TWI830196B - Micro switch - Google Patents

Abstract

A micro switch includes a housing, a set of circuit boards connected to the housing and a switching component. The circuit board has a first side, a plurality of first printed circuits arranged on the first side, at least one first resistor provided on the first side and a touch structure on the first side. Two of the printed circuits extend outside the housing to serve as at least two first conductive pins. The first printed circuits, the first resistor and the touch structure cause the two first conductive pins to generate at least two first conductive pins. electrical signals. The switching component includes an elastic member and an operating member connected to the elastic member. When the operating member is displaced, it touches the touch structure and causes one of the two first electrical signals generated by the two first conductive pins. One changes to the other of the two first electrical signals.

Description

Micro switch

The present invention relates to a micro switch, in particular to a micro switch in which conductive pins are formed by printed lines on a circuit board.

With the evolution of science and technology, today's society has increasing requirements for switch control accuracy, so the development of switch devices has received increasing attention. In order to improve the signal discrimination, conventional switching devices often connect additional external resistors. However, the space provided for assembly of the switching device is limited. The implementation of adding an external resistor increases the assembly space required for the switching device, which is not conducive to installation. In addition, since conventional resistors are exposed outside the switching device, manufacturers need to add additional circuit boards for the resistor installation. At the same time, to ensure the operational stability of the resistor, they must additionally design the resistor or install other parts to protect the resistor.

In order to solve the aforementioned problems, most existing switching devices have resistors installed inside the device, as disclosed in JP 6413583B2 and other countries’ patents CN 105489429B, US 10256056B2 and EP 3002768B1, as well as JP 6188155 and other countries’ patents CN 204167164U. . The switch device disclosed in the previously published patent is implemented with a metal lead frame. The conductive pins of the switch device are formed through the metal lead frame. At the same time, the metal lead frame further forms at least two conductive paths with the resistor. When the switch device is operated, the operating member controls The movable contact conducts one of the two conductive paths, thereby changing the electrical signal output by the conductive pin. However, the conventional mechanism requires an additional metal lead frame when preparing the switch device, which results in cumbersome manufacturing steps. Moreover, the metal lead frame must be specially positioned during the assembly process, which is not conducive to assembly.

The main purpose of the present invention is to solve the problem that the conventional switch device uses a metal lead frame, which results in complicated manufacturing steps and is not conducive to assembly.

To achieve the above object, the present invention provides a micro switch, which includes a housing, a circuit board, and a switching component. The housing forms a space, and the circuit board is assembled with the housing. The circuit board has a first surface at least partially facing the space. A plurality of first printed circuits are arranged on the first surface, and at least one is provided on the first surface. The first resistor forms a conductive relationship with two of the first printed circuits on the first side, and a touch structure on the first side. Two of the first printed circuits extend outside the housing. As at least two first conductive pins of the micro switch, the first printed circuits, the first resistors and the triggering structure cause the two first conductive pins to generate at least two first electrical signals, and the two first Electrical signals have different resistance values. The switching component includes an elastic member located in the space, and an operating member connected to the elastic member and extending out of the housing for pressing. The operating member has a displacement stroke in the space. The operating member is located in the space. The touch structure is contacted during the displacement stroke, and one of the two first electrical signals generated by the two first conductive pins is changed to the other of the two first electrical signals.

In one embodiment, the triggering structure is at least one conductive elastic piece.

In one embodiment, the conductive elastic piece has a fixed end installed on the circuit board and electrically connected to one of the first printed circuits, and a free end opposite to the fixed end, and the free end is on the operating member During the displacement stroke, it is touched and comes into contact with another one of the first printed circuits.

In one embodiment, the touch structure is at least two conductive spring pieces, and the operating member touches at least one of the two conductive spring pieces before and after the displacement stroke.

In one embodiment, the circuit board has a second side opposite to the first side, a plurality of second printed circuits arranged on the second side, and at least one of the first printed circuits and the first printed circuit board. One of the second printed circuits is electrically connected to a conductive through hole, two of the second printed circuits extend outside the housing to serve as at least two second conductive pins of the micro switch, and the operating member moves during the displacement When the touch structure is touched during the stroke, the electrical signal generated by the two second conductive pins changes.

