Electronic lock

Abstract

The utility model relates to an electronic lock which comprises a driving device, a transmission device, a lock rod and a detection device, the driving device, the transmission device and the lock rod are sequentially connected, and the driving device drives the transmission device to drive the lock rod to do reciprocating motion so that the electronic lock can be in a locked state or an unlocked state; the detection device comprises a PCB, a Hall chip arranged on the PCB and a magnetic part arranged on the lock rod, the magnetic part is located in an electromagnetic induction area of the Hall chip, and the detection device is configured to drive the magnetic part to synchronously get away from or get close to the Hall chip when the lock rod reciprocates. And the Hall chip generates an induction signal through the induced magnetic field intensity change and transmits the induction signal to the PCB. According to the technical scheme, the Hall chip generates the sensing signal through the sensed magnetic field intensity change of the magnetic part and outputs the sensing signal to the PCB, so that the position of the lock rod is judged, and the problems that an electronic lock has no position feedback, the motion state of the lock rod is difficult to accurately know, and the user experience feeling is poor are solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of automobile charging, and in particular to an electronic lock. Background Art

[0002] With the rise of new energy technologies, the electric vehicle industry has developed rapidly. The charging safety and reliability of electric vehicles have been paid attention to by people from all walks of life in the electric vehicle industry. Electronic locks provide a guarantee for the safety of electric vehicle charging.

[0003] The electronic lock is an important device for locking the charging gun and the charging base. It realizes the secondary locking function of the charging system to ensure the safety of the charging system. During the charging process, the lock rod of the electronic lock locks the charging gun on the charging base. However, after multiple uses, the lock rod will wear and break accidentally on the lock hole on the charging base and the end of the electronic lock. This will cause the electronic lock to fail, causing the charging gun to fall off the charging base and cause electric shock. In addition, in the existing electronic lock structure, there is no feedback on the position of the lock rod when it is locked or unlocked, making it difficult to accurately know the movement state of the lock rod, resulting in a high failure rate of the electronic lock and a poor user experience. Utility Model Content

[0004] The disclosed embodiments provide an electronic lock to at least partially solve the problem that the electronic lock has no position feedback, it is difficult to accurately know the movement state of the lock rod, and the user experience is poor.

[0005] The specific technical solutions provided by the embodiments of the present disclosure are as follows:

[0006] The present disclosure provides an electronic lock, comprising a housing, a driving device, a transmission device and a lock rod which are sequentially connected and arranged in the housing, and a detection device for detecting the position of the lock rod, wherein one end of the lock rod extends out of the housing, and the driving device drives the transmission device to drive the lock rod to reciprocate relative to the housing, so that the electronic lock is in a locked state or an unlocked state;

[0007] The detection device includes a PCB board arranged on the shell, a Hall chip arranged on the PCB board and electrically connected to the PCB board, and a magnetic component arranged on the lock rod. The magnetic component is arranged opposite to the Hall chip and is located in the electromagnetic induction area of ​​the Hall chip. The detection device is configured to drive the magnetic component to synchronously move away from or close to the Hall chip when the lock rod reciprocates. The Hall chip generates an induction signal through the change in the sensed magnetic field strength and transmits it to the PCB board.

[0008] Preferably, the drive device has an output shaft, on which a worm is mounted, and the transmission device includes a primary transmission part, a secondary transmission part and a tertiary transmission part which are connected in sequence, the primary transmission part includes a turbine meshed with the worm and a first gear coaxially arranged and linked to the turbine; the secondary transmission part includes a second gear meshed with the first gear and a third gear coaxially arranged and linked to the second gear; the tertiary transmission part includes a fourth gear meshed with the third gear and a fifth gear coaxially arranged and linked to the fourth gear, and the fifth gear is connected and cooperated with the locking rod.

[0009] Preferably, a connector is provided on the shell, and the connector is provided with a plurality of terminals, and some of the terminals are electrically connected to the driving device; a plug-in connector is provided on the PCB board, and the remaining terminals are electrically connected to the PCB board through the plug-in connector.

