Micro switch with dustproof structure

Abstract

This utility model relates to a micro switch with a dustproof structure, comprising: a switch assembly, a push button, and a housing. The switch assembly is at least partially installed inside the housing. A first through hole is formed on the housing. One end of the push button passes through the first through hole and is disposed inside the housing, abutting against the switch assembly. The push button can move within the first through hole to control the opening or closing of the switch assembly. A sponge sealing ring is fitted onto the push button to seal the gap between the push button and the housing. In this utility model, the sponge sealing ring fitted onto the push button prevents dust and fiber contaminants from entering the housing. During the pressing and lifting of the push button, the sponge sealing ring can maintain a tight fit with the push button, achieving dustproof operation throughout the switching process. Furthermore, the sponge sealing ring has a simple structure, is easy to assemble, and its low cost reduces economic costs.

Description

Technical Field

[0001] This utility model relates to the field of electrical micro switch technology, specifically to a micro switch with a dustproof structure. Background Technology

[0002] A micro switch is a type of switch with a small contact gap and a quick-acting mechanism. It operates by using a specified stroke and force to perform the switching action. It is covered by a housing and has a drive rod on the outside. Because the contact gap of the switch is relatively small, it is called a micro switch, also known as a sensitive switch.

[0003] The existing micro switch has a push button as its driving lever. Since the push button is installed inside the housing and can move inside the housing, there is a gap between the push button and the through hole in the housing. Dust can easily enter between the exposed push button and the housing.

[0004] In the existing technology, dustproof silicone caps are added to the switch buttons to improve the dustproof effect of the switch. However, the dustproof caps need to be fixed by heat fusion or glue, which is a relatively complex process and costly. Summary of the Invention

[0005] The purpose of this invention is to provide a micro switch with a dustproof structure to solve the problem of high cost caused by the complex dustproof process in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A micro switch with a dustproof structure includes: a switch assembly, a push button, and a housing. The switch assembly is at least partially installed inside the housing. A first through hole is formed on the housing. One end of the push button passes through the first through hole and is disposed inside the housing, abutting against the switch assembly. The push button is movable within the first through hole to control the opening or closing of the switch assembly. A sponge sealing ring is fitted onto the push button and is used to seal the gap between the push button and the housing.

[0008] Based on the aforementioned technical means, the sponge sealing ring has a simple structure, is easy to assemble, and has a low cost, thus reducing economic costs. Simultaneously, by placing the sponge sealing ring on the button, it can prevent dust and fiber contaminants from entering the housing through the gap between the button and the housing. Furthermore, because the sponge sealing ring is easily deformable, pressing the button will not affect the normal operation of the switch. When the button rises, the sponge sealing ring simultaneously returns to its original position. During both pressing and rising of the button, the sponge sealing ring can maintain a tight fit with the button, achieving dust prevention throughout the entire switching process.

[0009] Furthermore, an adhesive layer is provided on the side of the sponge sealing ring near the housing, and the sponge sealing ring is fixed to the housing through the adhesive layer.

[0010] According to the above technical means, by providing an adhesive layer on the side of the sponge sealing ring near the housing, one side of the sponge sealing ring can be fixedly installed on the housing, preventing the sponge sealing ring from moving between the button and the housing during button movement, which would cause dust, fibers and other objects to enter the housing from the gap between the sponge sealing ring and the housing, affecting the normal use of the switch and increasing the sealing performance of the switch.

[0011] Furthermore, the switch assembly includes a first terminal assembly, a second terminal assembly, a third terminal assembly, and a conductive sheet; one end of the conductive sheet is electrically connected to the first terminal assembly, and the other end of the conductive sheet is oscillatingly disposed between the second terminal assembly and the third terminal assembly to electrically communicate with either the second terminal assembly or the third terminal assembly; the button is configured to drive the other end of the conductive sheet to oscillate between the second terminal assembly and the third terminal assembly.

[0012] According to the above technical means, the switch assembly includes a first terminal assembly, a second terminal assembly, a third terminal assembly, and a conductive sheet. One end of the conductive sheet is electrically connected to the first terminal assembly, and the other end of the conductive sheet is oscillatingly disposed between the second terminal assembly and the third terminal assembly. When the first terminal assembly and the second terminal assembly are connected, the switch assembly is turned on; when the first terminal assembly and the second terminal assembly are connected, the switch assembly is turned off.

