. terminal 190 (that is, the first electrical terminal 190 and the second electrical terminal 192 are not conducting), and the pressing part 1862 moves upward to drive the keycap 12 back to its original position; in other words, the first magnetic attraction force F1 is also used to drive The keycap 12 returns to its original position, or the first magnetic attraction force F1 also serves as the restoring force of the keycap 12 . In addition, in this embodiment, when the contact portion 1882 contacts the first electrical terminal 190 to conduct the first electrical terminal 190 and the second electrical terminal 192, the first resisting portion 1866 and the second resisting portion 1886 are separated, thus It can ensure that the contact portion 1882 contacts the first electrical terminal 190, but it is not limited to this in actual operation. For example, based on the structure of the trigger bracket 186 and the conduction bracket 188 still have a certain degree of cantilever elastic characteristics, it can be properly designed so that The first resisting portion 1866 and the second resisting portion 1886 are still in contact when the contact portion 1882 contacts the first electrical terminal 190 . In addition, when the trigger bracket 186 and the conduction bracket 188 are both made of metal structures, the aforementioned cantilever elastic properties will be more obvious. Moreover, in this embodiment, the contact portion 1882 and the second resisting portion 1886 of the conductive support 188 are also visible relative to the second magnetic attraction portion 1884 (or the second end 1888 of the conductive support 188). It is a separate cantilever structure, so when the first resisting part 1866 and the second resisting part 1886 push against each other, the linkage between the contact part 1882 and the second resisting part 1886 will also introduce the elastic deformation of the cantilever structure, This can be understood based on the general cantilever beam theory, and will not be repeated here.

In addition, in this embodiment, the seat body 182 is a hollow structure, which includes an upper cover 1822 and a lower seat 1824 , and the upper cover 1822 is connected with the lower seat 1824 (for example, through a buckle or a slot connection) to form an accommodating space 1826 . The upper cover 1822 and the lower seat 1824 clamp and fix the magnetic member 184 . The trigger bracket 186 is disposed in the accommodating space 1826 and its pressing portion 1862 protrudes from the upper cover 1822 (or base 182 ) toward the keycap 12 from the through hole 1822a of the upper cover 1822 . The pushing part 1866 and the first magnetic attraction part 1864 are located in the accommodating space 1826 . The conducting bracket 188 is disposed in the accommodating space 1826 . The first electrical terminal 190 and the second electrical terminal 192 (for example, clamped by the upper cover 1822 and the lower seat 1824 and/or fixed to the lower seat 1824 by embedding and injection with the lower seat 1824) extend from the accommodating space 1826 Out of the seat body 182. In this way, the seat body 182 can provide protection for the components accommodated therein, and also provide a certain degree of dust-proof effect for the electrical terminals 190, 192, which is helpful for maintaining the conduction resistance between the electrical terminals 190, 192, and also helps The service life of the switch 18 is improved. In actual operation, the role of the seat body 182 is not limited to protection and dust prevention, so even if the seat body 182 is made of a frame structure, it only needs to have a structure for fixing the magnetic attraction 184, the trigger bracket 186 and the conduction bracket The rotatably connected structure of 188 and the fixed structure of the electrical terminals 190 and 192 can also exert the effect of the actuation of the aforementioned switch 18 . In addition, in actual operation, the parts of the electrical terminals 190, 192 exposed to the switch 18 can be soldered to the flexible circuit board through the circuit board (for example, the electrical terminals 190, 192 can be arranged between the board body 142 and the base body 182, or disposed under the board body 142 ) or wires to be electrically connected to a controller (such as a controller of a keyboard including a plurality of key structures 1 ).

