CN216487816U

CN216487816U - Micro-gap switch, micro-gap switch assembly structure and circuit breaker

Info

Publication number: CN216487816U
Application number: CN202121327468.3U
Authority: CN
Inventors: 杨安; 顾斌斌; 卢科军
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2022-05-10
Anticipated expiration: 2031-06-15

Abstract

The microswitch comprises a pin extending out of a shell and at least one positioning boss arranged on the shell and used for positioning a positioning hole or a positioning groove on a circuit board, wherein the free end of the pin and the positioning boss are protruded on the same side surface of the shell; the positioning boss is matched with the positioning hole of the circuit board in a positioning mode, so that the micro switch cannot fall off from the circuit board when large-batch machine welding is carried out, and the micro switch can be positioned reliably and stably while welding.

Description

Micro-gap switch, micro-gap switch assembly structure and circuit breaker

Technical Field

The utility model relates to the field of low-voltage electric appliances, in particular to a microswitch, a microswitch assembly structure and a circuit breaker.

Background

The microswitch is used as a simple and reliable switching-off component widely in various industries, particularly for the industry of low-voltage electric appliances, most circuit breakers with an automatic reclosing function carry out signal identification by means of switching of the microswitch arranged on a control circuit board. The design and the process have higher requirements on the position of the microswitch, the state of the circuit breaker can be wrongly identified by the circuit board due to slight deviation, and the traditional microswitch and the circuit board have no effective and simple measures for positioning.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a microswitch, a microswitch assembly structure and a circuit breaker.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a microswitch comprises a pin extending out of a shell and at least one positioning boss arranged on the shell and used for positioning a positioning hole or a positioning groove in a circuit board, wherein the free end of the pin and the positioning boss protrude out of the same side face of the shell.

Preferably, one end of the shell is provided with a rocker arm, the other end of the shell extends out of the rocker arm to form a pin, the side wall of one side of the shell is an installation side wall, after the pin extends out of the other end of the shell, the free end of the pin bends towards one side of the installation side wall, and the installation side wall is provided with the positioning boss.

Preferably, the shell is a hexahedron in the shape of a flat cuboid, the distance between the end face of the shell provided with the rocker arm and the end face extending out of the pins is the length of the micro switch, the distance between the installation side wall and the opposite side wall is the thickness of the micro switch, the distance between the other two opposite side walls of the hexahedron is the width of the micro switch, and the thickness of the micro switch is smaller than the length of the micro switch and smaller than the width of the micro switch.

Preferably, the positioning boss is one or more of a cylindrical boss, a triangular boss, a square boss, a long-strip-shaped boss, a polygonal boss or a cross.

Preferably, the end part of the positioning boss is provided with a guide inclined plane; and/or at least one clamping convex rib is arranged on the side wall of the positioning boss at intervals.

The utility model also provides a microswitch assembly structure, which comprises a circuit board and the microswitch, wherein the circuit board is provided with a welding hole matched with the pin of the microswitch and a positioning hole or a positioning groove matched with the positioning boss of the microswitch; the pins of the micro switch are inserted in the welding holes of the circuit board, the positioning bosses are inserted in the positioning holes or the positioning grooves, and the pins are welded with the welding holes.

Preferably, the plane of the swing arm of the microswitch is parallel to the plane of the circuit board.

The utility model also provides a circuit breaker, which comprises the microswitch assembling structure, wherein a microcontroller is also arranged on a circuit board of the microswitch assembling structure, and the microswitch is electrically connected with the microcontroller; when the circuit breaker is opened or closed, the operating mechanism or the handle or the electric operating mechanism of the circuit breaker directly or indirectly triggers the rocker arm of the microswitch.

Preferably, two microswitches are arranged on a circuit board of the microswitch assembly structure, and the two microswitches are respectively a first microswitch and a second microswitch; when the breaker is opened or closed, the operating mechanism or the handle of the breaker or the electric operating mechanism directly or indirectly triggers the rocker arm of the first microswitch, and when the breaker is released and opened, the operating mechanism or the handle of the breaker directly or indirectly triggers the second microswitch.