[0010] Preferably, a groove is formed on the locking rod, the magnetic component is arranged in the groove, and at least a portion of the magnetic component is integrally formed with the locking rod by two-color injection molding.

[0011] Preferably, a rack is provided on a side of the locking rod close to the transmission device, the rack is meshed with the fifth gear, and the fifth gear rotates to drive the locking rod to perform reciprocating motion.

[0012] Preferably, when the magnetic part reciprocates relative to the Hall chip, it has an upper limit position, a lower limit position and an intermediate position between the upper limit position and the lower limit position; when the magnetic part is at the intermediate position, it is arranged relative to the Hall chip, and the Hall chip does not output a voltage signal; when the magnetic part moves to the lower limit position, the locking rod is in a locked state, and the Hall chip outputs a first voltage signal; when the magnetic part moves to the upper limit position, the locking rod is in an unlocked state, and the Hall chip outputs a second voltage signal.

[0013] Preferably, the magnetic member is arranged in a rectangular block shape; there is a gap between the magnetic member and the Hall chip in the sliding direction, and the size of the gap in the horizontal direction is 1 mm to 3 mm.

[0014] Preferably, a guide convex strip is provided in the housing along the extension direction of the locking rod, and a guide groove for sliding cooperation of the guide convex strip is provided on the locking rod.

[0015] Preferably, the tooth surfaces of the worm, the turbine, the first gear, the second gear, the third gear, the fourth gear, the fifth gear and the rack all have wear-resistant coatings.

[0016] Preferably, the electronic lock further comprises an upper cover covering the shell, and the shell and the upper cover are connected by laser welding, ultrasonic welding or screws.

[0017] The beneficial effects of the present disclosure are as follows:

[0018] The driving device drives the transmission device to drive the lock rod to perform reciprocating motion, so that the electronic lock is locked or unlocked; by arranging a detection device in the shell, the Hall chip is electrically connected to the PCB board, and the magnetic part is arranged on the lock rod and placed in the electromagnetic induction area of ​​the Hall chip. The driving device drives the transmission device to drive the lock rod to perform reciprocating motion, and the lock rod drives the magnetic part to move synchronously with the Hall chip. Based on the Hall effect, the Hall chip generates an induction signal by sensing the change in the magnetic field strength of the magnetic part and outputs it to the PCB board, so as to judge the position of the lock rod, thereby solving the problem that the electronic lock has no position feedback, it is difficult to accurately know the movement state of the lock rod, and the user experience is poor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 This is a schematic diagram of the overall structure of the electronic lock in the embodiment of the present disclosure;

[0021] Figure 2 To highlight Figure 1 A schematic diagram of the structure of the driving device, transmission device, locking rod and detection device;

[0022] Figure 3 To highlight Figure 2 A schematic diagram of the structure of the detection device and the locking rod in another direction;

[0023] Figure 4 A schematic diagram to highlight the structure of the connector on the housing;

[0024] Figure 5 It is a structural schematic diagram of a magnetic part being located in the middle position when performing reciprocating motion relative to the Hall chip;

[0025] Figure 6 It is a structural schematic diagram of the magnetic part being located at the lower limit position when performing reciprocating motion relative to the Hall chip;

[0026] Figure 7 It is a structural schematic diagram of the magnetic part being located at the upper limit position when performing reciprocating motion relative to the Hall chip.

[0027] Reference numerals:

[0028] 1. Shell; 101. Connector; 102. Guide ridge; 2. Upper cover; 3. Driving device; 301. Output shaft; 302. Worm; 4. Transmission device; 401. Turbine; 402. First gear; 403. Second gear; 404. Third gear; 405. Fourth gear; 406. Fifth gear; 5. Lock rod; 501. Groove; 502. Rack; 503. Guide groove; 6. Detection device; 601. PCB board; 602. Hall chip; 603. Magnetic part; 604. Connector; 7. Upper limit position; 8. Lower limit position; 9. Middle position. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present disclosure are described below in conjunction with the drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure. In addition, the embodiments and features in the embodiments of the present disclosure may be combined with each other if no conflict occurs.

