CN212751826U

CN212751826U - Reliable charging device

Info

Publication number: CN212751826U
Application number: CN202021294599.1U
Authority: CN
Inventors: 吴化洪; 王金兴; 李松寒; 谢小渭; 魏略
Original assignee: Changyuan Contron Power Security Technology Co Ltd
Current assignee: Changyuan Contron Power Security Technology Co Ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-03-19
Anticipated expiration: 2030-07-03

Abstract

The utility model discloses a reliable charging device, realize once detection on throne to the computer key through setting up distance sensing circuit, realize the secondary detection on throne to the computer key through tongue tube sensing circuit, master control circuit is according to tongue tube sensing circuit and distance sensing circuit's dual sensing signal, whether synthesize and judge the computer key and put into the key standing groove, realize the dibit detection on throne, reach the purpose of correctly placing the computer key in confirming charging device, provide the reference for further charge control, avoid leaking the emergence of the situation of charging.

Description

Reliable charging device

Technical Field

The utility model relates to a charging device technical field, concretely relates to carry out the charging device who charges to electronic product through the charging seat mode.

Background

In the field of electric power error prevention, a computer key is a common device, generally, the computer key needs to be adapted to an adapter for charging through the adapter, in order to ensure that the computer key is well matched with the adapter, a computer key seat is arranged on the adapter, the computer key is placed on the key seat for charging, in order to confirm that the computer key is on the key seat, whether the computer key is on position needs to be detected, and in the existing charging technology, a hall sensor and the like are often adopted for detecting whether the key is on position. However, currently, the computer key is charged in an elastic contact mode through the ejector pin arranged at the bottom of the key seat and the charging electrode at the bottom of the computer key, the detection range of the hall sensor is large, the key is often detected by the hall sensor, but the ejector pin arranged at the bottom of the key seat and the charging electrode at the bottom of the computer key are not reliably contacted, so that the computer key is not actually charged, and the normal use of the computer key is influenced. More serious, the long-term power shortage of the battery leads to the reduction of the service life of the battery, and even the battery bulges and liquid leakage sometimes happen.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a charging device can charge similar products such as computer key more reliably. The utility model discloses realize by following technical scheme:

a reliable charging device comprises a charging seat body and a computer key; the charging seat body comprises a shell and an electronic circuit, the shell is provided with a key placing groove which can support and partially accommodate a computer key, a contact type charging terminal is arranged in the key placing groove, and a contact type power receiving terminal is arranged on a shell of the computer key; the electronic circuit comprises a main control circuit and a charging circuit; the computer key is characterized in that a magnetic device is arranged on a shell of the computer key, and the electronic circuit further comprises a reed switch sensing circuit used for sensing the magnetic device; the electronic circuit further comprises a distance sensing circuit for detecting the distance between the computer key and the key placing groove, and the reed switch sensing circuit and the distance sensing circuit are respectively and electrically connected with the main control circuit.

As a specific technical scheme, the key placing groove is a groove for supporting and accommodating the back of a computer key, and the back of the computer key is supported and accommodated in the key placing groove.

As a specific technical scheme, the magnetic device is arranged on the back of the computer key, and the reed pipe KR of the reed pipe sensing circuit is arranged in the key placing groove.

As a specific technical scheme, the electronic circuit further comprises a signal transmission circuit, and contact signal transmission terminals are correspondingly arranged in the key placing groove and on the shell of the computer key.

As a specific technical solution, the distance sensing circuit is implemented by an infrared sensing chip, and a light emitting portion and a light receiving portion of the infrared sensing chip are disposed in the key placing groove.

As a specific technical scheme, the infrared sensing chip is an LTR series chip, and an SDA port, an SCK port and an INT port of the infrared sensing chip are respectively in communication connection with the main control circuit.

As a specific technical solution, the electronic circuit further includes a current detection circuit, which is implemented by a current detection amplifier chip MAX4173, and performs current detection on a resistor R2 connected in series in the charging loop, converts the detected current signal into an amplified voltage signal Vout, and inputs the amplified voltage signal Vout to the main control circuit.

As a specific technical scheme, the electronic circuit further comprises a charging indication circuit and an abnormal alarm circuit which are respectively connected with an indication signal output end and an alarm signal output end of the main control circuit.

