CN218513344U

CN218513344U - Key structure

Info

Publication number: CN218513344U
Application number: CN202220259053.5U
Authority: CN
Inventors: 张擎宇; 张李萍
Original assignee: Jiaxing Weineng Information Technology Co ltd
Current assignee: Jiaxing Weineng Information Technology Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2023-02-21
Anticipated expiration: 2032-01-25

Abstract

The utility model discloses a key structure, relating to the technical field of control equipment, wherein, the key cap is rotatably arranged on the bottom plate; the membrane switch, the PCB and the power generator are all arranged on the bottom plate, the membrane switch and the power generator are respectively connected with the PCB, and at least one switch contact is arranged on the membrane switch; the protective film is arranged between the keycap and the bottom plate, the protective film is provided with a first guide post arranged corresponding to the switch contact, the protective film is provided with a second guide post arranged corresponding to the power generation body, and the keycap is movably matched with the protective film; the limiting frame is arranged between the keycap and the protective film and is arranged on the bottom plate; the support is detachably mounted on the limiting frame, and the support is movably matched with the keycap. Inside can effectually preventing that dust, water or other debris from falling into the switch through the key cap, ensure membrane switch, PCB board and the normal use of the electricity generation body, can also play absorbing effect.

Description

Key structure

Technical Field

The utility model relates to a controlgear technical field, concretely relates to button structure.

Background

The scheme that key switch will realize that water-proof effects often adopts is outside waterproof, increases waterproof material layer promptly on the panel, but this kind of waterproof dustproof effect is not very good, and at the in-process of long-term use, moisture in the air can enter into key switch's inside, forms the oxidation in key switch's inside very easily, can cause key switch's button dumb, reduces key switch's life, and the result of use is not good.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The unsatisfactory technical problem of waterproof dustproof effect to waterproof material layer, the utility model provides a button structure, it can effectually prevent that dust, water or other debris from falling into the switch through the key cap inside, ensures membrane switch, PCB board and the normal use of the electricity generation body.

2. Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does: the utility model provides a button structure, includes key cap, support, spacing, protection film, membrane switch, PCB board, electricity generation body and bottom plate, wherein: the keycap is rotatably arranged on the bottom plate or the limiting frame; the membrane switch, the PCB and the power generator are all arranged on the bottom plate, the membrane switch and the power generator are respectively connected with the PCB, and the membrane switch is provided with at least one switch contact; the protective film is arranged between the keycap and the bottom plate, the protective film is provided with a first guide post arranged corresponding to the switch contact, the protective film is provided with a second guide post arranged corresponding to the power generation body, and the keycap is movably matched with the protective film; the limiting frame is arranged between the keycap and the protective film and is arranged on the bottom plate; the support is detachably mounted on the limiting frame, and the support is movably matched with the keycap.

Optionally, the bottom plate is provided with a screw hole for mounting on a wall, and the screw hole is located below the bracket.

Optionally, the power generation body is provided with a spring plate, and the support is matched with the spring plate through a protective film.

Optionally, the protection film is provided with a hollow boss group, the boss group includes a supporting table and a contact table arranged at an interval with the supporting table, the first guide pillar is located inside the contact table, the contact table has a closed end and an open end, one end of the first guide pillar is connected with the closed end, and the other end of the first guide pillar faces the open end and is movably matched with the membrane switch.

Optionally, an elastic piece is further installed on the bottom plate, one end of the elastic piece is installed on the bottom plate, and the other end of the elastic piece abuts against the elastic piece.

Optionally, the elastic element includes two spring bodies that are symmetrically arranged, a connecting element is connected between the two spring bodies, and the connecting element abuts against the elastic sheet.

Optionally, the support is rotatably connected to the keycap.

Optionally, the keycap has a first end and a second end, the first end and the second end are both provided with a hook, the hook is movably matched with the bottom plate or the limiting frame, and the first end and the second end are also respectively provided with a third guide pillar corresponding to the first guide pillar.