In addition, in this embodiment, the trigger bracket 186 is rotatably set relative to the base body 182 with its first end 1868 as a fulcrum, and further, the trigger bracket 186 is rotatably set on the upper cover 1822 through the first end 1868 The slot 1822b is pivotally connected with the upper cover 1822 . The first magnetic attraction part 1864 is located between the first end part 1868 and the pressing part 1862 and is located below the fixed magnetic attraction part 184 . The conduction bracket 188 is located between the trigger bracket 186 and the upper cover 1822 and is rotatable relative to the base body 182 with its second end 1888 as a fulcrum, so that the contact portion 1882 and the second resisting portion 1886 can be connected with the trigger bracket 186. Wherein, in actual operation, the second end portion 1888 may abut against the inner surface of the upper cover 1822 and/or abut against the fixed magnetic element 184 due to the second magnetic attraction force F2. The second magnetic portion 1884 is located between the second end portion 1888 and the contact portion 1882 and above the fixed magnetic portion 184 . The contact portion 1882 is located above the first electrical terminal 190 . Based on the configuration of the aforementioned components, from the perspective of FIG. 5 or FIG. 6 , the first magnetic attraction force F1 drives the trigger bracket 186 to rotate counterclockwise, and the second magnetic attraction force F2 also drives the conduction bracket 188 to rotate counterclockwise. Wherein, in actual operation, the arrangement of the first resisting portion 1866 and the second resisting portion 1886 is enough to push against each other, and is not limited to the arrangement and structure shown in the figure.

In addition, in this embodiment, the first electrical terminal 190 and the second electrical terminal 192 are adjacently arranged and are both arranged relative to the contact portion 1882, so the contact portion 1882 contacts the second electrical terminal 190 while contacting the second electrical terminal 190. Terminal 192. In this embodiment, the contact portion 1882 is conductive, so when the keycap 12 moves toward the bottom plate 14 to press the pressing portion 1862, the second magnetic attraction force F2 drives the conduction bracket 188 to rotate to the fixed magnetic element 184, so that the contact portion 1882 Simultaneously contact the first electrical terminal 190 and the second electrical terminal 192 to conduct the first electrical terminal 190 and the second electrical terminal 192 . In actual operation, the fixed magnetic member 184 can be a magnet, the conductive bracket 188 can be a paramagnetic metal part (for example, a paramagnetic metal plate, formed by stamping), and the conductive bracket 188 corresponds to the position of the fixed magnetic member 184 That is, it can be used as the second magnetic attraction part 1884 , and at this time, the conduction bracket 188 as a whole is both conductive and magnetically attractive. Moreover, in actual operation, the conductive support 188 can only form a conductive structure on the contact portion 1882, for example, by coating the surface of the contact portion 1882 with a conductive layer (such as electroplating, electroless plating, etc.), and for example A metal part is used as the contact part 1882 in the way of embedding and injection (and a paramagnetic metal part or magnet is used as the second magnetic attraction part 1884, and other parts of the conduction bracket 188 are still plastic parts).

Similarly, the trigger bracket 186 can also be a paramagnetic metal piece (for example, formed by stamping from a paramagnetic metal plate), and is bent at one end 1862a of the paramagnetic metal piece (for example, protruding through the through hole 1822a). part) is covered with a plastic cover 1862b as the pressing part 1862. Moreover, the trigger bracket 186 may include a spring 1862c (shown in dotted line in FIG. 4 ), abutted between the plastic cover 1862b and the end portion 1862a, so that when the keycap 12 moves toward the bottom plate 14 to press the pressing portion 1862, Plastic cover 1862a compresses spring 1862c. The elastic deformation of the spring 1862c can provide an additional pressing stroke of the keycap 12, and the resilience of the spring 1862c also contributes to the user's pressing feel. In addition, the trigger bracket 186 can also be fabricated in a manner similar to the method of forming the conduction bracket 188 by embedding and injection, so no further description is given.

In addition, in actual operation, the button structure 1 may further include an auxiliary magnetic piece 194 (shown in dotted line in FIG. 4 ) corresponding to the fixed magnetic piece 184 and arranged on the conductive bracket 188 to strengthen the fixed magnetic piece 184 against Conduction bracket 188 has the ability of magnetic attraction. Similarly, the button structure 1 may further include an auxiliary magnetic piece 196 (shown in dotted line in FIG. 4 ) corresponding to the fixed magnetic piece 184 disposed on the trigger bracket 186 to strengthen the magnetic attraction of the fixed magnetic piece 184 to the trigger bracket 186. Ability.

