CN114005694B - Key switch - Google Patents
Key switch Download PDFInfo
- Publication number
- CN114005694B CN114005694B CN202111161230.2A CN202111161230A CN114005694B CN 114005694 B CN114005694 B CN 114005694B CN 202111161230 A CN202111161230 A CN 202111161230A CN 114005694 B CN114005694 B CN 114005694B
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- China
- Prior art keywords
- connecting rod
- link
- balance bar
- bottom plate
- opening
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Classifications
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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 key cap, a first connecting rod, a second connecting rod, an elastic contraction element, a touch piece and a thin film circuit unit. The bottom plate includes a plurality of first bottom plate connecting portions and a plurality of second bottom plate connecting portions. The first connecting rod is movably combined with the first bottom plate connecting parts and is movably connected with the keycap. The second connecting rod is movably combined with the second bottom plate connecting parts and is 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 portion. According to the key switch provided by the embodiment of the invention, the film circuit unit or the optical switch circuit unit is used for providing the pressing contact signal, so that the overall size of the key switch can be reduced. Further, the design of the convex portion or the bending elastic portion can provide a sense of paragraph.
Description
The invention is a divisional application of the invention patent with the application number of 201910573312.4, the application date of 2019, 6 month and 28 days and the name of 'key switch'.
Technical Field
The present invention relates to a push-button switch, and more particularly, to a push-button switch with simplified structure.
Background
The conventional key switch includes a signal generating unit, a linkage rod, a paragraph sense generating mechanism, and the like, and the overall size of the key switch is difficult to be reduced because the size of the signal generating unit, the linkage rod, the paragraph sense generating mechanism, and the like is large, and cannot meet the light and thin design requirement. In particular, in order to provide a good signal-generating effect and a segment-feeling effect, the signal generating unit and the segment-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-mentioned problems.
An object of the present invention is to provide a key switch including:
a base plate including a plurality of first base plate connecting portions and a plurality of second base plate connecting portions;
a key cap movable 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 key cap;
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 are movably combined with one of the plurality of second bottom plate connecting parts respectively, and the second connecting rod upper section is 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 force is applied to enable the upper section of the first connecting rod and the upper section of the second connecting rod to move towards each other;
at least one touch piece, the touch piece is arranged on one of the first connecting rod, the second connecting rod or the key cap; and
a thin film circuit unit including a trigger part;
when the key cap is positioned at the release position and the first connecting rod and the second connecting rod are positioned at a first space gesture, the touch piece is separated from the trigger part, and the thin film circuit unit outputs a first electric signal;
when the key cap is positioned at the pressing position and the first connecting rod and the second connecting rod are positioned at the second space gesture, the touch piece presses and touches 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 an embodiment, the first connecting rod and the second connecting rod are both U-shaped, one end of the elastic shrinkage element is connected to the upper section of the first connecting rod, and the other end of the elastic shrinkage element is connected to the upper section of the second connecting rod.
In one embodiment, the thin film circuit element is located between the floor and the key cap.
In an embodiment, the bottom plate is located between the thin film circuit unit and the keycap, 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 against the bottom plate abutting portion, and the touch piece passes through the bottom plate notch to press-touch the trigger portion.
In an embodiment, the first connecting portion includes a protruding shaft, the protruding shaft rotates in the connecting groove, a smooth inner surface and a protruding portion are formed in the connecting groove, the protruding shaft rotates along a first side of the protruding portion in the smooth inner surface when the first connecting rod moves from the first spatial position to the transition spatial position, the protruding shaft passes over the protruding portion to transfer the hand feeling resistance to the first connecting rod when the first connecting rod moves from the transition spatial position to the second spatial position, and the protruding shaft slides to abut against a second side of the protruding portion when the first connecting rod moves to the second spatial position, and the first side and the second side are located on two opposite sides of the protruding portion.