Optionally, the key cap has a first end and a second end, the first end is provided with a hook and a third guide pillar, the hook is movably matched with the bottom plate or the limiting frame, the third guide pillar is arranged corresponding to the first guide pillar, and the second end is provided with a positioning hook movably matched with the limiting frame.

Optionally, the support has the card protruding, the spacing is equipped with first limiting plate and second limiting plate, form between first limiting plate and the second limiting plate with card protruding complex draw-in groove.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) The embodiment of the application provides a button structure, the protection film sets up between key cap and bottom plate, can effectually prevent that dust, water or other debris from falling into the switch through the key cap inside, ensures the normal use of membrane switch, PCB board and generator, can also play absorbing effect, and spacing fixes the protection film on the bottom plate, prevents that the protection film from taking place the displacement, reinforcing protecting effect.

Drawings

Fig. 1 is an exploded view of a key structure according to an embodiment of the present invention.

Fig. 2 is a bottom view of the key structure according to the embodiment of the present invention.

Fig. 3 is a schematic view of a protection film of a key structure according to an embodiment of the present invention.

Fig. 4 is a schematic view of a limiting frame of a key structure according to an embodiment of the present invention.

Fig. 5 is a schematic view of an elastic member of a key structure according to an embodiment of the present invention.

The labels in the various figures are: 1. a keycap; 11. a first end; 12. a second end; 13. a hook is clamped; 14. a third guide post; 2. a support; 21. a protrusion; 22. reinforcing ribs; 23. clamping convex; 3. a limiting frame; 31. a first limit plate; 32. a second limiting plate; 33. a card slot; 4. a protective film; 41. a first guide post; 42. a second guide post; 43. a boss group; 431. a contact stage; 4311. a closed end; 4312. an open end; 432. a support table; 5. a base plate; 51. a screw hole; 6. a membrane switch; 61. a switch contact; 7. a PCB board; 8. a power generating body; 81. a spring plate; 9. an elastic member; 91. a spring body; 92. a connecting member.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The present application will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The utility model discloses in words such as first, second, be for the description the utility model discloses a technical scheme is convenient and set up, and does not have specific limiting action, is general finger, right the technical scheme of the utility model does not constitute limiting action. It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. A plurality of technical schemes in the same embodiment and a plurality of technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is all in the scope of the utility model.

Example 1

With reference to fig. 1-5, the key structure of the present embodiment is characterized by comprising a key cap 1, a support 2, a limiting frame 3, a protective film 4, a membrane switch 6, a PCB 7, a power generator 8, and a bottom plate 5, wherein: the keycap 1 is rotatably arranged on the bottom plate 5; the membrane switch 6, the PCB 7 and the power generator 8 are all arranged on the bottom plate 5, the membrane switch 6 and the power generator 8 are respectively connected with the PCB 7, and at least one switch contact 61 is arranged on the membrane switch 6; the protective film 4 is arranged between the keycap 1 and the bottom plate 5, the protective film 4 is provided with a first guide post 41 which is arranged corresponding to the switch contact 61, the protective film 4 is provided with a second guide post 42 which is arranged corresponding to the power generator 8, and the keycap 1 is movably matched with the protective film 4; the limiting frame 3 is arranged between the keycap 1 and the protective film 4, and the limiting frame 3 is arranged on the bottom plate 5; the support 2 is detachably mounted on the limiting frame 3, and the support 2 is movably matched with the keycap 1. When a user presses the keycap 1, the keycap 1 moves downwards, the keycap 1 is pressed on the protective film 4, the protective film 4 deforms and moves downwards, the first guide pillar 41 on the protective film 4 is pressed on the switch contact 61 of the membrane switch 6, the corresponding switch contact 61 is conducted, meanwhile, the keycap 1 also pushes the support 2 to move downwards, the salient point on the support 2 pushes the power generation body 8 to move through the second guide pillar 42 to generate power, the PCB 7 starts to work after being powered on, the corresponding switch point on the membrane switch 6 starts to be identified, a corresponding switch signal is sent to the receiver, and the receiver executes a corresponding function according to the received signal. Protection film 4 sets up between key cap 1 and bottom plate 5, can effectually prevent that dust, water or other debris from falling into the switch through key cap 1 inside, ensure membrane switch 6, PCB board 7 and the normal use of generator 8, can also play absorbing effect, and spacing 3 is fixed protection film 4 on bottom plate 5, prevents that protection film 4 from taking place the displacement, reinforcing protective effect. The power generator in this embodiment is an electromagnetic self-power generator, and the MCU on the PCB board 7 recognizes the operation of the membrane switch 6 and the key caps 1 at the instant when the electromagnetic self-power generator generates power, thereby realizing that a plurality of key caps 1 share one power generator. The electromagnetic type self-generating body is provided with a spring piece 81 serving as an elastic energy storage body, the spring piece 81 is matched with the key cap 1 through the support 2 to realize a basic connection structure of the magnetic pole mutation wireless input device, a feed pin of the electromagnetic type self-generating body is connected with the PCB 7 in a forward direction, a membrane switch is arranged below the key cap 1, and an outgoing line of the membrane switch is inserted into a socket of the PCB 7 in a plug mode and introduces a signal into the MCU. When a user presses the keycap 1, the keycap pushes the support to move downwards and pushes the electromagnetic type self-generating body to move to generate electricity, the electromagnetic type self-generating body feeds electricity to the PCB 7 through the output electrode, the MCU is powered to work, firstly, the conduction state on the membrane switch is read and translated into a key value, then, the key value is transmitted out through the RF transmitting circuit, and the receiving module commands the follow-up circuit to work according to the received key value.

