CN219979410U - Multifunctional motor control switch - Google Patents

Abstract

The utility model provides a multifunctional motor control switch, which mainly relates to the field of motor switch control of food processing machines, and comprises the following components: the shell and the rotary handle component of different return circuits of rotatory trigger, the rotary handle component includes the rotary handle axle and through rotary handle axle driven rotary handle support, be provided with power supply splicing, motor splicing and the different contacts of positive negative pole of setting on the splicing on the shell, drive two conductive shell fragments through the rotary handle component and move to form different trigger return circuits, the free end through first shell fragment and second shell fragment is crisscross the motion from top to bottom to trigger different contacts, corresponds the different control mode of switching, under the standby state, two shell fragments have at least one free end unsettled between positive negative pole contact, ensures that the switch is in the safe state of circuit breaking. The control switch utilizes the conductive elastic sheet and the rotary handle to stably abut against and switch and trigger in the rotating process, and integrates a plurality of loop triggering structures, thereby simplifying the circuit and saving the cost.

Description

Multifunctional motor control switch

Technical Field

The utility model relates to the technical field of food processing, in particular to a multifunctional motor control switch.

Background

In the existing portable food processor, a control switch is often arranged between a power supply and a motor to control the motor to drive and control a machined part, for example, a common juice machine, a cooking machine and the like in the market, and the food in a cavity can be processed by controlling and starting through a switch key; however, most of the food processing machines adopt direct current motors, and the power supply is fixedly connected with the motors, so that only the forward rotation of the motors can be controlled, the functions are single, and the use process of users is limited greatly.

In order to realize the control of the forward rotation, the reverse rotation and the stop of the motor, a motor control switch with six-pole pins is generally needed, and the current direction of the direct current motor is exchanged and the motor steering is changed by conducting AC+ interlacing with DJ+ and DJ-. However, the scheme is complex in circuit connection, is often used for the rocker switch, and needs a control panel for cooperation use, so that the overall use cost is high.

In addition, the scheme is that the movable contact is switched by the movable conducting strip, and the forward and reverse rotation switching of the circuit can be realized by the four-pole pins only by simplifying the circuit, but the overall trigger control reliability is poor. For example, in patent publication No. CN214964418U, a control switch capable of adjusting forward and reverse rotation of a dc motor is disclosed, two conductive sheets are integrally disposed on an adjusting component, and the adjusting component is utilized to move to drive the conductive sheets to be at different positions, so that the conductive sheets are respectively conducted with a positive electrode and a negative electrode of a power supply and a positive electrode and a negative electrode of the motor to trigger to form different conductive loops. However, the triggering mode of fixing the conducting strip on the adjusting component can solve the problem of switching and triggering of different loops, but because the adjusting component is directly driven by external force, the offset easily occurs in the long-term adjusting and using process of a user, the stability of the triggering position of the conducting strip on the adjusting component is poor, and unsafe factors such as open circuit, ignition and the like of a switch loop are easily caused by poor contact.

To avoid the above problems, how to provide a motor control switch with stable multi-loop switching trigger and simple and reliable structure is still a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The utility model aims to provide a multifunctional motor control switch, which utilizes a rotary handle structure and the rebound force of a spring piece to drive a conductive spring piece to be in contact with different contacts, so that the conductive spring piece can keep the contact position when being triggered by each contact, and the stability and the reliability of the control switch in a switching trigger loop are ensured.

The technical problems proposed by the utility model are mainly solved by the following technical scheme:

a multi-function motor control switch comprising: the rotary handle assembly comprises a rotary handle shaft and a rotary handle support driven by the rotary handle shaft, wherein a power supply tab and a motor tab are arranged on the housing, the motor tab comprises a first contact and a second contact which are arranged on a motor positive tab and a third contact and a fourth contact which are arranged opposite to the first contact and the second contact on a motor negative tab, the control switch comprises a first elastic piece and a second elastic piece which can conduct electricity, and the first elastic piece and the second elastic piece respectively comprise a fixed end fixedly connected with the power supply tab and a movable rebound free end;

in the working state, the rotary handle support pushes the free end of the first elastic piece and the free end of the second elastic piece to trigger the first contact and the fourth contact respectively or trigger the third contact and the second contact respectively;

in the standby state, at least one free end of the first elastic piece and at least one free end of the second elastic piece are suspended between the positive contact and the negative contact of the motor connecting piece.