In an embodiment, the cross section of the protruding shaft is substantially rectangular, the connecting groove further includes a first concave portion and a second concave portion, when the first connecting rod is located in the first space posture, the protruding shaft abuts against the first concave portion, and when the first connecting rod is located in the second space posture, the protruding shaft extends into the second concave portion and abuts against the convex portion.
In an embodiment, the bottom plate further includes a fixing boss, the first connecting rod includes a bending elastic portion and a unit connecting portion, one end of the bending elastic portion is connected to the first connecting rod, the other end of the bending elastic portion is connected to the unit connecting portion, the unit connecting portion includes a unit connecting opening, the fixing boss passes through the unit connecting opening, when the first connecting rod moves from the first space posture to the transition space posture, the fixing boss is not abutted against the inner edge of the unit connecting opening yet, when the first connecting rod is about to move from the transition space posture to the second space posture, the fixing boss abuts against the inner edge of the unit connecting opening and pulls the bending elastic portion to deform the bending elastic portion to transfer a hand feeling resistance to the first connecting rod.
In an embodiment, the bending elastic portion has an S-shaped structure, when the first link is located in the first spatial posture, 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 an embodiment, the elastic shrinkage element is an extension spring, when the first link is in the first spatial attitude, the elastic shrinkage element extends along a horizontal direction, and when the first link is in the second spatial attitude, the elastic shrinkage element pulls the second link, so that the elastic shrinkage element still extends along the horizontal direction.
In an 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 have a first balance bar opening and a second balance bar opening, the first link and the second link have a first link opening and a second link opening, the bottom plate further includes a plurality of third bottom plate connecting portions, the first balance bar and the second balance bar are pivoted to the third bottom plate connecting 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.
In another embodiment, the present invention further provides a key switch, including:
a base plate including a plurality of first base plate connecting portions and a plurality of second base plate connecting portions;
a key cap movable 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 key cap;
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 are movably combined with one of the plurality of second bottom plate connecting parts respectively, and the second connecting rod upper section is 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 force is applied to enable the upper section of the first connecting rod and the upper section of the second connecting rod to move towards each other;
at least one light path changing element, which is arranged on one of the first connecting rod, the second connecting rod or the key cap; and
an optical switching circuit unit including a photo-emitter and a photo-receiver which are spaced apart from each other to form a modulation space, the photo-emitter emitting an optical signal toward the photo-receiver;
when the key cap is positioned at the release position and the first connecting rod and the second connecting rod are positioned at a first space posture, the light path changing element and the modulation space have a first space relation, and the light signal received by the light receiver has a first intensity;
when the key cap is positioned at the pressing position and the first connecting rod and the second connecting rod are positioned at a second space posture, the first space relation between the light path changing element and the modulation space is lost, the light signal received by the light receiver has second intensity, and the first intensity is different from the second intensity.
In an embodiment, the first connecting rod and the second connecting rod are both U-shaped, one end of the elastic shrinkage element is connected to the upper section of the first connecting rod, and the other end of the elastic shrinkage element is connected to the upper section of the second connecting rod.
In an embodiment, the first connecting portion includes a protruding shaft, the protruding shaft rotates in the connecting groove, a smooth inner surface and a protruding portion are formed in the connecting groove, the protruding shaft rotates along a first side of the protruding portion in the smooth inner surface when the first connecting rod moves from the first spatial position to the transition spatial position, the protruding shaft passes over the protruding portion to transfer the hand feeling resistance to the first connecting rod when the first connecting rod moves from the transition spatial position to the second spatial position, and the protruding shaft slides to abut against a second side of the protruding portion when the first connecting rod moves to the second spatial position, and the first side and the second side are located on two opposite sides of the protruding portion.
In an embodiment, the cross section of the protruding shaft is substantially rectangular, the connecting groove further includes a first concave portion and a second concave portion, when the first connecting rod is located in the first space posture, the protruding shaft abuts against the first concave portion, and when the first connecting rod is located in the second space posture, the protruding shaft extends into the second concave portion and abuts against the convex portion.
