Self-resetting sealed toggle switch structure

Abstract

The application discloses a self-resetting sealed toggle switch structure, which comprises a switch handle, a switch shell and a sealing component. The switch handle has a spherical fulcrum part. The switch shell has a shell top wall, and a top wall notch is formed on the top surface of the shell top wall and surrounds the periphery of the spherical fulcrum part. The top wall notch and the spherical fulcrum part jointly define a top wall groove with an upward opening. The sealing component is composed of a cover, a sealing gasket, a sealing bucket and a sealing ring. The application has the beneficial effects of providing excellent sealing for the toggle switch and ensuring the waterproofness, dustproofness and gasproofness between the switch handle and the switch shell.

Description

Technical Field

[0001] This invention relates to toggle switches, and more particularly, to a self-resetting sealed toggle switch structure. Background Technology

[0002] While existing self-resetting sealed toggle switches can perform self-resetting switching and circuit switching, the more poles there are, the worse the switching synchronization becomes, which can easily cause misjudgments of delayed connection in the flight control system, and the sealing performance is generally poor. Summary of the Invention

[0003] The purpose of this invention is to solve the problem of the generally poor sealing performance of toggle switches in the prior art, and to provide a novel self-resetting sealed toggle switch structure.

[0004] To achieve this objective, the technical solution of the present invention is as follows: a self-resetting sealed toggle switch structure, comprising,

[0005] The switch handle has a spherical pivot point.

[0006] A switch housing having a top wall, the top surface of which is formed with a notch surrounding the spherical fulcrum portion, the notch and the spherical fulcrum portion defining an upward-opening groove in the top wall; and,

[0007] A sealing component comprises a cover, a sealing gasket, a sealing hopper, and a sealing ring. The cover is positioned above the top wall of the housing, with its bottom surface abutting against the top surface of the top wall. The cover surrounds the spherical fulcrum, and its inner circumferential surface abuts against the outer circumferential surface of the spherical fulcrum. The sealing gasket, the sealing hopper, and the sealing ring are all placed inside a groove in the top wall. The sealing hopper has a horizontal portion and a vertical portion to form an L-shaped cross-section structure. The vertical portion surrounds the spherical fulcrum, with its inner circumferential surface abutting against the outer circumferential surface of the spherical fulcrum, and its top surface abutting against the cover. The bottom surfaces of the two parts abut against each other, and there is a vertical gap between the horizontal part and the cover. The sealing gasket is located in the vertical gap and surrounds the periphery of the vertical part. The inner circumferential surface of the sealing gasket abuts against the outer circumferential surface of the vertical part. The top surface of the sealing gasket abuts against the bottom surface of the cover. The bottom surface of the sealing gasket abuts against the top surface of the horizontal part. The sealing ring is located below the sealing hopper and surrounds the periphery of the spherical fulcrum. The inner circumferential surface of the sealing ring abuts against the outer circumferential surface of the spherical fulcrum. The top surface of the sealing ring abuts against the bottom surface of the horizontal part. The bottom surface of the sealing ring abuts against the bottom surface of the top wall groove.

[0008] As a preferred embodiment of a self-resetting sealed toggle switch structure, the cover is made of brass and the switch handle is made of steel.

[0009] As a preferred embodiment of a self-resetting sealed toggle switch structure, the sealing gasket is made of polytetrafluoroethylene.

[0010] As a preferred embodiment of a self-resetting sealed toggle switch structure, the sealing hopper is made of polytetrafluoroethylene.

[0011] As a preferred embodiment of a self-resetting sealed toggle switch structure, the sealing gasket is made of polytetrafluoroethylene.

[0012] Compared with the prior art, the beneficial effects of the present invention are at least as follows: it provides excellent sealing for the toggle switch, ensuring the waterproof, dustproof and gas-proof properties between the switch handle and the switch housing. Attached Figure Description

[0013] Figure 1 This is a perspective view of the self-resetting sealing switch of the present invention.

