Key switch and socket

Abstract

The invention discloses a key switch and a socket, and relates to the technical field of sockets. The key switch comprises a static contact piece, a movable contact piece, an overload protection piece and a reset assembly. The two ends of the movable contact piece are separately in contact fit with the static contact piece and the overload protection piece, and when the current flowing through the overload protection piece exceeds a set threshold value, the overload protection piece is separated from the movable contact piece; the reset assembly comprises an insulating plate, and when the key switch is in an overload disconnection state, the overload protection piece and the movable contact piece are separated through the insulating plate.

Description

[0001] This application is a divisional application of the following application: the application date is November 20, 2024, the application number is 202411674282.3, and the invention name is push button switch and socket. Technical Field

[0002] The present application relates to the technical field of sockets, and in particular to a key switch and a socket. Background Art

[0003] Sockets generally use switches to control the on and off of the power supply to achieve convenient power management, among which push-button switches are the most common. In addition, many sockets also have built-in overload protectors. When the current exceeds the safe level, the overload protector will automatically cut off the power supply to prevent the wires from overheating and causing fires, thereby improving the safety of electricity use. Summary of the invention

[0004] In view of this, the present application provides a key switch and a socket. The present application specifically adopts the following technical solutions:

[0005] The present application provides a key switch, which includes a stationary contact piece, a moving contact piece, an overload protection piece, and a reset assembly;

[0006] The two ends of the moving contact piece are respectively in contact and cooperate with the stationary contact piece and the overload protection piece so as to be detachable. When the current flowing through the overload protection piece exceeds a set threshold, the overload protection piece and the moving contact piece are detached from each other.

[0007] The reset assembly comprises an insulating plate, and when the key switch is in an overload disconnection state, the overload protection member and the moving contact piece are separated by the insulating plate.

[0008] Optionally, one end of the overload protection member is fixedly connected to the output terminal of the key switch, and the other end is a suspended end and has a first moving contact;

[0009] The first moving contact is used to contact and cooperate with the first static contact on the moving contact piece; when the current flowing through the overload protection component exceeds the set threshold, the overload protection component is deformed to cause the first moving contact to move away from the first static contact.

[0010] Optionally, an elastic protrusion is formed in the middle portion of the overload protection member, and a protruding direction of the elastic protrusion changes with the deformation of the overload protection member;

[0011] When the first moving contact and the first static contact are in contact, the moving contact piece is located on the recessed side of the elastic protrusion; when the first moving contact moves to the position farthest from the first static contact, the moving contact piece is located on the protruding side of the elastic protrusion.

[0012] Optionally, the insulating plate is movable between a first position and a second position.

[0013] Optionally, the reset assembly includes a driving member connected to the insulating plate;

[0014] The driving member is configured to apply a driving force to the insulating plate located at the second position, wherein the driving force is used to drive the insulating plate to move from the second position to the first position.

[0015] Optionally, the first position is located on a moving path of the first moving contact, and when the insulating plate is located at the first position, a plate surface of the insulating plate facing away from the moving contact piece abuts against the first moving contact;

[0016] The second position is located outside the moving path of the first moving contact, and when the insulating plate is located at the second position, it has a tendency to move toward the first position.

[0017] Optionally, a portion of the suspended end of the overload protection member forms a protrusion, the moving contact piece is located on a protruding side of the protrusion, and the first moving contact point is located on the top of the protrusion.

[0018] Optionally, the suspended end of the overload protection member further includes a remaining portion except the protruding portion;

[0019] When the insulating plate is located at the second position, the insulating plate is located between the moving contact piece and the remaining portion.

[0020] Optionally, the protrusion further comprises a root portion for connecting to the remaining portion, and a side portion located between the top portion and the root portion;

[0021] When the insulating plate is located at the second position, the first movable contact and the first stationary contact are in contact, and the side surface of the insulating plate abuts against the side portion of the protrusion.

[0022] Optionally, at the contact point between the insulating plate and the side portion of the protrusion, a tangent plane of the side portion is perpendicular to a direction of pressure applied by the insulating plate.

[0023] Optionally, at the contact point between the insulating plate and the side portion of the protrusion, a tangent plane of the side portion obliquely intersects with a direction of pressure applied by the insulating plate.

[0024] Optionally, the insulating plate comprises a first transverse plate, a longitudinal plate and a second transverse plate connected in sequence;

[0025] Wherein, the first transverse plate is connected to the driving member at a side away from the longitudinal plate; the second transverse plate is extended toward the first static contact at a side away from the longitudinal plate;

[0026] When the first movable contact is out of contact with the first stationary contact, at least a portion of the second transverse plate is located between the first movable contact and the first stationary contact.

[0027] Optionally, a non-straight angle is formed between the first transverse plate and the second transverse plate; and / or,

[0028] The second transverse plate includes a first plate segment and a second plate segment, the first plate segment is connected to the longitudinal plate, the second plate segment is connected to a side of the first plate segment away from the longitudinal plate, and a non-straight angle is formed between the first plate segment and the second plate segment.

[0029] Optionally, at least a portion of the plate surface of the second plate segment is parallel to the plate surface of the moving contact piece.

[0030] Optionally, the driving member is an elastomer, which is movably mounted on a switch housing of the push switch, and one end of the elastomer is exposed from the outside of the switch housing, and the insulating plate is connected to the elastomer, wherein as the insulating plate moves from the second position to the first position, the elastic deformation of the elastomer gradually decreases.

[0031] Optionally, the driving member includes a reset rod and an elastic member, the reset rod is movably mounted on the switch housing of the push switch, and one end of the reset rod is exposed from the outside of the switch housing, both ends of the elastic member are elastically abutted against the reset rod and the switch housing respectively, and the insulating plate is connected to the reset rod, wherein as the insulating plate moves from the second position to the first position, the elastic deformation of the elastic member gradually decreases.

[0032] Optionally, the movable contact piece includes: a movable portion and a fixed portion;

[0033] The suspended end of the movable part has a second movable contact point, which is used for contacting and cooperating with the second static contact point on the static contact piece.

[0034] Optionally, the key switch further comprises a pressing component, the pressing component is located on a side of the second moving contact away from the second static contact, and the pressing component abuts against the movable portion of the moving contact piece;

[0035] After the pressing force is applied to the pressing assembly, the suspended end of the movable portion is pushed to move toward the static contact piece until the second movable contact contacts the second static contact.

[0036] In addition, another aspect of the present application provides a socket, which includes the above-mentioned key switch.