Preferably, the electric operating mechanism comprises a motor and a sliding block, a handle groove sleeved on the handle is formed in the sliding block, and the sliding block drives the handle to swing to realize automatic opening and closing when sliding linearly in a reciprocating manner; the motor rotates to drive the driving shaft to rotate through the gear set, and the eccentric rod arranged on the driving shaft drives the sliding block to slide linearly in a reciprocating manner; the state cam is connected with the driving shaft and is arranged opposite to the first microswitch; when the motor drives the breaker to switch on or switch off, the state cam rotates to a switch-on position or a switch-off position along with the driving shaft, and the protruding side of the state cam triggers or avoids the first microswitch.

According to the microswitch, the corresponding positioning bosses are arranged, the free ends of the pins and the positioning bosses are protruded on the same side surface of the shell, and the positioning bosses are matched with the positioning holes of the circuit board in a positioning mode, so that the microswitch cannot fall off from the circuit board when large-batch machine welding is carried out, the microswitch can be reliably and stably positioned while being welded, and displacement and unnecessary deviation of the microswitch when the microswitch is welded to the circuit board are prevented.

According to the circuit breaker, the circuit board and the assembly structure of the microswitch are matched with the positioning boss of the microswitch and the positioning hole or the positioning groove of the circuit board, so that the microswitch is prevented from being displaced when being welded on the circuit board; when the circuit breaker is opened or closed, an operating mechanism or a handle of the circuit breaker can accurately trigger a rocker arm of the microswitch, and the microswitch can be ensured to provide an accurate signal of the state of the circuit breaker.

Drawings

FIG. 1 is a schematic diagram of the construction of an embodiment of the microswitch of the present invention;

FIG. 2 is another schematic structural view of an embodiment of the microswitch of the present invention;

FIG. 3 is a schematic structural diagram of an embodiment of a circuit board of the present invention;

FIG. 4 is a schematic front view of the microswitch and circuit board assembly;

fig. 5 is a partial schematic view of the back side of the microswitch and circuit board assembly.

Detailed Description

The embodiments of the microswitch, the microswitch assembling structure and the circuit breaker of the utility model are further explained in the following with the embodiments given in the accompanying drawings. The scope of protection of the utility model is not limited to the description of the following examples.

As shown in fig. 1-2, the micro switch of the present embodiment includes a pin 12 extending out of a housing 13 for welding with a circuit board, and further includes a positioning boss 11 disposed on the housing 13 for positioning with a positioning hole 21 or a positioning slot on the circuit board, so as to facilitate automatic welding, and the free end of the pin 12 and the positioning boss 11 are both protruded from the same side of the housing 13.

As shown in fig. 1-2, in the micro switch 1 of the present embodiment, one end of the housing 13 is provided with the rocker 14, the other end of the housing 13 extends out of the pin 12, one side wall of the housing 13 is an installation side wall, after the pin 12 extends out of the other end of the housing 13, the free end of the pin 12 bends towards one side of the installation side wall, the installation side wall is provided with the positioning boss 11, the positioning boss 11 and the bending direction of the pin 12 are arranged on the same side, that is, the free end of the pin 12 and the positioning boss 11 protrude from the same side of the housing 13. The microswitch 1 is switched by pressing the rocker 14 to a normally closed loop, and is electrically connected with the outside through a pin 12 and used for providing an electric signal.

The microswitch 1 of the embodiment is used for being mounted on a circuit board 2, such as a circuit board 2 shown in fig. 3, a soldering hole 22 for soldering with the pin 12 and a positioning hole 21 matched with the positioning boss 11 are arranged on the circuit board 2, and the size of the positioning hole 21 is matched with that of the positioning boss 11. As shown in fig. 4, during assembly, the mounting side wall of the microswitch 1 is placed against the circuit board 2, the positioning boss 11 is inserted into the positioning hole 21 for positioning, the pin 12 is inserted into the soldering hole 22, and then the pin 12 is soldered with the soldering hole 22. As shown in fig. 5, the microswitch 1 is mounted on the front surface of the wiring board 2, and then the wiring board 2 is viewed from the back surface.

The microswitch 1 in the prior art is not provided with the positioning boss 11, so that the manual welding is usually carried out without problems, and the position can be manually adjusted. When a large number of machine automated welding is carried out, the circuit board 2 and the microswitch 1 can shift in the conveying process or the microswitch 1 can fall off from the circuit board 2 because a gap is usually formed between the pin 12 and the welding hole 22. When micro-gap switch 1 takes place the skew, the rocking arm 14 position of micro-gap switch 1 after the welding is not accurate enough, when it is used for cooperating the on-off state of feedback circuit breaker with the operating device of circuit breaker or other mechanisms, can lead to the operating device of circuit breaker can't touch micro-gap switch 1's rocking arm 14, and the error identification of circuit board 2 to the circuit breaker state will be caused to some deviation.

