CN217333868U

CN217333868U - Round pedal structure with multi-state output

Info

Publication number: CN217333868U
Application number: CN202220497843.7U
Authority: CN
Inventors: 杨俊生; 梁叶明
Original assignee: Foshan Coxo Medical Instrument Co ltd
Current assignee: Foshan Coxo Medical Instrument Co ltd
Priority date: 2022-03-07
Filing date: 2022-03-07
Publication date: 2022-08-30
Anticipated expiration: 2032-03-07

Abstract

The utility model provides a circular pedal structure of multistation output. Relates to an improvement of a switch structure of a dental instrument. A circular footrest structure capable of realizing state output of three-state control is provided. The novel multifunctional pedal comprises a pedal and a base, wherein a plurality of microswitches are fixed on the base, the pedal is sleeved on the base and moves in a reciprocating mode in the height direction of the base, and the microswitches are uniformly distributed on the base and are arranged on the lower end face of the pedal and between the base. And the micro switches in each key group are connected in parallel. Therefore, when the pedal is treaded down to different positions, the micro switches at different positions are switched on, and the switching between different states except the on state and the off state is realized, so that the switching of different powers of the dental instrument is realized, and the dental instrument is more convenient.

Description

Round pedal structure with multi-state output

Technical Field

The utility model relates to a dental medical appliance, in particular to an improvement of a switch structure of a dental appliance.

Background

The dental instrument usually uses a pedal switch to control the power output of the dental instrument, the existing pedal switch can only realize on or off two-state control, and can not meet the requirement of the dental instrument on the control power intensity degree, the lower part of a panel of the existing conventional pedal switch is connected with a plurality of buttons or micro switches in parallel, so that two actions of correspondingly stepping down and loosening are output in two states of closing and opening when stepping down, the plurality of buttons or micro switches added only increase the stepping sensitivity degree, and three or more-state control can not be realized.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a circular pedal structure which can realize the state output of three state controls.

The utility model discloses a following technical scheme realizes: the utility model provides a circular pedal structure of multistation output, includes footboard and base, fixed a plurality of micro-gap switches on the base, the footboard cover is located on the base and follow the direction of height reciprocating motion of base, the micro-gap switch equipartition in on the base and arrange in the lower terminal surface of footboard with between the base.

A plurality of pressure springs are arranged on the base, one ends of the pressure springs are fixed on the base, and the other ends of the pressure springs abut against one side of the pedal opposite to the base;

the middle of the base is provided with a power supply for supplying power to the micro-switches, the pressure springs are uniformly distributed along the edge of the base by taking the power supply as the center, and at least one micro-switch is arranged on the base between every two adjacent pressure springs.

The pressure spring divides the micro switches into at least three key groups, the key groups are connected in parallel on the power supply, and the micro switches in each key group are connected in parallel.

The key set comprises a first key set, a second key set and a third key set, and the power supply, the first key set, the second key set and the third key set are connected in parallel.

The first key set and the second key set have the same structure and comprise a first microswitch, a second microswitch and a third microswitch, and the first microswitch, the second microswitch and the third microswitch are connected in parallel and then are connected with a first divider resistor.

The third key group comprises a fourth micro switch and a fifth micro switch, and the fourth micro switch and the fifth micro switch are connected in parallel and then connected with a second voltage dividing resistor. The middle of the base is provided with a positioning column, the position of the pedal corresponding to the spring is provided with the positioning column, and the positioning columns are sleeved with the pressure springs in a one-to-one correspondence mode.

Compared with the prior art, the utility model discloses it is a plurality of micro-gap switch divide into at least three according to the key set, according to the key set parallelly connected on the power, every according to the micro-gap switch parallel connection in the key set. Like this when the pedal tramples the micro-gap switch of different positions of switch-on when the different positions of footboard, realize except opening, switch-over between the different states except that closing, thereby realize the switching of the different power of dental instrument, it is more convenient, all micro-gap switches are switched on (all key group switch-ons promptly) when trampling whole footboard, realize the switch-on of circuit, and all micro-gap switches restore to off-state (all key group switch-offs promptly) when whole unclamping the footboard, and only switch-on part micro-gap switch (only partial key group switch-on promptly) when trampling the side of footboard, like this through discerning the switch-on and off state of all key groups, thereby realize except opening, the switching between the different states except that closing, thereby realize the switching of the different powers of dental instrument.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the base structure of the present invention;

FIG. 3 is a sectional view of the internal structure of the present invention;

FIG. 4 is a schematic diagram of the circuit structure of the present invention;

fig. 5 is a schematic diagram of a circuit structure of the first key set and the second key set of the present invention;

fig. 6 is a schematic diagram of a circuit structure of a third key set of the present invention;

in the figure: 1. a first key group; 2. a second key group; 3. a third key group; 4. a first microswitch, 5 and a second microswitch; 6. a third microswitch; 7. a first voltage dividing resistor; 8. a fourth microswitch; 9. a fifth microswitch; 10. a second voltage dividing resistor; 11. a pedal; 12. a base; 13. and (5) pressing a spring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1-5, a round pedal structure with multi-state output comprises a pedal 11 and a base 12, wherein a plurality of micro switches are fixed on the base 12, the pedal 11 is sleeved on the base 12 and reciprocates along the height direction of the base, and the micro switches are uniformly distributed on the base and are arranged between the lower end surface of the pedal and the base. When the pedal is pressed down, the surface of the pedal opposite to the base can press the microswitch.