[0037] In the key switch provided by the present application, the overload protection member and the insulating plate in the reset assembly cooperate with each other, so that when the key switch is in an overload disconnected state, the overload protection member and the movable contact piece can be separated in time by the insulating plate. That is, once an overload occurs and causes the overload protection member and the movable contact piece to be out of contact, the insulating plate will separate the overload protection member and the movable contact piece in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 This is a schematic diagram of the appearance structure of a key switch provided in an embodiment of the present application;

[0040] Figure 2 is an exploded view of a key switch provided in an embodiment of the present application;

[0041] Figure 3 It is a schematic diagram of the internal structure of an upper shell provided in an embodiment of the present application;

[0042] Figure 4 It is a schematic diagram of the internal structure of a key switch (with a hidden lower cover) provided in an embodiment of the present application;

[0043] Figure 5 is a structural schematic diagram of a key switch provided in an embodiment of the present application when it is in a non-overload disconnected state;

[0044] Figure 6 is a schematic structural diagram of a key switch provided in an embodiment of the present application when a current overload occurs;

[0045] Figure 7 is a structural schematic diagram of a key switch provided in an embodiment of the present application when it is in an overload disconnected state;

[0046] Figure 8 is a schematic diagram of the connection between the overload protection element and the output terminal provided in an embodiment of the present application;

[0047] Fig. 9 is a structural schematic diagram of a key switch provided by an embodiment of the present application when the insulating plate is located at a first position;

[0048] Fig.10is a structural schematic diagram of the key switch provided by an embodiment of the present application when the insulating plate is located at the second position;

[0049] Fig.11 is a schematic diagram of the structure of cooperation between the insulating plate provided in an embodiment of the present application, the movable contact piece, the driving member and the overload protection member when the insulating plate is in the second position;

[0050] Fig.12 is a schematic diagram of the connection structure between the reset rod and the insulating plate provided in an embodiment of the present application;

[0051] Fig.13 yes Fig.12 A top view of the reset rod and the insulating plate shown;

[0052] Fig.14 is a schematic diagram of the structure of cooperation between the insulating plate provided in an embodiment of the present application, the movable contact piece, the driving member and the overload protection member when the insulating plate is in the first position;

[0053] Fig.15 is a schematic diagram of assembling a movable contact piece on a switch housing provided in an embodiment of the present application;

[0054] Fig.16 is a cross-sectional view of the assembly structure of the movable contact piece on the switch housing provided in an embodiment of the present application;

[0055] Fig.17 is a schematic diagram of the structure of the movable contact piece provided in an embodiment of the present application;

[0056] Fig.18 is a structural axonometric diagram of the upper housing provided in an embodiment of the present application;

[0057] Fig.19 is a schematic diagram of the assembly of the movable contact piece and the upper housing provided in an embodiment of the present application;

[0058] Fig. 20 is an assembly cross-sectional view of the movable contact piece, the overload protection member and the output terminal on the upper housing provided in an embodiment of the present application;

[0059] Fig.21 It is a schematic diagram of the assembly of the static contact piece and the lower cover provided in an embodiment of the present application;

[0060] Fig. 22 is a schematic diagram of the structure of a stationary contact piece provided in an embodiment of the present application;

[0061] Fig.23 It is a structural schematic diagram of a key switch provided by an embodiment of the present application when a moving contact piece and a stationary contact piece are separated and disconnected;

[0062] Fig.24 It is a structural schematic diagram of a key switch provided by an embodiment of the present application when a moving contact piece and a stationary contact piece are in contact and conductive state;

[0063] Fig.25 This is a schematic diagram of the appearance structure of a push button switch with an indicator light provided in an embodiment of the present application;

[0064] Fig.26 It is a schematic diagram of the internal structure of a push button switch with an indicator light provided in an embodiment of the present application.

[0065] Reference numerals:

[0066] 1. Switch housing; 11. Upper housing; 111. First partition; 1111. First plate portion; 1112. Second plate portion; 1113. Third clamping block; 112. First cavity; 113. Second cavity; 114. First buckle portion; 1141. First limit block; 1142. First clamping block; 1143. Second interval; 115. Second buckle portion; 116. First buckle position; 117. Second partition; 118. Third interval; 1191. Third buckle position; 1192. Fourth buckle position; 1193. Fifth buckle position; 12. Lower cover; 121. Slot; 122. Support rib; 123. Second buckle position; 124. Fourth clamping block; 125. Fifth clamping block; 13. First interval;

[0067] 2. Pressing assembly; 21. Button; 22. First push rod; 23. Second push rod; 24. Compression spring;

[0068] 25. Plastic nails;

[0069] 3. static contact piece; 31. second static contact point; 32. main body; 33. second folded edge; 34. fourth interval;

[0070] 4. Moving contact piece; 41. Moving part; 42. Fixed part; 421. Third plate part; 4211. First folded edge; 422. Fourth plate part; 4221. Second clamping block; 43. First static contact point; 44. Second moving contact point;

[0071] 5. Overload protection part; 51. Bimetallic strip; 511. Raised part; 5111. Top part; 5112. Root part;

[0072] 5113, side portion; 512, remaining portion; 513, elastic protrusion; 52, first moving contact;

[0073] 6. Reset assembly; 61. Insulation plate; 611. First transverse plate; 612. Longitudinal plate; 613. Second transverse plate;

[0074] 6131, first plate segment; 6132, second plate segment; 62, driving member; 621, reset rod; 622, elastic member;

[0075] 7. Output terminal;

[0076] 8. First input terminal; 81. Concave surface.

[0077] 9. Second input terminal;

[0078] 10. Indicator light assembly; 101. Light-emitting member; 102. Lampshade; 1021. Sixth card block; 103. Conductive member.

[0079] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0080] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0081] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0082] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0083] An embodiment of the present application provides a push button switch, which is applied to a socket, such as a wired socket (also called an extension cord socket), a wireless socket (also called a socket without a wire), etc. Figure 1 The figure shows the appearance of a key switch provided by an embodiment of the present application. Figure 2 The figure shows the composition of a key switch provided by an embodiment of the present application. Figure 1 and Figure 2 As shown, the key switch provided in the embodiment of the present application includes a switch housing 1, a pressing assembly 2, a stationary contact piece 3, a moving contact piece 4 and an overload protection member 5.

[0084] like Figure 3As shown, the switch housing 1 has an inner cavity, in which a first partition 111 is disposed, and the first partition 111 divides the inner cavity into a first cavity 112 and a second cavity 113. The first partition 111 is made of insulating material, and the first cavity 112 and the second cavity 113 can be electrically isolated by the first partition 111.

