CN113870467A

CN113870467A - Fingerprint identification device of intelligent cabinet, intelligent cabinet and unlocking method

Info

Publication number: CN113870467A
Application number: CN202111448924.4A
Authority: CN
Inventors: 徐鹏乐; 蔡幸波; 杨旭辉; 苏剑
Original assignee: Zhejiang Dtct Data Technology Co ltd
Current assignee: Zhejiang Dtct Data Technology Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2021-12-31
Anticipated expiration: 2041-12-01
Also published as: CN113870467B

Abstract

The invention provides a fingerprint identification device of an intelligent cabinet, the intelligent cabinet and an unlocking method. The fingerprint identification device includes: the identification screen is provided with a connecting shaft and a plurality of elastic plates fixedly arranged around the connecting shaft, and each elastic plate is provided with a fingerprint identification platform; the supporting base is rotatably connected with the connecting shaft and provided with an adjusting opening; the fingerprint identification assembly is arranged on one side of the support base, which is far away from the identification screen, and corresponds to the adjustment opening; the first shell is covered on one side of the supporting base, which is far away from the fingerprint identification component, and is internally provided with an installation space; the fixing base is arranged on one side, far away from the first shell, of the supporting base, and the adjusting resistor is arranged at the position, corresponding to the adjusting opening, of the fixing base. The invention solves the technical problem that when stains appear on a fingerprint identification screen of fingerprint identification equipment or a large number of fingerprints are remained, correct fingerprints are difficult to accurately and efficiently identify.

Description

Fingerprint identification device of intelligent cabinet, intelligent cabinet and unlocking method

Technical Field

The invention relates to the technical field of fingerprint identification, in particular to a fingerprint identification device of an intelligent cabinet, the intelligent cabinet and an unlocking method.

Background

With the development and progress of society, technologies for protecting property and security documents are developed more and more. And the most important fingerprint identification technology is applied in daily life of people.

However, in the fingerprint identification technology related to the related art, it is difficult to avoid that, in the long-term use process, when stains appear on the fingerprint identification screen, the success rate of fingerprint identification is greatly reduced, and for example, after the fingerprint identification screen is used for many times, a large number of fingerprints remain on the fingerprint identification screen, which also has a great influence on the success rate of fingerprint identification, and further reduces the efficiency of correctly identifying the fingerprints.

Disclosure of Invention

The invention solves the technical problem that when stains appear on a fingerprint identification screen of fingerprint identification equipment or a large number of fingerprints are remained, correct fingerprints are difficult to accurately and efficiently identify.

In order to solve the above problems, the present invention provides a fingerprint identification device for an intelligent cabinet, comprising: the identification screen is provided with a connecting shaft and a plurality of elastic plates fixedly arranged around the connecting shaft, and each elastic plate is provided with a fingerprint identification platform; the elastic plate can deform along the axial direction of the connecting shaft; the supporting base is rotatably connected with the connecting shaft and provided with an adjusting opening; wherein the identification screen is rotated so that each fingerprint identification platform can correspond to the position of the adjustment opening; the fingerprint identification assembly is arranged on one side, far away from the identification screen, of the supporting base and corresponds to the adjusting opening; the fingerprint identification component is used for identifying a fingerprint signal on the corresponding fingerprint identification platform; the first shell is covered on one side of the supporting base, which is far away from the fingerprint identification component, and an installation space is arranged in the first shell; the fingerprint identification platform comprises a first identification platform and a standby identification platform, the first identification platform is arranged outside the installation space, the standby identification platform is arranged in the installation space, and the first identification platform corresponds to the position of the adjusting opening; the fixing seat is arranged on one side, far away from the first shell, of the supporting base, and an adjusting resistor is arranged at the position, corresponding to the adjusting opening, of the fixing seat; if the distance between the identification screen and the adjusting resistor meets the identification condition, the fingerprint identification assembly enters an unlocking state to identify the fingerprint signal; otherwise, the fingerprint identification component is in a standby state.

Compared with the prior art, the technical scheme has the following technical effects: in combination with a specific use scene, for example, stains exist on the first identification platform at the moment, so that when the fingerprint identification assembly is difficult to accurately identify, the identification screen can be rotated to enable the standby identification platform in the installation space to return to the position corresponding to the adjustment opening, namely, the fingerprint identification platform is replaced, so that the function of accurately identifying the fingerprint is improved, on one hand, the problem that the fingerprint cannot be identified for a long time due to residual stains on the fingerprint identification platform is avoided, negative use experience is brought to a user, and meanwhile, the use efficiency is reduced due to the fact that the fingerprint cannot be identified for the first time is avoided; on the other hand, the easy operation of changing the fingerprint identification platform is high-efficient, and needn't utilize other appurtenance alright in order to make the change to the fingerprint identification platform in the short time, in addition, because locate installation space in the reserve identification platform, then avoid exposing it in the air, and make impurity such as a large amount of dusts adhere to on the reserve identification platform to reduce fingerprint identification device's overall efficiency.

In one example of the invention, the support base completely covers the identification screen, the support base being a disc arrangement; the fingerprint identification device comprises: the first meshing teeth are arranged around the supporting base in a surrounding mode, and teeth of the first meshing teeth face to the circle center position of the supporting base; one end of each elastic plate, which is far away from the connecting shaft, is provided with a plurality of second meshing teeth; and the planetary gears are clamped in a motion space formed by the plurality of first meshing teeth and the plurality of second meshing teeth, and are meshed with the first meshing teeth and the second meshing teeth.

Compared with the prior art, the technical scheme has the following technical effects: can be so that adjust discernment screen pivoted in-process, more steady operation, and make first discernment screen can accurately move to corresponding regulation open-ended position, also avoided the discernment screen to take place to skid under drive assembly's drive effect, and lead to first discernment screen can't accurately fall to regulation open-ended position to the effect that follow-up fingerprint identification device is used for unblanking is influenced.

In one example of the present invention, the first engaging teeth, the second engaging teeth, and the planetary gears are provided on the same side of the support base; the tooth height of the first meshing tooth is h₁The tooth height of the second meshing tooth is h₂The tooth height of the planet gear is h₃The root circle radius of the second meshing tooth is r₂A first meshing distance d is formed between the tooth root circle of the first meshing tooth meshed with the planetary gear₁A second meshing distance d is formed between the tooth root circle of the second meshing tooth meshed with the planetary gear₂(ii) a Wherein d is not less than 0₁≤（2/3）h₁，0≤d₂≤（2/3）h₂(ii) a When the fingerprint identification assembly is in a standby state, the distance between the first identification platform and the fixed seat is a first distance d₃When the fingerprint identification component is in an unlocking state, the meshing overlapping length between the planetary gear and the second meshing tooth is D₁Then D is₁The following formula 1 is required to be satisfied; equation 1: Δ d = r₂+h₂-（（h₂+r₂）²-d₃ ²）^0.5；Δd＜D₁＜max{h₂-Δd，h₃- Δ d }; wherein Δ d is a variation value of the meshing overlap length in the process of converting the standby state and the unlocking state; when the fingerprint identification assembly is in the unlocking state, the planetary gear and the second meshing tooth are in a meshing state.

