Independent metal dome positioning device

Abstract

The utility model relates to the technical field of remote control, in particular to an independent metal dome positioning device, which comprises a circuit board and a plurality of metal domes on the circuit board. A plurality of connecting discs mutually connected through a non-deformable lower vertical plate and a plurality of positioning rings mutually connected through a non-deformable vertical plate are matched with a light button to clamp and fix a circuit board below the metal dome, and the metal dome is limited up, down, front, back, left and right; the supporting plate and the pressing plate cannot be deformed, meanwhile, the circuit board including the PCB, the FPC board and the rigid-flex board can be effectively prevented from deforming, the metal dome can be positioned more stably and comprehensively, the contact area between the lower vertical plate, the disc, the vertical plate and the positioning ring and the circuit board is smaller, and heat dissipation is better facilitated.

Description

Technical Field

[0001] This utility model relates to the field of remote control technology, and in particular to an independent hot plate positioning device. Background Technology

[0002] Dome switches, also known as metal springs or dome switches, are mainly used in membrane switches, contact switches, PCBs, FPCs, medical devices, and other products. They are widely used in various end products such as remote controls, cameras, mobile phones, and medical devices. An existing patent application (CN201310486186.1) describes an independent dome switch positioning device… which features a simple and reasonable design, long service life, good heat dissipation, strong positioning effect, and resistance to dome switch misalignment, making it suitable for industrial production. However, the plates are connected by elastic connectors, so the plate in the middle position may detach upwards from the PCB. Furthermore, for flexible FPCs, the FPC can easily bend downwards and detach from the plate, allowing the dome switch to shift through the gap between the plate and the FPC or PCB, resulting in unstable positioning. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies where the connection between plates via elastic connectors allows the plates to detach upwards from the PCB or bend downwards from the flexible FPC, resulting in unstable positioning. Therefore, this invention proposes an independent dome positioning device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Design an independent dome switch positioning device, including a circuit board and several dome switches thereon. The upper and lower end faces of the circuit board are respectively provided with a pressure plate and a support plate, and the support plate and pressure plate are respectively composed of a vertical plate and a positioning ring, a lower vertical plate and a disc. Several positioning rings are provided on the upper part of the circuit board. The dome switches are respectively fitted with positioning rings. A soft PVC sheet is glued to the top of the positioning rings. Four vertical plates arranged longitudinally and transversely above the soft PVC sheet are fixed at equal intervals on the outer walls of the positioning rings. The two vertical plates between two adjacent positioning rings are integrally formed. Several discs are provided on the back of the circuit board, and the discs are respectively located below the dome switches. Four lower vertical plates arranged longitudinally and transversely are fixed at equal intervals on the outer walls of the discs. The two vertical plates between two adjacent lower vertical plates are integrally formed. The vertical plates and lower vertical plates located at the left and right ends are fixedly connected by a connecting structure.

[0006] Preferably, a lightweight button is inserted inside the positioning ring, and the upper and lower ends of the lightweight button abut against a soft PVC sheet and a dome switch, respectively.

[0007] Preferably, the plurality of upright plates and the plurality of positioning rings are integrally formed by injection molding of rigid plastic, and the plurality of lower upright plates and the plurality of discs are integrally formed by injection molding of rigid plastic.

[0008] Preferably, the connection structure includes two connecting plates located on the left and right sides of the circuit board. The sides of the connecting plates are provided with a set of mounting holes and a set of insertion holes located on the upper and lower sides of the circuit board, respectively. The outermost ends of the plurality of upright plates located on both sides are inserted into the mounting holes through a snap-fit ​​structure, and the outermost ends of the plurality of lower upright plates located on both sides are inserted into the insertion holes.

[0009] Preferably, the snap-fit ​​structure includes a snap-fit ​​groove and a snap-fit ​​block. The upper and lower end faces of the outermost ends of the two upright plates are integrally formed with snap-fit ​​blocks. The left and right sides of the snap-fit ​​blocks are chamfered to facilitate the insertion and removal of the connecting plate. The upper and lower inner walls of the connecting plate's mounting holes are provided with snap-fit ​​grooves that cooperate with the snap-fit ​​blocks, and the snap-fit ​​blocks are snapped into the snap-fit ​​grooves.

[0010] Preferably, the mounting holes of the connecting plate are integrally formed with bosses on the front and rear walls, and the four sides of the bosses are bevels. The outermost side of the two vertical plates is provided with a snap-fit ​​hole in the mounting hole of the connecting plate, and the two ends of the snap-fit ​​hole are respectively snapped with bosses.

[0011] Preferably, the circuit board includes an inflexible PCB board, a flexible FPC board, and a rigid-flex board combining the PCB board and the FPC board.

