CN110379661B - Push-button switch - Google Patents
Push-button switch Download PDFInfo
- Publication number
- CN110379661B CN110379661B CN201910573312.4A CN201910573312A CN110379661B CN 110379661 B CN110379661 B CN 110379661B CN 201910573312 A CN201910573312 A CN 201910573312A CN 110379661 B CN110379661 B CN 110379661B
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- Prior art keywords
- connecting rod
- link
- upper section
- keycap
- bottom plate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/14—Operating parts, e.g. push-button
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/26—Snap-action arrangements depending upon deformation of elastic members
- H01H13/28—Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs
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- Push-Button Switches (AREA)
Abstract
The invention provides a key switch which comprises a bottom plate, a keycap, a first connecting rod, a second connecting rod, an elastic contraction element, a touch piece and a thin film circuit unit. The bottom plate comprises a plurality of first bottom plate connecting parts and a plurality of second bottom plate connecting parts. The first connecting rod is movably combined with the first bottom plate connecting parts and movably connected with the keycap. The second connecting rod is movably combined with the second bottom plate connecting parts and movably connected with the keycap. One end of the elastic contraction element is connected with the first connecting rod, and the other end of the elastic contraction element is connected with the second connecting rod. The touch piece is arranged on one of the first connecting rod, the second connecting rod or the keycap. The thin film circuit unit includes a trigger part. The key switch of the embodiment of the invention can reduce the whole size of the key switch because the thin film circuit unit or the optical switch circuit unit provides the press touch signal. Furthermore, the design of the convex part or the bending elastic part can provide the paragraph feeling.
Description
Technical Field
The present invention relates to a key switch, and more particularly, to a key switch with a simplified structure.
Background
The conventional key switch includes a signal generating unit, a linkage rod, a segment sense generating mechanism, etc. since the size of the signal generating unit, the linkage rod, the segment sense generating mechanism, etc. is large, the overall size of the key switch is difficult to be reduced, and the key switch cannot meet the design requirement of being light and thin. In particular, in order to provide good signal transmission effect and good paragraph feeling effect, the signal generating unit and the paragraph feeling generating mechanism are often difficult to be omitted or replaced.
Disclosure of Invention
In view of the problems in the prior art, the present invention provides a key switch to solve the above problems.
An object of the present invention is to provide a key switch, including:
a base plate including a plurality of first base plate connection parts and a plurality of second base plate connection parts;
the key cap can move up and down between a release position and a pressing position;
the first connecting rod is provided with a first connecting rod upper section, a first left lower section and a first right lower section, the first left lower section and the first right lower section are movably combined with one of the plurality of first bottom plate connecting parts respectively, and the first connecting rod upper section is movably connected with the keycap;
the second connecting rod is provided with a second connecting rod upper section, a second left lower section and a second right lower section, the second left lower section and the second right lower section can be movably combined with one of the plurality of second bottom plate connecting parts respectively, and the second connecting rod upper section can be movably connected with the keycap;
one end of the elastic contraction element is connected with the first connecting rod, the other end of the elastic contraction element is connected with the second connecting rod, and the upper section of the first connecting rod and the upper section of the second connecting rod can move towards the approaching direction of each other by applying force;
at least one touch part, which is arranged on one of the first connecting rod, the second connecting rod or the keycap; and
a thin film circuit unit including a trigger part;
when the keycap is located at the release position and the first connecting rod and the second connecting rod are located at the first space posture, the touch part is separated from the trigger part, and the thin film circuit unit outputs a first electric signal;
when the keycap is located at the pressing position and the first connecting rod and the second connecting rod are located at the second space posture, the touch piece presses the trigger part, the thin film circuit unit outputs a second electric signal, and the first electric signal is different from the second electric signal.
In one embodiment, the first link and the second link are both U-shaped, one end of the elastic contracting element is connected to the first link upper section, and the other end of the elastic contracting element is connected to the second link upper section.
In one embodiment, the thin film circuit element is located between the floor and the keycap.
In an embodiment, the bottom plate is located between the thin film circuit unit and the keycap, the first connecting rod upper section includes an upper section abutting portion, the bottom plate includes a bottom plate abutting portion and a bottom plate notch, when the first connecting rod is in the second spatial posture, the upper section abutting portion abuts against the bottom plate abutting portion, and the triggering portion is pressed and contacted by the triggering member through the bottom plate notch.
