Improved ultrathin key switch

Abstract

The utility model discloses an improved ultrathin key switch, which is used for triggering a light pair tube assembly arranged on a PCB (printed circuit board) to generate signals and comprises a key cap, a bottom plate and a linkage component arranged between the key cap and the bottom plate, the light pair tube assembly consists of a light-emitting element and a light-sensitive element, the PCB is arranged on the bottom plate, the linkage component comprises two wing arms which are pivoted with each other, and the two wing arms are arranged on the bottom plate. A reset tension spring is further connected between the two wing arms, U-shaped grooves used for being connected with the reset tension spring are formed in the two wing arms, the two ends of the reset tension spring are hooked to the U-shaped grooves of the two wing arms respectively, the light-emitting element and the light-sensitive element are located on the two sides of the reset tension spring respectively, and the reset tension spring is also a grating. The U-shaped groove is formed in the wing arm, the connecting stress of the reset tension spring hooked on the wing arm is dispersed, the switch is more stable to use, the reset tension spring provides a stable reset function, sensitive triggering of the switch is ensured, and smooth and rapid experience is brought to a user.

Description

Technical Field

[0001] The utility model relates to a key switch, in particular to an improved ultra-thin key switch. Background Art

[0002] Patent No. 202122203647.2, a utility model patent named "An ultra-thin balanced press photoelectric button structure", proposes a button design that uses a grating wing to trigger a photoelectric signal function and resets it using a reset torsion spring; during production and processing, we found that the torsion spring reset structure and the shaft limit design involved in this patent have some potential problems.

[0003] First, regarding the design of the torsion spring reset structure. The patent opens connection holes on both sides of the connecting wings and fixes the hooks of the torsion spring on the connection holes to achieve the reset function. However, this design method has the problem of insufficient strength of the connecting wings. Since the structure of the connecting wings themselves is relatively thin, their strength may not be able to support the torsion generated by the torsion spring, which may cause the connecting wings to deform or break when used for a long time or under great pressure, thereby affecting the normal operation of the keys.

[0004] Secondly, regarding the limiting structure of the connecting wing. The patent installs the limiting structure on the bottom plate, but the thickness of the bottom plate is limited, which may cause the limiting plate on the bottom plate to be easily damaged during the manufacturing and installation process. In addition, the stability and accuracy of the limiting structure are also affected by the bottom plate material and processing technology. If the bottom plate material strength is insufficient or the processing technology is not up to standard, the limiting structure may fail, thereby affecting the pressing balance and stability of the key.

[0005] Therefore, in view of the above problems, the present application proposes an improved ultra-thin key switch. Utility Model Content

[0006] In view of the above problems, the utility model aims to provide an improved ultra-thin key switch.

[0007] To achieve the technical purpose, the scheme of the utility model is: an improved ultra-thin key switch, used for triggering a light-pairing tube assembly arranged on a PCB board to generate a signal, comprising a keycap, a base plate and a linkage component arranged between the keycap and the base plate, the light-pairing tube assembly is composed of a light-emitting element and a photosensitive element, the PCB board is arranged on the base plate, the linkage component comprises two wing arms pivotally connected to each other, a reset spring is also connected between the two wing arms, a U-shaped groove for connecting the reset spring is constructed on the two wing arms, the two ends of the reset spring are respectively hooked on the U-shaped grooves of the two wing arms, the light-emitting element and the photosensitive element are separated on both sides of the reset spring, and the reset spring also serves as a grating; when the keycap is pressed, the two wing arms move downward to drive the reset spring downward to affect the light path between the light-pairing tubes to generate a signal; when the keycap is released, the reset spring contracts to reset the two wing arms upward.

[0008] Preferably, the push button switch also includes a pressure plate, and both wing arms are provided with a pair of inwardly extending limiting protrusions, the pressure plate is placed between the two wing arms, and the pressure plate is engaged with the limiting protrusions of the two wing arms to limit the wing arms.

[0009] Preferably, the pressure plate is provided with an air-avoiding groove capable of accommodating a reset tension spring, and both ends of the air-avoiding groove are provided with recessed grooves flush with the U-shaped groove.

[0010] Preferably, a receiving groove for receiving the light-emitting element and the photosensitive element is provided in the pressing plate, and the receiving groove of the photosensitive element has a shading structure at the top and both sides.

[0011] Preferably, light-transmitting holes are provided on both sides of the air-avoiding groove, and the photosensitive element and the light-emitting element are located on both sides of the light-transmitting holes so that light energy of the light-emitting element can be transmitted to the photosensitive element through the light-transmitting holes.

[0012] Preferably, a bending plate for fixing the pressure plate is provided on the bottom plate, and guide blocks matching the bending plate are provided at both ends of the pressure plate; positioning holes matching the wing arm limiting bosses are provided on the left and right sides of the guide blocks.

[0013] Preferably, the PCB board is further provided with LED lamp beads, and the pressing plate is provided with lamp grooves for accommodating the LED lamp beads.