[0085] like Figure 4 As shown, the pressing assembly 2 and the static contact piece 3 are both installed in the first cavity 112, and the overload protection member 5 is installed in the second cavity 113. It should be noted that in the embodiment of the present application, the structural member "installed in" the first cavity or the second cavity means that at least a part of the structural member is installed or accommodated by means of the first cavity 112 or the second cavity 113. Specifically, it includes both the situation that the structural member is completely accommodated in the first cavity or the second cavity, and the situation that only a part of the structural member is accommodated in the first cavity or the second cavity, and the other part is located outside the first cavity or the second cavity.

[0086] The moving contact piece 4 passes through the first partition plate 111, for example, the moving contact piece 4 crosses over or passes through the through hole on the first partition plate 111 from one side of the first partition plate 111, so that the moving contact piece 4 has a portion located in the first cavity 112 and a portion located in the second cavity 113, wherein the portion of the moving contact piece 4 located in the first cavity 112 is also in detachable contact and cooperation with the stationary contact piece 3, and the portion of the moving contact piece 4 located in the second cavity 113 is also in detachable contact and cooperation with the overload protection member 5.

[0087] In the embodiment of the present application, the key switch is configured such that when the current flowing through the overload protection element 5 exceeds a set threshold, the overload protection element 5 and the moving contact piece 4 are out of contact.

[0088] It should be noted that “two objects are in detachable contact and cooperation” means that the two objects can contact each other, and when the two objects are in contact and cooperation, when certain conditions are met (such as being subjected to external force), the two objects can move relative to each other and thus be out of contact.

[0089] In the embodiments of the present application, Fig.23 As shown, when the moving contact piece 4 is out of contact with the stationary contact piece 3, no current can be conducted between the moving contact piece 4 and the stationary contact piece 3, and the state of the key switch at this time can be called the disconnected state; Fig.24 As shown, when the moving contact piece 4 is in contact with the stationary contact piece 3, current can be conducted between the moving contact piece 4 and the stationary contact piece 3, and the state of the key switch in this case can be called the engaged state. However, since there is a detachable contact between the moving contact piece 4 and the overload protection member 5, when the key switch is in the disconnected state or the engaged state, the key switch may be powered on or off.

[0090] like Figure 5As shown, when the moving contact piece 4 is in contact with the overload protection piece 5, the moving contact piece 4 and the overload protection piece 5 are electrically connected. If the key switch is in the disconnected state at this time, the key switch is powered off; if the key switch is in the engaged state at this time, the key switch is powered on.

[0091] When the key switch is powered on, if a current overload occurs, such as Figure 6 As shown in FIG. 1 , the overload protection member 5 will be out of contact with the movable contact piece 4, thereby de-energizing the key switch, and at least a portion of the reset component 6 will move between the overload protection member 5 and the movable contact piece 4 to separate the overload protection member 5 and the movable contact piece 4. In this way, even if the overload protection member 5 is reset, Figure 7 As shown, the overload protection member 5 only abuts against the reset assembly 6, and does not contact the movable contact piece 4, thereby preventing the key switch from being powered on again, thereby avoiding the potential safety hazard caused by frequent circuit overload. Figure 7 The key switch state shown is called the overload disconnection state. It should be understood that in the overload disconnection state, the moving contact piece 4 and the stationary contact piece 3 usually maintain contact and cooperation, but the overload protection member 5 and the moving contact piece 4 are out of contact and away from each other.

[0092] It should be noted that "overload" means that the current flowing through is greater than a set threshold. The set threshold is set by technicians according to actual conditions, for example, the set threshold can be equal to the rated current value.

[0093] In the key switch provided in the embodiment of the present application, the inner cavity of the switch housing 1 is divided into two sub-cavities by a first partition 111, and the pressing assembly 2, the moving contact piece 4 and the static contact piece 3 for realizing the on-off control function, and the overload protection member 5 for realizing the overload protection function are respectively installed in the two sub-cavities, wherein the parts that need to be electrically connected can be contacted and matched through the first partition 111, and the parts that do not need to be electrically connected are electrically insulated through the first partition 111. Therefore, the scheme of the embodiment of the present application realizes the modular integrated assembly of the traditional key switch and the traditional overload protector, with a compact structure and a reasonable layout. In the socket assembly scenario, the key switch occupies a small space in the socket shell and is easy to install, which is conducive to improving the assembly efficiency of the socket.

[0094] In some embodiments of the present application, the overload protection member 5 may be a bimetallic strip 51. The bimetallic strip 51 is composed of two metals with different thermal expansion coefficients. When current passes through, the bimetallic strip 51 will bend and deform to different degrees due to different amounts of heat generated by the current.

[0095] like Figure 8 As shown, one end of the bimetallic strip 51 is fixedly connected to the output terminal 7 of the key switch. Figure 5As shown, the output terminal 7 is installed in the second cavity 113 of the switch housing 1, and a part of the output terminal 7 extends out of the switch housing 1 to facilitate electrical connection with other electrical components, such as a socket.

[0096] Continue to see Figure 8 The other end of the bimetallic strip 51 is suspended, and the other end of the bimetallic strip 51 is recorded as the suspended end. The suspended end has a first moving contact 52, and the first moving contact 52 is used to contact and cooperate with the first static contact 43 on the moving contact piece 4.

[0097] Optionally, the first moving contact 52 and the first stationary contact 43 are both silver contacts. The silver contacts have a small and stable contact resistance, which can effectively reduce current loss and improve conductive performance.

[0098] In the embodiment of the present application, when the current flowing through the bimetal strip 51 is overloaded, that is, the current flowing through the circuit exceeds the set threshold, the bimetal strip 51 is deformed due to the heat generated by the large current, causing the bimetal strip 51 to be suspended.

[0099] The end is bent in the direction away from the moving contact piece 4, so that the first moving contact 52 arranged at the suspended end will also move in the direction away from the first static contact 43, thereby breaking contact with the first static contact 43. In this way, the key switch can be powered off in the event of an overload.

[0100] In some embodiments of the present application, Figure 1 and Figure 2 As shown, the key switch further includes a reset assembly 6 which is installed in the second cavity 113 and can move relative to the switch housing 1. When the overload protection member 5 is out of contact with the movable contact piece 4, the reset assembly 6 moves between the overload protection member 5 and the movable contact piece 4 to separate the overload protection member 5 and the movable contact piece 4, thereby preventing the key switch from being energized.

[0101] In one example, the reset assembly 6 includes an insulating plate 61 . When the key switch is in the overload disconnection state, the overload protection member 5 and the moving contact piece 4 are separated by the insulating plate 61 .