[0013] Furthermore, the first terminal assembly includes a first terminal bracket and a second terminal bracket, which are electrically connected; one end of the conductive sheet is electrically connected to the second terminal bracket, and a first elastic element is connected between the conductive sheet and the first terminal bracket, the first elastic element having a tendency to bring the other end of the conductive sheet closer to the third terminal assembly; the button can abut against the conductive sheet.

[0014] According to the above technical means, the two ends of the conductive sheet are respectively installed on the first terminal bracket and the first elastic member, and the conductive sheet abuts against the button, so that during the pressing of the button, the other end of the conductive sheet can swing downward and connect with the second terminal assembly, and at this time the first elastic member deforms; when the button is pressed down and rises, the first elastic member rebounds and presses the other end of the conductive sheet to rise and connect with the third terminal assembly, so as to realize the opening and closing of the switch assembly.

[0015] Furthermore, the first elastic element is an elastic pressure plate.

[0016] Furthermore, the first terminal assembly includes a first terminal bracket and a second terminal bracket, which are electrically connected; one end of the conductive sheet is electrically connected to the first terminal bracket, and a second elastic member is connected between the conductive sheet and the second terminal bracket, the second elastic member having a tendency to bring the other end of the conductive sheet closer to the third terminal assembly; the button can abut against the second elastic member.

[0017] According to the above technical means, one end of the conductive sheet is oscillatingly mounted on the first terminal bracket, and the two ends of the second elastic member are respectively mounted on the second terminal bracket and the conductive sheet. The second elastic member can abut against the button. When the button is pressed down, it can press the other end of the second elastic member to swing downward, thereby causing the other end of the conductive sheet to swing and conduct to the second terminal assembly. When the button is pressed down and rises, the second elastic member rebounds and causes the other end of the conductive sheet to swing and conduct to the third terminal assembly, so as to realize the opening and closing of the switch assembly.

[0018] Furthermore, a limiting groove is formed on the first terminal bracket, and one end of the conductive sheet is engaged in the limiting groove.

[0019] According to the above technical means, a limiting groove is formed on the first terminal bracket, and the conductive sheet is installed in the limiting groove, so that the swing range of the conductive sheet is limited by the limiting groove, preventing the conductive sheet from swinging too much and damaging the components inside the housing.

[0020] Furthermore, the second elastic element is a tension spring.

[0021] Furthermore, a first conductive contact is formed on the conductive sheet, a second conductive contact is formed on the second terminal assembly, and a third conductive contact is formed on the third terminal assembly, with the two sides of the first conductive contact corresponding to the second conductive contact and the third conductive contact, respectively.

[0022] Based on the above technical means, the third conductive contact can be connected with the second or third conductive contact during the swinging process, thereby realizing the opening or closing of the switch assembly.

[0023] Furthermore, the diameter of the other end of the push button is larger than the aperture of the sponge sealing ring.

[0024] According to the above-mentioned technical means, the diameter of the other end of the button is larger than the pore diameter of the sponge sealing ring, so that the other end of the button can squeeze the sponge sealing ring to deform during the pressing process, thereby enabling the sponge sealing ring to fit tightly against the button during the pressing process, increasing the sealing performance between the button and the shell.

[0025] The beneficial effects of this utility model are:

[0026] In this invention, a sponge sealing ring is fitted onto the button. On the one hand, the sponge sealing ring has a simple structure, is easy to assemble, and has a low cost, which can reduce economic costs. On the other hand, it can prevent dust and fiber contaminants from entering the housing through the gap between the button and the housing. Furthermore, because the sponge sealing ring is easily deformable, pressing the button will not affect the normal operation of the switch. When the button rises, the sponge sealing ring simultaneously returns to its original position. During both pressing and rising of the button, the sponge sealing ring can fit tightly against the button to achieve dust prevention throughout the entire switching process. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1;

[0028] Figure 2 This is a schematic diagram of the hidden portion of the shell in this embodiment.

[0029] Figure 3 This is a schematic diagram of the overall structure of Embodiment 2;

[0030] Figure 4 This is a schematic diagram of the hidden portion of the shell in Embodiment 2;

[0031] Figure 5 This is an enlarged view of a portion of structure A in this embodiment two.

