A sealed push button switch

Abstract

The present invention discloses a sealed key switch, wherein a base is arranged on a substrate, a mounting groove and a sealing groove are arranged at one end of the base, the sealing groove is arranged outside the mounting groove, and the sealing groove is filled with sealing oil, a light-emitting component is also arranged on one side of the base, a terminal component is arranged in the mounting groove, the light-emitting component and the terminal component are electrically connected to a PCB board respectively, a groove is arranged at one end of the key, a key cap is arranged at the other end, the side wall of the groove is inserted in the sealing groove, a pressing column is arranged in the groove, a spring is arranged in the sealing groove, and the two ends abut against the bottom of the groove and the bottom of the sealing groove respectively, the shell is connected to the base, and the end of the key inserted in the sealing groove is limited. The present invention fills the sealing groove with sealing oil so that the groove and the mounting groove form a closed inner cavity, thereby achieving dustproof and waterproof effects, preventing dust or water vapor from entering the mounting groove, corroding and clogging the terminal component and the moving piece, and finally improving the service life of the key switch.

Description

Technical Field

[0001] The present invention relates to the technical field of switches, and in particular to a sealed key switch. Background Art

[0002] The key switch mainly refers to the light-touch key switch, also known as the light-touch switch. The key switch is an electronic switch belonging to the category of electronic components. It first appeared in Japan [called: sensitive switch]. When in use, the switch function is closed and connected by applying pressure in the direction of the switch operation under the condition of satisfying the operating force. When the pressure is removed, the switch is disconnected. Its internal structure relies on the change of force on the metal spring to achieve on and off.

[0003] The keyboard key switch is an important part of the keyboard. The existing keyboard key switches are not waterproof. Therefore, dust particles and water vapor in the air will enter the interior of the switch and the connection gaps of the switch components through the gaps of the keyboard key switch, thereby increasing the friction of the keyboard key switch components. When the switch moves back and forth, it is easy to cause wear of the components. Moreover, excessive dust accumulation will directly block the switch and cause key failure. In addition, water vapor entering the electrical connection of the switch will corrode circuit components and reduce the service life of the keyboard key switch. Summary of the invention

[0004] The object of the present invention is to provide a sealed key switch which has a simple structure, is waterproof and dustproof, and has a long service life.

[0005] To solve the above technical problems, the present invention can be implemented by adopting the following technical solutions:

[0006] A sealed push button switch comprises a base, which is arranged on a substrate, and an inwardly recessed mounting groove and a sealing groove are arranged at one end of the base, the sealing groove is arranged on the outside of the mounting groove, and the sealing groove is filled with sealing oil, a light-emitting component is also arranged on one side of the base, and a terminal component is arranged in the mounting groove, and the light-emitting component and the terminal component are respectively electrically connected to a PCB board under the substrate; a push-button, one end of the push-button is provided with a groove, and the other end is provided with a key cap, the side wall of the groove is inserted in the sealing groove, so that the groove and the mounting groove form an inner cavity, and the inner cavity forms a closed space through the sealing oil, and a pressing column is arranged in the groove; a spring, the spring is arranged in the sealing groove, and the two ends of the spring respectively abut the bottom of the groove and the bottom of the sealing groove; a shell, the shell is connected to the base, and limits the end of the push-button inserted in the sealing groove.

[0007] In one embodiment, the terminal assembly includes a first static terminal, a second static terminal and a movable plate, one end of the first static terminal is in contact with one end of the movable plate, and the other end of the movable plate is connected or disconnected with one end of the second static terminal by pressing a pressing column, and the other ends of the first static terminal and the second static terminal extend from the mounting groove to the outside of the base and are electrically connected to the PCB board.

[0008] In one embodiment, a card slot is provided at the bottom of the installation slot, the movable piece is provided in the card slot, the first static terminal and the second static terminal are respectively provided on both sides of the card slot, and the first static terminal and the second static terminal are connected to the base by plastic coating.

[0009] In one embodiment, the movable piece is in an inverted 'U' shape, one end of which is arranged in the card slot and contacts the first static terminal, and the other end is provided with a contact part, and spring-pressing parts are respectively provided on both sides of the contact part. When the button is pressed, the pressing column acts on the spring-pressing part to make the contact part contact or cut off with the second static terminal.

[0010] In one embodiment, corresponding limiting grooves are respectively provided on the lower outer wall of the base and the outer wall of the shell, the light-emitting component includes an LED lamp and a translucent lampshade, the LED lamp is electrically connected to the PCB board in a surface mount manner, the translucent lampshade is arranged in the limiting groove and above the LED lamp to transmit the light source emitted by the LED lamp.