[0102] The insulating plate 61 can be Fig. 9 The first position shown and Fig.10 The first position is located on the moving path of the first moving contact 52, see Fig. 9 When the insulating plate 61 is in the first position, the insulating plate 61 is located between the first moving contact 52 and the first static contact 43, the plate surface of the insulating plate 61 facing away from the moving contact piece 4 can abut against the first moving contact 52, and the plate surface of the insulating plate 61 close to the moving contact piece 4 can contact or not contact the first static contact 43.

[0103] See also Fig.10, the second position is outside the moving path of the first moving contact 52. When the insulating plate 61 is at the second position, the first moving contact 52 and the first static contact 43 can be in contact and matched without being blocked by the insulating plate 61. However, at this time, the insulating plate 61 is stressed and has a tendency to move toward the first position. In this way, once an overload occurs and causes the first moving contact 52 to lose contact with the first static contact 43, the insulating plate 61 can immediately move to the first position to separate the overload protection member 5 and the moving contact piece 4 in time.

[0104] In some embodiments of the present application, Figure 8 As shown, a portion of the suspended end of the bimetallic strip 51 forms a protrusion 511, and the remaining portion 512 of the suspended end is a straight transition. Fig.10 As shown, the moving contact piece 4 is located on the protruding side of the protruding portion 511, and the first moving contact 52 is located on the top 5111 of the protruding portion 511. In this embodiment, the top 5111 of the protruding portion 511 refers to the portion of the protruding portion 511 away from the remaining portion 512 of the suspended end; the protruding portion 511 also has a root 5112 for connecting with the remaining portion 512, and a side portion 5113 located between the top 5111 and the root 5112. Along the protruding direction of the protruding portion 511, the top 5111 and the root 5112 are located opposite to each other. When the insulating plate 61 is located at the second position, the first moving contact 52 is in contact with the first static contact 43, the insulating plate 61 is located between the moving contact piece 4 and the remaining portion 512, and the side surface of the insulating plate 61 is in contact with the side 5113 of the protruding portion 511.

[0105] In this way, when the insulating plate 61 is located at the second position, the insulating plate 61 will abut against the side portion 5113 of the raised portion 511 of the suspended end of the bimetallic strip 51, and apply a certain pressure to the side portion 5113, and the direction of the pressure is perpendicular to the contact and matching direction of the first movable contact 52 and the second static contact 31. In one example, at the contact point between the insulating plate 61 and the side portion 5113 of the raised portion 511, the tangent plane of the side portion 5113 is perpendicular to the direction of the pressure applied by the insulating plate 61. At this time, no matter how great the pressure applied by the insulating plate 61 is (but it is necessary to ensure that the overload protection member 5 is not damaged), the suspended end of the bimetallic strip 51 cannot be driven away from the movable contact 4, and then the first movable contact 52 and the first static contact 43 maintain contact and matching, and will not be affected by the pressure of the insulating plate 61. In another example, at the contact point between the insulating plate 61 and the side 5113 of the protrusion 511, the tangent plane of the side 5113 is obliquely intersected with the direction of pressure applied by the insulating plate 61. At this time, the pressure applied by the insulating plate 61 should be maintained within a range that is not sufficient to drive the suspended end of the bimetallic strip 51 away from the moving contact piece 4, so as to ensure that the first moving contact 52 and the first static contact 43 can maintain contact and fit without being affected by the pressure of the insulating plate 61.

[0106] In some embodiments of the present application, the reset assembly 6 includes a driving member 62 connected to the insulating plate 61, and the driving member 62 is configured to: apply a driving force to the insulating plate 61 located at the second position, and the driving force is used to drive the insulating plate 61 to move from the second position to the first position. In this way, when the insulating plate 61 is located at the second position, the driving force causes the insulating plate 61 to have a tendency to move toward the first position.

[0107] Optionally, the driving member 62 may be an elastic body (not shown in the figure), such as a rubber spring. The elastic body is movably mounted on the switch housing 1, and one end of the elastic body is exposed from the outside of the switch housing 1 for receiving external actuation; the insulating plate 61 is connected to the elastic body, wherein as the insulating plate 61 moves from the second position to the first position, the elastic deformation of the elastic body gradually decreases. For example, when the insulating plate 61 is in the first position, the elastic deformation of the elastic body is zero, and at this time the insulating plate 61 is no longer acted upon by the driving force, and thus can stay in the first position.

[0108] Alternatively, if Fig.11 As shown, the driving member 62 may include a reset rod 621 and an elastic member 622, wherein the reset rod 621 is generally made of insulating material, and the elastic member 622 may be, for example, a spring. Figure 1 The reset rod 621 is movably mounted on the switch housing 1, and one end of the reset rod 621 is exposed from the outside of the switch housing 1 to receive external actuation. Fig.11 , the two ends of the elastic member 622 are elastically abutted against the reset rod 621 and the switch housing 1 respectively, and the insulating plate 61 is connected to the reset rod 621, wherein as the insulating plate 61 moves from the second position to the first position, the elastic deformation of the elastic member 622 gradually decreases. For example, when the insulating plate 61 is located at the first position, the elastic deformation of the elastic member 622 is very small, and the elastic force provided by the elastic member 622 is offset by the gravity of the reset rod 621 and the insulating plate 61. At this time, the insulating plate 61 is no longer acted upon by the driving force, and thus can stay at the first position.

[0109] It should be noted that, in this embodiment, a through hole is provided on the switch housing 1, and the driving member 62 has a portion exposed from the outside of the switch housing 1 through the through hole. The phrase "exposed from the outside of the switch housing 1 through the through hole" includes both the situation that the driving member 62 extends to the outside of the switch housing 1 through the through hole and the situation that the driving member 62 is located on the inner side of the switch housing 1 or is flush with the edge of the through hole, and at least a portion of the driving member 62 can be seen in the direction facing the through hole. Figure 1 It shows that one end of the reset rod 621 in the driving member 62 passes through the through hole on the switch housing 1 and extends to the outside of the switch housing 1 .

[0110] The portion of the driving member 62 exposed from the outside of the switch housing 1 is used to receive external actuation. Figure 7 In the overload disconnection state shown, since the insulating plate 61 is located between the first moving contact 52 and the first static contact 43, the key switch cannot actively restore power. In this case, the user can manually press the portion of the driving member 62 (e.g., the reset rod 621) exposed outside the switch housing 1, so that the driving member 62 drives the insulating plate 61 to move from the first position to the second position, and the elastic deformation of the elastic body or elastic member 622 increases. When the insulating plate 61 leaves the moving path of the first moving contact 52, the first moving contact 52 can move close to the first static contact 43 under the deformation force of the bimetal 51 itself until it contacts the first static contact 43. The user can then remove the pressing force, and the insulating plate 61 is located in the second position under the driving force of the driving member 62, that is, it abuts against the side 5113 of the protrusion 511 of the suspended end of the bimetal 51.

