A micro switch

Abstract

The present invention discloses a micro switch, comprising a main body shell, wherein a connecting piece is rotatably installed inside the main body shell through a pin shaft, a spring piece and a first guide piece are provided inside the main body shell below one end of the connecting piece, the first guide piece is connected to the connecting piece, a second guide piece is provided inside the main body shell below the other end of the spring piece, and one end of the connecting piece can be contacted and connected with the second guide piece under the pushing elastic force of the spring piece; a lower button is provided inside the main body shell above one end of the connecting piece, the top of the lower button extends to the outside of the main body shell and is sleeved with an upper button, and the outside of the upper button is sleeved with an external spring. The present invention is suitable for switches, and the micro switch has a fast response speed, high sensitivity, and is disconnected in place, thereby making the micro switch highly safe.

Description

Technical Field

[0001] The invention belongs to the technical field of micro switches, in particular to a micro switch. Background Art

[0002] A micro switch is a switch with a small contact spacing and a snap-action mechanism. It uses a specified stroke and a specified force to perform a switching action. It is covered by a shell and has a driving rod on the outside. Because the contact spacing of the switch is relatively small, it is called a micro switch, also known as a sensitive switch. The electrical symbol is SM. It is widely used in electronic equipment, instruments and meters, mining, power systems, household appliances, electrical equipment, as well as military fields such as aerospace, aviation, ships, missiles, and tanks.

[0003] The common drawback of micro-switch switches currently on the market is that after pressing the button, the connection and disconnection speed is very slow, and sometimes the connection or disconnection is not in place, so there are certain safety hazards. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a micro switch.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A micro switch includes a main body shell, a connecting piece is rotatably mounted inside the main body shell via a pin, a spring piece and a first guide piece are provided inside the main body shell below one end of the connecting piece, the first guide piece is connected to the connecting piece, and a second guide piece is provided inside the main body shell below the other end of the spring piece, one end of the connecting piece can be in contact and connected with the second guide piece under the pushing elastic force of the spring piece;

[0007] A lower button is provided inside the main shell above one end of the connecting piece. The top of the lower button extends to the outside of the main shell and is sleeved with an upper button. The outside of the upper button is sleeved with an outer spring.

[0008] Preferably, a first contact piece is provided below one end of the connecting piece close to the second guide piece, and a second contact piece is provided above one end of the second guide piece, and the first contact piece is in contact and connected with the second contact piece.

[0009] Preferably, the upper center of the lower button is hollowed out, an inner spring is installed in the hollow hole on the lower button, and the top of the inner spring is fixed to the top of the upper button through a boss.

[0010] Preferably, an inverted "T"-shaped structure is adopted at the bottom of the lower button, a limiting step is provided on the outer side of the vertical end of the lower button, a recess is provided on one side of the limiting step, a mounting hole is provided inside the main shell at one side of the limiting step, a push spring is provided inside the mounting hole, a steel ball is provided inside the mounting hole at one end of the push spring, and one side of the steel ball is embedded in the recess under the push of the push spring.

[0011] Preferably, the diameter of the steel ball is 2 mm, and the steel ball, the inner spring, the outer spring and the push spring are all made of stainless steel.

[0012] Preferably, the spring piece adopts an L-shaped structure.

[0013] Preferably, a corner block is provided at the edge of the top position of the lower button, and a groove adapted to the corner block is opened on the inner wall of the upper button, and the corner block is engaged in the groove.

[0014] In the present invention, the top of the lower button extends to the outside of the main body shell and is sleeved with the upper button. The outer spring is sleeved on the outer part of the upper button. The upper center of the lower button is hollowed out, and the inner spring is installed in the hollow hole of the lower button. This double button (upper button and lower button) and double spring structure (outer spring and inner spring) can increase the sensitivity of the upper button when pressed, thereby making the micro switch more responsive.

[0015] In the present invention, an inverted "T"-shaped structure is adopted at the bottom of the lower button, a limit step is provided on the outer side of the vertical end of the lower button, a notch is provided on one side of the limit step, a mounting hole is provided inside the main shell at one side of the limit step, a push spring is provided inside the mounting hole, a steel ball is provided inside the mounting hole at one end of the push spring, and one side of the steel ball is embedded in the notch under the push of the push spring. Such a structural arrangement makes it possible that when the upper button is pressed, the outer spring and the inner spring will first be compressed and contracted, and when the inner spring transmits the pressure to the lower button, the side of the lower button is subjected to the pushing pressure of the steel ball, so that the lower button will not move downward at first. When the pressure applied by the inner spring and the outer spring on the lower button is sufficient to cause the steel ball to pop out of the notch, that is, when it is greater than the pushing pressure applied by the push spring on the steel ball, the lower button will quickly move downward to press one end of the connecting piece, thereby quickly separating the first contact piece on the connecting piece and the second contact piece on the second guide piece. The speed is fast, the sensitivity is high, and the disconnection is in place, thereby improving the safety of the micro switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This invention Figure 1Schematic diagram of the enlarged structure of area A in the middle;

[0018] Figure 3 This invention Figure 1 Schematic diagram of the enlarged structure of area B in the middle.