[0032] Wherein, 1-switch assembly, 11-first terminal assembly, 111-first terminal bracket, 1111-limiting groove, 112-second terminal bracket, 113-first elastic element, 114-second elastic element, 115-first conductive contact, 12-second terminal assembly, 121-second conductive contact, 13-third terminal assembly, 131-third conductive contact, 14-conductive sheet;

[0033] 2-Press;

[0034] 3-Shell, 31-Through hole;

[0035] 4-Sponge sealing ring. Detailed Implementation

[0036] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0037] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0038] Example 1

[0039] like Figure 1 As shown, this embodiment proposes a micro switch with a dustproof structure, including: a switch assembly 1, a push button 2, and a housing 3. The switch assembly 1 is at least partially installed inside the housing 3. A first through hole 31 is formed on the housing 3. One end of the push button 2 passes through the first through hole 31 and is inserted inside the housing 3, abutting against the switch assembly 1. The push button 2 can move within the first through hole 31 to control the opening or closing of the switch assembly 1. A sponge sealing ring 4 is sleeved on the push button 2 and is used to seal the gap between the push button 2 and the housing 3.

[0040] like Figure 1 As shown, the usage process of this embodiment is as follows: When the button 2 is pressed down, the sponge sealing ring 4 will be squeezed and deformed by the button 2 to seal the gap between the button 2 and the housing 3; when the button 2 rises, the sponge sealing ring 4 will rebound due to the lack of pressure. The sponge sealing ring 4 can fit with the button 2 during the movement of the button 2 to seal the gap between the button 2 and the housing 3, which can increase the sealing between the button 2 and the housing 3 during the movement of the button 2.

[0041] like Figure 1 As shown, in this embodiment, the sponge sealing ring 4 is fitted onto the button 2. On the one hand, it can prevent dust and fiber contaminants from entering the housing 3 through the gap between the button 2 and the housing 3. On the other hand, since the sponge sealing ring 4 is easily deformable, pressing the button 2 will not affect the normal operation of the switch. When the button 2 rises, the sponge sealing ring 4 returns to its original position. During the pressing and rising process of the button 2, the sponge sealing ring 4 can fit tightly with the button 2 to achieve dust prevention throughout the switching process. At the same time, compared with precision rubber rings, the sponge sealing ring 4 is easier to compress and adapt to irregular surfaces, reducing the dependence on high-precision molds and making it suitable for low-cost mass production. The sponge sealing ring 4 can absorb the mechanical impact when the button 2 is pressed down, reducing the rebound vibration of the switch.

[0042] like Figure 1As shown in the figure, in this embodiment, an adhesive layer (not shown) is provided on the side of the sponge sealing ring 4 near the housing 3. The sponge sealing ring 4 is fixed to the housing 3 by the adhesive layer. By providing an adhesive layer on the side of the sponge sealing ring 4 near the housing 3, one side of the sponge sealing ring 4 can be fixedly installed on the housing 3, preventing the sponge sealing ring 4 from moving between the button 2 and the housing 3 during the movement of the button 2. This would prevent dust and fibers from entering the interior of the housing 3 through the gap between the sponge sealing ring 4 and the housing 3, affecting the normal use of the switch and increasing the sealing performance of the switch.

[0043] like Figure 2 As shown, in this embodiment, the switch assembly 1 includes a first terminal assembly 11, a second terminal assembly 12, a third terminal assembly 13, and a conductive sheet 14. One end of the conductive sheet 14 is electrically connected to the first terminal assembly 11, and the other end of the conductive sheet 14 is oscillatingly disposed between the second terminal assembly 12 and the third terminal assembly 13 to electrically communicate with either the second terminal assembly 12 or the third terminal assembly 13. The button 2 is configured to drive the other end of the conductive sheet 14 to oscillate between the second terminal assembly 12 and the third terminal assembly 13. When the first terminal assembly 11 and the second terminal assembly 12 are connected, the switch assembly 1 is turned on; when the first terminal assembly 11 and the second terminal assembly 12 are connected, the switch assembly 1 is turned off.

[0044] like Figure 2 As shown, in this embodiment, the first terminal assembly 11 includes a first terminal bracket 111 and a second terminal bracket 112, which are electrically connected; one end of the conductive sheet 14 is electrically connected to the second terminal bracket 112, and a first elastic member 113 is connected between the conductive sheet 14 and the first terminal bracket 111, which has a tendency to bring the other end of the conductive sheet 14 closer to the third terminal assembly 13; the push button 2 can abut against the conductive sheet 14.

