Key switch device and keyboard

Abstract

The utility model belongs to the technical field of keyboard, specifically relates to key switch device and keyboard, this key switch device, including base, upper shell, axle core and membrane switch, the upper shell is buckled on base, the axle core is set up in the upper shell telescopically, be provided with first contact terminal and second contact terminal on the base, the membrane switch is set up in the cavity formed between the lower side of base or the upper shell and the base, be provided with electric contact on the membrane switch, be provided with pressing structure in the cavity, when the axle core contracts in the cavity, the pressing structure and the electric contact abut, the electric contact conduction first contact terminal and second contact terminal, the membrane switch has no spring piece's rebound problem, the on-off of electric contact and the shaking of spring piece have no direct contact, effectively make the on-off of electric contact not be influenced by shaking, avoid the problem that the electric signal produced because of spring piece shaking is unstable.

Description

Technical Field

[0001] This utility model belongs to the field of keyboard technology, specifically relating to a key switch device and a keyboard. Background Technology

[0002] A mechanical keyboard is a type of keyboard. Structurally, each key on a mechanical keyboard has an individual switch to control its closure. This switch is also called a "switch". According to the classification of microswitches, mechanical keyboards can be divided into brown switches, blue switches, white switches, black switches, and red switches.

[0003] Currently, existing mechanical axis switches all include an interconnected upper and lower cover, and a switch shaft located within the upper and lower covers that can move up and down. The upper and lower covers also contain positive and negative spring contacts. On the circuit board, corresponding to each mechanical axis switch, there are positive circuit solder points soldered to the positive spring contacts and negative circuit solder points soldered to the negative spring contacts. Before pressing, the switch shaft abuts against the positive spring contact, the contacts of the positive and negative spring contacts are not in contact, and the positive and negative circuit solder points on the circuit board are disconnected, so keyboard input is not possible. When pressed, the positive spring contact avoids abutting against the switch shaft, the contacts of the positive and negative spring contacts make contact, and the positive and negative circuit solder points on the circuit board are connected, allowing keyboard input. When the press is released, the switch shaft, under the pressure of the first spring, quickly returns to its highest point, returning to its original stationary state. This process repeats continuously.

[0004] However, during the pressing process, the spring is prone to jitter. Spring jitter refers to the unexpected multiple physical rebounds of the spring during contact due to its own elasticity and material properties at the moment the button is triggered, causing the switch to intermittently switch on and off for a very short time. This jitter can cause instability in the electrical signal, resulting in a perceptible delay in button response, or even misjudgment or signal loss. Utility Model Content

[0005] The purpose of this utility model is to provide a push-button switch device to address the shortcomings of the existing technology. This device solves the technical problem that in the existing mechanical shaft switch, the spring is prone to jitter during the pressing process, which leads to unstable electrical signals, noticeable delay in button response, and even misjudgment or signal loss.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, this utility model provides a push-button switch device, including a base, an upper shell, a shaft, and a membrane switch. The upper shell is fastened to the base, and the shaft is retractably disposed on the upper shell. The base is provided with a first contact terminal and a second contact terminal. The membrane switch is disposed below the base or within a cavity formed between the upper shell and the base. The membrane switch is provided with an electrical contact. A pressing structure is provided within the cavity. When the shaft retracts into the cavity, the pressing structure abuts against the electrical contact, and the electrical contact connects the first contact terminal and the second contact terminal.

[0008] In some embodiments, the membrane switch and the pressing structure are perpendicular to each other.

[0009] In some embodiments, when the membrane switch is disposed within the cavity, the membrane switch is arranged parallel to the bottom wall of the base;

[0010] Alternatively, the membrane switch may be arranged perpendicularly to the bottom wall of the base.

[0011] In some embodiments, the membrane switch includes a first thin-film circuit layer, a second thin-film circuit layer, and an isolation layer. From the upper shell to the base, the first thin-film circuit layer, the isolation layer, and the second thin-film circuit layer are stacked sequentially. The isolation layer has a through hole. The electrical contact includes a first contact portion and a second contact portion. The first contact portion is located on the first thin-film circuit layer, and the second contact portion is located on the second thin-film circuit layer. The first contact portion and the second contact portion correspond to the position of the through hole. When the pressing structure abuts against the electrical contact, the first contact portion and the second contact portion are electrically connected.

