Tact switch with dustproof structure

Abstract

The utility model belongs to the field of microswitch, specifically is a kind of microswitch with dustproof structure, including base and shell mechanism, the top of base is equipped with lug, shell top and bottom are equipped with through opening and recess.Quick disassembly and assembly are realized by the snap connection of the clamping block of shell bottom and the clamping groove of base support, adjustable screw is matched in support through slot to adapt to different installation hole distance, sealing sleeve is embedded in shell through opening, its top is connected with rubber sealing cover and pressing rod, forms dynamic double sealing barrier, when pressing, rubber cover is always adhered to the inner wall of recess by elastic deformation, base top end is bonded with sealing pad, shell bottom compacts sealing pad and blocks external dust, lug and shell through opening are matched to constitute physical dustproof layer.The utility model is through multiple sealing structure, modular assembly design and self-adapting adjustment function, significantly improves dustproof performance and maintenance convenience.

Description

Technical Field

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

[0002] A tactile switch is a common electronic component that is a momentary switch that turns a circuit on or off by a slight press. It is widely used in electronic devices, home appliances, digital products and other fields.

[0003] However, in harsh environments such as dust and humidity, traditional switches have the following drawbacks:

[0004] 1. Dustproof structures are mostly static seals, which cannot adapt to the dynamic deformation caused by frequent button presses, and are prone to wear and leakage. There is a gap between the pressing rod and the housing, and dust can easily enter, causing contact oxidation or poor contact.

[0005] 2. The fixed installation specifications result in poor applicability to different installation locations of various sizes; therefore, a tactile switch with a dustproof structure is proposed to address the above problems. Utility Model Content

[0006] To overcome the shortcomings of existing technologies, such as poor sealing, easy dust ingress, and poor installation applicability, this utility model proposes a tactile switch with a dustproof structure.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a tactile switch with a dustproof structure, including a base and a housing mechanism, wherein the top of the base protrudes upward to form a protrusion.

[0008] The housing mechanism includes a housing, the top of which has a groove and a through opening, and the bottom of which has a through opening.

[0009] The protrusion mates with the through-hole, a locking block is fixedly connected to the bottom of the housing, a support leg is fixedly connected to the outer surface of the base, a slot is provided on the top of the support leg, the locking block is snapped into the slot on the top of the support leg, a sealing sleeve is fitted inside the through-hole, a rubber sealing cover is fixedly connected to the top of the sealing sleeve, a pressing rod is fixedly connected to the top of the rubber sealing cover, the bottom of the pressing rod moves through the sealing sleeve, a fixing block is fixedly connected to the top of the base, a contact block is embedded in the fixing block, and a movable contact block is fixedly connected to the bottom of the pressing rod.

[0010] Preferably, a sealing gasket is adhered to the top of the base, and the bottom of the housing overlaps the top surface of the sealing gasket.

[0011] Preferably, the bottom of the pressing rod has a groove, and a spring is fitted inside the groove of the pressing rod.

[0012] Preferably, the bottom end of the spring overlaps the top surface of the fixing block, and the contact block is located at the center of the fixing block and inside the spring.

[0013] Preferably, the bottom of the contact block is fixedly connected with a pin, which penetrates through the base.

[0014] Preferably, the bottom of the support leg is provided with a through groove, and a screw is fitted into the through groove of the support leg.

[0015] Preferably, the threaded end of the screw overlaps the outer surface of the support leg, and the threaded end of the screw passes through the through groove of the support leg.

[0016] Preferably, there are four of each of the locking blocks, legs, and screws, all distributed at equal angles. The top of the sealing sleeve extends downward to fit into the groove, and the bottom of the sealing sleeve extends outward and overlaps the top of the inner wall of the housing.

[0017] The advantages of this utility model are:

[0018] 1. This utility model uses a sealing sleeve that extends from the top and embeds into the groove of the housing, and the bottom extends outward to form a skirt structure, which is interference-fitted with the inner wall of the housing to achieve the first static seal. The rubber sealing cover elastically deforms when the pressing rod moves up and down, always fitting against the inner wall of the groove to form a dynamic seal, thus solving the problem of easy wear of traditional single-layer seals.