Compared with the prior art, the technical scheme has the following technical effects: in combination with the limitation on the change of the distance between the planetary gear and the second meshing tooth under the conversion between the standby state and the unlocking state, on one hand, the planetary gear and the second meshing tooth are prevented from being completely separated due to overlarge distance between the planetary gear and the second meshing tooth, meanwhile, the abrasion between the planetary gear and the second meshing tooth is reduced, and the service life of the fingerprint identification device is further prolonged; on the other hand, the deformation quantity of the elastic plate provided with the first identification platform and correspondingly entering the unlocking state is avoided to be too large, so that the deformation capacity of the elastic plate is invalid, and the elastic plate is difficult to return to the initial state. In addition, when the distance between the first identification platform and the fixed seat is too large, the change of the distance between the planetary gear and the second meshing gear is too large when the first identification platform is switched between the standby state and the unlocking state, which is not beneficial to the stable operation of the fingerprint identification device in the using process.

In an example of the invention, a plurality of partition plates are arranged in the first shell, and the partition plates are arranged at equal intervals and separate each fingerprint identification platform from each other; the fingerprint identification device comprises: the cleaning assembly is arranged in the first shell and corresponds to at least one fingerprint identification platform; wherein the cleaning assembly is disposed adjacent to the first identification platform.

Compared with the prior art, the technical scheme has the following technical effects: when the cleaning tool is prevented from cleaning at least one fingerprint identification platform, cleaning liquid is splashed to other fingerprint identification platforms to cause the fingerprint identification platforms to be polluted, and therefore the rotating use efficiency of the fingerprint identification platforms is improved.

In one example of the invention, the supporting base forms an adjusting area from the center of the supporting base towards the direction of the first meshing tooth; the conditioning region includes: the first adjusting area is correspondingly provided with the adjusting opening; a second meshing region located between the first regulation region and the corresponding first meshing tooth, and forming a support base plate for supporting the planetary gear corresponding to the second meshing region; when the planetary gear is located in the second meshing area, the circle center of the planetary gear is arranged on the supporting bottom plate.

Compared with the prior art, the technical scheme has the following technical effects: the elastic plate that will be equipped with first discernment platform is defined into first elastic plate, then, when fingerprint identification device got into the state of unblanking, avoids first elastic plate shape variable too big, leads to taking place to break away from with planetary gear for planetary gear unbalance drops from supporting the base. That is, due to the supporting function of the supporting bottom plate, the planet gear is supported to avoid being unbalanced and falling off, for example, the planet gear is clamped between the fixed seat and the supporting base, so that on one hand, the normal rotation of the identification screen is influenced; on the other hand, even make fingerprint identification device can't get into the state of unblanking, specifically speaking, because the planet gear card is established between support base and fixing base for the elastic plate can't contact with the corresponding position of fixing base. In combination with the effect of the adjusting resistor, it is difficult to make the current of the access circuit reach the current value required for unlocking, so that the unlocking fails.

In another aspect, the present invention further provides an intelligent cabinet, including: the equipment cabinet body is provided with an installation position; the fingerprint identification device according to any one of the above embodiments, wherein the fingerprint identification device is arranged on the mounting position; the fingerprint identification device is adjusted to enter the unlocking state, so that the locking structure on the cabinet body can be controlled to be opened.

Compared with the prior art, the technical scheme has the following technical effects: the technical effects corresponding to any one of the above technical solutions can be achieved, and are not described herein again.

In another aspect, the present invention further provides an unlocking method for an intelligent cabinet, where the intelligent cabinet includes the fingerprint identification device as described in any of the above embodiments; the unlocking method comprises the following steps: step S1, when a recognition object is placed on the first recognition platform, controlling the recognition object to execute a first pressing action on the first recognition platform and keeping the first preset time t 1; step S2, determining whether the fingerprint identification device is in the unlocked state according to the first pressing action; if so, controlling the fingerprint identification device to acquire a first identification signal; step S3, judging whether the first identification signal meets the unlocking condition, if not, controlling the fingerprint identification component to release the early warning signal according to the first identification signal; step S4, controlling the identification object to be separated from the contact on the first identification platform; step S5, controlling the rotation of the recognition screen to enable the standby recognition platform to rotate to a position corresponding to the adjustment opening; step S6, controlling the recognition object to be placed on the standby recognition platform corresponding to the adjusting opening; step S7, controlling the fingerprint identification component to execute detection action on the identification object; and executing the detection action, wherein the executing the detection action comprises executing all or part of the steps S1 to S7 in sequence, and controlling to open the locking structure of the intelligent cabinet until the first identification signal meets the unlocking condition.

In one example of the present invention, the step S5 includes: step S51, controlling the recognition screen to rotate around the connection shaft toward a first direction, so that the first recognition platform enters the installation space, and the spare recognition platform rotates to correspond to the adjustment opening; and step S52, controlling a cleaning assembly arranged in the installation space to clean the first identification platform transferred into the installation space.

Compared with the prior art, the technical scheme has the following technical effects: through changing first discernment screen, make it rotate to the installation space in to make clean reserve discernment platform rotate to adjust open-ended position, thereby improve fingerprint identification platform's availability factor.

In one example of the invention, the fingerprint identification area of the fingerprint identification platform corresponds to an identification area b₁The identification area corresponding to the fingerprint identification area of the identification object is a₁Wherein a is₁≤b₁(ii) a The step S3 includes: step S31, judge b₁And a₁Whether the size of the overlapping area corresponding to the overlapping area between the two meets the unlocking condition or not; and step S32, if yes, controlling the fingerprint identification device to open the locking structure.

Compared with the prior art, the technical scheme has the following technical effects: through judging the size of the coincidence area, the accuracy of identifying the user identity is improved, and it can be understood that if the fingerprints on the finger can be completely used for identification, the accuracy of identifying the user identity is judged to be the highest. However, in real life, it is difficult to ensure that the first recognition platform is kept clean, and therefore, the stain on the first recognition platform is kept in a certain area as an acceptable error, namely, the success rate of fingerprint recognition is exchanged by the stain area. Therefore, when the coincidence area does not meet the unlocking condition, the stain on the first identification platform exceeds the preset value at the moment, the first identification screen needs to be replaced, the first identification screen is rotated into the installation space, the clean standby identification platform is rotated to the position of the adjusting opening, and the use efficiency of the fingerprint identification platform is improved.

In one example of the present invention, the first identification signalComprises an error match signal comprising an error match ratio k; wherein,

，a_ithe ith identification area of the identification object at any position on the fingerprint identification area; the step S3 includes: step S33, if the error matching rate meets a preset value, the first identification signal is judged not to meet the unlocking condition; step S34, controlling the fingerprint identification device to record the fingerprint signal corresponding to the identification object; step S35, controlling the fingerprint identification component to release an early warning signal; the ith time and the (i + 1) th time of the identification object correspond to different positions on the fingerprint identification area, and i is more than or equal to 1.

Compared with the prior art, the technical scheme has the following technical effects: in combination with the actual use situation, it is common that the first identification platform has a surface which is seriously worn after long-term use, and in the use process, if the first identification platform is found to have impurities such as small-particle stains, the first identification platform is easy to remove, but when the first identification screen is seriously worn, the first identification platform cannot be processed in a short time, and it is common that the fingerprint identification device is disassembled and the first fingerprint identification device is replaced, so that, on one hand, in the disassembly process, if the user is not operated properly, the whole equipment is easily damaged, and the first identification platform is maintained and replaced, thereby reducing the use experience of the user; on the other hand for the user can't carry out the operation of unblanking in the short time, further reduce the availability factor of equipment and further reduce user and use experience. Therefore, the mismatching signal is utilized to deal with the situation, so that the fingerprint identification device can complete the replacement of the first identification platform in time without additional operation of a user, the use experience of the user is improved, and the service life of the fingerprint identification device is prolonged.