The beneficial effects of the utility model reside in that: realize once detecting on the throne to the computer key through setting up apart from sensing circuit, realize the secondary detection on the throne to the computer key through tongue tube sensing circuit, master control circuit is according to tongue tube sensing circuit and distance sensing circuit's dual sensing signal, whether comprehensive judgement computer key is put into the key standing groove, realize dibit detection on the throne, reach the purpose of confirming correctly placing the computer key in the charging device, provide the reference for further charging control, for example only detect and place the computer key, charging circuit just supplies power to the charging terminal. In addition, after the set current detection circuit is started, whether current is formed in a charging loop where the charging terminal is located is detected, if so, the charging is normal, and the charging indication module indicates normal charging; otherwise, the sound-light alarm prompts the charging abnormity.

Drawings

Fig. 1 is a view of the charging base according to the embodiment of the present invention.

Fig. 2 is a view of a computer key according to an embodiment of the present invention.

Fig. 3 is a block diagram of an electronic circuit according to an embodiment of the present invention.

Fig. 4 is a schematic circuit diagram of a reed switch sensing circuit according to an embodiment of the present invention.

Fig. 5 is a schematic circuit diagram of a distance sensing circuit according to an embodiment of the present invention.

Fig. 6 is a schematic circuit diagram of a distance sensing circuit according to an embodiment of the present invention.

Detailed Description

The following description will further describe a specific embodiment of the present invention with reference to the accompanying drawings, and for convenience of description, the definitions of the upper, lower, left, right and other orientations in the present application are only for convenience of clearly describing the structure of the checking fixture, and are not used to limit the actual orientation of the checking fixture during the production, use, sale and the like. The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

referring to fig. 1 and 2, the charging device of the present embodiment includes a charging base 10 and a computer key 20. The charging base 10 includes a housing 11 and a functional electronic circuit (described in detail below), the housing 11 has a key slot 111 (two key slots are shown in the product of fig. 1) for supporting and partially accommodating the computer key 20; specifically, the back of the computer key 20 is supported and received in the key receiving groove 111.

In the present embodiment, a main portion of the electronic circuit is carried on one or more circuit boards in the housing 11, and a few devices (e.g., interfaces, terminals, sensing devices, and indicating devices) are specifically disposed on the housing 11. As shown in fig. 3, the electronic circuit includes a power supply circuit, a main control circuit, a charging circuit, a signal transmission circuit, a reed switch sensing circuit, a distance sensing circuit, a current detection circuit, an abnormality alarm circuit, and a charging indication circuit. The power circuit, the main control circuit, the charging circuit and the signal transmission circuit all belong to conventional circuits of the charging adapter, and are not described herein again.

The key placing groove 111 is internally provided with a contact type charging terminal 12, a contact type power receiving terminal (not shown in the figure, and referring to the prior art) is correspondingly arranged on the shell of the computer key 20, when the computer key 20 is correctly placed in the key placing groove 111, the charging terminal 12 and the power receiving terminal are correspondingly contacted and matched, and then a charging circuit is used for charging operation. It can be understood that contact signal transmission terminals can be correspondingly disposed in the key placing groove 111 and on the housing of the computer key 20 for signal transmission between the charging seat 10 and the computer key 20.

Because the key placing groove 111 does not have a forced limiting structure for the computer key 20, in the prior art, the situation that the computer key 20 is not correctly placed in the key placing groove 111 exists, and the situation that the charging terminal 12 and the power receiving terminal cannot be effectively contacted and matched due to incorrect placement can cause a manager to misunderstand that the computer key is charged but is not actually charged. In order to solve this problem, it is determined whether the computer key 20 has been correctly placed in the key placement groove 111, and the following technical solutions are adopted in the present embodiment:

a magnetic device 25, such as a magnet, is embedded in the housing of the computer key 20; the electronic circuit of the charging base 10 further includes a reed switch sensing circuit for sensing the magnetic device 25 and inputting the sensing signal OUT to the main control circuit for analysis, as shown in fig. 1 and 4. Specifically, the magnetic device 25 is disposed on the back of the computer key 20, the tongue tube KR of the tongue tube sensing circuit is disposed in the key placing groove 111, and when the computer key 20 is correctly placed in the key placing groove 111, the tongue tube KR just senses the magnetic field of the magnetic device 25. The master control circuit judges whether the computer key 20 is placed in the key placing groove 111 according to whether the reed switch sensing circuit senses a signal.