Please refer to Fig. 7 to Fig. 11, Fig. 7 is the schematic diagram of the partial explosion of the button structure of the second embodiment; Fig. 8 is the schematic diagram of partial explosion of the switch in Fig. 7; Fig. 9 is the exploded diagram of the switch in Fig. 7; Fig. 10 is the diagram 8 is a cross-sectional view of the switch along line Y-Y; FIG. 11 is a cross-sectional view of the switch in FIG. 10 when the pressing part of its trigger bracket is pressed. The key structure 3 of the second embodiment is similar in structure to the key structure 1, so the component symbols of the key structure 1 are used. The main difference between the key structure 3 and the key structure 1 is that the trigger bracket 386 and the conduction bracket 388 of the switch 38 of the key structure 3 adopt different structural configurations to realize the triggering of the switch 38 . However, in the switch 38 , the actuation logic of pushing between the trigger bracket 386 and the conduction bracket 388 is still the same as that of the trigger bracket 186 and the conduction bracket 188 in the switch 18 . Therefore, for other descriptions of the components of the key structure 3, please refer to the relevant descriptions of the same-named components in the key structure 1 and the descriptions of their changes, and no further details are given.

In this embodiment, the trigger bracket 386 of the switch 38 has a bent portion 3868 . The bending portion 3868 is located between the first resisting portion 3866 and the first magnetic attraction portion 3864 of the trigger bracket 386 . The trigger bracket 386 is rotatable relative to the seat body 382 of the switch 38 with the bent portion 3868 as a fulcrum; precisely, in this embodiment, the trigger bracket 386 is the edge of the seat body 382 that contacts the bent portion 3868 Rotate to rotate the fulcrum of the connecting part, but it is not limited to this in actual operation. For example, the edge of the bent part 3868 is not implemented with a sharp edge, but is made with a small rounded structure, and the structure is still visible logically As an edge, the seat body 382 contacts the edge of the bending part 3868 with a plane (ie, the inner surface). When the trigger bracket 386 rotates relative to the seat body 382, the edge of the bending part 3868 abuts against the plane and rotates. At this time On the whole, the trigger bracket 386 still rotates relative to the seat body 382 by the edge of the bent portion 3868 . The first magnetic portion 3864 is located between the bending portion 3868 and the pressing portion 3862 of the trigger bracket 386 and is located below the fixed magnetic portion 184 of the switch 38 . The conducting bracket 388 is rotatable relative to the base body 382 with its end 3888 as a fulcrum. The second magnetic portion 3884 of the conductive bracket 388 is located between the end portion 3888 and the contact portion 3882 of the conductive bracket 388 and is located below the fixed magnetic component 184 . From the perspective of FIG. 10 or FIG. 11 , the projections of the contact portion 3882 of the conductive support 388 and the second resisting portion 3886 overlap, so the position of the second resisting portion 3886 can also be read as the contact portion 3882 in the figure. s position. The first magnetic attraction force F1 (indicated by double arrows in FIG. 10 and FIG. 11 ) generated between the first magnetic attraction part 3864 and the fixed magnetic attraction part 184 drives the trigger bracket 386 to rotate clockwise, and the second magnetic attraction part 3884 and the fixed magnetic attraction part 184 The second magnetic attraction force F2 (shown by double arrows in FIG. 10 and FIG. 11 ) generated between the magnetic attractors 184 drives the conduction support 388 to rotate counterclockwise, and the first resisting portion 3866 and the second contact of the conduction support 388 The push parts 3886 are oppositely arranged. The contact portion 3882 is located below the first electrical terminal 190 and the second electrical terminal 192 of the switch 38 . When the pressing part 3862 is not pressed (for example, not pressed by the keycap 12), the moment generated by the first magnetic attraction force F1 on the trigger support 386 is greater than the moment produced by the second magnetic attraction force F2 on the conduction support 388, so as shown in FIG. 10 As shown, the first magnetic attraction force F1 drives the trigger bracket 386 to rotate toward the fixed magnetic element 184, so that the trigger bracket 386 pushes against the second resisting portion 3886 via the first resisting portion 3866 so that the conduction bracket 388 rotates away from the fixed magnetic element. 384 makes the contact portion 3882 away from the first electrical terminal 190; in other words, the first electrical terminal 190 and the second electrical terminal 192 are not conducted (or not electrically connected), that is, the switch 38 is not triggered. Also, as shown in FIG. 11 , when the keycap 12 moves toward the bottom plate 14 to press the pressing portion 3862 (for example, the keycap 12 is pressed by the user so that the lower surface of the cap body 122 contacts and presses the pressing portion 3862 downward), the bracket 386 is triggered. Restrained by an external force (that is, the pressing force on the pressing part 3862), the first magnetic attraction force F1 is overcome by the external force, the trigger bracket 386 is rotated away from the fixed magnetic attraction piece 184, and the second magnetic attraction force F2 drives the second resistance of the conduction bracket 388 The portion 3886 continues to abut against the first resisting portion 3866 , and also drives the conducting bracket 388 to rotate to fix the magnetic member 184 .