Example 2

With reference to fig. 1-5, compared with the technical solution of embodiment 1, the key structure of this embodiment can be improved as follows: the bottom plate 5 is provided with screw holes 51 for mounting to a wall, the screw holes 51 being located below the bracket 2. When the switch needs to be installed or disassembled, the support 2 and the keycap 1 are disassembled, the protective film 4 does not need to be disassembled, the contact area between the support 2 and the keycap 1 is increased on the premise that the area of the bottom plate 5 is not increased, the flexibility of the keycap 1 during pressing is improved, the number of the keycaps 1 can be increased, and the practicability of the switch is increased.

Example 3

With reference to fig. 1-5, compared with the technical solutions of embodiment 1 or 2, the key structure of this embodiment can be improved as follows: the power generation body 8 is provided with an elastic sheet 81, and the support 2 is matched with the elastic sheet through a protective film 4. When a user presses the key cap 1, the key cap 1 moves downwards, the elastic sheet 81 is pushed to move downwards by the second guide pillar 42 on the support 2, the power generation body 8 moves to generate power, and the PCB 7 is electrified to start working. In a specific application, the bracket 2 may have a protrusion 21 corresponding to the second guide post 42, so that the second guide post 42 is more easily pushed by the protrusion 21, and the positioning is more accurate.

Example 4

With reference to fig. 1 to 5, compared with any technical solution in embodiments 1 to 3, the key structure in this embodiment may be improved as follows: the protective film 4 is provided with a hollow boss group 43, the boss group 43 comprises a support table 432 and a contact table 431 arranged at an interval with the support table 432, the first guide post 41 is located inside the contact table 431, the contact table 431 is provided with a closed end 4311 and an open end 4312, one end of the first guide post 41 is connected with the closed end 4311, and the other end of the first guide post 41 faces the open end 4312 and is movably matched with the membrane switch 6. Each keycap 1 corresponds to one boss group 43, when the keycap 1 presses the boss group 43, the support table 432 plays a supporting role, the first guide pillar 41 in the contact table 431 is in contact with the membrane switch 6, and the support table 432 increases the contact area between the boss group 43 and the keycap 1 to prevent the keycap 1 from being pressed empty. The protective film 4 is of an integrally formed structure. In other embodiments, the set of bosses 43 may include one support platform 432 and two contact platforms 431, or two support platforms 432 and one contact platform 431, or two contact platforms 431 and two support platforms 432. When a user presses the key cap 1, the key cap 1 moves downwards, the key cap 1 is pressed on the protective film 4, the closed end 4311 of the contact table 431 deforms and moves downwards, the first guide pillar 41 is pressed on the switch contact 61 of the membrane switch 6 through the open end 4312, the circuit board area is reduced due to the arrangement of the contact table 431 and the first guide pillar 41, the thickness of the membrane switch 6 is reduced, environmental protection is facilitated, and installation is facilitated. Protection film 4 formula structure as an organic whole in this embodiment, integrated into one piece is favorable to waterproof dustproof more. One end of the second guide post 42 can be connected to the closed end 4311, and the other end of the first guide post 41 faces the open end 4312 and is movably engaged with the membrane switch 6. The material of protection film 4 is silica gel, and silica gel has better corrosion resistance and better pliability, satisfies the material demand of protection film 4, and in other embodiments, the material of protection film 4 can be plastics or rubber.