[0019] 2. This utility model, through the equal-angle snap-fit ​​design of the locking block and the support leg, and with the adjustable screw, allows the seal to be replaced without disassembling the switch body. The through groove of the support leg and the thread adjustment of the screw can be adapted to equipment panels of different thicknesses, thus improving the applicability of installation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a tactile switch.

[0022] Figure 2 This is a schematic diagram of the top structure of the housing mechanism of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the base, protrusion, support leg, screw, fixing block, contact block and pin connection of this utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of a tactile switch;

[0025] Figure 5 This is a schematic diagram of the structure at the bottom of the tactile switch;

[0026] Figure 6 This is a schematic diagram of the bottom structure of the shell mechanism of this utility model.

[0027] In the diagram: 1. Base; 101. Protrusion; 2. Housing mechanism; 201. Housing; 202. Groove; 203. Through port; 204. Groove; 3. Pressing rod; 4. Locking block; 5. Support leg; 6. Screw; 7. Sealing sleeve; 8. Rubber sealing cover; 9. Fixing block; 10. Contact block; 11. Pin; 12. Spring; 13. Moving contact block; 14. Sealing gasket. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0030] This application discloses a tactile switch with a dustproof structure. (Refer to...) Figures 1 to 6 A tactile switch with a dustproof structure includes a base 1 and a housing 2. The top of the base 1 protrudes upward to form a protrusion 101. A sealing gasket 14 is adhered to the top of the base 1. The bottom of the housing 201 overlaps the top surface of the sealing gasket 14.

[0031] Preferably, the sealing gasket 14 is made of silicone, which automatically fills the gap when the bottom of the housing 201 is pressed.

[0032] The housing mechanism 2 includes a housing 201, the top of the housing 201 is provided with a groove 202 and a through opening 203, and the bottom of the housing 201 is provided with a through opening 203.

[0033] The protrusion 101 is fitted into the through-hole 203. A locking block 4 is fixedly connected to the bottom of the housing 201. A support leg 5 is fixedly connected to the outer surface of the base 1. A slot is provided on the top of the support leg 5. The locking block 4 is snapped into the slot on the top of the support leg 5. A through-slot is provided on the bottom of the support leg 5. A screw 6 is fitted into the through-slot of the support leg 5. The threaded end of the screw 6 overlaps the outer surface of the support leg 5. The threaded end of the screw 6 passes through the through-slot of the support leg 5. There are four locking blocks 4, four support legs 5, and four screws 6, and they are all distributed at equal angles.

[0034] By adjusting the spacing of the screws on the four feet, it is compatible with the mounting hole spacing of different device panels.

[0035] A sealing sleeve 7 is fitted inside the opening 203. The top of the sealing sleeve 7 extends downward to fit into the groove 202, and the bottom of the sealing sleeve 7 extends outward and overlaps the top of the inner wall of the housing 201. A rubber sealing cover 8 is fixedly connected to the top of the sealing sleeve 7. When pressed, the upper part of the rubber sealing cover 8 stretches and thins, and the lower part compresses and thickens, always maintaining close contact with the groove 202.

[0036] Preferably, the sealing sleeve 7 is made of PTFE material.

[0037] The top of the rubber sealing cover 8 is fixedly connected to a pressing rod 3. The bottom of the pressing rod 3 has a groove. A spring 12 is fitted inside the groove of the pressing rod 3 to press the sealing sleeve 7 into the opening 203 at the top of the housing. The outer diameter of the bottom of its skirt is larger than that of the opening, forming an interference fit.

[0038] Preferably, the spring 12 is made of 304 stainless steel, and the moving contact block 13 and the contact block 10 are made of silver-plated copper alloy.

[0039] The bottom end of the spring 12 overlaps the top surface of the fixing block 9. The contact block 10 is located at the center of the fixing block 9. The bottom of the contact block 10 is fixedly connected to a pin 11. The pin 11 passes through the base 1 and is located inside the spring 12. The bottom of the pressing rod 3 moves through the sealing sleeve 7. The top of the base 1 is fixedly connected to the fixing block 9. The contact block 10 is embedded in the fixing block 9. The bottom end of the pressing rod 3 is fixedly connected to a movable contact block 13.

