40 results about "Fingers skin" patented technology

The invention discloses a fingerprint identification display device, and a manufacturing method and a drive method of the fingerprint identification display device. A plurality of photosensitive sensing units are arranged at the inner part of a display device; every photosensitive sensing unit includes a photosensitive diode used for sensing light intensity change in fingerprint pressing, and a control switch transistor for controlling the photosensitive diode to transform the light intensity change to different potential outputs; the display device further comprises a part for emitting the sensible light of the photosensitive diode. When fingers of a user close to the surface of the device, for the finger skin surface has uneven ridge and valley, the light intensity of irradiating the sensible light of the photosensitive diode sent by the display device to the ridge of the finger is different to the light intensity of the photosensitive diode reflecting valley position to the photosensitive sensing unit. The light intensity difference is transformed to be current signal difference, thus the detection of fingerprint is realized; the photosensitive sensing unit can detect the fingerprint on the basis of the photosensitive effect, and is not easy disturb internal parts of the display device, and easy to realize the high-quality fingerprint detection.

The invention relates to a touch representation device based on electrostatic force, belonging to a touch representation device. The touch representation device comprises an electrostatic force touch representation interactive screen, a finger trace tracking unit, an electrostatic force touch representation controller, a signal driving unit and a PC (Personal Computer). The finger trace tracking unit detects a finger position, and maps a touch force representation method of a visual object at the position; an electric signal parameter for representing a touch force is generated according to the corresponding relation between an electric signal and the touch force; a driving signal is output; the driving signal is amplified; and the amplified driving signal acts on the electrostatic force touch representation interactive screen to cause skin deformation of a finger so as to sense an absorption force and a repelling force, thereby realizing touch representation. The touch representation device has the advantages of low cost, high flexibility and strong applicability, and can realize the touch representation function on a small mobile terminal.

A method using optical coherence tomography to capture the microvascular network of the superficial layer of the finger skin for the purpose of fingerprint authentication and liveness detection. At the dermal papilla region, the vascular pattern follows the same pattern of the fingerprint and this vascular pattern forms a live vascular fingerprint. This live vascular fingerprint provides for ultrahigh security and a unique way for fingerprint-based personal verification. Because the system is based on blood flow, which only exists in a living person, the technique is robust against spoof attaching. After performing non-contact in-vivo imaging of a human fingertip, a three dimensional vasculature image is reconstructed from a plurality of vasculature tomography images and at least one vasculature fingerprint image which corresponds to the fingertip is extracted from the three dimensional vasculature image. This extracted image may then be compared to known fingerprint database for authentication or for liveness detection.

A fingerprint sensing device that measures the capacitance between an array of electrode plates and finger skin using pulse processing, in which pulse width rather than voltage level, is used for capacitance measurement and digital signal conversion. A pulse, the width of which is compared and adjusted with that of a reference pulse, is generated when voltage at sensing electrodes in discharging is compared with a reference voltage. The comparison results are then digitalized in a grade image sensor or output directly in a binary image sensor. The sensor can communicate with a CPU using serial communication, parallel communication, or memory map scheme. Since no A / D is used, there is no extra time and hardware cost for the conversion from analog signals to digital signals. Due to the pulse processing nature, the circuits can be configured insensitive to the change or fluctuation in voltage supply. This feature enables the sensing device work with a variety of voltages, and thus it can be better used in portable, battery powered or passive devices.

An embodiment of the invention relates to the technical field of electrons and discloses a flashlight adjusting method. The method includes: acquiring an image captured by a camera; acquiring a figure skin color from the image; according to the finger skin color, adjusting optical parameters of a flashlight so as to modify the figure skin color in the image. By implementation of the method, the figure skin color in the image can be modified by adjusting the optical parameters of the flashlight so as to beautify the shot image.