In one embodiment, the circuit board has at least one second resistor disposed on the second surface and electrically connected to two of the second printed circuits.

In one embodiment, the housing includes an outer cover forming the space and a base installed in the outer cover and providing the circuit board. The base divides the space into a first part and a second part. The third part is divided into a first part and a second part. One part provides the operating member with movement, and the first resistor is disposed in the second part.

In one embodiment, the base has a slot formed on a side of the base to provide the circuit board.

In one embodiment, the base has at least one protruding rib formed in the slot and cooperating with the slot to jointly restrict the circuit board.

In one embodiment, the outer cover has at least one stepped wall surrounding the space to limit the position of the base.

In one embodiment, the base has a positioning block located on the first part for positioning the elastic member.

Through the foregoing implementation of the present invention, compared with the conventional ones, the present invention has the following characteristics: the present invention uses a circuit board to form a conductive relationship with the first resistor and the touch structure through the first printed circuits provided on the circuit board, and at the same time utilizes The first printed circuits form the first conductive pins. The present invention no longer uses a metal lead frame to form pins, and there is no need to additionally set up a metal lead frame or position the metal lead frame during the preparation process of the micro switch, which is beneficial to improving production efficiency.

The detailed description and technical content of the present invention are described as follows with reference to the drawings:

Referring to Figures 1 to 8, the present invention provides a micro switch 100, which includes a housing 10, a circuit board 20 and a switching component 40. The housing 10 forms a space 11, and the circuit board 20 and the housing 10 In assembly, the circuit board 20 has a first surface 21 at least partially facing the space 11, a plurality of first printed circuits 22 arranged on the first surface 21, and at least one first resistor provided on the first surface 21. device 23, and a touch structure 24 on the first side 21. Specifically, the first side 21 refers to one of the sides of the circuit board 20 that provides printing, and the first printed circuits 22 are conductive patterns printed on the insulating substrate of the circuit board 20 . The printed circuit 22 is used to provide the circuit board 20 with a conductive function. In one embodiment, the first printed circuits 22 may be formed of copper foil. The first resistor 23 is connected to two of the first printed circuits 22 and can form a conductive relationship with the first printed circuits 22 . In one embodiment, the first resistor 23 can be inserted into the circuit board 20 using Through Hole Technology (THT) or Surface Mounted Technology (SMT). The touch structure 24 has a conductive function and can be electrically connected to the first printed circuits 22. The touch structure 24 changes its working state after being acted upon, thereby determining the connection with the first printed circuits 22 and the first resistor. 23 conductive relationship. In one embodiment, the triggering structure 24 is at least one conductive spring piece 241, and the working state of the triggering structure 24 described herein is that the conductive spring piece 241 is in contact with the first printed circuits 22, or is not in contact with the first printed circuits 22. The first printed circuit 22 is in contact and conductive.

Following the above, two of the first printed circuits 22 extend outside the housing 10 and serve as at least two first conductive pins 221 and 222 of the micro switch 100. The two first conductive pins 221 and 222 An external device (not shown in the figure) is provided for connection, so that the external device can be controlled according to the output of the two first conductive pins 221 and 222. The first printed circuits 22, the first resistor 23 and the touch structure 24 cause the two first conductive pins 221 and 222 to generate at least two first electrical signals. The two first electrical signals can be generated according to the first The conductive relationship between the printed circuit 22 , the first resistor 23 and the touch structure 24 produces different resistance values. It should be understood that the resistance value difference described herein refers to the resistance value difference measured at the two nodes of the electrical circuit formed by the first printed circuits 22 before and after the micro switch 100 is actuated. For example, the micro switch 100 can be provided with a plurality of first resistors 23, and the plurality of first resistors 23 produce different resistance values when they are turned on respectively. It can also be a plurality of first resistors 23 with different electrical resistances. The resistance difference generated by the loop, or the resistance value difference generated by a single first resistor 23 before and after it is turned on.

Following the above, the switching component 40 includes an elastic member 41 located in the space 11, and an operating member 42 connected to the elastic member 41. Part of the operating member 42 extends out of the housing 10 for pressing. The operating member 42 presses the elastic member 41 after being pressed, so that the elastic member 41 provides a restoring force for the operating member 42 when the operating member 42 is released from being pressed. In addition, the operating member 42 has a displacement stroke 421 in the space 11 after being pressed. The operating member 42 contacts the touch structure 24 during the displacement stroke 421 and causes the two first conductive pins 221 and 222 to generate One of the two first electrical signals is changed to the other of the two first electrical signals.

