阅读说明：本技术 一种用于升降机构的控制装置 (Control device for lifting mechanism ) 是由 丁苗江 童炎君 周少萍 于 2021-05-31 设计创作，主要内容包括：本发明公开了一种用于升降机构的控制装置,属于升降控制技术领域,包括安装于升降机构上的安装盒、电路板、部分深入安装盒内的拨片总成,电路板包括控制升降的弹性自复位的升降开关,拨片总成受到拨动以闭合升降开关,拨片总成两侧壁上设有限位部,限位部与开关沿拨片总成深入方向错位设置,限位部能随拨片总成竖向运动,安装盒两侧壁上设有止挡部；拨片总成包括自由状态和拨动状态,自由状态下,止挡部竖向止挡限位部,拨动状态下,拨片总成以止挡部和限位部的接触点为支点转动,止挡部和限位部止挡结构的限位强度更高,限位效果更好,结构简单,装配精度要求低,降低加工难度。(The invention discloses a control device for a lifting mechanism, which belongs to the technical field of lifting control and comprises a mounting box, a circuit board and a shifting piece assembly, wherein the mounting box is mounted on the lifting mechanism, and part of the shifting piece assembly extends into the mounting box; the plectrum assembly includes free state and stirring state, and under the free state, the spacing portion of the vertical backstop of backstop portion, under the stirring state, the plectrum assembly uses the contact point of backstop portion and spacing portion as the fulcrum rotation, and backstop portion and spacing portion backstop structure's spacing intensity is higher, and spacing effect is better, simple structure, and the assembly required precision is low, reduces the processing degree of difficulty.)

1. A control device for a lifting mechanism comprises a mounting box, a circuit board and a shifting piece assembly, wherein the mounting box is mounted on the lifting mechanism, the shifting piece assembly partially penetrates into the mounting box, the circuit board comprises an elastic self-resetting lifting switch for controlling lifting, and the shifting piece assembly is shifted to close the lifting switch;

the plectrum assembly includes free state and stirring state, and under the free state, the vertical backstop spacing portion of backstop portion, under stirring state, the plectrum assembly uses the contact point of backstop portion and spacing portion as the fulcrum rotation.

2. The control device for a lifting mechanism according to claim 1, wherein the lifting switch includes an up switch and a down switch, the paddle assembly is toggled to close the up switch or the down switch, the limit portion includes a first limit portion and a second limit portion, the first limit portion is located between the up switch and the down switch, the second limit portion is located between the first limit portion and the down switch, and the stop portion includes a first stop portion cooperating with the first limit portion and a second stop portion cooperating with the second limit portion.

3. The control device for a lifting mechanism according to claim 2, wherein the lifting switch is closed when the dial assembly is dialed up, the dial assembly uses a contact point of the second stopping portion and the second limiting portion as a rotation fulcrum, the lowering switch is closed when the dial assembly is dialed down, and the dial assembly uses a contact point of the first stopping portion and the first limiting portion as a rotation fulcrum.

4. The control device for a lifting mechanism of claim 1, wherein the paddle assembly is in plug-fit engagement with the mounting box.

5. The control device for the lifting mechanism according to claim 4, wherein the limiting portion is a buckle disposed on a side wall of the pick assembly, a slot is disposed on a side wall of the mounting box, the buckle is clamped in the slot and can move vertically in the slot, and a stopping portion for stopping the buckle vertically is disposed in the slot.

6. The control device for the lifting mechanism according to claim 5, wherein a blocking portion for limiting the lateral movement of the pick assembly is provided outside the slot.

7. The control device for the lifting mechanism according to claim 4, wherein the stopping portion is a buckle disposed on a side wall of the mounting box, a slot is disposed on the limiting portion, and a limiting portion stopped by the buckle is disposed in the slot.

8. The control device for a lifting mechanism according to any of claims 5 to 7, wherein the catch is an elastic catch.

9. The control device for the lifting mechanism according to any one of claims 5 to 7, wherein the dial assembly includes a deep portion which is deep into the mounting box and a toggle portion which is exposed outside the mounting box, the circuit board is provided on the dial assembly, and an up key post for closing the up switch and a down key post for closing the down switch are provided in the mounting box.