In one embodiment, the first link includes a protruding shaft, the first base plate connection portion includes a connection groove, the protruding shaft rotates in the connection groove, a smooth inner surface and a protruding portion are formed in the connection groove, the protruding shaft rotates on the smooth inner surface along a first side of the protruding portion during the first link moves from the first space posture to the transition space posture, the protruding shaft passes over the protruding portion to transmit hand feeling resistance to the first link during the first link moves from the transition space posture to the second space posture, the protruding shaft slidably abuts against a second side of the protruding portion when the first link moves to the second space posture, and the first side and the second side are located on opposite sides of the protruding portion.
In one embodiment, the protruding shaft has a substantially rectangular cross-section, and the connecting slot further includes a first concave portion and a second concave portion, wherein the protruding shaft abuts the first concave portion when the first link is in the first spatial posture, and the protruding shaft extends into the second concave portion and abuts the convex portion when the first link is in the second spatial posture.
In an embodiment, the bottom plate further includes a fixing protrusion, the first link includes a bending elastic portion and a unit connection portion, one end of the bending elastic portion is connected to the first link, the other end of the bending elastic portion is connected to the unit connection portion, the unit connection portion includes a unit connection opening, the fixing protrusion passes through the unit connection opening, when the first link moves from the first spatial posture to the transition spatial posture, the fixing protrusion does not abut against an inner edge of the unit connection opening, and when the first link attempts to move from the transition spatial posture to the second spatial posture, the fixing protrusion abuts against an inner edge of the unit connection opening and pulls the bending elastic portion to deform the bending elastic portion to transfer a hand feeling resistance to the first link.
In one embodiment, the bending elastic portion has an S-shaped structure, when the first link is located in the first space position, a first included angle is formed between a long axis of the S-shaped structure and a long axis direction of the first link, and when the bending elastic portion is deformed, a second included angle is formed between the long axis of the S-shaped structure and the long axis direction of the first link, and the first included angle is different from the second included angle.
In one embodiment, the elastic contraction element is an extension spring, and when the first link is in the first spatial posture, the elastic contraction element extends along a horizontal direction, and when the first link is in the second spatial posture, the elastic contraction element pulls the second link, so that the elastic contraction element still extends along the horizontal direction.
In one embodiment, the key switch further includes a first balance bar and a second balance bar, the first balance bar and the second balance bar are substantially U-shaped, the first balance bar and the second balance bar respectively have a first balance bar opening and a second balance bar opening, the first link bar and the second link bar respectively have a first link bar opening and a second link bar opening, the base further includes a plurality of third base plate connection portions, the first balance bar and the second balance bar are pivoted to the third base plate connection portions and abut against the key cap, the first balance bar opening is oriented perpendicular to the first link bar opening, and the second balance bar opening is oriented perpendicular to the second link bar opening.
In another embodiment, the present invention further provides a key switch, including:
a base plate including a plurality of first base plate connection parts and a plurality of second base plate connection parts;
the keycap can move up and down between a release position and a pressing position;
the first connecting rod is provided with a first connecting rod upper section, a first left lower section and a first right lower section, the first left lower section and the first right lower section can be movably combined with one of the plurality of first bottom plate connecting parts respectively, and the first connecting rod upper section can be movably connected with the keycap;
the second connecting rod is provided with a second connecting rod upper section, a second left lower section and a second right lower section, the second left lower section and the second right lower section can be movably combined with one of the plurality of second bottom plate connecting parts respectively, and the second connecting rod upper section can be movably connected with the keycap;
one end of the elastic contraction element is connected with the first connecting rod, the other end of the elastic contraction element is connected with the second connecting rod, and the upper section of the first connecting rod and the upper section of the second connecting rod can move towards the approaching direction of each other by applying force;
at least one light path changing element, which is arranged on one of the first connecting rod, the second connecting rod or the keycap; and
the optical switch circuit unit comprises an optical transmitter and an optical receiver, the optical transmitter and the optical receiver are spaced to form a modulation space, and the optical transmitter transmits an optical signal to the optical receiver;
when the keycap is located at the release position and the first connecting rod and the second connecting rod are located at the first space posture, the optical path changing element and the modulation space have a first space relation, and the optical signal received by the optical receiver has a first intensity;
when the keycap is located at the pressing position and the first connecting rod and the second connecting rod are located at the second space posture, the optical path changing element and the modulation space lose the first space relation, the optical signal received by the optical receiver has a second intensity, and the first intensity is different from the second intensity.