Continuing with the above, please refer to FIG. 3 to FIG. 7 , and the implementation of the micro switch 100 will be described later. For the convenience of explanation of the micro switch 100, it is assumed that the two first conductive pins 221 and 222 are respectively called COM pins and NC pins by those with ordinary knowledge in the field. The triggering structure 24 is a single conductive elastic piece 241. The number of one resistor 23 is two. In order to distinguish the two first resistors 23 in this article, the labels of the two first resistors 23 are distinguished as 231 and 232, and the resistance value of the first resistor 231 is R1. The resistance value of the first resistor 232 is R2. At the same time, it is assumed that the operating member 42 does not press the elastic member 41 initially, but contacts the triggering structure 24 . At this moment, the triggering structure 24 is pushed by the operating member 42 and contacts two of the first printed circuits 22, so that the first printed circuits 22 and the first resistor 232 on the circuit board 20 A conductive relationship is formed, so that the electrical signal output by the two first conductive pins 221 and 222 can be measured to have a resistance value R2. When the operating member 42 is pressed, the operating member 42 performs the displacement stroke 421 and presses the elastic member 41. The operating member 42 no longer pushes against the triggering structure 24 and contacts the first printed circuits 22, causing the triggering structure to 24 does not conduct the first printed circuits 22, so that the first printed circuits 22 on the circuit board 20 form a conductive relationship with the first resistor 231 and the first resistor 232, and the two first conductive connections The electrical signal output by pins 221 and 222 can be measured to have a resistance value of R1+R2. Furthermore, in another embodiment, please refer to FIG. 8 , the operating member 42 may not be in contact with the triggering structure 24 initially, so that the triggering structure 24 is not electrically connected to the first printed circuits 22 initially. , so that the electrical signal output by the two first conductive pins 221 and 222 can be measured to have a resistance value of R1 + R2. When the operating member 42 moves through the displacement stroke 421, it contacts the touch structure 24, so that the touch structure 24 is not initially connected to the first printed circuits 22, and the output of the two first conductive pins 221, 222 is The electrical signal can be measured with the resistance value R2. In this embodiment, the two first conductive pins 221 and 222 can be what those with ordinary knowledge in the field call COM pins and NO pins.

It can be seen from the above that the present invention is no longer implemented with a metal lead frame, but through the arrangement on the circuit board 20, the first printed circuits 22 provide a conductive function, thereby achieving the purpose of using the difference in resistance value to provide control identification. At the same time, compared with conventional ones, the present invention is easier to assemble, which is beneficial to improving the production efficiency of the micro switch 100 .

Following the above, in one embodiment, when the triggering structure 24 is implemented with the conductive elastic piece 241, the conductive elastic piece 241 has the ability to elastically deform. The conductive elastic piece 241 has a fixed end 242 installed on the circuit board 20, and A free end 243 opposite to the fixed end 242 . The fixed end 242 is in regular contact with one of the first printed circuits 22 . In one embodiment, a mounting hole 26 is formed on the circuit board 20 , and the conductive elastic piece 241 has at least one mounting hole located at the fixed end 242 . The arm 244 , when the fixed end 242 is installed on the circuit board 20 , the mounting arm 244 extends into the mounting hole 26 so that the fixed end 242 is electrically connected to one of the first printed circuits 22 . The free end 243 can contact the operating member 42 during the displacement stroke 421 of the operating member 42 , causing the free end 243 to deform and thereby displace relative to the circuit board 20 . For example, assuming that the free end 243 is initially in contact with another one of the first printed circuits 22 , from the side view of the circuit board 20 , the free end 243 is in contact with the first printed circuits 22 There is a distance between the other one and there is no conduction. The free end 243 is touched by the operating member 42 when the operating member 42 moves through the displacement stroke 421 , so that the free end 243 deforms and contacts another one of the first printed circuits 22 . In one embodiment of the present invention, the conductive spring piece 241 has at least one conductive bump 245 provided on the free end 243. The conductive bump 245 provides conduction between the free end 243 and the other one of the first printed circuits 22. , and provide the single-point contact function of the conductive shrapnel 241.

