Double-section normally-closed dustproof membrane switch

Abstract

The utility model discloses a double-section normally-closed dustproof membrane switch, which comprises a base, an inner circular cavity is arranged in the base, an outer circular cavity with the depth lower than that of the inner circular cavity is arranged on the outer ring of the inner circular cavity, contact piece grooves are arranged at four corners of the outer circular cavity, and a first interference step is arranged on the base; the contact piece assembly comprises an inner contact piece I, an inner contact piece II, an outer contact piece I and an outer contact piece II; second interference steps are arranged on the bottom wall of the inner circular cavity on the inner sides of the inner contact piece I and the inner contact piece II; the pressing assembly comprises an inner elastic piece, a fixing yellow piece, a pressing contact piece and a dustproof cover plate, the outer ring of the pressing contact piece is provided with positioning feet distributed in a cross shape, and the positioning feet are embedded into the contact piece grooves. The whole base is of a square structure, and the inner contact piece, the outer contact piece and the pressing assembly are integrated on the base, so that the whole switch is small in size and suitable for being installed in electronic equipment with limited space. And circuit control of double circuits can be realized, and function diversification is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to thin film switch technical field, concretely is a kind of double-section normally closed dustproof thin film switch. BACKGROUND

[0002] With the development of science and technology, electronic devices are increasingly miniaturized and multifunctional, and the requirements for internal components, especially switches, are also increasingly high. Traditional mechanical switches are relatively large in size and are easily affected by dust and moisture, leading to poor contact or even failure, which limits their application in compact or environmentally sensitive electronic products to some extent. In addition, many modern electronic devices require switches not only to achieve simple on-off function, but also to provide multiple feedbacks according to different operating forces to meet more complex human-machine interaction requirements.

[0003] Currently, there are single-section thin film switches on the market, which solve the problems of traditional mechanical switches to some extent, but their functions are relatively single and cannot meet the demand of multi-level operation. Therefore, it is particularly important to develop a new type of thin film switch that can realize two-level or multi-level control in limited space and has good dustproof performance.

[0004] Based on the above background, the present application proposes an innovative design of double-section normally closed dustproof thin film switch, aiming to solve the problems existing in the prior art and provide a switch solution that is both small and has good dustproof effect and multi-level control capability. SUMMARY

[0005] The utility model provides a kind of double-section normally closed dustproof thin film switch to the deficiency in the background art.

[0006] The technical scheme adopted by the utility model is: a double-section normally closed dustproof thin film switch, comprising:

[0007] A base is provided with an inner circular cavity, and an outer circular cavity with a depth lower than the inner circular cavity is arranged outside the outer circle of the inner circular cavity. Four corners of the outer circular cavity are provided with a contact piece groove, and a first interference step is arranged on the base inside the contact piece groove.

[0008] A contact piece assembly is provided, which includes an inner contact piece one, an inner contact piece two, an outer contact piece one and an outer contact piece two. The outer contact piece one and the outer contact piece two are arranged on the lower left corner and the upper right corner of the base, and one end of the outer contact piece one and the outer contact piece two is located in the contact piece groove, and the other end extends out of the base. The inner contact piece one and the inner contact piece two are arranged on the upper left corner and the lower right corner of the base, and one end of the inner contact piece one and the inner contact piece two is located in the inner circular cavity, and the other end extends out of the base. A second interference step is arranged on the inner wall of the inner circular cavity at the inner side of the inner contact piece one and the inner contact piece two.

[0009] The pressing assembly includes an inner spring piece arranged in the inner circular cavity, a fixed yellow piece arranged above the inner spring piece, a pressing contact piece arranged on the fixed yellow piece, and a dust cover covering the base. The outer ring of the pressing contact piece has positioning feet distributed in a cross shape, and the positioning feet are embedded in the contact piece groove.

[0010] Furthermore, the upper surfaces of the inner contact piece 1, inner contact piece 2, outer contact piece 1 and outer contact piece 2 located in the inner circular cavity and the contact piece groove have raised contact points, the bottom of the contact points has a positioning concave surface, and the base is provided with a positioning boss matching the positioning concave surface.

[0011] Furthermore, a fixing hole is provided on the bottom wall of the contact slot.

[0012] Furthermore, the dust cover has a raised pressing surface in the middle.

[0013] Furthermore, a recessed surface is provided on the bottom wall of the base below the pressing convex surface.