[0014] Preferably, both the base plate and the PCB board are provided with I-shaped grooves; the bottom of the pressure plate is provided with a positioning block matching the I-shaped groove; and the wing arm is provided with a reinforcing block matching the I-shaped groove around the bottom of the U-shaped groove.

[0015] The beneficial effects of the utility model are as follows: the present application provides a U-shaped groove on the wing arm to disperse the connection stress of the reset spring hooked on the wing arm, so that the switch is more stable to use, and the reset spring not only provides a stable reset function, but also ensures the sensitive triggering of the switch, bringing a smooth and fast experience to the user; in addition, the wing arm is limited on the pressure plate to enhance the overall structural strength, so that the key switch can still maintain good stability during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded view of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the wing arm in the utility model;

[0018] Figure 3 This is one of the structural schematic diagrams of the pressing plate in the utility model;

[0019] Figure 4This is the second structural schematic diagram of the pressing plate in the utility model;

[0020] Figure 5 It is a schematic diagram of the structure in which the wing arm of the utility model is placed on the bottom plate;

[0021] Figure 6 It is a schematic diagram of the structure of the wing arm rising in the utility model;

[0022] Figure 7 It is a structural schematic diagram of the wing arm in the utility model in a horizontal state;

[0023] Figure 8 It is a structural schematic diagram of the pressing plate in the utility model being placed on the bottom plate.

[0024] In the figure: 1. keycap; 2. reset spring; 3. pressure plate; 301. air avoidance groove; 302. sink groove; 303. accommodation groove; 304. light-transmitting hole; 305. lamp groove; 306. guide block; 307. positioning hole; 308. positioning block; 309. shading structure; 4. wing arm; 401. U-shaped groove; 402. limiting boss; 403. reinforcement block; 5. photosensitive element; 6. LED lamp bead; 7. light-emitting element; 8. PCB board; 9. bottom plate; 901. bending plate; 10. I-shaped groove. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In order to clearly and completely describe the technical solution, the following embodiments are selected for illustration; the following embodiments are part of the embodiments of the utility model; based on this application, other embodiments obtained without creative work are all within the scope of protection of the utility model.

[0026] In the following embodiments, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of clearly describing the present embodiment, rather than indicating or implying that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present application. At the same time, "first" and "second" in the embodiments are only used for distinguishing description purposes, and do not represent or imply relative importance.

[0027] like Figure 1-8As shown, the specific embodiment of the utility model is an improved ultra-thin key switch, which is used to trigger the light-to-tube assembly arranged on the PCB board 8 to generate a signal, including a key cap 1, a base plate 9 and a linkage component arranged between the key cap 1 and the base plate 9, the light-to-tube assembly is composed of a light-emitting element 7 and a photosensitive element 5, the PCB board 8 is arranged on the base plate 9, the linkage component includes two wing arms 4 pivotally connected to each other, a reset spring 2 is also connected between the two wing arms 4, and U-shaped grooves for connecting the reset spring 2 are constructed on the two wing arms 4. The two ends of the reset spring 2 are respectively hooked on the U-shaped grooves of the two wing arms 4. Different from the previous connection hole connection, the U-shaped groove structure can bring a more stable connection. The design of the U-shaped groove makes the contact area between the two ends of the reset spring 2 and the wing arm 4 larger, which is easier to install. The two ends of the reset spring 2 can be firmly hooked on the two wing arms 4, and the concentrated stress of the hook is dispersed, the concentrated wear on the specific area is reduced, and the durability of the switch is enhanced; the space on the two wing arms 4 is maximized, so that the structure of the entire switch is more compact, which meets the requirements of ultra-thin design.

[0028] The innovation of the present application is that the reset spring 2 also serves as a grating; the light emitting element 7 and the photosensitive element 5 are separated on both sides of the reset spring 2. When the key cap 1 is pressed, the two wing arms 4 move downward to drive the reset spring 2 downward to affect the light path between the light pair tubes to generate a signal; when the key cap 1 is released, the reset spring 2 contracts to reset the two wing arms 4 upward. The ingenious design of the reset spring 2 not only provides a stable reset function, but also ensures sensitive triggering of the switch.

[0029] In order to limit the bottom of the wing arm 4, the push switch also includes a pressure plate 3. The two wing arms 4 are each provided with a pair of limiting protrusions 402 extending inwardly. The pressure plate 3 is placed between the two wing arms 4. The pressure plate 3 is buckled onto the limiting protrusions 402 of the two wing arms 4 to limit the wing arms 4.

[0030] In order to allow enough space for the reset spring 2 to descend, the pressure plate 3 is provided with an air avoidance groove 301 that can accommodate the reset spring 2, and both ends of the air avoidance groove 301 are provided with sink grooves 302 flush with the U-shaped groove, so that the two ends of the reset spring 2 can pass through the sink groove 302 and be hooked on the U-shaped groove.

