Microswitch moving contact group capable of effectively avoiding arc discharge and microswitch

Abstract

The utility model relates to a microswitch moving contact group capable of effectively avoiding arc discharge, which uses a support sheet and a seesaw to form a static terminal, and uses a button and a crimping sheet to simultaneously press a tension spring and the seesaw to drive a moving contact and a static contact to synchronously move in opposite directions, thereby greatly improving the relative approaching speed of the moving contact and the static contact, and improving the safety of the moving contact and the static contact. Therefore, the arc discharge phenomenon between the moving contact and the static contact can be effectively avoided, and the moving contact and the static contact are ensured to keep a good contact conduction effect for a long time.

Description

Technical Field

[0001] The utility model belongs to the technical field of switches, and particularly relates to a micro switch movable contact group and a micro switch which can effectively avoid arcing. Background Art

[0002] A microswitch is a small switch with a simple internal moving contact structure and a short moving contact stroke. Due to the small moving contact stroke, the distance between the moving contact and the stationary contact is small. As the moving contact descends and approaches the stationary contact, arcing is easily generated, causing carbon accumulation on the surfaces of the moving and stationary contacts, affecting their contact and flow. Since conventional microswitches only move the moving contact, it is difficult to significantly increase the speed at which the moving contact moves toward the stationary contact, making it difficult to overcome the arcing phenomenon. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a micro switch moving contact group which can effectively avoid arcing, and solve the technical problem that arcing is easily generated during the movement of the moving contact to the static contact.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a micro switch moving contact group that can effectively avoid arcing, including a static terminal, a dynamic terminal and a spring, the spring is abutted on the dynamic terminal through a tension spring, the spring extends to the outside of the dynamic terminal and is connected to the dynamic contact, the static terminal is arranged below the spring and is connected to the static contact, the dynamic contact and the static contact are directly opposite each other, one end of the tension spring is connected to the dynamic terminal, and the other end is connected to the spring, pressing the tension spring can drive the tension spring to swing, the swing of the tension spring drives the free end of the spring to swing, and the spring drives the moving contact to move straight toward the static contact. To abut against each other, the static terminal includes a supporting piece arranged perpendicular to the spring and a seesaw vertically clamped on the top of the supporting piece, the seesaw is arranged parallel to the bottom of the spring, one end of the seesaw extends to the bottom of the tension spring to form a pressing end, and the other end extends to the bottom of the moving contact and is connected to the static contact. A button is provided above the tension spring, and the button is connected to an insulating crimping piece extending downward from one side of the tension spring to the pressing end of the seesaw. The lower end of the crimping piece is directly opposite to the pressing end of the seesaw. When the button presses the tension spring to cause the moving contact to drop, the lower end of the crimping piece presses the pressing end of the seesaw to cause the static contact to rise.

[0005] As a preferred solution, the movable terminal includes a positioning piece and a connecting piece vertically connected to the upper part of the positioning piece, the end of the connecting piece away from the positioning piece is bent upward to form a blocking piece, the blocking piece is parallel to the positioning piece, one end of the spring is in contact with the side of the blocking piece facing away from the positioning piece, a groove is provided at the top of the blocking piece, the tension spring is arranged in the groove, one end of the tension spring is connected to the top of the positioning piece, and the other end is connected to the spring piece, the positioning piece and the support piece are both fixedly connected to a base.

[0006] As a preferred solution, a spring is provided on the bottom surface of the pressing end, the lower end of the spring abuts against the base, and the elastic force of the spring drives the pressing end to abut against the bottom end of the pressing piece of the button.

[0007] The technical problem to be further solved by the present invention is to provide a micro switch which can effectively avoid arcing, and solve the technical problem that arcing is easily generated between the moving contact and the static contact of the traditional micro switch.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: a micro switch that can effectively avoid arcing, including a shell, the shell is provided with the above micro switch moving contact group, and the button is movably plugged into the shell.