[0040] Housing assembly: Align the locking block 4 of housing 201 with the locking groove of the support foot 5 and press down until the bottom of the housing contacts the sealing gasket 14. At this time, the screw 6 can be screwed into the pre-drilled hole of the equipment panel for fixation. The housing 201, base 1, sealing sleeve 7 and rubber sealing cover 8, together with the pressing rod 3, form a dustproof structure.

[0041] Working principle:

[0042] When the user presses down the lever 3, it causes the bottom moving contact block 13 to move downward, compressing the spring 12. The moving contact block 13 then contacts the contact block 10 embedded in the fixed block 9, and the circuit is connected through the pin 11 to realize the switching function.

[0043] After the press is released, the spring 12 rebounds and pushes the pressing rod 3 to reset, the moving contact block 13 disengages from the contact block 10, and the circuit is disconnected.

[0044] The top of the sealing sleeve 7 extends to the groove 202, and the bottom extends outward to fit tightly against the inner wall of the housing, forming a double-layer dynamic sealing barrier. The rubber sealing cover 8 is fixed to the top of the pressing rod 3 and deforms to fit the groove 202 as it is pressed, preventing dust from entering from the pressing port. The top of the base 1 is bonded with the sealing gasket 14, and the bottom of the housing 201 is pressed tightly against the sealing gasket 14 to block dust from entering the internal cavity. The protrusion 101 is embedded in the bottom opening 203 of the housing 201, forming the first line of physical dust prevention. The housing clip 4 and the base support 5 are engaged in the slot to ensure that the housing 201 and the base 1 are tightly closed.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A tactile switch with a dustproof structure, comprising a base (1), wherein the top of the base (1) protrudes upward to form a protrusion (101), characterized in that: It also includes a housing mechanism (2), which includes a housing (201), the top of the housing (201) having a groove (202) and a through opening (203), and the bottom of the housing (201) having a through opening (203). The protrusion (101) is fitted to the through-hole (203). A locking block (4) is fixedly connected to the bottom of the housing (201). A support leg (5) is fixedly connected to the outer surface of the base (1). A slot is opened on the top of the support leg (5). The locking block (4) is snapped into the slot on the top of the support leg (5). A sealing sleeve (7) is fitted inside the through-hole (203). A rubber sealing cover (8) is fixedly connected to the top of the sealing sleeve (7). A pressing rod (3) is fixedly connected to the top of the rubber sealing cover (8). The bottom of the pressing rod (3) moves through the sealing sleeve (7). A fixing block (9) is fixedly connected to the top of the base (1). A contact block (10) is embedded in the fixing block (9). A moving contact block (13) is fixedly connected to the bottom of the pressing rod (3).

2. A tactile switch with a dustproof structure according to claim 1, characterized in that: A sealing gasket (14) is bonded to the top of the base (1), and the bottom of the housing (201) overlaps the top surface of the sealing gasket (14).

3. A tactile switch with a dustproof structure according to claim 1, characterized in that: The bottom of the pressing rod (3) is provided with a groove, and a spring (12) is sleeved in the groove of the pressing rod (3).

4. A tactile switch with a dustproof structure according to claim 3, characterized in that: The bottom end of the spring (12) overlaps the top surface of the fixing block (9), and the contact block (10) is located at the center of the fixing block (9) and inside the spring (12).

5. A tactile switch with a dustproof structure according to claim 4, characterized in that: The bottom of the contact block (10) is fixedly connected to a pin (11), which passes through the base (1).

6. A tactile switch with a dustproof structure according to claim 1, characterized in that: The bottom of the support leg (5) is provided with a through groove, and a screw (6) is fitted in the through groove of the support leg (5).

7. A tactile switch with a dustproof structure according to claim 6, characterized in that: The threaded end of the screw (6) overlaps the outer surface of the support leg (5), and the threaded end of the screw (6) passes through the through groove of the support leg (5).

8. A tactile switch with a dustproof structure according to claim 1, characterized in that: The four clips (4), the four legs (5), and the four screws (6) are all distributed at equal angles. The top of the sealing sleeve (7) extends downward to fit into the groove (202), and the bottom of the sealing sleeve (7) extends outward and overlaps the top of the inner wall of the housing (201).

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