Microswitch

Abstract

The utility model provides a microswitch, and belongs to the technical field of switches. Comprising a switch body, the bottom of a wiring terminal of the switch body is connected with a wire, the switch further comprises two fixing plates, the two fixing plates are fixed at the bottom of the switch body, and the wiring terminal of the switch body is located between the two fixing plates. According to the utility model, through the arrangement of the front box body, the rear box body, the sealing gasket and the sealing strip, the front box body and the rear box body are installed at the fixing plate, the sealing between the front box body and the rear box body and the sealing between the front box body and the switch body and between the rear box body and the switch body are realized through the sealing gasket, and the sealing strip is used for the sealing between the front box body and the lead and between the rear box body and the lead. Therefore, a closed space is formed at the joint of the lead and the switch body wiring terminal, local temperature increase caused by damp at the joint of the lead and the switch body wiring terminal is prevented, and heating, burnout and even fire breakout of the wiring terminal or the lead are effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a micro switch. Background Art

[0002] A micro switch is a small electronic switch that is usually used to control the on / off state of a circuit. A micro switch usually consists of a spring-loaded movable arm, a contact, a fixed arm, and a housing. When an external force moves the movable arm, the contact will connect or disconnect the circuit, thereby realizing the function of the switch. By connecting the wire to the wiring terminal of the micro switch, the micro switch can be connected to the circuit where the wire is located.

[0003] When a common micro switch is in use, after the wire is connected to the terminal of the micro switch, the connection position is usually directly exposed to the outside. When in a humid state, oxidation is likely to occur at the terminal, which can easily cause an increase in the resistance value of the connection between the two. When the resistance value increases, the local temperature of the connection between the two increases, which can easily cause the terminal or wire to heat up, burn out, or even catch fire. Therefore, the present application provides a micro switch to meet the needs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a micro switch to solve the technical problem that when in a humid state, oxidation is easy to occur at the connection terminal, and oxidation is easy to cause the resistance value of the connection between the two to increase. After the resistance value increases, the local temperature of the connection between the two increases, which is easy to cause the connection terminal or the wire to heat up, burn out or even catch fire.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A micro switch comprises a switch body, a wiring terminal of the switch body having a bottom connected to a wire, and further comprising:

[0007] A fixing plate, wherein the number of the fixing plates is two, and the two fixing plates are both fixed at the bottom of the switch body, the wiring terminals of the switch body are located between the two fixing plates, the facing away surfaces of the two fixing plates are respectively detachably connected with the front box body and the rear box body, the opposite surfaces of the front box body and the rear box body are both fixed with sealing gaskets, the opposite surfaces of the two sealing gaskets fit each other, and the tops of the sealing gaskets fit with the bottom of the switch body, the opposite surfaces of the front box body and the rear box body are both fixed with sealing strips, the ends of the sealing strips are fixedly connected to the sides of the sealing gaskets, the sides of the sealing strips fit with the circumferential surfaces of the wires, and the front box body and the rear box body are both provided with auxiliary sealing structures, and the auxiliary sealing structures are used to improve the sealing between the front box body and the rear box body and the wires.

[0008] Preferably, the opposite surfaces of the two fixing plates are commonly connected with a connecting block.

[0009] Preferably, the sealing strip is in an arc shape, and the center of the sealing strip is located on the central axis of the wire.

[0010] Preferably, the auxiliary sealing structure includes two cavities opened in the front box body and the rear box body, a piston is slidably connected in the cavity, the facing surfaces of the front box body and the rear box body are threadedly connected with a sealing plate, a threaded groove is opened on the sealing plate, a bolt is threadedly connected to the inner wall of the threaded groove, the end of the bolt abuts against the side of the piston, a channel is opened on the side of the inner wall of the cavity, a rubber membrane is fixed in the channel, semicircular grooves are opened on the opposite surfaces of the front box body and the rear box body, the semicircular grooves are connected with the channel, and the cavity and the channel are filled with sealant.

[0011] Preferably, a guide block is fixed to a side of the inner wall of the cavity away from the sealing plate, and a side surface of the guide block is provided with a curved surface protruding toward the piston.