[0011] In one of the embodiments, a limiting socket is provided on one side of the housing, the light-emitting component is a light-emitting diode, the light-emitting diode is provided on one side of the base through the limiting socket, and is plug-in electrically connected to the PCB board.

[0012] In one of the embodiments, four sliding grooves are arranged on the inner wall of the sealing groove, and sliding blocks corresponding to the four sliding grooves are arranged on the outer wall of the button. When the button is pressed, the four sliding grooves and the corresponding sliding blocks can enable the button to slide up and down in a balanced manner.

[0013] In one of the embodiments, a plurality of protrusions are provided on the outer wall of the upper portion of the base, and a plurality of bayonet holes corresponding to the plurality of protrusions are provided on the side wall of the shell, and the shell is connected and fixed to the base by the protrusions snapping into the bayonet holes.

[0014] The beneficial effects of the present invention are:

[0015] 1. Simple structure. The sealed push button switch of the present invention is mainly assembled from a base, a push button, a terminal assembly, a light emitting assembly, a spring and a housing. It has few components. The base is arranged on a substrate, and the terminal assembly and the light emitting assembly are respectively connected to a PCB board, so that the connection between the components is reasonable and the structure is simple. A mounting groove and a sealing groove are respectively arranged at one end of the base, and a groove is arranged at one end of the push button, and the side wall of the groove is inserted into the sealing groove, so that the pressing column in the groove acts on the moving piece. When the push button is pressed, the moving piece is connected and disconnected with the second static terminal, so as to realize the conduction and disconnection of the signal.

[0016] Second, waterproof and dustproof, and long service life. The sealed key switch of the present invention has a groove side wall of the key inserted in the sealing groove, and the sealing groove is arranged on the outside of the mounting groove, so that an inner cavity is formed between the groove and the mounting groove. In order to achieve sealing, the sealing groove is filled with sealing oil, and the inner cavity is formed into a closed space by the sealing oil, thereby achieving dustproof and waterproof effects, preventing dust or water vapor from entering the mounting groove to corrode and clog the terminal assembly, and finally, prolonging the service life of the key switch;

[0017] 3. Good practicality. A light-emitting component is arranged on one side of the base, and the light-emitting component is electrically connected to the PCB board. The light source is emitted by the light-emitting component to illuminate various symbols on the keycaps of the key switch, so that the key switch can be used in situations with poor vision, thereby making the key switch highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure decomposition of a sealed push button switch embodiment 1 of the present invention;

[0019] Figure 2 A cross-sectional view of a sealed push button switch embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the base and housing structure of a sealed push button switch embodiment 1 of the present invention;

[0021] Figure 4 This is a schematic diagram of the key structure of a sealed key switch embodiment 1 of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of a terminal assembly of a sealed push button switch embodiment 1 of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure decomposition of the second embodiment of the sealed push button switch of the present invention;

[0024] Figure 7 This is a schematic diagram of the base and shell structure of the second embodiment of the sealed push button switch of the present invention.

[0025] As shown in the accompanying drawings: 100, base; 110, mounting groove; 120, sealing groove; 130, sealing oil; 140, limiting groove; 150, sliding groove; 160, protrusion; 200, substrate; 300, light-emitting component; 310, LED lamp; 320, translucent lampshade; 330, light-emitting diode; 400, terminal component; 410, first static terminal; 420, second static terminal; 430, moving piece; 431, contact part; 432, spring-pressing part; 310, contact part; 320, spring-pressing part; 500, PCB board; 600, button; 610, groove; 620, pressing column; 630, sliding block; 700, keycap; 800, spring; 900, housing; 910, bayonet; 920, limiting jack. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only."

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] Embodiment 1:

[0030] See also Figures 1 to 5A sealed push button switch includes a base 100, the base 100 is arranged on a substrate 200, an inwardly recessed mounting groove 110 and a sealing groove 120 are arranged at one end of the base 100, the sealing groove 120 is arranged on the outside of the mounting groove 110, and the sealing groove 120 is filled with sealing oil 130, a light emitting component 300 is also arranged on one side of the base 100, and a terminal component 400 is arranged in the mounting groove 110, the light emitting component 300 and the terminal component 400 are respectively electrically connected to a PCB board 500 below the substrate 200; a push button 600, the push button 600 A groove 610 is provided at one end of 00, and a keycap 700 is provided at the other end. The side wall of the groove 610 is inserted in the sealing groove 120, so that the groove 610 and the installation groove 110 form an inner cavity, and the inner cavity forms a closed space through the sealing oil 130. A pressing column 620 is provided in the groove 610; a spring 800, the spring 800 is arranged in the sealing groove 120, and the two ends of the spring 800 respectively abut the bottom of the groove 610 and the bottom of the sealing groove 120; a shell 900, the shell 900 is connected to the base 100, and limits the end of the button 600 inserted in the sealing groove 120.