In one embodiment, the first link and the second link are both U-shaped, one end of the elastic contracting element is connected to the first link upper section, and the other end of the elastic contracting element is connected to the second link upper section.
In one embodiment, the first link includes a protruding shaft, the first base plate connection portion includes a connection groove, the protruding shaft rotates in the connection groove, a smooth inner surface and a protruding portion are formed in the connection groove, the protruding shaft rotates on the smooth inner surface along a first side of the protruding portion during the first link moves from the first space posture to the transition space posture, the protruding shaft passes over the protruding portion to transmit hand feeling resistance to the first link during the first link moves from the transition space posture to the second space posture, the protruding shaft slidably abuts against a second side of the protruding portion when the first link moves to the second space posture, and the first side and the second side are located on opposite sides of the protruding portion.
In one embodiment, the protruding shaft has a substantially rectangular cross-section, and the connecting slot further includes a first concave portion and a second concave portion, wherein the protruding shaft abuts the first concave portion when the first link is in the first spatial posture, and the protruding shaft extends into the second concave portion and abuts the convex portion when the first link is in the second spatial posture.
In an embodiment, the bottom plate further includes a fixing protrusion, the first link includes a bending elastic portion and a unit connection portion, one end of the bending elastic portion is connected to the first link, the other end of the bending elastic portion is connected to the unit connection portion, the unit connection portion includes a unit connection opening, the fixing protrusion passes through the unit connection opening, when the first link moves from the first spatial posture to the transition spatial posture, the fixing protrusion does not abut against an inner edge of the unit connection opening, and when the first link attempts to move from the transition spatial posture to the second spatial posture, the fixing protrusion abuts against an inner edge of the unit connection opening and pulls the bending elastic portion to deform the bending elastic portion to transfer a hand feeling resistance to the first link.
In one embodiment, the bending elastic portion has an S-shaped structure, when the first link is located in the first space position, a first included angle is formed between a long axis of the S-shaped structure and a long axis direction of the first link, and when the bending elastic portion is deformed, a second included angle is formed between the long axis of the S-shaped structure and the long axis direction of the first link, and the first included angle is different from the second included angle.
In one embodiment, the elastic contraction element is an extension spring, and when the first link is in the first spatial posture, the elastic contraction element extends along a horizontal direction, and when the first link is in the second spatial posture, the elastic contraction element pulls the second link, so that the elastic contraction element still extends along the horizontal direction.
In one embodiment, the key switch further includes a first balance bar and a second balance bar, the first balance bar and the second balance bar are substantially U-shaped, the first balance bar and the second balance bar respectively have a first balance bar opening and a second balance bar opening, the first link and the second link respectively have a first link opening and a second link opening, the base further includes a plurality of third base connection portions, the first balance bar and the second balance bar are pivoted to the third base connection portions and abut against the key cap, the first balance bar opening is oriented perpendicular to the first link opening, and the second balance bar opening is oriented perpendicular to the second link opening.
By applying the key switch of the invention, the press contact signal is provided by the film circuit unit or the optical switch circuit unit, so the whole size of the key switch can be reduced. Moreover, through the design of the convex part or the bending elastic part, the section feeling can be provided. Therefore, the conventional device can be omitted, the overall device size can be reduced, the production and assembly costs can be reduced, and the original performance can be improved.
Drawings
Fig. 1A is an exploded view of a key switch according to a first embodiment of the present invention.
Fig. 1B is an exploded view of another view of the key switch according to the first embodiment of the invention.
Fig. 1C is a combination diagram showing the key switch according to the first embodiment of the present invention, wherein the first link and the second link are in the first spatial posture.
Fig. 1D is a combination diagram showing the key switch according to the first embodiment of the invention, wherein the first link and the second link are in the second spatial posture.
Fig. 1E shows a connection situation of the protruding shaft and the first base plate connection portion according to the first embodiment of the present invention, in which the first link and the second link are in the first spatial posture.
Fig. 1F shows the connection of the protruding shaft and the first base plate connecting portion according to the first embodiment of the present invention, wherein the first connecting rod and the second connecting rod are in the second spatial posture.
Fig. 2A is a diagram showing a key switch according to a second embodiment of the present invention, wherein the first link and the second link are in a first spatial posture.
Fig. 2B is a diagram showing a key switch according to a second embodiment of the present invention, wherein the first link and the second link are in a transition space posture.
Fig. 2C is a diagram showing a key switch according to a second embodiment of the present invention, wherein the first link and the second link are in a second spatial posture.