[0012] Preferably, a groove is formed on a side of the piston away from the guide block, and the end of the bolt abuts against the side of the inner wall of the groove.

[0013] Preferably, two circular holes are formed on the side of the sealing plate.

[0014] Preferably, the central axis of the bolt coincides with the central axis of the piston.

[0015] Compared with the prior art, the utility model has at least the following beneficial effects:

[0016] In the above scheme, the front box body and the rear box body are installed on the fixing plate by arranging the front box body, the rear box body, the sealing gasket and the sealing strip, and the sealing between the front box body and the rear box body and the sealing between the front box body and the rear box body and the switch body are achieved by the sealing gasket. The sealing strip is used to seal between the front box body and the rear box body and the wire, so as to form a closed space at the connection between the wire and the switch body terminal, so as to prevent the connection between the wire and the switch body terminal from being locally heated due to moisture, thereby effectively preventing the terminal or the wire from heating, burning or even catching fire.

[0017] Through the setting of the auxiliary sealing structure, after the front box body and the rear box body are fixed, the bolts of the auxiliary sealing structure are rotated to allow the piston to squeeze the sealant in the cavity, so that the sealant enters the semicircular groove position to further seal the connection between the front box body and the rear box body and the wire, thereby improving the sealing ability of the connection between the front box body and the rear box body and the wire, and further improving the sealing of the connection between the wire and the terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a right sectional view of the bolt position of the utility model;

[0021] Figure 3 It is a right sectional view of the sealing strip of the utility model;

[0022] Figure 4 It is a top view cross-sectional view of the piston of the utility model;

[0023] Figure 5 For the utility model Figure 4 A magnified view of the structure in the middle.

[0024] [Reference Signs]

[0025] 1. Switch body; 2. Front box body; 3. Rear box body; 4. Sealing gasket; 5. Sealing strip; 6. Fixing plate; 7. Wire; 8. Auxiliary sealing structure; 81. Cavity; 82. Piston; 83. Bolt; 84. Guide block; 85. Channel; 86. Semicircular groove; 87. Sealing plate; 88. Groove; 89. Rubber membrane; 9. Connecting block.

[0026] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0027] The following is a detailed description of a micro switch provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0028] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0029] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0030] like Figure 1-Figure 5 As shown, an embodiment of the utility model provides a micro switch, including a switch body 1, a wire 7 is connected to the bottom of the wiring terminal of the switch body 1, and further includes:

[0031] The fixing plates 6 are two in number. The two fixing plates 6 are fixed at the bottom of the switch body 1. The wiring terminals of the switch body 1 are located between the two fixing plates 6. The facing away surfaces of the two fixing plates 6 are detachably connected with the front box body 2 and the rear box body 3, respectively. The front box body 2 and the rear box body 3 together form a square box. The facing away surfaces of the two fixing plates 6 are fixed with screws. The front box body 2 and the rear box body 3 are respectively sleeved on the corresponding screws. The front box body 2 and the rear box body 3 can be installed and fixed by tightening the nuts on the screws. The front box body 2 and the rear box body 3 can be removed by unscrewing the nuts. The opposite surfaces of the front box body 2 and the rear box body 3 are fixed with sealing gaskets 4. The opposite surfaces of the two sealing gaskets 4 fit each other, and the top of the sealing gasket 4 is in contact with the switch body 1. The bottom of the sealing gasket 4 is fitted, the sealing gasket 4 is used for sealing between the front box body 2 and the rear box body 3, and for sealing between the front box body 2 and the rear box body 3 and the switch body 1. The opposite surfaces of the front box body 2 and the rear box body 3 are fixed with sealing strips 5, and multiple sealing strips 5 are respectively fixed on the arc surface positions on the opposite surfaces of the front box body 2 and the rear box body 3. The end of the sealing strip 5 is fixedly connected to the side of the sealing gasket 4, and the sealing strip 5 is fixed at the away surface of the two sealing gaskets 4. The side of the sealing strip 5 fits with the circumferential surface of the wire 7. The sealing strip 5 is used for sealing between the wire 7 and the front box body 2 and the rear box body 3. Auxiliary sealing structures 8 are provided in the front box body 2 and the rear box body 3. The auxiliary sealing structure 8 is used to improve the sealing between the front box body 2 and the rear box body 3 and the wire 7.