[0031] In order to allow enough space on the pressing plate 3 for placing the light-emitting element 7 and the photosensitive element 5, a receiving groove 303 for accommodating the light-emitting element 7 and the photosensitive element 5 is opened in the pressing plate 3. The receiving groove 303 of the photosensitive element 5 has a shading structure 309 on the top and both sides. In order to prevent the light of the LED lamp bead from affecting the photosensitive element 5, a shading structure 309 is provided between the photosensitive element 5 and the LED lamp bead so that the signal can be stably triggered.

[0032] Among them, light-transmitting holes 304 are opened on both sides of the air-avoiding groove 301, and the photosensitive element 5 and the light-emitting element 7 are located on both sides of the light-transmitting hole 304 so that the light of the light-emitting element 7 can be transmitted to the photosensitive element 5 through the light-transmitting hole 304. When the reset tension spring 2 covers the light-transmitting hole 304 downward, the light of the light-emitting element 7 cannot be transmitted to the photosensitive element 5.

[0033] In order to strengthen the installation of the base plate 9, a bending plate 901 for fixing the pressure plate 3 is provided on the base plate 9, and guide blocks 306 matching the bending plate 901 are provided at both ends of the pressure plate 3. After the pressure plate 3 is placed on the base plate 9 and the PCB board, the bending plate 901 is bent onto the guide block 306 to limit the pressure plate 3; positioning holes 307 matching the limiting boss 402 of the wing arm 4 are opened on the left and right sides of the guide block 306 to limit the limiting boss 402 of the wing arm 4.

[0034] In order to enable the switch to emit colorful light, LED lamp beads 6 are further provided on the PCB board 8 , and a lamp groove 305 for accommodating the LED lamp beads 6 is opened on the pressing plate 3 .

[0035] In order to make the pressure plate 3 more tightly combined with the base plate 9 and the PCB board 8, an I-shaped groove 10 is opened on the base plate 9 and the PCB board 8; a positioning block 308 matching the I-shaped groove 10 is provided at the bottom of the pressure plate 3; and a reinforcing block 403 matching the I-shaped groove 10 is provided around the bottom of the U-shaped groove of the wing arm 4, which can increase the strength of the wing arm 4 without increasing the overall thickness.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. An improved ultra-thin key switch, used for triggering a light-on-tube assembly arranged on a PCB to generate a signal, comprising a key cap, a base plate and a linkage member arranged between the key cap and the base plate, wherein the light-on-tube assembly is composed of a light-emitting element and a photosensitive element, the PCB board is arranged on the base plate, the linkage member comprises two wing arms pivotally connected to each other, and a reset tension spring is further connected between the two wing arms, characterized in that: Both wing arms are provided with U-shaped grooves for connecting the reset springs, and the two ends of the reset springs are respectively hooked on the U-shaped grooves of the two wing arms, and the light-emitting element and the photosensitive element are separated on both sides of the reset springs, and the reset springs also serve as gratings; when the keycap is pressed, the two wing arms move downward to drive the reset springs downward to affect the optical path between the light-pair tubes to generate signals; when the keycap is released, the reset springs contract to reset the two wing arms upward.

2. The improved ultra-thin key switch according to claim 1, characterized in that: The push button switch also includes a pressure plate. Both wing arms are provided with a pair of inwardly extending limiting protrusions. The pressure plate is placed between the two wing arms. The pressure plate is buckled on the limiting protrusions of the two wing arms to limit the wing arms.

3. The improved ultra-thin key switch according to claim 2, characterized in that: The pressure plate is provided with an escape groove capable of accommodating a reset tension spring, and both ends of the escape groove are provided with sink grooves flush with the U-shaped groove.

4. The improved ultra-thin key switch according to claim 3, characterized in that: The pressing plate is provided with a receiving groove for receiving the light-emitting element and the photosensitive element. The receiving groove of the photosensitive element has a light-shielding structure at the top and both sides.

5. The improved ultra-thin key switch according to claim 4, characterized in that: Light-transmitting holes are provided on both sides of the air-avoiding groove, and the photosensitive element and the light-emitting element are located on both sides of the light-transmitting holes so that the light energy of the light-emitting element is transmitted to the photosensitive element through the light-transmitting holes.

6. The improved ultra-thin key switch according to claim 2, characterized in that: The bottom plate is provided with a bending plate for fixing the pressing plate, and guide blocks matching the bending plate are provided at both ends of the pressing plate; positioning holes matching the wing arm limiting bosses are provided on the left and right sides of the guide blocks.

7. The improved ultra-thin key switch according to claim 2, characterized in that: The PCB board is also provided with LED lamp beads, and the pressing plate is provided with lamp grooves for accommodating the LED lamp beads.

8. The improved ultra-thin key switch according to claim 2, characterized in that: The bottom plate and the PCB board are both provided with I-shaped grooves; the bottom of the pressing plate is provided with a positioning block matching the I-shaped groove; and the wing arm is provided with a reinforcing block matching the I-shaped groove around the bottom of the U-shaped groove.

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