Microswitch with waterproof structure

Abstract

The utility model relates to a microswitch with a waterproof structure, which comprises a base, a conductive assembly, a button, a button shield, an elastic sealing element and a trigger assembly, the elastic sealing piece is provided with an outer periphery sealing ring located between the button shield and the upper cover, an inner periphery sealing ring arranged on the periphery of the button in a sleeving mode and matched with the button in a sealing mode, and an elastic telescopic structure connected between the outer periphery sealing ring and the inner periphery sealing ring. The elastic telescopic structure comprises a U-shaped ring. Due to the arrangement of the elastic telescopic structure, the inner peripheral sealing ring can freely and axially move along with the button and cannot form pulling force on the outer peripheral sealing ring, so that stable sealing is kept among the button shield, the outer peripheral sealing ring and the upper cover, and stable sealing is kept between the button and the inner peripheral sealing ring at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to a microswitch with waterproof structure. BACKGROUND

[0002] In electronic equipment and electrical control systems, microswitches, as a common control element, play an important role. However, in many application scenarios, microswitches often face the challenge of a humid, water-containing, or even water-soaked environment. Traditional microswitches have obvious deficiencies in waterproof performance. For example, the microswitch structure design disclosed in patent CN202123235570.3 is relatively simple, and the sealing and waterproof effect is insufficient, which can easily lead to the intrusion of moisture into the interior, causing problems such as short circuit and corrosion of the switch contacts, thereby affecting the normal operation of the switch and reducing its service life and reliability. SUMMARY

[0003] The utility model aims at overcoming the shortcomings and deficiencies of the prior art and provides a microswitch with waterproof structure.

[0004] The technical scheme adopted by the utility model is as follows: a microswitch with waterproof structure, comprising a base, a conductive assembly, a button, a button shield, an elastic sealing element, and a trigger assembly, the base and an upper cover are connected to form a cavity, the conductive assembly, the button, the button shield, and the elastic sealing element are all arranged in the cavity, the button is limited in the button shield so that it can only slide in the axial direction, a through hole is provided on the upper cover, the trigger assembly is in transmission cooperation with the button through the through hole, the elastic sealing element has an outer peripheral sealing ring located between the button shield and the upper cover, an inner peripheral sealing ring sleeved on the outer periphery of the button and in sealing cooperation with the button, and an elastic expansion structure connected between the outer peripheral sealing ring and the inner peripheral sealing ring, and the elastic expansion structure comprises a U-shaped ring.

[0005] A matching clamping groove is provided on the outer periphery of the button, and the inner peripheral sealing ring is clamped in the matching clamping groove to form fixed connection cooperation.

[0006] A limiting groove is provided on the outer periphery of the through hole at the lower end of the upper cover, the limiting groove is adaptively shaped with the outer periphery of the button shield, the upper end portion of the button shield protrudes into the limiting groove, and the outer peripheral sealing ring of the elastic sealing element is located in the limiting groove.

[0007] The elastic expansion structure comprises a first connecting ring, a U-shaped ring, and a second connecting ring connected in sequence from the inside to the outside, the inner periphery of the first connecting ring is directly connected with the outer periphery of the inner peripheral sealing ring, and the outer periphery of the second connecting ring is connected with the inner periphery of the outer peripheral sealing ring.

[0008] The outer periphery of the second connecting ring and the inner periphery of the outer peripheral sealing ring are connected through a longitudinal connecting ring, and the longitudinal connecting ring protrudes into the through hole.

[0009] The longitudinal connecting ring is tightly fitted with the through hole.

[0010] The button guard shield comprises an outer peripheral fixed ring and an inner peripheral limiting ring, the outer peripheral sealing ring is fixed between the outer peripheral fixed ring and the upper cover, the button is limited in the inner peripheral limiting ring and can only slide in the axial direction, a limiting disc is arranged at the lower end of the button, the limiting disc is located in the outer peripheral fixed ring, and the inner peripheral limiting ring is connected to the upper end of the outer peripheral fixed ring.

