A micro switch

Abstract

The present application relates to the technical field of switches, and discloses a micro switch, comprising an upper shell and a lower shell, wherein a moving contact piece and a stationary contact piece are arranged in the lower shell, and a button for driving the moving contact piece to abut against the stationary contact piece is slidably connected to the lower shell, and the moving contact piece comprises an elastic member and a moving piece, and the elastic member drives the moving piece and the stationary contact piece to separate, and a fixing plate is arranged on both the upper shell and the lower shell, and the fixing plate is located between the moving contact piece and the stationary contact piece. In the present application, the fixing plate is located between the moving contact piece and the stationary contact piece, and the fixing plate is located on the upper shell and the lower shell, so that the creepage distance in the upper shell and the creepage distance in the lower shell are both increased, thereby reducing the quality of the high-voltage resistant insulating material used in the upper shell and the lower shell, reducing the manufacturing cost of the upper shell and the lower shell, and reducing the cost of the micro switch; at the same time, the two fixing plates increase the distance of air flow between the moving contact piece and the stationary contact piece to prevent air breakdown and improve the safety performance of the micro switch.

Description

Technical Field

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

[0002] A micro switch is a switch that can be touched with a tiny force. It is a switch that disconnects or connects the circuit through an external force. Micro switches are widely used in electronic equipment, instrumentation, power systems or electrical equipment.

[0003] In the related technology, the micro switch includes an upper shell and a lower shell, a button is slidably connected to the lower shell, a moving contact piece and a static contact piece are arranged in the lower shell, the moving contact piece includes an elastic member and a moving piece, the elastic member drives the moving piece to move away from the static contact piece, the moving contact piece is located on the sliding path of the button, and the button drives the moving piece to abut against the static contact piece to realize the connection of the circuit.

[0004] An arc will be generated when the moving contact and the stationary contact are separated. Since the overall volume of the micro switch is small, the creepage distance between the moving contact and the stationary contact is small. Therefore, the upper shell and the lower shell need to be made of insulating materials with excellent high-voltage resistance quality, which makes the manufacturing cost of the upper shell and the lower shell high, and thus leads to a high cost of the micro switch. Summary of the invention

[0005] In order to improve the problem of high cost of micro switches, the present application provides a micro switch.

[0006] The present application provides a micro switch, which adopts the following technical solution:

[0007] A micro switch comprises an upper shell and a lower shell, wherein a moving contact piece and a stationary contact piece are arranged in the lower shell, a button for driving the moving contact piece to abut against the stationary contact piece is slidably connected to the lower shell, the moving contact piece comprises an elastic member and a moving piece, the elastic member drives the moving piece and the stationary contact piece to separate, and a fixing plate is arranged on both the upper shell and the lower shell, and the fixing plate is located between the moving contact piece and the stationary contact piece.

[0008] By adopting the above technical solution, the fixing plate is located between the moving contact piece and the stationary contact piece, and the fixing plate is located on the upper shell and the lower shell, so that the creepage distance in the upper shell and the creepage distance in the lower shell are increased, so that the quality of the high-voltage resistant insulating material used in the upper shell and the lower shell can be reduced, so that the manufacturing cost of the upper shell and the lower shell is reduced, and the cost of the micro switch is reduced; at the same time, the two fixing plates increase the air flow distance between the moving contact piece and the stationary contact piece to prevent air breakdown, thereby improving the safety performance of the micro switch.

[0009] Optionally, the elastic member includes an elastic spring and a mounting plate, the mounting plate is arranged on the lower shell, the elastic spring is rotatably connected to the mounting plate, the movable plate is rotatably connected to the elastic spring, and the elastic spring is located on the sliding path of the button.

[0010] By adopting the above technical solution, when the button is pressed, the elastic spring is located on the sliding path of the button, and the button drives the elastic spring to deform. In addition, the movable piece is rotated and connected to the elastic spring, so that the elastic spring drives the movable piece to move, so that the movable piece abuts against the static contact piece, and the two circuits are connected; when the button is not pressed, the elastic spring is reset, so that the elastic spring drives the movable piece to move, so that the movable piece and the static contact piece are separated, and the two circuits are disconnected.

[0011] Optionally, the movable contact piece further includes a first pin, the movable piece is rotatably connected to the first pin, the first pin is provided with a through hole for an elastic spring to pass through, and when the movable piece abuts against the stationary contact piece, the elastic spring is located at the through hole.