[0031] Specifically, in this embodiment, the push button switch is mainly assembled by a base 100, a push button 600, a terminal assembly 400, a light emitting assembly 300, a spring 800 and a housing 900, and has few components and a simple structure; an inwardly recessed mounting groove 110 is provided at one end of the base 100, and the terminal assembly 400 is arranged in the mounting groove 110. At the same time, an inwardly recessed sealing groove 120 is also provided at this end of the base 100, and the sealing groove 120 is arranged on the outside of the mounting groove 110, and a groove 610 is provided at one end of the push button 600. The side wall of the groove 610 is inserted into the sealing groove 120, so that an inner cavity is formed between the groove 610 of the button 600 and the mounting groove 110 of the base 100. In order to achieve dustproof and waterproof effects, the sealing groove 120 is also filled with sealing oil 130, wherein the sealing oil 130 is in a paste state, so the sealing oil 130 will not flow to the outside, thereby forming a closed space in the inner cavity to achieve dustproof and waterproof effects, prevent dust or water vapor from entering the mounting groove, and cause corrosion or blockage to the terminal assembly 400, and ultimately increase the service life of the key switch.

[0032] Because the button 600 needs to act on the terminal assembly 400 when being pressed, a pressing column 620 is provided in the groove 610 of the button 600. At the same time, a spring 800 is provided in the sealing groove 120, and the two ends of the spring 800 are respectively abutted against the bottom of the sealing groove 120 and the bottom of the groove 610. When the button 600 is pressed, the pressing column 620 acts on the terminal assembly 400 to make the signal of the terminal assembly 400 conductive. When the button 600 is released, the button 600 will be reset by the reaction force of the spring 600, thereby loosening the pressing column 620 from the terminal assembly 400, thereby cutting off the signal.

[0033] In addition, since one end of the spring 800 is in contact with the sealing groove 120, the paste-like sealing oil 130 can also form a seal on the end of the spring 800 that is in contact with the sealing groove 120 without affecting the operation of the spring 800, thereby making the design of the micro switch reasonable.

[0034] The sealed key switch of the present invention further includes a light emitting component 300, which is disposed on one side of the base 100 and the housing 900 after being covered and connected, and the light emitting component 300 is electrically connected to the PCB board 500. The light emitting component 300 emits light to illuminate various symbols on the keycap 700 on the key 600, so that the key switch can be used in situations where visibility is poor, thereby making the key switch highly practical.

[0035] See also Figure 5 The terminal assembly 400 includes a first static terminal 410, a second static terminal 420 and a movable piece 430. One end of the first static terminal 410 contacts one end of the movable piece 430, and the other end of the movable piece 430 is connected or disconnected with one end of the second static terminal 420 by pressing the pressing column 620. The other ends of the first static terminal 410 and the second static terminal 420 extend from the mounting groove 110 to the outside of the base 100 and are electrically connected to the PCB board 500.

[0036] In this embodiment, the terminal assembly 400 includes a first static terminal 410, a second static terminal 420 and a movable plate 430, and they are respectively arranged in a closed mounting groove 110, wherein one end of the first static terminal 410 is fixedly contacted with one end of the movable plate 430, and the other end of the movable plate 430 is connected or disconnected with one end of the second static terminal 420 under the action of the pressing column 620, and the other ends of the first static terminal 410 and the second static terminal 420 extend from the mounting groove 110 of the base 100 to the outside of the base 100 and are electrically connected to the PCB board 500, and the base 100 is installed on the substrate 200.

[0037] See also Figure 2 and Figure 3A card slot 140 is provided at the bottom of the mounting slot 110, the movable piece 430 is provided in the card slot 140, the first static terminal 410 and the second static terminal 420 are respectively provided on both sides of the card slot 140, and the first static terminal 410 and the second static terminal 420 are connected to the base 100 by plastic coating.

