CN210837612U - Electromagnetic switch - Google Patents

Abstract

The utility model relates to the technical field of switches, concretely relates to electromagnetic switch. The trip mechanism is movably arranged on the shell; the tripping mechanism is arranged on the shell relative to the kick mechanism, can move relative to the shell and comprises a bridge plate positioned on the moving path of the kick mechanism, and the bridge plate is provided with a plurality of locking states, unlocking states and critical states which are converted from the locking states to the unlocking states; when the kick mechanism moves downwards, the kick mechanism is abutted against the bridge plate and pushes the bridge plate to move to a locking state, the kick mechanism continues to move to drive the tripping mechanism to move to a critical state, the kick mechanism stores energy, and the energy storage enables the kick mechanism to move suddenly to connect a circuit when the kick mechanism is in an unlocking state. The electromagnetic switch is switched on due to the release energy of the energy storage of the kick mechanism, and the interference of human factors is avoided, so that the switch is switched on more reliably.

Description

Electromagnetic switch

Technical Field

The utility model relates to the technical field of switches, concretely relates to electromagnetic switch.

Background

An electromagnetic switch, as the name implies, is a switch controlled by an electromagnet, i.e. a combination of an electromagnet and a switch. When the electromagnet coil is electrified, electromagnetic attraction is generated, the movable iron core pushes or pulls the switch contact to be closed, and therefore the controlled circuit is switched on. Electromagnetic switches are widely used in various industries.

In the prior art, for example, chinese patent document CN110491694A discloses an electromagnetic switch, which includes a housing, an electromagnetic assembly, a contact mechanism, and an armature, wherein two spring buttons are connected in parallel to the housing, and a snap-action mechanism for providing resistance at an initial stage of pressing the first button is disposed inside the first button. According to the electromagnetic switch, the snap-through mechanism is arranged on the spring button above the electromagnetic assembly, and when the pressing force of the button is insufficient, the spring button cannot move downwards, so that the electromagnetic assembly cannot generate suction force, and the contact cannot be in a state similar to open or close; only when the button is pressed down with enough force to overcome the resistance of the kick mechanism, the button can move downwards, and once the button breaks through the resistance of the kick mechanism, the kick mechanism can not generate resistance to the button any more, at the moment, due to the inertia effect, the spring button can be quickly pressed to the bottom once, so that the contact is switched on, and the arc discharge phenomenon is effectively avoided. The electromagnetic switch of this patent document requires a force sufficient to overcome the resistance of the kick mechanism to turn on the button when the button is pressed down, and requires a large force to press the button.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the electromagnetic switch among the prior art and pressing hard defect to provide a laborsaving electromagnetic switch that can make the contact effectively switch on.

In order to solve the above problems, the electromagnetic switch of the present invention comprises a housing, a kick mechanism and a tripping mechanism, wherein the kick mechanism is movably disposed on the housing; the tripping mechanism is arranged on the shell relative to the kick mechanism, can move relative to the shell and comprises a bridge plate positioned on the moving path of the kick mechanism, and the bridge plate is provided with a plurality of locking states, unlocking states and critical states of converting the locking states into the unlocking states; when the kick mechanism moves downwards, the kick mechanism is abutted against the bridge plate and pushes the bridge plate to move to the locking state, the kick mechanism continues to move to drive the tripping mechanism to move to the critical state, the kick mechanism stores energy, and the energy storage enables the kick mechanism to move in a kick mode to connect a circuit in the unlocking state.

The kick mechanism comprises a kick body, a top rod fixedly arranged on the kick body and a kick rod connected with the kick body through a kick biasing member; the tripping mechanism further comprises a first tripping frame positioned on the moving path of the ejector rod, the bridge plate is arranged on the moving path of the jump rod, and when the first tripping frame is abutted against the bridge plate, the bridge plate is positioned in a first locking state; when the kick mechanism moves downwards, the kick rod is abutted against the bridge plate and pushes the bridge plate to move to the first locking state, the kick mechanism continues to move, the ejector rod can drive the first tripping frame to move, the kick biasing member stores energy when the kick mechanism moves to the critical state, and the energy storage enables the kick rod to move in a kick mode to connect a circuit when the kick mechanism moves to the unlocking state.

The top rod is fixedly arranged in the middle of the kick body, the kick rod is sleeved on the top rod, the kick biasing member is a kick spring, the kick spring is sleeved on the top rod, one end of the kick spring is abutted against the kick rod, and the other end of the kick spring is abutted against the kick body.

The kick rod comprises a cylindrical connecting end sleeved with the ejector rod and an abutting end extending downwards along the side wall of the cylindrical connecting end, and the kick spring is arranged in the barrel of the cylindrical connecting end.

The ejector rod is connected with the kick body through threads or riveting.