[0011] The inner peripheral limiting ring is located in the longitudinal connecting ring, and the upper end of the inner peripheral limiting ring forms a fitting ring which is sleeved between the longitudinal connecting ring and the U-shaped ring.

[0012] The lower end of the upper cover is provided with a first convex ring at the outer periphery of the through hole, and a fitting plane is formed at the outer periphery of the first convex ring, the upper end surface of the outer peripheral sealing ring is protruded to form a second convex ring located at the middle part and a third convex ring located at the outer periphery, the second convex ring is located at the outer periphery of the first convex ring, and the height of the second convex ring is greater than that of the first convex ring, and the second convex ring and the third convex ring are sealingly fitted with the fitting plane of the lower end of the upper cover.

[0013] The beneficial effects of the utility model are as follows: the elastic telescopic structure can make the inner peripheral sealing ring move axially freely along with the button and cannot form tension to the outer peripheral sealing ring, so that the button guard shield, the outer peripheral sealing ring and the upper cover can keep stable sealing, and the button and the inner peripheral sealing ring can keep stable sealing. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the utility model.

[0015] Figure 1 It is a structure schematic view of one embodiment of the utility model;

[0016] Figure 2 It is an explosion view of one embodiment of the utility model;

[0017] Figure 3 It is a sectional view of one embodiment of the utility model;

[0018] Figure 4 It is a structure schematic view of the elastic sealing member of one embodiment of the utility model;

[0019] Figure 5 It is a structure schematic view of the button of one embodiment of the utility model;

[0020] Figure 6 Structure schematic view of the upper cover of an embodiment of the utility model;

[0021] Figure 7 Structure schematic view of the button shield of an embodiment of the utility model;

[0022] Figure 8 For Figure 4 Enlarged view of part A in 6;

[0023] Figure 9 Enlarged view of part A in 6;

[0024] In the drawings, base-1, conductive assembly-2, button-3, matching clamping groove-301, limiting disc-302, button shield-4, outer peripheral fixing ring-401, inner peripheral limiting ring-402, matching ring-403, elastic sealing element-5, outer peripheral sealing ring-501, inner peripheral sealing ring-502, first connecting ring-503, U-shaped ring-504, second connecting ring-505, longitudinal connecting ring-506, second convex ring-507, third convex ring-508, push rod assembly-6, upper cover-7, through hole-701, limiting sleeve-702, limiting groove-703, first convex ring-704, trigger assembly-8. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model will be described in further detail below in combination with the drawings.

[0026] It should be noted that all the expressions of "first" and "second" in the embodiments of the utility model are used to distinguish two same name non-same entities or non-same parameters, and the "first" and "second" are only for the convenience of expression, and should not be understood as the limitation of the embodiments of the utility model, and the subsequent embodiments will not be described one by one.

[0027] The direction and position language mentioned in the utility model, such as up, down, front, back, left, right, inner, outer, top, bottom, side, etc., are only the direction or position of the drawings. Therefore, the direction and position language used is to explain and understand the utility model, and is not a limitation on the protection scope of the utility model.

[0028] A micro switch with waterproof structure, such as Figures 1-3As shown, the device includes a base 1, a conductive component 2, a button 3, a button cover 4, an elastic seal 5, a push rod assembly 6, a top cover 7, and a trigger assembly 8. The base 1 and the top cover 7 are connected to form a cavity. The conductive component 2, button 3, button cover 4, and elastic seal 5 are all disposed within the cavity. The top cover 7 has a through hole 701, and its upper end has a protruding limiting sleeve 702 at the through hole 701. One end of the trigger assembly 8 is located outside the top cover 7, and the other end extends into the limiting sleeve 702 and slides axially with the limiting sleeve 702. The conductive component 2 and the button cover 4 are fixed between the base 1 and the top cover 7. The button 3 is confined within the button cover 4, allowing it to slide only axially. The push rod assembly 6 drives the trigger assembly 8 and the button 3, driving the button 3 to slide axially and cooperate with the conductive component 2 to achieve the on / off state of the conductive component 2. Figure 4 As shown, the elastic sealing element 5 has an outer peripheral sealing ring 501 located between the button cover 4 and the upper cover 7, an inner peripheral sealing ring 502 sleeved on the outer periphery of the button 3 and sealingly fitted with the button 3, and an elastic telescopic structure connecting the outer peripheral sealing ring 501 and the inner peripheral sealing ring 502. The elastic telescopic structure includes a U-shaped ring 504.