[0012] In some embodiments, the second contact portion includes a first portion and a second portion, one end of the first portion and one end of the second portion are spaced apart, one end of the first portion and one end of the second portion correspond to the position of the through hole, the other end of the first portion extends away from the second portion and is connected to the first contact terminal, and the other end of the second portion extends away from the first portion and is connected to the second contact terminal.

[0013] In some embodiments, the thickness P of the isolation layer and the thickness M of the first thin-film circuit layer satisfy the relationship: P≤M;

[0014] And / or, the thickness P of the isolation layer and the thickness N of the second thin-film circuit layer satisfy the relationship: P≤N.

[0015] In some embodiments, the pressing structure includes a main body and a pressing part, the main body being connected to the first contact terminal or the shaft core, and the pressing part being disposed on the side of the main body facing the membrane switch;

[0016] Wherein, at least one of the main body and the pressing part is a first elastic element;

[0017] Alternatively, the main body and the pressing part can be connected to form a telescopic structure.

[0018] In some embodiments, when the main body and the pressing part are connected to form a telescopic structure, one of the main body and the pressing part is a sleeve, a second elastic element is provided inside the sleeve, and the other of the main body and the pressing part is connected to the second elastic element;

[0019] Alternatively, a third elastic element may be connected between the main body and the pressing part.

[0020] Secondly, this utility model provides a keyboard, including an upper cover, a bottom cover, a circuit board, a cap, and a key switch device as described in the above embodiment. The upper cover has an opening and is disposed on the bottom cover. An installation space is formed between the upper cover and the bottom cover. The circuit board is disposed in the installation space. The key switch device is disposed on one side of the circuit board. The end of the shaft away from the base protrudes from the opening and is connected to the cap.

[0021] Both the first contact terminal and the second contact terminal are soldered to the circuit board;

[0022] Alternatively, a plug-in socket is provided on the other side of the circuit board, and both the first contact terminal and the second contact terminal pass through the circuit board and are pluggably connected to the plug-in socket.

[0023] In some embodiments, the membrane switch includes a first thin-film circuit layer, a second thin-film circuit layer, and an isolation layer. From the upper shell to the base, the first thin-film circuit layer, the isolation layer, and the second thin-film circuit layer are stacked sequentially. The isolation layer has a through hole. The electrical contact includes a first contact portion and a second contact portion. The first contact portion is located on the first thin-film circuit layer, and the second contact portion is located on the second thin-film circuit layer. The first contact portion and the second contact portion correspond to the position of the through hole. The second thin-film circuit layer is the circuit board.

[0024] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0025] This utility model's push-button switch device utilizes a base, upper shell, shaft, and membrane switch in conjunction. The upper shell is fastened to the base, and the shaft is retractably mounted on the upper shell. The base has a first contact terminal and a second contact terminal. When the shaft is pressed, it retracts into a cavity, and the pressing structure within the cavity abuts against the electrical contacts of the membrane switch, triggering the electrical contacts. This connects the first and second contact terminals, allowing the circuit board to receive signals and input keyboard functions. When the pressure on the shaft is released, it resets, and the pressing structure within the cavity separates from the electrical contacts of the membrane switch, disconnecting the electrical contacts and breaking the connection between the first and second contact terminals. This effectively realizes the switching function of the push-button switch device. Furthermore, the membrane switch itself eliminates the spring-loaded rebound problem, and during the pressing and releasing of the shaft, the on / off state of the electrical contacts is not directly affected by spring vibration. This effectively prevents the on / off state of the electrical contacts from being affected by vibration, avoiding the problem of unstable electrical signals caused by spring vibration, thereby improving the response time of the input signal.

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the keyboard structure of this utility model.

[0029] Figure 2 This is a cross-sectional view of the keyboard of this utility model.

[0030] Figure 3 This is a schematic diagram of the push-button switch device of this utility model.

[0031] Figure 4 This is a front view of the push-button switch device of this utility model.

[0032] Figure 5 This is a cross-sectional view of the push button switch device of this utility model.

[0033] Figure 6 This is an exploded view of the push-button switch device of this utility model.