The invention provides an optical fingerprint imaging device and a display, relates to the technical field of display, and is used for solving the technical problem that natural light interferes withreflected light formed when a fingerprint image sensor identifies finger epidermis. The optical fingerprint imaging device comprises a display module, an optical conversion module and a fingerprint recognition layer which are arranged in a stacked mode. The display module comprises a cover plate and an OLED layer. Light emitted by the OLED layer is reflected by finger skin covering the surface ofthe cover plate to form reflected light containing fingerprint information. The reflected light is received by the fingerprint identification layer after passing through the display module and the optical conversion module in sequence to form a fingerprint image. The display module further comprises a first polaroid located between the cover plate and the OLED layer and a second polaroid located between the cover plate and the OLED layer. The optical conversion module comprises a second polaroid. The second polarizer is provided with a through hole area, and the through hole area corresponds to the fingerprint identification layer.

The invention relates to a finger and palm print instrument used for collection of soaked finger and palm prints. The finger and palm print instrument comprises a light source, a prism and a reception system. The reception system includes a lens and an image receiver. And the prism consists of a light incidence plane, an image output plane and a collection plane. Light emitted by the light sourceenters the prism through the light incidence plane and irradiates on the collection plane where a palm print and the prism are contacted so as to carry out scattering; parts of scattered light is emitted by the image output plane and then is imaged on the image receiver through the lens; besides, an included angle A between a trajectory L1 of a light and a collection plane normal L2 is greater than a critical angle B1 that is formed by emission of the light from a glass medium into water as well as is less than a critical angle B2 that is formed by emission of the light from a glass medium toa finger skin and grease mixing medium, wherein the light enters the lens and is superposed with an optical axis of the lens as well as is transmitted in the prism and is intersected with the collection plane. According to the invention, on the premise that there is no image detail loss, a problem of imaging blurring of a finger and a palm on the moist and soaking conditions can be effectively solved.

A fingerprint sensing device that measures the capacitance between an array of electrode plates and finger skin using pulse processing, in which pulse width rather than voltage level, is used for capacitance measurement and digital signal conversion. A pulse, the width of which is compared and adjusted with that of a reference pulse, is generated when voltage at sensing electrodes in discharging is compared with a reference voltage. The comparison results are then digitalized in a grade image sensor or output directly in a binary image sensor. The sensor can communicate with a CPU using serial communication, parallel communication, or memory map scheme. Since no A / D is used, there is no extra time and hardware cost for the conversion from analog signals to digital signals. Due to the pulse processing nature, the circuits can be configured insensitive to the change or fluctuation in voltage supply. This feature enables the sensing device work with a variety of voltages, and thus it can be better used in portable, battery powered or passive devices.

The invention provides intelligent-monitoring ring-type wearable equipment. The intelligent-monitoring ring-type wearable equipment comprises an intelligent terminal and a ring, wherein the internal wall, facing to finger skin, of the ring is provided with a near-infrared light source, a photoelectric conversion module, a miniature spectrograph, a microprocessor, an APP data conversion module and a first wireless signal transceiving module as well as a power supplying module, the APP data conversion module and a wireless signal transmitting module, and the intelligent terminal is provided with a second wireless signal transceiving module, an APP data analysis module and an APP health database. According to the intelligent-monitoring ring-type wearable equipment, detection equipment matched with a dynamic spectrum based noninvasive blood component detection technique is arranged in the ring; on one hand, real-time and sustained monitoring on human body monitoring data such as human body hemoglobin, serum cholesterol and blood sugar concentration is realized on the ring; the habit of wearing the ring is to press on a finger, so that the accuracy of detection can be improved; on the other hand, intelligent, noninvasive, real-time and sustained monitoring of human body blood is achieved. Meanwhile, SOS first-aid appeal, body temperature detection and positioning monitoring can also be achieved.

The invention relates to a finger ring structure which comprises a finger ring. The finger ring at least comprises an outer layer and an inner layer which comes into contact with a finger, wherein the inner layer is of a bulged arc shape, a cavity is formed between the outer layer and the inner layer, and the inner layer is provided with a hollowed pattern. The ring belt of the inner layer comprises a first ring belt and a second ring belt in types, wherein hollowly embedded characters or patterns are arranged on the first ring belt, and a hollowed pattern is arranged on the second ring belt. The diameter of the inner layer is of the structure with two large sides and a small middle, and air flows are formed on both sides of the finger ring by utilizing the characteristics of two small sides and large middle of the arc shape; and the air flows flow into the cavity of the finger ring through the hollowed pattern on one side of the inner layer of the finger ring and then flow out of the hollowed pattern on the other side of the inner layer of the finger ring. When the finger ring is worn, the contact area between the inner layer of the finger ring and finger skin is greatly decreased so that the integral air permeability of the finger ring is revolutionarily improved; after the finger ring is worn for a long term, no white circular ring and ring mark appear on the finger; and the wearing comfortableness of the finger ring is qualitatively improved.