Further, the rotary handle assembly comprises a first rotating direction and a second rotating direction, wherein the rotary handle shaft drives the rotary handle support, and when the rotary handle support is driven along the first rotating direction, the rotary handle support respectively pushes the first elastic sheet to move towards the first contact and pushes the second elastic sheet to move towards the fourth contact; when the rotary handle support is driven along the second rotation direction, the first elastic sheet is respectively pushed to move towards the third contact and the second elastic sheet is respectively pushed to move towards the second contact.

Further, the control switch comprises a first trigger loop and a second trigger loop;

the first trigger circuit: two ends of the first elastic sheet are respectively communicated with the first contacts of the positive electrode of the power supply tab and the positive electrode tab of the motor, and two ends of the second elastic sheet are respectively communicated with the fourth contacts of the negative electrode of the power supply tab and the negative electrode tab of the motor;

the second trigger circuit: the two ends of the first elastic sheet are respectively communicated with the third contact points of the positive electrode of the power supply tab and the negative electrode of the motor, and the two ends of the second elastic sheet are respectively communicated with the second contact points of the negative electrode of the power supply tab and the positive electrode of the motor.

Further, the motor positive electrode tab and the motor negative electrode tab are oppositely arranged, the first contact and the third contact are respectively arranged at two sides of the rebound direction of the first elastic sheet, and the second contact and the fourth contact are respectively arranged at two sides of the rebound direction of the second elastic sheet.

Further, the rebound directions of the first elastic sheet and the second elastic sheet face to the same side, and the first elastic sheet and the second elastic sheet keep relative alternate movement under the action of self rebound force and pushing force of the rotary handle support.

Further, the first elastic piece and the second elastic piece respectively comprise a fixed end and an elastic extension arm which extends outwards, the fixed end is respectively fixedly connected with the positive power supply connection piece and the negative power supply connection piece, and the tail end of the elastic extension arm is suspended between the positive power supply connection piece and the negative power supply connection piece.

Further, an arched part is arranged on one side of the elastic extension arm, which is close to the rotary handle, and the elastic extension arm is supported with the rotary handle by taking the arched part as a fulcrum.

Further, the fixed end is provided with a bending part in transitional connection with the elastic extension arm, and the included angle between the starting end of the bending part and the tail end of the elastic extension arm is not more than 90 degrees.

Further, the rotary handle support comprises a first rotary handle cam capable of being abutted to the first elastic piece and a second rotary handle cam abutted to the second elastic piece, the first rotary handle cam and the second rotary handle cam comprise jacking positions and release positions, the jacking positions of the first rotary handle cam and the release positions of the second rotary handle cam are axially arranged in parallel, and the release positions of the first rotary handle cam and the jacking positions of the second rotary handle cam are axially arranged in parallel.

Further, when the first rotary handle cam is in abutting connection with the first elastic piece at the jacking position, the second elastic piece is located at the releasing position of the second cam to rebound, and at the moment, the first elastic piece is correspondingly conducted with the first contact, and the second elastic piece is correspondingly conducted with the fourth contact; when the first elastic piece is in rebound of the release position of the first rotary handle cam, the jacking position of the second cam is abutted against the second elastic piece, and at the moment, the first elastic piece is correspondingly conducted with the third contact and the second elastic piece is conducted with the second contact.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the positive and negative connection plates of the motor are oppositely arranged, the free end of the elastic sheet moves between the positive connection plate of the motor and the negative connection plate of the motor, and the switching of different trigger loops is realized through the resilience acting force of the rotary handle assembly and the free end of the elastic sheet. Firstly, positive and negative connection plates of a motor are oppositely arranged, so that the movement direction of an elastic sheet and the triggering direction of a free end can be kept in the same direction, and the stability of a contact hair mode is ensured; further, the elastic piece resilience force direction is opposite to the action direction of the abutting force of the rotary handle assembly, and as the elastic piece resilience force keeps normal state stable, the force applied by the rotary handle assembly can be increased or released only through the arrangement of the rotary handle assembly to control the reciprocating motion state of the free end of the elastic piece, and a circuit and a control board do not need to be arranged independently, so that the manufacturing cost of the control switch can be saved, a plurality of trigger loops of the switch piece can be integrated, the circuit is simplified, and unstable factors such as winding, loose contacts and the like of the knob switch in the rotation process can be further avoided.