[0019] Figure numerals: 1. outer spring; 2. lower button; 3. connecting piece; 31. first contact piece; 4. main body shell; 5. spring piece; 6. first guide piece; 7. second guide piece; 71. second contact piece; 8. mounting hole; 9. upper button; 10. boss; 11. inner spring; 12. corner block; 13. notch; 14. limit step; 15. steel ball; 16. push spring. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-3 , further illustrating a specific embodiment of a micro switch of the present invention. The micro switch of the present invention is not limited to the description of the following embodiments.

[0021] Example 1:

[0022] This embodiment provides a specific structure of a micro switch, such as Figure 1-3 As shown, it includes a main body shell 4, a connecting piece 3 is rotatably installed inside the main body shell 4 through a pin shaft, a spring piece 5 and a first guide piece 6 are provided inside the main body shell 4 below one end of the connecting piece 3, and the first guide piece 6 is connected to the connecting piece 3. A second guide piece 7 is provided inside the main body shell 4 below the other end of the spring piece 5, and one end of the connecting piece 3 can be in contact and connected with the second guide piece 7 under the pushing elastic force of the spring piece 5;

[0023] A lower button 2 is provided inside the main shell 4 above one end of the connecting piece 3. The top of the lower button 2 extends to the outside of the main shell 4 and is sleeved with an upper button 9. The outside of the upper button 9 is sleeved with an outer spring 1.

[0024] A first contact piece 31 is provided below one end of the connecting piece 3 close to the second guide piece 7 , and a second contact piece 71 is provided above one end of the second guide piece 7 . The first contact piece 31 is in contact with and connected to the second contact piece 71 .

[0025] By adopting the above technical solutions:

[0026] The micro switch is in a normal state, that is, when the upper button 9 and the lower button 2 are not pressed, the connecting piece 3 is tilted at one end close to the lower button 2 under the action of the elastic force of the spring 5 itself, and the other end is located below, that is, the first contact piece 31 on the connecting piece 3 is in contact with the second contact piece 71 on the second guide piece 7, and the micro switch is in a connected state. When the upper button 9 is pressed, the outer spring 1 is compressed and contracted, and the lower button 2 moves downward. When the top of the lower button 2 hits one end of the connecting piece 3, the other end of the connecting piece 3 tilts up, that is, the first contact piece 31 on the connecting piece 3 is separated from the second contact piece 71 on the second guide piece 7, and the micro switch is disconnected.

[0027] Example 2:

[0028] This embodiment provides a specific structure of a micro switch, such as Figure 1-3 As shown, it includes a main body shell 4, a connecting piece 3 is rotatably installed inside the main body shell 4 through a pin shaft, a spring piece 5 and a first guide piece 6 are provided inside the main body shell 4 below one end of the connecting piece 3, and the first guide piece 6 is connected to the connecting piece 3. A second guide piece 7 is provided inside the main body shell 4 below the other end of the spring piece 5, and one end of the connecting piece 3 can be in contact and connected with the second guide piece 7 under the pushing elastic force of the spring piece 5;

[0029] A lower button 2 is provided inside the main shell 4 above one end of the connecting piece 3. The top of the lower button 2 extends to the outside of the main shell 4 and is sleeved with an upper button 9. The outside of the upper button 9 is sleeved with an outer spring 1.

[0030] A first contact piece 31 is provided below one end of the connecting piece 3 close to the second guide piece 7 , and a second contact piece 71 is provided above one end of the second guide piece 7 . The first contact piece 31 is in contact with and connected to the second contact piece 71 .

[0031] The upper center of the lower button 2 is hollowed out, and an inner spring 11 is installed in the hollow hole on the lower button 2. The top of the inner spring 11 is fixed to the top of the upper button 9 through a boss 10.

[0032] By adopting the above technical solutions:

[0033] Since the upper center of the lower button 2 is hollowed out, an inner spring 11 is installed in the hollow hole on the lower button 2. Such a double button (upper button 9 and lower button 2) and double spring structure (outer spring 1 and inner spring 11) can increase the sensitivity of the upper button 9 when pressed, thereby making the micro switch more responsive.

[0034] Example 3:

[0035] This embodiment provides a specific structure of a micro switch, such as Figure 1-3As shown, it includes a main body shell 4, a connecting piece 3 is rotatably installed inside the main body shell 4 through a pin shaft, a spring piece 5 and a first guide piece 6 are provided inside the main body shell 4 below one end of the connecting piece 3, and the first guide piece 6 is connected to the connecting piece 3. A second guide piece 7 is provided inside the main body shell 4 below the other end of the spring piece 5, and one end of the connecting piece 3 can be in contact and connected with the second guide piece 7 under the pushing elastic force of the spring piece 5;

[0036] A lower button 2 is provided inside the main shell 4 above one end of the connecting piece 3. The top of the lower button 2 extends to the outside of the main shell 4 and is sleeved with an upper button 9. The outside of the upper button 9 is sleeved with an outer spring 1.

