CN209488549U - A kind of key circuit for electric bicycle - Google Patents

Abstract

The utility model discloses a kind of key circuits for electric bicycle, key circuit includes first capacitor C1, second capacitor C2, first magnetic bead L1, second magnetic bead L2, control switch and button assembly, one end of control switch is grounded, the other end of control switch is connect with one end of the first magnetic bead L1, switching signal end connection in the other end and connection cables of first magnetic bead L1, signaling interface end in connection cables is connect by the second magnetic bead L2 with one end of first capacitor C1, the other end of first capacitor C1 is connect with the interface of the ground wire end in one end and connection cables of the second capacitor C2 respectively, power supply interface end connection in the other end and connection cables of second capacitor C2, connection cables are connect with the instrument on electric bicycle, the both ends parallel connection button assembly of first capacitor C1；Its effect is: when button is pressed in button assembly, the case where effectively reducing because of electromagnetic interference, and analog voltage is caused to fluctuate, improving the reliability and stability of utility model works.

Description

A kind of key circuit for electric bicycle

Technical field

The utility model belongs to key circuit technical field, and in particular to a kind of key electricity for electric bicycle Road.

Background technique

Instrument on electric bicycle is located in centre, and wherein operation button is in left side, and centre passes through one Terminal connects, and the number of cables of this terminal is more, it is meant that terminal can be thicker, influence whether aesthetics, and valence Lattice also can be higher, meanwhile, the key circuit of the prior art is in use, therefore the problem of being easy to appear electromagnetic interference needs one The improved key circuit of kind.

Summary of the invention

The a kind of for electric bicycle of electromagnetism interference can be effectively improved the purpose of the utility model is to provide a kind of Key circuit.

The technical solution that the utility model is taken are as follows: a kind of key circuit for electric bicycle, the key circuit Including first capacitor C1, the second capacitor C2, the first magnetic bead L1, the second magnetic bead L2, control switch and button assembly, the control is opened One end of pass is grounded, and the other end of the control switch is connect with one end of the first magnetic bead L1, the first magnetic bead L1's The other end is connect with the switching signal end in connection cables, and the signaling interface end in the connection cables passes through second magnetic bead L2 is connect with one end of the first capacitor C1, the other end of first capacitor C1 one end with the second capacitor C2 respectively It is connected with the interface of the ground wire end in connection cables, the power supply interface end in the other end and connection cables of the second capacitor C2 connects It connects, the connection cables are connect with the instrument on electric bicycle, the both ends of the first capacitor C1 button assembly in parallel.

Preferably, the button assembly includes the n switch sub-circuits being arranged in parallel.

Preferably, the value range of the n is n >=1.

Preferably, respectively switch sub-circuit structure it is identical, each switch sub-circuit include a button switch and The divider resistance concatenated with the button switch.

Preferably, respectively the resistance value of the divider resistance in switch sub-circuit is different.

By adopting the above technical scheme, have the advantage that the utility model proposes it is a kind of for electric bicycle by Key circuit at work, can be effectively reduced because of electromagnetism when button is pressed in button assembly by the capacitor and magnetic bead being equipped with The case where interfering, and analog voltage is caused to fluctuate, improves the reliability and stability of utility model works.

Detailed description of the invention

Fig. 1 is the electrical block diagram of the utility model embodiment.

Specific embodiment

In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, below in conjunction with attached drawing And specific embodiment is described in detail, description here is not meant that corresponding to all of the specific example stated in embodiment Theme all refers in the claims.

Referring to Fig.1 shown in, a kind of key circuit for electric bicycle, the key circuit include first capacitor C1, Second capacitor C2, the first magnetic bead L1, the second magnetic bead L2, control switch and button assembly, one end ground connection of the control switch, institute The other end for stating control switch is connect with one end of the first magnetic bead L1, the other end and connection cables of the first magnetic bead L1 In the connection of switching signal end, the signaling interface end in the connection cables passes through the second magnetic bead L2 and the first capacitor One end of C1 connects, the other end of the first capacitor C1 respectively with the ground in one end and connection cables of the second capacitor C2 Line interface end connects, the power supply interface end connection in the other end and connection cables of the second capacitor C2, the connection cables It is connect with the instrument on electric bicycle, the both ends of the first capacitor C1 button assembly in parallel.