The ejector rod and the kick body are integrally formed, and a plurality of guide bulges are arranged at the end part of the ejector rod, which is far away from the kick body; the jump rod is provided with a plurality of guide holes for the guide bulges to pass through and a support surface which is abutted against the guide bulges after the mandril rotates for a set angle.

The first tripping frame and the bridge plate are rotatably mounted on the shell through pins respectively.

The upper surface of bridge plate has first cambered surface, and with the second cambered surface that first cambered surface ladder is connected, first cambered surface is located and is close to one side of second cambered surface, the height of first cambered surface is higher than the second cambered surface, the ladder face of first cambered surface and second cambered surface is first locking face, the one end of first trip frame removes and can the joint in first cambered surface and second cambered surface on the first locking face.

The jump body is a first button arranged on the shell, a second button arranged in parallel with the first button is further arranged in the shell, one end of a second tripping frame of the tripping mechanism is located on a moving path of the second button, after a circuit is communicated, the second tripping frame is abutted to the bridge plate to enable the bridge plate to be in a second locking state, and the second button presses the second tripping frame to move to a critical state and then continuously moves to enable the bridge plate to be in an unlocking state.

The second tripping frame and the first tripping frame are rotatably mounted on the shell through the same pin, a buckling surface locked with the bridge plate is arranged on the second tripping frame, a stepped second locking surface is arranged on the bridge plate, and the bridge plate is in the second locking state after the buckling surface is attached to the second locking surface.

The second tripping frame is connected with the first tripping frame through a torsion spring, and when the first tripping frame is driven by the ejector rod to rotate in the second locking state, the torsion force borne by the second tripping frame is increased.

The tripping mechanism is characterized by further comprising a base body used for arranging the tripping mechanism, the base body is fixedly arranged in the shell, two pairs of mounting holes which are arranged in a ladder shape are formed in the base body, and two ends of the two pins are respectively arranged in the corresponding mounting holes.

The electromagnetic component is arranged corresponding to the first button; one end of the armature is positioned between the electromagnetic assembly and the kick mechanism, and the other end of the armature is rotatably connected to the electromagnetic assembly or the shell through a tension spring and can be driven by the kick rod to move towards the electromagnetic assembly so as to be connected with the electromagnetic assembly; the contact mechanism is arranged corresponding to the second button and comprises a movable contact frame, one end of the bridge plate extends into the movable contact frame, the upper end of the movable contact frame is positioned on the moving path of the second button, and the bridge plate drives the movable contact frame to move so as to connect a circuit.

The abutting end of the jump rod comprises a bridge plate abutting end abutting against the bridge plate and an armature abutting end abutting against the armature, and the height of the bridge plate abutting end is smaller than that of the armature abutting end.

The second button comprises a first pressing end abutted with the second tripping frame and a second pressing end arranged in parallel with the first pressing end and abutted with the upper end of the movable contact frame.

The utility model discloses technical scheme has following advantage:

1. the utility model discloses an electromagnetic switch, which comprises a shell, a kick mechanism and a tripping mechanism, wherein the kick mechanism is movably arranged on the shell; the tripping mechanism is arranged on the shell relative to the kick mechanism, can move relative to the shell and comprises a bridge plate positioned on the moving path of the kick mechanism, and the bridge plate is provided with a plurality of locking states, unlocking states and critical states of converting the locking states into the unlocking states; when the kick mechanism moves downwards, the kick mechanism is abutted against the bridge plate and pushes the bridge plate to move to the locking state, the kick mechanism continues to move to drive the tripping mechanism to move to the critical state, the kick mechanism stores energy, and the energy storage enables the kick mechanism to move in a kick mode to connect a circuit in the unlocking state. The energy storage of the kick mechanism enables the kick mechanism and the tripping mechanism to rapidly act to connect the circuit, so that the circuit can be effectively connected and rapidly connected, the on-off state is avoided, the arc discharge phenomenon is effectively avoided, and the service life of the electromagnetic switch is prolonged; and the electromagnetic switch is switched on due to the release energy of the energy storage of the kick mechanism, and the interference of human factors is avoided, so that the switch is switched on more reliably.

2. The utility model discloses an electromagnetic switch, ejector pin, abrupt jumper and abrupt jump spring's setting, simple structure is stable, convenient processing and manufacturing.

3. The utility model discloses an electromagnetic switch, ejector pin with jump body screw thread or riveting are connected, and the connected mode is simple and convenient, and to the connection stability more of jump rod.