When the pressing portion 3862 is pressed to a set distance (as shown in FIG. 11 ), the contact portion 3882 (see also FIG. 9 ) simultaneously contacts the first electrical terminal 190 and the second electrical terminal 192 to conduct the first electrical terminal 190 and the second electrical terminal 192. The second electrical terminal 192 ; in other words, the first electrical terminal 190 is electrically connected to the second electrical terminal 192 , that is, the switch 38 is triggered. When the pressing part 3862 is continuously pressed, the contact part 3882 keeps in contact with the first electrical terminal 190 to conduct the first electrical terminal 190 and the second electrical terminal 192; and the first resisting part 3866 is separated from the second resisting part 3886, and The contact portion 3882 is kept in contact with the first electrical terminal 190 by the second magnetic attraction force F2.

In addition, in this embodiment, the seat 382 is composed of the body 3820 and the paramagnetic metal part 3821, so that the overall structure of the seat 382 is similar to the structure of the upper cover 1822, wherein the fixed magnetic member 184 is arranged on the opposite side of the body 3820. Between the two side walls and the paramagnetic metal part 3821, the fixed magnetic part 184 is exposed inside the main body 3820, and other components of the switch 38 can be stably arranged on the seat body 382, so the seat body 382 does not need to have the aforementioned lower seat 1824 structure, but it is not limited to this in actual operation. For example, the seat body 382 is made of a single component (such as a plastic injection part), and the fixed magnetic attraction part 184 is fixed on the seat body 382 (for example, by snapping, gluing, etc.). Moreover, for example, the seat body 382 may also include a structure similar to the above-mentioned lower seat 1824 to improve component protection and dustproof effects. In this embodiment, the seat body 382 has a groove 3822 , the groove 3822 opens downward and forms a receiving space 3824 . The conducting bracket 388 is disposed in the accommodating space 3824 . The bending portion 3868 , the first resisting portion 3866 and the first magnetic portion 3864 of the trigger bracket 386 are located in the accommodating space 3824 , and the pressing portion 3862 of the trigger bracket 386 protrudes from the through hole 3826 of the base body 382 . The first electrical terminal 190 and the second electrical terminal 192 protrude from the seat body 382 from the accommodating space 3824 (eg, manufactured by embedding and injection molding). The first resisting portion 3866 is located between the second resisting portion 3886 and the seat body 382 . The trigger bracket 386 has an opening 3870 through which the conduction bracket 388 passes.

In the foregoing embodiments, the conduction between the first electrical terminal 190 and the second electrical terminal 192 in the switches 18, 38 is through the conductive contact portion 1882, 3882 simultaneously contacting the first electrical terminal 190 and the second electrical terminal 192 and realized, but it is not limited to this in actual operation. For example, the first electrical terminal 190 and the second electrical terminal 192 are vertically spaced apart, and the contact portions 1882, 3882 are arranged on the other side of the first electrical terminal 190 relative to the second electrical terminal 192, so that the contact portions 1882, 3882 can be Drive to contact and push against the first electrical terminal 190 so that the first electrical terminal 190 and the second electrical terminal 192 directly contact each other for conduction; in this example, the contact portions 1882 and 3882 do not need to be conductive.

In addition, in the foregoing embodiments, before the switches 18, 38 are triggered, the second electrical terminal 192 is separated from the contact portion 1882, 3882, but in practice, the second electrical terminal 192 can also be separated from the contact portion 1882. , 3882 are electrically connected before the switches 18, 38 are triggered, and when the contact parts 1882, 3882 contact the first electrical terminal 190, the second electrical terminal 192 can be connected to the first electrical terminal 190 via the contact parts 1882, 3882 Electrically connected to realize conduction between the first electrical terminal 190 and the second electrical terminal 192 .