After the technical scheme of the invention is adopted, the following technical effects can be achieved:

(1) on one hand, the problem that fingerprints cannot be identified for a long time due to residual stains on the fingerprint identification platform is avoided, negative use experience is brought to a user, and meanwhile, the use efficiency is reduced due to the fact that the fingerprints cannot be identified for the first time; on the other hand, the operation of replacing the fingerprint identification platform is simple and efficient, and the replacement of the fingerprint identification platform can be completed in a short time without other auxiliary tools;

(2) in combination with the limitation on the change of the distance between the planetary gear and the second meshing tooth under the conversion between the standby state and the unlocking state, on one hand, the planetary gear and the second meshing tooth are prevented from being completely separated due to overlarge distance between the planetary gear and the second meshing tooth, meanwhile, the abrasion between the planetary gear and the second meshing tooth is reduced, and the service life of the fingerprint identification device is further prolonged; on the other hand, the deformation quantity of the elastic plate provided with the first identification platform and correspondingly entering the unlocking state is avoided to be too large, so that the deformation capacity of the elastic plate is invalid, and the elastic plate is difficult to return to the initial state. In addition, when the distance between the first identification platform and the fixed seat is too large, the change of the distance between the planetary gear and the second meshing gear is too large between the standby state and the unlocking state, which is not beneficial to the stable operation of the fingerprint identification device in the use process, particularly, if the movement stroke is too large, the energy released by the elastic potential energy is too large in the rebound process of the elastic plate, so that the time required for the elastic plate to stably return to the initial state is longer, in addition, the tooth surfaces of the planetary gear meshed with the elastic plate can be scratched by the elastic plate, and even the planetary gear meshed with the elastic plate can be bounced away from the movement space;

(3) in combination with the actual use situation, it is common that the first identification platform has a surface which is seriously worn after long-term use, and in the use process, if the first identification platform is found to have impurities such as small-particle stains, the first identification platform is easy to remove, but when the first identification screen is seriously worn, the first identification platform cannot be processed in a short time, and it is common that the fingerprint identification device is disassembled and the first fingerprint identification device is replaced, so that, on one hand, in the disassembly process, if the user is not operated properly, the whole equipment is easily damaged, and the first identification platform is maintained and replaced, thereby reducing the use experience of the user; on the other hand for the user can't carry out the operation of unblanking in the short time, further reduce the availability factor of equipment and further reduce user and use experience. Therefore, the mismatching signal is utilized to deal with the situation, so that the fingerprint identification device can complete the replacement of the first identification platform in time without additional operation of a user, the use experience of the user is improved, and the service life of the fingerprint identification device is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a fingerprint identification apparatus for an intelligent cabinet according to an embodiment of the present invention.

Fig. 2 is a schematic view of the mating connections of the support base, the planetary gear and the identification screen of fig. 1.

Fig. 3 is a schematic structural diagram of the recognition screen in fig. 2.

Fig. 4 is a schematic structural view of the supporting base in fig. 2.

Fig. 5 is a schematic view of the matching connection among the first meshing teeth, the planetary gear, the second meshing teeth and the fixed seat.

FIG. 6 is a simplified circuit diagram of the electrical connection between the fingerprint identification device and the locking structure.

Fig. 7 is a track diagram of the deformation motion of the first elastic plate.

Fig. 8 is a schematic flow chart of an unlocking method provided in the third embodiment of the present invention.

Description of reference numerals:

100-fingerprint recognition means; 10-a support base; 11-adjusting the opening; 12-a first meshing tooth; 13-a support floor; 14-a motion space; 15-adjusting the resistance; 16-a protection resistance; 17-a locking structure; 20-recognition screen; 21-a resilient plate; 211-a first elastic plate; 22-fingerprint recognition platform; 221-a first recognition platform; 222-a standby identification platform; 23-a second meshing tooth; 24-a connecting shaft; 30-a planetary gear; 40-a first housing; 41-avoiding the groove; 50-a fixed seat; 51-first distance.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

The first embodiment is as follows:

referring to fig. 1, a schematic structural diagram of a fingerprint identification apparatus 100 for an intelligent cabinet according to an embodiment of the present invention is shown. Referring to fig. 2 to 7, the fingerprint recognition device 100 includes, for example, a recognition screen 20, a support base 10, a fingerprint recognition assembly, a first housing 40, and a fixing base 50.

Specifically, the recognition screen 20 is provided with, for example, a connection shaft 24 and a plurality of elastic plates 21 fixedly provided around the connection shaft 24. Each elastic plate 21 is provided with a fingerprint identification platform 22, and the elastic plates 21 can deform along the axial direction of the connecting shaft 24; the supporting base 10 is rotatably connected with the connecting shaft 24, and the supporting base 10 is provided with an adjusting opening 11, wherein the identification screen 20 can be rotated to drive the plurality of elastic plates 21 to rotate around the connecting shaft 24 relative to the supporting base 10, so that each fingerprint identification platform 22 can sequentially correspond to the position of the adjusting opening 11.

For example, each of the elastic plates 21 is a fan-shaped structure with the same size and shape, and each fan-shaped structure can be spliced around the connecting shaft 24 to form a flat surface, wherein a movable gap is provided between each adjacent fan-shaped structures, so that when pressure is applied to one of the elastic plates 21, the elastic plate can deform to avoid affecting the state of the other elastic plates 21, and similarly, the elastic plate can be prevented from being arranged close to the adjacent elastic plate 21, so that the pressure force needs to be increased, and the structure of the elastic plate 21 can be damaged.

Further, the fingerprint identification subassembly is located the one side that supports base 10 and keep away from discernment screen 20, also supports base 10 and is located between fingerprint identification subassembly and discernment screen 20, and the setting of fingerprint identification subassembly correspondence regulation opening 11, wherein, the fingerprint identification subassembly is used for discerning the fingerprint signal that corresponds on the fingerprint identification platform 22 of adjusting opening 11.

The first casing 40 is covered on one side of the supporting base 10 far away from the fingerprint identification component, the first casing 40 is provided with an avoiding groove 41, the avoiding groove 41 is used for avoiding the position of the adjusting opening 11, so that the fingerprint identification platform 22 arranged above the adjusting opening 11 is exposed in the air, a user can place a finger on the fingerprint identification platform 22, and the fingerprint on the finger is identified by the fingerprint identification component. And an installation space is provided in the first housing 40; the fingerprint identification platform 22 includes a first identification platform 221 and a spare identification platform 222. Specifically, the first identification platform 221 is disposed outside the installation space and is disposed corresponding to the position of the adjustment opening 11, and the fingerprint identification component is configured to identify a fingerprint disposed on the first identification platform 221; and the spare recognition platform 222 is provided in the installation space.