4. The utility model discloses an electromagnetic switch, after the intercommunication circuit, the second trip frame with the bridge plate butt makes the bridge plate is in second locking state, can make the electromagnetic switch stable keep at the on-state.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded view of a kick mechanism according to a first embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a kick mechanism according to a first embodiment of the present invention;

FIG. 3 is a perspective view of a pogo stick according to a first embodiment of the present invention;

fig. 4 is an exploded view of a kick mechanism according to a second embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of a kick mechanism according to a second embodiment of the present invention;

fig. 6 is a schematic structural diagram of a perspective view of a first button according to a second embodiment of the present invention;

fig. 7 is a first perspective view of a jump rod according to a second embodiment of the present invention;

fig. 8 is a second perspective view of the pogo stick according to the second embodiment of the present invention;

fig. 9 is a perspective view of a panel of the present invention;

fig. 10 is a schematic cross-sectional view of the panel of the present invention;

fig. 11 is a schematic structural view of an explosion diagram at a panel of the present invention;

fig. 12 is a schematic structural view of a perspective view of a first trip frame according to the present invention;

fig. 13 is a schematic structural view of a front view of a first trip frame according to the present invention;

fig. 14 is a schematic structural view of a perspective view of a second trip frame according to the present invention;

fig. 15 is a schematic view of a connection structure of the first trip frame and the second trip frame of the present invention;

fig. 16 is a schematic structural view of a perspective view of a bridge plate according to the present invention;

fig. 17 is a first schematic structural diagram of a top view of the bridge plate, the first trip frame and the second trip frame of the present invention;

fig. 18 is a second schematic structural view of a perspective view of the bridge plate, the first trip frame and the second trip frame of the present invention;

fig. 19 is a schematic structural view of a perspective view of an electromagnetic assembly of the present invention;

fig. 20 is a schematic structural view of a perspective view of the electromagnetic assembly and contact mechanism of the present invention;

fig. 21 is a schematic structural view of a cross-sectional view at the contact mechanism of the present invention;

FIG. 22 is a schematic structural view taken along the line C-C in FIG. 21;

FIG. 23 is a schematic structural view taken along line D-D in FIG. 21;

fig. 24 is a schematic perspective view of the moving contact holder;

FIG. 25 is a schematic perspective view of a stationary contact set;

fig. 26 is a schematic structural view of a cross-sectional view of an initial state of the electromagnetic switch;

fig. 27 is a schematic structural view in cross section of a first locked state of the trip mechanism;

FIG. 28 is a schematic structural view in cross section of a critical state at the first trip frame;

fig. 29 is a schematic structural view in cross section of a second locked state of the trip mechanism;

FIG. 30 is a schematic structural view in cross section of a critical state at the second trip frame;

fig. 31 is a schematic structural view of a cross-sectional view of the electromagnetic switch after the trip mechanism trips and when the trip mechanism is in a second locked state;

fig. 32 is a schematic structural diagram of a cross-sectional view of the electromagnetic switch with the first button released and the trip mechanism in the second locked state;

fig. 33 is a schematic diagram of a cross-sectional view of the electromagnetic switch with the trip mechanism in a critical state with the second button pressed;

description of reference numerals:

1-a shell; 2-a first button; 3-a second button; 4-an electromagnetic assembly; 5-a coil; 6-iron core; 7-an armature; 8-moving contact head frame; 9-a first elastic member; 10-a first set of moving contacts; 11-a first set of stationary contacts; 12-a second set of moving contacts; 13-a second set of stationary contacts; 14-brake static contact group; 17-a kick body; 18-a panel; 19-a second elastic member; 20-a third elastic member; 23-a return spring; 24-a top rod; 25-a barrel connection end; 26-pogo stick; 27-snap spring; 28-tension spring; 29-a guide projection; 30-a guide hole; 31-a support surface; 32-bridge plate; 33-a first trip frame; 34-a first cambered surface; 35-a second arc surface; 36-a first locking surface; 37-a first locking end; 38-a second trip frame; 39-a second locking surface; 40-buckling surface; 41-torsion spring; 42-pin; 43-a bridge plate abutment end; 44-armature abutment end; 45-a first pressing end; 46-a second pressing end; 47-seat body.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 33, the electromagnetic switch of the present embodiment includes a housing 1, a first button 2, a second button 3, a trip mechanism, an electromagnetic assembly 4, an armature 7, and a contact mechanism, which are disposed in the housing 1.

The housing 1 may include a panel 18 and a base, the panel 18 being fixedly connected to the base by plugging.

The first button 2 and the second button 3 are arranged on the panel 18 in parallel, a return spring 23 is connected between the first button 2 and the second button 3 and the panel 18, and the first button 2 and the second button 3 can be restored to an initial state without being pressed by the return force of the return spring 23 after being pressed.