Continuing with the above, in another embodiment, please refer to FIGS. 9 to 14 , the triggering structure 24 is two conductive elastic pieces 241 , and the operating member 42 can touch the two conductive elastic pieces 241 at the same time during the displacement stroke 421 . The two conductive elastic pieces 241 may be touched respectively before and after the displacement stroke 421, as shown in Figure 23. Please refer to FIG. 15 and FIG. 23 again. For convenience of explanation, the two conductive elastic pieces 241 are distinguished by numbers 246 and 247, and the two free ends 243 of the two conductive elastic pieces 241 are distinguished by numbers 248 and 249 respectively. When the operating member 42 touches the two conductive elastic pieces 241 at the same time, it means that the free end 248 and the free end 249 are arranged facing each other, that is, the two free ends 248 and 249 can be at the same level of the circuit board 20. The operating member 42 may contact the two free ends 248 and 249 initially, or may contact the two free ends 248 and 249 after completing the displacement stroke 421 . When the operating member 42 touches the two conductive elastic pieces 246 and 247 respectively before and after the displacement, it means that the two free ends 248 and 249 are not at the same level of the circuit board 20 and the free end 248 is not facing each other. The free end 249 is as shown in Figure 23.

On the other hand, in the present invention, the number of the first conductive pins 221 and 222 is at least three. When the number of the first conductive pins 221 and 222 is three, this article refers to the first conductive pins 221 and 222 as The numbers of the pins 221 and 222 are respectively 221, 222 and 223, as shown in Figure 23, and the first conductive pins 221, 222 and 223 can be respectively known as COM pins, NO feet and NC feet. In another embodiment, the circuit board 20 of the present invention can be regarded as a unit of the micro switch 100. When the micro switch 100 is spliced into multiple units based on needs, the micro switch 100 is configured with each circuit board 20. The first conductive pins 221 and 222 serve as a pin group and have multiple pin groups. In this embodiment, the plurality of circuit boards 20 will cause the number of the first conductive pins 221 and 222 to be 4, 5, 6... and so on. . In addition, the number of the first resistors 23 of the present invention is not limited to that shown in Figures 1 to 18. The number of the first resistors 23 is not limited to one or two, but can be three according to needs. , four, five...and many more, as shown in Figure 26 to Figure 28.

In addition to the above, please refer to Figures 12, 13 and 19 to 21. In one embodiment, the circuit board 20 has a second side 27 opposite to the first side 21, and a plurality of circuit boards are arranged on the second side. The second printed circuit 28 on 27, and at least one conductive through hole 29. Specifically, the second side 27 refers to the other side of the circuit board 20 that provides printing, and is located on the other side of the circuit board 20 that does not face the space 11 . The second printed circuits 28 are partially located in the housing 10 , and the second printed circuits 28 are used to provide the conductive function of the circuit board 20 on the second surface 27 . In one embodiment, the second printed circuits 28 may be formed of copper foil. The conductive through hole 29 penetrates the circuit board 20 , and the conductive through hole 29 electrically connects one of the first printed circuits 22 and one of the second printed circuits 28 . In one embodiment, please refer to FIG. 17 , the conductive through hole 29 is connected to the touch structure 24 at the port (shown as 291 ) on the side of the first surface 21 . When the touch structure 24 is turned on, the touch structure 24 is connected to the touch structure 24 . One of the second printed circuits 28 can be electrically connected to the first printed circuits 22 through the conductive through hole 29 .

Following the above, two of the second printed circuits 28 extend outside the housing 10 to serve as at least two second conductive pins 281 and 282 of the micro switch 100. It should be understood that in this embodiment, the second The number of conductive pins 281 and 282 is also not limited to two. If the width of the circuit board 20 allows, the number of the second conductive pins 281 and 282 can be three, four, five, etc. according to the demand. Multiple. In addition, the two second conductive pins 281 and 282 can provide another external device assembly, so that the micro switch 100 can realize the control function of the first printed circuits 22 and the second printed circuits 28 respectively. The micro switch 100 of the present invention can improve the conventional metal lead frame which can only provide a single circuit in a single conduction process and cannot break through the shortcomings of single-pole single-throw technology.