[0038] Because the terminal assembly 400 includes a first static terminal 410 and a second static terminal 420, wherein the first static terminal 410 and the second static terminal 420 are connected to the base 100 by means of plastic wrapping, a gap between the connection between the terminal assembly 400 and the base 100 can be avoided, thereby improving the sealing effect; and a card slot 140 is provided in the installation groove 110 of the base 100, and the movable piece 430 is inserted into the card slot 140. At the same time, the first static terminal 410 and the second static terminal 420 are respectively provided on both sides of the card slot 140, and are reasonably connected to the movable piece 430, so that the connection structure of the first static terminal 410, the second static terminal 420, the movable piece 430 and the base 100 is simple and reasonable.

[0039] See also Figure 5 The movable piece 430 is in an inverted 'U' shape, one end of which is arranged in the slot 140 and contacts the first static terminal 410, and the other end is provided with a contact portion 431, and spring-pressing portions 432 are respectively provided on both sides of the contact portion 431. The button 600 is pressed, and the pressing column 620 acts on the spring-pressing portion 432, so that the contact portion 431 contacts or cuts off the second static terminal 420.

[0040] In this embodiment, in order to make the connection between the first static terminal 410, the second static terminal 420 and the movable plate 430 reasonable, the movable plate 400 is designed to be an inverted 'U' shape, one end of which is clamped in the clamping groove 140 to be fixedly contacted with the first static terminal 410, and the other end is provided with a contact portion 431, and the two sides of the contact portion 431 are respectively provided with a spring-pressing portion 432. When the button 600 is pressed down, the pressing column 620 in the groove 610 moves downward. When the pressing column 620 moves downward, it will squeeze the spring-pressing part 432, so that the contact part 431 moves toward the direction of the second static terminal 420 and makes contact, thereby realizing the conduction of the signal. When the button 600 is released, the button 600 is reset and raised by the spring 800, and the pressing column 620 follows the rise, thereby resetting the spring-pressing part 432, and the contact part 431 of the movable piece 430 is separated from the second static terminal 420, thereby realizing the cutting off of the signal.

[0041] See also Figure 1 and Figure 3Corresponding limiting grooves 150 are respectively provided on the lower outer wall of the base 100 and the outer wall of the shell 900. The light-emitting component 300 includes an LED lamp 310 and a translucent lampshade 320. The LED lamp 310 is electrically connected to the PCB board 500 in a surface mount manner. The translucent lampshade 320 is arranged in the limiting groove 150 and above the LED lamp 320 to transmit the light source emitted by the LED lamp 310.

[0042] In this embodiment, in order to make the key switch suitable for a variety of occasions, a light-emitting component 300 is further provided on one side after the base 100 and the housing 900 are covered and connected. The light-emitting component 300 includes an LED lamp 310 and a translucent lampshade 320. The translucent lampshade 320 is set in the limiting groove 150 for fixation, and the LED lamp 310 is electrically connected to the PCB board 500 by means of a patch. When the LED lamp 310 emits a light source, the light source is transmitted through the translucent lampshade 320 to the keycap 700 on the button 600, so that various symbols set on the keycap 700 are illuminated, so that the key switch can be used clearly even in the case of poor visibility, thereby enhancing the practicality of the key switch.

[0043] See also Figure 3 Four sliding grooves 160 are arranged on the inner wall of the sealing groove 120, and sliding blocks 630 corresponding to the four sliding grooves 160 are arranged on the outer wall of the button 600. When the button 600 is pressed, the four sliding grooves 160 and the corresponding sliding blocks 630 can enable the button 600 to slide up and down in a balanced manner when pressed.

[0044] In this embodiment, in order to improve the pressing feel of the button 600, a sliding block 630 is provided on the outer wall of the button 600, and a sliding groove 160 is provided on the inner wall of the sealing groove 120. The sliding block 630 is placed in the sliding groove 160. When the button 600 is pressed, the sliding block 630 can slide up and down in the sliding groove 160, so as to limit the pressing trajectory of the button 600. At the same time, four sliding grooves 160 and four sliding blocks 630 are provided to ensure the balance of the button 600 when pressed and prevent the button 600 from tilting when pressed. Ultimately, the pressing feel of the button 600 is improved.

[0045] See also Figure 3 and Figure 4 The outer wall of the base 100 is provided with a plurality of protrusions 170 , and the side wall of the shell 900 is provided with bayonet holes 910 corresponding to the plurality of protrusions 170 one by one. The shell 900 is connected to the base 100 by snapping the protrusions 170 into the bayonet holes 910 .

