CN202796592U

CN202796592U - Knob switch

Info

Publication number: CN202796592U
Application number: CN 201220336741
Authority: CN
Inventors: 崔长德
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-16
Filing date: 2012-07-12
Publication date: 2013-03-13
Anticipated expiration: 2022-07-12

Abstract

The utility model discloses a knob switch which comprises a printed circuit board, a gear knob, a wiring terminal, a variable resistor group, a thyristor and a capacitor. The wiring terminal is electrically connected with the printed circuit board. The gear knob is fixed on the printed circuit board and is electrically connected with and controls the thyristor through the variable resistor group. According to the utility model, the thyristor and the variable resistor group are used; a G pin turn-on angle of the thyristor is controlled through the change of a resistance value, thus output power is changed and the rotating speed of a single speed motor can be controlled and adjusted; and multi-gear adjustment and control can be carried out on a food processor by using the single speed motor.

Description

A kind of knob switch

Technical field

The utility model relates to switch, relates in particular to a kind of knob switch for food cooking machine.

Background technology

The existing general fully mechanical of switch that is used for food cooking machine need to use multispeed electric machine when needs are realized the effect of the many rotating speeds of many gears, increased product complexity, and cost is increased.

The utility model content

The purpose of this utility model is that existing food cooking machine switch is fully mechanical, if make food cooking machine have the defective of many gear regulation and control, also need to use the defective of multispeed electric machine, a kind of knob switch that can realize many rotating speeds of the many gears of food cooking machine effect that cooperates with single-speed motor is provided.

The technical solution of the utility model is: a kind of knob switch, comprise PCB (Printed Circuit Board, printed circuit board), gear knob, binding post, variable resistor group, controllable silicon and electric capacity, binding post is electrically connected with PCB, and the gear knob is fixed on PCB upward and is electrically connected and the control controllable silicon by the variable resistor group.

Described variable resistor group comprises the different resistance of a plurality of resistances that are connected in parallel.

Described gear knob comprises plastic stent, spin axis, contact lever, turriform spring, cylindrical spring, button spring and a plurality of contact, spin axis is fixed on the plastic stent, contact lever is stuck in the in-line groove of spin axis, the contact lever top is provided with cylindrical spring, the contact lever below is provided with the turriform spring, the button spring is fixed on spin axis upper end, contact lever along with the rotation of spin axis be fixed on plastic stent on contact respectively with a plurality of contacts of PCB electrical connection.The too large strength of expense not when turriform spring and cylindrical spring rotate spin axis, the installation of column type spring can better contact with contact contact lever, thereby reach the good transition of each gear, and the effect of dress button spring is to make knob automatically revert to 0 file location from the position of crawl on the spin axis.

The binding post plugged makes the work of its controllable silicon G pin connect circuit by capacitor trigger SCR control utmost point K pin, the motion of spin axis rotating contact bar, and reach the gear transition by the control of the resistance in the variable resistor and adjust the machine operation rotating speed.

The beneficial effects of the utility model:

1, the utility model adopts controllable silicon and variable resistor group, the change control controllable silicon G pin angle of flow by resistance value, thereby power output is changed the rotating speed of single-speed motor can be controlled and adjust, realized that food cooking machine uses single-speed motor also to regulate and control by many gears.

2, knob switch of the present utility model is installed, dismantles simple.

Description of drawings

Fig. 1 is the perspective view of knob switch of the present utility model;

Fig. 2 is the decomposition texture schematic diagram of knob switch of the present utility model;

Fig. 3 is the circuit theory diagrams of knob switch of the present utility model.

Embodiment

Below in conjunction with accompanying drawing knob switch of the present utility model is elaborated.

Referring to Fig. 1-Fig. 2, a kind of knob switch comprises PCB1, gear knob, binding post 9, variable resistor group 12, controllable silicon 11 and electric capacity 10, binding post 9 is electrically connected with PCB1, and the gear knob is fixed on PCB1 upward and is electrically connected and control controllable silicon 11 by variable resistor group 12.

Referring to Fig. 2, variable resistor group 12 comprises the different resistance of a plurality of resistances that are connected in parallel.The visible Fig. 3 of the circuit diagram of variable resistor group 12.

Described gear knob comprises plastic stent 2, spin axis 4, contact lever 5, turriform spring 6, cylindrical spring 7, button spring 8 and a plurality of contact 3, spin axis 4 is fixed on the plastic stent 2, contact lever 5 is stuck in the in-line groove interior (seeing Fig. 2) of spin axis 4, contact lever 5 tops are provided with cylindrical spring 7, cylindrical spring 7 can snap in the cylindrical groove of spin axis 4 lower ends, contact lever 4 belows are provided with turriform spring 6, button spring 8 is fixed on spin axis 4 upper ends, contact lever 5 along with the rotation of spin axis 4 be fixed on plastic stent 2 on contact respectively with a plurality of contacts 3 that PCB1 is electrically connected.

Binding post 9 pluggeds, trigger the K pin of controllable silicon 11 by electric capacity 10, make the G pin work of its controllable silicon 11 connect circuit, spin axis 4 rotarily drives contact lever 5 motions and makes motor rotation, spin axis 4 turns left and drives contact lever 5 and contact with contact 3 and reach left crawl effect, and different resistance in the conducting of the different contacts 3 control variable resistor group are adjusted the machine operation rotating speed thereby reach each gear transition.

Claims

1. knob switch, it is characterized in that, described switch comprises printed circuit board, gear knob, binding post, variable resistor group, controllable silicon and electric capacity, binding post is electrically connected with printed circuit board, and the gear knob is fixed on the printed circuit board and by the variable resistor group and is electrically connected and the control controllable silicon.

2. knob switch as claimed in claim 1 is characterized in that, described variable resistor group comprises the different resistance of a plurality of resistances that are connected in parallel.

3. knob switch as claimed in claim 1, it is characterized in that, described gear knob comprises plastic stent, spin axis, contact lever, turriform spring, cylindrical spring, button spring and a plurality of contact, spin axis is fixed on the plastic stent, contact lever is stuck in the in-line groove of spin axis, the contact lever top is provided with cylindrical spring, the contact lever below is provided with the turriform spring, the button spring is fixed on spin axis upper end, contact lever along with the rotation of spin axis be fixed on plastic stent on contact respectively with a plurality of contacts of printed circuit board electrical connection.