2. In the working state, the conductive elastic sheet and the contact can be kept in a stable abutting state through the elastic force of the free end or the abutting acting force of the rotary handle assembly; and in the non-working state, the free end of at least one conductive spring piece can be abutted and suspended by the abutment of the rotary handle assembly, so that the switching circuit is ensured to be in a stable state of breaking. The control switch can keep the free end of the elastic sheet in an abutting posture when in any position no matter in a working state or a non-working state, the reliability of a trigger loop of the corresponding switch is improved, and potential safety hazards such as ignition and the like caused by looseness of the trigger node are avoided.

3. The rotary handle support of the rotary handle assembly rotates along the first direction or the second direction through the rotary handle shaft, different trigger loops are correspondingly triggered respectively, and the first elastic sheet and the second elastic sheet are pushed along opposite directions in two rotating directions of the rotary handle support, so that the conductive elastic sheet can be further prevented from being in contact with the same motor tab at the same time, the short circuit is prevented from occurring in the switching adjustment process, and the safety and reliability of user operation are improved.

4. In addition, because the first elastic sheet and the second elastic sheet switch different working loops, the two elastic sheets keep moving alternately under the action of self resilience force and pushing force of the rotary handle support, a stop or blocking structure is not needed to be arranged in the middle, the design cost that the switch loop needs to stay through a neutral position during switching is saved, the first trigger loop can be directly switched to the second trigger loop, and the overall adjustment and use experience of the control switch is improved.

5. The free ends of the first elastic sheet and the second elastic sheet comprise elastic extension arms extending outwards along the fixed ends, the elastic extension arms are provided with arch parts on one side close to the rotary handle support, the top points of the arch parts are used as supporting points to be abutted against the rotary handle support, on one hand, the elastic toughness of the elastic extension arms in the extending direction can be enhanced, meanwhile, the abutting tightness between the free ends and the motor contact pieces can be enhanced, and the loop reliability of the elastic sheets at the triggering position is ensured.

6. And the fixed end position department at first shell fragment and second shell fragment still is provided with the portion of bending, through limiting the initiating terminal of the portion of bending and the terminal contained angle of elasticity extension arm within 90, ensures that the resilience direction and the resilience force of first shell fragment and second shell fragment both can keep stable, promotes the life of shell fragment.

7. The rotary handle support comprises a first rotary handle cam which is abutted against the first elastic piece and a second rotary handle cam which is abutted against the second elastic piece, wherein the jacking position is also positioned in the circumference of the rotary handle support, the jacking position of the first rotary handle cam and the release position of the second rotary handle cam are axially arranged in parallel, the release position of the first rotary handle cam and the jacking position of the second rotary handle cam are axially arranged in parallel, and as the rotary handle support and the rotary handle shaft are coaxially arranged, when a user rotates the rotary handle assembly around the axis, the deflection arm of the rotary handle support is almost zero, and the consistency of the jacking height of each rotation of the jacking position in the circumference can be further improved, so that the switching reliability of a trigger loop controlled by the knob assembly is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a multi-function control motor according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a control switch trigger structure according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a control switch trigger circuit according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of a trigger structure of a first trigger loop of a control switch according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of a trigger structure in a standby state of a control switch according to an embodiment of the present utility model;

fig. 6 is a schematic diagram of a trigger structure of a second trigger circuit of the control switch according to an embodiment of the present utility model;

FIG. 7 is a schematic view of the overall structure of a knob assembly according to an embodiment of the utility model;

FIG. 8 is a schematic view of a corner configuration of a twist grip assembly according to an embodiment of the present utility model;

fig. 9 is a schematic diagram of a conductive spring fixing structure according to an embodiment of the present utility model;

fig. 10 is a schematic diagram of a conductive spring bending structure according to an embodiment of the present utility model.

Icon: a front view of the A-rotary handle switch and a back view of the B-rotary handle switch;

the device comprises a 1-shell, a 2-rotary handle assembly, a 3-conductive spring piece, a 4-power supply connection piece and a 5-motor connection piece;

11-upper cover, 12-box, 21-rotary handle shaft, 22-rotary handle bracket, 23-first rotary handle cam, 24-second rotary handle cam, 25-jack-up position, 26-release position, 251-first jack-up position and 252-second jack-up position;

31-a first elastic piece, 32-a second elastic piece, 33-a fixed end, 34-a free end, 35-an elastic extension arm, 351-a bending part and 352-an arched part;

41-power positive tab, 42-power negative tab, 51-motor positive tab, 52-motor negative tab, 511-first contact, 512-second contact, 521-third contact, 522-fourth contact.