Please refer to Fig. 12 to Fig. 16, Fig. 12 is the schematic diagram of the partial explosion of the button structure of the third embodiment; Fig. 13 is the schematic diagram of the partial explosion of the switch in Fig. 12; Fig. 14 is the exploded view of the switch in Fig. 12; Fig. 15 is the diagram 13 is a cross-sectional view of the switch along line Z-Z; FIG. 16 is a cross-sectional view of the switch in FIG. 15 when the pressing part of its trigger bracket is pressed. The key structure 4 of the third embodiment is similar in structure to the key structure 1, so the component symbols of the key structure 1 are used. The main difference between the key structure 4 and the key structure 1 is that the conduction bracket 488 of the switch 48 of the key structure 4 conducts the first electrical terminal 190 and the second electrical terminal 492 in different ways to trigger the switch 48 . However, in the switch 48 , the pushing action between the trigger bracket 186 and the conductive bracket 488 is substantially the same as that of the trigger bracket 186 and the conductive bracket 188 in the switch 18 . Therefore, for other descriptions of the components of the key structure 4, please refer to the relevant descriptions of the same-named components in the key structure 1 and the descriptions of their changes, and no further details are given.

In this embodiment, the contact portion 4882 of the conduction bracket 488 is only disposed opposite to the first electrical terminal 190, and the second electrical terminal 492 is fixedly connected to the other side of the conduction bracket 488 opposite to the contact portion 4882 and is in contact with the contact portion. 4882 is electrically connected via lead-through 488 . Wherein, the conduction bracket 488 can be provided with a cantilever structure 4883 with a certain degree of deformation and elastic characteristics through proper design of the structure, providing the conduction bracket 488 with a cantilever elastic force that makes the contact part 4882 rotate to the fixed magnetic attraction part 184; when the pressing part 1862 is not pressed When pressed (for example, not pressed by the keycap 12), the moment generated by the first magnetic attraction force F1 on the trigger bracket 186 is greater than the elastic force of the cantilever structure 4883 of the conduction bracket 488, so as shown in FIG. 15, the first magnetic attraction force F1 drives the trigger bracket. 186 rotates to fix the magnetic attraction 184, so that the trigger bracket 186 pushes against the second resisting part 4886 via the first resisting part 1866, and the cantilever structure 4883 produces a relatively large elastic deformation (to simplify the figure, it is still drawn as a straight line in the figure middle), the contact portion 4882 is rotated away from the fixed magnetic member 184 so that the contact portion 4882 is away from the first electrical terminal 190; That is, switch 48 is not activated. Thereby, when the pressing part 1862 of the trigger bracket 186 is pressed, the first magnetic attraction force F1 generated between the first magnetic attraction part 1864 and the fixed magnetic attraction part 184 is overcome by the external force pressing the pressing part 1862, and the trigger bracket 186 is rotated away. The magnetic attraction piece 184 is fixed, the cantilever elastic force of the cantilever structure 4883 of the conductive support 488 drives the first resisting part 1866 to continuously contact the second resisting part 4886 of the conductive support 488, the elastic deformation of the cantilever structure 4883 is reduced, and the contact part 4882 rotates To fix the magnetic piece 184.

When the pressing part 1862 is pressed to the set position, the conductive bracket 488 contacts the first electrical terminal 190 through the contact part 4882 to conduct the first electrical terminal 190 and the second electrical terminal 492, and the cantilever structure 4883 of the conductive bracket 488 Maintaining a moderate deformation elastic force provides contact force between the contact portion 4882 and the first electrical terminal 190 , and the first resisting portion 1866 and the second resisting portion 4886 begin to separate, as shown in FIG. 16 . When the pressing part 1862 continues to press down, the first resisting part 1866 is completely separated from the second resisting part 4886, and the cantilever structure 4883 of the conductive bracket 488 continues to maintain the set cantilever deformation elastic force to continuously drive the contact part 4882 to keep in contact with the second resisting part 4886. An electrical terminal 190 , the contact force of the contact portion 4882 contacting the first electrical terminal 190 at this time depends on the cantilever deformation elastic force of the cantilever structure 4883 , and has nothing to do with the pressing force of the pressing portion 1862 .