The microswitch 1 is provided with the corresponding positioning boss 11 to be positioned and matched with the positioning hole 21 of the circuit board 2, so that the microswitch 1 is ensured not to fall off from the circuit board 2 when large-scale machine welding is carried out, the microswitch can be reliably and stably positioned while welding is carried out, and displacement and unnecessary deviation are prevented when the microswitch 1 is welded on the circuit board 2. Meanwhile, the design is beneficial to improving the production process level and efficiency, reducing the cost, and being safe and reliable.

As shown in fig. 1-2, two positioning bosses 11 are provided on a mounting sidewall of the microswitch 1 of the present embodiment, the positioning bosses 11 are integrally formed with the housing 13, and the positioning bosses 11 are cylindrical bosses; two positioning holes 21 are correspondingly arranged on the circuit board 2, and the positioning holes 21 are round holes. Of course, the positioning boss 11 is not limited to a cylindrical boss, and may be one or more of a triangular square boss, a strip-shaped boss, a polygonal boss, a cross-shaped boss, and the like; the positioning bosses 11 are also not limited to two, and may be one or three or more. Correspondingly, the shape and the size of the positioning hole 21 on the circuit board 2 are matched with the positioning boss 11; the positioning hole 21 may also be a hole structure or a groove structure. Another alternative is: the positioning boss and the microswitch are designed in a split mode, a hole is formed in the microswitch shell, the positioning boss is inserted into the positioning hole, and finally the state shown in the figure 1-2 is formed.

Preferably, the positioning boss 11 is in interference fit with the positioning hole 21 to fix the microswitch 1 on the circuit board 2. Further, the end of the positioning boss 11 is further provided with a guiding inclined plane to facilitate the insertion of the positioning boss 11 into the positioning hole 21. Preferably, at least one clamping convex rib is arranged on the side wall of the positioning boss 11 at intervals, so that the positioning boss 11 and the positioning hole 21 can be tightly matched.

As shown in fig. 4-5, an embodiment of a microswitch assembly structure of the present invention includes the above-mentioned circuit board 2 and the microswitch 1 of the present invention, the circuit board 2 is provided with a solder hole 22 matching with the pin 12 of the microswitch 1, and a positioning hole 21 or a positioning slot matching with the positioning boss 11 of the microswitch 1, the pin 12 of the microswitch 1 is inserted into the solder hole 22 of the circuit board 2, the positioning boss 11 is inserted into the positioning hole 21 or the positioning slot, and the pin 12 is welded with the solder hole 22. The positioning boss 11 of the microswitch 1 and the free end of the pin 12 are positioned on the same side and are synchronously inserted into the welding hole 22 and the positioning hole 21, and the circuit board 2 is automatically welded by a machine after being accurately positioned by the matching of the positioning boss 11 and the positioning hole 21.

Preferably, the installation lateral wall that micro-gap switch 1 was equipped with location boss 11 is the lateral wall of perpendicular to micro-gap switch 1 thickness direction, and micro-gap switch 1's pin 12 and rocking arm 14 set up respectively at micro-gap switch 1 length direction's both ends to the free end of pin 12 is to being equipped with the installation lateral wall lateral buckling of location boss 11, makes the whole height of installing circuit board 2 of micro-gap switch 1 minimum like this, is favorable to reducing the volume of product. Preferably, the plane on which the rocker 14 swings is parallel to the plane on which the circuit board 2 lies. Specifically, shell 13 is the hexahedron of flat cuboid form, the distance that shell 13 was equipped with between the terminal surface of rocking arm 14 and the terminal surface that stretches out pin 12 is micro-gap switch's length, and installation lateral wall and rather than the distance between the relative lateral wall be micro-gap switch's thickness, the distance between two other relative lateral walls of hexahedron be micro-gap switch's width, micro-gap switch's thickness is less than micro-gap switch's length, and is less than micro-gap switch's width, through locating boss 11 and pin 12's free end setting in the side that leans on the thickness direction for the size of installation is minimum.

