Microswitch

Abstract

The invention relates to a microswitch, which comprises two terminals arranged at an interval, a connecting conductor positioned between the two terminals, an actuator connected with one of the two terminals, at least one resistor and a group of power connection sheets connected with the connecting conductor, a mounting gap is formed on one side of each of the two terminals facing the other of the two terminals, the two terminals are measured to obtain an electric signal which can change when the microswitch is operated, and two resistor mounting spaces are defined by the connecting conductor and the two mounting gaps of the two terminals. The actuator moves after operation, the at least one resistor takes the two resistor mounting spaces as mounting positions and is in contact with one of the two mounting notches to generate a conductive relationship with one of the two terminals, and the power connection sheet is provided with two pins which respectively extend into the two resistor mounting spaces and are electrically connected with the two resistor mounting spaces. The power connection sheet forms a conductive relationship by contacting one of the two pins with the at least one resistor.

Description

Technical Field

[0001] The present invention relates to a micro switch, in particular to a micro switch provided with a power connection sheet and not requiring resistors to be connected in a welding manner. Background Art

[0002] With the development of technology, micro switches are now mostly used for signal switching to precisely control component movement. In order to improve signal discrimination, resistors are set in the micro switches to identify the signal through the difference in resistance before and after operation. In addition, conventional micro switches will have disconnection problems during the signal switching process, which is very unfavorable for component control.

[0003] To solve the above problems, the existing patents CN 207752913U, JP 6906183, JP 7270221B, JP7281752B, and JP 201676356A propose micro switches that can avoid signal disconnection. However, the above micro switches still have structural deficiencies. For example, in CN 207752913U, JP 6906183, JP 7270221B, and JP 7281752B, the micro switches disclosed in the above patents use metal lead frames to form the conductive pins of the micro switches, but the metal lead frames need to be fixed to the resistors by welding, and then the resistors are embedded in the base by insert molding. The above process steps are not conducive to the disassembly and assembly of the resistors, and at the same time increase the complexity and difficulty of the process.

[0004] In addition, JP 201676356A Figure 6 The disclosed micro switch sets the resistor on the circuit board, but the technical solution implemented by the circuit board is not conducive to the manufacturing process, because the circuit board needs to plan the circuit configuration in advance, and then the board body is etched based on the plan to form a printed circuit, and finally the resistor is set on the circuit board to form an electrical connection with the printed circuit. In addition, the technical solution of using the circuit board in JP 201676356A is limited by the configured circuits and electronic components, and it is difficult to reduce the volume, which affects the miniaturization of the micro switch. Summary of the invention

[0005] The main purpose of the present invention is to solve the problem that conventional switches are inconvenient to assemble because resistors are connected in a welding manner.

[0006] Another object of the present invention is to solve the problem that the conventional switch is implemented with a circuit board, which is not conducive to the miniaturization of the switch.

[0007] To achieve the above object, the present invention provides a micro switch, comprising two terminals arranged at intervals, a connecting conductor located between the two terminals, an actuator electrically connected to one of the two terminals and displaced after operation, at least one resistor, and a set of connecting plates connected to the connecting conductor. Each of the two terminals forms a mounting notch on a side facing the other of the two terminals, and the two terminals are measured to obtain an electrical signal that can generate changes when the micro switch is operated. The connecting conductor and the two mounting notches of the two terminals define two resistor mounting spaces. The actuator is displaced to a first position that does not contact the connecting conductor and a second position that contacts the connecting conductor. The at least one resistor is selectively placed in one of the two resistor mounting spaces. The at least one resistor contacts one of the two mounting notches and generates a conductive relationship with one of the two terminals. The at least one resistor uses the two resistor mounting spaces as the mounting position. The at least one resistor contacts one of the two mounting notches and generates a conductive relationship with one of the two terminals. The power connection sheet has two pins that extend into the two resistor mounting spaces respectively, and the power connection sheet contacts the at least one resistor with one of the two pins to form a conductive relationship.

[0008] In one embodiment, the connecting conductor forms a set of through holes connected to the contact plate.

[0009] In one embodiment, the power connection plate has a protrusion disposed between the two pins and connected to the through hole.

[0010] In one embodiment, each of the two pins is bent.

[0011] In one embodiment, the contact plate forms a positioning block which is at least necessarily located on the connecting conductor.

[0012] In one embodiment, each of the at least one resistor is a surface mount resistor.

[0013] In one embodiment, the actuator contacts only one of the two terminals when displaced between the first position and the second position.