[0032] like Figure 2 As shown, in this embodiment, the opposite surfaces of the two fixing plates 6 are commonly connected with a connecting block 9, and the connecting block 9 is used to connect and fix the two fixing plates 6, so as to improve the deformation resistance of the fixing plates 6.

[0033] like Figure 4 As shown, in this embodiment, the sealing strip 5 is in an arc shape, and the center of the sealing strip 5 is located on the central axis of the wire 7, so that the sealing strip 5 fits tightly with the wire 7, thereby improving the sealing ability of the sealing strip 5 itself.

[0034] like Figure 2 and Figure 4 As shown, in this embodiment, the auxiliary sealing structure 8 includes two cavities 81 opened in the front box body 2 and the rear box body 3, a piston 82 is slidably connected in the cavity 81, and the diverging surfaces of the front box body 2 and the rear box body 3 are both threadedly connected with a sealing plate 87, a threaded groove is opened on the sealing plate 87, and a bolt 83 is threadedly connected to the inner wall of the threaded groove, and the end of the bolt 83 abuts against the side of the piston 82, a channel 85 is opened on the side of the inner wall of the cavity 81, and a rubber film 89 is fixed in the channel 85, and the rubber film 89 is made of rubber material, and the opposite surfaces of the front box body 2 and the rear box body 3 are opened with a semicircular groove 86, and the semicircular groove 86 is located between the upper and lower sealing strips 5, and the semicircular groove 86 It is connected to the channel 85, and both the cavity 81 and the channel 85 are filled with sealant. There are two channels 85 at the same cavity 81. The bolt 83 is rotated to rotate and move the bolt 83, and the bolt 83 squeezes the piston 82, so that the piston 82 squeezes the sealant in the cavity 81 along the inner wall of the cavity 81. The rubber film 89 in the channel 85 is broken after being squeezed. The sealant passes through the channel 85 and enters the semicircular groove 86, fills the internal space of the semicircular groove 86, and fits with the surface of the wire 7, so as to achieve sealing of the connection between the front box body 2 and the rear box body 3 and the wire 7, thereby improving the sealing of the connection between the front box body 2 and the rear box body 3 and the wire 7.

[0035] like Figure 4 As shown, in this embodiment, a guide block 84 is fixed on the side of the inner wall of the cavity 81 away from the sealing plate 87, and the side of the guide block 84 is provided with a curved surface protruding toward the piston 82. The guide block 84 is used to guide the flow of the sealant, so that the sealant automatically flows to the two channels 85 after being squeezed by the piston 82, thereby preventing the sealant from accumulating at the guide block 84.

[0036] like Figure 2 and Figure 4 As shown, in this embodiment, a groove 88 is provided on the side of the piston 82 away from the guide block 84, and the end of the bolt 83 abuts against the side of the inner wall of the groove 88. The end of the bolt 83 abuts in the groove 88, and when the bolt 83 moves, it can smoothly drive the piston 82 to move.

[0037] like Figure 4 As shown, in the present embodiment, two circular holes are provided on the side of the sealing plate 87. Through the design of the circular holes, when the sealing plate 87 is installed at the position of the cavity 81, the sealing plate 87 can be rotated by inserting the angle grinder wrench into the two circular holes, thereby fixing the sealing plate 87 at the cavity 81.

[0038] like Figure 4 As shown, in this embodiment, the central axis of the bolt 83 coincides with the central axis of the piston 82 , so that when the bolt 83 moves, it can smoothly drive the piston 82 to move along the inner wall of the cavity 81 .