[0046] In this embodiment, the button 600 needs to move up and down on the base 100. In order to prevent the button 600 from being separated from the base 100, a protrusion is provided on the top of the shell 900, and a bayonet 910 is provided on the side wall of the shell 900. At the same time, a protrusion 170 is provided on the outer wall of the base 100. The shell 900 is inserted into the bayonet 910 through the protrusion 170 to be connected with the base 100, and the protrusion on the top of the shell 900 blocks the sliding block 630 on the outer wall of the button 600, so as to prevent the button 600 from being separated from the base 100 and make the connection between the button 600 and the base 100 reasonable.

[0047] Embodiment 2:

[0048] The sealed key switch in this embodiment is basically the same as that in the first embodiment, and the main difference is that the light emitting component 300 is a light emitting diode 330 .

[0049] For details, please refer to Figure 6 and Figure 7 A limiting hole 920 is provided on one side of the shell 900. After the base 100 and the shell 900 are covered and connected, the light emitting diode 330 is provided on one side of the base 100 through the limiting hole 920, and is plug-in electrically connected to the PCB board 500. Similarly, the light emitting diode 330 can emit a light source, and directly illuminate the keycap 700 on the button 600, so that various symbols set on the keycap 700 are illuminated, so that the key switch can be used clearly even in the case of poor visibility, so that the practicality of the key switch is enhanced.

[0050] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Any technician in this industry can smoothly implement the present invention as shown in the drawings of the specification and described above; however, any equivalent changes, modifications and evolutions made by any technician familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A sealed key switch, characterized in that: include: A base, wherein the base is arranged on the substrate, and an inwardly recessed mounting groove and a sealing groove are arranged at one end of the base, wherein the sealing groove is arranged on the outside of the mounting groove and is filled with sealing oil, a light-emitting component is also arranged on one side of the base, and a terminal component is arranged in the mounting groove, wherein the light-emitting component and the terminal component are electrically connected to the PCB board below the substrate respectively; A button, wherein a groove is provided at one end of the button and a key cap is provided at the other end, the side wall of the groove is inserted into the sealing groove, so that the groove and the mounting groove form an inner cavity, and the inner cavity forms a closed space through sealing oil, and a pressing column is provided in the groove; A spring, wherein the spring is arranged in the sealing groove, and two ends of the spring abut against the bottom of the groove and the bottom of the sealing groove respectively; A shell connected to the base and used to limit the end of the button inserted into the sealing groove; The terminal assembly includes a first static terminal, a second static terminal and a moving piece, one end of the first static terminal contacts one end of the moving piece, and the other end of the moving piece is connected or disconnected with one end of the second static terminal by pressing the pressing column, and the other ends of the first static terminal and the second static terminal extend from the mounting groove to the outside of the base and are electrically connected to the PCB board.

2. The sealed push button switch according to claim 1, characterized in that: A card slot is arranged at the bottom of the installation slot, the movable sheet is arranged in the card slot, the first static terminal and the second static terminal are arranged on both sides of the card slot respectively, and the first static terminal and the second static terminal are connected to the base by plastic coating.

3. The sealed key switch according to claim 2, characterized in that: The movable piece is in an inverted 'U' shape, one end of which is arranged in the card slot and contacts the first static terminal, and the other end is provided with a contact part, and spring parts are respectively provided on both sides of the contact part. When the button is pressed, the pressing column acts on the spring part to make the contact part contact or cut off the second static terminal.

4. The sealed key switch according to claim 3, characterized in that: Corresponding limiting grooves are respectively arranged on the lower outer wall of the base and the outer wall of the shell. The light-emitting component includes an LED lamp and a translucent lampshade. The LED lamp is electrically connected to the PCB board in a surface-mount manner. The translucent lampshade is arranged in the limiting groove and above the LED lamp to transmit the light source emitted by the LED lamp.

5. The sealed key switch according to claim 3, characterized in that: A limited position plug hole is arranged on one side of the shell, and the light emitting component is a light emitting diode. The light emitting diode is arranged on one side of the base through the limited position plug hole and is electrically connected to the PCB board in a plug-in manner.

6. The sealed key switch according to claim 4 or 5, characterized in that: Four sliding grooves are arranged on the inner wall of the sealing groove, and sliding blocks corresponding to the four sliding grooves are arranged on the outer wall of the button. When the button is pressed, the four sliding grooves and the corresponding sliding blocks can make the button slide up and down in a balanced manner.

7. The sealed key switch according to claim 6, characterized in that: A plurality of protrusions are arranged on the outer wall of the upper part of the base, and a plurality of bayonet holes corresponding to the plurality of protrusions are arranged on the side wall of the shell. The shell is connected and fixed to the base by the protrusions being snapped into the bayonet holes.

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