[0012] The present invention proposes an independent dome switch positioning device, which has the following advantages: A series of connecting discs connected by an indeformable lower plate and a series of positioning rings connected by indeformable upper plates, along with a lightweight button, clamp and fix the circuit board below the dome switch, and limit the dome switch's vertical, horizontal, and back-and-forth movement. The indeformable support plate and pressure plate effectively prevent deformation of the circuit board, including PCBs, FPCs, and rigid-flex boards. This results in more stable and comprehensive positioning of the dome switch. Furthermore, the smaller contact area between the lower plate, discs, upper plates, positioning rings, and circuit board facilitates heat dissipation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an independent hot plate positioning device proposed in this utility model;

[0014] Figure 2 This is a schematic diagram of the bottom structure of an independent hot plate positioning device proposed in this utility model;

[0015] Figure 3 This is a partial structural diagram of an independent hot plate positioning device proposed in this utility model;

[0016] Figure 4 This is a schematic diagram of the connection structure of an independent hot plate positioning device proposed in this utility model;

[0017] Figure 5 This is a schematic diagram of the snap-fit ​​hole structure of an independent hot plate positioning device proposed in this utility model.

[0018] In the diagram: 1. Circuit board; 2. Positioning ring; 3. Soft PVC sheet; 4. Vertical plate; 5. Lower vertical plate; 6. Connecting plate; 7. Disc; 8. Lightweight button; 9. Dome switch; 10. Boss; 11. Locking block; 12. Locking hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-5 An independent dome switch positioning device includes a circuit board 1 and several dome switches 9 thereon. The upper and lower end faces of the circuit board 1 are respectively provided with a support plate and a pressure plate, and the pressure plate and the support plate are respectively composed of a vertical plate 4, a positioning ring 2, a lower vertical plate 5, and a disc 7. Several positioning rings 2 are provided on the upper part of the circuit board 1. Several positioning rings 2 are respectively fitted on the outside of several dome switches 9. A soft PVC sheet 3 is glued to the top of several positioning rings 2. Four vertical plates 4 arranged vertically and horizontally higher than the soft PVC sheet 3 are fixed at equal intervals on the outer wall of several positioning rings 2. The two vertical plates 4 between two adjacent positioning rings 2 are integrally formed. Several discs 7 are provided on the back of the circuit board 1. Several discs 7 are respectively arranged below several dome switches 9. Four lower vertical plates 5 arranged vertically and horizontally are fixed at equal intervals on the outer wall of several discs 7. The two vertical plates 4 between two adjacent lower vertical plates 5 are integrally formed. Several vertical plates 4 and several lower vertical plates 5 located at the left and right ends are fixedly connected by a connecting structure.

[0021] Reference Figure 1-5 To further prevent the dome switch 9 from contacting the soft PVC sheet 3 and thus entering the gap between the soft PVC sheet 3 and the positioning ring 2, a lightweight button 8 is inserted inside the positioning ring 2, and the upper and lower ends of the lightweight button 8 abut against the soft PVC sheet 3 and the dome switch 9, respectively.

[0022] Reference Figure 1-5 To increase the strength of the pressure plate and pallet and reduce the difficulty of production, several vertical plates 4 and several positioning rings 2 are integrally injection molded from rigid plastic, and several lower vertical plates 5 and several discs 7 are integrally injection molded from rigid plastic.

[0023] Reference Figure 1-5In order to connect and fix the vertical plate 4 and the lower vertical plate 5, the connection structure includes two connecting plates 6 located on the left and right sides of the circuit board 1. The side of the connecting plate 6 is provided with a set of mounting holes and a set of insertion holes located on the upper and lower sides of the circuit board 1, respectively. The outermost ends of several vertical plates 4 located on both sides are inserted into the mounting holes through a snap-fit ​​structure, and the outermost ends of several lower vertical plates 5 located on both sides are inserted into the insertion holes.

[0024] Reference Figure 1-5 To prevent the connecting plate 6 from detaching from the upright plate 4, the snap-fit ​​structure includes a slot and a snap-fit ​​block 11. The upper and lower end faces of the outermost ends of the two upright plates 4 are integrally formed with snap-fit ​​blocks 11, and the left and right sides of the snap-fit ​​block 11 are chamfered to facilitate the insertion and removal of the mounting holes of the connecting plate 6. The upper and lower inner walls of the mounting holes of the connecting plate 6 are provided with slots that cooperate with the snap-fit ​​block 11, and the snap-fit ​​block 11 is snapped into the slots.

[0025] Reference Figure 1-5 To further strengthen the connection between the connecting plate 6 and the upright plate 4, the front and rear walls of the mounting holes of the connecting plate 6 are integrally formed with bosses 10, and the four sides of the bosses 10 are inclined. The outermost side of the upright plates 4 on both sides is provided with snap-fit ​​holes 12 located in the mounting holes of the connecting plate 6, and the bosses 10 are snapped into the interior of both ends of the snap-fit ​​holes 12 respectively.

[0026] Reference Figure 1-5 To broaden its applicability, circuit board 1 includes an inflexible PCB board, a flexible FPC board, and a rigid-flex board combining the PCB board and the FPC board.