In this embodiment, two microswitches 1 are disposed on the circuit board 2, and it is obvious that one or three or more microswitches 1 may be mounted on the circuit board 2 as required.

The utility model also provides an embodiment of the circuit breaker, the circuit breaker comprises a circuit board 2 which is provided with a micro switch 1 and is shown in figures 4-5, a microcontroller is also arranged on the circuit board 2, the micro switch 1 is electrically connected with the microcontroller through a printed circuit on the circuit board, and the opening and closing state of the circuit breaker is fed back; when the circuit breaker is opened or closed, an operating mechanism or a handle of the circuit breaker directly or indirectly triggers a rocker 14 of the microswitch 1 to indicate opening or closing; when the rocker 14 of the corresponding microswitch 1 is not triggered, it indicates closing or opening. For example, when the circuit breaker is opened, the operating mechanism or the handle of the circuit breaker directly or indirectly triggers the rocker 14 of the microswitch 1, so that the normally-open normally-closed loop of the microswitch 1 is switched, and the circuit breaker is opened; when the circuit breaker is switched on, an operating mechanism or a handle of the circuit breaker is far away from the rocker arm 14 of the microswitch 1, so that the microswitch 1 is reset to indicate that the circuit breaker is switched on. Of course, the rocker 14 of the microswitch 1 may be triggered during closing to indicate that the circuit breaker is closed; when opening, the rocker 14 far from the microswitch 1 indicates that the circuit breaker is open.

Further, be equipped with two micro-gap switches 1 on the circuit board 2, two micro-gap switches 1 are first micro-gap switch and second micro-gap switch respectively, and when circuit breaker separating brake or combined floodgate, the operating device of circuit breaker or handle directly or indirectly triggered first micro-gap switch's rocking arm 14, and when circuit breaker dropout separating brake, the operating device of circuit breaker or handle directly or indirectly triggered second micro-gap switch. When the circuit breaker is switched on, the operating mechanism or the handle of the circuit breaker does not trigger the first microswitch and the second microswitch, and is far away from the rocker 14 of the microswitch 1 to indicate that the circuit breaker is switched on; when the breaker is opened, an operating mechanism or a handle of the breaker directly or indirectly triggers the first microswitch and the second microswitch to indicate that the breaker is opened; when the circuit breaker is tripped and opened, the operating mechanism or the handle of the circuit breaker directly or indirectly triggers the second microswitch, does not trigger the first microswitch, represents the tripping and opening, and can provide different state signals of the closing, opening and tripping of the circuit breaker.

The circuit breaker comprises a handle and an operating mechanism, wherein the handle drives a moving contact in the circuit breaker to be matched with a fixed contact through the operating mechanism, so that the opening and closing of the circuit breaker are realized; when the circuit breaker has faults of overload, short circuit, electric leakage and the like, the protection mechanism triggers the operating mechanism to release, so that the circuit breaker releases and opens. Preferably, the circuit breaker further comprises an electric operating mechanism for driving the circuit breaker to automatically switch on and off, and when the circuit breaker is switched off or switched on, the operating mechanism or the handle of the circuit breaker or the electric operating mechanism directly or indirectly triggers the rocker 14 of the microswitch 1. In the embodiment, the microswitch 1 is triggered by an electric operating mechanism, the electric operating mechanism comprises a motor and a sliding block, a handle groove sleeved on a handle is arranged on the sliding block, the sliding block is installed in a reciprocating linear sliding mode, and the automatic opening and closing is realized by driving the handle to swing; the motor rotates to drive the driving shaft to rotate through the gear set, and the eccentric rod arranged on the driving shaft drives the sliding block to slide linearly in a reciprocating manner; the state cam is connected with the driving shaft and is arranged above the circuit board 2 and opposite to the first microswitch, the motor is arranged below the circuit board 2, and one end of the driving shaft penetrates through a driving shaft hole in the circuit board 2 and extends to the upper part of the circuit board 2; when the motor drives the breaker to switch on or switch off, the state cam rotates to a switch-on position or a switch-off position along with the driving shaft, and the convex side of the state cam triggers or avoids the first microswitch to indicate that the breaker is in a switch-on or switch-off state; when the circuit breaker is tripped, the operating mechanism drives the second microswitch through the transmission rod, and the circuit breaker is tripped at the moment.