[0014] In one embodiment, each of the two terminals has a bent section forming the installation notch and a power connection section connected to the bent section, and one of the two terminals has an action section connected to the bent section and in contact with the actuator.

[0015] In one embodiment, the micro switch has a base connecting the two terminals and the connecting conductor, and the base forms at least one through hole corresponding to the two resistor installation spaces.

[0016] In one embodiment, the base has at least one positioning wall disposed on one side of the at least one through hole and providing positioning for the at least one resistor.

[0017] In one embodiment, the base forms at least one pair of support posts for supporting the connecting conductors.

[0018] In one embodiment, the micro switch includes an upper cover connected to the base, an operating member exposed to the upper cover, a movable block connected to the actuator and driven by the operating member, and a reset spring disposed on the base and connected to the movable block.

[0019] According to the above invention content, compared with conventional technology, the present invention has the following characteristics: the micro switch of the present invention is provided with the power contact plate, and the power contact plate touches the two resistors through the two pins to form an electrical connection, thereby reducing the assembly problems caused by the conventional switch needing to fix the resistor by welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structural decomposition of the first embodiment of the present invention.

[0021] Figure 2 It is a schematic cross-sectional view of the structure of the first embodiment of the present invention.

[0022] Figure 3 1 is a schematic diagram of the structural decomposition of the second embodiment of the present invention (I).

[0023] Figure 4 2 is a schematic diagram of the structural decomposition of the second embodiment of the present invention.

[0024] Figure 5 1 is a schematic structural cross-sectional view of a second embodiment of the present invention.

[0025] Figure 6 yes Figure 5 Schematic diagram of the AA line segment section.

[0026] Figure 7 2 is a schematic structural cross-sectional view of the second embodiment of the present invention.

[0027] Figure 8 3 is a schematic structural cross-sectional view of the second embodiment of the present invention.

[0028] Fig. 9 It is a schematic diagram of the structural decomposition of the third embodiment of the present invention.

[0029] Fig.10 1 is a schematic structural cross-sectional view of a third embodiment of the present invention.

[0030] Fig.11 2 is a schematic structural cross-sectional view of the third embodiment of the present invention.

[0031] Fig.123 is a schematic structural cross-sectional view of the third embodiment of the present invention.

[0032] Fig.13 1 is a circuit diagram of the present invention.

[0033] Fig.14 2 is a circuit diagram of the present invention.

[0034] Fig.15 It is the circuit schematic diagram (three) of the present invention.

[0035] Fig.16 It is the circuit schematic diagram (four) of the present invention. DETAILED DESCRIPTION

[0036] The detailed description and technical contents of the present invention are described as follows with reference to the accompanying drawings:

[0037] See also Figures 1 to 5 The present invention provides a micro switch 20, comprising two terminals 22 arranged at intervals, a connecting conductor 23, an actuator 24, at least one resistor 25, and an electrical connection plate 26. Specifically, the two terminals 22 have a conductive function, and the two terminals 22 are used as the connection between the micro switch 20 and at least one external device (not shown in the figure). The two terminals 22 can be measured to generate an electrical signal that can change when the micro switch 20 is operated. In more detail, the two terminals 22 are arranged on a base 21 of the micro switch 20, and the base 21 is formed of the insulating material, and after the two terminals 22 are installed on the base 21, they are arranged side by side and at intervals along the thickness direction of the base 21. In addition, each of the two terminals 22 forms an installation notch 221, and the installation notch 221 is located on a side of each of the two terminals 22 facing the other of the two terminals 22, so that the opening directions of the two installation notches 221 are facing each other.

[0038] The connecting conductor 23 is located between the two terminals 22 and is disposed on the base 21, and is spaced apart from the two terminals 22. The connecting conductor 23 and the two mounting notches 221 of the two terminals 22 define two resistor mounting spaces 231. The actuator 24 has a conductive function and is used as a signal switcher of the micro switch 20. The actuator 24 is electrically connected to one of the two terminals 22 and is displaced after operation. During displacement, one end of the actuator 24 connected to one of the two terminals 22 slides on one of the two terminals 22, thereby continuously maintaining a conductive relationship with one of the two terminals 22, while the other end of the actuator 24 moves between a first position not in contact with the connecting conductor 23 and a second position in contact with the connecting conductor 23. It can be seen that the other end of the actuator 24 does not continuously maintain an electrical connection with the connecting conductor 23. It should be noted that the first position and the second position described in the present invention do not limit the switching order of the micro switch 20. Figures 1 to 8 In the embodiment described above, the actuator 24 is in the first position when not operated, and in the second position when operated. Figures 9 to 12 In the described embodiment, the actuator 24 is in the second position when not operated, and is in the first position when operated.

