CN216530523U

CN216530523U - Sensor circuit applied to intelligent door lock

Info

Publication number: CN216530523U
Application number: CN202122300185.6U
Authority: CN
Inventors: 黄晓瑜
Original assignee: Huizhou Goldman Sachs Light Display Technology Co ltd
Current assignee: Huizhou Goldman Sachs Light Display Technology Co ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-05-13
Anticipated expiration: 2031-09-18

Abstract

The utility model relates to the technical field of circuit design, and discloses a sensor circuit applied to an intelligent door lock, which comprises an overcurrent protection module, a groove-shaped photoelectric sensor and a switch module, wherein the groove-shaped photoelectric sensor is electrically connected with the overcurrent protection module; and the switch module comprises a first microswitch and a second microswitch, and the first microswitch and the second microswitch are respectively and electrically connected with the overcurrent protection module. By arranging the first microswitch and the second microswitch, the quick-acting mechanism of the microswitch can instantaneously switch the connection points, so that the arc duration is short, and the connection points can be switched at the same position basically even if the microswitch is repeatedly opened or closed, thereby protecting the connection points; through setting up overcurrent protection module, can effectually prevent that the circuit from because artificial destruction and electromagnetic actuator cause the electric current that flows through solenoid too big because of some reason and burning out the coil.

Description

Sensor circuit applied to intelligent door lock

Technical Field

The utility model relates to the technical field of structural engineering, in particular to a sensor circuit applied to an intelligent door lock.

Background

When the intelligent door lock at the present stage is used for closing an electronic circuit, arcs are generated between contacts, the arcs are easier to generate when the current is larger, the speed of switching the contacts is slower, the arc occurrence time is longer, and the contacts are easy to damage. Further, the intelligence lock at present stage does not protect the circuit, when appearing artificial destruction or when the electric current was too high suddenly, the condition of damage can appear in the lock, and then can't unblank.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a sensor circuit applied to an intelligent door lock, which can reduce the arc duration, further protect a contact and protect the intelligent door lock so as to prevent the door lock from being damaged by artificial damage or sudden overhigh current.

The purpose of the utility model is realized by the following technical scheme:

a sensor circuit for use with an intelligent door lock, comprising:

an overcurrent protection module;

the groove-shaped photoelectric sensor is electrically connected with the overcurrent protection module; and

the switch module comprises a first microswitch and a second microswitch, and the first microswitch and the second microswitch are respectively and electrically connected with the overcurrent protection module.

In one embodiment, the overcurrent protection module comprises a capacitor C11, a capacitor C4 and a capacitor C10, wherein one end of the capacitor C11 is electrically connected to the groove-type photosensor, the other end of the capacitor C11 is grounded, one end of the capacitor C4 is electrically connected to the groove-type photosensor, the other end of the capacitor C4 is grounded, one end of the capacitor C10 is electrically connected to the groove-type photosensor, and the other end of the capacitor C10 is grounded.

In one embodiment, the overcurrent protection module further includes a resistor R8, a transistor Q1, a resistor R4, and an ESD diode 2, wherein one end of the resistor R8 is electrically connected to the trench-type photosensor, the other end of the resistor R8 is grounded, one end of the transistor Q1 is electrically connected to the trench-type photosensor, the other end of the transistor Q1 is electrically connected to one end of the resistor R4, the other end of the resistor R4 is electrically connected to one end of the ESD diode 2, and the other end of the ESD diode 2 is grounded.

In one embodiment, the overcurrent protection module further includes a capacitor C1, a capacitor C2, a capacitor C3, and a terminal CNNT1, wherein one end of the capacitor C1 is electrically connected to the terminal CNNT1, the other end of the capacitor C1 is grounded, one end of the capacitor C2 is electrically connected to the terminal CNNT1, the other end of the capacitor C2 is grounded, one end of the capacitor C3 is electrically connected to the terminal CNNT1, and the other end of the capacitor C3 is grounded.

In one embodiment, the connector further comprises a port M1, and the port M1 is electrically connected with the terminal CNNT 1.

In one embodiment, the overcurrent protection module further includes a resistor R10, a resistor R12, a capacitor C8, an ESD diode 6, and a port SW2, wherein one end of the resistor R10 is electrically connected to the terminal CNNT1, the other end of the resistor R10 is electrically connected to one ends of the resistor R12 and the capacitor C8, respectively, the other end of the capacitor C8 is electrically connected to one end of the ESD diode 6, and the other end of the ESD diode 6 is electrically connected to the port SW 2.