[0030] This embodiment provides an electronic lock such as Figures 1 to 7 As shown, it includes a housing 1 and a driving device 3, a transmission device 4 and a locking rod 5 which are sequentially connected and arranged in the housing 1, and a detection device 6 for detecting the position of the locking rod 5. One end of the locking rod 5 extends out of the housing 1. The driving device 3 drives the transmission device 4 to drive the locking rod 5 to reciprocate relative to the housing 1, so that the electronic lock is in a locked state or an unlocked state. The detection device 6 includes a PCB board 601 arranged on the housing 1, a Hall chip 602 arranged on the PCB board 601 and electrically connected to the PCB board 601, and a magnetic member 603 arranged on the locking rod 5. The magnetic member 603 is arranged opposite to the Hall chip 602 and is located in the electromagnetic induction area of ​​the Hall chip 602. The detection device 6 is configured to drive the magnetic member 603 to synchronously move away from or close to the Hall chip 602 when the locking rod 5 reciprocates. The Hall chip 602 generates an induction signal through the change in the magnetic field strength sensed and transmits it to the PCB board 601.

[0031] In this embodiment, the housing 1 has a hollow accommodating chamber, and the driving device 3, the transmission device 4, the locking rod 5 and the detection device 6 are all installed in the accommodating chamber. The housing 1 can provide a protective shell for the above-mentioned devices to prevent the above-mentioned devices from being damaged by external substances (such as water, dust, etc.). The driving device 3, the transmission device 4 and the locking rod 5 are connected in sequence, so that the driving device 3 can drive the locking rod 5 to reciprocate when driving the transmission device 4. The PCB board 601 is detachably arranged on the inner side wall of the housing 1 and is located on one side of the locking rod 5; the Hall chip 602 is arranged on the PCB board 601 and is electrically connected thereto, and the magnetic part 603 is arranged on the side wall of the locking rod 5 near the top, and the magnetic part 603 is arranged opposite to the Hall chip 602. It should be noted that in this embodiment, the driving device 3 can be a motor, and in other embodiments, it can also be a hydraulic motor, which is not limited here. The magnetic member 603 may be a magnet, which has a magnetic field. According to the principle of the Hall effect, the Hall chip 602 can sense the strength of the magnetic field and can feed back the sensed voltage signal to the PCB board 601, thereby determining the movement state of the locking rod 5. At the same time, the position of the locking rod 5 is sensed by the cooperation of the Hall chip 602 and the magnetic member 603, and the signal transmission is high in accuracy and continuous.

[0032] Through the above technical scheme, the driving device 3 drives the transmission device 4 to drive the lock rod 5 to perform reciprocating motion, so that the electronic lock is locked or unlocked; by arranging the detection device 6 in the shell 1, the Hall chip 602 is electrically connected to the PCB board 601, and the magnetic part 603 is arranged on the lock rod 5 and placed in the electromagnetic induction area of ​​the Hall chip 602. The driving device 3 drives the transmission device 4 to drive the lock rod 5 to perform reciprocating motion, and the lock rod 5 drives the magnetic part 603 to move synchronously with the Hall chip 602. Based on the Hall effect, the Hall chip 602 generates an induction signal through the change in the magnetic field strength of the magnetic part 603 sensed and outputs it to the PCB board 601, so as to judge the position of the lock rod 5, thereby solving the problem that the electronic lock has no position feedback, it is difficult to accurately know the movement state of the lock rod 5, and the user experience is poor.

[0033] In some embodiments, reference Figure 2 and Figure 3 The driving device 3 has an output shaft 301, on which a worm 302 is mounted. The transmission device 4 includes a primary transmission part, a secondary transmission part, and a tertiary transmission part connected in sequence. The primary transmission part includes a turbine 401 meshing with the worm 302 and a first gear 402 coaxially arranged and linked with the turbine 401; the secondary transmission part includes a second gear 403 meshing with the first gear 402 and a third gear 404 coaxially arranged and linked with the second gear 403; the tertiary transmission part includes a fourth gear 405 meshing with the third gear 404 and a fifth gear 406 coaxially arranged and linked with the fourth gear 405, and the fifth gear 406 is connected and matched with the locking rod 5.