Fig. 3A is an exploded view of a key switch according to a third embodiment of the present invention.
Fig. 3B is an exploded view of another perspective of the key switch according to the third embodiment of the present invention.
Fig. 3C is a diagram showing a key switch according to a third embodiment of the invention, wherein the first link and the second link are in the first spatial posture.
Fig. 3D is a diagram showing a key switch according to a third embodiment of the invention, wherein the first link and the second link are in a transition space posture.
Fig. 3E shows a key switch according to a third embodiment of the invention, wherein the first link and the second link are in a second spatial posture.
Fig. 4 shows a modification of the present invention.
Fig. 5A and 5B are schematic views showing a push switch according to a fourth embodiment of the present invention.
Fig. 6A and 6B are schematic diagrams illustrating a key switch according to a fifth embodiment of the invention.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following detailed description of the embodiments is given.
Fig. 1A is an exploded view of a key switch according to a first embodiment of the present invention. Fig. 1B is an exploded view of another view of the key switch according to the first embodiment of the invention. Fig. 1C and 1D are combined views showing a key switch B1 according to a first embodiment of the present invention. Referring to fig. 1A, 1B, 1C and 1D, the key switch B1 includes a bottom plate 3, a key cap 4, a first link 1, a second link 2, an elastic contracting element 5, at least a touch piece 61 and a thin film circuit unit 7. The base plate 3 includes a plurality of first base plate connection portions 31 (fig. 1A and 1B) and a plurality of second base plate connection portions 32 (fig. 1A and 1B). The key cap 4 is movable up and down between a higher position (released position of the key cap 4 in fig. 1C) and a lower position (depressed position of the key cap 4 in fig. 1D). The first connecting rod 1 has a first connecting rod upper section 13, a first left lower section 11 and a first right lower section 12, the first left lower section 11 and the first right lower section 12 are movably combined with one of the plurality of first bottom plate connecting parts 31 respectively, and the first connecting rod upper section 13 is movably connected with the keycap 4. The second connecting rod 2 has a second connecting rod upper section 23, a second left lower section 21 and a second right lower section 22, the second left lower section 21 and the second right lower section 22 can be movably combined with one of the plurality of second bottom plate connecting portions 32, respectively, and the second connecting rod upper section 23 can be movably connected with the key cap 4. One end of the elastic contraction element 5 is connected with the first connecting rod 1, the other end of the elastic contraction element 5 is connected with the second connecting rod 2, and the first connecting rod upper section 13 and the second connecting rod upper section 23 can move towards the approaching direction of each other by applying force. The triggering component 61 can be selectively disposed on one of the first link 1, the second link 2 or the key cap 4. The thin-film circuit unit 7 includes at least one trigger portion 71. Referring to fig. 1C, when the key cap 4 is located at a higher position and the first link 1 and the second link 2 are in the first spatial posture, the triggering part 61 is separated from the triggering part 71, and the thin-film circuit unit 7 outputs a first electrical signal. Referring to fig. 1D, when the key cap 4 is located at the lower position and the first connecting rod 1 and the second connecting rod 2 are located at the second spatial posture, the touch member 61 presses the trigger portion 71, and the thin-film circuit unit 7 outputs a second electrical signal, where the first electrical signal is different from the second electrical signal.
Referring to fig. 1C and 1D, in an embodiment, the first link 1 and the second link 2 are both U-shaped, one end of the elastic contraction element 5 is connected to the first link upper section 13, and the other end of the elastic contraction element 5 is connected to the second link upper section 23.
In a first embodiment of the invention, the thin film circuit unit is located between the base plate and the keycap. However, the disclosure does not limit the invention, for example, in another embodiment, the bottom plate is located between the thin film circuit unit and the key cap, the upper section of the first connecting rod includes an upper section abutting portion, the bottom plate includes a bottom plate abutting portion and a bottom plate notch, when the first connecting rod is in the second spatial posture, the upper section abutting portion abuts the bottom plate abutting portion, and the touch member passes through the bottom plate notch to press and touch the trigger portion.
Fig. 1E shows a connection situation of the protruding shaft 14 and the first base plate connecting portion 31 of the first link 1 according to the first embodiment of the present invention, wherein the first link 1 and the second link 2 are in the first spatial posture. Fig. 1F shows the connection between the protruding shaft 14 and the first base plate connecting portion 31 of the first connecting rod 1 according to the first embodiment of the present invention, wherein the first connecting rod and the second connecting rod are in the second spatial posture.