[0029] The elastic telescopic structure allows the inner circumferential sealing ring 502 to move freely axially with the button 3 without exerting a pulling force on the outer circumferential sealing ring 501. This ensures a stable seal between the button cover 4, the outer circumferential sealing ring 501, and the top cover 7, while also maintaining a stable seal between the button 3 and the inner circumferential sealing ring 502.

[0030] Furthermore, such as Figure 4 As shown, the elastic telescopic structure includes a first connecting ring 503, a U-shaped ring 504, and a second connecting ring 505 connected sequentially from the inside to the outside. The inner circumference of the first connecting ring 503 is directly connected to the outer circumference of the inner circumference sealing ring 502, and the outer circumference of the second connecting ring 505 is connected to the inner circumference of the outer circumference sealing ring 501.

[0031] Furthermore, such as Figure 5 As shown, the button 3 has a mating groove 301 on its outer periphery, and the inner periphery sealing ring 502 is engaged in the mating groove 301 to form a fixed connection between the two.

[0032] like Figure 6 As shown, the lower end of the upper cover 7 is provided with a limiting groove 703 on the outer periphery of the through hole 701. The limiting groove 703 is adapted to the outer periphery shape of the button cover 4. The upper part of the button cover 4 extends into the limiting groove 703 and the outer periphery sealing ring 501 of the elastic sealing member 5 is located in the limiting groove 703.

[0033] like Figure 4As shown, the outer periphery of the second connecting ring 505 is connected with the inner periphery of the outer periphery sealing ring 501 through the longitudinal connecting ring 506, and the longitudinal connecting ring 506 extends into the through hole 701.

[0034] As shown, Figure 7 The button shroud 4 includes an outer periphery fixing ring 401 and an inner periphery limiting ring 402, the outer periphery sealing ring 501 is fixed between the outer periphery fixing ring 401 and the upper cover 7, and the button 3 is limited in the inner periphery limiting ring 402 so as to be capable of sliding in the axial direction only.

[0035] Further, the button 3 is provided with a limiting disc 302 at the lower end, the limiting disc 302 is located in the outer periphery fixing ring 401, and the inner periphery limiting ring 402 is connected to the upper end of the inner periphery of the outer periphery fixing ring 401, thereby providing a sliding space for the limiting disc 302.

[0036] Further, the inner periphery limiting ring 402 is located in the longitudinal connecting ring 506, and the upper end of the inner periphery limiting ring 402 forms a matching ring 403 which is sleeved between the longitudinal connecting ring 506 and the U-shaped ring 504, thereby forming a limiting effect on the elastic expansion structure and avoiding excessive deformation of the elastic expansion structure.

[0037] Further, as shown, Figure 8 、 Figure 9 The upper cover 7 is provided with a first convex ring 704 at the outer periphery of the through hole 701, and a matching plane is formed at the outer periphery of the first convex ring 704, the upper end surface of the outer periphery sealing ring 501 is protruded to form a second convex ring 507 located in the middle and a third convex ring 508 located at the outer periphery, the second convex ring 507 is located at the outer periphery of the first convex ring 704, and the height of the second convex ring 507 is greater than the height of the first convex ring 704, and the second convex ring 507 and the third convex ring 508 are sealingly matched with the matching plane at the lower end of the upper cover 7.

[0038] The above disclosure is only the preferred embodiment of the utility model, and of course cannot limit the scope of the utility model, therefore, the equivalent changes made according to the utility model claim still belong to the scope covered by the utility model.