In one embodiment, the overcurrent protection module further includes a resistor R9, a capacitor C7, an ESD diode 5, and a port SW1, wherein one end of the resistor R9 is electrically connected to the terminal CNNT1, the other end of the resistor R9 is electrically connected to one end of the capacitor C7, one end of the capacitor C7 is further electrically connected to one end of the ESD diode 5, the other end of the capacitor C7 is grounded, and the other end of the ESD diode 5 is electrically connected to the port SW 1.

In one embodiment, the overcurrent protection module further includes a resistor R5, a capacitor C5, an ESD diode 3, and a resistor R24, wherein the resistor R5 is electrically connected to one end of the capacitor C5, the other end of the capacitor C5 is grounded, one end of the ESD diode 3 is electrically connected to the resistor R5, the other end of the ESD diode 3 is electrically connected to one end of the resistor R24, and the other end of the resistor R24 is electrically connected to the first microswitch.

In one embodiment, the overcurrent protection module further includes a capacitor C6, an ESD diode 4, and a resistor R26, one end of the capacitor C6 is electrically connected to one end of the ESD diode 4, the other end of the capacitor C6 is grounded, one end of the ESD diode 4 is further electrically connected to one end of the resistor R26, the other end of the ESD diode 4 is grounded, and the other end of the resistor R26 is electrically connected to the second microswitch.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

the utility model is a sensor circuit applied to intelligent door lock, through setting up the first microswitch and second microswitch, the quick-acting mechanism of the microswitch can switch over the contact instantly, therefore the arc duration is short, the microswitch can switch over the contact at the identity position basically even open or close the operation repeatedly, and then has protected the contact; by arranging the overcurrent protection module, when the circuit normally works, the overcurrent protection module is in a cut-off state, the normal work of a circuit is not influenced, when the circuit has abnormal overvoltage and reaches the breakdown voltage of the circuit, the circuit is rapidly changed from a high-resistance state to a low-resistance state, a low-impedance conduction path is provided for instant current, and meanwhile, the abnormal high voltage is controlled within a safe level, so that the circuit is protected; when the abnormal overvoltage disappears, the circuit is restored to a high-resistance state, and the circuit works normally. Therefore, the coil can be effectively prevented from being burnt due to artificial damage of the circuit and overlarge current flowing through the electromagnetic coil caused by some reasons of the electromagnetic actuator.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a functional block diagram of a sensor circuit for use in an intelligent door lock in accordance with one embodiment of the present invention;

fig. 2 is a circuit diagram of a sensor circuit applied to an intelligent door lock according to an embodiment of the present invention.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, in an embodiment, a sensor circuit applied to an intelligent door lock includes an overcurrent protection module, a slot type photoelectric sensor and a switch module, where the overcurrent protection module is used to protect a circuit, the slot type photoelectric sensor is used to output a signal, and the switch module is used to switch a contact.

Referring to fig. 1 and 2, the groove-type photoelectric sensor is electrically connected to the overcurrent protection module; the switch module comprises a first microswitch and a second microswitch, and the first microswitch and the second microswitch are respectively and electrically connected with the overcurrent protection module. It should be noted that, by arranging the first microswitch and the second microswitch, the quick-acting mechanism of the microswitch can instantaneously switch the contact, so that the arc duration is short, and the microswitch can basically switch the contact at the same position even if the microswitch is repeatedly opened or closed, thereby protecting the contact; by arranging the overcurrent protection module, when the circuit normally works, the overcurrent protection module is in a cut-off state, the normal work of a circuit is not influenced, when the circuit has abnormal overvoltage and reaches the breakdown voltage of the circuit, the circuit is rapidly changed from a high-resistance state to a low-resistance state, a low-impedance conduction path is provided for instant current, and meanwhile, the abnormal high voltage is controlled within a safe level, so that the circuit is protected; when the abnormal overvoltage disappears, the circuit is restored to a high-resistance state, and the circuit works normally. Therefore, the coil can be effectively prevented from being burnt due to artificial damage of the circuit and overlarge current flowing through the electromagnetic coil caused by some reasons of the electromagnetic actuator. Furthermore, the photoelectric detection method of the groove-type photoelectric sensor has the advantages of high precision, quick response, non-contact and the like. But also has many measurable parameters, simple structure of the sensor and flexible and various forms. The groove-type photoelectric sensor is formed by mounting a light emitter and a receiver on both sides of a groove in a face-to-face manner. The light emitter can emit infrared light, and the light receiver can receive light under the unobstructed condition. However, when the object to be detected passes through the slot, light is blocked, the photoelectric switch starts to work, a switch control signal is output, and the load current is cut off or switched on, so that one control action is completed. This is used to intelligent lock module, can effectually provide the security that the user used, and the cell type photoelectric sensor cost.