[0009] The beneficial effect of the present invention is that the present invention utilizes a supporting plate and a seesaw to form a static terminal, and utilizes a button and a crimping plate to simultaneously press the tension spring and the seesaw to drive the moving contact and the static contact to move toward each other synchronously, thereby greatly improving the relative speed at which the moving contact and the static contact approach each other, thereby effectively avoiding arcing between the moving contact and the static contact, and ensuring that the moving contact and the static contact maintain good contact and conduction effect for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0011] Figure 1 This is a structural diagram of the micro switch moving contact group of the utility model;

[0012] Figure 2 It is a schematic diagram of the connection structure between the movable terminal and the spring;

[0013] Figure 3 This is a schematic structural diagram of the micro switch of the present invention;

[0014] Figures 1 to 3 Middle: 1. Static terminal; 101. Support plate; 102. Rocker; 102a. Pressing terminal; 2. Moving terminal; 201. Positioning plate; 202. Connecting plate; 203. Blocking plate; 3. Spring; 4. Tension spring; 5. Moving contact; 6. Static contact; 7. Button; 8. Crimping plate; 9. Groove; 10. Base; 11. Spring; 12. Housing; 100. Moving contact group of micro switch. DETAILED DESCRIPTION

[0015] The specific implementation scheme of the present utility model is described in detail below with reference to the accompanying drawings. Example 1

[0016] like Figure 1 and Figure 2The micro switch moving contact group shown can effectively avoid arcing, including a static terminal 1, a dynamic terminal 2 and a spring 3, the spring 3 abuts on the dynamic terminal 2 through a tension spring 4, the spring 3 extends to the outside of the dynamic terminal 2 and is connected to a dynamic contact 5, the static terminal 1 is arranged below the spring 3 and is connected to a static contact 6, the dynamic contact 5 and the static contact 6 are directly opposite each other, one end of the tension spring 4 is connected to the dynamic terminal 2, and the other end is connected to the spring 3, pressing the tension spring 4 can drive the tension spring 4 to swing, the swing of the tension spring 4 drives the free end of the spring 3 to swing, and the spring 3 drives the moving contact 5 to move toward the static contact 6 until they abut each other, the static terminal 1 includes a support sheet 1 arranged perpendicular to the spring 3. 01 and a seesaw 102 vertically clamped on the top of the support piece 101, the seesaw 102 is arranged parallel to the bottom of the spring 3, one end of the seesaw 102 extends to the bottom of the tension spring 4 to form a pressing end 102a, and the other end extends to the bottom of the moving contact 5 and is connected to the static contact 6, a button 7 is provided above the tension spring 4, and the button 7 is connected to an insulating crimping piece 8 extending downward from one side of the tension spring 4 to the pressing end 102a of the seesaw 102, and the lower end of the crimping piece 8 is directly opposite to the pressing end 102a of the seesaw 102. When the button 7 presses the tension spring 4 to cause the moving contact 5 to descend, the lower end of the crimping piece 8 presses the pressing end 102a of the seesaw 102 to cause the static contact 6 to rise.

[0017] The utility model utilizes a support sheet 101 and a seesaw 102 to form a static terminal 1, and utilizes a button 7 and a crimping sheet 8 to simultaneously press the tension spring 4 and the seesaw 102 to drive the moving contact 5 and the static contact 6 to move toward each other synchronously, thereby greatly improving the relative speed at which the moving contact 5 and the static contact 6 approach each other, thereby effectively avoiding arcing between the moving contact 5 and the static contact 6, and ensuring that the moving contact 5 and the static contact 6 maintain good contact and conduction effect for a long time.

[0018] like Figure 2 As shown, the movable terminal 2 in this embodiment includes a positioning piece 201 and a connecting piece 202 vertically connected to the upper part of the positioning piece 201. The end of the connecting piece 202 away from the positioning piece 201 is bent upward to form a blocking piece 203. The blocking piece 203 is parallel to the positioning piece 201. One end of the spring 3 abuts against the side of the blocking piece 203 facing away from the positioning piece 201. A groove 9 is provided at the top of the blocking piece 203. The tension spring 4 is arranged in the groove 9. One end of the tension spring 4 is connected to the top of the positioning piece 201, and the other end is connected to the spring 3. The positioning piece 201 and the support piece 101 are both fixedly connected to a base 10.

[0019] The connection structure between the movable terminal 2 and the spring 3 is stable, and the tension spring 4 is easy to install.

[0020] A spring 11 is provided on the bottom surface of the pressing end 102a, the lower end of which abuts against the base 10. The elastic force of the spring 11 drives the pressing end 102a into contact with the bottom end of the crimping piece 8 of the button 7. This makes the entire micro switch movable contact assembly compact and free of looseness, and the travel of the movable contact 5 and the stationary contact 6 is stable, providing a better user experience. Example 2

[0021] like Figure 3 The micro switch shown can effectively avoid arcing, including a shell 12, in which the micro switch moving contact group 100 described in the above embodiment 1 is arranged, the button 7 is movably plugged into the shell 12, and the shell 12 is fixedly buckled on the base 10.