[0034] Figure 7 This is another exploded view of the push-button switch device of this utility model.

[0035] Figure 8 This is another cross-sectional view of the push button switch device of this utility model.

[0036] Figure 9 This is a schematic diagram of the structure of the membrane switch of this utility model.

[0037] Figure 10 This is an exploded view of the membrane switch of this utility model.

[0038] Figure 11 This is another exploded view of the membrane switch of this utility model.

[0039] Figure 12 This is a schematic diagram of the circuit board structure of this utility model.

[0040] The reference numerals in the attached figures are explained as follows:

[0041] 100. Keyboard;

[0042] 101. Pushbutton switch device; 102. Top cover; 103. Bottom cover; 104. Circuit board; 105. Cap; 106. Opening; 107. Installation space; 108. Socket; 109. Gasket;

[0043] 10. Base; 11. First contact terminal; 12. Second contact terminal; 13. Positioning post; 14. Guide groove;

[0044] 20. Top shell;

[0045] 30. Shaft core; 31. Guide post;

[0046] 40. Membrane switch; 41. Electrical contact; 411. First contact portion; 412. Second contact portion; 4121. First part; 4122. Second part; 42. First thin film circuit layer; 43. Second thin film circuit layer; 44. Insulating layer; 441. Through hole;

[0047] 50. Cavity;

[0048] 60. Pressing structure; 61. Main body; 62. Pressing part; 63. Second elastic element;

[0049] 70. Compression spring. Detailed Implementation

[0050] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0051] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] The following will be combined with the appendix Figures 1-12 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0054] Please see Figures 1-12 The keyboard 100 of this utility model embodiment includes an upper cover 102, a bottom cover 103, a circuit board 104, a cap 105, and a key switch device 101. The upper cover 102 is provided with an opening 106 and covers the bottom cover 103. An installation space 107 is formed between the upper cover 102 and the bottom cover 103. The circuit board 104 is disposed in the installation space 107. The key switch device 101 is disposed on one side of the circuit board 104. The end of the shaft core 30 away from the base 10 passes through the opening 106 and is connected to the cap 105.

[0055] Please see Figures 1-12The push-button switch device 101 of this utility model embodiment includes a base 10, an upper shell 20, a shaft core 30, and a membrane switch 40. The upper shell 20 is fastened to the base 10, and the shaft core 30 is telescopically disposed on the upper shell 20. The base 10 is provided with a first contact terminal 11 and a second contact terminal 12. The membrane switch 40 is disposed below the base 10 or in a cavity formed between the upper shell 20 and the base 10. The membrane switch 40 is provided with an electrical contact 41, and a pressing structure 60 is provided in the cavity. When the shaft core 30 retracts into the cavity, the pressing structure 60 abuts against the electrical contact 41, and the electrical contact 41 conducts the first contact terminal 11 and the second contact terminal 12.

[0056] Compared with the prior art, the push-button switch device 101 of this utility model uses the cooperation of a base 10, an upper shell 20, a shaft core 30, and a membrane switch 40. The upper shell 20 is fastened to the base 10, and the shaft core 30 is telescopically disposed on the upper shell 20. The base 10 is provided with a first contact terminal 11 and a second contact terminal 12. When the shaft core 30 is pressed, the shaft core 30 retracts into the cavity, and the pressing structure 60 in the cavity abuts against the electrical contact 41 of the membrane switch 40, thereby triggering the electrical contact 41. The electrical contact 41 connects the first contact terminal 11 and the second contact terminal 12, connecting the positive and negative terminals of the membrane switch 40. The circuit board 104 receives signals to realize the keyboard 100 function input. When the pressure on the shaft core 30 is released, the shaft core 30 resets, and the pressing structure 60 in the cavity separates from the electrical contact 41 of the membrane switch 40, causing the electrical contact 41 to disconnect. The first contact terminal 11 and the second contact terminal 12 are disconnected, effectively realizing the switching function of the key switch device 101. At the same time, the membrane switch 40 itself does not have the problem of spring rebound, and during the pressing and releasing of the shaft core 30, the opening and closing of the electrical contact 41 is not in direct contact with the spring vibration, effectively making the opening and closing of the electrical contact 41 unaffected by vibration, avoiding the problem of unstable electrical signals caused by spring vibration, thereby improving the response time of the input signal.