A plurality of pressure springs are arranged on the base, one ends of the pressure springs are fixed on the base, and the other ends of the pressure springs abut against one side of the pedal opposite to the base; the middle of the base is provided with a power supply for supplying power to the micro switches, the pressure springs are uniformly distributed along the edge of the base by taking the power supply as the center, at least one micro switch is arranged on the base between every two adjacent pressure springs, when different areas of the pedal are pressed, the corresponding pressure springs are compressed, so that the pedal in the corresponding area is lowered, other areas of the pedal are propped by the action of the pressure springs right below the pedal and hardly move downwards, the area subjected to the pressure is pressed down to touch the corresponding micro switches, thus when the pedal is stepped on at different positions, the micro switches in different positions are switched on, the switching between different states except the opening state and the closing state is realized, the switching of different powers of the dental instruments is realized, the convenience is improved, when the whole pedal is stepped on, all the micro switches are switched on (namely all key groups are switched on), the circuit is switched on, all the microswitches are reset to be in an off state (namely all key groups are switched off) when the pedal is released, and only part of the microswitches are switched on (namely only part of the key groups are switched on) when the side edge of the pedal is stepped, so that the switching between different states except for the on state and the off state of all the key groups is realized by identifying the on state and the off state of all the key groups, and the switching of different powers of the dental instrument is realized.

The micro switches are divided into at least three key groups, the key groups are connected in parallel on the power supply, and the micro switches in each key group are connected in parallel. When the position of trampling is the centre of two button groups, two button groups are the on-state, but because still have the existence of extra only a button group to avoid when trampling the side characteristic position of footboard with the same problem of the state of button group when whole footboard was trampled.

The key set comprises a first key set 1, a second key set 2 and a third key set 3, and the power supply, the first key set 1, the second key set 2 and the third key set 3 are connected in parallel. The first key set 1 and the second key set 2 have the same structure and comprise a first microswitch, a second microswitch and a third microswitch 6, and the first microswitch, the second microswitch and the third microswitch 6 are connected in parallel and then connected with a first divider resistor 7. The third key group 3 comprises a fourth micro switch 8 and a fifth micro switch 9, and the fourth micro switch 8 and the fifth micro switch 9 are connected in parallel and then connected with a second voltage dividing resistor 10. When all the microswitches are closed, switch contacts of the microswitches are connected to the negative pole of a power supply (the switch contact level of the microswitches is 0), when all the microswitches are disconnected, the switch contacts of the microswitches are suspended (the switch contact level of the microswitches is power supply voltage), when edges are stepped on, one or two of all key groups are connected, at the moment, the switch contact level of one group of the microswitches is inconsistent with the switch contact levels of the other two groups, and therefore voltage changes of the switch contacts of different key groups are identified, and different switch states of the whole circular pedal structure are achieved. The output states of the key group in the different states are presented below in tabular form, where a "0" or "1" in the logical states represents only the output state of the key group, regardless of the actual output.

The states of the key set when the pedal is not depressed are shown in table 1:

TABLE 1

	Out1	Out2	Out3
				Logic state	1	1	1

The states of the key groups when the pedal portion is depressed (i.e., the edge of the pedal is depressed) are shown in table 2:

TABLE 2

	Out1	Out2	Out3
				Logic state 1	0	1	1
Logic state 2	1	0	1
				Logic state 3	1	1	0
Logic state 4	0	0	1
				Logic state 5	1	0	0
Logic state 6	0	1	0

The states of the key set when the pedal is fully depressed are shown in table 3:

TABLE 3

	Out1	Out2	Out3
				Logic state	0	0	0

The middle of base is equipped with the reference column, the footboard cover is established on the reference column, the pressure spring is established to the cover on the reference column, the one end of pressure spring is fixed on the lower terminal surface of footboard, the other end of pressure spring is fixed on the base. When the pedal is stepped on, the pressure spring compresses to store energy, and when the pedal is released, the pressure spring resets to drive the pedal to reset, so that the micro switch is controlled to be opened and closed.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides a circular pedal structure of multistation output, includes footboard and base, its characterized in that: the base is fixedly provided with a plurality of micro switches, the pedal is sleeved on the base and moves in a reciprocating mode along the height direction of the base, and the micro switches are uniformly distributed on the base and are arranged between the lower end face of the pedal and the base.

2. The multi-state output circular pedaling structure as defined in claim 1, further comprising: a plurality of pressure springs are arranged on the base, one ends of the pressure springs are fixed on the base, and the other ends of the pressure springs abut against one side of the pedal opposite to the base;

3. The multi-state output circular pedaling structure as defined in claim 2, further comprising: the pressure spring divides the micro switches into at least three key groups, the key groups are connected in parallel on the power supply, and the micro switches in each key group are connected in parallel.

4. A multi-state output circular footrest structure according to claim 3, characterized in that: the key group comprises a first key group, a second key group and a third key group, and the power supply, the first key group, the second key group and the third key group are connected in parallel.

5. A multi-state output circular pedaling structure according to claim 4, wherein: the first key set and the second key set have the same structure and comprise a first microswitch, a second microswitch and a third microswitch, and the first microswitch, the second microswitch and the third microswitch are connected in parallel and then are connected with a first divider resistor.

6. The multi-state output circular pedaling structure as defined in claim 4, further comprising: the third key group comprises a fourth micro switch and a fifth micro switch, and the fourth micro switch and the fifth micro switch are connected in parallel and then connected with a second voltage dividing resistor.

7. The multi-state output circular pedaling structure as defined in claim 2, further comprising: the middle of base is equipped with the reference column, the position that corresponds the pressure spring on the footboard is equipped with the reference column, the pressure spring one-to-one cover is established on the reference column.