[0012] By adopting the above technical solution, a through hole is opened on the first pin for the elastic spring to pass through, and the deformation range of the elastic spring is increased without affecting the overall volume of the micro switch, so that the elastic spring can better drive the movable plate to move.

[0013] Optionally, a rotation groove for inserting a movable piece is provided on the first pin.

[0014] By adopting the above technical solution, the rotating groove through which the movable plate is inserted allows the groove wall of the rotating groove to restrict the movable plate, thereby reducing the excessive rotation of the movable plate on the first pin, so as to ensure that the rotation range of the movable plate does not exceed the deformation range of the elastic spring, avoid the elastic spring from being damaged due to excessive deformation, and extend the service life of the elastic spring.

[0015] Optionally, two baffles are provided on the moving plate, the two baffles are respectively located on different sides of the first pin, and the baffles abut against the first pin.

[0016] By adopting the above technical solution, the two baffles are respectively located on different sides of the first pin, and the baffles abut the first pin, so that the baffles can limit the movable plate from rotating in the direction toward the first pin close to the baffle, so that the movable plate can only rotate in the direction of the first pin toward or away from the static contact plate, so that the movable plate can stably abut the static contact plate.

[0017] Optionally, a fixing block is provided on the lower shell, and the fixing block is located on a side of the first pin facing the static contact piece, and when the first pin is installed on the lower shell, the first pin abuts against the fixing block.

[0018] By adopting the above technical solution, the fixing block is located on the side of the first pin facing the static contact piece, and the first pin abuts the fixing block, so that the fixing block restricts the first pin to prevent the first pin from moving toward the static contact piece, so that the distance between the first pin and the static contact piece will not decrease.

[0019] Optionally, a support bar is provided on the lower shell, and when the first pin abuts against the support bar, the first pin abuts against a fixing block.

[0020] By adopting the above technical solution, during the installation of the first pin, the first pin abuts against the support bar and the first pin abuts against the fixing block, so that the installation position of the first pin can be confirmed, which is convenient for the staff to install the first pin.

[0021] Optionally, a supporting surface is provided between a surface of the supporting bar facing the upper shell and a surface of the supporting bar facing the first pin.

[0022] By adopting the above technical solution, the first pin moves on the support bar through the support surface, so that the first pin can abut the support bar, reducing the accuracy of the staff in installing the first pin and facilitating the staff to install the first pin in the placement groove.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The fixing plate is located between the moving contact piece and the stationary contact piece, and the fixing plate is located on the upper shell and the lower shell, so that the creepage distance in the upper shell and the creepage distance in the lower shell are increased, so that the high-temperature resistant insulating material products used in the upper shell and the lower shell can be reduced, the manufacturing cost of the upper shell and the lower shell is reduced, and the castle of the micro switch is reduced; at the same time, the two fixing plates increase the distance of air flow between the moving contact piece and the stationary contact piece, avoid air breakdown, and improve the safety performance of the micro switch.

[0025] 2. The first pin is provided with a through hole for the elastic spring to pass through, so that the elastic spring can be deformed at the through hole, thereby increasing the deformation range of the elastic spring and allowing the elastic spring to better drive the movable plate to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0027] Figure 2 is an exploded schematic diagram highlighting the locking block in an embodiment of the present application;

[0028] Figure 3 is an exploded schematic diagram of a highlighted button in an embodiment of the present application;

[0029] Figure 4is a structural schematic diagram highlighting the moving contact piece in an embodiment of the present application;

[0030] Figure 5 is a structural schematic diagram highlighting the first pin in an embodiment of the present application;

[0031] Figure 6 is an exploded schematic diagram highlighting the support bar in an embodiment of the present application;

[0032] Figure 7 is an exploded schematic diagram highlighting the rotating slot in an embodiment of the present application;

[0033] Figure 8 It is a structural schematic diagram highlighting the upper shell in the embodiment of the present application.