In an embodiment, the bottom plate further includes a fixing boss, the first connecting rod includes a bending elastic portion and a unit connecting portion, one end of the bending elastic portion is connected to the first connecting rod, the other end of the bending elastic portion is connected to the unit connecting portion, the unit connecting portion includes a unit connecting opening, the fixing boss passes through the unit connecting opening, when the first connecting rod moves from the first space posture to the transition space posture, the fixing boss is not abutted against the inner edge of the unit connecting opening yet, when the first connecting rod is about to move from the transition space posture to the second space posture, the fixing boss abuts against the inner edge of the unit connecting opening and pulls the bending elastic portion to deform the bending elastic portion to transfer a hand feeling resistance to the first connecting rod.
In an embodiment, the bending elastic portion has an S-shaped structure, when the first link is located in the first spatial posture, 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 an embodiment, the elastic shrinkage element is an extension spring, when the first link is in the first spatial attitude, the elastic shrinkage element extends along a horizontal direction, and when the first link is in the second spatial attitude, the elastic shrinkage element pulls the second link, so that the elastic shrinkage element still extends along the horizontal direction.
In an 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 have a first balance bar opening and a second balance bar opening, the first link and the second link have a first link opening and a second link opening, the bottom plate further includes a plurality of third bottom plate connecting portions, the first balance bar and the second balance bar are pivoted to the third bottom plate connecting portions and abut against the keycap, 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, the whole size of the key switch can be reduced because the film circuit unit or the optical switch circuit unit provides the pressing contact signal. Further, the design of the convex portion or the bending elastic portion can provide a sense of paragraph. Therefore, the conventional design 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 fully provided.
Drawings
Fig. 1A is an exploded view showing a key switch according to a first embodiment of the present invention.
Fig. 1B is an exploded view of a key switch according to a first embodiment of the present invention.
Fig. 1C is a combination diagram showing a key switch according to a first embodiment of the present invention, wherein the first link and the second link are in a first spatial posture.
Fig. 1D is a combination diagram showing a key switch according to a first embodiment of the present invention, wherein the first link and the second link are in a second spatial posture.
Fig. 1E is a schematic view showing a connection situation of a male shaft and a first base plate connection portion according to a first embodiment of the present invention, wherein a first connecting rod and a second connecting rod are in a first spatial posture.
Fig. 1F is a view showing a connection situation of a male shaft and a first base plate connection portion according to a first embodiment of the present invention, wherein a first link and a second link are in a second spatial posture.
Fig. 2A is a schematic diagram showing a key switch according to a second embodiment of the present invention, in which a first link and a second link are in a first spatial posture.
Fig. 2B is a schematic diagram showing a key switch according to a second embodiment of the present invention, in which the first link and the second link are in a transitional spatial posture.
Fig. 2C is a schematic diagram showing a key switch according to a second embodiment of the present invention, in which the first link and the second link are in a second spatial posture.
Fig. 3A is an exploded view showing a key switch according to a third embodiment of the present invention.
Fig. 3B is an exploded view of a key switch according to a third embodiment of the present invention.
Fig. 3C is a schematic 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 a first spatial posture.
Fig. 3D is a schematic 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 a transitional spatial posture.
Fig. 3E is a schematic 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 a second spatial posture.
Fig. 4 shows a modification of the present invention.
Fig. 5A and 5B are diagrams showing a key switch according to a fourth embodiment of the present invention.
Fig. 6A and 6B are diagrams showing a key switch according to a fifth embodiment of the present invention.
Description of the embodiments
For a further understanding of the objects, construction, features, and functions of the invention, reference should be made to the following detailed description of the preferred embodiments.