Detailed Description

The terms "first," "second," "third," and the like are used merely for distinguishing between descriptions and not for indicating a sequence number, nor are they to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "inner", "outer", "left", "right", "upper", "lower", etc., are based on directions or positional relationships shown in the drawings, or directions or positional relationships conventionally put in use of the product of the application, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements.

The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a control switch triggering structure according to an embodiment of the utility model. The control switch comprises a housing 1 and a knob assembly 2 arranged on the housing 1 for rotationally triggering the different control circuits. Wherein the spin handle assembly 2 comprises a spin handle shaft 21 and a spin handle holder 22 driven by the spin handle shaft 21.

In an operation process, the knob support 22 is correspondingly assembled inside the housing 1, one end of the knob shaft 21 extends into the housing 1 and is fixedly connected with the knob support 22, and the other end is exposed outside the housing 1 and is fixedly connected with an external knob, so that a user can adjust different control loops through the external knob.

Specifically, the casing 1 includes a casing 12 and a cover plate 11 that is assembled on the casing 12 in a covering manner, and an axial limiting structure for fixing the knob support 22 is provided inside the casing 12, so that the knob support 22 can rotate circumferentially around the axis in the casing 12.

In an embodiment, a mounting opening is provided at a side of the case 12, a rotation handle support 22 is coaxially provided with the mounting opening, and a flat slot capable of being in plug-in fit with the rotation handle shaft 21 is further provided at a central position of the rotation handle support 22, and the rotation handle shaft 21 drives the rotation handle support 22 to move relatively in a circumferential direction by being inserted into the flat slot.

It will be appreciated that the stem 21 and stem support 22 may be integrally formed, and the housing 12 may include a front housing and a rear housing, with the front housing having a mounting opening, and the stem 21 may be mounted coaxially by inserting the end of the stem through the mounting opening in the side of the housing and clamping the stem through the front and rear housings to secure the stem assembly 2.

Fig. 2 is a schematic diagram of a control switch triggering structure according to an embodiment of the utility model. The shell 1 is respectively provided with a power supply tab 4 and a motor tab 5, and a conductive spring sheet 3 which is movably connected with the power supply tab 4 and the motor tab 5 through the driving of the rotary handle assembly 2.

Preferably, the conductive spring 3 includes a first spring 31 and a second spring 32, the first spring 31 and the second spring 32 include a fixed end 33 and a free end 34 capable of springback, the power supply tab 4 includes a power supply positive tab 41 and a power supply negative tab 42, and the motor tab 5 includes a motor positive tab 51 and a motor negative tab 52, respectively.

Specifically, the fixed ends 33 of the first elastic piece 31 and the second elastic piece 32 are fixedly connected to the positive power supply tab 41 and the negative power supply tab 42, respectively, and the free ends 34 are movably switched between the positive motor tab 51 and the negative motor tab 52, respectively. It is easy to think that the fixed ends of the first elastic piece 31 and the second elastic piece 32 can also be directly and fixedly connected with the positive electrode and the negative electrode of the motor connecting piece respectively, and the free ends of the two can respectively move between the positive electrode and the negative electrode of the power connecting piece.

In one embodiment, the motor positive tab 51 is disposed opposite the motor negative tab 52, the motor positive tab 51 including a first contact 511 and a second contact 512, and the motor negative tab 52 including a third contact 521 and a fourth contact 522. The free end 34 of the first elastic piece 31 is in contact with the handle support 22 and is disposed between the first contact 511 and the third contact 521 for reciprocating motion, and the free end 34 of the second elastic piece 32 is in contact with the handle support 22 and is disposed between the second contact 512 and the fourth contact 522 for reciprocating motion.

In an operation process, referring to fig. 3, the control switch can be triggered by electrically conducting the free end of the first elastic piece 31 with the first contact 511 of the motor positive electrode tab 51 and electrically conducting the free end of the second elastic piece 32 with the fourth contact 522 of the motor negative electrode tab 52 in an operating state to form a first trigger loop of the control switch; the free end of the first elastic piece 31 is switched to be electrically conducted with the third contact 521 of the motor negative electrode tab 52 through the adjusting knob, and the free end of the second elastic piece 32 is electrically conducted with the second contact 512 of the motor positive electrode tab 51, so as to form a second trigger loop of the control switch.