In other words, the fingerprint recognition platform 22 disposed on the adjustment opening 11 is defined as a first recognition platform 221 for cooperating with the fingerprint recognition assembly, and the fingerprint recognition platform 22 disposed in the installation space is defined as a spare recognition platform 222. In the process of rotating the recognition screen 20, the first recognition platform 221 provided on the adjustment opening 11 can be moved into the installation space and then converted into the spare recognition platform 222, and at the same time, the spare recognition platform 222 originally in the installation space is moved onto the adjustment opening 11 and then converted into the first recognition platform 221. In addition, in order to clarify the relationship between the elastic plate 21 and the first recognition platform 221 and the spare recognition platform 222, for example, the elastic plate 21 provided with the first recognition platform 221 may be named as a first elastic plate 211, and the elastic plate 21 provided with the spare recognition platform 222 may be named as a spare elastic plate.

Further, the fixing seat 50 is disposed on one side of the supporting base 10 away from the first casing 40, and the position of the fixing seat 50 corresponding to the adjusting opening 11 is provided with an adjusting resistor 15; if the distance between the identification screen 20 and the adjusting resistor 15 meets the identification condition, the fingerprint identification component enters an unlocking state to identify a fingerprint signal; otherwise, the fingerprint identification component is in a standby state. The size of the adjustment opening 11 is slightly larger than the size of the first identification platform 221, so that the first elastic plate 211 passes through the adjustment opening 11 and acts on the adjustment resistor 15 in the process of pressing the first identification platform 221.

Referring to fig. 6, in one embodiment, the adjusting resistor 15 is connected in series with a circuit in which the fingerprint identification device is located, and a protection resistor 16 is further disposed in the circuit. When the first identification platform 221 is in the standby state, the resistance of the adjusting resistor 15 accessing the circuit is the maximum value, and accordingly, a first current is formed in the circuit, and in the process that the distance between the first elastic plate 211 and the adjusting resistor 15 is gradually reduced along with the pressing of the first identification platform 221, the effective resistance of the adjusting resistor 15 accessing the circuit is gradually reduced, so that the current in the circuit is gradually increased. When the fingerprint identification device 100 is applied to an intelligent cabinet, for example, the fingerprint identification device 100 and the locking structure 17 of the intelligent cabinet can be electrically connected in series. Thus, for example, a current threshold may be defined when the current in the circuit is the second current, i.e., the preset unlocking condition is reached, so that the fingerprint identification device 100 can perform an unlocking operation on the locking structure 17. When the current in the circuit is the first current, it means that the current in the circuit is too small, and although the first current still can satisfy the condition that the fingerprint identification device 100 enters the unlocking state, the first current is considered to be smaller than the second current, and is not enough to satisfy the current threshold of the preset unlocking condition. For example, an identification object capable of corresponding to the unlocking of the locking structure 17 is applied to the first identification platform 221, but since the current does not satisfy the current threshold of the preset unlocking condition, the fingerprint identification device 100 cannot be supplied with enough power to complete the unlocking action of the locking structure 17. The adjusting resistor 15 is, for example, a sliding resistor.

In one embodiment, the correct fingerprint of the user is entered into the fingerprint identification device 100, so that the user places a finger on the first identification platform 221 and applies a pressure toward the adjustment opening 11, thereby moving the end of the first elastic plate 211 where the first identification platform 221 is disposed toward the direction close to the adjustment resistor 15, until the effective resistance of the adjustment resistor 15 connected to the circuit meets the current threshold of the second current, so that the fingerprint identification component performs an unlocking operation.

In combination with a specific use scenario, for example, when stains exist on the first recognition platform 221, and the fingerprint recognition assembly is difficult to accurately recognize, the recognition screen 20 can be rotated to enable the spare recognition platform 222 located in the installation space to return to the position corresponding to the adjustment opening 11, that is, the fingerprint recognition platform 22 is replaced, so that the function of accurately recognizing the fingerprint is improved, on one hand, the problem that the fingerprint cannot be recognized for a long time due to the stains remaining on the fingerprint recognition platform 22 is avoided, negative use experience is brought to a user, and meanwhile, the use efficiency is reduced due to the fact that the fingerprint cannot be recognized for the first time; on the other hand, the operation of replacing the fingerprint identification platform 22 is simple and efficient, and the replacement of the fingerprint identification platform 22 can be completed in a short time without using other auxiliary tools, and in addition, because the spare identification platform 222 is arranged in the installation space, the spare identification platform is prevented from being exposed to the air, so that a large amount of impurities such as dust and the like are attached to the spare identification platform 222, and the overall efficiency of the fingerprint identification device 100 is reduced. Further, in order to improve the utilization efficiency of the fingerprint identification device 100, for example, the number of the fingerprint identification platforms 22 may be set to be plural, for example, the number of the fingerprint identification platforms 22 may be 6, so that when one of the platforms is exposed to the air for identifying the fingerprint, the remaining 5 fingerprint identification platforms 22 are still disposed in the installation space, that is, the user can smoothly complete the fingerprint identification effect in a short time by rotating.

In the related fingerprint identification device, for example, a cleaning tool is disposed near the fingerprint identification area, and since it is common that the fingerprint identification platform 22 is often exposed to the air, in the related art, in order to clean the fingerprint identification platform 22 conveniently, the cleaning tool is also often exposed to the air, specifically, the cleaning member such as a cleaning roller disposed on the slider is driven by the driving motor to wipe back and forth on the surface of the fingerprint identification platform 22 by using the slider-sliding rail matching mode, and more specifically, the cleaning liquid is mixed into the cleaning member, so as to further enhance the cleaning effect. However, on the one hand, since the cleaning tool is exposed to the air, it is inevitable to accumulate a large amount of dust when the cleaning tool is used for a long time, and then, when the fingerprint identification platform 22 is wiped, only the stains on the fingerprint identification platform 22 are further increased, and the overall structure of the cleaning tool is complex and the operation speed is slow, so that the user is required to wait for a period of time when the cleaning function is started, and the fingerprint identification can be performed only after the water stains on the fingerprint identification plane are dried and the cleaning function is closed, and thus, the whole fingerprint identification process is very complicated, and the efficiency is low. If the cleaning elements are dirty and need to be replaced at the first time, the burden of the user is further increased.

In summary, in combination with the technical solution, in consideration of the fact that the user identity information is identified by identifying the fingerprint, the fingerprint identification platform 22 can be designed to be slightly larger than the size of the finger of the user with the fingerprint, and correspondingly, for example, the fingerprint identification platform 22 can be set at the end of the elastic plate 21 far away from the connecting shaft 24, so that the elastic plate 21 is more labor-saving in the process of pressing, and meanwhile, the elastic plate 21 is reasonably utilized, thereby avoiding the waste of materials caused by the idle end of the elastic plate 21 far away from the connecting shaft 24.

Further, the rotation of the identification screen 20 can be adjusted by, for example, manual adjustment, or by providing a driving assembly, specifically, the driving assembly is rotatably connected to the connecting shaft 24, so as to replace manual operation to complete the rotation adjustment of the identification screen 20. Specifically, the driving assembly includes, for example, a driving motor, so that when the driving motor is driven, one of the fingerprint identification platforms 22 can accurately correspond to the position of the adjustment opening 11 during the process of rotating the fingerprint identification screen 20, for example, the hall element can calculate the number of steps of rotating the fingerprint identification platform 22, so as to define the determined preset number of steps into the fingerprint identification device 100.