Example 5

With reference to fig. 1 to 5, compared with any of the technical solutions of embodiments 1 to 4, the key structure of this embodiment can be improved as follows: the bottom plate 5 is further provided with an elastic piece 9, one end of the elastic piece 9 is arranged on the bottom plate 5, and the other end of the elastic piece 9 abuts against the elastic piece 81. The key cap 1 moves downwards, so that the salient points on the support 2 push the elastic sheet 81 to move downwards through the second guide post 42, the elastic piece 9 is stressed and compressed, and when the user releases the key cap 1, the elastic piece 9 rebounds by means of the elastic force of the elastic piece 9, and the power generation body 8 is pushed to reset.

Example 6

With reference to fig. 1 to 5, compared with any of the technical solutions of embodiments 1 to 5, the key structure of this embodiment can be improved as follows: the elastic part 9 comprises two spring bodies 91 which are symmetrically arranged, a connecting part 92 is connected between the two spring bodies 91, and the connecting part 92 abuts against the elastic sheet 81. The two spring bodies 91 enhance the elasticity of the elastic member 9 and push the generator 8 to return more quickly. The spring body 91 in this embodiment is a torsion spring.

Example 7

With reference to fig. 1 to 5, compared with any of the technical solutions of embodiments 1 to 6, the key structure of this embodiment can be improved as follows: the support 2 is rotatably connected with the keycap 1. The support 2 is provided with an arc-shaped reinforcing rib 22, and the keycap 1 is provided with a groove matched with the reinforcing rib 22. The strengthening rib 22 has increased support 2 self intensity, prolongs support 2's life, and the arc design has reduced the friction between key cap 1 and the support 2, increases the smoothness nature when key cap 1 rotates. In other embodiments, the key cap 1 is provided with a groove or protrusion structure engaged with the rib 22, and the corresponding rib 22 is provided with a protrusion or groove structure to achieve the effect of movably connecting the key cap 1 and the frame 2, and the rib 22 may be in an arc shape, a square shape, or a protrusion shape, a continuous shape, or an intermittent shape, which is not limited by the embodiments.

Example 8

With reference to fig. 1 to 5, compared with any of the technical solutions of embodiments 1 to 7, the key structure of this embodiment can be improved as follows: the key cap 1 is provided with a first end 11 and a second end 12, the first end 11 and the second end 12 are both provided with a hook 13, the hook 13 is movably matched with the bottom plate 5 or the limiting frame 3, and the first end 11 and the second end 12 are also respectively provided with a third guide post 14 correspondingly arranged with the first guide post 41. The first end 11 of the keycap 1 is pressed, the hook 13 on the first end 11 is matched with the limiting piece, the third guide pillar 14 on the first end 11 is contacted with the first guide pillar 41, the switch is started, the second end 12 of the keycap 1 is pressed, the hook 13 on the second end 12 is matched with the limiting piece, the third guide pillar 14 on the second end 12 is contacted with the first guide pillar 41, the switch is started, and the keycap 1 is opened in a bidirectional selection mode.