[0111] In some embodiments of the present application, Figure 3 and Figure 4 As shown, in order to achieve a reasonable layout of various components in the inner cavity of the switch housing 1 and improve the space utilization of the inner cavity, the driving member 62 is located on the first side of the moving contact piece 4 and the stationary contact piece 3, and the overload protection member 5 is located on the second side of the moving contact piece 4 and the stationary contact piece 3, and the first side is adjacent to the second side.

[0112] See also Figure 3 The first partition plate 111 includes a first plate portion 1111 and a second plate portion 1112 that are bent and connected to each other. The portion of the moving contact piece 4 located in the first cavity 112 is separated from the driving member 62 by the first plate portion 1111, and the static contact piece 3 is located on the side of the moving contact piece 4 away from the first plate portion 1111; the portion of the moving contact piece 4 located in the first cavity 112 and the static contact piece 3 are separated from the overload protection member 5 by the second plate portion 1112.

[0113] In this way, the electrical isolation between the moving contact piece 4 and the driving member 62 and the electrical isolation between the stationary contact piece 3 and the overload protection member 5 are ensured, thereby ensuring the effectiveness of the overload protection function.

[0114] Optionally, the first partition plate 111 is an L-shaped plate, and the first plate portion 1111 and the second plate portion 1112 are perpendicular to each other, so as to facilitate the processing and forming of various structures inside the switch housing 1, while further improving the space utilization of the inner cavity and realizing reasonable and full utilization of the layout space.

[0115] In some embodiments of the present application, the insulating plate 61 is a Z-shaped plate, the shape of which matches the shape of the first partition plate 111 at the corner to reduce the space occupied by the switch housing 1. Fig.12 and Fig.13As shown, the insulating plate 61 includes a first transverse plate 611, a longitudinal plate 612, and a second transverse plate 613 connected in sequence, wherein the first transverse plate 611 is connected to the driving member 62 at a side away from the longitudinal plate 612, and the angle between the first transverse plate 611 and the second transverse plate 613 is a non-straight angle; the second transverse plate 613 includes a first plate segment 6131 and a second plate segment 6132 connected by bending, wherein the first plate segment 6131 is connected to the longitudinal plate 612, and the second plate segment 6132 extends in a direction close to the first static contact 43. When the key switch is in an overload disconnecting state, at least a portion of the second plate segment 6132 is located between the first static contact 43 of the moving contact piece 4 and the first moving contact 52 of the bimetallic strip 51, wherein the angle between the first plate segment 6131 and the second plate segment 6132 is a non-straight angle.

[0116] It should be noted that, in this embodiment, "the angle between the first horizontal plate 611 and the second horizontal plate 613" refers to the angle between the plate surface of the first horizontal plate 611 and the plate surface of the second horizontal plate 613; "the angle between the first plate segment 6131 and the second plate segment 6132" refers to the angle between the plate surface of the first plate segment 6131 and the plate surface of the second plate segment 6132; "non-straight angle" means that the angle is not 180°. That is, the two plate surfaces are not parallel. In this way, the insulating plate 61 is bent through multiple sections to achieve the second plate segment 6132 extending between the moving contact piece 4 and the bimetallic strip 51 when the first horizontal plate 611 is connected to the driving member 62.

[0117] Optionally, at least a portion of the plate surface of the second plate segment 6132 is parallel to the plate surface of the movable contact piece 4 , thereby avoiding interference between the insulating plate 61 and the movable contact piece 4 during movement.

[0118] Alternatively, if Fig.13 As shown, the angle between the first transverse plate 611 and the second plate segment 6132 is a right angle to match the L-shaped first partition plate 111 and reduce unnecessary space waste.

[0119] In some embodiments of the present application, an elastic protrusion 513 is formed in the middle portion of the bimetallic strip 51, and the protruding direction of the elastic protrusion 513 changes with the deformation of the bimetallic strip 51, wherein when the first moving contact 52 and the first static contact 43 are in contact and mating, as shown in FIG. Fig.11 As shown, the movable contact piece 4 is located on the concave side of the elastic protrusion 513; when the first movable contact 52 moves to the position farthest from the first static contact 43, as shown in Fig.14 As shown, the movable contact piece 4 is located on the protruding side of the elastic protrusion 513 .

[0120] Among them, the middle part of the bimetallic strip 51 refers to the part located between the connection end with the output terminal 7 and the suspended end. Generally speaking, there is a spacing between the elastic protrusion 513 and the protrusion 511 of the suspended end. The elastic protrusion 513 is used to improve the overall rigidity of the bimetallic strip 51, so that the bimetallic strip 51 will not bend and deform due to lower temperature fluctuations, but will bend and deform when the current flowing through exceeds the set threshold and reaches a higher temperature. In addition, during the deformation of the bimetallic strip 51, the protruding direction of the elastic protrusion 513 is also conducive to the smooth bending of the bimetallic strip 51. Optionally, the elastic protrusion 513 is a pot piece.

[0121] In the embodiments of the present application, Fig.15 and Fig.16 As shown, the switch housing 1 includes an upper housing 11 and a lower cover 12. The upper housing 11 has an inner cavity and a first partition 111. The inner cavity has an open end. The lower cover 12 is detachably covered on the open end of the inner cavity, wherein a first spacer 13 is formed between the first partition 111 and the lower cover 12. The movable contact piece 4 includes a movable portion 41 and a fixed portion 42. The movable portion 41 is located in the first cavity 112. One end of the movable portion 41 is suspended and has a second movable contact 44 for contacting and cooperating with the second static contact 31 on the static contact piece 3. The other end of the movable portion 41 is connected to the portion of the fixed portion 42 located in the first cavity 112; the other part of the fixed portion 42 passes through the first spacer 13 and extends into the second cavity 113.

[0122] like Fig.23 As shown, the pressing component 2 is located on the side of the second moving contact 44 away from the second static contact 31, and the pressing component 2 abuts against the movable portion 41 of the moving contact piece 4. When the key switch is in the off state, if the pressing component 2 is pressed, the pressing component 2 will push the suspended end of the movable portion 41 to move toward the static contact piece 3 until the second moving contact 44 contacts the second static contact 31, presenting a Fig.24 The engaged state is shown.