Preferably, the circuit board 2 is further provided with a communication interface, the communication interface is connected with the microcontroller, and the circuit breaker transmits a state signal of the circuit breaker to the outside of the circuit breaker through the communication interface.

Preferably, the circuit board 2 is further provided with a circuit board positioning protrusion 23 and/or a circuit board positioning slot 24 which are/is matched with the circuit breaker shell in a positioning manner.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims

1. A microswitch comprising a pin (12) which protrudes outside a housing (13), characterized in that: the circuit board is characterized by further comprising at least one positioning boss (11) arranged on the shell (13) and used for positioning a positioning hole or a positioning groove in the circuit board, and the free end of the pin (12) and the positioning boss (11) are protruded to be located on the same side face of the shell (13).

2. The microswitch of claim 1, wherein: one of shell (13) is served and is equipped with rocking arm (14), and the other end stretches out pin (12), and one side lateral wall of shell (13) is the installation lateral wall, pin (12) stretch out the back from shell (13) other end, and its free end is to installation lateral wall one side buckling be equipped with on the installation lateral wall location boss (11).

3. The microswitch of claim 2, wherein: the utility model discloses a novel micro-gap switch, including shell (13), distance between the terminal surface that shell (13) was equipped with rocking arm (14) and the terminal surface that stretches out pin (12) is micro-gap switch's length, and the distance between installation lateral wall and rather than the relative lateral wall is micro-gap switch's thickness, and the distance between two other relative lateral walls of hexahedron is micro-gap switch's width, micro-gap switch's thickness is less than micro-gap switch's length, and is less than micro-gap switch's width.

4. A microswitch according to any one of claims 1 to 3, wherein: the positioning boss (11) is one or more of a cylindrical boss, a triangular boss, a square boss, a long-strip-shaped boss, a polygonal boss or a cross.

5. The microswitch of claim 1, wherein: the end part of the positioning boss (11) is provided with a guide inclined plane; and/or at least one clamping convex rib is arranged on the side wall of the positioning boss (11) at intervals.

6. A micro-gap switch assembly structure which is characterized in that: the microswitch comprises a circuit board (2) and at least one microswitch (1) as in any one of claims 1-5, wherein the circuit board (2) is provided with a welding hole (22) matched with a pin (12) of the microswitch (1) and a positioning hole (21) or a positioning groove matched with a positioning boss (11) of the microswitch (1); the pins (12) of the microswitch (1) are inserted into the welding holes (22) of the circuit board (2), the positioning bosses (11) are inserted into the positioning holes (21) or the positioning grooves, and the pins (12) are welded with the welding holes (22).

7. A microswitch mounting structure according to claim 6, wherein: the plane where the rocker arm (14) of the microswitch (1) swings is parallel to the plane where the circuit board (2) is located.

8. A circuit breaker, characterized by: the microswitch assembly structure comprises the microswitch assembly structure as in claim 6 or 7, wherein a microcontroller is further arranged on a circuit board (2) of the microswitch assembly structure, and the microswitch (1) is electrically connected with the microcontroller; when the circuit breaker is opened or closed, an operating mechanism or a handle or an electric operating mechanism of the circuit breaker directly or indirectly triggers a rocker (14) of the microswitch (1).

9. A circuit breaker according to claim 8, wherein: two micro switches (1) are arranged on a circuit board (2) of the micro switch assembly structure, and the two micro switches (1) are respectively a first micro switch and a second micro switch; when the circuit breaker is opened or closed, the operating mechanism or the handle or the electric operating mechanism of the circuit breaker directly or indirectly triggers the rocker arm (14) of the first microswitch, and when the circuit breaker is opened or closed, the operating mechanism or the handle of the circuit breaker directly or indirectly triggers the second microswitch.

10. A circuit breaker according to claim 9, wherein: the electric operating mechanism comprises a motor and a sliding block, a handle groove sleeved on the handle is formed in the sliding block, and the sliding block drives the handle to swing to realize automatic opening and closing when sliding linearly in a reciprocating manner; the motor rotates to drive the driving shaft to rotate through the gear set, and the eccentric rod arranged on the driving shaft drives the sliding block to slide linearly in a reciprocating manner; the state cam is connected with the driving shaft and is arranged opposite to the first microswitch; when the motor drives the breaker to switch on or switch off, the state cam rotates to a switch-on position or a switch-off position along with the driving shaft, and the protruding side of the state cam triggers or avoids the first microswitch.