In addition, in this embodiment, the two second conductive pins 281 and 282 can generate differences in electrical signals according to the conduction status of the second printed circuits 28. Take the structures depicted in Figures 15 to 21 as an example. , assuming that when the triggering structure 24 is connected to one of the first printed circuits 22, the first printed circuits 22 are connected to the second printed circuits 28, and it is also assumed that the operating member 42 does not cause the triggering at the beginning. The structure 24 conducts the ones of the first printed circuits 22 that are electrically connected to the second printed circuits 28 . At this moment, those of the second printed circuits 28 that are electrically connected to the first printed circuits 22 cannot receive power, so that there is no power flow between the second printed circuits 28 , causing the two second conductive circuits 28 to be electrically connected. There is an open circuit between pins 281 and 282. When the operating member 42 is operated, the triggering structure 24 conducts the ones of the first printed circuits 22 that are electrically connected to the second printed circuits 28, allowing electric power to flow between the second printed circuits 28, so that The two second conductive pins 281 and 282 are electrically connected. In another example, the operating member 42 can also make the first printed circuits 22 and the second printed circuits 28 conductive at the beginning, and after being operated, the operating member 42 can make the first printed circuits 22 and the third printed circuits 28 conductive. The second printed circuit 28 is not conductive, and its detailed implementation will not be described here.

Furthermore, in another embodiment, when the touch structure 24 is at least two conductive elastic pieces 241, one of the two conductive elastic pieces 241 is disposed at the port of the conductive through hole 29 on one side of the first surface 21. (as shown by reference numeral 291), and the other of the two conductive spring pieces 241 is disposed in the mounting hole 26. When the two conductive elastic pieces 241 disposed in the conductive through holes 29 are connected, the first printed circuits 22 and the second printed circuits 28 are electrically connected.

In another embodiment, the conductive through hole 29 can also be disposed on one of the two second conductive pins 281 and 282, and the conductive through hole 29 is used to conduct the two first conductive pins 221 and 222. One of them and one of the two second conductive pins 281 and 282 . In addition, the conductive through hole 29 can further be a conductive hole 292 or a non-conductive hole 293. Taking FIG. 16, FIG. 19 to FIG. 21 as an example, when the conductive hole 292 is provided on the first conductive pin 221 When on the second conductive pin 282, the conductive hole 292 allows the first printed circuits 22 and the second printed circuits 28 to form a loop, and when the non-conductive hole 293 is disposed on the first conductive pin 222 and the second conductive pin 282, the first printed circuits 22 and the second printed circuits 28 do not form a loop.

In another embodiment, the circuit board 20 is also provided with at least one second resistor (not shown in the figure) on the second surface 27, and the second resistor is electrically connected to the second printed circuits 28. Second, and used to provide the output of the two second conductive pins 281 and 282 with higher visibility.

On the other hand, in one embodiment of the present invention, in order to ensure that the operating member 42 can surely contact the conductive elastic piece 241 when it moves through the displacement stroke 421, the operating member 42 has a bulge protruding toward the conductive elastic piece 241. The raised portion 422 contacts the conductive elastic piece 241 during the displacement stroke 421 of the operating member 42 . In another embodiment, the conductive elastic piece 241 has a protruding portion 250 that protrudes toward the operating member 42 . The protruding portion 250 can be directly formed by the conductive elastic piece 241 , or can be an additional one provided on the conductive elastic piece. 241 on the structure. The protrusion 250 contacts the operating member 42 when the operating member 42 moves through the displacement stroke 421 , and the free end 243 contacts the circuit board 20 through the contact of the operating member 42 .

On the other hand, in one embodiment, the housing 10 includes an outer cover 12 forming the space 11 and a base 13 installed in the outer cover 12 . The outer cover 12 is formed with an opening 121 for the operating member 42 to extend, and the base 13 provides the circuit board 20 for placement. The base 13 divides the space 11 into a first part 111 and a second part 112. The first part 111 is closed and allows the operating member 42 to move, and the second part 112 is open, and the first resistor 23 is disposed in the second part 112 .