[0123] An exemplary structure of a pressing assembly 2 is provided below. Figure 2 , Fig.23 and Fig.24As shown, a mounting sleeve with openings at both ends is provided on the housing. The pressing assembly 2 includes a button 21, a first push rod 22, a second push rod 23, a compression spring 24 and a rubber nail 25. The switch cap is fixed on the first push rod 22 to receive the pressing force applied by the user; the first push rod 22 and the second push rod 23 can both be movably mounted on the inner side of the mounting sleeve, the first push rod 22 can be movably sleeved on the outer side of the second push rod 23, the end of the second push rod 23 away from the first push rod 22 is open, the compression spring 24 is located in the inner cavity of the second push rod 23, and elastically abuts against the second push rod 23, the end of the compression spring 24 away from the second push rod 23 is sleeved on the rubber nail 25, and the rubber nail 25 is fixed or abutted on the suspended end of the movable part 41 of the moving contact piece 4.

[0124] like Figure 2 As shown, a plurality of first bevel teeth are arranged at intervals along the circumferential direction on the lower part of the first push rod 22, and a plurality of second bevel teeth are arranged at intervals along the circumferential direction on the outer wall of the second push rod 23, and the plurality of first bevel teeth can mesh with the plurality of second bevel teeth. At least one stopper is arranged on the bottom or inner wall of the mounting sleeve on the housing. Optionally, the number of the first bevel teeth is four, and the four first bevel teeth are spaced apart from each other; the number of the second bevel teeth is eight, and the eight second bevel teeth are connected in groups of two, and the four groups of second bevel teeth are spaced apart from each other. Based on the structure of the above-mentioned pressing assembly 2, when the button 21 is pressed, the first push rod 22 pushes the second push rod 23 to move downward, and the second beveled tooth will be pushed to a position below the limit block; then the pressing force is removed, and the second push rod 23 moves upward under the elastic force of the compression spring 24. At this time, the second beveled tooth may abut against the limit block, so that the second push rod 23 stays in the current position, so that the second moving contact 44 is maintained in a position of contact and cooperation with the second static contact 31; then, if the button 21 is pressed again, the first push rod 22 pushes the second push rod 23 downward. If the second push rod 23 moves, the second beveled tooth will move downward away from the limit block, and in the process of the second push rod 23 moving downward, based on the matching relationship between the inclined surfaces of the first beveled tooth and the second beveled tooth, the first beveled tooth will also synchronously drive the second push rod 23 to rotate; therefore, after the pressing force is removed again, the position of the second beveled tooth on the second push rod 23 is offset from the position of the limit block (that is, the limit block is aligned with the interval space between two adjacent second beveled teeth), so that the second push rod 23 can be reset, and the second moving contact 44 will be out of contact with the second static contact 31 based on the elastic deformation of the moving contact piece 4 itself. It should be noted that in the above example, the up and down direction is parallel to the moving direction of the pressing component 2, wherein the moving direction of the button 21 when being pressed is defined as "down", and the moving direction of the button 21 after the pressing force is removed is defined as "up".

[0125] In some embodiments of the present application, Fig.17 As shown, the fixing portion 42 may include a third plate portion 421 and a fourth plate portion 422 connected by bending. Fig.16The third plate portion 421 is connected to the movable portion 41 and extends into the second cavity 113 through the first interval 13. The fourth plate portion 422 of the fixed portion 42 is located in the second cavity 113 and is connected to the third plate portion 421 by bending. The first static contact 43 is located on the fourth plate portion 422.

[0126] Optionally, the third plate portion 421 may be clamped between the first partition plate 111 and the lower cover 12. For example, see Fig.16 When the upper shell 11 and the lower cover 12 are assembled, one side surface of the third plate portion 421 of the fixing portion 42 contacts the first partition 111, and the other side surface of the third plate portion 421 of the fixing portion 42 contacts the supporting rib 122 provided on the lower cover 12. Therefore, the first partition 111 and the lower cover 12 cooperate to achieve clamping and fixing of the third plate portion 421.

[0127] Alternatively, see Fig.16 At least a portion of the surface of the fourth plate portion 422 is in contact with the surface of the first partition plate 111 to ensure the stability of the first static contact 43 and the first moving contact 52 when they are in contact and mating.

[0128] In some embodiments of the present application, the moving contact piece 4 is fixed by the upper shell 11, and the first cavity 112 of the upper shell 11 is provided with a first snap-fit ​​portion 114 on the cavity wall away from the second cavity 113, and the first snap-fit ​​portion 114 is snap-fitted with the third plate portion 421; and / or, a second snap-fit ​​portion 115 is provided on the first partition plate 111, and the second snap-fit ​​portion 115 is snap-fitted with the fourth plate portion 422.

[0129] For example, see Fig.18 The first buckle portion 114 includes a first limit block 1141 and a first clamping block 1142, wherein the first clamping block 1142 is closer to the opening end of the inner cavity than the first limit block 1141, and along the opening direction of the inner cavity, there is a second interval 1143 between the first limit block 1141 and the first clamping block 1142. Fig.17 As shown, the third plate portion 421 of the fixing portion 42 is away from the edge of the fourth plate portion 422 and is bent in a direction away from the fourth plate portion 422 to form a first flanged edge 4211. Fig.19 As shown, when the moving contact piece 4 is assembled with the upper shell 11, the first folded edge 4211 can be engaged in the second interval 1143, wherein the plate surface of the third plate portion 421 contacts the first limiting block 1141, and the edge of the first folded edge 4211 away from the plate surface of the third plate portion 421 contacts the first blocking block 1142.

[0130] Alternatively, if Fig.19 As shown, the surface of the first locking block 1142 that faces away from the first limiting block 1141 is an inclined surface, and the inclined surface is used to facilitate the first folded edge 4211 to be inserted into the second spacer 1143.

[0131] For example, see Fig.18 The second buckle portion 115 includes a first buckle position 116, wherein the first buckle position 116 can be a groove or a through hole. Fig.17 As shown, the fourth plate portion 422 has a second block 4221. The second block 4221 is obtained by cutting a portion of the fourth plate portion 422 and then moving the second block 4221 toward the first partition plate 111.

[0132] After the second clamping block 4221 is bent, an inclined surface inclined relative to the plate surface of the fourth plate portion 422 is formed, and the inclined surface facilitates the second clamping block 4221 to be clamped into the first buckle position 116. Fig. 20 As shown, the second locking block 4221 is engaged with the first buckle position 116 .

[0133] Therefore, based on the first snap-fit ​​portion 114 and the second snap-fit ​​portion 115 , the movable contact piece 4 can be snap-fitted to the upper housing 11 more firmly for subsequent assembly.