Example 9

With reference to fig. 1 to 5, compared with any of the technical solutions of embodiments 1 to 8, the key structure of this embodiment can be improved as follows: the key cap 1 is provided with a first end 11 and a second end 12, the first end 11 is provided with a clamping hook 13 and a third guide pillar 14, the clamping hook 13 is movably matched with the bottom plate 5 or the limiting frame 3, the third guide pillar 14 is correspondingly arranged with the first guide pillar 41, and the second end 12 is provided with a positioning hook movably matched with the limiting frame 3. The first end 11 of the keycap 1 is pressed, the hook 13 on the first end 11 is matched with the limiting piece, the third guide post 14 on the first end 11 is contacted with the first guide post 41, the switch is started, the second end 12 is pressed, the positioning hook on the second end 12 is matched with the limiting piece, the third guide post 14 on the first end 11 is separated from the first guide post 41, and the switch is closed.

Example 10

With reference to fig. 1 to 5, compared with any of the technical solutions of embodiments 1 to 9, the key structure of this embodiment can be improved as follows: the support 2 is provided with a clamping protrusion 23, the limiting frame 3 is provided with a first limiting plate 31 and a second limiting plate 32, and a clamping groove 33 matched with the clamping protrusion 23 is formed between the first limiting plate 31 and the second limiting plate 32. The cooperation of card protruding 23 and draw-in groove 33 makes support 2 demountable installation on spacing 3, when needs installation or when dismantling support 2, with the card protruding 23 take out from draw-in groove 33 can, convenient and fast.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art should understand that without departing from the spirit of the present invention, the person skilled in the art should not inventively design the similar structural modes and embodiments to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a key structure, its characterized in that, includes key cap, support, spacing, protection film, membrane switch, PCB board, electricity generation body and bottom plate, wherein:

the keycap is rotatably arranged on the bottom plate or the limiting frame;

the membrane switch, the PCB and the power generator are all arranged on the bottom plate, the membrane switch and the power generator are respectively connected with the PCB, and the membrane switch is provided with at least one switch contact;

the protective film is arranged between the keycap and the bottom plate, the protective film is provided with a first guide post arranged corresponding to the switch contact, the protective film is provided with a second guide post arranged corresponding to the power generation body, and the keycap is movably matched with the protective film;

the limiting frame is arranged between the keycap and the protective film and is arranged on the bottom plate;

the support is detachably mounted on the limiting frame, and the support is movably matched with the keycap.

2. The key structure according to claim 1, wherein said bottom plate is provided with screw holes for mounting to a wall, said screw holes being located below the bracket.

3. The key structure according to claim 1, wherein the power generating body has a spring piece, and the holder is fitted with the spring piece through a protective film.

4. The key structure according to claim 1, wherein the protection film has a hollow set of bosses, the set of bosses includes a supporting platform and a contact platform spaced from the supporting platform, the first guide pillar is located inside the contact platform, the contact platform has a closed end and an open end, one end of the first guide pillar is connected to the closed end, and the other end of the first guide pillar faces the open end and is movably engaged with the membrane switch.

5. The key structure according to claim 3, wherein the bottom plate is further provided with an elastic member, one end of the elastic member is mounted on the bottom plate, and the other end of the elastic member abuts against the elastic sheet.

6. The key structure of claim 5, wherein the elastic member comprises two symmetrically arranged spring bodies, and a connecting member is connected between the two spring bodies and abuts against the elastic sheet.

7. The key structure of claim 1, wherein the support is pivotally coupled to the key cap.

8. The key structure of claim 1, wherein the key cap has a first end and a second end, the first end and the second end are both provided with hooks, the hooks are movably engaged with the bottom plate or the limiting frame, and the first end and the second end are respectively provided with third guide posts corresponding to the first guide posts.

9. The key structure of claim 1, wherein the key cap has a first end and a second end, the first end is provided with a hook and a third guide post, the hook is movably engaged with the bottom plate or the limiting frame, the third guide post is disposed corresponding to the first guide post, and the second end is provided with a positioning hook movably engaged with the limiting frame.

10. The key structure according to claim 1, wherein the holder has a snap-fit protrusion, the retainer has a first retainer plate and a second retainer plate, and a snap groove is formed between the first retainer plate and the second retainer plate and fits with the snap-fit protrusion.