Fig. 1A is an exploded view showing a key switch according to a first embodiment of the present invention. Fig. 1B is an exploded view of a key switch according to a first embodiment of the present invention. Fig. 1C and fig. 1D are combined diagrams 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 base plate 3, a key cap 4, a first link 1, a second link 2, an elastic contractile element 5, at least a trigger 61 and a thin film circuit unit 7. The chassis 3 includes a plurality of first chassis connecting portions 31 (fig. 1A, 1B) and a plurality of second chassis connecting portions 32 (fig. 1A, 1B). The key cap 4 is movable up and down between a higher position (the release position of the key cap 4 of fig. 1C) and a lower position (the pressing position of the key cap 4 of fig. 1D). The first link 1 has a first link 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 coupled to one of the plurality of first floor connecting portions 31, respectively, and the first link upper section 13 is movably connected to the key cap 4. The second link 2 has a second link 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 are movably coupled to one of the plurality of second floor connecting portions 32, respectively, and the second link upper section 23 is movably connected to the key cap 4. One end of the elastic contraction element 5 is connected to the first link 1, and the other end of the elastic contraction element 5 is connected to the second link 2, so that the first link upper section 13 and the second link upper section 23 can be moved in the approaching direction to each other by the urging force. The trigger 61 may be selectively provided to 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 trigger 61 is separated from the trigger 71, and the thin film circuit unit 7 outputs the first electrical signal. Referring to fig. 1D, when the key cap 4 is at the lower position and the first link 1 and the second link 2 are at the second spatial posture, the trigger piece 61 presses the trigger portion 71, and the thin film circuit unit 7 outputs a second electrical signal, the first electrical signal being 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 contractive element 5 is connected to the first link upper section 13, and the other end of the elastic contractive element 5 is connected to the second link upper section 23.
In a first embodiment of the present invention, the thin film circuit unit is located between the base plate and the key cap. However, the disclosure is not limited to the present invention, for example, in another embodiment, the bottom plate is located between the thin film circuit unit and the keycap, the upper section of the first link includes an upper section abutment portion, the bottom plate includes a bottom plate abutment portion and a bottom plate notch, and when the first link is in the second spatial posture, the upper section abutment portion abuts against the bottom plate abutment portion, and the touch member presses the trigger portion through the bottom plate notch.
Fig. 1E shows a connection situation of the protruding shaft 14 on the first connecting rod 1 and the first base plate connecting portion 31 according to the first embodiment of the present invention, wherein the first connecting rod 1 and the second connecting rod 2 are in the first spatial posture. Fig. 1F shows a connection between the protruding shaft 14 on the first connecting rod 1 and the first base plate connecting portion 31 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 are diagrams showing 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 protruding portion 314 are formed in the connecting groove 310, the protruding portion 314 has a protruding portion first side 314A and a protruding portion second side 314B, which are located on opposite sides of a top end of the protruding portion 314, the smooth inner surface 313 is adjacent to the connecting protruding 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) later, the protruding shaft 14 slides to the protruding second side 314B beyond the top end of the protruding portion 314, and the protruding portion 314 applies resistance to the protruding shaft 14 to transfer the hand feeling resistance to the first link 1, so that the hand feeling resistance can provide a user with a sense of section representing the key pressing on, and the sense of section is used for simulating the force feedback effect (rubber dome collapse) transferred to the fingers of the user when the bowl-shaped elastomer collapses when the conventional key is turned on.
Referring to fig. 2A, 2B, and 2C, in one embodiment, the cross section of the male shaft 14 is substantially rectangular, the connecting slot 310 has an inner top surface 319, and the inner top surface 319 sequentially includes: a first recess 311, an arcuate downward 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 against the first concave portion 311. When the first link 1 is in the second spatial attitude (fig. 2C), the male shaft 14 protrudes into the second recess 312. In 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 is firstly abutted 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 is inserted into and abutted against the second concave portion 312, thereby providing a smooth rotation effect.