[0134] In some embodiments of the present application, Fig. 20 As shown, the switch housing 1 includes a second partition 117, which is connected to the plate surface of the first partition 111 facing the second cavity 113, and the orthographic projection of the second partition 117 on the plate surface of the first partition 111 covers the first buckle position 116, wherein a third interval 118 is formed between the second partition 117 and the first partition 111, and a part of the fourth plate portion 422 is located in the third interval 118. The overload protection member 5 is located on the side of the second partition 117 away from the first partition 111, and is in contact with the part of the fourth plate portion 422 located outside the third interval 118. The first static contact 43 is arranged on the part of the fourth plate portion 422 located outside the third interval 118.

[0135] The second partition 117 is made of insulating material. By providing the second partition 117, the area facing the overload protection member 5 and the fourth plate body can be reduced, and the free electrons near the contact point when the overload protection member 5 is away from the moving contact piece 4 can be prevented from causing untimely power failure, thereby ensuring the effectiveness of the overload protection function.

[0136] Optionally, the second partition plate 117 is an L-shaped plate to facilitate processing and molding, and to accommodate the fourth plate portion 422. In some embodiments of the present application, a snap-fit ​​connection may be used between the upper shell 11 and the lower cover 12 to improve assembly convenience.

[0137] In one example, if Fig.18 As shown, a third block 1113 may be provided on the first partition plate 111; Figure 2 As shown, a buckle post extending along the opening direction of the inner cavity is provided on the lower cover 12, and the third clamping block 1113 is suitable for engaging with the second buckle position 123 on the buckle post.

[0138] In another example, Figure 2 As shown, a third buckle position 1191 is provided on the outer wall of the upper shell 11, and the lower cover 12 is provided with a first clamping arm extending along the opening direction of the inner cavity, and a fourth clamping block 124 is provided on the first clamping arm. The first clamping arm is in contact with the outer wall of the upper shell 11, and the fourth clamping block 124 is clamped with the third buckle position 1191.

[0139] In another example, Fig.18 As shown, a fourth buckle position 1192 is provided on the inner side wall of the upper shell 11; Figure 2 As shown, the lower cover 12 is provided with a second clamping arm extending along the opening direction of the inner cavity, the second clamping arm is provided with a fifth clamping block 125, the second clamping arm is fitted with the inner wall of the upper shell 11, and the fifth clamping block 125 is engaged with the fourth buckle position 1192.

[0140] In some embodiments of the present application, Fig.21 and Fig. 22 As shown, the stationary contact piece 3 is engaged and fixed with the lower cover 12 , and a fourth gap 34 is formed between the main body 32 of the stationary contact piece 3 and the lower cover 12 , wherein the main body 32 is provided with a second stationary contact point 31 .

[0141] For example, see Fig. 22 The stationary contact piece 3 includes a main body 32 and two second folded edges 33. The two second folded edges 33 are respectively connected to opposite sides of the main body 32 and are respectively bent relative to the main body 32 in a direction away from the movable portion 41. Fig.21 As shown, two slots 121 are spaced apart on the lower cover 12 , and the two second folded edges 33 are respectively inserted into the two slots 121 .

[0142] The temperature of the matching position of the second static contact 31 and the second moving contact 44 is usually high. By forming a fourth gap 34 between the main body 32 of the static contact piece 3 and the lower cover 12, air circulation and heat dissipation are facilitated.

[0143] In some embodiments of the present application, Fig. 22 As shown, the push switch also includes a first input terminal 8, one end of which is fixedly connected to the static contact piece 3, and the other end of the first input terminal 8 extends to the outside of the switch housing 1, wherein the other end of the first input terminal 8 has a concave surface 81, and the concave surface 81 is provided with uneven grooves.

[0144] When the key switch is applied to a wireless socket, the power cord cooperates with the concave surface 81 of the first input terminal 8 to achieve a tight connection. Therefore, the concave surface 81 can play a role in positioning the power cord. Moreover, by providing uneven grooves on the concave surface 81, the contact area between the first input terminal 8 and the power cord can be increased, thereby improving the conductive performance.

[0145] In some embodiments of the present application, Fig.26 and Fig.26 As shown, the push switch further includes a second input terminal 9 and an indicator light assembly 10, and the indicator light assembly 10 includes a light-emitting member 101, a lampshade 102, and two conductive members 103. The second input terminal 9 is installed in the first cavity 112, and the second input terminal 9 is spaced apart from the static contact piece 3 and the moving contact piece 4 respectively; the light-emitting member 101 and the lampshade 102 are located on the side of the pressing assembly 2 away from the moving contact piece 4, wherein the light-emitting member 101 is limited between the pressing assembly 2 and the lampshade 102, and the two ends of the light-emitting member 101 are electrically connected to the moving contact piece 4 and the second input terminal 9 respectively through the two conductive members 103; the lampshade 102 is movably connected to the switch housing 1, and the lampshade 102, the light-emitting member 101 and the pressing assembly 2 move synchronously.

[0146] The second input terminal 9 and the first input terminal 8 are terminals of different polarities. Exemplarily, the first input terminal 8 is an L-pole terminal, and the second input terminal 9 is an N-pole terminal.

[0147] like Fig.25 and Fig.26 As shown, the conductive member 103 may be, for example, a metal spring, which can connect the light-emitting member 101 to the circuit on one hand, and can also provide elastic force for the light-emitting member 101 and the lampshade 102 to return to their original positions after the pressing force is removed on the other hand. Optionally, three mounting sleeves are formed on the switch housing 1, wherein the mounting sleeve located in the middle position is used to install the pressing assembly 2, and the other two mounting sleeves are used to install and position the metal springs.

[0148] like Fig.25 As shown, the switch housing 1 may also be provided with a fifth buckle position 1193, which is a through hole; the lampshade 102 may also have a clamping arm extending along the pressing direction, on which a sixth clamping block 1021 is provided, the clamping arm passes through the fifth buckle position 1193, and is clamped with the fifth buckle position 1193 through the sixth clamping block 1021. The lampshade 102 can move relative to the switch housing 1 under the action of the pressing force and the elastic force of the pressing assembly 2 and the two conductive members 103, and at this time the clamping arm cooperates with the fifth buckle position 1193 to play a guiding role.

[0149] The embodiment of the present application further provides a socket, which may be a wireless socket or a wired socket, wherein the socket includes the key switch of any of the above embodiments.

[0150] The socket provided in the embodiment of the present application adopts the push button switch described in the above embodiment. While having both the on-off control function and the overload protection function, the push button switch is modularly designed with high integration, so it is easy to assemble and occupies a small layout space inside the socket shell.