It will be appreciated that the first trigger circuit and the second trigger circuit can each correspond to a different function, and no specific limitation is required herein. For example, different loops can be switched by a control switch, so that the forward rotation starting and the reverse rotation starting of the motor can be correspondingly realized, and the high and low power can be switched according to the power requirements under the condition of different processing modes.

In addition, at least two groups of contacts are arranged on the motor connecting sheet 5, and more than two trigger loops can be correspondingly formed. It can be understood that the control switch may further include a third spring, and a fifth contact and a sixth contact are further disposed between the motor positive electrode tab 51 and the motor negative electrode tab 52, so as to correspondingly drive the conductive spring 3 to abut against or keep a suspended state up and down in different rotation positions.

Fig. 4, 5 and 6 are schematic structural diagrams showing the state that the free end of the conductive spring plate 3 is respectively in three different positions, i.e. up-abutting, suspending and down-abutting.

Preferably, the free ends 34 of the first elastic sheet 31 and the second elastic sheet 32 in the control switch housing 1 are abutted to each other through the rotary handle support 22 to perform staggered movement, and in a non-working state, at least one of the free ends is suspended between the positive electrode and the negative electrode of the motor connecting sheet 5, so that the condition that the first elastic sheet 31 and the second elastic sheet 32 are abutted to each other towards the same motor connecting sheet 5 in the movement process is avoided, and the potential safety hazard of short circuit of the control switch is avoided.

In one embodiment, the stem support 22 includes a first rotational direction and a second rotational direction that are driven by the stem shaft. Specifically, when the control switch is in the standby state, the first elastic piece 31 and the second elastic piece 31 are simultaneously supported by the knob support 22 to a suspended position, and at this time, the control circuit is not conducted and triggered. When the handle support 22 is driven along the first rotation direction, the handle support 22 correspondingly drives the first elastic piece 31 to approach the first contact 511, and simultaneously correspondingly releases the second elastic piece 32 to approach the fourth contact 522; when the lever bracket 22 is driven in the second rotation direction, the lever bracket 22 correspondingly releases the first elastic piece 31 to approach the third contact 521, and simultaneously correspondingly drives the second elastic piece 32 to approach the second contact 512.

It can be appreciated that when the knob support 22 rotates in place along the first rotation direction, the two ends of the first elastic piece 31 are respectively conducted with the first contacts 511 of the power positive electrode tab 41 and the motor positive electrode tab 51, and the two ends of the second elastic piece 32 are respectively conducted with the fourth contacts 522 of the power negative electrode tab 42 and the motor negative electrode tab 52, so as to form a first trigger loop in a stable state; when the knob support 22 rotates in place along the second rotation direction, the two ends of the first elastic piece 31 are respectively conducted with the third contacts 521 of the power source positive electrode tab 41 and the motor negative electrode tab 52, and the two ends of the second elastic piece 32 are respectively conducted with the second contacts 512 of the power source negative electrode tab 42 and the motor positive electrode tab 51, so as to form a second trigger loop in a stable state.

In yet another embodiment, in the standby state, the first elastic piece 31 is abutted by the handle support 22 so that the free end 34 is in a suspended state, and the second elastic piece 32 can be abutted by the handle support 22 or completely released by the handle support 22, and the second elastic piece 32 is in a state of triggering and conducting with the motor tab 5, but the whole triggering circuit is still in a safe circuit breaking protection state because the first elastic piece 31 is in a suspended state.

It can be understood that when the knob support 22 adjusts the switching trigger circuit, the first spring 31 is directly driven to jack up in a direction opposite to the second spring 32 until the first trigger circuit is formed after the first trigger circuit is triggered by the corresponding contact; or, the second spring piece 32 is released or jacked up first to separate from the corresponding contact until the second spring piece returns to the suspended position parallel to the first spring piece 31, and then the first spring piece 31 and the second spring piece 32 are released at the same time to perform staggered movement, and the second trigger loop is formed after the second spring piece and the corresponding contact on the opposite side are triggered respectively.

Preferably, the first elastic piece 31 and the second elastic piece 32 are located in the same horizontal direction, and the rebound directions of the free ends 34 of the first elastic piece and the second elastic piece face to one side of the rotary handle support 22, and the elastic pieces and the supporting force of the rotary handle support 22 are alternated to realize the reciprocating motion of the elastic pieces.