[0014] Figure 2 for Figure 1 A cross-sectional view of the switch on Line II.

[0015] Figure 3 for Figure 2 Diagram showing the lever at its limit position.

[0016] Figure 4 This is a cross-sectional view of the seal between the upper housing and the handle of a self-resetting sealing switch.

[0017] Figure 5 This is an isometric view of the slider mechanism of a self-resetting sealing switch.

[0018] Figure 6 Isometric view of the self-resetting sealing switch actuator (initial position and limit position).

[0019] Figure 7 This is the wiring diagram for a self-resetting sealed switch. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that these descriptions are for the purpose of aiding understanding the invention and do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

[0021] Please see Figures 1 to 7The figure shows a self-resetting sealed toggle switch structure. It consists of a handle 1, a sealing component 2, an upper housing 3, a slider mechanism 4, an edge terminal 5, a middle terminal 6, an actuator 7, a lower housing 8, a sealing gasket 9, and a special nut 10. The handle 1 drives the slider mechanism 4, which is sealed to the upper housing 3 via the sealing component 2 for waterproofing, dustproofing, and gas resistance. The slider mechanism 4 drives the actuator 7, connecting the edge terminal 5 and the middle terminal 6 via the actuator 7. All four parts are housed within the lower housing 8. The edge terminal 5 and the middle terminal 6 are embedded into the bottom of the lower housing 9 during thermoforming. Both the upper housing 3 and the lower housing 8 are made of thermosetting resin (e.g., phenolic plastic) to provide protection for the switch from the outside environment, and are sealed to the outside environment via the sealing gasket 8. The special nut 10 is riveted to the cover 21 to provide the switch's external interface. A typical shape of the handle 1 is shown below. Figure 3 As shown, it also has many other shapes, such as square, triangular, and various functional handles with fluorescent eyes, which will not be described in detail in the patent.

[0022] The sealing component 2 consists of a cover 21, a sealing gasket 22, a sealing hopper 23, and a sealing ring 24. The brass cover 21 cooperates with the steel handle 1. Since the coefficient of thermal expansion of brass is greater than that of steel, the handle 1 is less prone to cold welding or jamming. The polytetrafluoroethylene sealing hopper 23 and the sealing gasket 22 are attached to the spherical surface of the handle 1, which greatly reduces the rotational resistance of the handle 1. The sealing gasket 22, the sealing hopper 23, and the sealing ring 24 form the sealing component, which provides excellent sealing for the top of the product and ensures the waterproof, dustproof, and gas-proof properties between the handle 1 and the upper housing 3.

[0023] The slider mechanism 4 consists of a pressure plate 41, a large spring 42, a small spring 43, an upper slider 44, a limiting rivet 45, a lower slider 46, a guide rail 47, and rivets 48. The pressure plate 41 is mounted on the lower housing. The semi-circular ports 47a at both ends of the guide rail 47 mate with the surface of the pressure plate 41a. The elongated hole 47b in the middle of the guide rail 47 is used for the movement of the limiting rivet 45, and the length of the hole determines the stroke of the slider mechanism. The two parallel guide rails 47 are clearance-fitted with the upper slider 44. The upper slider 44 and the lower slider 46 are riveted together by the limiting rivet 45 and rivets 48. The limiting rivet 45 passes through the elongated hole 47b of the upper slider 44, the lower slider 46, and the guide rail 47. The large spring 42 and the small spring 43 are fitted together as an elastic energy storage component and contact the pressure plate 41 and the limiting rivet 45. Since the two parallel guide rails 47 constrain the upper slider 44 to only complete linear motion along the direction of the guide rails 47, the entire slider mechanism can complete the action requirements with high synchronization. The use of an elastic energy storage component as the energy source for the self-resetting process can reduce the impact of the limit rivet 45. Compared with a single spring, it improves the reliability and service life of the mechanism. The torque loading of the elastic energy storage component is non-linear, and the torque changes abruptly when approaching the action point. This prevents dead points from occurring during the switching action. At the same time, the sudden change in torque provides acceleration to the actuator 7, making the mechanism more efficient and more synchronized. The handle 1 is inserted into the recess of the upper slider 44 for action transmission. The structure is simple and the action is reliable.