Fig. 2A, 2B and 2C show a key switch B2 according to a second embodiment of the present invention. Referring to fig. 2A, 2B and 2C, in this embodiment, the first link 1 includes a protruding shaft 14, the first base plate connecting portion 31 includes a connecting groove 310, the protruding shaft 14 rotates in the connecting groove 310, a smooth inner surface 313 and a convex portion 314 are formed in the connecting groove 310, the convex portion 314 has a convex portion first side 314A and a convex portion second side 314B which are located on two opposite sides of a top end of the convex portion 314, the smooth inner surface 313 is adjacent to the connecting convex portion first side 314A, when the key cap 4 moves from the upper position to the lower position, the first link 1 moves from the first spatial posture (fig. 2A) to the transition spatial posture (fig. 2B), and the protruding shaft 14 rotates and slides on the smooth inner surface 313 at this stage. The first link 1 moves from the transition space posture (fig. 2B) to the second space posture (fig. 2C), the convex shaft 14 slides to the second side 314B of the convex part after passing over the top of the convex part 314 at this stage, the convex part 314 applies resistance to the convex shaft 14 to transmit hand feeling resistance to the first link 1, so that the hand feeling resistance can provide a user with a paragraph feeling when the user presses and conducts the key, and the paragraph feeling is used for simulating a force feedback effect (rubber dome) transmitted to the user's finger when the bowl-shaped elastic body collapses and is conducted by the conventional key.
Referring to fig. 2A, 2B and 2C, in an embodiment, the protruding shaft 14 has a substantially rectangular cross section, the connecting slot 310 has an inner top surface 319, and the inner top surface 319 sequentially includes: a first recess 311, an arcuate lower projection 318, and a second recess 312. When the first link 1 is in the first spatial posture (fig. 2A), the protruding shaft 14 abuts the first concave portion 311. When the first link 1 is in the second spatial posture (fig. 2C), the protruding shaft 14 protrudes into the second concave portion 312. During the process of moving the first link 1 from the first spatial posture (fig. 2A) to the second spatial posture (fig. 2C), the left end of the protruding shaft 14 first abuts against the first concave portion 311, the upper surface of the protruding shaft 14 slides along the arc-shaped lower protrusion 318, and finally the right end of the protruding shaft 14 extends into the second concave portion 312, thereby providing a smooth rotation effect.
Fig. 3A is an exploded view of a key switch according to a third embodiment of the present invention. Fig. 3B is an exploded view of another perspective of the key switch according to the third embodiment of the present invention. Fig. 3C is a diagram showing a key switch according to a third embodiment of the present invention, in which the first link and the second link are in the first spatial posture. Fig. 3D is a diagram showing a key switch according to a third embodiment of the invention, wherein the first link and the second link are in a transition space posture. Fig. 3E shows a key switch according to a third embodiment of the invention, wherein the first link and the second link are in a second spatial posture. Referring to fig. 3A, 3B, 3C, 3D, and 3E, in this embodiment, the bottom plate 3 further includes a fixing protrusion 331, the first link 1 includes a bending elastic portion 151 and a unit connection portion 152, one end of the bending elastic portion 151 is connected to the first link 1, the other end of the bending elastic portion 151 is connected to the unit connection portion 152, the unit connection portion 152 includes a unit connection opening 153, and the fixing protrusion 331 passes through the unit connection opening 153. During the movement of the key cap 4 from the upper position to the lower position, the following 3 stages are passed: (1) the first link 1 is initially located at the first spatial posture (fig. 3C), the fixing boss 331 is far away from the inner edge of the unit connection opening 153, (2) the first link 1 has moved from the first spatial posture (fig. 3C) to the transition spatial posture (fig. 3D), the fixing boss 331 has not abutted against the inner edge of the unit connection opening 153, and there is a gap D between the fixing boss 331 and the inner edge of the unit connection opening 153, (3) the first link 1 moves from the transition spatial posture (fig. 3D) to the second spatial posture (fig. 3E), and the fixing boss 331 abuts against the inner edge of the unit connection opening 153 at this time and pulls the bending elastic part 151 to deform the bending elastic part 151 and transmit the hand feeling resistance to the first link 1. Therefore, the hand feeling resistance can provide the user with the step feeling representing the key press conduction.