[0034] Furthermore, a rack 502 is provided on one side of the locking rod 5 close to the transmission device 4 , and the rack 502 is meshed with the fifth gear 406 , and the fifth gear 406 rotates to drive the locking rod 5 to reciprocate.

[0035] In this embodiment, the output shaft 301 is arranged horizontally, and the reciprocating direction of the locking rod 5 is perpendicular to the axial direction of the output shaft 301. When the driving device 3 is working, the output shaft 301 rotates, the worm 302 rotates synchronously, and the turbine 401 meshed with the worm 302 also rotates. The first gear 402 is coaxially arranged with the turbine 401, so the first gear 402 also rotates under the drive of the turbine 401. Similarly, the second gear 403 is meshed with the first gear 402, and the third gear 404 is coaxially arranged with the second gear 403, so under the drive of the first gear 402, the second gear 403 and the third gear 404 also rotate. The fourth gear 405 is meshed with the third gear 404, and the fifth gear 406 is coaxially arranged with the fourth gear 405, so under the drive of the third gear 404, the fourth gear 405 and the fifth gear 406 also rotate. The fifth gear 406 meshes with the rack 502 on the locking rod 5, thereby driving the locking rod 5 to reciprocate. By setting up the primary transmission part, the secondary transmission part and the tertiary transmission part, the output direction of the driving device 3 is changed, and the horizontal rotation of the driving device 3 is converted into a linear motion in the vertical direction, and the effect of multi-stage deceleration is achieved, simplifying the transmission mechanism of the electronic lock. Moreover, by setting up the transmission device 4, the transmission ratio can be effectively improved without increasing the volume, and its thrust can be increased.

[0036] It should be noted that the secondary transmission part and the tertiary transmission part can be double gears, which are smaller in size, can reduce space, reduce the overall volume of the electronic lock, and facilitate centralized control. At the same time, the double gears are durable, stable in structure, and have a long service life. They can maintain a high transmission rate in a high-strength, high-torque environment.

[0037] Furthermore, the fifth gear 406 is a helical gear. Compared with spur gears, helical gears have better meshing performance. Their tooth surfaces are not directly in contact, but in contact at an oblique angle, which can reduce friction resistance and noise to a certain extent. At the same time, the overlap of helical gears is large, which means that the gears can better transmit power when meshing, with high transmission efficiency, and can also reduce the load on each pair of gears and improve the carrying capacity. Moreover, helical gears can make its structure more compact, save the internal space of the electronic lock, and reduce the overall weight of the electronic lock.

[0038] In some embodiments, reference Figure 1 , Figure 2 and Figure 4The housing 1 is provided with a connector 101, which is provided with a plurality of terminals, some of which are electrically connected to the drive device 3; the PCB board 601 is provided with a plug connector, and the remaining terminals are electrically connected to the PCB board 601 through the plug connector. By connecting the connector 101 to an external power source, the drive device 3 and the PCB board 601 can be powered at the same time, which is convenient for circuit control, and can also save space and cost, and improve economic benefits.

[0039] In some embodiments, reference Figure 2 and Figure 3 A groove 501 is provided on the lock rod 5, and the magnetic member 603 is arranged in the groove 501, and at least part of the magnetic member 603 is formed integrally with the lock rod 5 by two-color injection molding. The provision of the groove 501 can prevent the magnetic member 603 from protruding from the lock rod 5, causing interference with the Hall element or other components during the sliding process, thereby affecting the use. The use of the two-color injection molding process can save space and reduce the number of components; at the same time, the magnetic member 603 is connected to the lock rod 5 as a whole, which has a more coordinated appearance and stronger compressive strength. It can also prevent the magnetic member 603 from falling off due to vibration or bump during actual use, thereby affecting the use of the electronic lock, and further improve the reliability of the device.

