TWI449070B - To improve the resilience of the micro switch - Google Patents

Description

Micro switch that enhances resilience

The invention relates to a micro switch for improving resilience, in particular to a micro switch with better resilience after being pressed.

With the advancement of technology, the size of various electronic devices (such as mice) has become smaller and smaller, and the electronic components required for this type of miniaturized electronic device are of course more miniaturized, and are required to constitute electronic device signals. Electronic components are still mostly based on switches.

In the existing technology, the structure of the micro switch can be found in the patents of the Republic of China No. M350087, No. 507921, No. 289485, etc., and the patent No. M350087 discloses a micro switch including a housing and a common terminal. , normally closed terminal, normally open terminal, movable contact piece, tension spring, button and presser foot. A dovetail is added to the presser foot to increase the force receiving area of the presser foot to avoid the card being broken. In addition, the force of the movable contact piece is better controlled by the tension spring to obtain a more uniform and sensitive force, thereby further improving the working performance and reliability of the movable contact piece.

No. 507921 provides a micro switch comprising an upper body and a lower body sandwiched by two phases, and a guiding contact and a fixed contact surface on the top of the lower body, and a fixed end of the actuating member Positioned on the fixed contact surface, and a movable end is provided with a contact block. When the pressing member is pressed, the movable member is pressed by the bottom of the pressing member to make the movable end of the movable member move relative to each other, and the contact block is caused to be driven. Contact with the contact point to achieve the purpose of on/off.

In addition, the patent No. 289485 discloses a micro switch having a stop rib, which is provided with two raised rectangular ribs on the cover surface to control the pressing stroke of the switch to improve the service life.

Although the above patents achieve different purposes and effects, respectively, they still have common technical features. Please refer to FIG. 1 . The micro switch disclosed in FIG. 1 is similar to the micro switch of the aforementioned patent, and has a body 30. The common body 31 is provided with a common terminal 31, a normally closed terminal 32 and a normally open terminal 33. The common terminal 31 is connected with a conductive elastic piece 34, and the conductive elastic piece 34 is corresponding to the normally open terminal 33. The first contact portion 341 and the second contact portion 331 , the conductive elastic piece 34 normally contacts the normally closed terminal 32 , and after being pressed, the first contact portion 341 abuts the second contact portion 331 of the normally open terminal 33 , Thereby, the common terminal 31 and the normally open terminal 33 are electrically connected to achieve the function of command or signal output.

However, when the conductive elastic piece 34 is pressed, the first contact portion 341 of the conductive elastic piece 34 does not translate downward to contact the second contact portion 331 of the normally open terminal 33. In fact, the conductive elastic piece 34 is connected to The position of the common terminal 31 serves as a fixed end, and is deformed to swing downward, and the second contact portion 331 of the normally open terminal 33 has a horizontal plane structure. Therefore, the first contact portion 341 swings downward and generates an angle. After the change, the first contact portion 341 and the second contact portion 331 are only connected to one contact point, and the common terminal 31 and the normally open terminal 33 transmit power through the contact point, thereby deriving the following problem:

1. The area of the power transmission is too small, causing the temperature of the contact point of the first contact portion 341 and the second contact portion 331 to rise.

2. The suction force of the first contact portion 341 and the second contact portion 331 is increased to cause adhesion, and the conductive elastic piece 34 is insufficient in resilience.

3. If the resilience is to be increased, the height of the second contact portion 331 must be increased, and the distance between the normally closed terminal 32 and the normally open terminal 33 is shortened, resulting in a drop in withstand voltage.

4. The conductive elastic piece 34 swings downward by a short distance and is supported by the corners of the second contact portion 331 to increase the resistance of the pressing.

The main object of the present invention is to solve the above-mentioned defects to increase the contact area and to enhance the resilience of the shrapnel.

