Membrane switch with pressure resistance

Abstract

The utility model relates to the related technical field of membrane switches, in particular to a membrane switch with pressure resistance, which comprises a panel layer, a circuit board, a pressing support piece and a pressing key, the panel layer is provided with a mounting hole, the pressing support piece can be inserted in the mounting hole, the pressing support piece comprises a plurality of semicircular support strips and a plurality of hook-shaped parts, and the pressing key is arranged on the panel layer. One ends of the plurality of supporting strips are mutually fixed, a plurality of limiting bulges fixed on the inner wall of the mounting hole are arranged at the opening of the mounting hole, a plurality of hook-shaped parts are fixed on the free end part of each supporting strip, one side of each hook-shaped part, which is provided with a bulge, can be propped against the corresponding limiting bulge, and the pressing key is fixed on one side of each supporting strip, which is deviated from the mounting hole. According to the utility model, the plurality of supporting strips are compressed, and the pressing supporting piece is inserted into the mounting hole, so that the hook-shaped part abuts against the limiting bulge, thereby achieving the purpose of conveniently replacing the pressing key, and solving the problem that the pressing key is difficult to replace after the surface of the traditional pressing key is abraded.

Description

Technical Field

[0001] The utility model relates to the technical field related to membrane switches, in particular to a membrane switch with pressure resistance. Background Art

[0002] The membrane switch is a new type of electronic switch used to control the on and off of the circuit in which it is located. However, when the switch is pressed for a long time, the elastic concave stroke of the metal spring inside is large. After people press it a lot, the metal spring is very likely to reduce its service life due to excessive elastic deformation.

[0003] Based on the above problems, the existing patent with publication number CN219418849U discloses a pressure-resistant membrane switch. By setting a pressing component, the membrane switch can be effectively prevented from being deformed after long-term use, thereby preventing the rebound force from being reduced and affecting its service life, thereby improving its durability.

[0004] However, when implementing the above-mentioned pressure-resistant membrane switch, it was found that there are at least the following problems: after long-term use, the surface of the push button of the membrane switch is often easily worn, while the push assembly does not show any abnormality. When this happens, the spring will lift the stop block, causing the stop block part to protrude from the worn part of the push button, affecting the contact between the upper electrical block and the panel layer when pressed, thereby causing poor contact of the membrane switch. Generally, it is difficult to replace the push button after the surface of the push button is worn, and usually the entire panel layer is replaced, resulting in a great waste. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies of the prior art, the utility model provides a pressure-resistant membrane switch, which can facilitate the replacement of push keys, so as to solve the problem in the prior art that it is difficult to replace push keys after the surface of the push keys is worn.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the utility model provides a pressure-resistant membrane switch, including a panel layer, a circuit board, a press support and a press key, the panel layer is provided with a mounting hole, the press support can be inserted into the mounting hole, the press support includes a plurality of semicircular arc-shaped support strips and a plurality of hook-shaped portions, one ends of the plurality of support strips are fixed to each other, a plurality of limiting protrusions fixed to the inner wall of the mounting hole are provided at the opening of the mounting hole, a plurality of hook-shaped portions are fixed to the free end of each of the support strips, the hook-shaped portion has a protruding side that can be against the limiting protrusion, and the press key is fixed to the side of the plurality of support strips away from the mounting hole.

[0009] Optionally, the plurality of support bars are made of elastic metal material.

[0010] Optionally, the mounting hole also includes a pressing rod, one end of which is fixed to one end of a plurality of support bars fixed to each other, the pressing rod faces the circuit board, a connecting block is fixed on the pressing rod, a plurality of connecting rods are rotatably connected to the periphery of the connecting block, a sliding block is fixed to the free end of the connecting rod, and a plurality of sliding grooves for the sliding block to slide are provided at the bottom of the mounting hole.

[0011] Optionally, a spring is provided on one side of each sliding block close to the inner wall of the mounting hole, and two ends of the spring are distributed to abut against the mounting hole and the sliding block.

[0012] Optionally, it also includes a limit frame which is covered on the outside of the connecting block and fixed to the circuit layer, the pressing rod can be movably inserted into the limit frame, and a plurality of limit grooves for the connecting rod to slide are opened on the periphery of the limit frame.

[0013] Optionally, the distance between the top of the limiting frame and one side where the plurality of support bars are fixed to each other is greater than the distance between the pressing rod and the circuit board.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a membrane switch with pressure resistance, which has the following beneficial effects:

[0016] 1. The utility model provides a pressing support member. When the pressing key is worn during long-term use, the user presses the multiple support strips, inserts the pressing support member into the mounting hole, and the hook-shaped parts at the free ends of the multiple support strips abut against the limiting protrusions, so as to facilitate the replacement of the pressing key. In the disassembly process, the multiple support strips can be squeezed inwards for quick disassembly, which solves the problem that it is difficult to replace the pressing key after the surface of the traditional pressing key is worn.