The kick mechanism is movably arranged on the housing 1. As shown in fig. 1 to 8, the kick mechanism includes a kick body 17, a push rod 24 fixedly disposed on the kick body 17, and a kick lever 26 connected to the kick body 17 through a kick biasing member. The jump rod 26 is sleeved on the top rod 24, the jump biasing member is a jump spring 27, the jump spring 27 is sleeved on the top rod 24, one end of the jump spring is abutted against the jump rod 26, and the other end of the jump spring is abutted against the jump body 17.

In this embodiment, as shown in fig. 1 to fig. 3, the ejector rod 24 is connected to the snap-through body 17 through a screw thread or riveting, a hole for the ejector rod 24 to pass through is formed in the snap-through rod 26, and after the snap-through spring 27 is connected to the snap-through rod 26, the ejector rod 24 passes through the hole and is connected to the snap-through body 17 through a screw thread or riveting.

As an alternative embodiment, as shown in fig. 4-8, the ejector rod 24 is integrally formed with the jump body 17, and the end of the ejector rod 24 away from the jump body 17 is provided with a plurality of guide protrusions 29; the pogo pin 26 is provided with a plurality of guide holes 30 through which the plurality of guide bosses 29 pass, and a support surface 31 which abuts against the guide bosses 29 after the carrier rod 24 is rotated by a set angle. After the kick spring 27 is connected with the kick rod 26, the guide boss 29 corresponds to the guide hole 30, the ejector rod 24 rotates for a set angle after passing through the guide hole 30, and the guide boss 29 is connected with the support surface 31 in an abutting mode through the kick spring 27. Of course, in order that the guide projection 29 does not move out of the support surface 31, it is also possible to provide a blocking projection that prevents the guide projection 29 from moving out, or to provide the support surface 31 with an angle. In the present embodiment, two guide projections 29 and two guide holes 30 are provided.

As shown in fig. 3 and 8, the trip bar 26 includes a tubular connection end 25 sleeved with the ejector rod 24, and an abutting end extending downward along a sidewall of the tubular connection end 25, and the trip spring 27 is provided in a tube of the tubular connection end 25. The abutment end of the trip bar 26 comprises a bridge abutment end 43 abutting the bridge 32 and an armature abutment end 44 abutting the armature 7, the height of the bridge abutment end 43 being smaller than the height of the armature abutment end 44.

In this embodiment, when the kick mechanism is used for an electromagnetic switch, the kick body 17 is the first button 2, and when the kick mechanism is mounted in another device, it may be another member that is pressed and moved.

As shown in fig. 33, the second push button 3 includes a first pressing end 45 abutting against the second trip frame 38, and a second pressing end 46 abutting against the movable contact frame 8, which is provided in parallel with the first pressing end 45.

As shown in fig. 12-20, the trip mechanism is disposed on the housing 1 opposite to the kick mechanism, and is movable relative to the housing 1, and includes a bridge plate 32, a first trip frame 33, and a second trip frame 38. The bridge plate 32 and the first trip frame 33 are located on the moving path of the kick mechanism, the second trip frame 38 is located on the moving path of the second button 3, and the bridge plate 32 has a plurality of locked states, unlocked states, and critical states for changing from the locked states to the unlocked states.

In this embodiment, the first trip frame 33, the second trip frame 38 and the bridge plate 32 are rotatably mounted on the housing 1 through pins 42, wherein the first trip frame 33 and the second trip frame 38 are disposed on the same pin, the two pins 42 are disposed in parallel, and the first trip frame 33 and the second trip frame 38 are disposed on the upper side of the bridge plate 32. One end of the first trip frame 33 is located on the moving path of the plunger 24, one end of the bridge plate 32 on the same side as the plunger 24 is located on the moving path of the trip bar 26, the other end of the bridge plate 32 extends into the movable contact holder 8 of the contact mechanism, and one end of the second trip frame 38 is located on the moving path of the second button 3. When the first trip frame 33 abuts against the bridge plate 32, the bridge plate 32 is in a first locking state; when the second trip frame 38 abuts the bridge plate 32, the bridge plate 32 is in a second locked state.

In this embodiment, as shown in fig. 16, 27 and 28, the upper surface of the bridge plate 32 has a first arc surface 34, and a second arc surface 35 connected to the first arc surface 34 in a stepped manner, the first arc surface 34 is close to one side of the second arc surface 35, the height of the first arc surface 34 is higher than that of the second arc surface 35, the stepped surfaces of the first arc surface 34 and the second arc surface 35 are first locking surfaces 36, one end of the first trip frame 33 moves on the first arc surface 34 and the second arc surface 35 and can be clamped on the first locking surfaces 36, and when the first locking surfaces 36 are clamped with one end of the first trip frame 33, the bridge plate 32 is in a first locking state. As shown in fig. 26, 27, and 32, in an initial state, one end of the first trip frame 33 is located on the second arc surface 35, when the first trip frame is located in the first locking state, the one end of the first trip frame 33 is in clamping connection with the first locking surface 36, and when the first trip frame is located in the second locking state, the one end of the first trip frame 33 is located on the first arc surface 34.