Preferably, the support base 10 completely covers the identification screen 20, and the support base 10 is a disk arrangement; the fingerprint recognition device 100 includes, for example, a plurality of first engaging teeth 12 and a plurality of planetary gears 30. Specifically, the plurality of first engaging teeth 12 are arranged around the supporting base 10, and the teeth of the first engaging teeth 12 face the center of the supporting base 10, wherein one end of the plurality of elastic plates 21 away from the connecting shaft 24 is provided with a plurality of second engaging teeth 23; the plurality of planetary gears 30 are interposed in the movement space 14 composed of the plurality of first engaging teeth 12 and the plurality of second engaging teeth 23, and the planetary gears 30 are engaged with the first engaging teeth 12 and the second engaging teeth 23.

In one embodiment, the supporting base 10 is fixedly connected to the first engaging tooth 12, and in order to avoid the first housing 40 rotating during the rotation of the identification screen 20, which may affect the effect of exposing the first identification platform 221, specifically, prevent the first housing 40 from partially covering the identification screen 20, for example, fixedly connecting the first housing 40 to the supporting base 10. It should be noted that, in order to avoid exposing the moving space 14 to the air, which causes impurities such as dust to remain therein, and increase the abrasion condition in the process of meshing and rotating the planetary gear 30, the first meshing tooth 12 and the second meshing tooth 23, a cover plate may be disposed at a position corresponding to the moving space 14, specifically, the cover plate is connected to the first housing 40 and the supporting base 10, and is interposed between the supporting base 10 and the first housing 40, on one hand, the cover plate may play a role of protecting the transmission assembly composed of the planetary gear 30, the first meshing tooth 12 and the second meshing tooth 23, and avoid the abrasion in the transmission process of the transmission assembly due to excessive dust accumulation; on the other hand, exposure of the transmission assembly to the user's implementation is avoided, reducing the aesthetic appearance of the fingerprint identification device 100.

On the basis of the above specific example, in another specific example, because the plurality of planetary gears 30 are arranged around the identification screen 20, the adjustment identification screen 20 can be more stably operated in the rotating process, and the first identification platform 221 can be accurately moved to the position corresponding to the adjustment opening 11, that is, the phenomenon that the first identification platform 221 cannot accurately fall to the position corresponding to the adjustment opening 11 due to the slippage of the identification screen 20 under the driving action of the driving assembly is avoided, so that the effect of the subsequent fingerprint identification device 100 on unlocking is influenced.

Further, the first engaging teeth 12, the second engaging teeth 23 and the planetary gears 30 are all provided on the same side of the supporting base 10On the surface; the tooth height of the first tooth system 12 is h₁The tooth height of the second meshing tooth 23 is h₂The tooth height of the planetary gear 30 is h₃The root radius of the second tooth system 23 is r₂The first meshing distance d is formed between the root circle of the first meshing tooth 12 with which the planetary gear 30 meshes₁A second meshing distance d is formed between the tooth root circle of the second meshing tooth 23 with which the planetary gear 30 meshes₂(ii) a Wherein d is not less than 0₁≤（2/3）h₁，0≤d₂≤（2/3）h₂(ii) a When the fingerprint identification module is in the standby state, the distance between the first identification platform 221 and the fixing base 50 is the first distance 51, and the first distance 51 is denoted as d₃When the fingerprint recognition assembly is in the unlocked state, the meshing overlap length between the planetary gear 30 and the second meshing tooth 23 is D₁Then D is₁The following equation 1 is satisfied:

equation 1: Δ d = r₂+h₂-（（h₂+r₂）²-d₃ ²）^0.5；Δd＜D₁＜max{h₂-Δd，h₃- Δ d }, wherein Δ d is a change value of the meshing overlap length during the transition between the standby state and the unlocked state;

when the fingerprint identification assembly is in the unlocking state, the planetary gear 30 and the second meshing tooth 23 are in the meshing state.

In one embodiment, when the fingerprint identification module is in the unlocked state, i.e. the first elastic plate 211 is made to apply pressure to the adjustment resistor 15 towards the fixed seat 50, so as to reduce the effective resistance value of the adjustment resistor 15 in the circuit. It should be noted that one end of the first elastic plate 211 is fixed to the connecting shaft 24, so that when the recognition object presses the first recognition platform 221, the first elastic plate 211 is close to the fixing seat 50 around the portion fixedly connected to the connecting shaft 24. In an ideal state, only the connection position of the first elastic plate 211 and the connection shaft 24 is deformed, and the first elastic plate 211 can be regarded as a flat plate as a whole, and in addition, d formed between the fixed seat 50 and the first elastic plate 211₃Accordingly, the movement path of the first elastic plate 211 toward the direction approaching the fixed seat 50 can be approximately regarded as a circular arc movement.

More specifically, when the first recognition platform 221 is not provided with a recognition object, the first elastic plate 211 and the planetary gear 30 are parallel to each other, and when the fingerprint recognition assembly enters the unlocking state, the first elastic plate 211 performs the circular motion as described above, and at this time, the first elastic plate 211 is inclined with respect to the planetary gear 30. Therefore, in the process of the circular arc motion of the first elastic plate 211, the distance between the second engaging tooth 23 and the planetary gear 30 is continuously increased, which causes the second engaging tooth 23 and the planetary gear 30 to be separated from each other, so that after the identification object is separated from the first identification platform 221, the second engaging tooth 23 and the planetary gear 30 are engaged again, and the identification screen 20 cannot rotate around the connecting shaft 24, thereby causing the replacement failure of each fingerprint identification platform 22, and finally causing the failure of the replacement of the fingerprint identification platform 22.

Furthermore, it may occur that the second engaging teeth 23 are located between the planetary gear 30 and the fixed base 50, so that the first elastic plate 211 is moved in the opposite direction to the above-mentioned circular arc movement by the self-elastic force after the recognition object is removed from the first elastic plate 211, and similarly, when the planetary gear 30 is separated from the first elastic plate 211, it is difficult to ensure that the planetary gear 30 is kept stationary with respect to the supporting base 10, and then, when the second engaging teeth 23 are brought into contact with the planetary gear 30 again, the planetary gear 30 engaged therewith is ejected from the movement space 14 by the self-elastic force.

In addition, when the above-mentioned latch condition occurs, the abrasion between the planetary gear 30 and the second engagement teeth 23 is easily increased, thereby causing a reduction in the service life of the fingerprint recognition device 100.

Then, in conjunction with the content of the present technical solution, when the identification object is pressed against the first identification platform 221, the tooth end of the second meshing tooth 23 contacts with the corresponding end of the fixed seat 50, and then in the process, the distance between the second meshing tooth 23 and the planetary gear 30 increases by Δ d, and Δ d = r₂+h₂-（（h₂+r₂）²-d₃ ²）^0.5. Thus, the meshing overlap length of the mutual meshing between the planetary gear 30 and the second meshing tooth 23 at this time is reduced by Δ d.

Specifically, when the fingerprint recognition device 100 is in the standby state, the meshing overlap length Δ d between the planetary gear 30 and the second meshing tooth 23 needs to be ensured, so that the planetary gear 30 and the second meshing tooth 23 are still in the meshing state after the fingerprint recognition device 100 enters the unlocking state from the standby state.