Referring to fig. 3C, 3D and 3E, in an embodiment, the bending elastic portion 151 has an S-shaped structure, and when the first link 1 is located at the first spatial posture, a first included angle θ 1 is formed between a long axis a1 of the S-shaped structure and a long axis direction a2 of the first link. When the bending elastic part 151 deforms, a second included angle θ 2 is formed between the S-shaped structure long axis a1 and the first link long axis direction a2, and the first included angle θ 1 is different from the second included angle θ 2.
In the above embodiment, the elastic contracting member 5 is an extension spring, and when the first link 1 or the second link 2 is in the first spatial posture, the elastic contracting member 5 extends in the horizontal direction; in addition, since the lower end portions of the first link 1 and the second link 2 are engaged with each other to form the linkage mechanism, when one of the first link 1 and the second link 2 is pressed to move downward, the other link is driven to move downward synchronously, so that when the first link 1 or the second link 2 is in the second spatial posture, the elastic contraction element 5 is still extended substantially along the horizontal direction.
Referring to fig. 4, in an embodiment, the key switch further includes a first balance bar 81 and a second balance bar 82, the first balance bar 81 and the second balance bar 82 are substantially U-shaped, the first balance bar 81 and the second balance bar 82 respectively have a first balance bar opening 811 and a second balance bar opening 821, the first link 1 and the second link 2 respectively have a first link opening 161 and a second link opening 261, the bottom plate 3 further includes a plurality of third bottom plate connection portions 33, the first balance bar 81 and the second balance bar 82 are pivotally connected to the third bottom plate connection portions 33 and abut against the key cap 4, the first balance bar opening 811 faces perpendicular to the first link opening 161, and the second balance bar opening 821 faces perpendicular to the second link opening 261.
Referring to fig. 5A and 5B, a key switch B4 according to a fourth embodiment of the invention is shown, wherein a triggering component 62 is disposed on the key cap 4 for providing a triggering function. Referring to fig. 6A and 6B, a key switch B5 according to a fifth embodiment of the invention is shown, wherein the triggering component 63 is disposed on the first left lower segment 11 or the first right lower segment 12 to provide a triggering effect.
In another embodiment, the present invention further provides a key switch, wherein the aforementioned touch element and the thin film circuit unit can be replaced by at least one optical path changing element and an optical switch circuit unit, and the detailed embodiment of the optical key switch can refer to the content of patent CN108962654A, in which embodiments of the optical path changing element (light shielding element/reflecting element) and the optical switch circuit unit (light emitter and light sensor) are disclosed. In one embodiment, the optical path changing element is disposed on one of the first link, the second link, or the keycap. The optical switch circuit unit comprises an optical transmitter and an optical receiver, the optical transmitter and the optical receiver are spaced to form a modulation space, and the optical transmitter transmits an optical signal to the optical receiver. When the keycap is located at a higher position and the first connecting rod and the second connecting rod are located at the first space posture, the optical path changing element and the modulation space have a first space relation, and the optical signal received by the optical receiver has a first intensity. When the keycap is located at a lower position and the first connecting rod and the second connecting rod are located at the second space posture, the light path changing element and the modulation space lose the first space relation, the light signal received by the light receiver has a second intensity, and the first intensity is different from the second intensity.
By applying the key switch of the embodiment of the invention, the whole size of the key switch can be reduced because the thin film circuit unit or the optical switch circuit unit provides the press touch signal. Furthermore, the design of the convex part or the bending elastic part can provide the paragraph feeling. Therefore, the conventional device can be omitted, the overall device size can be reduced, the production and assembly costs can be reduced, and the original performance can be improved.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such alterations and modifications are included in the invention, insofar as they do not depart from the spirit and scope of the invention.