[0057] In some embodiments, the membrane switch 40 and the pressing structure 60 are perpendicular to each other. By making the membrane switch 40 and the pressing structure 60 perpendicular to each other, the pressing structure 60 can effectively transmit the downward pressure of the shaft core 30 to the electrical contact 41 of the membrane switch 40 through the most direct path, avoiding lateral force components and friction that may occur during force transmission. This effectively reduces ineffective energy loss and unnecessary wear of components, ensuring consistency of triggering force each time.

[0058] In some embodiments, when the membrane switch 40 is disposed within the cavity, the membrane switch 40 is arranged parallel to the bottom wall of the base 10; or, the membrane switch 40 is arranged perpendicular to the bottom wall of the base 10. When the membrane switch 40 is arranged parallel to the bottom wall of the base 10, since the bottom wall of the base 10 is perpendicular to the extension direction of the shaft core 30, the extension direction of the membrane switch 40 is effectively made perpendicular to the extension direction of the shaft core 30. The pressing structure 60 can directly and vertically press down on the electrical contact 41 of the membrane switch 40, effectively reducing ineffective energy loss and unnecessary wear of components. When the membrane switch 40 is arranged perpendicular to the bottom wall of the base 10, the membrane switch 40 effectively utilizes the side space of the cavity 50, avoiding the height superposition of the push-button switch device 101, thereby effectively improving the space utilization rate of the push-button switch device 101.

[0059] In some embodiments, the membrane switch 40 includes a first thin film circuit layer 42, a second thin film circuit layer 43, and an isolation layer 44. From the upper shell 20 to the base 10, the first thin film circuit layer 42, the isolation layer 44, and the second thin film circuit layer 43 are stacked sequentially. The isolation layer 44 is provided with a through hole 441. The electrical contact 41 includes a first contact portion 411 and a second contact portion 412. The first contact portion 411 is located on the first thin film circuit layer 42, and the second contact portion 412 is located on the second thin film circuit layer 43. The first contact portion 411 and the second contact portion 412 correspond to the positions of the through hole 441. When the pressing structure 60 abuts against the electrical contact 41, the first contact portion 411 and the second contact portion 412 are electrically connected. Through the combined use of the first thin-film circuit layer 42, the second thin-film circuit layer 43, and the isolation layer 44, the isolation layer 44 is disposed between the first thin-film circuit layer 42 and the second thin-film circuit layer 43, and the isolation layer 44 is provided with a through hole 441, effectively ensuring the separation of the first contact portion 411 of the first thin-film circuit layer 42 and the second contact portion 412 of the second thin-film circuit layer 43 under normal conditions, avoiding accidental touches. When the pressing structure 60 applies pressure to the electrical contact 41, the first contact portion 411 and the second contact portion 412 abut against each other, and the positive and negative terminals of the membrane switch 40 are connected. The circuit board 104 receives the signal to realize the function input of the keyboard 100, effectively realizing the switching function of the key switch device 101. At the same time, it can effectively prevent the opening and closing of the electrical contact 41 from being affected by jitter, avoiding the problem of unstable electrical signals caused by spring jitter, thereby improving the response time of the input signal.

[0060] It is understandable that the first thin film circuit layer 42, the second thin film circuit layer 43 and the isolation layer 44 can be formed into an integral sealed structure through lamination process, thereby effectively and tightly wrapping the conductive path. Even if contaminants enter the cavity or installation space 107, they are difficult to penetrate the thin film layer and affect the internal electrical contacts 41, thus ensuring the reliability of the switching function of the push button switch device 101.

[0061] In some embodiments, the second contact portion 412 includes a first portion 4121 and a second portion 4122. One end of the first portion 4121 and one end of the second portion 4122 are spaced apart. One end of the first portion 4121 and one end of the second portion 4122 correspond to the position of the through hole 441. The other end of the first portion 4121 extends away from the second portion 4122 and is connected to the first contact terminal 11. The other end of the second portion 4122 extends away from the first portion 4121 and is connected to the second contact terminal 12. When the pressing structure 60 abuts against the electrical contact 41, the first contact portion 411, one end of the first portion 4121, and one end of the second portion 4122 are electrically connected. Through the cooperative use of the first portion 4121 and the second portion 4122, the first portion 4121 and the second portion 4122 separate and extend in opposite directions from the end corresponding to the first contact portion 411, forming two independent regions. This effectively ensures that when the first contact point and the second contact point are separated, there is no short circuit between the first contact terminal 11 and the second contact terminal 12 connected to the membrane switch 40, thereby preventing the switching function of the push button switch device 101 from failing.