[0027] Working principle: By placing the circuit board 1 with the dome switch 9 installed on the tray and covering it with the pressure plate, each dome switch 9 is located inside the positioning ring 2 and on top of the disc 7. The circuit board 1 below the dome switch 9 is clamped and fixed by the positioning ring 2 and the disc 7. The positioning ring 2 limits the left, right and forward and backward movement of the dome switch 9, and the lightweight button 8 limits the up and down movement of the dome switch 9 on the disc 7. By inserting the lower upright plate 5 and the upright plate 4 on both sides into the socket and the safety control of the connecting plate 6, the pressure plate and the tray are fixedly connected, thereby fixing the disc 7, the positioning ring 2 and the lightweight button 8 inside it. The disc 7, the positioning ring 2 and the lightweight button 8 fix the circuit board 1 and the dome switch 9. When in use, press the soft PVC sheet 3 to make it concave downward in the middle, thereby pressing down the lightweight button 8, so that the lightweight button 8 presses the dome switch 9.

[0028] The circuit board 1 below the dome switch 9 is clamped and fixed by a number of connecting discs 7 interconnected by an undeformable lower plate 5 and a number of positioning rings 2 interconnected by an undeformable upper plate 4, together with a lightweight button 8. The dome switch 9 is limited in the up, down, forward, backward and left and right directions. The support plate and pressure plate are undeformable and can effectively prevent the circuit board 1, including the PCB board, FPC board and rigid-flex board, from deforming. The positioning of the dome switch 9 is more stable and comprehensive. Moreover, the contact area between the lower plate 5, discs 7, upper plate 4, positioning rings 2 and circuit board 1 is smaller, which is more conducive to heat dissipation.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An independent dome switch positioning device, comprising a circuit board (1) and a plurality of dome switches (9) thereon, characterized in that, The circuit board (1) has a pressure plate and a support plate on its upper and lower ends, respectively. The support plate and the pressure plate are composed of a vertical plate (4) and a positioning ring (2), a lower vertical plate (5) and a disc (7), respectively. The circuit board (1) has several positioning rings (2) on its upper part. Several positioning rings (2) are fitted on the outside of several dome switches (9). Soft PVC sheets (3) are glued to the top of several positioning rings (2). Four vertical plates (4) arranged vertically and horizontally higher than the soft PVC sheets (3) are fixed at equal intervals on the outer walls of several positioning rings (2). The two vertical plates (4) between two adjacent positioning rings (2) are integrally formed. The back of the circuit board (1) is provided with several discs (7), and the several discs (7) are respectively arranged below several dome plates (9). The outer walls of the several discs (7) are all fixed with four vertically and horizontally arranged lower vertical plates (5) at equal intervals. The two vertical plates (4) between two adjacent lower vertical plates (5) are integrally formed. The several vertical plates (4) and several lower vertical plates (5) located at the left and right ends are fixedly connected by a connecting structure.

2. The independent hot plate positioning device according to claim 1, characterized in that, A lightweight button (8) is inserted inside the positioning ring (2), and the upper and lower ends of the lightweight button (8) abut against the soft PVC sheet (3) and the dome switch (9) respectively.

3. The independent positioning device for hot plate dome according to claim 1, characterized in that, The aforementioned upright plates (4) and the aforementioned positioning rings (2) are integrally formed by injection molding of rigid plastic, and the aforementioned lower upright plates (5) and the aforementioned discs (7) are integrally formed by injection molding of rigid plastic.

4. The independent hot plate positioning device according to claim 1, characterized in that, The connection structure includes two connecting plates (6) located on the left and right sides of the circuit board (1). The side of the connecting plate (6) is provided with a set of mounting holes and a set of insertion holes located on the upper and lower sides of the circuit board (1). The outermost ends of several vertical plates (4) located on both sides are inserted into the mounting holes through a snap-fit ​​structure. The outermost ends of several lower vertical plates (5) located on both sides are inserted into the insertion holes.

5. The independent hot plate positioning device according to claim 4, characterized in that, The snap-fit ​​structure includes a slot and a snap-fit ​​block (11). The upper and lower end faces of the outermost ends of the two upright plates (4) are integrally formed with snap-fit ​​blocks (11). The left and right sides of the snap-fit ​​block (11) are chamfered to facilitate the insertion and removal of the mounting holes of the connecting plate (6). The upper and lower inner walls of the mounting holes of the connecting plate (6) are provided with slots that cooperate with the snap-fit ​​block (11), and the snap-fit ​​block (11) is snapped into the slot.

6. The independent hot plate positioning device according to claim 4, characterized in that, The mounting holes of the connecting plate (6) are integrally formed with bosses (10) on the front and rear walls, and the four sides of the bosses (10) are inclined. The outermost side of the upright plates (4) on both sides is provided with snap-fit ​​holes (12) located in the mounting holes of the connecting plate (6), and the bosses (10) are snapped into the interior of both ends of the snap-fit ​​holes (12).

7. The independent positioning device for hot plate dome according to claim 1, characterized in that, The circuit board (1) includes an inflexible PCB board, a flexible FPC board, and a rigid-flex board combining the PCB board and the FPC board.

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