Claims (13)
1. A key switch, comprising:
a base plate including a plurality of first base plate connection parts and a plurality of second base plate connection parts;
the key cap can move up and down between a release position and a pressing position;
the first connecting rod is provided with a first connecting rod upper section, a first left lower section and a first right lower section, the first left lower section and the first right lower section are movably combined with one of the plurality of first bottom plate connecting parts respectively, and the first connecting rod upper section is movably connected with the keycap;
the second connecting rod is provided with a second connecting rod upper section, a second left lower section and a second right lower section, the second left lower section and the second right lower section can be movably combined with one of the plurality of second bottom plate connecting parts respectively, and the second connecting rod upper section can be movably connected with the keycap;
one end of the elastic contraction element is connected with the upper section of the first connecting rod, the other end of the elastic contraction element is connected with the upper section of the second connecting rod, and the upper section of the first connecting rod and the upper section of the second connecting rod can move towards the approaching direction of each other by applying force;
at least one touch part, which is arranged on one of the first connecting rod, the second connecting rod or the keycap; and
a thin film circuit unit including a trigger part;
when the keycap is located at the release position and the first connecting rod and the second connecting rod are located at the first space posture, the touch part is separated from the trigger part, and the thin film circuit unit outputs a first electric signal;
when the keycap is located at the pressing position and the first connecting rod and the second connecting rod are located at the second space posture, the touch piece presses the trigger part, the thin film circuit unit outputs a second electric signal, and the first electric signal is different from the second electric signal;
the first connecting rod further comprises a convex shaft, the first bottom plate connecting part comprises a connecting groove, a smooth inner face and a convex part are formed in the connecting groove, the convex part is provided with a first side and a second side, the first side and the second side are located on two opposite sides of the convex part, when the keycap moves to the pressing position from the releasing position, the convex shaft firstly rotates along the first side of the convex part in the smooth inner face, and then the convex shaft is in sliding abutting joint with the second side of the convex part.
2. The pushbutton switch as recited in claim 1, wherein the first link and the second link are U-shaped.
3. The key switch of claim 1, wherein the thin film circuit unit is located between the base plate and the key cap; alternatively, the first and second electrodes may be,
the bottom plate is located between the thin film circuit unit and the keycap, the upper section of the first connecting rod comprises an upper section abutting part, the bottom plate comprises a bottom plate abutting part and a bottom plate notch, when the first connecting rod is located in the second space posture, the upper section abutting part abuts against the bottom plate abutting part, and the touch part is pressed and contacted with the trigger part through the bottom plate notch.
4. The pushbutton switch as recited in claim 1, wherein the shaft rotates within the connecting slot, the shaft rotates along a first side of the protrusion on the smooth inner surface during movement of the first link from the first spatial position to the transitional spatial position, the shaft passes over the protrusion to transfer tactile resistance to the first link during movement of the first link from the transitional spatial position to the second spatial position, and the shaft slides against a second side of the protrusion when the first link moves to the second spatial position.
5. The pushbutton switch as recited in claim 4, wherein the protruding shaft is substantially rectangular in cross section, the connecting slot further comprising a first concave portion and a second concave portion, the protruding shaft abutting the first concave portion when the first link is in the first spatial attitude, and the protruding shaft extending into the second concave portion and abutting the convex portion when the first link is in the second spatial attitude.
6. The key switch of claim 1, wherein the elastic contracting element is an extension spring, and when the first link is in the first spatial posture, the elastic contracting element extends in a horizontal direction, and when the first link is in the second spatial posture, the elastic contracting element pulls the second link so that the elastic contracting element still extends in the horizontal direction.
7. The pushbutton switch according to claim 2, wherein the pushbutton switch further comprises a first and a second balance bar, the first and second balance bars being substantially U-shaped in configuration, the first and second balance bars having a first and a second balance bar opening, respectively, the first and second link bars having a first and a second link bar opening, respectively, the base further comprising a plurality of third base plate connecting portions, the first and second balance bars being pivotally connected to the third base plate connecting portions and abutting against the key cap, the first balance bar opening being oriented perpendicular to the orientation of the first link bar opening, the second balance bar opening being oriented perpendicular to the orientation of the second link bar opening.
8. A key switch, comprising:
a base plate including a plurality of first base plate connection parts and a plurality of second base plate connection parts;
the keycap can move up and down between a release position and a pressing position;
the first connecting rod is provided with a first connecting rod upper section, a first left lower section and a first right lower section, the first left lower section and the first right lower section can be movably combined with one of the plurality of first bottom plate connecting parts respectively, and the first connecting rod upper section can be movably connected with the keycap;
the second connecting rod is provided with a second connecting rod upper section, a second left lower section and a second right lower section, the second left lower section and the second right lower section can be movably combined with one of the plurality of second bottom plate connecting parts respectively, and the second connecting rod upper section can be movably connected with the keycap;
one end of the elastic contraction element is connected with the upper section of the first connecting rod, the other end of the elastic contraction element is connected with the upper section of the second connecting rod, and the upper section of the first connecting rod and the upper section of the second connecting rod can move towards the approaching direction of each other by applying force;
at least one optical path changing element, which is arranged on one of the first connecting rod, the second connecting rod or the keycap; and
the optical switch circuit unit comprises an optical transmitter and an optical receiver, the optical transmitter and the optical receiver are mutually spaced to form a modulation space, and the optical transmitter transmits an optical signal to the optical receiver;
when the keycap is located at the release position and the first connecting rod and the second connecting rod are located at the first space posture, the optical path changing element and the modulation space have a first space relation, and the optical signal received by the optical receiver has a first intensity;
when the keycap is located at the pressing position and the first connecting rod and the second connecting rod are located at the second space posture, the optical path changing element and the modulation space lose the first space relation, the optical signal received by the optical receiver has a second intensity, and the first intensity is different from the second intensity;
when the key cap moves from the release position to the pressing position, the convex shaft firstly rotates along the first side of the convex part in the smooth inner surface, and then the convex shaft is in sliding and abutting joint with the second side of the convex part.