The invention provides a secondary-generation fingerprint identification method, aiming at overcoming the state that the existing optical fingerprint identification system can only scan the surface of finger skin or scan the dead skin layer, instead of penetrating into the dermal layer because light can not penetrate the surface of the skin (dead skin layer). The method realizes the accuracy of the process of the optical fingerprint identification method.

A wearable biometric sensing ring apparatus for continuous heart rate and blood pressure monitoring having a ring housing for retention on a finger of a user, an electrodermal activity (EDA) sensor disposed within the housing so as to contact a location of the skin of the finger when the housing is retained on the finger, the EDA sensor configured for measuring changes in skin impedance indicative of SNS activation; a biometric sensor disposed within the housing in proximity to the EDA sensor so as to contact at or near the location of the skin of the finger. Application software is provided for assessing the physiological state of the user based on acquired EDA sensor data and biometric sensor data.

A method for parameter estimation of a human skin-electrode bioelectrical impedance model based on an electrical tactile device is provided. The method is characterized in that: the recursive algorithm with forgetting factor is used, and the data is weighted with the default forgetting factor, so that the new data occupies a greater weight in the parameter estimation; the new input and output dataprovided by the electrical tactile device are used to improve the estimation accuracy, and when the parameters are changed, the estimation is modified to realize online real-time estimation of the parameters; and at the same time, the augmented model is adopted, and the error between the electrical stimulus amount output by the complete and reasonable hypothesis model and the real finger electrical stimulus amount is colored noise, but not the ideal white noise, so that the result is more in line with the actual situation and can adapt to parameter estimation in different noise conditions. The method provided by the present invention avoids the decrease of the parameter correction ability and the interference of the single noise model to the parameter estimation after the recursive step is prolonged, and improves the instantaneity and the accuracy of the finger skin impedance parameter estimation; and the method provided by the present invention is thoughtful, simple and reasonable indesign, easy to implement, and strongly adaptable.

The invention belongs to the field of man-machine interaction and relates to a finger-pad-applying electrostatic force and vibration integrated tactile representation device and method. The device comprises a positioning unit, a tactile processing unit and a finger pad unit. The tactile representation method includes that the positioning unit acquires position information of a finger pad on a multimedia terminal screen in real time; the tactile processing unit processes the position information of the finger pad, generates electrostatic force driving signal amplitude parameters and vibration driving signal amplitude parameters and transmits to the finger pad unit wirelessly; the finger pad unit inputs generated electrostatic force driving signals and vibration driving signals into an electrostatic screen and a vibration source to generate electrostatic force and vibration respectively, and thus, finger skin deforms to make fingers of a user sense tactile feedback. The device and the method have advantages that in a planar interaction process, tangential feedback force and normal feedback force applied to fingers can be changed at the same time, and accordingly real tactile sense can be achieved, and high portability and multi-point tactile feedback can be realized.

The present invention discloses a multi-functional bionic finger capable of detecting a three-dimensional force. The multi-functional bionic finger comprises a phalanx; the front section of the phalanx is wrapped by finger skin, and a cavity is formed inside the front section of the phalanx; the rear section of the phalanx is wrapped by a protective shell; a channel is installed inside the phalanx; the channel and the cavity are filled with a filling medium; the channel is connected with one end of a pressure sensor; the other end of the pressure sensor is connected with a signal processing circuit; the upper end of the signal processing circuit is connected with an external communication circuit; the lower end of the signal processing circuit is connected with a sensitive component signal transmission circuit; the front section of the sensitive component signal transmission circuit is provided with an electrode and a temperature sensitive component; and the outer portion of the finger skin is provided with bionic lines. The bionic finger of the invention can simultaneously sense environmental information such as temperature, micro vibration and a three-dimensional force and can acquire the physical characteristics such as shape and stressed state, of a target object. The multi-functional bionic finger is of great significance to the realization of stable and controllable grasp of objects for a robot and the improvement of the operating dexterity of the robot.