[0045] like Figure 2 As shown, in this embodiment, during use, since the button 2 abuts against the conductive sheet 14, when the button 2 is pressed down, it applies pressure to the conductive sheet 14, causing the other end of the conductive sheet 14 to swing downward and connect with the second terminal assembly 12, and the first elastic member 113 is squeezed and deformed; when the button 2 rises, since the button 2 no longer applies pressure to the conductive sheet 14, and since the other end of the first elastic member 113 is mounted on the conductive sheet 14, when the first elastic member 113 rebounds, it applies pressure to the conductive sheet 14, causing the other end of the conductive sheet 14 to swing upward and connect with the third terminal assembly 13.

[0046] like Figure 2 As shown, in this preferred embodiment, the first elastic element 113 is an elastic pressure plate.

[0047] like Figure 2 As shown, in this preferred embodiment, the first elastic member 113 has two limiting holes (holes in the figure). The first elastic member 113 is respectively sleeved on the first terminal bracket 111 and the second terminal bracket 112 through the limiting holes to prevent the first elastic member 113 from being displaced inside the housing 3.

[0048] like Figure 2 As shown, in this embodiment, a first conductive contact 115 is formed on the conductive sheet 14, a second conductive contact 121 is formed on the second terminal assembly 12, and a third conductive contact 131 is formed on the third terminal assembly 13. The two sides of the first conductive contact 115 correspond to the second conductive contact 121 and the third conductive contact 131, respectively. This allows the third conductive contact 131 to conduct with either the second conductive contact 121 or the third conductive contact 131 during its swing, thereby enabling the switch to be turned on or off.

[0049] like Figure 2 As shown, in this embodiment, the diameter of the other end of the press 2 is larger than the aperture of the sponge sealing ring 4.

[0050] According to the above technical means, the diameter of the other end of the button 2 is larger than the aperture of the sponge sealing ring 4, so that the other end of the button 2 can squeeze the sponge sealing ring 4 to deform during the pressing process, thereby enabling the sponge sealing ring 4 to fit tightly against the button 2 during the pressing process, increasing the sealing between the button 2 and the housing 3.

[0051] like Figure 2 As shown in the preferred embodiment, the housing 3 has two or more support blocks (protrusions in the figure), each support block is used to support the first terminal assembly 11 and the second terminal assembly 12, thereby increasing the stability of the first terminal assembly 11 and the second terminal assembly 12.

[0052] Example 2

[0053] This embodiment is similar to Embodiment 1, and the same parts are described in Embodiment 1. The following description only focuses on the improved parts.

[0054] like Figure 3 and Figure 4 As shown, in this embodiment, the first terminal assembly 11 includes a first terminal bracket 111 and a second terminal bracket 112, which are electrically connected. One end of the conductive sheet 14 is electrically connected to the first terminal bracket 111, and a second elastic member 114 is connected between the conductive sheet 14 and the second terminal bracket 112. The second elastic member 114 has a tendency to bring the other end of the conductive sheet 14 closer to the third terminal assembly 13. The push button 2 can abut against the second elastic member 114.

[0055] like Figure 3 and Figure 4 As shown, the usage process of this embodiment is as follows: Since the button 2 abuts against the second elastic member 114, when the button 2 is pressed down, it applies pressure to the second elastic member 114, causing the other end of the second elastic member 114 to swing downward. Since one end of the second elastic member 114 is mounted on the conductive sheet 14, and one end of the conductive sheet 14 is mounted on the first terminal bracket 111, the other end of the conductive sheet 14 swings downward and connects with the second terminal assembly 12. When the button 2 rises, since the button 2 no longer applies pressure to the second elastic member 114, and since both ends of the second elastic member 114 are respectively mounted on the first terminal bracket 111 and the conductive sheet 14, the second elastic member 114 rebounds and drives the other end of the first conductive sheet 14 to swing upward, so that the conductive sheet 14 connects with the third terminal assembly 13.

[0056] In this embodiment, the second elastic member 114 is always in a deformed state, that is, it always tends to bring the other end of the conductive sheet 14 closer to the third terminal assembly 13.