In specific implementation, which can be integrated on pcb board, and the first capacitor C1 and the second capacitor C2 are used Monolithic capacitor；Using monolithic capacitor with using compared with traditional ceramic disc capacitor, be influenced by temperature it is small, be not likely to produce temperature drift, have Conducive to the reliability for improving its work, it is particularly suitable for applications in this field of electric bicycle, is not concerned about and will receive extraneous sunlight Exposure.J4 in Fig. 1 is switching signal end, and J3 is signaling interface end, and J2 is power supply interface end, and J1 is interface of the ground wire end, SK For control switch, in application, corresponding charging interface can will be arranged in the equipment of the application circuit is that mobile phone charge.This reality With novel capacitor and magnetic bead by being equipped with, at work, can effectively reduce because electromagnetism is dry when button is pressed in button assembly The case where disturbing, and analog voltage is caused to fluctuate improves the reliability and stability of utility model works.

In application, the button assembly includes the n switch sub-circuits being arranged in parallel, the value range of n is n >=1；At this In embodiment, it is described with 3 switch sub-circuits, from figure 1 it appears that respectively the structure of switch sub-circuit is identical, it is each A switch sub-circuit includes a button switch and the divider resistance concatenated with the button switch, each switch electricity The resistance value of divider resistance in road is different；That is, the button switch in key circuit is at least one, it can also basis The switch sub-circuit of the needs of the application in parallel quantity that suits the requirements again, quantity employed in the present embodiment are merely illustrative, It is not limited；By the series connection pressure divider circuit constituted using button switch series resistance, when according to each push-botton operation, Different voltage division signals is generated, is sent to the instrument on electric bicycle by connection cables, triggering instrument realizes corresponding button Operation, effectively reduce the quantity of signal wire, also can simplified push button lead-out wire to a certain extent, improve its aesthetics.

Here, it is to be noted that, the utility model relates to function, algorithm, method etc. be only the prior art routine Adaptability application.Therefore, improvement of the utility model for the prior art, the connection relationship being substantially between hardware, rather than Although it is related to some functions, algorithm, method for function, algorithm, method itself namely the utility model, but and does not include pair The improvement that function, algorithm, method itself propose.Description of the utility model for function, algorithm, method, is in order to better Illustrate the utility model, to better understand the utility model.

Finally, it should be noted that foregoing description is the preferred embodiment of the utility model, the ordinary skill people of this field Member under the premise of without prejudice to the utility model aims and claim, can make a variety of under the enlightenment of the utility model Similar expression, such transformation are each fallen within the protection scope of the utility model.

Claims (5)

1. a kind of key circuit for electric bicycle, which is characterized in that the key circuit includes first capacitor C1, second Capacitor C2, the first magnetic bead L1, the second magnetic bead L2, control switch and button assembly, one end ground connection of the control switch, the control The other end of system switch is connect with one end of the first magnetic bead L1, in the other end and connection cables of the first magnetic bead L1 Switching signal end connects, and the signaling interface end in the connection cables passes through the second magnetic bead L2's and first capacitor C1 One end connection, the other end of the first capacitor C1 connect with the ground wire in one end and connection cables of the second capacitor C2 respectively Mouth end connects, the power supply interface end connection in the other end and connection cables of the second capacitor C2, the connection cables and electricity Instrument connection on dynamic bicycle, the both ends of the first capacitor C1 button assembly in parallel.

2. a kind of key circuit for electric bicycle according to claim 1, which is characterized in that the button assembly The switch sub-circuit being arranged in parallel including n.

3. a kind of key circuit for electric bicycle according to claim 2, which is characterized in that the value of the n Range is n >=1.

4. a kind of key circuit for electric bicycle according to claim 2, which is characterized in that respectively switch sub-circuit Structure it is identical, each switch sub-circuit includes that a button switch and concatenate with the button switch one divide Resistance.

5. a kind of key circuit for electric bicycle according to claim 4, which is characterized in that respectively switch sub-circuit In divider resistance resistance value it is different.