[0024] The actuator 7 consists of a positioning pin 71, a contact piece 72, a spring rod 73, a support block 74, a moving contact 75, a push rod spring 76, and a bracket 77. The moving contact 75 is riveted to the contact piece 72. The contact piece 72a and the bracket 77b are connected by the positioning pin 71, which can rotate around the axis. The positioning pin 71 is fixed by the top of the edge terminal 5. The push rod spring 76 generates force by being limited by the spring rod 73 and the support block 74. That is, the V-groove 73a of the spring rod 73 contacts the bracket surface 77b, one end of the push rod spring 76 is pressed against the spring rod surface 73b, and the other end is pressed against the support block surface 74a. The force of the push rod spring 76 is realized by the relative displacement between the spring rod square groove 73c and the support block surface 74a. The support block boss 74b is used to limit the lateral displacement of the support block 74 in the contact piece groove 72b. The spring rod 73 is pressed against the bracket 77 by the spring rod 76. The use of rigid parts and limiting springs is more reliable, and the force analysis is simple and clear. The performance of the compression spring is superior to that of the tension spring. The slider mechanism 4 and the actuator 7 transmit force through the bracket 77. The force transmission between rigid parts is more directional and has better consistency than that between flexible parts. At the same time, the force can be adjusted according to the stiffness of the spring rod 73. In addition, as the angle of the bracket 77 changes, the spring rod 76 is compressed. When the bracket 77 moves to the vertical direction, the force transmitted by the spring rod 73 to the contact piece 72 through the support block 74 reaches the equilibrium position. After that, the movement of the bracket 77 breaks the dynamic balance of the contact piece 72. At this time, the compression force of the spring rod 76 provides driving force to the contact piece 72, so that the contact piece 72 connects with the terminal 6 and provides contact force for the moving contact. This mechanism has stable contact pressure, long service life, high operating efficiency, and the connection rate does not change with the change of the towing rate, thus improving the consistency of product connection.

[0025] Edge terminal 5 and center terminal 6 are embedded into the bottom during the thermoforming of the lower housing 9 to achieve integral molding. The knurled pattern on the bottom of the edge terminal 5 can adhere better to the substrate of the housing than the straight knurled pattern. In addition, the semi-circular grooves 5a and 5b on the edge terminal 5 can reduce stress concentration compared to the square groove. Regardless of whether it is in a high-temperature or low-temperature environment, it can be tightly bonded to phenolic plastic, providing a good sealing environment for the switch (more or less than two grooves will not achieve the same sealing effect). When the ambient temperature is high, because the expansion coefficient of the lower housing material 8 is greater than that of the edge terminal 5, the 8a and 8b parts of the lower housing 8 are tightly pressed against the upper side of the groove 5a and the lower side of the groove 5b of the edge terminal 5, which can maintain good sealing performance of the switch under high-temperature conditions. When the ambient temperature is low, because the contraction coefficient of the lower housing material 8 is greater than that of the edge terminal 5, the 8a and 8b parts of the lower housing 8 are tightly pressed against the lower side of the groove 5a and the upper side of the groove 5b of the edge terminal 5, which can maintain good sealing performance of the switch under low-temperature conditions. The bottom of the lower housing has a circular groove 8c at the mating part with the insert. After the switch is assembled, epoxy resin is injected into this groove to further enhance the sealing performance of the switch.