[0017] 2. The utility model sets a spring so that the spring and the sliding block are against each other, driving the connecting rod to push the pressing rod upward, accelerating the rebound of the pressing rod, and increasing a certain degree of pressure resistance, so that the pressing key still has a relatively good pressing performance after multiple pressings;

[0018] 3. The utility model sets a limit frame to limit the movement of the connecting block when the spring and the sliding block are against each other, driving the connecting rod to push the pressing rod upward and accelerating the rebound of the pressing rod, thereby reducing the influence of the spring, causing the pressing rod to continuously against the pressing key, resulting in a bulge on the top of the pressing key, or the support bar being against the pressing rod for a long time, resulting in a reduction in the elasticity of the support bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 A schematic diagram of a partial explosion structure is shown;

[0021] Figure 3 A schematic diagram of the internal structure of the mounting hole is shown;

[0022] Figure 4 A partial structural schematic diagram is shown.

[0023] In the figure: 1. panel layer; 2. circuit board; 3. pressing support; 31. support bar; 32. hook-shaped portion; 4. pressing key; 5. mounting hole; 6. limiting protrusion; 7. pressing rod; 8. connecting block; 9. connecting rod; 10. sliding block; 11. sliding groove; 12. spring; 13. limiting frame; 14. limiting groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example: See Figures 1 to 4 According to an embodiment of the utility model, a technical solution is provided: a pressure-resistant membrane switch, comprising a panel layer 1, a circuit board 2, a pressing support 3 and a pressing key 4, a mounting hole 5 is opened on the panel layer 1, the pressing support 3 can be inserted into the mounting hole 5, the pressing support 3 comprises a plurality of semicircular arc-shaped support bars 31 and a plurality of hook-shaped portions 32, one end of the plurality of support bars 31 is fixed to each other, a plurality of limiting protrusions 6 fixed to the inner wall of the mounting hole 5 are provided at the opening of the mounting hole 5, a plurality of hook-shaped portions 32 are fixed to the free end of each support bar 31, a protruding side of the hook-shaped portion 32 can be against the limiting protrusion 6, and the pressing key 4 is fixed to the side of the plurality of support bars 31 away from the mounting hole 5.

[0026] A pressure-resistant membrane switch adopts the above structure. By setting a pressing support member 3, when the pressing key 4 is worn during long-term use, the user presses the multiple support strips 31, inserts the pressing support member 3 into the mounting hole 5, and abuts the limiting protrusion 6 through the hook-shaped portion 32 located at the free end of the multiple support strips 31, thereby facilitating the replacement of the pressing key 4. During the disassembly process, the multiple support strips 31 can be squeezed inwards for rapid disassembly, thereby solving the problem that it is difficult to replace the pressing key 4 after the surface of the traditional pressing key 4 is worn.

[0027] In this embodiment, the plurality of support bars 31 are made of elastic metal material. By setting the support bars 31 to be made of elastic metal material, the support of the support bars 31 to the push keys 4 can be increased.

[0028] In this embodiment, the mounting hole 5 also includes a pressing rod 7, one end of the pressing rod 7 is fixed to one end of a plurality of supporting members, the pressing rod 7 faces the circuit board 2, a connecting block 8 is fixedly provided on the pressing rod 7, a plurality of connecting rods 9 are rotatably connected to the periphery of the connecting block 8, a sliding block 10 is fixed to the free end of the connecting rod 9, and a plurality of sliding grooves 11 for the sliding block 10 to slide are provided at the bottom of the mounting hole 5. By arranging the pressing rod 7, the connecting block 8, the connecting rod 9 and the sliding block 10, the stability of the pressing rod 7 can be maintained when the pressing key 4 is used to drive the pressing rod 7 to be pressed down, thereby reducing the problem of poor contact between the pressing rod 7 and the circuit board 2 or direct inability to contact the circuit board 2 due to the user pressing the pressing key 4 obliquely.

[0029] In this embodiment, a spring 12 is provided on one side of each sliding block 10 close to the inner wall of the mounting hole 5, and the two ends of the spring 12 are distributed to resist the mounting hole 5 and the sliding block 10. By setting the spring 12, the spring 12 and the sliding block 10 are resisted, driving the connecting rod 9 to push the pressing rod 7 to move upward, accelerating the rebound of the pressing rod 7, and increasing a certain degree of pressure resistance, so that the pressing key 4 still has a relatively good pressing property after multiple pressings.