Fig. 3A is an exploded view showing a key switch according to a third embodiment of the present invention. Fig. 3B is an exploded view of a key switch according to a third embodiment of the present invention. Fig. 3C is a schematic 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 a first spatial posture. Fig. 3D is a schematic 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 a transitional spatial posture. Fig. 3E is a schematic 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 a second spatial posture. Referring to fig. 3A, 3B, 3C, 3D and 3E, in this embodiment, the base plate 3 further includes a fixing boss 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 boss 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 in the first spatial position (fig. 3C), the fixed 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 position (fig. 3C) to the transitional spatial position (fig. 3D), the fixed boss 331 has not been abutted against the inner edge of the unit connection opening 153, there is a distance D between the fixed boss 331 and the inner edge of the unit connection opening 153, (3) the first link 1 moves from the transitional spatial position (fig. 3D) to the second spatial position (fig. 3E), and the fixed boss 331 abuts against the inner edge of the unit connection opening 153 and pulls the bending elastic portion 151 to deform the bending elastic portion 151 to transfer the hand feeling resistance to the first link 1. Thus, the hand feeling resistance can provide a user with a section sense representing the key press on.
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 in the first spatial posture, a first angle θ1 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 portion 151 is deformed, a second included angle θ2 is formed between the S-shaped long axis A1 and the first link long axis A2, and the first included angle θ1 is different from the second included angle θ2.
In the above embodiment, the elastic contractive element 5 is an extension spring, and when the first link 1 or the second link 2 is in the first spatial posture, the elastic contractive element 5 extends in the horizontal direction; in addition, since the lower ends of the first link 1 and the second link 2 are engaged with each other to form a 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 the elastic shrinkage element 5 still extends substantially along the horizontal direction when the first link 1 or the second link 2 is in the second spatial posture.
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 connecting portions 33, the first balance bar 81 and the second balance bar 82 are pivoted to the third bottom plate connecting portions 33 and abut against the key cap 4, the first balance bar opening 811 is oriented perpendicularly to the orientation of the first link opening 161, and the second balance bar opening 821 is oriented perpendicularly to the orientation of the second link opening 261.
Referring to fig. 5A and 5B, a key switch B4 according to a fourth embodiment of the present invention is shown, wherein a trigger member 62 is disposed on the key cap 4 to provide a triggering function. Referring to fig. 6A and 6B, a key switch B5 according to a fifth embodiment of the present invention is shown, wherein a trigger member 63 is disposed on the first lower left segment 11 or the first lower right segment 12 to provide a triggering function.
In another embodiment, the present invention further provides a key switch, wherein the 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 optical key switch embodiment can be referred to in patent tw#i 662572 or patent CN108962654a, wherein 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 an embodiment, the light path changing element is disposed on one of the first link, the second link or the key cap. The optical switch circuit unit comprises a light emitter and a light receiver, wherein the light emitter and the light receiver are mutually spaced to form a modulation space, and the light emitter emits optical signals towards the light receiver. When the key cap is positioned at a higher position and the first connecting rod and the second connecting rod are positioned at a first space gesture, the light path changing element and the modulation space have a first space relation, and the light signal received by the light receiver has a first intensity. When the key cap is positioned at a lower position and the first connecting rod and the second connecting rod are positioned at a second space posture, the first space relation between the light path changing element and the modulation space is lost, the light signal received by the light receiver has second intensity, and the first intensity is different from the second intensity.
By applying the key switch provided by the embodiment of the invention, the whole size of the key switch can be reduced because the pressing contact signal is provided by the thin film circuit unit or the optical switch circuit unit. Further, the design of the convex portion or the bending elastic portion can provide a sense of paragraph. Therefore, the conventional design 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 fully provided.