[0014] Furthermore, positioning grooves are provided on both sides of the inner circular cavity, and positioning protrusions embedded in the positioning grooves are provided on the inner contact piece 1 and the inner contact piece 2.

[0015] The beneficial effects of the utility model are:

[0016] 1. Compact Structure: By integrating the inner and outer contacts and the push-button assembly into the base, the switch is compact and suitable for installation in electronic devices with limited space. This compact design helps improve the overall layout efficiency of the device and meets the miniaturization requirements of modern electronic products.

[0017] 2. Dual Control: This switch offers two levels of independent control. Specifically, a light press disconnects only outer contacts 1 and 2. Further pressure disconnects both inner contacts 1 and 2. This not only enhances the operational complexity of a single switch but also expands its application scenarios, such as those requiring multi-level responses or multiple protection mechanisms.

[0018] 3. Good dustproof performance: It adopts a closed structure and is equipped with a special dustproof cover to effectively prevent dust and foreign matter from entering the interior and affecting the electrical connection, thereby extending the service life of the product and ensuring long-term reliability.

[0019] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 It is an exploded view of the utility model.

[0022] Figure 3 It is a schematic view of the base.

[0023] Figure 4 It is a bottom schematic view of the contact assembly.

[0024] Figures 1-4 In: 1, base; 2, inner circular cavity; 3, outer circular cavity; 4, contact slot; 5, first interference step; 6, inner contact one; 7, inner contact two; 8, outer contact one; 9, outer contact two; 10, second interference step; 11, inner spring piece; 12, fixed yellow piece; 13, pressing contact; 14, dustproof cover plate; 15, positioning foot; 16, contact; 17, positioning concave surface; 18, positioning convex platform; 19, fixing hole; 20, pressing convex surface; 21, give way concave surface; 22, positioning recess; 23, positioning protrusion. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0026] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] The utility model provides a double section normally closed dustproof membrane switch.

[0028] In the embodiment, referring to Figures 1-4 , the double section normally closed dustproof membrane switch comprises:

[0029] The base 1 is internally provided with an inner circular cavity 2, and the outer circle of the inner circular cavity is provided with an outer circular cavity 3 with a depth lower than that of the inner circular cavity, four corners of the outer circular cavity 3 are provided with contact slots 4, and the base on the inner side of the contact slot 4 is provided with a first interference step 5;

[0030] The contact assembly includes inner contact one 6, inner contact two 7, outer contact one 8 and outer contact two 9, the outer contact one and the outer contact two are arranged on the lower left corner and the upper right corner of the base, and one end of the outer contact one and the outer contact two is located in the contact slot and the other end extends out of the base, the inner contact one and the inner contact two are arranged on the upper left corner and the lower right corner of the base, and one end of the inner contact one and the inner contact two is located in the inner circular cavity and the other end extends out of the base, a second interference step 10 is arranged on the inner circular cavity bottom wall inside the inner contact one and the inner contact two;

[0031] The pressing assembly includes inner elastic sheet 11 arranged in the inner circular cavity, fixed yellow sheet 12 arranged above the inner elastic sheet 11, pressing contact 13 arranged on the fixed yellow sheet 12, and dustproof cover plate 14 covering the base 1, the outer circle of the pressing contact has positioning feet 15 distributed in a cross shape, and the positioning feet 15 are embedded into the contact slot 4.

[0032] In the above technical solution, the base adopts a square structure as a whole, the inner contact, the outer contact and the pressing assembly are integrated on the base, so that the whole switch is small in size and suitable for being installed in the inside of electronic equipment with limited space, and the circuit control of the double circuits can be realized and the diversification of functions can be realized.

[0033] The basic principle is that only the outer contact one and the outer contact two are disconnected when pressed lightly, and the inner contact one and the inner contact two are disconnected at the same time after further applying pressure. In this way, not only the operation level of a single switch is increased, but also the application scenarios are expanded, such as being applied to occasions requiring multi-level response or multiple protection mechanisms.

[0034] Specifically, the upper surfaces of the inner contact one, the inner contact two, the outer contact one and the outer contact two located in the inner circular cavity and the contact slot have protruding contact points 16, the bottom of the contact point 16 has a positioning concave surface 17, and the base is provided with a positioning convex column 18 matched with the positioning concave surface.