[0034] Figure numerals: 1, upper shell; 11, locking strip; 12, locking hole; 13, first stop hole; 14, second stop hole; 15, stop ring; 2, lower shell; 21, locking groove; 22, locking block; 221, locking surface; 23, placement groove; 231, through hole; 232, sliding groove; 24, button; 241, sliding block; 25, first plug hole; 26, support strip; 261, support surface; 27, second plug hole; 28, fixed block; 281, fixed surface; 29, fixed plate; 3, moving contact piece; 31, first Pin; 311, first connecting part; 312, second connecting part; 313, third connecting part; 314, fourth connecting part; 315, rotating groove; 316, first mounting hole; 317, third mounting hole; 318, through hole; 32, elastic member; 321, elastic spring; 322, mounting plate; 323, first hook; 324, second hook; 33, moving plate; 331, blocking bar; 332, second mounting hole; 34, moving contact; 4, static contact; 41, second pin; 42, static plate; 43, static contact. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-8 This application is described in further detail.

[0036] This embodiment discloses a micro switch. Figure 1 A micro switch comprises an upper shell 1 and a lower shell 2. The upper shell 1 is provided with a locking piece, and the locking piece realizes the mutual fixation of the upper shell 1 and the lower shell 2.

[0037] Reference Figure 2 The locking member includes two locking strips 11, which have elastic deformation capability. The locking strips 11 are integrally formed on the surface of the upper shell 1, and the two locking strips 11 are respectively located on both sides of the upper shell 1.

[0038] Reference Figure 2The surface of the lower shell 2 is provided with a locking groove 21 for inserting the locking strip 11, and two locking grooves 21 are provided, and the two locking grooves 21 are respectively located on both sides of the lower shell 2. Two locking blocks 22 are integrally formed on the surface of the lower shell 2, and the two locking blocks 22 are respectively located on different sides of the lower shell 2. The surface of the locking strip 11 is provided with a locking hole 12, and the locking block 22 can be inserted into the locking hole 12. In other embodiments, the upper shell 1 and the lower shell 2 can be fixed to each other by one or more of the following methods, such as clamping, interference fit, and bolt connection.

[0039] Reference Figure 2 A locking surface 221 is provided between the surface of the locking block 22 facing the insertion direction of the upper shell 1 and the surface of the locking block 22 away from the bottom wall of the locking groove 21, and the locking surface 221 is located on the insertion path of the locking strip 11. When the locking strip 11 is deformed by the locking surface 221, the locking strip 11 is smoothly located in the locking groove 21, and the locking block 22 is located in the locking hole 12, so that the upper shell 1 and the lower shell 2 are fixed to each other.

[0040] Reference Figure 2 The upper shell 1 is provided with two first stop holes 13, and the lower shell 2 is provided with two second stop holes 14. When the upper shell 1 is mounted on the lower shell 2, the first stop holes 13 are aligned with the second stop holes 14, so that bolts or screws pass through the stop holes 13 to fix the micro switch. The lower shell 2 is integrally formed with two stop rings 15, the axis of the stop ring 15 is the same as the axis of the second stop hole 14, and the stop ring 15 can extend into the first stop hole 13, so that the upper shell 1 and the lower shell 2 are fixed to each other.

[0041] Reference Figure 3 A placement groove 23 is provided on the surface of the lower shell 2, a through hole 231 communicating with the placement groove 23 is provided on the surface of the lower shell 2, a button 24 is slidably connected to the through hole 231, and one end of the button 24 extends out from the through hole 231. A sliding block 241 is integrally formed on the surface of the button 24, a sliding groove 232 for the sliding block 241 to slide is provided on the groove wall of the placement groove 23, and the sliding groove 232 extends along the penetrating direction of the through hole 231.

[0042] Reference Figure 4 The placement groove 23 is provided with a moving contact piece 3 and a stationary contact piece 4. The moving contact piece 3 is connected to one circuit, and the stationary contact piece 4 is connected to another circuit. When the moving contact piece 3 abuts against the stationary contact piece 4, the two circuits are connected. The moving contact piece 3 includes a first pin 31, an elastic member 32, a moving piece 33 and a moving contact point 34. The moving contact point 34 is fixedly connected to the moving piece 33. The moving piece 33 is rotatably connected to the first pin 31. The elastic member 32 is provided on the moving piece 33. The elastic member 32 is used to drive the moving piece 33 to move in a direction away from the stationary contact piece 4.