10. The control device for a lift mechanism of claim 9, wherein said up key post and said down key post are located below said paddle assembly, said toggle portion being closer to said down switch than said up switch; or the ascending key column and the descending key column are located above the plectrum assembly, and compared with the descending switch, the toggle part is closer to the ascending switch.

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of lifting control, in particular to a control device for a lifting mechanism.

[ background of the invention ]

Along with the promotion of living standard, the intelligence house receives masses favor more and more, and automatic lift platform is the power part of common use in the intelligence house, and automatic lift platform generally uses the motor as power source, adjusts lift platform through control box control mechanical equipment, in order to make lift platform can adjust smoothly between the high low position, is equipped with ascending switch and decline switch on the control box, and its regulation principle is: the ascending switch is touched, the micro control unit of the circuit board in the control box sends an 'upward' instruction to the control box, and the control box controls the motor to rotate forwards to drive the mechanical equipment to do an 'upward' action; and the descending switch is touched, the micro control unit of the circuit board in the control box sends a downward command to the control box, and the control box controls the motor to rotate reversely to drive the mechanical equipment to do downward motion.

The existing control device comprises a mounting box and a plectrum assembly arranged in the mounting box, wherein a lifting switch is triggered by shifting the plectrum assembly; and the shaft hole matching structure has higher requirements on the matching size and surface smoothness of the rotating shaft and the rotating shaft hole, the surfaces of the rotating shaft and the rotating shaft hole are required to be polished, otherwise, the phenomenon of clamping stagnation or loosening is easy to occur.

[ summary of the invention ]

The invention aims to overcome the defects in the prior art and designs a control device for a lifting mechanism.

In order to solve the technical problems, the invention adopts the following technical scheme:

a control device for a lifting mechanism comprises a mounting box, a circuit board and a shifting piece assembly, wherein the mounting box is mounted on the lifting mechanism, the shifting piece assembly partially penetrates into the mounting box, the circuit board comprises an elastic self-resetting lifting switch for controlling lifting, the shifting piece assembly is stirred to close the lifting switch, limiting parts are arranged on two side walls of the shifting piece assembly, the limiting parts and the switch are arranged in a staggered mode along the penetrating direction of the shifting piece assembly, the limiting parts can vertically move along with the shifting piece assembly, and stopping parts are arranged on two side walls of the mounting box;

the plectrum assembly includes free state and stirring state, and under the free state, the vertical backstop spacing portion of backstop portion, under stirring state, the plectrum assembly uses the contact point of backstop portion and spacing portion as the fulcrum rotation.

The beneficial effect of this scheme of adoption:

based on the condition that the shifting sheet assembly is matched with a shaft hole of a mounting box in the prior art, the mounting is inconvenient and the matching requirement is high, in the scheme, a matched structure of a stopping part and a limiting part is arranged between two side walls of the shifting sheet assembly and two side walls of the mounting box, the shifting sheet assembly comprises a natural state and a shifting state in the mounting box, because the lifting switch is an elastic self-reset structure, the lifting switch is in a free state, the stopping part is abutted against the limiting part to stop, when the lifting is required, the shifting sheet assembly is shifted, the shifting sheet assembly rotates and overturns, the lifting switch is pressed, meanwhile, one end of the abutting part of the stopping part and the limiting part is separated, the other end is still abutted to become a rotating fulcrum, because the limiting part and the switch are arranged in a staggered mode along the deep direction of the shifting sheet assembly, the lifting switch is pressed to the maximum stroke position, and two sides and the lifting switch form a plane with a determined position, thereby realize rotating spacing of formation to the plectrum assembly, because the plectrum assembly when rotating, both ends also can vertical motion thereupon around the plectrum assembly, consequently also realized spacing to the plectrum assembly front and back both ends vertical motion stroke through three points, simple structure, the equipment is convenient, and the assembly precision requires lowly, reduces the processing degree of difficulty.