In addition, when the distance between the first identification platform 221 and the fixed seat 50 is too large, the distance between the planetary gear 30 and the second meshing tooth 23 is too large when the standby state and the unlocking state are switched, on one hand, the deformation amount of the first elastic plate 211 is too large, so that the deformation capability of the first elastic plate 211 is disabled, that is, the first elastic plate 211 is difficult to return to the initial state; in addition, when the movement stroke of the corresponding second engaging tooth 23 is too large, it is not beneficial to the stable operation of the fingerprint identification device 100 in the actual use process, specifically, if the movement stroke is too large, the energy released by the elastic potential energy of the first elastic plate 211 in the rebound process is too large, and the time required for the first elastic plate 211 to stably return to the initial state is relatively long; on the other hand, the first elastic plate 211 is also caused to scrape the tooth surface of the planetary gear 30 with which it is engaged.

Further, may be taken D₁Has a maximum value of max { h₂-Δd，h₃Δ D, i.e. taking D₁Is (h)₂Δ d) or (h)₃-a maximum value of Δ d). Therefore, the fingerprint identification device 100 is switched between the unlocking state and the standby state, and the situation that the fingerprint identification device 100 generates the trend that the distance between the planetary gear 30 and the second meshing tooth 23 is reduced and the teeth of the planetary gear 30 and the second meshing tooth 23 are extruded towards each other to cause the abrasion caused by extrusion and even cause the abrasion caused by extrusion in the process of switching the unlocking state to the standby state because the meshing overlapping length between the planetary gear 30 and the second meshing tooth 23 reaches the maximum value in the unlocking state, namely, the lower tooth height of the planetary gear 30 and the second meshing tooth 23 is completely overlapped on the tooth surface of the other one of the two teeth is avoidedSo that the two are stuck. In the process of combining the rotation of the identification screen 20, because the two are locked or meshed too compactly, on one hand, the function of rotating the identification screen 20 to complete the replacement of the fingerprint identification platform 22 is disabled; on the other hand, the meshed teeth are easy to break off and other accidents happen.

In summary, to solve the above possible problems, Δ D < D is taken₁＜max{h₂-Δd，h₃-Δd}。

It should be noted that the respective tooth thicknesses of the planetary gear 30 and the second meshing tooth 23 are not necessarily related, and only the corresponding heights of the two are required to be partially overlapped all the time in the switching process between the unlocking state and the standby state.

Preferably, a plurality of partition plates are arranged in the first housing 40, and the partition plates are arranged at equal intervals to separate each fingerprint identification platform 22 from each other; the fingerprint recognition device 100 includes, for example, a cleaning assembly. The cleaning component is arranged in the first shell 40 and is arranged corresponding to at least one fingerprint identification platform 22; wherein the cleaning assembly is disposed adjacent to the first recognition platform 221. For example, the fingerprint identification platform 22 may be designed as a groove formed on the elastic plate 21, specifically, the fingerprint identification platform 22 is recessed toward the supporting base 10, so that the user can place the identification object therein, i.e., the guiding function is performed, and it is avoided that the user cannot accurately place a finger therein, thereby affecting the identification effect of the fingerprint identification device 100.

In a specific example, because the fingerprint identification platforms 22 are separated from each other by the partition boards, when a cleaning tool is used for cleaning at least one of the fingerprint identification platforms 22, the cleaning liquid is prevented from splashing to other fingerprint identification platforms 22 to cause the fingerprint identification platforms 22 to be polluted, so that the rotating use efficiency of the fingerprint identification platforms 22 is improved. Wherein the cleaning tool comprises a cleaning drum, for example, which is correspondingly disposed above the vertical direction of each fingerprint identification platform 22 and keeps a second distance from the corresponding fingerprint identification platform 22. Therefore, when the fingerprint identification platform 22 needs to be cleaned, the cleaning drum is controlled to move close to the fingerprint identification platform 22, and after the cleaning is finished, the cleaning drum is reset. Specifically, each time the recognition screen 20 is rotated by one unit, the cleaning drum is caused to clean the first recognition platform 221 rotated into the installation space. Each unit corresponds to an angle value required for rotating the recognition screen 20 to turn the first recognition platform 221 into the installation space. For example, six fingerprint recognition platforms 22 are provided on the recognition screen 20, so that each unit corresponds to an angle of 60 °. For example, when the recognition screen 20 is rotated by 60 ° in the first direction, the first recognition platform 221 is moved into the installation space and cleaned by the cleaning drum, and at the same time, the spare recognition platform 222 disposed adjacent to the first recognition platform 221 is rotated from the installation space to a position corresponding to the adjustment opening 11 for use with the recognition object.

Preferably, the supporting base 10 forms an adjustment zone from the centre of the supporting base towards the first toothing 12; the adjustment region includes a first adjustment region and a second engagement region. It is to be noted that the adjustment opening 11 is provided in the first adjustment region; the second meshing area is located between the first adjustment area and the respective first meshing tooth 12, and a support base plate 13 for supporting the planetary gear 30 is formed corresponding to the second meshing area; when the planetary gear 30 is located in the second meshing area, the center of the circle of the planetary gear 30 is located on the supporting base plate 13. Thus, when the fingerprint recognition device 100 enters the unlocked state, the deformation of the first elastic plate 211 is prevented from being too large, which causes the first elastic plate to disengage from the planetary gear 30, so that the planetary gear 30 falls off the support base 10 in an unbalanced manner. That is, due to the supporting function of the supporting bottom plate 13, the planetary gear 30 is supported to avoid being unbalanced and falling off, for example, the planetary gear is clamped between the fixing seat 50 and the supporting base 10, on one hand, the normal rotation replacement of the identification screen 20 is affected; on the other hand, even the fingerprint recognition device 100 cannot enter the unlocking state, specifically, the planet gear 30 is clamped between the supporting base 10 and the fixed seat 50, so that the elastic plate 21 cannot contact with the fixed seat 50 at a corresponding position. In combination with the effect of the adjusting resistor 15, it is difficult to make the current of the connected circuit reach the current value required for unlocking, for example, so that the unlocking fails.

Example two:

the embodiment of the invention provides an intelligent cabinet. Specifically, the intelligent cabinet includes, for example, a cabinet body and the fingerprint identification device 100 as described in the first embodiment. Wherein, the cabinet body is provided with an installation position for installing the fingerprint identification device 100. Specifically, the fingerprint identification device 100 is adjusted to enter the unlocking state, so that the locking structure 17 on the cabinet body can be controlled to be unlocked.

The present embodiment can achieve the technical effect corresponding to any technical solution provided in the first embodiment, and details are not described here.

Example three:

referring to fig. 8, it is a schematic flowchart of an unlocking method for an intelligent cabinet according to a third embodiment of the present invention. With reference to fig. 1 to 7, the intelligent cabinet in the present embodiment includes, for example, the fingerprint identification device 100 provided in the first embodiment. Specifically, the unlocking method includes, for example:

a step S1 of controlling the recognition object to perform a first pressing action on the first recognition platform 221 and maintaining the first preset time t1 when the recognition object is placed on the first recognition platform 221;

step S2, determining whether the fingerprint recognition device 100 is in an unlocked state based on the first pressing action; if yes, controlling the fingerprint identification device 100 to acquire a first identification signal;

step S3, judging whether the first identification signal meets the unlocking condition, if not, controlling the fingerprint identification component to release the early warning signal according to the first identification signal;

step S4, controlling the recognition object to be out of contact from the first recognition platform 221;

step S5, controlling the rotation recognition screen 20 to rotate the standby recognition platform 222 to the position corresponding to the adjustment opening 11;

step S6, controlling the recognition object to be placed on the standby recognition platform 222 corresponding to the adjustment opening 11;

step S7, controlling the fingerprint identification component to execute detection action on the identification object; wherein, the performing of the detecting action includes sequentially performing all or part of the above steps S1 to S7 until the first identification signal satisfies the unlocking condition, and then controlling to open the locking structure 17 of the intelligent cabinet.