[0040] In some embodiments, reference Figure 2 , Figure 5 , Figure 6 as well as Figure 7, when the magnetic member 603 reciprocates relative to the Hall chip 602, it can have an upper limit position 7, a lower limit position 8, and an intermediate position 9 between the upper limit position 7 and the lower limit position 8. When the magnetic member 603 is at the intermediate position 9, it is arranged relative to the Hall chip 602, and the Hall chip 602 does not output a voltage signal; when the magnetic member 603 moves to the lower limit position 8, the lock rod 5 is in a locked state, and the Hall chip 602 outputs a first voltage signal; when the magnetic member 603 moves to the upper limit position 7, the lock rod 5 is in an unlocked state, and the Hall chip 602 outputs a second voltage signal. In this embodiment, the magnetic member 603 is in the intermediate position 9 under normal conditions, and its magnetic induction intensity is zero, which can be used as the zero point of displacement, and the Hall chip 602 does not output a voltage signal. When the lock rod 5 drives the magnetic member 603 to move vertically downward to the lower limit position 8 of the Hall element sensing area, the Hall chip 602 outputs a first voltage signal, and the lock rod 5 stops moving downward, and the lock rod 5 is locked at this time. When the lock rod 5 moves vertically upward from the middle position 9 to the upper limit position 7 of the Hall element sensing area, the Hall chip 602 outputs a second voltage signal, and the lock rod 5 stops moving upward. At this time, the lock rod 5 is unlocked. In this way, the state of the lock rod 5 can be judged according to the output voltage signal value, thereby determining the position of the lock rod 5, thereby solving the problem that the electronic lock has no position feedback and it is difficult to accurately know the movement state of the lock rod 5, thereby improving the user experience and the overall reliability of the device.

[0041] In some embodiments, reference Figure 2 and Figure 5 , the magnetic member 603 is arranged in a rectangular block shape, so that the two opposite ends of the magnetic member 603 have a specific magnetic field distribution respectively, and form a strong magnetic field, thereby meeting the magnetic field requirements of the Hall chip 602, and making the detection device 6 more accurate. There is a gap between the magnetic member 603 and the Hall chip 602 in the sliding direction, and the size of the gap in the horizontal direction is 1mm to 3mm. The gap between the magnetic member 603 and the Hall chip 602 can avoid interference between the magnetic member 603 and the Hall chip 602, and collision occurs during the sliding process of the lock rod 5, thereby affecting the use of the device. It should be noted that when the size of the gap is less than 1mm, the magnetic field will interfere with the operation of the Hall chip 602, causing the performance of the Hall chip 602 to deteriorate or even fail; when the gap is greater than 3mm, the sensing accuracy of the Hall chip 602 is reduced, affecting the use. Therefore, in this embodiment, the size of the gap in the horizontal direction can be D=2mm. It is obtained through theoretical derivation and experimental verification that within this distance, there is a magnetic field strength at the end face of the magnetic member 603 facing the Hall element that is approximately a constant magnetic field, and the sensing accuracy of the detection device 6 at this time is the highest.

[0042] In some embodiments, reference Figure 1 and Figure 2A guide ridge 102 is provided in the housing 1 along the extension direction of the lock rod 5, and a guide groove 503 is provided on the lock rod 5 for slidingly matching the guide ridge 102. In this way, the lock rod 5 can move smoothly along the direction of the guide ridge 102, realize stable and reliable reciprocating motion of the device, and improve the reliability of the device. At the same time, the matching structure of the guide ridge 102 and the guide groove 503 is simple, and the assembly efficiency is high.

[0043] In some embodiments, the tooth surfaces of the worm 302, the turbine 401, the first gear 402, the second gear 403, the third gear 404, the fourth gear 405, the fifth gear 406 and the rack 502 are all provided with wear-resistant coatings. The provision of the wear-resistant coating forms an effective protective film on the tooth surface to separate the meshing tooth surfaces, avoids direct contact between the two tooth surfaces, greatly reduces the degree of wear, makes the gear more efficient, and prolongs the service life. At the same time, the provision of the wear-resistant coating can also quickly take away the heat generated by friction, ensuring the normal operation of the gear.