Following the above, in order to stably place the circuit board 20 on the base 13, the base 13 has a slot 131 formed on the side of the base 13. The slot 131 is used to provide the circuit board 20 to be placed therein. . In one embodiment, the slot 131 may be formed by two extending arms 132 on the base 13 . In another embodiment, the base 13 further has at least one protruding rib 133 formed in the slot 131. The protruding rib 133 cooperates with a through hole 31 on the circuit board 20. When the circuit board 20 is disposed on the When the slot 131 is engaged, the protruding rib 133 extends into the through hole 31 , so that the protruding rib 133 cooperates with the engaging slot 131 to jointly restrict the circuit board 20 .

In addition, the present invention limits the assembly position of the base 13 and the cover 12. In one embodiment, the cover 12 has at least one stepped wall 122 surrounding the space 11, and the stepped wall 122 cooperates with the base 13. , to limit the base 13 position. In addition, the outer cover 12 of the present invention further has at least one limiting block 123, which protrudes toward the space 11. When the base 13 and the outer cover 12 are assembled, the limiting block 123 is stuck in the base 13. bottom to limit the base 13 from falling off.

Furthermore, in order to limit the assembly position of the elastic member 41 of the present invention, in one embodiment, the base 13 has a positioning block 134 located in the first part 111, and the positioning block 134 provides the elastic member 41 to be placed on it. And provide positioning function. In addition, in another embodiment, the operating member 42 is formed with a receiving groove 423 facing the base 13. The receiving groove 423 provides the elastic member 41 to be disposed therein to limit the assembly position of the elastic member 41. In addition, the switching assembly 40 of the present invention includes a cap 43 located outside the housing 10 and sleeved on the operating member 42 .

To sum up, the above is only a preferred embodiment of the present invention. It should not be used to limit the scope of the present invention. That is, all equivalent changes and modifications made according to the patent scope of the present invention should still belong to the present invention. patent coverage.

100: Micro switch 10: Shell 11: Space 111:Part One 112:Part 2 12:Outer cover 121:Open your mouth 122: stepped wall 123: Limit block 13: base 131:Card slot 132:Extension arm 133:Protruding ribs 134: Positioning block 20:Circuit board 21: Side 1 22:First printing line 221: First conductive pin 222: First conductive pin 223: First conductive pin 23: First resistor 231: First resistor 232: First resistor 24:Touch structure 241: Conductive shrapnel 242: Fixed end 243: Free end 244:Mounting arm 245: Conductive bumps 246: Conductive shrapnel 247: Conductive shrapnel 248: Free end 249: Free end 250:Protrusion 26:Mounting holes 27:Second side 28:Second Printing Line 281: Second conductive pin 282: Second conductive pin 29: Conductive through hole 291:port 292: Via hole 293: No via hole 31:Perforation 40:Switch components 41: Elastic parts 42: Operating parts 421: Displacement stroke 422: bulge 423: Accommodation tank 43:Cap

Figure 1 is an exploded schematic diagram of the structure of the first embodiment of the present invention. Figure 2 is an exploded schematic structural diagram from another direction of the first embodiment of the present invention. Figure 3 is a schematic structural cross-sectional view of the first embodiment of the present invention. Figure 4 is a schematic diagram of a circuit board according to the first embodiment of the present invention. Figure 5 is a schematic circuit diagram of the first embodiment of the present invention. Figure 6 is a schematic cross-sectional view of the structure of the first embodiment of the present invention. Figure 7 is a schematic circuit diagram of the first embodiment of the present invention. Figure 8 is a schematic structural cross-sectional view of the second embodiment of the present invention. Figure 9 is a schematic diagram of a circuit board according to the third embodiment of the present invention. Figure 10 is a schematic circuit diagram of the third embodiment of the present invention. Figure 11 is a schematic circuit diagram of the third embodiment of the present invention. Figure 12 is an exploded schematic diagram of the structure of the fourth embodiment of the present invention. Figure 13 is an exploded schematic diagram of the structure from another direction of the fourth embodiment of the present invention. Figure 14 is a schematic structural cross-sectional view of the fourth embodiment of the present invention. Figure 15 is a schematic diagram of the first side of the circuit board according to the fourth embodiment of the present invention. Figure 16 is a first circuit schematic diagram of the fourth embodiment of the present invention. Figure 17 is a schematic structural cross-sectional view of the fourth embodiment of the present invention during implementation. Figure 18 is a first circuit schematic diagram of the fourth embodiment of the present invention. Figure 19 is a schematic diagram of the second side of the circuit board according to the fourth embodiment of the present invention. Figure 20 is a second circuit schematic diagram of the fourth embodiment of the present invention. Figure 21 is a second circuit schematic diagram of the fourth embodiment of the present invention. Figure 22 is a schematic structural cross-sectional view of the fifth embodiment of the present invention. Figure 23 is a schematic diagram of a circuit board according to the sixth embodiment of the present invention. Figure 24 is a schematic circuit diagram of the sixth embodiment of the present invention. Figure 25 is a schematic circuit diagram of the sixth embodiment of the present invention. Figure 26 is a schematic diagram of a circuit board according to the seventh embodiment of the present invention. Figure 27 is a schematic circuit diagram of the seventh embodiment of the present invention. Figure 28 is a schematic circuit diagram of the seventh embodiment of the present invention.