As shown in fig. 14, 15, 29 and 30, the second trip frame 38 is disposed parallel to the first trip frame 33, and is connected between the second trip frame 38 and the first trip frame 33 by a torsion spring 41. In the second locked state, when the first trip frame 33 is driven by the carrier rod 24 to rotate, the torsion force applied to the second trip frame 38 increases, and the locking force of the second trip frame 38 and the bridge plate 32 increases. The second trip frame 38 is provided with a buckling surface 40 locked with the bridge plate 32, the bridge plate 32 is provided with a second locking surface 39 in a step shape, and the bridge plate 32 is in the second locking state after the buckling surface 40 is attached to the second locking surface 39. In a second locking state, one end of the second trip frame 38 is arranged close to the armature 7 and can be driven by the armature 7 to rotate, so that the locking with the bridge plate 32 is released; the other end of the second trip frame 38 is located on the moving path of the second button 3.

In this embodiment, as shown in fig. 17 and 18, the trip mechanism is disposed on a seat body 47, the seat body 47 is fixedly installed in the housing 1, two pairs of installation holes are formed in the seat body 47, and two ends of the two pins 42 are respectively installed in the corresponding installation holes.

The setting position of the tripping mechanism can be set according to the use requirement, such as directly setting on the housing 1, or setting on the seat body 47.

As shown in fig. 19, 20 and 26, the solenoid assembly 4 is disposed corresponding to the first push button 2, below the first push button 2, and opposite to the first push button 2. The electromagnetic assembly 4 comprises a coil 5 and an iron core 6 arranged in the coil 5, and when the coil 5 is electrified, the iron core 6 can generate magnetic force, so that the armature 7 can be adsorbed and the adsorption state can be maintained.

One end of the armature 7 is located between the electromagnetic component 4 and the kick mechanism, and the other end is rotatably connected to the electromagnetic component 4 or the housing 1 through a tension spring 28, and can be driven by the kick rod 26 to move towards the electromagnetic component 4 so as to be connected with the iron core 6 of the electromagnetic component 4. As shown in fig. 20, 26, 31, and 32, when the first push button 2 is not pushed, one end of the armature 7 is tilted toward the first push button 2. When the first pushbutton 2 is pressed, the armature 7 is pressed downwards by the trip lever 26, so that the armature 7 rotates and approaches the core 6 of the solenoid assembly 4 and is connected to the core 6. When the armature 7 is not loaded and adsorbed, the armature 7 is tilted towards the first button 2 by the pulling of the tension spring 28, and the end of the second trip frame 38 close to the armature 7 is driven to rotate upwards.

The housing 1 has therein a contact mechanism arranged in parallel with the electromagnetic assembly 4, as shown in fig. 20, 26, 31-33, which is arranged below the second push button 3 and opposite to the second push button 3. The contact mechanism includes a movable contact frame 8 and a fixed contact group, referring to fig. 21-25, the movable contact frame 8 is disposed in the housing 1 in a vertically sliding manner, the fixed contact group is fixedly connected in the housing 1, an upper end of the movable contact frame 8 is connected to the housing 1 through a first elastic member 9, the first elastic member 9 may be a spring, and the movable contact frame 8 may be moved to a bottom end position through the first elastic member 9, so that the movable contact group in the movable contact frame 8 is separated from or connected to a part of the fixed contact group. The upper end of the moving contact holder 8 is located on the moving path of the second button 3, the top end of the moving contact holder 8 can also be contacted with the second button 3, and when the second button 3 is pressed downwards, the moving contact holder 8 can move downwards. One end of the bridge plate 32 extends into the moving contact frame 8, and when the bridge plate 32 rotates, one end of the bridge plate 32 can tilt the moving contact frame 8 towards the direction close to the second button 3, so that the separation or connection state of the moving contact group and the static contact group in the moving contact frame 8 is changed.

The movable contact frame 8 is internally provided with: the contact device comprises a first movable contact group 10 and a second movable contact group 12, wherein the first movable contact group 10 is electrically connected with the second movable contact group 12; the lower part of the first movable contact group 10 is elastically connected with the movable contact frame 8 through a second elastic piece 19, the first movable contact group 10 has a biasing force moving towards the upper part through the second elastic piece 19, and when the movable contact frame 8 slides upwards, the first movable contact group 10 can be contacted with the first fixed contact group 11 at the upper end so as to keep electric connection; when the movable contact frame 8 slides downwards, the first movable contact group 10 can be contacted with the lower brake fixed contact group 14, so that the electric connection is maintained; the lower part of the second moving contact group 12 is elastically connected with the moving contact frame 8 through a third elastic piece 20, the second moving contact group 12 has a biasing force moving towards the upper part through the third elastic piece 20, and when the moving contact frame 8 slides upwards, the second moving contact group 12 can be contacted with the upper second fixed contact group 13, so that the electric connection is maintained.