[0044] In some embodiments, Figure 1 As shown, the electronic lock also includes an upper cover 2 covering the shell 1, and the shell 1 and the upper cover 2 are connected by laser welding, ultrasonic welding or screws. The upper cover 2 cooperates with the shell 1 to form a sealed space in the accommodating cavity, which protects all devices in the accommodating cavity and improves the reliability of the device. In this embodiment, the upper cover 2 can be laser welded to the shell 1. Laser welding has a fast welding speed and high precision. During the welding process, the deformation between the shell 1 and the upper cover 2 is small, and the impact on the material is small. In other embodiments, ultrasonic welding or screw connection can also be used for assembly, which is not limited here.

[0045] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present disclosure.

[0046] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present disclosure without departing from the spirit and scope of the embodiments of the present disclosure. Thus, if these modifications and variations of the embodiments of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

1. An electronic lock, comprising a housing, a driving device, a transmission device and a locking rod which are arranged in the housing and connected in sequence, and a detection device for detecting the position of the locking rod, characterized in that: One end of the lock rod extends out of the housing, and the driving device drives the transmission device to drive the lock rod to reciprocate relative to the housing, so that the electronic lock is in a locked state or an unlocked state; The detection device includes a PCB board arranged on the shell, a Hall chip arranged on the PCB board and electrically connected to the PCB board, and a magnetic component arranged on the lock rod. The magnetic component is arranged opposite to the Hall chip and is located in the electromagnetic induction area of ​​the Hall chip. The detection device is configured to drive the magnetic component to synchronously move away from or close to the Hall chip when the lock rod reciprocates. The Hall chip generates an induction signal through the change in the sensed magnetic field strength and transmits it to the PCB board.

2. The electronic lock according to claim 1, characterized in that: The driving device has an output shaft, on which a worm is mounted. The transmission device includes a primary transmission part, a secondary transmission part and a tertiary transmission part which are connected in sequence. The primary transmission part includes a turbine meshed with the worm and a first gear coaxially arranged and linked to the turbine; the secondary transmission part includes a second gear meshed with the first gear and a third gear coaxially arranged and linked to the second gear; the tertiary transmission part includes a fourth gear meshed with the third gear and a fifth gear coaxially arranged and linked to the fourth gear, and the fifth gear is connected and cooperated with the locking rod.

3. The electronic lock according to claim 1, characterized in that: The shell is provided with a connector, and the connector is provided with a plurality of terminals, and some of the terminals are electrically connected to the driving device; the PCB board is provided with a plug connector, and the remaining terminals are electrically connected to the PCB board through the plug connector.

4. The electronic lock according to claim 1, characterized in that: The locking rod is provided with a groove, the magnetic component is arranged in the groove, and at least a part of the magnetic component is integrally formed with the locking rod by two-color injection molding.

5. The electronic lock according to claim 2, characterized in that: A rack is provided on one side of the locking rod close to the transmission device, and the rack is meshed with the fifth gear. The fifth gear rotates to drive the locking rod to perform reciprocating motion.

6. The electronic lock according to claim 1, characterized in that: When the magnetic part reciprocates relative to the Hall chip, it has an upper limit position, a lower limit position and an intermediate position between the upper limit position and the lower limit position; when the magnetic part is at the intermediate position, it is arranged opposite to the Hall chip, and the Hall chip does not output a voltage signal; when the magnetic part moves to the lower limit position, the locking rod is in a locked state, and the Hall chip outputs a first voltage signal; when the magnetic part moves to the upper limit position, the locking rod is in an unlocked state, and the Hall chip outputs a second voltage signal.

7. The electronic lock according to claim 1, characterized in that: The magnetic member is arranged in a rectangular block shape; there is a gap between the magnetic member and the Hall chip in the sliding direction, and the size of the gap in the horizontal direction is 1 mm to 3 mm.

8. The electronic lock according to claim 1, characterized in that: A guide convex strip is arranged in the shell along the extending direction of the locking rod, and a guide groove for slidingly matching the guide convex strip is arranged on the locking rod.

9. The electronic lock according to claim 2, characterized in that: The tooth surfaces of the worm, the turbine, the first gear, the second gear, the third gear, the fourth gear, the fifth gear and the rack are all provided with wear-resistant coatings.

10. The electronic lock according to claim 1, characterized in that: The electronic lock also includes an upper cover covering the shell, and the shell and the upper cover are connected by laser welding, ultrasonic welding or screws.

Images