100: Micro switch

10: Shell

12:Outer cover

121:Open your mouth

13: base

131:Card slot

132:Extension arm

133:Protruding ribs

134: Positioning block

20:Circuit board

21: Side 1

22:First printing line

221: First conductive pin

222: First conductive pin

23: First resistor

24:Touch structure

241: Conductive shrapnel

242: Fixed end

243: Free end

244:Mounting arm

250:Protrusion

26:Mounting holes

31:Perforation

40:Switch components

41: Elastic parts

42: Operating parts

422: bulge

423: Accommodation tank

43:Cap

Claims (10)

A micro switch includes: a housing forming a space; a circuit board assembled with the housing; the circuit board has a first surface at least partially facing the space; and a third surface opposite to the first surface. Two sides, a plurality of first printed circuits arranged on the first side, and a plurality of second printed circuits arranged on the second side, at least one of which is provided on the first side and formed with two of the first printed circuits a first resistor in a conductive relationship, a touch structure on the first surface, and at least one conductive through hole electrically connecting one of the first printed circuits and one of the second printed circuits, Two of the first printed circuits extend outside the housing to serve as at least two first conductive pins of the micro switch, and two of the second printed circuits extend outside the housing to serve as at least two first conductive pins of the micro switch. The second conductive pins, the first printed circuits, the first resistor and the touch structure cause the two first conductive pins to generate at least two first electrical signals, and the resistance values of the two first electrical signals are different; and A switching component includes an elastic member located in the space, and an operating member connected to the elastic member and extending out of the housing for pressing. The operating member has a displacement stroke in the space. The operating member is The touching structure during the displacement stroke causes one of the two first electrical signals generated by the two first conductive pins to change to the other of the two first electrical signals. The two second conductive contacts The electrical signal generated by the foot changes. The micro switch of claim 1, wherein the triggering structure is at least one conductive elastic piece. The micro switch of claim 2, wherein the conductive elastic piece has a fixed end installed on the circuit board and electrically connected to one of the first printed circuits, and a free end opposite to the fixed end, the The free end is touched when the operating member moves through the displacement stroke and contacts another one of the first printed circuits. The micro switch of claim 2, wherein the touch structure is at least two conductive spring pieces, and the operating member touches at least one of the two conductive spring pieces before and after the displacement stroke. The micro switch of claim 1, wherein the circuit board has at least one second resistor disposed on the second surface and electrically connected to two of the second printed circuits. The micro switch according to any one of claims 1 to 5, wherein the housing includes an outer cover forming the space and a base installed in the outer cover and providing the circuit board arrangement, the base distinguishes the space as A first part and a second part, the first part provides the operating member with movement, and the first resistor is disposed in the second part. The micro switch of claim 6, wherein the base has a slot formed on the side of the base to provide the circuit board. The micro switch of claim 7, wherein the base has at least one protruding rib formed in the slot and cooperating with the slot to jointly restrict the circuit board. The micro switch of claim 7, wherein the outer cover has at least one stepped wall surrounding the space to limit the position of the base. The micro switch of claim 6, wherein the base has a positioning block located on the first part for positioning the elastic member.