[0039] Continuing from the above, the at least one resistor 25 uses the two resistor installation spaces 231 as the installation position. Each of the at least one resistor 25 has two conductive pins 251. The two conductive pins 251 are located at both ends of each of the at least one resistor 25. One of the two conductive pins 251 contacts one of the two installation notches 221 to form a conductive relationship with one of the two terminals 22. In addition, the power connection plate 26 has a conductive function. The power connection plate 26 is assembled on the connecting conductor 23. The power connection plate 26 has two pins 261. The two pins 261 extend into the two resistor installation spaces 231 respectively. One of the two pins 261 is connected to the at least one resistor 25. One of the two pins 261 does not weld the at least one resistor 25, but touches the one of the two conductive pins 251 that is not in contact with the two installation notches 221 to form a conductive relationship with the at least one resistor 25.

[0040] As above, please refer to Figure 1 and Figure 2 , the implementation of the micro switch 20 will be described later. For the convenience of explaining the micro switch 20, the two terminals 22 are divided into a first terminal 222 that is continuously connected to the actuator 24, and a second terminal 223. Figure 1 to Figure 2 ,and Fig.13For example, it is assumed that the number of the at least one resistor 25 is one, and the resistor 25 is installed in the resistor installation space 231 between the connecting conductor 23 and the second terminal 223, and electrically connects the connecting conductor 23 and the second terminal 223. At the beginning of the micro switch 20, the actuator 24 is not displaced and is in the first position. At this time, the actuator 24 does not conduct the first terminal 222 and the connecting conductor 23. After the first terminal 222 receives the current, the current cannot enter the second terminal 223 through the actuator 24 and the connecting conductor 23, so that the first terminal 222 and the second terminal 223 are disconnected. When the actuator 24 is operated and displaced to the second position, the actuator 24 conducts the first terminal 222 and the connecting conductor 23. At this time, after the first terminal 222 receives the current, the current flows into the second terminal 223 via the actuator 24, the power strip 26, the resistor 25, so that the electrical signal output between the first terminal 222 and the second terminal 223 is the resistance value of the resistor 25. Similarly, assuming that the resistor 25 electrically connects the first terminal 222 and the connecting conductor 23, and the actuator 24 is initially not displaced and is in the first position, the electrical signal output between the first terminal 222 and the second terminal 223 is the resistance value of the resistor 25. When the actuator 24 is displaced and enters the second position, a short circuit will occur between the first terminal 222 and the second terminal 223, which will not be described in detail.

[0041] Furthermore, the actuator 24 may be in the second position when not operated, and change to the first position after operation. When the resistor 25 connects the connecting conductor 23 and the second terminal 223, the actuator 24 initially conducts the first terminal 222 and the connecting conductor 23, so that the electrical signal output by the first terminal 222 and the second terminal 223 is the resistance value of the resistor 25. When the actuator 24 moves from the second position to the first position, the actuator 24 releases the conducting relationship between the first terminal 222 and the connecting conductor 23, so that the first terminal 222 and the second terminal 223 are disconnected. Similarly, when the resistor 25 connects the first terminal 222 and the connecting conductor 23, the actuator 24 initially conducts the first terminal 222 and the connecting conductor 23, so that a short circuit occurs between the first terminal 222 and the second terminal 223. When the actuator 24 enters the first position from the second position, the actuator 24 releases the conductive relationship between the first terminal 222 and the connecting conductor 23, so that the electrical signal output by the first terminal 222 and the second terminal 223 is the resistance value of the resistor 25.

[0042] As can be seen from the above, the micro switch 20 of the present invention no longer fixes the resistor by welding, but through the arrangement of the power connection sheet 26, the number of welding points is reduced and the assembly of the at least one resistor 25 is facilitated. At the same time, the present invention can also solve the problems generated during the switching process of conventional switch signals and improve the stability and accuracy of component control.

[0043] As above, please refer to Figures 1 to 6 The connecting conductor 23 of the present invention forms a through hole 232, and the through hole 232 penetrates the connecting conductor 23 to provide the connection piece 26 for assembly. It should be understood that the connecting piece 26 of the present invention has elastic deformation ability. Before the connecting piece 26 is assembled with the through hole 232, it is pre-compressed to accumulate elastic force. Once the connecting piece 26 extends into the through hole 232 and is released, the connecting piece 26 releases the elastic force and is stuck in the through hole 232. Further, the connecting piece 26 has a protrusion 262 that is assembled with the through hole 232. The protrusion 262 is arranged between the two pins 261 and facilitates the connecting piece 26 to extend between the through holes 232. In addition, at least one positioning block 265 can be formed on the connecting piece 26. The at least one positioning block 265 is located on the protrusion 262 and assembled with the connecting conductor 23 to achieve the purpose of positioning and preventing falling off.