In this embodiment, the contact force between the contact portion 4882 and the first electrical terminal 190 is not only the cantilever deformation elastic force of the cantilever structure 4883, but also an auxiliary magnetic attraction can be further selected on the conductive support 488 corresponding to the fixed magnetic attraction 184. The sheet 194 assists the conduction contact force requirement between the contact portion 4882 and the first electrical terminal 190 through the magnetic attraction force F2 between the two.

In addition, in this embodiment, the conduction bracket 488 and the second electrical terminal 492 are integrally formed (for example, formed by stamping from a paramagnetic metal plate), but it is not limited to this in actual operation, for example, the conduction bracket 488 The second electrical terminal 492 and the second electrical terminal 492 are two components, which are fixedly connected together through welding or a snap-fit structure. Also, in actual operation, the conduction support 488 and the second electrical terminal 492 can also be in contact (for example, the end of the conduction support 488 abuts against the second electrical terminal 492), which is realized before the switch 48 is triggered. The conduction bracket 488 is electrically connected to the second electrical terminal 492 . In addition, in this embodiment, the upper cover 4822 and the lower seat 4824 of the base body 482 of the switch 48 are engaged to form an accommodating space 4826 for accommodating other components of the switch 48 . The upper cover 4822 and the lower seat 4824 hold the integrated structure of the conduction bracket 488 and the second electrical terminal 492 at the same time, so that it acts like a cantilever structure. Under the action of the second magnetic attraction force F2 (for example, the second magnetic attraction force F2 is sufficient to deflect the conduction support 488), the conduction support 488 can be fixed relative to the base 482 with the side opposite to the contact portion 4882 as a fixed end. Deflects towards the fixed magnet 184 . This deflection effect is equivalent to the effect of the conduction support 188, 388 rotating relative to the seat body 182, 382 under the action of the second magnetic attraction force F2 in the foregoing, and both can make the conduction support 188, 388 relative to the seat body 182, 382 The direction of the structure (or orientation) changes, so in the switches 18 and 38, the conduction brackets 188 and 388 can also be implemented with a cantilever structure; similarly, in the switches 18 and 38, the trigger bracket 186 can also adopt a cantilever structure practice. In addition, in this article, rotation or deflection all mean to change the structural direction (or orientation) of the components, so when understanding the embodiments described herein, the rotation of trigger brackets 186, 386 and conduction brackets 188, 388, 488 The action of turning toward or away includes the situation of rotation or deflection depending on the actual structural configuration, and different words are not used to separate the description.

To sum up, when the button structure of the present invention is actuated, because the pressing force on the keycap has nothing to do with the force that triggers the switch contacts (that is, the electrical terminals), it has the effect of protecting the contacts, so that the service life of the switch will be extended. The service life of the mechanical switch is longer than that of the prior art, so that the service life of the key structure is also longer than that of the key structure of the prior art.

Certainly, the present invention also can have other various 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 (15)