[0039] Working principle: The front box body 2 and the rear box body 3 are respectively attached to the two fixing plates 6, the screws on the fixing plates 6 pass through the front box body 2 and the rear box body 3, and the nuts are tightened on the screws to achieve the installation and fixation of the front box body 2 and the rear box body 3. The sealing gasket 4 is used to achieve the sealing between the front box body 2 and the rear box body 3 and the sealing between the front box body 2 and the rear box body 3 and the switch body 1. The sealing strip 5 is used to seal between the front box body 2 and the rear box body 3 and the wire 7. After the installation and fixation is completed, the bolt 83 is rotated to rotate and move the bolt 83, and the bolt 83 squeezes the piston 82, so that the piston 82 squeezes the air along the inner wall of the cavity 81. The sealant in the cavity 81 and the rubber film 89 in the channel 85 are broken by the extrusion force, and the sealant passes through the channel 85 into the semicircular groove 86, fills the inner space of the semicircular groove 86, and fits with the surface of the wire 7, so as to seal the connection between the front box body 2 and the rear box body 3 and the wire 7. The sealing gasket 4, the sealing strip 5 and the sealant cooperate with each other to improve the sealing ability of the connection between the front box body 2 and the rear box body 3 and the wire 7, and prevent the connection between the wire 7 and the switch body 1 from having a local temperature increase due to moisture, thereby effectively preventing the wiring terminal or the wire 7 from heating, burning or even catching fire;

[0040] When the connection between the wire 7 and the wiring terminal needs to be released, the nut can be unscrewed from the screw rod to remove the front box body 2 and the rear box body 3 from the bottom of the switch body 1, and the connection between the wire 7 and the wiring terminal can be released after removal.

[0041] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, the specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A micro switch, comprising a switch body (1), wherein a wire (7) is connected to the bottom of a connection terminal of the switch body (1), characterized in that: Also includes: A fixing plate (6), wherein the number of the fixing plates (6) is two, the two fixing plates (6) are both fixed to the bottom of the switch body (1), the wiring terminal of the switch body (1) is located between the two fixing plates (6), the two fixing plates (6) are respectively detachably connected to the front box body (2) and the rear box body (3) on the opposite sides, the front box body (2) and the rear box body (3) are both fixed with sealing gaskets (4), the opposite sides of the two sealing gaskets (4) are in contact with each other, and the top of the sealing gasket (4) is in contact with the bottom of the switch body (1), the opposite sides of the front box body (2) and the rear box body (3) are both fixed with sealing strips (5), the end of the sealing strip (5) is fixedly connected to the side of the sealing gasket (4), the side of the sealing strip (5) is in contact with the circumferential surface of the wire (7), and the front box body (2) and the rear box body (3) are both provided with auxiliary sealing structures (8), the auxiliary sealing structures (8) are used to improve the sealing performance between the front box body (2) and the rear box body (3) and the wire (7).

2. The micro switch according to claim 1, characterized in that: The opposing surfaces of the two fixing plates (6) are commonly connected with a connecting block (9).

3. The micro switch according to claim 1, characterized in that: The sealing strip (5) is in an arc shape, and the center of the sealing strip (5) is located on the central axis of the wire (7).

4. The micro switch according to claim 1, characterized in that: The auxiliary sealing structure (8) comprises two cavities (81) provided in the front box body (2) and the rear box body (3), a piston (82) being slidably connected in the cavity (81), a sealing plate (87) being threadedly connected to the diverging surfaces of the front box body (2) and the rear box body (3), a threaded groove being provided on the sealing plate (87), a bolt (83) being threadedly connected to the inner wall of the threaded groove, an end of the bolt (83) being in contact with the side surface of the piston (82), a channel (85) being provided on the side surface of the inner wall of the cavity (81), a rubber membrane (89) being fixed in the channel (85), a semicircular groove (86) being provided on the opposite surfaces of the front box body (2) and the rear box body (3), the semicircular groove (86) being connected to the channel (85), and a sealing adhesive being filled in the cavity (81) and the channel (85).

5. The micro switch according to claim 4, characterized in that: A guide block (84) is fixed to a side of the inner wall of the cavity (81) away from the sealing plate (87), and a side surface of the guide block (84) is provided with a curved surface protruding in the direction of the piston (82).

6. The micro switch according to claim 5, characterized in that: A groove (88) is formed on a side of the piston (82) away from the guide block (84), and an end of the bolt (83) abuts against a side surface of an inner wall of the groove (88).

7. The micro switch according to claim 4, characterized in that: Two circular holes are formed on the side of the sealing plate (87).

8. The micro switch according to claim 4, characterized in that: The central axis of the bolt (83) coincides with the central axis of the piston (82).

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