A method using optical coherence tomography to capture the microvascular network of the superficial layer of the finger skin for the purpose of fingerprint authentication and liveness detection. At the dermal papilla region, the vascular pattern follows the same pattern of the fingerprint and this vascular pattern forms a live vascular fingerprint. This live vascular fingerprint provides for ultrahigh security and a unique way for fingerprint-based personal verification. Because the system is based on blood flow, which only exists in a living person, the technique is robust against spoof attaching. After performing non-contact in-vivo imaging of a human fingertip, a three dimensional vasculature image is reconstructed from a plurality of vasculature tomography images and at least one vasculature fingerprint image which corresponds to the fingertip is extracted from the three dimensional vasculature image. This extracted image may then be compared to known fingerprint database for authentication or for liveness detection.

The invention discloses a screen-space-based method for simulating the real skin of a figure through sub-surface scattering. The method mainly includes the steps of conducting filtration and screening on a finger skin object to be rendered and other objects in a scene; rendering the skin of the figure first time to obtain Alpha mixing to obtain a mixed image; rendering the scene second time to obtain a semi-transparent effect image for a thinner part of the skin; stacking the semi-transparent image with the mixed image to obtain a final rendering effect image. By means of the screen-space-based method for simulating the real skin of the figure through sub-surface scattering, the shortcomings that in the prior art, the rendering difficulty is large, the drawing accuracy is poor and the image effect is untruthful can be overcome; the screen-space-based method has the advantages of being small in rendering difficulty, good in drawing accuracy and real in image effect.

The invention discloses an intelligent fingerprint combination lock, which comprises a functional display screen, a digital combination keyboard, a magnetic card sensing unit, a lock core, a covering plate, a handle, a fingerprint image acquisition sensing unit, an A / D conversion unit, an infrared sensor, a memory, Power supply unit, single chip microcomputer, recognizer, sound and light alarm unit, direct drive motor mechanism and door opening execution unit. The present invention is equipped with an optical fingerprint image acquisition unit, which can quickly pass through the surface of the finger and the dead skin layer to reach the living body of the finger skin, directly read the fingerprint cluster, and effectively improve the safety of the system; the direct drive motor mechanism is provided High-speed operation can effectively avoid failures caused by friction loss during unlocking, effectively prevent interference, and have a long service life; the 360° idling lock cylinder has anti-theft and anti-violence functions, which greatly improves the safety of use; there is a password , fingerprint, password plus fingerprint, card swiping, mechanical unlocking and other multiple unlocking methods.

The invention discloses an inter-finger skin burn rehabilitation limiter, which is characterized by comprising a wrist fixing band, a hand back fixing plate, a water inlet, a hinge shaft, a first knuckle fixing plate, a second knuckle fixing plate, a multi-knuckle rotating shaft, finger sleeves, a limiting rod connecting base, a limiting rod and a water injection channel. According to the inter-finger skin burn rehabilitation limiter in the invention, a burnt finger can be effectively limited and fixed under the condition that secondary injury is not caused to an affected part; furthermore, finger rehabilitation exercise also can be carried out in the limiting and fixing process; burnt skin is subjected to water cooling; and the function of accelerating healing of the damaged skin is achieved.

The invention discloses a fingerprint unlocking device capable of being not affected by the skin dryness. The fingerprint unlocking device comprises a fingerprint identification module (1) and a miniature humidifier (3), and a humidity sensor (2) and the miniature humidifier (3) are located around the fingerprint identification module (1). According to the fingerprint unlocking device capable of being not affected by the skin dryness, fingerprint identification is not easily affected no matter whether the finger skin of people is dry or not, thus the sensitivity of fingerprint identification is improved, the work and life quality of people is ensured, wide application and promotion of the fingerprint unlocking device are facilitated, and the fingerprint unlocking device has great production practical significance.