The stationary contact group is for fixing in casing 1 to constitute a cavity that can hold the moving contact by a plurality of stationary contact groups, include: the first fixed contact group 11, the second fixed contact group 13 and the braking fixed contact group 14 are arranged at the upper end of the cavity, and after the movable contact frame 8 is inserted between the fixed contact groups, the first fixed contact group 11 and the second fixed contact group 13 are positioned on one side of the movable contact group close to the second button 3; and the braking static contact group 14 is arranged at the lower end of the cavity, namely at the side of the moving contact group far away from the second button 3.

The braking fixed contact group 14 and the first fixed contact group 11 share one moving contact group, when the moving contact frame 8 is elastically pressed at the lower position by the first elastic piece 9, the first moving contact group 10 and the second moving contact group 12 are both moved to the lower end position, and at the moment, a gap is formed between the first moving contact group 10 and the first fixed contact group 11, and the first moving contact group 14 is electrically contacted with the braking fixed contact group; the second movable contact group 12 and the second stationary contact group 13 are also spaced apart, i.e., disconnected.

The first movable contact group 10, the second movable contact group 12, the first fixed contact group 11, the second fixed contact group 13 and the braking fixed contact group 14 are provided with two symmetrical electrical contacts, wherein the two electrical contacts of the braking fixed contact group 14 are respectively used for being electrically connected with two terminals of the driving motor, when the two electrical contacts of the braking fixed contact group 14 are connected, the two terminals of the driving motor can be short-circuited, and therefore instantaneous armature current generated by the rotation of the driving motor can be offset. The two electrical contacts of the first moving contact group 10, the second moving contact group 12, the first fixed contact group 11 and the second fixed contact group 13 may be two electrical contacts which are symmetrical and electrically connected to each other.

After the moving contact frame 8 tilts upwards and the moving contact frame 8 moves upwards against the elastic force of the first elastic piece 9, in the moving contact frame 8, the first moving contact group 10 and the second moving contact group 12 move upwards along with the moving upwards, so that the first moving contact group 10 is separated from the brake fixed contact group 14, then the first moving contact group 10 is contacted with the first fixed contact group 11 to form electric connection, and the second moving contact group 12 is also contacted with the second fixed contact group 13 to form electric connection; since the first movable contact group 10 is electrically connected to the second movable contact group 12, this action electrically connects the first stationary contact group 11 to the second stationary contact group 13.

The lower end of the first moving contact group 10 is connected with the moving contact frame 8 through the second elastic piece 19. In the free state that the electromagnetic assembly 4 is not electrified, the movable contact frame 8 is pushed to move to the lowest end position under the action of the first elastic piece 9, the first movable contact group 10 also moves downwards along with the first movable contact group, and the first movable contact group 10 keeps a distance with the first fixed contact group 11 and keeps contact with the brake fixed contact group 14.

The lower end of the second moving contact group 12 is connected with the moving contact frame 8 through a third elastic member 20. In the free state in which the electromagnetic assembly 4 is not energized, the movable contact holder 8 is pushed and moved to the lowermost position by the first elastic member 9, and the second movable contact group 12 is also moved downward, while the second movable contact group 12 is spaced apart from the second fixed contact group 13.

The operation of the electromagnetic switch is shown in fig. 26-33:

when the first button 2 is pressed downwards, the jump rod 26 moves downwards, the bridge abutting end 43 abuts against the bridge 32 to push the bridge 32 to rotate, when the bridge 32 rotates to abut against the bridge 32 and the first trip frame 33, the bridge 32 is in the first locking state, and the jump rod 26 does not move any more. At this time, the first button 2 is continuously pressed downwards, the kick spring 27 starts to store energy, when the first button 2 moves to the top rod 24 to be abutted against the first trip frame 33, the first trip frame 33 rotates, the first locking end 37 of the first trip frame 33 gradually moves relative to the first locking surface 36 until the first trip frame moves to a critical state, and the kick spring 27 is in an energy storage state; when the first locking surface 36 and the first locking end 37 are separated from each other after the critical state is reached, the elastic force stored by the snap spring 27 acts on the snap rod 26, the snap rod 26 rapidly moves to push the bridge plate 32 to rapidly rotate, and the armature abutting end 44 of the snap rod 26 abuts against the armature 7 to drive the armature 7 to move towards the iron core 6, so that the armature 7 is connected with the iron core 6.