Referring to fig. 2, preferably, the overcurrent protection module includes a capacitor C11, a capacitor C4, and a capacitor C10, one end of the capacitor C11 is electrically connected to the trench-type photosensor, the other end of the capacitor C11 is grounded, one end of the capacitor C4 is electrically connected to the trench-type photosensor, the other end of the capacitor C4 is grounded, one end of the capacitor C10 is electrically connected to the trench-type photosensor, and the other end of the capacitor C10 is grounded. The capacitor C11, the capacitor C4, and the capacitor C10 all function as a filter.

Referring to fig. 2, more preferably, the over-current protection module further includes a resistor R8, a transistor Q1, a resistor R4, and an ESD diode 2, wherein one end of the resistor R8 is electrically connected to the trench-type photosensor, the other end of the resistor R8 is grounded, one end of the transistor Q1 is electrically connected to the trench-type photosensor, the other end of the transistor Q1 is electrically connected to one end of the resistor R4, the other end of the resistor R4 is electrically connected to one end of the ESD diode 2, and the other end of the ESD diode 2 is grounded. It should be noted that the resistor R4 plays a role in overcurrent protection, the transistor Q1 plays a role in pull-up, the pull-up potential is limited at the same time, and the resistor R8 is a pull-down resistor, so that excessive current and large power consumption are prevented. The ESD diode 2 is used to protect the circuit.

Referring to fig. 2, in an embodiment, the overcurrent protection module further includes a capacitor C1, a capacitor C2, a capacitor C3, and a terminal CNNT1, wherein one end of the capacitor C1 is electrically connected to the terminal CNNT1, the other end of the capacitor C1 is grounded, one end of the capacitor C2 is electrically connected to the terminal CNNT1, the other end of the capacitor C2 is grounded, one end of the capacitor C3 is electrically connected to the terminal CNNT1, and the other end of the capacitor C3 is grounded. It should be noted that the capacitor C1, the capacitor C2 and the capacitor C3 all play a role of filtering,

referring to fig. 2, in an embodiment, the sensor circuit applied to the intelligent door lock further includes a port M1, and the port M1 is electrically connected to the terminal CNNT 1. The port M1 is a port to which a door lock host is connected.

Referring to fig. 2, in an embodiment, the over-current protection module further includes a resistor R10, a resistor R12, a capacitor C8, an ESD diode 6, and a port SW2, wherein one end of the resistor R10 is electrically connected to the terminal CNNT1, the other end of the resistor R10 is electrically connected to one ends of the resistor R12 and the capacitor C8, the other end of the capacitor C8 is electrically connected to one end of the ESD diode 6, and the other end of the ESD diode 6 is electrically connected to the port SW 2. It should be noted that the resistor R10 plays a role of overcurrent protection, the resistor R12 is a pull-up resistor, the capacitor C8 plays a role of filtering, the ESD diode 6 plays a role of a protection circuit, and the port SW2 is used for connecting a door lock latch bolt.

Referring to fig. 2, in an embodiment, the over-current protection module further includes a resistor R9, a capacitor C7, an ESD diode 5, and a port SW1, wherein one end of the resistor R9 is electrically connected to the terminal CNNT1, the other end of the resistor R9 is electrically connected to one end of the capacitor C7, one end of the capacitor C7 is further electrically connected to one end of the ESD diode 5, the other end of the capacitor C7 is grounded, and the other end of the ESD diode 5 is electrically connected to the port SW 1. It should be noted that the resistor R9 is used for overcurrent protection, the capacitor C7 is a filter capacitor, the ESD diode 5 plays a role of electrostatic protection, and the port SW1 is used as a port of the door lock trigger tongue.

Referring to fig. 2, specifically, the over-current protection module further includes a resistor R5, a capacitor C5, an ESD diode 3, and a resistor R24, wherein the resistor R5 is electrically connected to one end of the capacitor C5, the other end of the capacitor C5 is grounded, one end of the ESD diode 3 is electrically connected to the resistor R5, the other end of the ESD diode 3 is electrically connected to one end of the resistor R24, and the other end of the resistor R24 is electrically connected to the first micro switch. The resistor R5 and the resistor R24 are used for overcurrent protection, the capacitor C5 is a filter capacitor, and the ESD diode 3 is used for a protection circuit.

Referring to fig. 2, specifically, the overcurrent protection module further includes a capacitor C6, an ESD diode 4, and a resistor R26, wherein one end of the capacitor C6 is electrically connected to one end of the ESD diode 4, the other end of the capacitor C6 is grounded, one end of the ESD diode 4 is further electrically connected to one end of the resistor R26, the other end of the ESD diode 4 is grounded, and the other end of the resistor R26 is electrically connected to the second micro switch. It should be noted that the capacitor C6 plays a role of filtering, the resistor R26 plays a role of overcurrent protection, and the ESD diode 4 plays a role of a protection circuit.