[0035] In this embodiment, the upper surfaces of the inner contact one, the inner contact two, the outer contact one and the outer contact two have protruding contact points, the positioning concave surface at the bottom of the contact point is matched with the positioning convex column on the base, which ensures the accurate installation of the inner contact one, the inner contact two, the outer contact one and the outer contact two, and the setting of the contact point improves the reliability and stability of the electrical connection. In addition, the design of the positioning concave surface and the positioning convex column facilitates quick positioning during installation, simplifies the assembly process and reduces production cost.

[0036] Specifically, the bottom wall of the contact slot is provided with a fixing hole 19.

[0037] In this embodiment, the bottom wall of the contact slot is provided with a fixing hole, and the contact can be firmly fixed on the base by screws or other means.

[0038] Specifically, the middle part of the dustproof cover plate has a raised pressing convex surface 20.

[0039] In this embodiment, the middle part of the dustproof cover plate has a raised pressing convex surface, which provides a better hand feeling and enables the user to more clearly perceive the change in pressing force during operation, thereby improving the user experience.

[0040] Specifically, the base bottom wall below the pressing convex surface is provided with a concave surface 21.

[0041] In this embodiment, the base bottom wall below the pressing convex surface is provided with a concave surface, which allows the pressing convex surface to have a certain sinking space when the user presses the button, thereby reducing the pressure on the internal structure and helping to prolong the service life of the switch.

[0042] Specifically, the inner circular cavity is provided with positioning grooves 22 on both sides, and the inner contact piece one and the inner contact piece two are provided with positioning protrusions 23 embedded in the positioning grooves.

[0043] In this embodiment, the inner circular cavity is provided with positioning grooves on both sides, and the inner contact piece one and the inner contact piece two are provided with positioning protrusions embedded in the positioning grooves, which ensures the accurate position of the contact piece during installation, prevents the contact piece from shifting, and improves the assembly quality and working stability of the product.

[0044] Note to all technical personnel: Although the utility model has been described in the above specific embodiments, the utility model idea is not limited to this utility model, and any modification using the utility model idea will be included in the scope of protection of this patent.

Claims

1. A two-stage normally closed dustproof membrane switch, characterized in that include: A base, wherein an inner circular cavity is provided in the base, an outer circular cavity is provided on the outer ring of the inner circular cavity and has a depth lower than that of the inner circular cavity, contact slots are provided on the four corners of the outer circular cavity, and a first interference step is provided on the base located inside the contact slot; A contact assembly comprising an inner contact piece 1, an inner contact piece 2, an outer contact piece 1, and an outer contact piece 2, wherein the outer contact piece 1 and the outer contact piece 2 are arranged at the lower left corner and the upper right corner of the base, and one end of the outer contact piece 1 and the outer contact piece 2 is located in the contact piece slot and the other end extends outside the base; the inner contact piece 1 and the inner contact piece 2 are arranged at the upper left corner and the lower right corner of the base, and one end of the inner contact piece 1 and the inner contact piece 2 is located in the inner circular cavity and the other end extends outside the base; a second interference step is provided on the bottom wall of the inner circular cavity inside the inner contact piece 1 and the inner contact piece 2; A pressing assembly includes an inner spring piece disposed in the inner circular cavity, a fixed yellow piece disposed above the inner spring piece, a pressing contact piece disposed on the fixed yellow piece, and a dust cover covering the base. The outer ring of the pressing contact piece has positioning feet distributed in a cross shape, and the positioning feet are embedded in the contact piece groove; The upper surfaces of the inner contact piece 1, inner contact piece 2, outer contact piece 1 and outer contact piece 2 located in the inner circular cavity and the contact piece groove have raised contact points, the bottoms of the contacts have positioning concave surfaces, and the base is provided with positioning bosses matching the positioning concave surfaces.

2. The dual-stage normally closed dustproof membrane switch according to claim 1, characterized in that: A fixing hole is provided on the bottom wall of the contact slot.

3. The dual-stage normally closed dustproof membrane switch according to claim 1, characterized in that: The middle part of the dustproof cover plate is provided with a raised pressing convex surface.

4. The dual-stage normally closed dustproof membrane switch according to claim 3, characterized in that: A recessed surface is provided on the bottom wall of the base below the pressing convex surface.

5. The dual-stage normally closed dustproof membrane switch according to claim 1, characterized in that: Positioning grooves are provided on both sides of the inner circular cavity, and positioning protrusions embedded in the positioning grooves are provided on the inner contact piece 1 and the inner contact piece 2.

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