Meanwhile, during the rapid rotation of the bridge plate 32 driven by the trip bar 26, the other end of the bridge plate 32 is tilted to drive the moving contact frame 8 to move upward, so that the moving contact frame 8 moves upward against the elastic force of the first elastic member 9. When the moving contact frame 8 moves upwards, the first moving contact group 10 and the second moving contact group 12 move upwards, so that the first moving contact group 10 is separated from the braking fixed contact group 14 and is contacted with the first fixed contact group 11; the second moving contact group 12 is brought into contact with the second stationary contact group 13, so that the motor can be operated, the coil 5 of the electromagnetic assembly 4 is energized, and the iron core 6 is kept attracted to the armature 7.

When the first button 2 is pressed continuously, as shown in fig. 31, the plunger 24 continuously pushes the first trip frame 33 to move, at this time, the first trip frame 33 is in a free stroke and does not abut against the bridge plate 32, the torsion of the torsion spring 41 to the second trip frame 38 is increased, so that the abutting force of the second trip frame 38 and the bridge plate 32 is increased, but the second trip frame 38 does not rotate.

After the first button 2 is stopped being pressed, the first button 2 automatically resets under the action of the return spring 23, and the electromagnetic switch is switched on.

When the second button 3 is pressed downwards, the first pressing end 45 of the second button 3 pushes the second trip frame 38 to rotate, so that the second trip frame 38 is unlocked from the bridge plate 32, and after the bridge plate 32 is restored to be free, the movable contact frame 8 moves downwards under the action of the first elastic piece 9. After releasing the second push button 3, the second push button 3 springs back upwards by being spring-biased, while the movable contact holder 8 is held in the lowermost position by the first spring 9. At this time, the second movable contact group 12 in the movable contact frame 8 is separated from the second fixed contact group 13, the first movable contact group 10 is separated from the first fixed contact group 11, and the first movable contact group 10 is contacted with the braking fixed contact group 14, so that the coil 5 of the electromagnetic assembly 4 is powered off, and after the motor is powered off, two terminals of the motor are immediately short-circuited.

After the bridge 32 is restored to be free, the movable contact holder 8 is moved downwards by the first elastic element 9 to be de-energized, whether or not the second push-button 3 is pressed continuously. When the second movable contact group 12 and the second fixed contact group 13, or the first movable contact group 10 and the first fixed contact group 11 are sintered, the second button 3 may be continuously pressed, and the second button 3 may push the movable contact frame 8 to move downward, so that the movable contact frame 8 is forced to move downward and separate from the fixed contact groups.

When power failure occurs, the armature 7 and the iron core 6 are not adsorbed any more, the armature 7 rotates upwards under the action of the tension spring 28, is separated from the second trip frame 38 and is not locked, and after the bridge plate 32 recovers to be free, the movable contact frame 8 moves downwards under the action of the first elastic piece 9. Causing the electromagnetic switch to open.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (15)

1. An electromagnetic switch, comprising:

a housing (1);

the kick mechanism is movably arranged on the shell (1);

the tripping mechanism is arranged on the shell (1) relative to the kick mechanism, can move relative to the shell (1), and comprises a bridge plate (32) positioned on a moving path of the kick mechanism, wherein the bridge plate (32) has a plurality of locking states, unlocking states and critical states of being converted from the locking states to the unlocking states;

when the kick mechanism moves downwards, the kick mechanism is abutted against the bridge plate (32) and pushes the bridge plate (32) to move to the locking state, the kick mechanism continues to move to drive the tripping mechanism to move to the critical state, the kick mechanism stores energy, and the energy storage enables the kick mechanism to move in a kick mode to connect a circuit when the kick mechanism is in the unlocking state.

2. The electromagnetic switch according to claim 1, characterized in that the snap-through mechanism comprises a snap-through body (17), a plunger (24) fixedly arranged on the snap-through body (17), and a snap-through lever (26) connected with the snap-through body (17) through a snap-through biasing member;

the tripping mechanism further comprises a first tripping frame (33) positioned on the moving path of the ejector rod (24), the bridge plate (32) is arranged on the moving path of the jump rod (26), and when the first tripping frame (33) is abutted with the bridge plate (32), the bridge plate (32) is positioned in a first locking state;

when the kick mechanism moves downwards, the kick rod (26) abuts against the bridge plate (32) and pushes the bridge plate (32) to move to the first locking state, the kick mechanism continues to move, the ejector rod (24) can drive the first tripping frame (33) to move, the kick biasing member stores energy in the process of moving to the critical state, and the stored energy enables the kick rod (26) to move in a kick mode to communicate a circuit in the unlocking state.