[0026] When the self-resetting sealed toggle switch of this invention is activated, the drive handle 1 moves to the right, transmitting force to the upper slider 44. This causes the upper slider 44 to drive the entire slider mechanism 4 to move linearly to the left along the guide rail 47. The limiting rivet 45 sequentially compresses the large spring 42 and the small spring 43 to complete energy storage. At the same time, the lower slider 46 pushes the three supports 77 in the actuator 7 to rotate counterclockwise around the positioning pin 71. The supports 77 drive the spring top rod 73 to rotate and compress it, causing the top rod spring 76 to compress and generate a force (the direction of the force is always along the spring top rod). (Axial direction of rod 73), at this time, the positioning pin 71 is located to the right of the force of the push rod spring 76. When the direction of the force of the push rod spring 76 passes through the positioning pin 71, the entire actuator 7 reaches balance. Continue to pull the handle 1 to drive the slider mechanism 4 to move. The positioning pin 71 will be located to the left of the force of the push rod spring 76. The balance of the actuator 7 is broken. The force of the push rod spring 76 drives the support block 74 and the contact piece 72 to rotate clockwise around the positioning pin 71, realizing the circuit connection between the edge terminal 5 and the middle terminal 6. The entire process of switching and connecting the circuit ends. When handle 1 is released, the elastic potential energy of the large spring 42 and small spring 43 in slider mechanism 4 is released, driving the limit rivet 45 to return to its initial position. The limit rivet 45 drives the upper slider 44 and lower slider 46 to move synchronously. At the same time, the upper slider 44 generates a contact force on the bracket 77, causing it to rotate clockwise around the positioning pin 71. The positioning pin 71 moves from the left side of the force of the top rod spring 76 past the equilibrium position to the right side, and the contact piece 72 separates from the middle terminal 6, breaking the circuit and ending the switch self-reset process.

[0027] The above description merely illustrates embodiments of the present invention and is quite detailed; however, it should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A self-resetting sealed toggle switch structure, characterized in that, Includes, The switch handle has a spherical pivot point. A switch housing having a top wall, the top surface of which is formed with a notch surrounding the spherical fulcrum portion, the notch and the spherical fulcrum portion defining an upward-opening groove in the top wall; and, A sealing component comprises a cover, a sealing gasket, a sealing hopper, and a sealing ring. The cover is positioned above the top wall of the housing, with its bottom surface abutting against the top surface of the top wall. The cover surrounds the spherical fulcrum, and its inner circumferential surface abuts against the outer circumferential surface of the spherical fulcrum. The sealing gasket, the sealing hopper, and the sealing ring are all placed inside a groove in the top wall. The sealing hopper has a horizontal portion and a vertical portion to form an L-shaped cross-section structure. The vertical portion surrounds the spherical fulcrum, with its inner circumferential surface abutting against the outer circumferential surface of the spherical fulcrum, and its top surface abutting against the cover. The bottom surfaces of the two parts abut against each other, and there is a vertical gap between the horizontal part and the cover. The sealing gasket is located in the vertical gap and surrounds the periphery of the vertical part. The inner circumferential surface of the sealing gasket abuts against the outer circumferential surface of the vertical part. The top surface of the sealing gasket abuts against the bottom surface of the cover. The bottom surface of the sealing gasket abuts against the top surface of the horizontal part. The sealing ring is located below the sealing hopper and surrounds the periphery of the spherical fulcrum. The inner circumferential surface of the sealing ring abuts against the outer circumferential surface of the spherical fulcrum. The top surface of the sealing ring abuts against the bottom surface of the horizontal part. The bottom surface of the sealing ring abuts against the bottom surface of the top wall groove.

2. The self-resetting sealed toggle switch structure according to claim 1, characterized in that, The cover is made of brass, and the switch handle is made of steel.

3. The self-resetting sealed toggle switch structure according to claim 1, characterized in that, The sealing gasket is made of polytetrafluoroethylene.

4. The self-resetting sealed toggle switch structure according to claim 1, characterized in that, The sealing hopper is made of polytetrafluoroethylene.

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