In a specific example, the adjusting resistor 15 is connected in series with the fingerprint identification component, after a user places an identification object, that is, a finger on the first identification platform 221, and applies pressure to the first identification platform 221, so that the resistance of the adjusting resistor 15, which is clamped between the first elastic plate 211 and the fixed seat 50, in the access circuit is reduced, the pressure is maintained for the first preset time t1, so that the current in the circuit connected in series with the fingerprint identification component reaches the second current, or the first elastic plate 211 abuts against the fixed seat 50, and at this time, the fingerprint identification device 100 enters the unlocking state, so as to obtain the first identification signal.

The content corresponding to the first identification signal includes, for example, a degree of the first identification platform 221 being covered by the dirt or a degree of wear of the first identification platform 221. Therefore, when the area covered by the stain on the first recognition platform 221 reaches the set value inside the fingerprint recognition device 100, it is determined that the first recognition signal does not satisfy the unlocking condition, and at this time, in order to remind the user to take the finger away in time, for example, the fingerprint recognition device 100 is made to emit a flashing light or a voice playing mode, so as to remind the user to take the finger away in time.

When the user removes the recognition object from the first recognition platform 221, the first elastic plate 211 is returned to the standby state by its own elastic force, that is, the first elastic plate 211 is kept parallel to the planetary gear 30. At this time, the fingerprint recognition module determines that the recognition object has been removed from the first recognition platform 221 according to the current change in the circuit, and controls to rotate the recognition screen 20 so that the spare recognition platform 222 provided in the installation space is rotated to a position corresponding to the adjustment opening 11. It should be noted that, when the fingerprint identification device 100 is switched from the standby state to the unlock state, the current of the internal circuit thereof may be interpreted as being switched from the low level to the high level, whereas, when the high level is switched to the low level, the current may be interpreted as a negative value, and when the variation of the negative value satisfies the threshold value set inside the fingerprint identification device 100, it is determined that there is no identification object on the first identification platform 221, so that the fingerprint identification device 100 can smoothly complete the operation of the rotating fingerprint identification platform 22. In other words, whether the increase amount of the circuit is a negative value or a positive value, is an operation action according to the amount of change in the effective resistance of the adjusting resistor 15 access circuit. And the threshold value set inside the fingerprint identification device 100 is used to avoid misjudging the relationship between the identification object and the first identification platform 221. For example, if the first elastic plate 211 is used to make the resistance of the access circuit of the adjusting resistor 15 slightly change, that is, not meet the requirement of the threshold value, under the condition that the identification object still applies a part of the pressure force, the first elastic plate is kept in the standby state or the unlocking state, that is, the state of the fingerprint identification device 100 is kept unchanged, and thus, the fingerprint identification platform 22 is not rotated when the first identification signal is not satisfied.

After that, when the rotation replacement of the fingerprint recognition platform 22 is completed, the recognition object is placed on the replaced first recognition platform 221 again, and the detection action is performed again, specifically, the steps S1-S6 need to be performed at least partially once. For example, steps S1-S3 are repeatedly executed, and if the first identification signal satisfies the unlocking condition in S3, the fingerprint identification device 100 is controlled to open the locking structure 17 on the intelligent cabinet, that is, the unlocking task is completed. Otherwise, if the first identification signal still does not satisfy the unlocking condition, the fingerprint identification device 100 is controlled to continue to perform steps S4-S7 until the unlocking condition is satisfied, which is not described herein again.

Preferably, step S5 includes:

step S51, controlling the recognition screen 20 to rotate around the connection shaft 24 toward the first direction, so that the first recognition platform 221 enters the installation space, and the spare recognition platform 222 rotates to correspond to the adjustment opening 11;

in step S52, the cleaning assembly disposed in the installation space is controlled to clean the first recognition platform 221 transferred into the installation space.

Preferably, the fingerprint identification area of the fingerprint identification platform 22 corresponds to an identification area b₁The identification area corresponding to the fingerprint identification area of the identification object is a₁Wherein a is₁≤b₁(ii) a S3 includes: step S31, judgmentb₁And a₁Whether the size of the overlapping area corresponding to the overlapping area between the two meets the unlocking condition or not; in step S32, if yes, the fingerprint identification device 100 is controlled to unlock the locking mechanism 17. Through judging the size of the coincidence area, the accuracy of identifying the user identity is improved, and it can be understood that if the fingerprints on the finger can be completely used for identification, the accuracy of identifying the user identity is judged to be the highest. However, in real life, it is difficult to ensure that the first recognition platform 221 is kept clean, and therefore, the stain on the first recognition platform 221 is kept in a certain area as an acceptable error, that is, the success rate of fingerprint recognition is exchanged by the stain area. Therefore, when the overlapping area does not satisfy the unlocking condition, which means that the dirt on the first identification platform 221 exceeds the preset value, the first identification platform 221 needs to be replaced, and the first identification platform 221 is rotated into the installation space, so that the clean standby identification platform 222 is rotated to the position of the adjustment opening 11, and the use efficiency of the fingerprint identification platform 22 is improved.

Preferably, the first identification signal comprises an error match signal, the error match signal comprising an error match ratio k; wherein,

，a_ithe ith identification area of the identification object at any position on the fingerprint identification area; the step S3 includes:

step S33, if the mismatching rate of the fingerprint identification device 100 to the identification object applied to the first identification platform 221 satisfies the preset value, determining that the first identification signal does not satisfy the unlocking condition;

step S34, controlling the fingerprint recognition device 100 to record a fingerprint signal corresponding to the recognition object;

step S35, controlling the fingerprint identification component to release the early warning signal; the ith time and the (i + 1) th time of the identification object correspond to different positions on the fingerprint identification area, and i is more than or equal to 1.

In a specific example, it is common that the surface of the first identification platform 221 is worn seriously after a long-term use, and in the use process, if the first identification platform 221 is found to have impurities such as small-particle stains, the first identification platform is easy to remove, but when the first identification platform 221 is worn seriously, the first identification platform cannot be handled in a short time, and it is common to detach the fingerprint identification device 100 and replace the first fingerprint identification device 100, so that, on one hand, in the detachment process, if the user is not operating properly, the whole device is easy to be damaged, and the first identification platform 221 is repaired and replaced, thereby reducing the use experience of the user; on the other hand for the user can't carry out the operation of unblanking in the short time, further reduce the availability factor of equipment and further reduce user and use experience.