Preferably, the lifting switch includes an ascending switch and a descending switch, the plectrum assembly is stirred to close the ascending switch or the descending switch, the limiting portion includes a first limiting portion and a second limiting portion, the first limiting portion is located between the ascending switch and the descending switch, the second limiting portion is located between the first limiting portion and the descending switch, and the stopping portion includes a first stopping portion matched with the first limiting portion and a second stopping portion matched with the second limiting portion.

Preferably, the lifting switch is closed when the plectrum assembly is subjected to upward shifting, the plectrum assembly takes a contact point of the second stopping portion and the second limiting portion as a rotation fulcrum, the descending switch is closed when the plectrum assembly is subjected to downward shifting, and the plectrum assembly takes a contact point of the first stopping portion and the first limiting portion as a rotation fulcrum.

Preferably, the shifting piece assembly is matched with the mounting box in an inserting mode.

Preferably, the limiting part is a buckle arranged on the side wall of the shifting piece assembly, a clamping groove is formed in the side wall of the mounting box, the buckle is clamped into the clamping groove and can vertically move in the clamping groove, and a stopping part of a vertical stopping buckle is arranged in the clamping groove.

Preferably, a blocking part for limiting the transverse movement of the plectrum assembly is arranged on the outer side of the clamping groove.

Preferably, the stopping part is a buckle arranged on the side wall of the mounting box, a clamping groove is arranged on the limiting part, and a limiting part stopped by the buckle is arranged in the clamping groove.

Preferably, the buckle is an elastic buckle.

Preferably, the plectrum assembly comprises a deep part which is positioned in the deep mounting box and a poking part which is exposed out of the mounting box, the circuit board is arranged on the plectrum assembly, and an ascending key column for closing the ascending switch and a descending key column for closing the descending switch are arranged in the mounting box.

Preferably, the up key post and the down key post are located below the pick assembly, and the toggle portion is closer to the down switch than the up switch; or the ascending key column and the descending key column are located above the plectrum assembly, and compared with the descending switch, the toggle part is closer to the ascending switch.

These features and advantages of the invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The invention is further described with reference to the accompanying drawings in which:

fig. 1 is a schematic perspective view of a control device for a lifting mechanism according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of a control device for a lifting mechanism according to an embodiment of the present invention with an upper cover removed.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an exploded view of a control device for a lift mechanism according to an embodiment of the present invention.

Fig. 5 is a bottom view of a control device for a lifting mechanism in an embodiment of the present invention.

Fig. 6 is a cross-sectional view taken at a-a in fig. 5.

Fig. 7 is a top view of a control device for a lift mechanism in an embodiment of the present invention.

Fig. 8 is a cross-sectional view taken at B-B in fig. 7.

Fig. 9 is a cross-sectional view of a control device for a lift mechanism in an embodiment of the present invention, wherein the paddle assembly is in a pulled-up state.

Fig. 10 is a cross-sectional view of a control device for a lift mechanism in an embodiment of the present invention, wherein the paddle assembly is in a down-set state.

Reference numerals:

mounting the box 1; an upper cover 101; a lower bracket 102; a down key column 1021; the raised key posts 1022; a first card slot 1023; a second card slot 1024; a blocking portion 1025;

a circuit board 2; a down switch 201; a rising switch 202;

a plectrum assembly 3; the deep portion 301; a toggle portion 302; a through hole 303; a housing 3 a; a lower case 3 b;

a first buckle 401; a second clasp 402.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the description of a first feature "on" or "under" a second feature may include the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example (b):

the invention is described in further detail below with reference to the following detailed description and accompanying drawings:

referring to fig. 1 to 8, the control device for a lifting mechanism provided by the invention comprises a mounting box 1 mounted on the lifting mechanism, a circuit board 2 and a shifting piece assembly 3 partially penetrating into the mounting box 1, wherein the circuit board 2 comprises an elastic self-resetting lifting switch for controlling lifting, the shifting piece assembly 3 is stirred to close the lifting switch, two side walls of the shifting piece assembly 3 are provided with limiting parts, the limiting parts and the switch are arranged in a staggered manner along the penetrating direction of the shifting piece assembly 3, the limiting parts can vertically move along with the shifting piece assembly 3, and two side walls of the mounting box 1 are provided with stopping parts;

the plectrum assembly 3 includes free state and stirring state, and under the free state, spacing portion of the vertical backstop of backstop portion, stirring state down, plectrum assembly 3 uses the contact point of backstop portion and spacing portion as the fulcrum rotation.

In the embodiment, the matching structure of the stopping part and the limiting part is arranged between the two side walls of the shifting piece assembly 3 and the two side walls of the mounting box 1, the shifting piece assembly 3 comprises a natural state and a shifting state in the mounting box 1, because the lifting switch is an elastic self-resetting structure, in a free state, the lifting switch is in a free state, the stopping part is abutted with the limiting part, when the lifting is needed, the shifting piece assembly 3 is shifted, the shifting piece assembly 3 is turned over, the lifting switch is pressed, meanwhile, one end of the abutting part of the stopping part and the limiting part is brought apart, the other end is still abutted to be a rotating fulcrum, because the limiting part and the switch are arranged along the deep direction of the shifting piece assembly 3 in a staggered mode, the lifting switch is pressed to the maximum stroke position, the two supporting points on the two sides and the three points of the lifting switch form a plane with a determined position, so that the limiting formed by the rotation of the shifting piece assembly 3 is realized, and when the shifting piece assembly 3 is shifted, both ends also can vertical motion thereupon around the plectrum assembly 3, consequently also realized spacing to both ends vertical motion stroke around the plectrum assembly 3 through three points, backstop portion and spacing portion backstop structure's spacing intensity is higher, and spacing effect is better, simple structure, simple to operate, and the assembly precision requires lowly, reduces the assembly and the processing degree of difficulty.

As shown in fig. 2, the pick assembly 3 includes a deep portion 301 located deep into the mounting box 1 and a pick portion 302 exposed out of the mounting box 1, the circuit board 2 is disposed on the pick assembly 3, specifically, the pick assembly 3 includes an upper housing 3a and a lower housing 3b, a containing cavity is formed between the upper housing 3a and the lower housing 3b, and the circuit board 2 is disposed in the containing cavity.

As shown in fig. 6 and 8, the up-down switch on the circuit board 2 includes an up-down switch 202 and a down-down switch 201, and an up-down key pole 1022 for closing the up-down switch 202 and a down-down key pole 1021 for closing the down-down switch 201 are provided in the mounting case 1.

The plectrum assembly 3 is pulled to close the ascending switch 202 or the descending switch 201, the plectrum assembly 3 turns over and gradually approaches the ascending key column 1022 or the descending key column 1021, and the key column gradually extrudes the ascending switch, so that the ascending switch is closed.

Because the lifting of the lifting platform is in the opposite process and cannot be carried out simultaneously, in order to realize the respective control of the lifting switch 202 and the descending switch 201, namely, only one switch can be controlled by implementing one action, one of the lifting switch 202 and the descending switch 201 is controlled during upward dialing, the other is controlled during downward dialing, in order to improve the use safety, preferably, the lifting switch 202 is closed when the toggle part 302 is subjected to upward dialing, the descending switch 201 is closed when the toggle part 302 is subjected to downward dialing, if obstacles exist on the periphery of the lifting platform in the descending process, the obstacles descend to the obstacles, the bottom end of the toggle part 302 is stopped by the obstacles, meanwhile, the deep part 301 continuously descends along with the lifting platform, the toggle part 302 is upward dialed, the lifting switch 202 is triggered, the lifting platform is controlled to reversely move upwards, and the plectrum assembly 3 and the obstacles are prevented from being extruded to cause damage; if the periphery of the lifting platform has the obstacles in the rising process, the working principle of the lifting platform is similar to that of the periphery of the lifting platform in the falling process, the movement process is opposite, and the operation is not repeated one by one, so that the automatic obstacle avoiding function of the lifting platform is realized, other obstacle avoiding parts are not needed to be additionally arranged, the structure is simplified, and the cost is saved.