[0151] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0152] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A push button switch, characterized in that: The key switch comprises a stationary contact piece (3), a movable contact piece (4), an overload protection component (5) and a reset component (6); The two ends of the moving contact piece (4) are respectively in contact and cooperate with the stationary contact piece (3) and the overload protection piece (5) in a detachable manner, and when the current flowing through the overload protection piece (5) exceeds a set threshold, the overload protection piece (5) and the moving contact piece (4) are disengaged; The reset assembly (6) comprises an insulating plate (61), and when the key switch is in an overload disconnection state, the overload protection member (5) and the movable contact piece (4) are separated by the insulating plate (61).

2. The key switch according to claim 1, characterized in that: One end of the overload protection element (5) is fixedly connected to the output terminal (7) of the key switch, and the other end is a suspended end and has a first moving contact (52); The first moving contact (52) is used to contact and cooperate with the first static contact (43) on the moving contact piece (4); when the current flowing through the overload protection element (5) exceeds the set threshold value, the overload protection element (5) deforms to cause the first moving contact (52) to move in a direction away from the first static contact (43).

3. The key switch according to claim 2, characterized in that: An elastic convex portion (513) is formed in the middle portion of the overload protection member (5), and the protruding direction of the elastic convex portion (513) changes as the overload protection member (5) is deformed; When the first moving contact (52) and the first stationary contact (43) are in contact and mating, the moving contact piece (4) is located on the recessed side of the elastic protrusion (513); when the first moving contact (52) moves to the position farthest from the first stationary contact (43), the moving contact piece (4) is located on the protruding side of the elastic protrusion (513).

4. The key switch according to claim 2 or 3, characterized in that: The insulating plate (61) is movable between a first position and a second position.

5. The key switch according to claim 4, characterized in that: The reset assembly (6) comprises a driving member (62) connected to the insulating plate (61); The driving member (62) is configured to apply a driving force to the insulating plate (61) located at the second position, wherein the driving force is used to drive the insulating plate (61) to move from the second position to the first position.

6. The key switch according to claim 4, characterized in that: The first position is located on the moving path of the first moving contact (52), and when the insulating plate (61) is located at the first position, the insulating plate (61) faces away from the plate surface of the moving contact piece (4) and abuts against the first moving contact (52); The second position is located outside the moving path of the first moving contact (52), and when the insulating plate (61) is located at the second position, it has a tendency to move toward the first position.

7. The key switch according to claim 4, characterized in that: A portion of the suspended end of the overload protection member (5) forms a protruding portion (511), the movable contact piece (4) is located on the protruding side of the protruding portion (511), and the first movable contact point (52) is located at the top (5111) of the protruding portion (511).

8. The key switch according to claim 7, characterized in that: The suspended end of the overload protection member (5) further includes a remaining portion (512) except the protruding portion (511); When the insulating plate (61) is located at the second position, the insulating plate (61) is located between the moving contact piece (4) and the remaining part (512).

9. The key switch according to claim 7 or 8, characterized in that: The protruding portion (511) further comprises a root portion (5112) for connecting to the remaining portion (512), and a side portion (5113) located between the top portion (5111) and the root portion (5112); When the insulating plate (61) is located at the second position, the first moving contact (52) and the first stationary contact (43) are in contact, and the side surface of the insulating plate (61) abuts against the side portion (5113) of the protruding portion (511).

10. The key switch according to claim 9, characterized in that: At the contact point between the insulating plate (61) and the side portion (5113) of the protruding portion (511), the tangent plane of the side portion (5113) is perpendicular to the direction of pressure applied by the insulating plate (61).

11. The key switch according to claim 9, characterized in that: At the contact point between the insulating plate (61) and the side portion (5113) of the protruding portion (511), the tangent plane of the side portion (5113) intersects obliquely with the direction of pressure applied by the insulating plate (61).

12. The key switch according to any one of claims 4 to 8, characterized in that: The insulating plate (61) comprises a first transverse plate (611), a longitudinal plate (612) and a second transverse plate (613) which are connected in sequence; Wherein, the first transverse plate (611) is connected to the driving member (62) at a side away from the longitudinal plate (612); the second transverse plate (613) is extended in a direction close to the first static contact (43) at a side away from the longitudinal plate (612); When the first movable contact (52) is out of contact with the first stationary contact (43), at least a portion of the second transverse plate (613) is located between the first movable contact (52) and the first stationary contact (43).

13. The key switch according to claim 12, characterized in that: The first transverse plate (611) and the second transverse plate (613) have a non-straight angle therebetween; and / or, The second transverse plate (613) includes a first plate segment (6131) and a second plate segment (6132), wherein the first plate segment (6131) is connected to the longitudinal plate (612), and the second plate segment (6132) is connected to a side of the first plate segment (6131) away from the longitudinal plate (612), and a non-straight angle is provided between the first plate segment (6131) and the second plate segment (6132).

14. The key switch according to claim 13, characterized in that: At least a portion of the plate surface of the second plate segment (6132) is parallel to the plate surface of the moving contact piece (4).

15. The key switch according to any one of claims 5 to 8, characterized in that: The driving member (62) is an elastic body, which is movably mounted on the switch housing (1) of the key switch, and one end of the elastic body is exposed from the outside of the switch housing (1), and the insulating plate (61) is connected to the elastic body, wherein as the insulating plate (61) moves from the second position to the first position, the elastic deformation of the elastic body gradually decreases.

16. The key switch according to any one of claims 5 to 8, characterized in that: The driving member (62) comprises a reset rod (621) and an elastic member (622); the reset rod (621) is movably mounted on the switch housing (1) of the key switch, and one end of the reset rod (621) is exposed from the outside of the switch housing (1); two ends of the elastic member (622) are elastically abutted against the reset rod (621) and the switch housing (1) respectively; the insulating plate (61) is connected to the reset rod (621); and as the insulating plate (61) moves from the second position to the first position, the elastic deformation of the elastic member (622) gradually decreases.

17. The key switch according to any one of claims 1 to 3, characterized in that: The movable contact piece (4) comprises: a movable part (41) and a fixed part (42); The suspended end of the movable part (41) has a second movable contact (44) for contacting and cooperating with the second static contact (31) on the static contact piece (3).

18. The key switch according to claim 17, characterized in that: The key switch further comprises a pressing component (2), the pressing component (2) being located on a side of the second moving contact (44) away from the second stationary contact (31), and the pressing component (2) abuts against the movable portion (41) of the moving contact piece (4); After the pressing force is applied to the pressing assembly (2), the suspended end of the movable portion (41) is pushed to move in a direction close to the stationary contact piece (3) until the second movable contact (44) contacts the second stationary contact (31).

19. A socket, characterized in that The socket comprises the key switch according to any one of claims 1-18.

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