[0044] On the other hand, in order to position the at least one resistor 25, in one embodiment, each of the two pins 261 of the power connection plate 26 is bent to provide a positioning function for the at least one resistor 25. In addition, each of the at least one resistor 25 of the present invention is a surface mount resistor, that is, the at least one resistor 25 is formed on the base 21 and then arranged on the base 21 through surface mount technology (SMT). To assist the surface mounting process of the at least one resistor 25, at least one through hole 213 corresponding to the two resistor mounting spaces 231 is formed on the base 21. The through hole 213 penetrates the base 21 to provide the at least one resistor 25 to be arranged therein. In one embodiment, the at least one through hole 213 further corresponds to the through hole 232 to provide the power connection plate 26 to be arranged therein. In addition, to assist in positioning the at least one resistor 25 , the base 21 has at least one positioning wall 214 . The positioning wall 214 is disposed on one side of the through hole 213 to limit the assembly position of the at least one resistor 25 .

[0045] Furthermore, in order to assist in fixing the at least one resistor 25, after the at least one resistor 25 is installed on one of the two terminals 22, the at least one resistor 25 can be fixed by glue dispensing, and the glue dispensing position of the at least one resistor 25 can be the side of the two conductive pins 251 that contacts one of the two terminals 22, or the side of the at least one resistor 25 facing the actuator 24.

[0046] As mentioned above, the number of the at least one resistor 25 of the present invention can be two, that is, the two resistors 25 are respectively arranged in the two resistor installation spaces 231. Figures 3 to 12 , Fig.14 and Fig.16 For the convenience of explaining the two resistors 25, the two resistors 25 are divided into a first resistor 252 connected to the first terminal 222, and a second resistor 253 connected to the second terminal 223. For example, in the embodiment where the actuator 24 is initially in the first position, when the actuator 24 is not displaced, the electrical signal measured between the first terminal 222 and the second terminal 223 is the sum of the resistance values ​​of the first resistor 252 and the second resistor 253. When the actuator 24 enters the second position, the electrical signal measured between the first terminal 222 and the second terminal 223 is the resistance value of the second resistor 253. Taking the embodiment in which the actuator 24 is initially in the second position as an example, when the actuator 24 is not displaced, the electrical signal measured between the first terminal 222 and the second terminal 223 is the resistance value of the first resistor 252. When the actuator 24 enters the second position, the electrical signal measured between the first terminal 222 and the second terminal 223 is the sum of the resistance values ​​of the first resistor 252 and the second resistor 253. In this embodiment, the resistance values ​​of the first resistor 252 and the second resistor 253 are not limited to be the same or different.

[0047] On the other hand, each of the two terminals 22 of the present invention has a bent section 224 and a power connection section 225. The bent section 224 forms the installation notch 221 and can be assembled with the at least one resistor 25. The power connection section 225 is connected to the bent section 224 and extends away from the actuator 24 to be exposed to the surface of the micro switch 20. In the present invention, one of the two terminals 22 further has an action section 226 connected to the bent section 224. The action section 226 is located on the side of the bent section 224 that is not connected to the power connection section 225. The action section 226 maintains contact with the actuator 24, so that the actuator 24 only contacts one of the two terminals 22 when it moves between the first position and the second position.

[0048] Continuing, the connecting conductor 23 of the present invention is arranged on the base 21 and has no portion exposed to the surface of the micro switch 20. The base 21 provides support for the connecting conductor 23. The base 21 forms at least one support column 215. The support column 215 extends toward the actuator 24 and is assembled with the connecting conductor 23. In one embodiment, the support column 215 further has a contact block 217 that can contact the actuator 24. The contact block 217 is located at the second position of the actuator 24, so that the actuator 24 cannot conduct the first terminal 222 and the second terminal 223.

[0049] On the other hand, see Figures 1 to 6 The micro switch 20 of the present invention further comprises an upper cover 27 connected to the base 21, an operating member 28 exposed to the upper cover 27, a movable block 29 connected to the operating member 28, and a return spring 30 disposed on the base 21 and connected to the movable block 29. The upper cover 27 is hollow and serves as the housing of the micro switch 20 together with the base 21. The upper cover 27 and the base 21 can be joined by laser welding or gluing to improve the waterproofness of the upper cover 27 and the base 21. In addition, the upper cover 27 forms at least one positioning column 271, which is located inside the upper cover 27 and contacts the base 21 to limit the assembly position of the base 21.