Referring to fig. 7 and 8, a schematic structural diagram of a knob assembly 2 according to an embodiment of the utility model is shown. The handle support 22 includes a main body capable of being in plug-in fit with the handle shaft 21, and a first handle cam 23 and a second handle cam 24 which are arranged on the main body and are respectively aligned with the first elastic piece 31 and the second elastic piece 32 up and down. Preferably, the first and second knob cams 23 and 24 are disposed in parallel, and a jack position and a release position that abut or release the corresponding conductive elastic piece are respectively disposed in the circumferential direction.

In one embodiment, the lifting position 25 and the releasing position 26 on the first rotary handle cam 23 and the second rotary handle cam 24 are staggered. It can be understood that the first rotary handle cam 23 and the second rotary handle cam 24 are respectively disposed at the left and right sides of the main body of the rotary handle support 22, where the jack-up position 25 of the first rotary handle cam 23 is disposed opposite to the release position 26 of the second rotary handle cam 24, and the release position 26 of the first rotary handle cam 23 is disposed opposite to the jack-up position 25 of the second rotary handle cam 24, and are disposed in parallel along the axial center in the circumferential direction, so that when the first rotary handle cam 23 jacks up the first elastic sheet 31 to trigger at the jack-up position 25, the second rotary handle cam 24 is triggered with the corresponding contact after the release position 26 is in rebound to release the second elastic sheet 32, whereas when the release position 26 releases rebound triggering of the first elastic sheet 31, the first rotary handle cam 23 is in the jack-up position 25 that abuts the second elastic sheet 32 and is triggered with the corresponding contact.

Preferably, the jack-up position 25 further includes a first jack-up position 251 and a second jack-up position 252, wherein the second jack-up position 252 corresponds to an abutment point of the free end of the conductive spring sheet 3 in a suspended state.

It can be understood that the first jack-up position 251 and the release position 26 of the first rotary handle cam 23 and the second rotary handle cam 24 are triggered alternately to correspond to different loops respectively, and the second jack-up portions 252 of the two are arranged at least partially in parallel in the circumferential direction and correspond to the open circuit triggering state under the standby condition with the abutting point of the conductive spring plate 3.

In an embodiment, the second jack-up position 252 is disposed between the first jack-up position 251 and the release position 26 of the first rotary handle cam 23 and the second rotary handle cam 24, respectively, when the rotary handle assembly 22 rotates along the first direction, the contact point between the first rotary handle cam 23 and the first elastic piece 31 sequentially passes through the first jack-up position 251, the second jack-up position 252 and the release position 26, and the contact point between the second rotary handle cam 24 and the second elastic piece 32 sequentially passes through the release position 26, the second jack-up position 252 and the first jack-up position 251; when the knob assembly 22 rotates along the second direction, the contact point between the first knob cam 23 and the first elastic piece 31 sequentially passes through the release position 26, the second jack-up position 252, and the first jack-up position 251, and the contact point between the second knob cam 24 and the second elastic piece 32 sequentially passes through the first jack-up position 251, the second jack-up position 252, and the release position 26.

It is easy to think that when the first lever cam 23 is in abutment with the first elastic piece 31 at the jack-up position 25, the second elastic piece 32 is located at the release position 26 of the second lever cam 24 to rebound, and at this time, the free end of the first elastic piece 31 is correspondingly conducted with the first contact 511, and the second elastic piece 32 is correspondingly conducted with the fourth contact 522; when the first elastic piece 31 is in the rebound of the release position 26 of the first rotary handle cam 23, the jack 25 of the second rotary handle cam 24 abuts against the free end of the second elastic piece 32, and at this time, the first elastic piece 31 is correspondingly conducted with the third contact 521, and the second elastic piece 32 is correspondingly conducted with the second contact 512.

In yet another embodiment, the first and second stem cams 23 and 24 may also be optionally provided with only the second lifting position 252. Specifically, a first jack-up position 251, a second jack-up position 252 and a release position 26 are sequentially arranged on the first rotary handle cam 23, and a release position 26 and a jack-up position 25 are correspondingly arranged on the second rotary handle cam 24, wherein the second jack-up position 252 on the first rotary handle cam 23 can completely cover a connecting section between the release position 26 and the jack-up position 25 on the second rotary handle cam 24 in the circumferential direction.

It will be appreciated that the radius of the circumscribing circles of the first jack-up bit 251, the second jack-up bit 252, and the release bit 26 on the first and second knob cams 23, 24 are R1, R2, and R3, respectively, where R1 > R2 > R3. It is readily contemplated that the release position 26 may also be a direct override setting without affecting the specific function implementation of the present control switch.