Because the closed rising switch 202 and the falling switch 201 stir opposite direction, need to dial up with dial down respectively spacingly, spacing portion includes first spacing portion and the spacing portion of second, and first spacing portion is located between rising switch 202 and the falling switch 201, and the spacing portion of second is located between first spacing portion and the falling switch 201, and backstop portion includes with first spacing portion complex first backstop portion and with the spacing portion complex second backstop portion of second. When the plectrum assembly 3 is pulled up, the lifting switch 202 is closed, the plectrum assembly 3 takes the contact point of the second stopping part and the second limiting part as a rotating fulcrum, and at the moment, because the first limiting part is positioned between the lifting switch 202 and the second limiting part, the first limiting part moves to the direction far away from the first stopping part along with the lifting switch 202; closed decline switch 201 when plectrum assembly 3 receives down to dial, plectrum assembly 3 uses the contact point of first backstop portion and first spacing portion as the rotation fulcrum, because the spacing position of second is between decline switch 201 and first spacing portion, therefore, the spacing portion of second is followed and is risen switch 202 to the direction motion of keeping away from second backstop portion, when closed rise switch 202 and decline switch 201, plectrum assembly 3 rotates the fulcrum and is different, compare in the middle structure that sets up the axis of rotation of traditional lift switch, the distance of rotating the fulcrum apart from lift switch in this embodiment is farther, the rocking arm is bigger, during the same distance of the vertical motion of stirring portion 302, plectrum assembly 3 turned angle is littleer, stability is higher.

The control device for the lifting mechanism of the present invention is specifically described below with reference to the accompanying drawings:

referring to fig. 1 to 8, according to an embodiment of the present invention, the mounting box 1 includes an upper cover 101 and a lower bracket 102 which are fixedly assembled, a deep portion 301 of the pick assembly 3 is deep between the upper cover 101 and the lower bracket 102 and is connected to the lower bracket 102, preferably, the pick assembly 3 is in inserting fit with the lower bracket 102, specifically, the limiting portion is a buckle disposed on two side walls of the pick assembly 3, and two side walls of the lower bracket 102 are disposed with a slot, and the buckle is clamped in the slot and can move vertically in the slot.

In order to make the buckle change the card go into the draw-in groove, the preferred elasticity buckle of buckle, the buckle is popped out again in the draw-in groove of card income after the extrusion shrink, 3 lateral walls of plectrum assembly and 1 lateral wall clearance of mounting box are as little as possible after the assembly, reduce plectrum assembly 3 and rock about, simultaneously, as shown in fig. 3, the draw-in groove outside is equipped with stop 1025 to horizontal backstop elasticity buckle, thereby restriction plectrum assembly 3 rocks about, improve plectrum assembly 3 horizontal direction's stability in mounting box 1.

As shown in fig. 3 and 8, a stopping portion of the vertical stopping buckle is arranged in the clamping groove, preferably, the upper wall or the lower wall of the clamping groove forms the stopping portion, so that other stopping components do not need to be additionally arranged, the structure is simplified, the cost is saved, meanwhile, the two side walls of the clamping groove also play a role in limiting the front end and the rear end of the buckle, and the front and the rear ends of the shifting piece assembly 3 are limited to move back and forth.

The plectrum assembly 3 is limited horizontally by the blocking part 1025 and the two side walls of the clamping groove, so that the plectrum assembly 3 can only move vertically.

In order to better comply with the assembly rule and the usage habit of the user, in the embodiment, as shown in fig. 6 and 8, the up key post 1022 and the down key post 1021 are located below the blade assembly 3, i.e. are disposed on the lower bracket 102, and compared with the up switch 202, the toggle portion 302 is closer to the down switch 201, as shown in fig. 4, the lower casing 3b is provided with a through hole 303 for the up key post 1022 and the down key post 1021 to pass through.