[0050] Continuing from the above, to facilitate operation, the operating member 28 is exposed on the surface of the upper cover 27, the movable block 29 is connected to the operating member 28, and partially extends out of the upper cover 27. When the operating member 28 is subjected to force, the movable block 29 is driven and then links the actuator 24. The return spring 30 is compressed when the actuator 24 is displaced and stores elastic force. When the operating member 28 is no longer subjected to force, the return spring 30 pushes the actuator 24 to return. In one embodiment, to assist in positioning the return spring 30, the base 21 forms at least one protrusion 216 in which one end of the return spring 30 is disposed, and the movable block 29 forms an assembly groove 291 in which the other end of the return spring 30 is disposed. In addition, at least one limiting hole 293 is formed on the movable block 29, and the actuator 24 is formed with at least one lug assembled with the limiting hole.

[0051] [Description of the accompanying drawings]

[0052] 20: Micro switch

[0053] 21: Base

[0054] 213:Through hole

[0055] 214: Positioning Wall

[0056] 215: Support column

[0057] 216: Bump

[0058] 217: Contact block

[0059] 22:Terminal

[0060] 221: Installation gap

[0061] 222: First terminal

[0062] 223: Second terminal

[0063] 224: Bend section

[0064] 225: Power connection section

[0065] 226: Action segment

[0066] 23: Connecting conductor

[0067] 231: Resistor installation space

[0068] 232:Piercing

[0069] 24: Actuator

[0070] 241: Lug

[0071] 25: Resistor

[0072] 251: Conductive pin

[0073] 252: first resistor

[0074] 253: Second resistor

[0075] 26: Connector

[0076] 261: Pin

[0077] 262: bulge

[0078] 265: Positioning block

[0079] 27: Upper cover

[0080] 28: Operating parts

[0081] 29:Activity Block

[0082] 291:Mounting slot

[0083] 293: Restriction hole

[0084] 30: Return spring.

Claims

1. A micro switch, characterized in that: Include: Two terminals are arranged at intervals, each of the two terminals forms a mounting notch on a side facing the other of the two terminals, and an electrical signal that can generate a change when the micro switch is operated is measured by measuring the two terminals; A connecting conductor is located between the two terminals, and the connecting conductor and the two mounting notches of the two terminals define two resistor mounting spaces; an actuator electrically connected to one of the two terminals and displaced after operation, the actuator displacing to a first position not contacting the connecting conductor and a second position contacting the connecting conductor; At least one resistor is installed in the two resistor installation spaces, and the at least one resistor contacts one of the two installation notches to establish a conductive relationship with one of the two terminals; and An electrical connection plate is assembled on the connecting conductor and has two pins extending into the two resistor installation spaces respectively. The electrical connection plate contacts the at least one resistor with one of the two pins to form a conductive relationship.

2. The micro switch according to claim 1, characterized in that: The connecting conductor forms a group of through holes connected to the connecting plate.

3. The micro switch according to claim 2, characterized in that: The power connecting plate has a protruding portion which is arranged between the two pins and assembled with the through hole.

4. The micro switch according to claim 3, characterized in that: Each of the two pins is bent.

5. The micro switch according to claim 2, characterized in that: The connecting piece forms a positioning block which is at least necessarily located on the connecting conductor.

6. The micro switch according to any one of claims 1 to 5, characterized in that: Each of the at least one resistor is a surface mount resistor.

7. The micro switch according to any one of claims 1 to 5, characterized in that: The actuator contacts only one of the two terminals when displaced between the first position and the second position.

8. The micro switch according to claim 7, characterized in that: Each of the two terminals has a bent section forming the installation notch and a power connection section connected to the bent section, and one of the two terminals has an action section connected to the bent section and in contact with the actuator.

9. The micro switch according to any one of claims 1 to 5, characterized in that: The micro switch has a base connecting the two terminals and the connecting conductor, and the base forms at least one through hole corresponding to the installation spaces of the two resistors.

10. The micro switch according to claim 9, characterized in that: The base has at least one positioning wall which is arranged on one side of at least one through hole and provides positioning for the at least one resistor.

11. The micro switch according to claim 9, characterized in that: The base forms at least one support column for supporting the connecting conductor.

12. The micro switch according to claim 11, characterized in that: The micro switch comprises an upper cover connected to the base, an operating member exposed to the upper cover, a movable block connected to the actuator and driven by the operating member, and a reset spring arranged on the base and connected to the movable block.

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