3. The electromagnetic switch according to claim 2, characterized in that the ejector rod (24) is fixedly arranged in the middle of the snap-through body (17), the snap-through rod (26) is sleeved on the ejector rod (24), the snap-through biasing member is a snap-through spring (27), the snap-through spring (27) is sleeved on the ejector rod (24), one end of the snap-through spring abuts against the snap-through rod (26), and the other end of the snap-through spring abuts against the snap-through body (17).

4. The electromagnetic switch according to claim 3, wherein the trip bar (26) comprises a tubular connecting end (25) sleeved with the ejector rod (24) and an abutting end extending downwards along the side wall of the tubular connecting end (25), and the trip spring (27) is arranged in the barrel of the tubular connecting end (25).

5. An electromagnetic switch according to any one of claims 2-4, characterized in that the ejector pin (24) is in threaded or riveted connection with the kick body (17).

6. The electromagnetic switch according to any of claims 2 to 4, characterized in that the plunger (24) is integrally formed with the snap-through body (17), the end of the plunger (24) remote from the snap-through body (17) being provided with a plurality of guide projections (29);

the jump rod (26) is provided with a plurality of guide holes (30) for the guide bulges (29) to pass through, and a support surface (31) which is abutted against the guide bulges (29) after the mandril (24) rotates for a set angle.

7. The electromagnetic switch according to claim 2, characterized in that the first trip frame (33) and the bridge plate (32) are each rotatably mounted on the housing (1) by means of a pin (42).

8. The electromagnetic switch according to claim 7, characterized in that the upper surface of the bridge plate (32) has a first arc surface (34) and a second arc surface (35) in stepped connection with the first arc surface (34), the first arc surface (34) is located at a side close to the second arc surface (35), the first arc surface (34) is higher than the second arc surface (35), the stepped surface of the first arc surface (34) and the second arc surface (35) is a first locking surface (36), and one end of the first trip frame (33) moves on the first arc surface (34) and the second arc surface (35) and can be clamped on the first locking surface (36).

9. The electromagnetic switch according to claim 7 or 8, characterized in that the kick body (17) is a first button (2) disposed on the housing (1), a second button (3) disposed in parallel with the first button (2) is further disposed in the housing (1), one end of a second trip frame (38) of the trip mechanism is located on a moving path of the second button (3), after the circuit is connected, the second trip frame (38) abuts against the bridge plate (32) to enable the bridge plate (32) to be in a second locked state, and when the second button (3) presses the second trip frame (38) to move to a critical state, the second trip frame continues to move to enable the bridge plate (32) to be in an unlocked state.

10. The electromagnetic switch according to claim 9, wherein the second trip frame (38) and the first trip frame (33) are rotatably mounted on the housing (1) with a pin (42), the second trip frame (38) is provided with a locking surface (40) locked with the bridge plate (32), the bridge plate (32) is provided with a second locking surface (39) having a step shape, and after the locking surface (40) is attached to the second locking surface (39), the bridge plate (32) is in the second locking state.

11. The electromagnetic switch according to claim 10, characterized in that the second trip frame (38) and the first trip frame (33) are connected by a torsion spring (41), and in the second locked state, when the first trip frame (33) is driven by the push rod (24) to rotate, the torsion force applied to the second trip frame (38) is increased.

12. The electromagnetic switch according to claim 9, further comprising a seat body (47) for setting the trip mechanism, wherein the seat body (47) is fixedly installed in the housing (1), the seat body (47) has two pairs of installation holes arranged in a step shape, and two ends of the two pins (42) are respectively installed in the corresponding installation holes.

13. The electromagnetic switch according to claim 9, further comprising,

an electromagnetic assembly (4) arranged corresponding to the first button (2);

the armature (7) has one end positioned between the electromagnetic component (4) and the kick mechanism and the other end rotatably connected to the electromagnetic component (4) or the shell (1) through a tension spring (28), and can be driven by the kick rod (26) to move towards the electromagnetic component (4) so as to be connected with the electromagnetic component (4);

the contact mechanism is arranged corresponding to the second button (3) and comprises a movable contact frame (8), one end of the bridge plate (32) extends into the movable contact frame (8), the upper end of the movable contact frame (8) is located on the moving path of the second button (3), and the bridge plate (32) drives the movable contact frame (8) to move so as to be connected with a circuit.

14. The electromagnetic switch according to claim 13, characterized in that the abutment end of the jumper (26) comprises a bridge abutment end (43) abutting the bridge (32) and an armature abutment end (44) abutting the armature (7), the height of the bridge abutment end (43) being smaller than the height of the armature abutment end (44).

15. The electromagnetic switch according to claim 14, characterized in that said second push-button (3) comprises a first pressing end (45) in abutment with said second trip frame (38) and a second pressing end (46) in abutment with the upper end of said movable contact carrier (8) arranged in parallel with said first pressing end (45).

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