Therefore, in combination with the present technical solution, the mismatch signal is utilized to cope with the above situation, so that the fingerprint identification apparatus 100 completes replacement of the first identification platform 221 in time without additional operation of the user, thereby improving the user experience, i.e., prolonging the service life of the fingerprint identification apparatus 100. Specifically, the method is used for representing the identification area ratio of the ith identification object on the fingerprint identification area; k is used to represent the average recognition area ratio of the recognition object over the fingerprint recognition area n times in total. The closer the average recognition area ratio is to 1, the lower the wear degree of the first recognition platform 221 is, that is, the smaller the error matching ratio is, the closer the value of k is to 1. It should be noted that the positions of the identification object on the fingerprint identification area at the ith time and the (i + 1) th time are limited to be different, so as to reduce the misjudgment of the wear condition of the first identification platform 221, that is, to avoid that the ith time and the (i + 1) th time are selected to be pressed at the same position of the first identification platform 221, which causes the misjudgment.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a fingerprint identification device of intelligence rack which characterized in that includes:

the identification screen is provided with a connecting shaft and a plurality of elastic plates fixedly arranged around the connecting shaft, and each elastic plate is provided with a fingerprint identification platform; the elastic plate can deform along the axial direction of the connecting shaft;

the supporting base is rotatably connected with the connecting shaft and provided with an adjusting opening; wherein the identification screen is rotated so that each fingerprint identification platform can correspond to the position of the adjustment opening;

the fingerprint identification assembly is arranged on one side, far away from the identification screen, of the supporting base and corresponds to the adjusting opening; the fingerprint identification component is used for identifying a fingerprint signal on the corresponding fingerprint identification platform;

the first shell is covered on one side of the supporting base, which is far away from the fingerprint identification component, and an installation space is arranged in the first shell; the fingerprint identification platform comprises a first identification platform and a standby identification platform, the first identification platform is arranged outside the installation space, the standby identification platform is arranged in the installation space, and the first identification platform corresponds to the position of the adjusting opening;

the fixing seat is arranged on one side, far away from the first shell, of the supporting base, and an adjusting resistor is arranged at the position, corresponding to the adjusting opening, of the fixing seat;

if the distance between the identification screen and the adjusting resistor meets the unlocking condition, the fingerprint identification component enters an unlocking state to unlock the locking structure of the intelligent cabinet; otherwise, the fingerprint identification component is in a standby state.

2. The fingerprint recognition device of claim 1, wherein the support base completely covers the recognition screen, and the support base is a disc arrangement; the fingerprint identification device comprises:

the first meshing teeth are arranged around the supporting base in a surrounding mode, and teeth of the first meshing teeth face to the circle center position of the supporting base; one end of each elastic plate, which is far away from the connecting shaft, is provided with a plurality of second meshing teeth;

and the planetary gears are clamped in a motion space formed by the plurality of first meshing teeth and the plurality of second meshing teeth, and are meshed with the first meshing teeth and the second meshing teeth.

3. The fingerprint recognition device according to claim 2, wherein said first engagement teeth, said second engagement teeth and said planet gears are all provided on the same side of said support base;

the tooth height of the first meshing tooth is h₁The tooth height of the second meshing tooth is h₂The tooth height of the planet gear is h₃The root circle radius of the second meshing tooth is r₂；

A first meshing distance d is formed between the tooth root circle of the first meshing tooth meshed with the planetary gear₁A second meshing distance d is formed between the tooth root circle of the second meshing tooth meshed with the planetary gear₂(ii) a Wherein d is not less than 0₁≤（2/3）h₁，0≤d₂≤（2/3）h₂；

When the fingerprint identification assembly is in a standby state, the distance between the first identification platform and the fixed seat is a first distance d₃When the fingerprint identification component is in an unlocking state, the meshing overlapping length between the planetary gear and the second meshing tooth is D₁Then D is₁The following formula 1 is required to be satisfied;

equation 1: Δ d = r₂+h₂-（（h₂+r₂）²-d₃ ²）^0.5；Δd＜D₁＜max{h₂-Δd，h₃- Δ d }; wherein Δ d is a variation value of the meshing overlap length in the process of converting the standby state and the unlocking state;

when the fingerprint identification assembly is in the unlocking state, the planetary gear and the second meshing tooth are in a meshing state.

4. The fingerprint recognition device of claim 2, wherein a plurality of partition plates are disposed in the first housing, and the partition plates are disposed at equal intervals to separate each of the fingerprint recognition platforms from each other; the fingerprint identification device comprises:

the cleaning assembly is arranged in the first shell and corresponds to at least one fingerprint identification platform;

wherein the cleaning assembly is disposed adjacent to the first identification platform.

5. The fingerprint recognition device according to any one of claims 2 to 4,

the supporting base forms an adjusting area from the circle center of the supporting base to the direction of the first meshing teeth; the conditioning region includes:

the first adjusting area is correspondingly provided with the adjusting opening;

a second meshing region located between the first regulation region and the corresponding first meshing tooth, and forming a support base plate for supporting the planetary gear corresponding to the second meshing region;

when the planetary gear is located in the second meshing area, the circle center of the planetary gear is arranged on the supporting bottom plate.

6. An intelligent cabinet, comprising:

the equipment cabinet body is provided with an installation position;

the fingerprint recognition device according to any one of claims 1-5, wherein said fingerprint recognition device is disposed on said mounting location;

the fingerprint identification device is adjusted to enter the unlocking state, so that the locking structure on the cabinet body can be controlled to be opened.

7. An unlocking method of an intelligent cabinet, wherein the intelligent cabinet comprises the fingerprint identification device as claimed in any one of claims 1 to 5; the unlocking method comprises the following steps:

step S1, when a recognition object is placed on the first recognition platform, controlling the recognition object to execute a first pressing action on the first recognition platform and keeping the first preset time t 1;

step S2, determining whether the fingerprint identification device is in the unlocked state according to the first pressing action; if so, controlling the fingerprint identification device to acquire a first identification signal;

step S4, controlling the identification object to be separated from the contact on the first identification platform;

step S5, controlling the rotation of the recognition screen to enable the standby recognition platform to rotate to a position corresponding to the adjustment opening;

step S6, controlling the recognition object to be placed on the standby recognition platform corresponding to the adjusting opening;

step S7, controlling the fingerprint identification component to execute detection action on the identification object; and executing the detection action, wherein the executing the detection action comprises executing all or part of the steps S1 to S7 in sequence, and controlling to open the locking structure of the intelligent cabinet until the first identification signal meets the unlocking condition.

8. The unlocking method according to claim 7, wherein the step S5 includes:

step S51, controlling the recognition screen to rotate around the connection shaft toward a first direction, so that the first recognition platform enters the installation space, and the spare recognition platform rotates to correspond to the adjustment opening;

and step S52, controlling a cleaning assembly arranged in the installation space to clean the first identification platform transferred into the installation space.

9. The unlocking method according to claim 7, wherein the fingerprint identification area of the fingerprint identification platform corresponds to an identification area b₁The identification area corresponding to the fingerprint identification area of the identification object is a₁Wherein a is₁≤b₁(ii) a The step S3 includes:

step S31, judge b₁And a₁Whether the size of the overlapping area corresponding to the overlapping area between the two meets the unlocking condition or not;

and step S32, if yes, controlling the fingerprint identification device to open the locking structure.

10. The unlocking method according to claim 7, wherein the first identification signal includes a mismatch signal, the mismatch signal including a mismatch ratio k; wherein,

，a_ithe identification area of the identification object at any position on the fingerprint identification area for the ith time; the step S3 includes:

step S33, if the error matching rate meets a preset value, the first identification signal is judged not to meet the unlocking condition;

step S34, controlling the fingerprint identification device to record the fingerprint signal corresponding to the identification object;

step S35, controlling the fingerprint identification component to release an early warning signal;

the ith time and the (i + 1) th time of the identification object correspond to different positions on the fingerprint identification area, and i is more than or equal to 1.