Preferably, the rotation angle of the rotary switch in the circumferential direction is a, wherein the rotation angle corresponding to the abutting section of the first jack-up position 251 is a2, the rotation angle corresponding to the abutting section of the second jack-up position 252 is a1, the rotation angle corresponding to the release position 26 is a3, and a3=a-a 1-a2 is satisfied.

In an operation process, the maximum rotation angle of the rotation handle support 22 capable of rotating circumferentially is a, and the rotation angle in the standby state is a1, and the requirement of 90% or more is less than or equal to a1/a < 100%. It can be understood that when the rotatable angle of the knob switch is 100 °, the reverse rotation angle is-45 ° to-50 °, and the forward rotation angle is 45 ° to 50 °, wherein the standby movable rotation angle a1=90°, the abutment angle a2=5° actually triggered by the forward rotation of the motor, and the abutment angle a3=5° actually triggered by the reverse rotation of the motor.

Preferably, the rotary handle assembly 2 is made of non-conductive materials, the rotary handle support 22, the first elastic piece 31 and the second elastic piece 32 are in split type structures, and the first elastic piece 31 and/or the second elastic piece 32 can be enabled to have enough supporting force to act when triggered by corresponding contacts through the relative movement of the rotary handle support 22 and the conductive elastic piece 3, so that stable and reliable contact connection state is ensured.

Please refer to fig. 9 and 10, which are schematic diagrams illustrating a specific structure of the conductive spring 3 according to an embodiment of the present utility model. The conductive spring plate 3 comprises a fixed end 33 and an elastic extension arm 35 extending outwards along the fixed end 33, wherein the fixed end 33 is fixedly connected with the power supply tab 4 or the motor tab 5, the elastic extension arm 35 transiting to the free end 34 is formed by extending outwards along the fixed end 33, and the first spring plate 31 and the second spring plate 32 are driven to move up and down alternately between the contacts by abutting the knob assembly 22 with the elastic extension arm 35.

In an embodiment, the elastic extension arm 35 is provided with an upwardly protruding arch portion 352 at a position abutting against the knob support 22, and the whole elastic extension arm 35 is supported by the arch portion 352 as a supporting point, so that on one hand, the supporting arm between the conductive elastic sheet 3 and the knob support 22 can be prolonged, the longitudinal height of the knob cam is reduced, the movable space of the free end 34 in the extending direction is increased, meanwhile, avoidance can be formed between the elastic sheet and the knob cam, the abutting position can be ensured to be consistently kept at the arch portion 352, and the stability of abutting driving is improved.

Preferably, in order to ensure that the deformation force generated by the operation of the elastic sheet is smaller, the resistance arm needs to be as large as possible, and therefore, the elastic sheet can be arranged to be bent in a double arc shape to increase the length of the force arm.

In an embodiment, the fixing end 33 is further provided with a bending portion 351 for changing the extending direction at the position extending outwards, and the conductive spring 3 generates a sufficient deformation through the bending portion 351, so as to ensure that the spring itself can accumulate a certain elastic force for recovering the elastic deformation, and the conductive spring 3 is driven by the interaction of the elastic force and the abutting force of the knob assembly 22 at the arch portion 352.

It can be understood that referring to fig. 10, the fixing end 33 of the conductive elastic sheet 3 is used as a fulcrum to bend by 90 ° and set with an arc for transition, so that the elastic force recovered by elastic deformation can be realized, and meanwhile, the length of the arm of force of the elastic extension arm can be correspondingly increased.

Further, the average bending radius of the bending portion 351 is R2, the average bending radius of the arch portion 352 is R1, and the effective length of the cantilever can be increased as much as possible by meeting the size relation that R1 is less than or equal to R2 is less than or equal to 3R1, so that the deformation of the elastic sheet can be relatively small under the same swinging angle, thereby increasing the fatigue durability of the elastic sheet and prolonging the service life of the switch.

It is easily conceivable that the bent portion 351 or the arch portion 352 may be formed by bending in a circular arc shape, or may have any shape including a triangle, an arch, a trapezoid, or the like.