1. A button structure, comprising: keycap; the bottom plate is arranged under the key cap; A lifting mechanism is correspondingly arranged between the base plate and the keycap, and the keycap can move up and down relative to the base plate through the lifting mechanism; and The switch includes a base, a fixed magnetic attraction, a trigger bracket, a conduction bracket, a first electrical terminal, and a second electrical terminal. The base is fixed below the keycap relative to the bottom plate. The fixed magnetic attraction, the The first electrical terminal and the second electrical terminal are fixedly arranged on the base body, the trigger bracket and the conduction bracket are rotatably or deflectably arranged on the base body, the trigger bracket has a pressing part, a first magnetic The suction part and the first push part, the pressing part protrudes from the base and is located under the keycap, a first magnetic force is generated between the first magnetic part and the fixed magnetic part, and the conduction bracket has a contact portion and a second resisting portion, the contact portion is disposed opposite to the first electrical terminal, and the first resisting portion is disposed opposite to the second resisting portion; Wherein, when the pressing part is not pressed, the first magnetic force drives the trigger bracket to rotate to the fixed magnetic part, so that the trigger bracket pushes against the second pushing part through the first pushing part so that the The conductive bracket is rotated away from the fixed magnetic attraction so that the contact portion is away from the first electrical terminal; Wherein, when the keycap moves toward the bottom plate to press the pressing portion to the set position, the first resisting portion is separated from the second resisting portion, and the contact portion contacts the first electrical terminal to conduct the second electrical terminal. An electrical terminal and the second electrical terminal. 2. The button structure according to claim 1, wherein the contact portion is conductive, the conduction bracket has a second magnetic attraction portion, and a second magnetic attraction portion is formed between the second magnetic attraction portion and the fixed magnetic attraction member. Magnetic attraction force, when the keycap moves toward the bottom plate to press the pressing part to the set position, the second magnetic attraction force drives the conduction bracket to rotate to the fixed magnetic attraction part, so that the contact part contacts the first electric terminal to connect the first electrical terminal and the second electrical terminal. 3. The button structure according to claim 1, wherein the contact portion is conductive, the second electrical terminal is fixedly connected to the conduction bracket and is electrically connected to the contact portion, and the conduction bracket has an elastic cantilever structure , when the keycap moves toward the bottom plate to press the pressing part to the set position, the elastic cantilever structure of the conducting bracket is elastically deformed, so that the contact part contacts the first electrical terminal to conduct the first electrical terminal and the second electrical terminal. 4 . The button structure according to claim 3 , further comprising an auxiliary magnetic attraction piece disposed on the conductive support corresponding to the fixed magnetic attraction piece. 5 . 5. The button structure according to claim 1, wherein when the contact portion contacts the first electrical terminal to conduct the first electrical terminal and the second electrical terminal, the first resisting portion and the second electrical terminal The second propulsion part separates. 6. The button structure according to claim 1, wherein the trigger bracket is rotatably set relative to the base with its first end as a fulcrum, and the first magnetic attraction part is located between the first end and Between the pressing parts and below the fixed magnetic attraction part, the conduction support is rotatable relative to the base with its second end as a fulcrum, the conduction support has a second magnetic attraction part, and the second magnetic support The suction part is located between the second end part and the contact part and above the fixed magnetic part. 7. The button structure according to claim 6, wherein the seat body comprises an upper cover and a lower seat, the upper cover and the lower seat are connected to form an accommodating space, and the upper cover and the lower seat clamp the fixed The magnetic attraction part, the conduction bracket is arranged in the accommodating space, the first end part, the first resisting part and the first magnetic attraction part are located in the accommodating space, the first electrical terminal and the second electrical terminal Two electrical terminals protrude from the seat body from the accommodating space, and the contact portion is located above the first electrical terminal. 8 . The button structure according to claim 7 , wherein the trigger bracket is pivotally connected to the upper cover via the first end, and the conductive bracket is located between the trigger bracket and the upper cover. 9. The button structure according to claim 1, characterized in that, the trigger bracket has a rotating connection part, and the rotation connecting part is located between the first resisting part and the first magnetic attraction part, and the trigger bracket uses the The rotating connection part is a fulcrum that can rotate relative to the base, the first magnetic attraction part is located between the rotating connection part and the pressing part and is located below the fixed magnetic attraction part, and the end of the conductive bracket is used as a fulcrum It is rotatable relative to the base and is located under the fixed magnetic attraction. 10. The button structure according to claim 9, wherein the base body has a groove, the opening of the groove faces downward and forms an accommodating space, the conducting bracket is arranged in the accommodating space, and the bent part, the first resisting part and the first magnetic attraction part are located in the accommodating space, the first electrical terminal and the second electrical terminal protrude from the seat body in the accommodating space, and the contact part is located in the accommodating space Below the first electrical terminal. 11. The button structure according to claim 10, wherein the first resisting portion is located between the second resisting portion and the base. 12. The button structure according to claim 10, wherein the trigger bracket has an opening, and the conduction bracket passes through the opening. 13. The button structure according to claim 1, wherein the fixed magnetic member is a magnet, and the conducting bracket is a paramagnetic metal member. 14. The button structure according to claim 1, wherein the trigger bracket comprises a paramagnetic metal part and a plastic cover, and the plastic cover is sleeved on one end of the paramagnetic metal part as the pressing part. 15. The button structure according to claim 14, wherein the trigger bracket includes a spring abutted between the plastic cover and the end, and when the keycap moves toward the bottom plate to press the pressing part, The plastic cover compresses the spring.