9. The pushbutton switch as recited in claim 8, wherein the first link and the second link are U-shaped.
10. The pushbutton switch as recited in claim 8, wherein the shaft rotates within the connecting slot, the shaft rotates along a first side of the protrusion on the smooth inner surface during movement of the first link from the first spatial position to the transitional spatial position, the shaft passes over the protrusion to transfer tactile resistance to the first link during movement of the first link from the transitional spatial position to the second spatial position, and the shaft slides against a second side of the protrusion when the first link moves to the second spatial position.
11. The pushbutton switch as recited in claim 10, wherein the protruding shaft is substantially rectangular in cross section, the connecting slot further comprising a first concave portion and a second concave portion, the protruding shaft abutting the first concave portion when the first link is in the first spatial attitude, and the protruding shaft extending into the second concave portion and abutting the convex portion when the first link is in the second spatial attitude.
12. The keyswitch of claim 8 wherein the elastic contracting member is an extension spring, the elastic contracting member extending in a horizontal direction when the first link is in the first spatial position, the elastic contracting member pulling the second link to cause the elastic contracting member to remain extending in the horizontal direction when the first link is in the second spatial position.
13. The pushbutton switch according to claim 8, wherein the pushbutton switch further comprises a first and a second balance bar, the first and second balance bars being substantially U-shaped in shape, the first and second balance bars having a first and a second balance bar opening, respectively, the first and second link bars having a first and a second link bar opening, respectively, the base further comprising a plurality of third base plate connecting portions, the first and second balance bars being pivotally connected to the plurality of third base plate connecting portions and abutting against the key cap, the first balance bar opening facing perpendicular to the orientation of the first link bar opening, the second balance bar opening facing perpendicular to the orientation of the second link bar opening.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910573312.4A CN110379661B (en) | 2019-06-28 | 2019-06-28 | Push-button switch |
| CN202111161230.2A CN114005694B (en) | 2019-06-28 | 2019-06-28 | Key switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910573312.4A CN110379661B (en) | 2019-06-28 | 2019-06-28 | Push-button switch |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111161230.2A Division CN114005694B (en) | 2019-06-28 | 2019-06-28 | Key switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110379661A CN110379661A (en) | 2019-10-25 |
| CN110379661B true CN110379661B (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910573312.4A Active CN110379661B (en) | 2019-06-28 | 2019-06-28 | Push-button switch |
| CN202111161230.2A Active CN114005694B (en) | 2019-06-28 | 2019-06-28 | Key switch |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111161230.2A Active CN114005694B (en) | 2019-06-28 | 2019-06-28 | Key switch |
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| CN (2) | CN110379661B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112185717B (en) * | 2020-09-24 | 2022-05-31 | 联想(北京)有限公司 | Touch device |
| US11923159B2 (en) | 2021-12-16 | 2024-03-05 | Darfon Electronics Corp. | Keyswitch structure and keycap support mechanism thereof |
| US11978598B2 (en) | 2021-12-16 | 2024-05-07 | Darfon Electronics Corp. | Keyswitch structure and lift mechanism thereof |
| TWI802498B (en) | 2021-12-16 | 2023-05-11 | 達方電子股份有限公司 | Keyswitch structur and lift mechanism thereof |
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| CN202025292U (en) * | 2011-04-27 | 2011-11-02 | 苏州达方电子有限公司 | Press key and keyboard |
| CN104299828A (en) * | 2014-07-08 | 2015-01-21 | 东莞市凯华电子有限公司 | Ultra-thin keyboard switch capable of achieving steady pressing |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110379661A (en) | 2019-10-25 |
| CN114005694A (en) | 2022-02-01 |
| CN114005694B (en) | 2023-08-22 |
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