In order to achieve the above object, the present invention provides a micro switch for improving resilience, comprising a body, and a first pin and a second pin disposed on the base body, wherein the base body is provided with a cover The body is formed with an accommodating space between the body and the cover body, and the cover body is provided with a pressing member movable up and down; and the first pin is provided with a fixing portion in the accommodating space for receiving a guiding member pressed by the pressing member, the guiding member is provided with a lower contact portion and the guiding member is oscillated in the up and down movement of the pressing member; and the second pin is provided with a corresponding space in the receiving space The upper surface of the base body is a parallel connecting portion for fixing a contact point with the lower contact portion when the connecting member swings, the contact point having an inclined surface for increasing the swinging distance of the connecting member The height of the inclined surface is tapered toward the fixing portion of the first pin so that the contact has a different thickness and forms a predetermined angle with the connecting portion. In addition, in a specific embodiment of the present invention, the contact surface and the inclined surface may be a plane or a curved surface of a corresponding contact, and the guiding member is a conductive elastic piece and is provided with a elasticity supported by the fixing portion. The elastic member normally supports the contact surface from the inclined surface.

According to the above technical solution, the invention can increase the contact area between the guiding member and the second pin, reduce the adhesion caused by the connecting member contacting the second pin to transmit power, and improve the return of the guiding member. Elasticity, and reduce the resistance of the guide under pressure, increasing the smoothness of the use of the micro switch.

10‧‧‧ cover

11‧‧‧Pressing parts

20‧‧‧ body

21‧‧‧First pin

211‧‧‧ Fixed Department

22‧‧‧second pin

221‧‧‧Contacts

222‧‧‧ sloped surface

23‧‧‧ third pin

231‧‧‧Contacts

24‧‧‧ accommodating space

25‧‧‧Connector

26‧‧‧Flexible parts

27‧‧‧Upper contact

28‧‧‧Contacts

29‧‧‧ Connection Department

30‧‧‧ body

31‧‧‧Shared terminal

32‧‧‧Normally closed terminal

33‧‧‧Normally open terminal

331‧‧‧Second contact

34‧‧‧Electrical shrapnel

341‧‧‧First contact

Figure 1 is a schematic illustration of a prior art.

Figure 2 is an exploded perspective view of the present invention.

3-1 to 3-2 are schematic views of the operation of the present invention.

Figure 4 is a schematic view of another embodiment of the present invention.

The detailed description and technical content of the present invention will now be described as follows: Referring to FIG. 2, FIG. 3-1 to FIG. 3-2, the present invention is a micro-switching device for improving resilience, which mainly includes a body 20 and a cover body disposed on the base body 20. The cover body 10 is provided with a pressing member 11 that can move up and down, and an accommodation space 24 is formed between the base body 20 and the cover body 10. The base body 20 is provided with a first pin 21 and a second pin 22. In the embodiment shown in the figure, the base 20 is further provided with a third pin 23 through which the The first, second, and third pins 21, 22, 23 mount the microswitch in an electronic device (not shown), such as a circuit board. The first pin 21 is provided with a fixing portion 211 in the accommodating space 24 for connecting with the connecting member 25, and the connecting member 25 is a conductive elastic piece and is provided with a The elastic member 26 is supported by the fixing portion 211, and one end of the connecting member 25 is coupled to the fixing portion 211, and the upper end is respectively provided with an upper contact portion 27 and a lower contact portion 28 on the upper and lower sides.

The second pin 22 and the third pin 23 are respectively provided with a contact point 221, 231 in the accommodating space 24, and the contacts 221 and 231 of the second pin 22 and the third pin 23 are respectively located. The upper and lower sides of the connecting member 25 are disposed at the corresponding positions of the lower contact portion 28 and the upper contact portion 27, and the second pin 22 is provided in parallel with the upper surface of the base member 20. The contact portion 221 is disposed on the connecting portion 29 and is provided with a pair of inclined surfaces 222 of the lower contact portion 28, and the height of the inclined surface 222 is toward the fixing portion 211 of the first pin 21 The contacts 221 are tapered to have different thicknesses and form a predetermined angle with the connecting portion 29.