Claims

1. A micro switch with a waterproof structure, comprising a base (1), a conductive component (2), a button (3), a button cover (4), an elastic seal (5), and a trigger component (8), wherein the base (1) and the top cover (7) are connected to form a cavity, the conductive component (2), the button (3), the button cover (4), and the elastic seal (5) are all disposed in the cavity, the button (3) is confined within the button cover (4) so ​​that it can only slide axially, the top cover (7) is provided with a through hole (701), and the trigger component (8) is driven to cooperate with the button (3) through the through hole (701), characterized in that: The elastic seal (5) has an outer peripheral seal ring (501) between the button cover (4) and the upper cover (7), an inner peripheral seal ring (502) sleeved on the outer periphery of the button (3) and in sealing cooperation with the button (3), and an elastic extension structure connected between the outer peripheral seal ring (501) and the inner peripheral seal ring (502), wherein the elastic extension structure comprises a U-shaped ring (504).

2. The waterproof micro switch according to claim 1, characterized in that: The outer periphery of the button (3) is provided with a matching clamping groove (301), and the inner peripheral seal ring (502) is clamped in the matching clamping groove (301) to form a fixed connection therebetween.

3. The waterproof micro switch according to claim 1, wherein: The lower end of the upper cover (7) is provided with a limiting groove (703) on the outer periphery of the through hole (701), the limiting groove (703) is matched in shape with the outer periphery of the button cover (4), the upper end of the button cover (4) extends into the limiting groove (703), and the outer peripheral seal ring (501) of the elastic seal (5) is located in the limiting groove (703).

4. The waterproof micro switch according to claim 1, wherein: The elastic extension structure comprises a first connecting ring (503), a U-shaped ring (504) and a second connecting ring (505) connected in sequence from inside to outside, the inner periphery of the first connecting ring (503) is directly connected with the outer periphery of the inner peripheral seal ring (502), and the outer periphery of the second connecting ring (505) is connected with the inner periphery of the outer peripheral seal ring (501).

5. The waterproof micro switch according to claim 4, characterized in that: The outer periphery of the second connecting ring (505) and the inner periphery of the outer peripheral seal ring (501) are connected through a longitudinal connecting ring (506), and the longitudinal connecting ring (506) extends into the through hole (701).

6. The waterproof micro switch according to claim 5, characterized in that: The longitudinal connecting ring (506) is in close cooperation with the through hole (701).

7. The waterproof micro switch according to claim 5, characterized in that: The button cover (4) comprises an outer peripheral fixed ring (401) and an inner peripheral limiting ring (402), the outer peripheral seal ring (501) is fixed between the outer peripheral fixed ring (401) and the upper cover (7), and the button (3) is limited in the inner peripheral limiting ring (402) so as to be able to slide only in the axial direction; the lower end of the button (3) is provided with a limiting disc (302), the limiting disc (302) is located in the outer peripheral fixed ring (401), and the lower end of the inner peripheral limiting ring (402) is connected to the upper end of the inner periphery of the outer peripheral fixed ring (401).

8. The waterproof micro switch according to claim 7, characterized in that: The inner peripheral limiting ring (402) is located in the longitudinal connecting ring (506), and the upper end of the inner peripheral limiting ring (402) forms a matching ring (403) sleeved between the longitudinal connecting ring (506) and the U-shaped ring (504).

9. The waterproof micro switch according to claim 1, wherein: The lower end of the upper cover (7) is provided with a first protruding ring (704) on the outer periphery of the through hole (701), and a matching flat surface is formed on the outer periphery of the first protruding ring (704), the upper end surface of the outer peripheral seal ring (501) is protruded to form a second protruding ring (507) located in the middle and a third protruding ring (508) located on the outer periphery, the second protruding ring (507) is located on the outer periphery of the first protruding ring (704), the height of the second protruding ring (507) is greater than the height of the first protruding ring (704), and the second protruding ring (507) and the third protruding ring (508) are in sealing cooperation with the matching flat surface at the lower end of the upper cover (7).

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