[0062] In some embodiments, the thickness P of the isolation layer 44 and the thickness M of the first thin-film circuit layer 42 satisfy the relationship: P≤M; and / or; the thickness P of the isolation layer 44 and the thickness N of the second thin-film circuit layer 43 satisfy the relationship: P≤N. By effectively reducing the thickness of the isolation layer by P≤M and / or P≤N, the distance between the first contact point of the first thin-film circuit layer 42 and the second contact point of the second thin-film layer is reduced under normal conditions, thereby shortening the trigger stroke of the first contact point and the second contact point. This allows the user to quickly activate the circuit with a shorter and lighter pressing action, greatly reducing the operating force and time.

[0063] In some embodiments, the pressing structure 60 includes a main body 61 and a pressing part 62. The main body 61 is connected to the first contact terminal 11 or the shaft core 30, and the pressing part 62 is disposed on the side of the main body 61 facing the membrane switch 40. At least one of the main body 61 and the pressing part 62 is a first elastic element; or, the main body 61 and the pressing part 62 are connected to form a telescopic structure. Through the cooperative use of the main body 61 and the pressing part 62, where at least one of the main body 61 and the pressing part 62 is a first elastic element, or where the main body 61 and the pressing part 62 are connected to form a telescopic structure, when the pressing structure 60 abuts against the electrical contact 41 of the membrane switch 40, the pressing structure 60 can disperse concentrated stress through compression deformation, making the triggering sensation softer and smoother, avoiding a harsh impact. At the same time, this elastic buffering effect also prevents permanent damage to the fragile thin-film circuit layer caused by excessive pressure from the user, improving the durability of the product.

[0064] In some embodiments, when the main body 61 and the pressing part 62 are connected to form a telescopic structure, one of the main body 61 and the pressing part 62 is a sleeve, and a second elastic member 63 is disposed inside the sleeve. The other of the main body 61 and the pressing part 62 is connected to the second elastic member 63; or, a third elastic member is connected between the main body 61 and the pressing part 62. With the provision of the second elastic member 63 or the third elastic member, the pressing part 62 smoothly contacts the electrical contact 41 of the membrane switch 40 under the push of the elastic member, rather than experiencing a rigid impact. This not only improves the user experience but also prevents damage to the membrane switch 40 due to excessive pressing. Furthermore, by making one of the main body 61 and the pressing part 62 a sleeve, and having the sleeve cooperate with the other component, the pressing part 62 is effectively guided, effectively preventing the pressing part 62 from wobbling or deviating during movement, and ensuring the consistency of the trigger point between different presses.

[0065] It is understood that the first elastic element, the second elastic element 63, and the third elastic element may have the same structure or different structures. The first elastic element, the second elastic element 63, and the third elastic element are one of springs, sheet springs, or soft rubber.

[0066] In some embodiments, both the first contact terminal 11 and the second contact terminal 12 are soldered to the circuit board 104; or, a plug-in socket 108 is provided on the other side of the circuit board 104, and both the first contact terminal 11 and the second contact terminal 12 pass through the circuit board 104 and are pluggably connected to the plug-in socket 108. When both the first contact terminal 11 and the second contact terminal 12 are soldered to the circuit board 104, the connection stability and reliability between the first contact terminal 11 and the second contact terminal 12 and the circuit board 104 are effectively improved, effectively resisting the risk of loosening caused by long-term use or external impact, and ensuring the long-term stability and reliability of signal transmission. When the first contact terminal 11 and the second contact terminal 12 are pluggably connected to the plug-in socket 108 of the circuit board 104, the push-button switch device 101 is pluggably connected to the circuit board 104. When a single push-button switch device 101 fails, it can be replaced individually without soldering, reducing maintenance difficulty and cost. At the same time, users can easily interchange push-button switch devices 101 with different feel to achieve personalized customization.