In order to cooperate with the ascending switch 202 and the descending switch 201, as shown in fig. 2 to fig. 4 and fig. 8, a first buckle 401 serving as a first limiting portion and a second buckle 402 serving as a second limiting portion are respectively disposed on a side wall of the pick assembly 3, the first buckle 401 is located between the ascending switch 202 and the descending switch 201, the second buckle 402 is located between the first buckle 401 and the descending switch 201, a first clamping groove 1023 for the first buckle 401 to be clamped in and a second clamping groove 1024 for the second buckle 402 to be clamped in are disposed on a side wall of the lower bracket 102, an upper wall of the first clamping groove 1023 forms a first blocking portion, and an upper wall of the second clamping groove 1024 forms a second blocking portion.

In a free state, the rising switch 202 is arranged on the rising key column 1022, the falling switch 201 is arranged on the falling key column 1021, because the rising switch 202 and the falling switch 201 are elastic switches, and the plectrum assembly 3 can be lifted upwards, the first buckle 401 abuts against the upper wall of the first card slot 1023, the second buckle 402 abuts against the upper wall of the second card slot 1024, when the plectrum is pulled downwards, as shown in fig. 10, the first buckle 401 rotates with the front side contact of the first card slot 1023 as a fulcrum, the falling switch 201 moves downwards, the second buckle 402 also moves downwards in the second card slot 1024, the falling switch 201 is deformed by the resistance of the falling key column 1021 in the downward movement process, and when the deformation amount of the falling switch 201 reaches the conduction stroke of the falling switch 201, a falling signal is sent outwards; when dialing up, as shown in fig. 9, the rear side contact of the second buckle 402 and the second card slot 1024 is used as a fulcrum to rotate, the ascending switch 202 moves downward, the first buckle 401 also moves downward in the first card slot 1023, the ascending switch 202 deforms due to resistance of the ascending key column 1022 in the downward movement process, when the deformation of the ascending switch 202 reaches the conduction stroke of the ascending switch 202, an ascending signal is sent outward, and the elastic switch brings hand feeling for the downward movement of the plectrum assembly 3.

Realize the installation of plectrum assembly 3 in mounting box 1 and stir through above-mentioned two buckle draw-in groove cooperation structures, vertical spacing is more accurate reliable, stirs the in-process and only the contact point department atress of side and draw-in groove upper wall on the buckle, therefore the assembly chamfer big enough can be done to the buckle downside, makes the assembly between the part more convenient, breaks original pivot structure simultaneously, reduces the influence of pivot friction to feeling.

Of course, in other embodiments, the card slot may be disposed on the upper cover.

According to an embodiment of the present invention, the stopping portion may also be a buckle disposed on a side wall of the mounting box, a slot is disposed on the pick assembly, and a limiting portion stopped by the buckle is disposed in the slot.

According to an embodiment of the invention, the limiting part can also be a sliding block arranged on the side wall of the shifting sheet assembly, a sliding groove is arranged on the side wall of the mounting box, and a stopping part is arranged at the end part of the sliding groove; or, the stopping part can also be a sliding block arranged on the side wall of the mounting box, a sliding groove is arranged on the side wall of the shifting piece assembly, and a limiting part is arranged at the end part of the sliding groove.

According to one embodiment of the present invention, the up key post and the down key post are located above the paddle assembly, where the toggle portion is closer to the up switch than to the down switch.

According to an embodiment of the present invention, the dial plate assembly may also be configured such that the down switch is closed when the dial portion is dialed up, and the up switch is closed when the dial portion is dialed down, and at this time, positions of the up switch and the down switch, and positions of the up key post and the down key post may be adjusted accordingly according to operation requirements.

While the foregoing is directed to embodiments of the present invention, the scope of the invention should not be limited thereby, and it will be apparent to those skilled in the art that the invention includes, but is not limited to, those illustrated in the drawings and described in the foregoing detailed description. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.