Referring to fig. 5, the electronic circuit of the charging base 10 further includes a distance sensing circuit, which is mainly implemented by an infrared sensing chip, and as shown in fig. 1, a sensing portion 16 (i.e., a light emitting portion and a light receiving portion) of the infrared sensing chip is disposed in the key placement groove 111. In this embodiment, the infrared sensing chip 16 is implemented by LTR series chip, and more specifically, may be LTR-553 chip or LTR-558 chip. The SDA port and the SCK port of the infrared sensing chip are in communication connection with the main control circuit, and the INT port is used for outputting a shielding sensing signal to the main control circuit. The specific working principle is as follows: the infrared sensing chip emits light pulses with certain frequency, whether the light pulses with the frequency are reflected back is detected, and if the light pulses with the frequency are reflected, the fact that shielding occurs is judged. In addition, the detection distance of the infrared sensing chip can be adjusted as required through the main control circuit. In this embodiment, when the computer key 20 is correctly placed in the key placement groove 111, it is determined that shielding occurs, and the INT port of the infrared sensing chip outputs a shielding sensing signal to the main control circuit.

In this embodiment, the main control circuit comprehensively determines whether the computer key 20 is placed in the key placing groove 111 according to the dual sensing signals of the reed pipe sensing circuit and the distance sensing circuit, that is, when both the reed pipe sensing circuit and the distance sensing circuit detect that the computer key 20 is placed in the key placing groove 111, the main control circuit finally determines that the computer key 20 is correctly placed in the key placing groove 111. In this case, the main control circuit controls the charging circuit to charge the computer key 20.

Referring to fig. 6, the electronic circuit of the charging base 10 further includes a current detection circuit, the current detection circuit is mainly implemented by a current detection amplifier chip MAX4173, the current detection circuit detects a current through a resistor R2 connected in series in the charging loop, converts a detected current signal into an amplified voltage signal Vout, and provides the amplified voltage signal Vout to the main control circuit, and the main control circuit determines whether the charging loop has a normal charging current by determining an amplitude of the voltage signal Vout.

In addition, the electronic circuit of the charging base 10 further includes a charging indication circuit and an abnormal alarm circuit, which are respectively connected to the indication signal output terminal and the alarm signal output terminal of the main control circuit. In a charging state, when the main control circuit judges that the charging circuit has normal charging current, an indication signal is output to the charging indication circuit for indication, for example, an indication lamp is used for displaying; when the main control circuit judges that the charging circuit does not have normal charging current, an alarm signal is output to the abnormal alarm circuit, and the abnormal alarm circuit alarms in an acoustic or optical mode.

The above embodiments are merely for full disclosure and are not intended to limit the present invention, and all changes that can be made without creative work based on the inventive idea and the equivalent technical features should be considered as the scope of the present disclosure.

Claims

1. A reliable charging device comprises a charging seat body and a computer key; the charging seat body comprises a shell and an electronic circuit, the shell is provided with a key placing groove which can support and partially accommodate a computer key, a contact type charging terminal is arranged in the key placing groove, and a contact type power receiving terminal is arranged on a shell of the computer key; the electronic circuit comprises a main control circuit and a charging circuit; the computer key is characterized in that a magnetic device is arranged on a shell of the computer key, and the electronic circuit further comprises a reed switch sensing circuit used for sensing the magnetic device; the electronic circuit further comprises a distance sensing circuit for detecting the distance between the computer key and the key placing groove, and the reed switch sensing circuit and the distance sensing circuit are respectively and electrically connected with the main control circuit.

2. The charging device of claim 1, wherein the key receiving slot is a slot that supports and receives a back of a computer key, the back of the computer key being supported and received within the key receiving slot.

3. The charging device of claim 2, wherein the magnetic device is disposed on the back of the computer key, and the reed switch KR of the reed switch sensing circuit is disposed in the key accommodating slot.

4. The charging device of claim 1, wherein the electronic circuit further comprises a signal transmission circuit, and contact signal transmission terminals are correspondingly arranged in the key placing groove and on the housing of the computer key.

5. The charging device according to claim 1, wherein the distance sensing circuit is implemented by an infrared sensing chip, and a light emitting portion and a light receiving portion of the infrared sensing chip are disposed in the key placement groove.

6. The charging device of claim 5, wherein the infrared sensing chip is an LTR series chip, and the SDA port, the SCK port and the INT port of the infrared sensing chip are respectively connected to the main control circuit in a communication manner.

7. A charging arrangement as claimed in any one of claims 1 to 6, in which the electronic circuit further comprises a current sensing circuit implemented by a current sense amplifier chip MAX4173 for sensing the current across a resistor R2 connected in series in the charging circuit, converting the sensed current signal to an amplified voltage signal Vout and inputting it to the main control circuit.

8. The charging device of claim 7, wherein the electronic circuit further comprises a charging indication circuit and an abnormal alarm circuit, which are respectively connected to the indication signal output terminal and the alarm signal output terminal of the main control circuit.