[0067] It is understood that the first contact terminal 11 and the second contact terminal 12 can be either integrally formed or separate structures. When both the first contact terminal 11 and the second contact terminal 12 are separate structures, each of the first contact terminal 11 and the second contact terminal 12 includes a resilient contact terminal and a fixed contact terminal. The resilient contact terminal is disposed on the shaft core 30, and the fixed contact terminal is disposed on the base 10. The fixed contact terminal passes through the base 10, the membrane switch 40, and is soldered to the circuit board 104; or, the fixed contact terminal passes through the base 10, the membrane switch 40, and the circuit board 104 and is pluggably connected to the socket 108.

[0068] Understandably, one of the fixed contact terminals of the first contact terminal 11 and the second contact terminal 12 is connected to the positive terminal of the membrane switch 40, and the other of the fixed contact terminals of the first contact terminal 11 and the second contact terminal 12 is connected to the negative terminal of the membrane switch 40. That is, the fixed contact terminal of the first contact terminal 11 is connected to the other end of the first portion 4121, and the fixed contact terminal of the second contact terminal 12 is connected to the other end of the second portion 4122.

[0069] In some embodiments, the membrane switch 40 includes a first thin-film circuit layer 42, a second thin-film circuit layer 43, and an isolation layer 44. From the upper shell 20 to the base 10, the first thin-film circuit layer 42, the isolation layer 44, and the second thin-film circuit layer 43 are sequentially stacked. The isolation layer 44 has a through hole 441. The electrical contact 41 includes a first contact portion 411 and a second contact portion 412. The first contact portion 411 is located on the first thin-film circuit layer 42, and the second contact portion 412 is located on the second thin-film circuit layer 43. The first contact portion 411 and the second contact portion 412 correspond to the positions of the through hole 441. The second thin-film circuit layer 43 is a circuit board 104. By using the second thin-film circuit layer 43 as a circuit board 104, the second thin-film circuit layer 43 is effectively integrated directly onto the circuit board 104, making the structure of the push-button switch device 101 more compact and with fewer layers. This effectively reduces the overall height of the push-button switch device 101, simplifies the internal assembly process, and improves production efficiency.

[0070] In some embodiments, a positioning post 13 is formed in the cavity at the bottom of the base 10. A guide groove 14 is provided at one end of the positioning post 13 facing the shaft core 30. The shaft core 30 has a guide post 31, which is slidably disposed in the guide groove 14. A compression spring 70 is provided between the base 10 and the shaft core 30. The compression spring 70 is sleeved on the positioning post 13 and the guide post 31, with one end of the compression spring 70 connected to the shaft core 30 and the other end connected to the base 10. During the pressing of the shaft core 30, the compression spring 70 compresses and accumulates elastic potential energy. After the first contact portion 411 and the second contact portion 412 are connected, the pressing force on the shaft core 30 is released. The compressed compression spring 70 converts the elastic potential energy into kinetic energy, driving the shaft core 30 to return to its original position.

[0071] In some embodiments, a gasket 109 is provided between the bottom cover 103 and the circuit board 104.

[0072] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A push-button switch device, characterized in that: The device includes a base (10), an upper shell (20), a shaft (30), and a membrane switch (40). The upper shell (20) is fastened to the base (10). The shaft (30) is telescopically disposed on the upper shell (20). The base (10) is provided with a first contact terminal (11) and a second contact terminal (12). The membrane switch (40) is disposed below the base (10) or in a cavity formed between the upper shell (20) and the base (10). The membrane switch (40) is provided with an electrical contact (41). A pressing structure (60) is provided in the cavity. When the shaft (30) retracts into the cavity, the pressing structure (60) abuts against the electrical contact (41), and the electrical contact (41) conducts the first contact terminal (11) and the second contact terminal (12).

2. The push-button switch device as described in claim 1, characterized in that: The membrane switch (40) and the pressing structure (60) are perpendicular to each other.

3. The push-button switch device as described in claim 1, characterized in that: When the membrane switch (40) is disposed in the cavity, the membrane switch (40) is disposed parallel to the bottom wall of the base (10); Alternatively, the membrane switch (40) and the bottom wall of the base (10) are arranged perpendicular to each other.