The invention has been described with respect to the above-described embodiments, however, the above-described embodiments are merely examples of practicing the invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (11)
1. A push button switch, comprising:
a base plate including a plurality of first base plate connecting portions and a plurality of second base plate connecting portions;
a key cap movable 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 key cap;
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 are movably combined with one of the plurality of second bottom plate connecting parts respectively, and the second connecting rod upper section is 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 force is applied to enable the upper section of the first connecting rod and the upper section of the second connecting rod to move towards each other;
at least one touch piece, the touch piece is set up in one of the first connecting rod, the second connecting rod or the key cap; and
a thin film circuit unit including a trigger part;
when the key cap is positioned at the release position and the first connecting rod and the second connecting rod are positioned at a first space gesture, the touch piece is separated from the trigger part, and the thin film circuit unit outputs a first electric signal;
when the key cap is positioned at the pressing position and the first connecting rod and the second connecting rod are positioned at a second space gesture, the touch piece presses and touches 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 bottom plate further comprises a fixed convex column, the first connecting rod comprises a bending elastic part and a unit connecting part, one end of the bending elastic part is connected with the first connecting rod, the other end of the bending elastic part is connected with the unit connecting part, the unit connecting part comprises a unit connecting opening, the fixed convex column penetrates through the unit connecting opening, when the first connecting rod moves from the first space posture to the transition space posture, the fixed convex column is not abutted against the inner edge of the unit connecting opening, and when the first connecting rod is to move from the transition space posture to the second space posture, the fixed convex column abuts against the inner edge of the unit connecting opening and pulls the bending elastic part to deform the bending elastic part so as to transfer a hand feeling resistance to the first connecting rod.
2. The key switch of claim 1, wherein the first link and the second link are each U-shaped, and the resilient contractive element connects the upper section of the first link and the upper section of the second link.
3. The key switch of claim 2, wherein the thin film circuit unit is located between the base plate and the key cap; or,
the bottom plate is positioned 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 in the second space posture, the upper section abutting part abuts against the bottom plate abutting part, and the touch piece is pressed and contacted with the trigger part through the bottom plate notch.
4. The key switch of claim 1, wherein the bending elastic portion has an S-shaped structure, and when the first link is located in the first spatial position, a first angle is formed between a long axis of the S-shaped structure and a long axis of the first link, and when the bending elastic portion is deformed, a second angle is formed between the long axis of the S-shaped structure and the long axis of the first link, and the first angle is different from the second angle.
5. The key switch of claim 1, wherein the elastically contractible element is an extension spring, and extends in a horizontal direction when the first link is in the first spatial position, and pulls the second link when the first link is in the second spatial position, so that the elastically contractible element still extends in the horizontal direction.
6. The key switch of claim 1, further comprising a first balance bar and a second balance bar, wherein the first balance bar and the second balance bar are U-shaped, the first balance bar and the second balance bar have a first balance bar opening and a second balance bar opening, the first link and the second link have a first link opening and a second link opening, respectively, the bottom plate further comprises a plurality of third bottom plate connecting portions, the first balance bar and the second balance bar are pivoted to the third bottom plate connecting portions and abut against the keycap, the first balance bar opening is oriented perpendicular to the orientation of the first link opening, and the second balance bar opening is oriented perpendicular to the orientation of the second link opening.
7. A push button switch, comprising:
a base plate including a plurality of first base plate connecting portions and a plurality of second base plate connecting portions;
a key cap movable 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 key cap;
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 are movably combined with one of the plurality of second bottom plate connecting parts respectively, and the second connecting rod upper section is 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 force is applied to enable the upper section of the first connecting rod and the upper section of the second connecting rod to move towards each other;
at least one light path changing element, which is arranged on one of the first connecting rod, the second connecting rod or the key cap; and
an optical switching circuit unit including a photo-emitter and a photo-receiver which are spaced apart from each other to form a modulation space, the photo-emitter emitting an optical signal toward the photo-receiver;
when the key cap is positioned at the release position and the first connecting rod and the second connecting rod are positioned at a first space posture, the light path changing element and the modulation space have a first space relation, and the light signal received by the light receiver has a first intensity;
when the key cap is positioned at the pressing position and the first connecting rod and the second connecting rod are positioned at a second space posture, the first space relation between the light path changing element and the modulation space is lost, the light signal received by the light receiver has second intensity, and the first intensity is different from the second intensity;
the bottom plate further comprises a fixed convex column, the first connecting rod comprises a bending elastic part and a unit connecting part, one end of the bending elastic part is connected with the first connecting rod, the other end of the bending elastic part is connected with the unit connecting part, the unit connecting part comprises a unit connecting opening, the fixed convex column penetrates through the unit connecting opening, when the first connecting rod moves from the first space posture to the transition space posture, the fixed convex column is not abutted against the inner edge of the unit connecting opening, and when the first connecting rod is to move from the transition space posture to the second space posture, the fixed convex column abuts against the inner edge of the unit connecting opening and pulls the bending elastic part to deform the bending elastic part so as to transfer a hand feeling resistance to the first connecting rod.