[0043] Reference Figure 5The first pin 31 includes a first connection part 311, a second connection part 312, a third connection part 313 and a fourth connection part 314. The second connection part 312 is located between the first connection part 311 and the third connection part 313, and the third connection part 313 is located between the second connection part 312 and the fourth connection part 314. The first connection part 311 is perpendicular to the second connection part 312, the third connection part 313 is perpendicular to the second connection part 312, and the first connection part 311 and the third connection part 313 are parallel to each other. The fourth connection part 314 is bent and formed on the third connection part 313, and the fourth connection part 314 can be connected to the circuit.

[0044] Reference Figure 4 and Figure 5 A first jack 25 connected to the placement slot 23 is provided on the surface of the lower shell 2. When the first pin 31 is installed in the placement slot 23, the third connection part 313 is located in the first jack 25, and the fourth connection part 314 is located outside the lower shell 2, so that the staff can connect the circuit with the fourth connection part 314.

[0045] Reference Figure 6 A support bar 26 is integrally formed on the groove wall of the placement groove 23. When the first pin 31 is installed in the placement groove 23, the support bar 26 abuts against the surface of the second connection part 312 away from the first connection part 311. A support surface 261 is provided between the surface of the support bar 26 away from the bottom wall of the placement groove 23 and the surface of the support bar 26 facing the through hole 231. The second connection part 312 can abut against the support bar 26 through the support surface 261, so that the staff can install the second connection part 312 easily.

[0046] Reference Figure 7 Two rotation grooves 315 are provided on the surface of the first connection part 311, and the rotation grooves 315 are for the movable piece 33 to be inserted. Two stop bars 331 are integrally formed on the movable piece 33, one of which is located on one side of the first connection part 311, and the other is located on the other side of the first connection part 311, and both of the two stop bars 331 abut against the first connection part 311, and the two stop bars 331 are used to limit the movable piece 33 from swinging in the left and right directions. Taking the perspective in this figure as an example, the left and right directions are left and right.

[0047] Reference Figure 5 The elastic member 32 includes an elastic spring 321 and a mounting plate 322. A through hole 318 is formed on the surface of the second connecting portion 312 for the elastic spring 321 to pass through. The mounting plate 322 is integrally formed on the hole wall of the through hole 318. A first mounting hole 316 is formed on the surface of the mounting plate 322, a second mounting hole 332 is formed on the surface of the moving piece 33, and a third mounting hole 317 is formed on the first connecting portion 311.

[0048] Reference Figure 4 and Figure 5 , a first hook 323 is integrally formed at one end of the elastic spring 321, and a second hook 324 is integrally formed at the other end of the elastic spring 321. The first hook 323 passes through the first mounting hole 316 and is fixed to the mounting plate 322, an end of the elastic spring 321 close to the second hook 324 passes through the third mounting hole 317, and the second hook 324 passes through the second mounting hole 332 and is fixed to the moving piece 33. The elastic spring 321 is in the sliding path of the button 24, that is, the button 24 can drive the elastic spring 321 to move, so that the elastic spring 321 drives the moving piece 33 to move toward the direction of the stationary contact piece 4.

[0049] Reference Figure 4 and Figure 5 The static contact piece 4 includes a second pin 41, a static piece 42 and a static contact point 43. The static contact point 43 is fixedly connected to the static piece 42, and the second pin 41 is integrally formed on the static piece 42. A second plug hole 27 connected to the placement groove 23 is provided on the surface of the lower shell 2. The second pin 41 can pass through the second plug hole 27 and extend out of the lower shell 2, so that the staff can connect the circuit with the second pin 41.

[0050] Reference Figure 4 When the button 24 is pressed, the button 24 drives the elastic spring 321 to move, causing the elastic spring 321 to deform, and the elastic spring 321 drives the moving contact piece 3 to move toward the static contact piece 4 until the moving contact piece 3 abuts against the static contact piece 4, thereby achieving circuit connection. When the button 24 is not pressed, the elastic spring 321 is reset, and the elastic spring 321 drives the moving contact piece 3 to move away from the static contact piece 4.

[0051] Reference Figure 6 A fixing block 28 is integrally formed on the groove wall of the placement groove 23, and a fixing surface 281 is provided between the surface of the fixing block 28 away from the bottom wall of the placement groove 23 and the surface of the fixing block 28 facing the through hole 231. The second connection portion 312 can abut against the fixing block 28 through the fixing surface 281, so that the staff can install the second connection portion 312 and limit the first pin 31 from moving toward the second pin 41.