The guiding member 25 is normally subjected to the elastic force of the elastic member 26, is supported by the elastic member 26 to push the pressing member 11 upward, and the upper contact portion 27 abuts against the joint 231 of the third pin 23, The first pin 21 is electrically connected to the third pin 23 (as shown in FIG. 3-1); if a pressing force is applied to the pressing member 11, the pressing member 11 moves downward. And pressing the guiding member 25 to deform the guiding member 25 and swing downward, and contacting the inclined surface 222 of the contact 221 of the second pin 22 with the lower contact portion 28, so that the first pin 21 and the first pin 21 The second pin 22 is electrically connected (as shown in Figure 3-2). The inclined surface 222 can be a plane as shown in the drawing, or, as shown in FIG. 4, the inclined surface 222 can be a curved surface.

Therefore, the present invention mainly provides an inclined surface 222 at the contact 221 of the second pin 22, and when the user presses the micro switch to output an operation command or signal, the guide member 25 is pressed and deformed. Swinging downwardly, and contacting the inclined surface 222 through the lower contact portion 28, the first pin 21 and the second pin 22 can transmit power through the contact surface, which is compared with the prior art. The following advantages:

1. Increasing the area of power transmission to lower the temperature at which the contact member 25 is in contact with the second pin 22, and increasing the service life of the micro switch.

2. Reducing the adsorption force when the connecting member 25 is in contact with the second pin 22 to transmit electric power, improving the phenomenon that the connecting member 25 and the second pin 22 are adhered, and improving the return of the guiding member 25 elastic force.

3. Increasing the distance that the guiding member 25 swings downward through the inclined surface 222 to increase the shape variable of the guiding member 25, reducing the resistance when the pressing member 11 is pressed down, achieving labor-saving operation and increasing the pressing of the micro-switch Feel.

Fourth, increase the distance between the second pin 22 and the third pin 23 contact point, can withstand higher withstand voltage test, pass the higher amperage safety certification.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and the equivalent variations and modifications of the scope of the present invention are intended to be within the technical scope of the present invention.

10‧‧‧ cover

11‧‧‧Pressing parts

20‧‧‧ body

21‧‧‧First pin

211‧‧‧ Fixed Department

22‧‧‧second pin

221‧‧‧Contacts

222‧‧‧ sloped surface

23‧‧‧ third pin

24‧‧‧ accommodating space

25‧‧‧Connector

26‧‧‧Flexible parts

27‧‧‧Upper contact

29‧‧‧ Connection Department

Claims (6)

A micro switch for improving resilience, comprising: a body, the cover body is provided with a cover body, and an accommodation space is formed between the cover body, and the cover body is provided with a pressing member movable up and down; The first pin is disposed on the base body and is provided with a fixing portion in the accommodating space for connecting a connecting member pressed by the pressing member, the guiding member is provided with a lower contact portion and the guiding member a swing is generated in the up-and-down movement of the pressing member; a second pin is disposed on the base body and a connecting portion disposed parallel to the upper surface of the seat body is disposed in the receiving space to fix the same a contact point of the guiding member with the lower contact portion, the contact point having an inclined surface for increasing the swinging distance of the connecting member, the height of the inclined surface being toward the fixing portion of the first pin The taper is tapered such that the contacts have different thicknesses and form a predetermined angle with the joint. The micro-removable switch for improving resilience as described in claim 1, wherein the inclined surface is a flat surface. The micro-switching device for improving resilience according to claim 1, wherein the inclined surface is a curved surface. The micro-removable switch for improving resilience according to claim 1, wherein the guiding member is a conductive elastic piece. The ejector-removing micro-switch according to claim 1, wherein the guiding member is provided with an elastic member supported on the fixing portion, and the elastic member normally supports the guiding member upward. The micro-switching device for improving resilience according to claim 1, wherein the seat body is further provided with a third pin, and the third pin and the connecting member are in contact with the normal state. Contact part.