[0022] In this embodiment, the micro switch moving contact group 100 described in embodiment 1 is arranged in the housing 12. The micro switch moving contact group 100 can avoid arcing between the moving contact 5 and the static contact 6, thereby extending the service life of the micro switch and improving the sensitivity of the micro switch.

[0023] The working process of this utility model is: Figure 1 As shown, when the user presses the button 7, the button 7 and the crimping piece 8 will move downward synchronously, pressing the tension spring 4 and the pressing end 102a of the rocker 102 at the same time. After being pressed, the tension spring 4 swings, and the spring piece 3 connected to the tension spring 4 swings downward, driving the moving contact 5 to move downward. At the same time, the pressing end 102a of the rocker 102 is pressed and moves downward, forming a lever effect under the support of the support piece 101, so that the static contact 6 at the other end of the rocker 102 moves upward quickly, thereby forming the moving contact 5 and the static contact 6 moving toward each other at the same time, effectively increasing the relative speed at which the moving contact 5 and the static contact 6 approach each other. The faster the approach speed of the two, the better the effect of eliminating arcing. Therefore, compared with conventional technologies, the utility model can effectively avoid the technical problem of arcing between the moving contact 5 and the static contact 6.

[0024] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some embodiments of its application, and are not intended to limit the present invention. It should be noted that a person skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A micro switch moving contact group that can effectively avoid arcing, comprising a static terminal (1), a moving terminal (2) and a spring (3), wherein the spring (3) abuts against the moving terminal (2) through a tension spring (4), the spring (3) extends to the outside of the moving terminal (2) and is connected to a moving contact (5), the static terminal (1) is arranged below the spring (3) and is connected to a static contact (6), the moving contact (5) and the static contact (6) are vertically opposite, one end of the tension spring (4) is connected to the moving terminal (2), and the other end is connected to the spring (3), pressing the tension spring (4) can drive the tension spring (4) to swing, the swing of the tension spring (4) drives the free end of the spring (3) to swing, and the spring (3) drives the moving contact (5) to move toward the static contact (6) until they abut each other, characterized in that The static terminal (1) comprises a support sheet (101) arranged perpendicular to the spring (3) and a seesaw (102) vertically clamped on the top of the support sheet (101). The seesaw (102) is arranged parallel to the bottom of the spring (3). One end of the seesaw (102) extends to the bottom of the tension spring (4) to form a pressing end (102a), and the other end extends to the bottom of the moving contact (5) and is connected to the static contact (6). A pressing end (102a) is provided above the tension spring (4). The button (7) is connected to an insulating crimping piece (8) extending downward from one side of the tension spring (4) to the pressing end (102a) of the seesaw (102), and the lower end of the crimping piece (8) is vertically opposite to the pressing end (102a) of the seesaw (102). When the button (7) presses the tension spring (4) to lower the moving contact (5), the lower end of the crimping piece (8) presses the pressing end (102a) of the seesaw (102) to raise the static contact (6).

2. The micro switch movable contact assembly capable of effectively avoiding arcing according to claim 1, characterized in that: The movable terminal (2) comprises a positioning piece (201) and a connecting piece (202) vertically connected to the upper part of the positioning piece (201); one end of the connecting piece (202) away from the positioning piece (201) is bent upward to form a blocking piece (203); the blocking piece (203) is parallel to the positioning piece (201); one end of the spring (3) abuts against the side of the blocking piece (203) facing away from the positioning piece (201); a groove (9) is provided at the top of the blocking piece (203); the tension spring (4) is arranged in the groove (9); one end of the tension spring (4) is connected to the top of the positioning piece (201), and the other end is connected to the spring (3); the positioning piece (201) and the supporting piece (101) are both fixedly connected to a base (10).

3. The micro switch movable contact assembly capable of effectively avoiding arcing according to claim 2, characterized in that: A spring (11) is provided on the bottom surface of the pressing end (102a), and the lower end of the spring (11) abuts against the base (10). The elastic force of the spring (11) drives the pressing end (102a) to abut against the bottom end of the crimping piece (8) of the button (7).

4. A micro switch capable of effectively avoiding arcing, comprising a housing (12), characterized in that: The micro switch moving contact group (100) according to any one of claims 1 to 3 is arranged in the housing (12), and the button (7) is movably plugged into the housing (12).

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