[0052] Reference Figure 6 and Figure 8 A fixing block 28 is integrally formed on the surface of the upper shell 1. When the first pin 31 and the second pin 41 are installed on the lower shell 2 and the upper shell 1 is installed on the lower shell 2, the fixing block 28 abuts against the surface of the first pin 31 facing the second pin 41, and the fixing block 28 abuts against the surface of the second pin 41 facing the first pin 31, so as to limit the first pin 31 and the second pin 41 from abutting against each other.

[0053] Reference Figure 6 and Figure 8A fixing plate 29 is integrally formed on the surface of the fixing block 28, and the two fixing plates 29 are located between the second connecting portion 312 and the second pin 41, wherein one fixing plate 29 is close to the first pin 31, and the other fixing plate 29 is close to the second pin 41. The fixing plate 29 increases the creepage distance between the first pin 31 and the second pin 41, so that the upper shell 1 and the lower shell 2 can be made of insulating materials with general high-voltage resistance performance and can meet the insulation requirements, thereby reducing the manufacturing cost of the product.

[0054] The implementation principle of a micro switch in an embodiment of the present application is: when the button 24 is pressed, the button 24 drives the elastic spring 321 to move, allowing the elastic spring 321 to drive the moving plate 33 to rotate until the moving contact 34 abuts against the static contact 43, thereby realizing the connection between the two circuits.

[0055] When the button 24 is not pressed, the elastic spring 321 is reset, and the elastic spring 321 drives the movable plate 33 to rotate, so that the movable contact 34 does not abut against the static contact 43, thereby disconnecting the two circuits.

[0056] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0057] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present application should be included in the protection scope of the present application.

Claims

1. A micro switch, comprising an upper shell (1) and a lower shell (2), wherein a moving contact piece (3) and a stationary contact piece (4) are arranged in the lower shell (2), a button (24) for driving the moving contact piece (3) to abut against the stationary contact piece (4) is slidably connected to the lower shell (2), the moving contact piece (3) comprising an elastic member (32) and a moving piece (33), the elastic member (32) driving the moving piece (33) and the stationary contact piece (4) to separate, characterized in that: The upper shell (1) and the lower shell (2) are both provided with a fixing plate (29), and the fixing plate (29) is located between the moving contact piece (3) and the stationary contact piece (4); The elastic member (32) comprises an elastic spring (321) and a mounting plate (322), wherein the mounting plate (322) is arranged on the lower shell (2), the elastic spring (321) is rotatably connected to the mounting plate (322), the movable plate (33) is rotatably connected to the elastic spring (321), and the elastic spring (321) is located on the sliding path of the button (24); The movable contact piece (3) further comprises a first pin (31), the movable piece (33) being rotatably connected to the first pin (31), the first pin (31) being provided with a through hole (318) for an elastic spring (321) to pass through, and when the movable piece (33) abuts against the stationary contact piece (4), the elastic spring (321) is located at the through hole (318); The movable plate (33) is provided with two baffles (331), the two baffles (331) are respectively located on different sides of the movable plate (33), and the baffles (331) abut against the movable plate (33); The lower shell (2) is provided with a fixing block (28), the fixing block (28) being located on a side of the first pin (31) facing the stationary contact piece (4), and when the first pin (31) is installed on the lower shell (2), the first pin (31) abuts against the fixing block (28); A fixing block (28) is integrally formed on the surface of the upper shell (1); when the first pin (31) and the second pin (41) are mounted on the lower shell (2), and the upper shell (1) is mounted on the lower shell (2), the fixing block (28) abuts against the surface of the first pin (31) facing the second pin (41), and the fixing block (28) abuts against the surface of the second pin (41) facing the first pin (31), so as to limit the first pin (31) and the second pin (41) from abutting against each other.

2. A micro switch according to claim 1, characterized in that: The first pin (31) is provided with a rotation groove (315) for the movable piece (33) to be inserted.

3. A micro switch according to claim 1, characterized in that: The lower shell (2) is provided with a support bar (26), and when the first pin (31) abuts against the support bar (26), the first pin (31) abuts against the fixing block (28).

4. A micro switch according to claim 3, characterized in that: A supporting surface (261) is provided between a surface of the supporting strip (26) facing the upper shell (1) and a surface of the supporting strip (26) facing the first pin (31).

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