It should be further noted that, after the input end is connected to the slot type photoelectric sensor, a line is led out from the terminal CNNT1, and the power supply input is +5V to supply power to the entire adapter board. As shown in fig. 2, ESD diode protection adapter board circuits are respectively designed and placed in the circuit, when the power supply voltage is greater than 7v, the ESD diode functions to stabilize the voltage at 5v, and 1pin and 7pin are respectively connected with the latch bolt and the touch bolt of the control door lock; 2pin is connected with a photoelectric coupler of the adapter plate, when an object blocks the groove-shaped groove, the line voltage is cut off, and the voltage output is 0; the micro switches of the motor modules M1 of the door lock, which are respectively connected with the 3pin and the 4pin, and the micro switches of the adapter plates, which are respectively connected with the 5pin and the 6pin, are S1/S2, and the 9pin is matched with the touch tongue module for controlling the door lock.

The above embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A sensor circuit for use with an intelligent door lock, comprising:

an overcurrent protection module;

2. The sensor circuit applied to the intelligent door lock of claim 1, wherein the over-current protection module comprises a capacitor C11, a capacitor C4 and a capacitor C10, one end of the capacitor C11 is electrically connected with the groove-shaped photoelectric sensor, the other end of the capacitor C11 is grounded, one end of the capacitor C4 is electrically connected with the groove-shaped photoelectric sensor, the other end of the capacitor C4 is grounded, one end of the capacitor C10 is electrically connected with the groove-shaped photoelectric sensor, and the other end of the capacitor C10 is grounded.

3. The sensor circuit applied to the intelligent door lock of claim 1, wherein the over-current protection module further comprises a resistor R8, a transistor Q1, a resistor R4 and an ESD diode 2, one end of the resistor R8 is electrically connected to the groove-shaped photosensor, the other end of the resistor R8 is grounded, one end of the transistor Q1 is electrically connected to the groove-shaped photosensor, the other end of the transistor Q1 is electrically connected to one end of the resistor R4, the other end of the resistor R4 is electrically connected to one end of the ESD diode 2, and the other end of the ESD diode 2 is grounded.

4. The sensor circuit applied to the intelligent door lock of claim 1, wherein the over-current protection module further comprises a capacitor C1, a capacitor C2, a capacitor C3 and a terminal CNNT1, one end of the capacitor C1 is electrically connected to the terminal CNNT1, the other end of the capacitor C1 is grounded, one end of the capacitor C2 is electrically connected to the terminal CNNT1, the other end of the capacitor C2 is grounded, one end of the capacitor C3 is electrically connected to the terminal CNNT1, and the other end of the capacitor C3 is grounded.

5. The sensor circuit applied to the intelligent door lock as claimed in claim 4, further comprising a port M1, wherein the port M1 is electrically connected with the terminal CNNT 1.

6. The sensor circuit applied to the intelligent door lock of claim 4, wherein the over-current protection module further comprises a resistor R10, a resistor R12, a capacitor C8, an ESD diode 6 and a port SW2, one end of the resistor R10 is electrically connected to the terminal CNNT1, the other end of the resistor R10 is electrically connected to one ends of the resistor R12 and the capacitor C8, respectively, the other end of the capacitor C8 is electrically connected to one end of the ESD diode 6, and the other end of the ESD diode 6 is electrically connected to the port SW 2.

7. The sensor circuit applied to the intelligent door lock of claim 6, wherein the over-current protection module further comprises a resistor R9, a capacitor C7, an ESD diode 5 and a port SW1, one end of the resistor R9 is electrically connected to the terminal CNNT1, the other end of the resistor R9 is electrically connected to one end of the capacitor C7, one end of the capacitor C7 is further electrically connected to one end of the ESD diode 5, the other end of the capacitor C7 is grounded, and the other end of the ESD diode 5 is electrically connected to the port SW 1.

8. The sensor circuit applied to the intelligent door lock of claim 1, wherein the over-current protection module further comprises a resistor R5, a capacitor C5, an ESD diode 3 and a resistor R24, the resistor R5 is electrically connected to one end of the capacitor C5, the other end of the capacitor C5 is grounded, one end of the ESD diode 3 is electrically connected to the resistor R5, the other end of the ESD diode 3 is electrically connected to one end of the resistor R24, and the other end of the resistor R24 is electrically connected to the first microswitch.

9. The sensor circuit applied to the intelligent door lock of claim 1, wherein the over-current protection module further comprises a capacitor C6, an ESD diode 4 and a resistor R26, one end of the capacitor C6 is electrically connected to one end of the ESD diode 4, the other end of the capacitor C6 is grounded, one end of the ESD diode 4 is further electrically connected to one end of the resistor R26, the other end of the ESD diode 4 is grounded, and the other end of the resistor R26 is electrically connected to the second micro switch.