[0030] In this embodiment, it also includes a limit frame 13 which is covered on the outside of the connecting block 8 and fixed to the circuit layer. The pressing rod 7 can be movably inserted in the limit frame 13. A plurality of limit grooves 14 for the connecting rod 9 to slide are opened on the periphery of the limit frame 13. By setting the limit frame 13, when the spring 12 and the sliding block 10 are abutted, the connecting rod 9 is driven to push the pressing rod 7 to move upward, and the rebound of the pressing rod 7 is accelerated to limit the movement of the connecting block 8, thereby reducing the influence of the spring 12, the pressing rod 7 continues to abut against the pressing key 4, resulting in a bulge on the top of the pressing key 4 or the support bar 31 is abutted by the pressing rod 7 for a long time, resulting in a reduction in the elasticity of the support bar 31.

[0031] In this embodiment, the spacing between one side where the multiple support members at the top of the limit frame 13 are fixed to each other is greater than the spacing between the pressing rod 7 and the circuit board 2. By setting the spacing between one side where the multiple support strips 31 at the top of the limit frame 13 are fixed to each other to be greater than the spacing between the pressing rod 7 and the circuit board 2, the connecting block 8 is limited while the normal pressing rod 7 can touch the circuit board 2. If the spacing between one side where the multiple support strips 31 at the top of the limit frame 13 are fixed to each other is smaller than the spacing between the pressing rod 7 and the circuit board 2, the pressing rod 7 may not touch the circuit board 2 or the support strip 31 may abut against the limit frame 13 multiple times after multiple pressings, causing damage to the support strip 31.

[0032] Working principle: When the push button 4 is worn out during long-term use, the user presses the multiple support strips 31, inserts the push support member 3 into the mounting hole 5, and abuts the limit protrusion 6 through the hook-shaped portion 32 located at the free end of the multiple support strips 31, thereby facilitating the replacement of the push button 4, and during the disassembly process, the multiple support strips 31 can be squeezed inward for quick disassembly. During the pressing process, the user presses down to press the push button 4, causing the multiple support strips 31 supporting the push button 4 to bend, and at the same time, the push rod 7 is pressed down to abut against the circuit board 2, thereby controlling the operation panel. During the rebound of the push button 4, the spring 12 drives the sliding block 10 to slide in the sliding groove 11. During the sliding of the sliding block 10, the inverted connecting rod 9 moves the connecting block 8 fixed on the push rod 7, so that the push rod 7 lifts the push button 4.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A membrane switch with pressure resistance, comprising a panel layer (1) and a circuit board (2), characterized in that: include: A pressing support member (3) and a pressing key (4), wherein a mounting hole (5) is provided on the panel layer (1), wherein the pressing support member (3) can be inserted into the mounting hole (5), wherein the pressing support member (3) comprises a plurality of semicircular arc-shaped supporting strips (31) and a plurality of hook-shaped portions (32), wherein one end of the plurality of supporting strips (31) are fixed to each other, wherein a plurality of limiting protrusions (6) fixed to the inner wall of the mounting hole (5) are provided at the opening of the mounting hole (5), wherein a plurality of hook-shaped portions (32) are fixed to the free end of each of the supporting strips (31), wherein a protruding side of the hook-shaped portion (32) can be abutted against the limiting protrusion (6), and the pressing key (4) is fixed to a side of the plurality of supporting strips (31) away from the mounting hole (5).

2. The pressure-resistant membrane switch according to claim 1, characterized in that: The plurality of support bars (31) are made of elastic metal material.

3. The pressure-resistant membrane switch according to claim 1, characterized in that: The mounting hole (5) also includes a pressing rod (7), one end of which is fixed to one end of the plurality of support bars (31), the pressing rod (7) faces the circuit board (2), a connecting block (8) is fixedly provided on the pressing rod (7), the peripheral edge of the connecting block (8) is rotatably connected to a plurality of connecting rods (9), a sliding block (10) is fixed to the free end of the connecting rod (9), and a plurality of sliding grooves (11) for the sliding blocks (10) to slide are provided at the bottom of the mounting hole (5).

4. The pressure-resistant membrane switch according to claim 3, characterized in that: A spring (12) is provided on one side of each sliding block (10) close to the inner wall of the mounting hole (5), and two ends of the spring (12) are distributed to abut against the mounting hole (5) and the sliding block (10).

5. The pressure-resistant membrane switch according to claim 4, characterized in that: It also includes a limit frame (13) which is covered on the outside of the connecting block (8) and fixed to the circuit layer, the pressing rod (7) can be movably inserted into the limit frame (13), and the limit frame (13) is provided with a plurality of limit grooves (14) around the periphery for the connecting rod (9) to slide.

6. The pressure-resistant membrane switch according to claim 5, characterized in that: The spacing between the sides of the top of the limiting frame (13) where the plurality of support bars (31) are fixed to each other is greater than the spacing between the pressing rod (7) and the circuit board (2).

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