8. The key switch of claim 7, wherein the first link and the second link are each U-shaped.
9. The key switch of claim 7, wherein the bending elastic portion has an S-shaped structure, and when the first link is in the first spatial posture, a first angle is formed between a long axis of the S-shaped structure and a long axis of the first link, and when the bending elastic portion is deformed, a second angle is formed between the long axis of the S-shaped structure and the long axis of the first link, and the first angle is different from the second angle.
10. The key switch of claim 7, wherein the elastically contractible element is an extension spring, and extends in a horizontal direction when the first link is in the first spatial position, and pulls the second link when the first link is in the second spatial position, so that the elastically contractible element still extends in the horizontal direction.
11. The key switch of claim 7, further comprising a first balance bar and a second balance bar, the first balance bar and the second balance bar having a U-shape, the first balance bar and the second balance bar each having a first balance bar opening and a second balance bar opening, the first link and the second link each having a first link opening and a second link opening, the bottom plate further comprising a plurality of third bottom plate connecting portions, the first balance bar and the second balance bar pivotally connecting the plurality of third bottom plate connecting portions and abutting the keycap, the first balance bar opening oriented perpendicular to the orientation of the first link opening, the second balance bar opening oriented perpendicular to the orientation of the second link opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111161230.2A CN114005694B (en) | 2019-06-28 | 2019-06-28 | Key switch |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111161230.2A CN114005694B (en) | 2019-06-28 | 2019-06-28 | Key switch |
| CN201910573312.4A CN110379661B (en) | 2019-06-28 | 2019-06-28 | Push-button switch |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910573312.4A Division CN110379661B (en) | 2019-06-28 | 2019-06-28 | Push-button switch |
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| Publication Number | Publication Date |
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| CN114005694A CN114005694A (en) | 2022-02-01 |
| CN114005694B true CN114005694B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111161230.2A Active CN114005694B (en) | 2019-06-28 | 2019-06-28 | Key switch |
| CN201910573312.4A Active CN110379661B (en) | 2019-06-28 | 2019-06-28 | Push-button switch |
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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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112185717B (en) * | 2020-09-24 | 2022-05-31 | 联想(北京)有限公司 | Touch device |
| CN113299512A (en) * | 2021-06-24 | 2021-08-24 | 广东瑞讯电子科技有限公司 | Ultra-thin key |
| TWI802498B (en) | 2021-12-16 | 2023-05-11 | 達方電子股份有限公司 | Keyswitch structur and lift mechanism thereof |
| US11978598B2 (en) | 2021-12-16 | 2024-05-07 | Darfon Electronics Corp. | Keyswitch structure and lift mechanism thereof |
| US12080492B2 (en) | 2021-12-16 | 2024-09-03 | Darfon Electronics Corp. | Keyswitch structure and lift mechanism thereof |
| US11923159B2 (en) | 2021-12-16 | 2024-03-05 | Darfon Electronics Corp. | Keyswitch structure and keycap support mechanism thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110379661A (en) | 2019-10-25 |
| CN110379661B (en) | 2022-04-15 |
| CN114005694A (en) | 2022-02-01 |
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