4. The push-button switch device as described in claim 1, characterized in that: The membrane switch (40) includes a first membrane circuit layer (42), a second membrane circuit layer (43), and an isolation layer (44). From the upper shell (20) to the base (10), the first membrane circuit layer (42), the isolation layer (44), and the second membrane circuit layer (43) are stacked sequentially. The isolation layer (44) is provided with a through hole (441). The electrical contact (41) includes a first contact portion (411) and a second contact portion (412). The first contact portion (411) is located on the first membrane circuit layer (42), and the second contact portion (412) is located on the second membrane circuit layer (43). The first contact portion (411) and the second contact portion (412) correspond to the position of the through hole (441). When the pressing structure (60) abuts against the electrical contact (41), the first contact portion (411) and the second contact portion (412) are electrically connected.

5. The push-button switch device as described in claim 4, characterized in that: The second contact portion (412) includes a first portion (4121) and a second portion (4122). One end of the first portion (4121) and one end of the second portion (4122) are spaced apart. One end of the first portion (4121) and one end of the second portion (4122) correspond to the position of the through hole (441). The other end of the first portion (4121) extends away from the second portion (4122) and is connected to the first contact terminal (11). The other end of the second portion (4122) extends away from the first portion (4121) and is connected to the second contact terminal (12).

6. The push-button switch device as described in claim 4, characterized in that: The thickness P of the isolation layer (44) and the thickness M of the first thin film circuit layer (42) satisfy the relationship: P≤M; And / or, the thickness P of the isolation layer (44) and the thickness N of the second thin film circuit layer (43) satisfy the relationship: P≤N.

7. The push-button switch device according to any one of claims 1 to 6, characterized in that: The pressing structure (60) includes a main body (61) and a pressing part (62). The main body (61) is connected to the first contact terminal (11) or the shaft core (30). The pressing part (62) is disposed on the side of the main body (61) facing the membrane switch (40). Wherein, at least one of the main body (61) and the pressing part (62) is a first elastic element; Alternatively, the main body (61) and the pressing part (62) are connected to form a telescopic structure.

8. The push-button switch device as described in claim 7, characterized in that: When the main body (61) and the pressing part (62) are connected to form a telescopic structure, one of the main body (61) and the pressing part (62) is a sleeve, and a second elastic element (63) is provided inside the sleeve. The other of the main body (61) and the pressing part (62) is connected to the second elastic element (63). Alternatively, a third elastic element may be connected between the main body (61) and the pressing part (62).

9. A keyboard, characterized in that: The device includes an upper cover (102), a bottom cover (103), a circuit board (104), a cap (105), and a push-button switch device according to any one of claims 1 to 8. The upper cover (102) is provided with an opening (106). The upper cover (102) covers the bottom cover (103). An installation space (107) is formed between the upper cover (102) and the bottom cover (103). The circuit board (104) is disposed in the installation space (107). The push-button switch device (101) is disposed on one side of the circuit board (104). The end of the shaft (30) away from the base (10) protrudes from the opening (106) and is connected to the cap (105). The first contact terminal (11) and the second contact terminal (12) are both soldered to the circuit board (104); Alternatively, a plug-in socket (108) is provided on the other side of the circuit board (104), and the first contact terminal (11) and the second contact terminal (12) both pass through the circuit board (104) and are pluggably connected to the plug-in socket (108).

10. The keyboard as described in claim 9, characterized in that: The membrane switch (40) includes a first thin film circuit layer (42), a second thin film circuit layer (43), and an isolation layer (44). From the upper shell (20) to the base (10), the first thin film circuit layer (42), the isolation layer (44), and the second thin film circuit layer (43) are stacked sequentially. The isolation layer (44) is provided with a through hole (441). The electrical contact (41) includes a first contact portion (411) and a second contact portion (412). The first contact portion (411) is located on the first thin film circuit layer (42), and the second contact portion (412) is located on the second thin film circuit layer (43). The first contact portion (411) and the second contact portion (412) correspond to the position of the through hole (441). The second thin film circuit layer (43) is the circuit board (104).

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