Whether the conductive spring plate 3 or the rotary handle support 22 in this scheme needs to meet the abutting matching relationship, the first spring plate 31 is correspondingly driven by the first rotary handle cam 23, the second spring plate is correspondingly driven by the second rotary handle cam 24, the number of the spring plates and the cams is not specifically limited, and multiple groups of triggers can be correspondingly set according to the number of trigger loops which are needed to be realized. It is easy to understand that different trigger loops can be formed by setting the abutting positions of different rotary handles and the elastic sheet in the circumferential direction and reasonably distributing different rotation angles.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The multifunctional motor control switch comprises a shell and a rotary handle assembly for rotationally triggering different loops, wherein the rotary handle assembly comprises a rotary handle shaft and a rotary handle bracket driven by the rotary handle shaft, and a power supply tab and a motor tab are arranged on the shell;

in the working state, the rotary handle support pushes the free end of the first elastic piece and the free end of the second elastic piece to trigger the first contact and the fourth contact respectively or trigger the third contact and the second contact respectively;

in a standby state, at least one free end of the first elastic piece and at least one free end of the second elastic piece are suspended between the positive contact and the negative contact of the motor connecting piece;

the movable rotating angle of the rotary handle support in the standby state is larger than the sum of the movable rotating angles of different trigger loops in the working state.

2. The multifunctional motor control switch of claim 1, wherein the knob assembly comprises a first rotational direction and a second rotational direction that drive a knob support via a knob shaft, the knob support, when driven in the first rotational direction, respectively pushes the first spring to move toward the first contact and the second spring to move toward the fourth contact; when the rotary handle support is driven along the second rotation direction, the first elastic sheet is respectively pushed to move towards the third contact and the second elastic sheet is respectively pushed to move towards the second contact.

3. A multi-function motor control switch as recited in claim 1, wherein said control switch comprises a first trigger loop and a second trigger loop; wherein,

the first trigger circuit: two ends of the first elastic sheet are respectively communicated with the first contacts of the positive electrode of the power supply tab and the positive electrode tab of the motor, and two ends of the second elastic sheet are respectively communicated with the fourth contacts of the negative electrode of the power supply tab and the negative electrode tab of the motor;

the second trigger circuit: the two ends of the first elastic sheet are respectively communicated with the third contact points of the positive electrode of the power supply tab and the negative electrode of the motor, and the two ends of the second elastic sheet are respectively communicated with the second contact points of the negative electrode of the power supply tab and the positive electrode of the motor.

4. The multifunctional motor control switch according to claim 1, wherein the motor positive electrode tab and the motor negative electrode tab are arranged opposite to each other, a first contact and a third contact are arranged in the rebound direction of the first elastic sheet correspondingly, and a second contact and a fourth contact are arranged in the rebound direction of the second elastic sheet correspondingly.

5. The switch of claim 4, wherein the spring back directions of the first spring and the second spring are toward the same side, and the first spring and the second spring keep relative alternate movement under the action of self spring back force and pushing force of the knob bracket.

6. The multifunctional motor control switch according to claim 1, wherein the fixed ends of the first elastic piece and the second elastic piece are fixedly connected with the positive power supply tab and the negative power supply tab respectively, the free ends comprise elastic extension arms extending outwards along the fixed ends, and the tail ends of the elastic extension arms are suspended between the positive power supply tab and the negative power supply tab in a standby state.

7. The switch of claim 6, wherein the elastic extension arm is provided with an arch portion at a side near the handle bracket, and is supported with the handle by the arch portion as a fulcrum.

8. The multifunctional motor control switch according to claim 6, wherein the fixed end is provided with a bending part in transitional connection with the elastic extension arm, and an included angle between a starting end of the bending part and a tail end of the elastic extension arm is not greater than 90 °.

9. The multifunctional motor control switch according to claim 2, wherein the rotary handle support comprises a first rotary handle cam capable of being abutted against the first elastic piece and a second rotary handle cam abutted against the second elastic piece, the first rotary handle cam and the second rotary handle cam comprise jacking positions and release positions, the jacking positions of the first rotary handle cam and the release positions of the second rotary handle cam are axially arranged in parallel, and the release positions of the first rotary handle cam and the jacking positions of the second rotary handle cam are axially arranged in parallel.

10. The switch of claim 9, wherein when the first lever cam is in abutment with the first spring, the second spring is in rebound with the release position of the second lever cam, and at this time, the first spring is correspondingly connected to the first contact, and the second spring is connected to the fourth contact; when the first elastic piece is in rebound of the release position of the first rotary handle cam, the jacking position of the second rotary handle cam is abutted against the second elastic piece, and at the moment, the first elastic piece is correspondingly conducted with the third contact and the second elastic piece is conducted with the second contact.