[0057] like Figure 4 As shown, in this preferred embodiment, a mounting hole (not shown in the figure) is formed on the second terminal bracket 112, and one end of the second elastic member 114 passes through the mounting hole and is connected to the conductive sheet 14. The mounting hole can be used to support the second elastic member 114 and prevent the position of the second elastic member 114 from changing inside the housing 3.

[0058] like Figure 4 and Figure 5 As shown, in this embodiment, a limiting groove 1111 is formed on the first terminal bracket 111, and one end of the conductive sheet 14 is engaged in the limiting groove 1111. This limits the swing range of the conductive sheet 14 by the limiting groove 1111, preventing the conductive sheet 14 from swinging too much and damaging the components inside the housing 3.

[0059] like Figure 4 As shown, in this preferred embodiment, the second elastic element 114 is a tension spring.

[0060] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.

Claims

1. A micro switch with a dustproof structure, characterized in that, include: The switch assembly (1), the push button (2), and the housing (3) are provided. The switch assembly (1) is at least partially installed inside the housing (3). A first through hole (31) is formed on the housing (3). One end of the push button (2) passes through the first through hole (31) and is inserted inside the housing (3), and can abut against the switch assembly (1). The push button (2) can move within the first through hole (31) to control the opening or closing of the switch assembly (1). A sponge sealing ring (4) is fitted onto the button (2) and is used to seal the gap between the button (2) and the housing (3).

2. A micro switch with a dustproof structure according to claim 1, characterized in that, An adhesive layer is provided on the side of the sponge sealing ring (4) near the housing (3), and the sponge sealing ring (4) is fixed to the housing (3) by the adhesive layer.

3. A micro switch with a dustproof structure according to claim 1, characterized in that, The switch assembly (1) includes a first terminal assembly (11), a second terminal assembly (12), a third terminal assembly (13), and a conductive sheet (14); one end of the conductive sheet (14) is electrically connected to the first terminal assembly (11), and the other end of the conductive sheet (14) is oscillatingly disposed between the second terminal assembly (12) and the third terminal assembly (13) to electrically communicate with either the second terminal assembly (12) or the third terminal assembly (13); the button (2) is configured to drive the other end of the conductive sheet (14) to oscillate between the second terminal assembly (12) and the third terminal assembly (13).

4. A micro switch with a dustproof structure according to claim 3, characterized in that, The first terminal assembly (11) includes a first terminal bracket (111) and a second terminal bracket (112), which are electrically connected; one end of the conductive sheet (14) is electrically connected to the second terminal bracket (112), and a first elastic member (113) is connected between the conductive sheet (14) and the first terminal bracket (111), the first elastic member (113) having a tendency to bring the other end of the conductive sheet (14) closer to the third terminal assembly (13); the push button (2) can abut against the conductive sheet (14).

5. A micro switch with a dustproof structure according to claim 4, characterized in that, The first elastic element (113) is an elastic pressure plate.

6. A micro switch with a dustproof structure according to claim 3, characterized in that, The first terminal assembly (11) includes a first terminal bracket (111) and a second terminal bracket (112), which are electrically connected; one end of the conductive sheet (14) is electrically connected to the first terminal bracket (111), and a second elastic member (115) is connected between the conductive sheet (14) and the second terminal bracket (112), the second elastic member (115) having a tendency to bring the other end of the conductive sheet (14) closer to the third terminal assembly (13); the push button (2) can abut against the second elastic member (115).

7. A micro switch with a dustproof structure according to claim 6, characterized in that, A limiting groove (1111) is formed on the first terminal bracket (111), and one end of the conductive sheet (14) is engaged in the limiting groove (1111).

8. A micro switch with a dustproof structure according to claim 6, characterized in that, The second elastic element (115) is a tension spring.

9. A micro switch with a dustproof structure according to claim 3, characterized in that, A first conductive contact (117) is formed on the conductive sheet (14), a second conductive contact (121) is formed on the second terminal assembly (12), and a third conductive contact (131) is formed on the third terminal assembly (13). The two sides of the first conductive contact (117) correspond to the second conductive contact (121) and the third conductive contact (131) respectively.

10. A micro switch with a dustproof structure according to claim 1, characterized in that, The diameter of the other end of the press (2) is larger than the aperture of the sponge sealing ring (4).

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