[0037] A first contact piece 31 is provided below one end of the connecting piece 3 close to the second guide piece 7 , and a second contact piece 71 is provided above one end of the second guide piece 7 . The first contact piece 31 is in contact with and connected to the second contact piece 71 .

[0038] An inverted "T"-shaped structure is adopted at the bottom of the lower button 2. A limiting step 14 is provided on the outer side of the vertical end of the lower button 2. A recess 13 is provided on one side of the limiting step 14. A mounting hole 8 is provided inside the main shell 4 on one side of the limiting step 14. A push spring 16 is provided inside the mounting hole 8. A steel ball 15 is provided inside the mounting hole 8 at one end of the push spring 16. One side of the steel ball 15 is embedded in the recess 13 under the push of the push spring 16.

[0039] The diameter of the steel ball 15 is 2 mm. The steel ball 15, the inner spring 11, the outer spring 1 and the push spring 16 are all made of stainless steel.

[0040] The spring piece 5 adopts an L-shaped structure.

[0041] A corner block 12 is provided at the edge of the top position of the lower button 2, and a groove adapted to the corner block 12 is opened on the inner wall of the upper button 9, and the corner block 12 is engaged in the groove.

[0042] By adopting the above technical solutions:

[0043] The bottom of the lower button 2 in the micro switch adopts an inverted "T" structure. A limit step 14 is provided on the outer side of the vertical end of the lower button 2, and a notch 13 is provided on one side of the limit step 14. A mounting hole 8 is provided inside the main shell 4 at one side of the limit step 14. A push spring 16 is provided inside the mounting hole 8. A steel ball 15 is provided at one end of the push spring 16 inside the mounting hole 8. One side of the steel ball 15 is embedded in the notch 13 under the push of the push spring 16. Such a structural arrangement makes it possible that when the upper button 9 is pressed, the outer spring 1 and the inner spring 11 will be compressed and contracted first. When the inner spring 11 transmits the pressure The lower button 2 is guided onto the lower button 2, and the side surface of the lower button 2 is subjected to the pressing force of the steel ball 15 (the pressing force of the steel ball 15 comes from the pushing spring 16). Therefore, the lower button 2 will not move downward at the beginning. However, when the pressure exerted by the inner spring 11 and the outer spring 1 on the lower button 2 is sufficient to make the steel ball 15 pop out of the recess 13, that is, when the pressure is greater than the pressing force exerted by the pushing spring 16 on the steel ball 15, the lower button 2 will quickly move downward to press one end of the connecting piece 3, thereby quickly separating the first contact 31 on the connecting piece 3 from the second contact 71 on the second guide piece 7. The speed is fast, the sensitivity is high, and the disconnection is in place, thereby improving the safety of the micro switch.

[0044] A corner block 12 is provided at the edge of the top position of the lower button 2, and a groove adapted to the corner block 12 is opened on the inner wall of the upper button 9. The corner block 12 is engaged in the groove to prevent the upper button 9 from bouncing off and separating from the lower button 2.

[0045] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A micro switch comprising a main housing (4), characterized in that: A connecting piece (3) is rotatably mounted inside the main shell (4) via a pin shaft, a spring piece (5) and a first guide piece (6) are provided inside the main shell (4) below one end of the connecting piece (3), the first guide piece (6) is connected to the connecting piece (3), and a second guide piece (7) is provided inside the main shell (4) below the other end of the spring piece (5), one end of the connecting piece (3) can be in contact and connected with the second guide piece (7) under the pushing elastic force of the spring piece (5); A lower button (2) is provided inside the main housing (4) above one end of the connecting piece (3); the top of the lower button (2) extends to the outside of the main housing (4) and is sleeved with an upper button (9); the outside of the upper button (9) is sleeved with an outer spring (1); The upper center of the lower button (2) is hollowed out, and an inner spring (11) is installed in the hollow hole of the lower button (2), and the top of the inner spring (11) is fixed to the top of the upper button (9) through a protruding column (10); The lower part of the lower button (2) adopts an inverted "T"-shaped structure, a limiting step (14) is provided on the outer side of the vertical end of the lower button (2), a notch (13) is provided on one side of the limiting step (14), a mounting hole (8) is provided inside the main body shell (4) at one side of the limiting step (14), a push spring (16) is provided inside the mounting hole (8), a steel ball (15) is provided inside the mounting hole (8) at one end of the push spring (16), and one side of the steel ball (15) is embedded in the notch (13) under the push of the push spring (16); The diameter of the steel ball (15) is 2 mm, and the steel ball (15), the inner spring (11), the outer spring (1) and the push spring (16) are all made of stainless steel; A first contact piece (31) is provided below one end of the connecting piece (3) close to the second guide piece (7), and a second contact piece (71) is provided above one end of the second guide piece (7). The first contact piece (31) is in contact and connection with the second contact piece (71).

2. A micro switch according to claim 1, characterized in that: The spring piece (5) adopts an L-shaped structure.

3. The micro switch according to claim 1, wherein: A corner block (12) is provided at the edge of the top position of the lower button (2), and a groove adapted to the corner block (12) is provided on the inner wall of the upper button (9), and the corner block (12) is engaged in the groove.

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