The invention discloses an ointment applicator, which comprises a bottle body and a bottle cap, wherein, the upper part of the bottle body is provided with a drug storage bin base, the upper part of the drug storage bin base is provided with a drug storage bin, and the drug storage bin is further socketed There is a cotton ball cover, the base of the medicine storage compartment is threadedly connected with the bottle body, and the bottle cap is fastened and connected with the base of the medicine storage compartment. A drug outlet is provided on one side of the drug storage bin, and the drug storage bin, the drug outlet and the base of the drug storage bin are integrally formed during manufacture. An arc-shaped groove is arranged on the drug storage compartment, and a drug outlet is arranged in the arc-shaped groove, and an elastic band is arranged on the cotton ball sleeve, and the cotton ball sleeve is sleeved in the arc-shaped groove. The cotton ball cover can be replaced at any time. A heating device is further added to the side of the medicine storage compartment. The invention is simple in structure and convenient to use, and can effectively prevent the user from applying the ointment with fingers, avoid the damage of the ointment to the skin of the user's fingers, and avoid cross-infection.

The invention discloses a clipping and polishing integrated electric nail clipper which comprises a shell, a motor installed in the shell and a clipping head connected to an output shaft of the motor. The clipping head is provided with a detachable protective sleeve. A polishing head is arranged at the top end of the protective sleeve. The clipping head for nail clipping and the polishing head for nail polishing are integrated, the clipping head is driven by the motor, the torque and power of the motor are appropriate, and the clipping power is sufficient. During nail clipping, finger skin and flesh are isolated from the finger nails through the protective sleeve, and the clipping head is prevented from clipping the skin and flesh. The clipping and polishing integrated electric nail clipper is convenient to use and operate, safer and more efficient in clipping, and simple and practical in structure, the shape and radian of the clipping head are in perfect fit with those of the finger nails, the finger nails shaped after clipping are relatively smooth and attractive, no clipping blind area is likely to be left over, and the clipping effect is better.

The invention belongs to the technical field of medical apparatuses, and discloses a skin disinfection effect monitoring quick sampling device. The skin disinfection effect monitoring quick sampling device is of a cuboid structure, a portable handle and a control switch are arranged on an upper cover of a cuboid, an automatic door is arranged in the front of the cuboid, and a sampler baseboard isarranged on the bottom face of the cuboid; the sampler baseboard is provided with a receiving pond, a finger groove, a membrane groove, a control box, a chargeable battery and supporting plates; two supporting plates are arranged, a cross rod is in lap joint with the two supporting plates and is provided with a sampling head, and the two supporting plates are provided with ultraviolet lamps respectively. With 'a set time, set pressure and set area' of sampling being a basic principle in combination with a related automated technology, a semi-automated finger skin quick sampler which is convenient, accurate and quick to sample, is designed, and a basis is provided for changing a skin disinfection effect quick detecting method.

The invention discloses a fingerprint identification display device, a manufacturing method and a driving method thereof. A plurality of photosensitive units are arranged inside the display device, and each photosensitive unit includes: a photosensitive unit for sensing changes in light intensity when a fingerprint is pressed. Diodes, and control switch transistors used to control the photodiode to convert light intensity changes into different potential outputs; the display device also has a component that emits light that can be sensed by the photodiode. When the user's finger is close to the surface of the display device, due to the uneven ridges and valleys on the skin surface of the finger, the photodiode emitted by the display device can sense the light intensity of the light irradiated on the ridges and valleys of the finger and reflected to the photodiode of the photosensitive unit Differently, the light intensity difference is converted into the current signal difference to realize the fingerprint detection. The photosensitive unit detects the fingerprint based on the photosensitive effect, which is not easy to interfere with the internal components of the display device, and it is easy to realize high-quality fingerprint detection.

The invention discloses a human-body dry-wet tester which is constructed by the mutual connection between a sensor, a processor, a database, a memorizer, a display, a matching resistance and a container. The dry-wet tester is characterized by the sensor of a human-body finger-skin-contact tester. The sensor of the tester receives information about the human-body finger skin and transmits the information about dryness, wetness, acidity and alkalinity to the processor, the processor analyzes the data about the dryness, the wetness, the acidity and the alkalinity, i.e., the percentages of the dryness, the wetness, the acidity and the alkalinity, and then gives out the percentages of the dryness, the wetness, the acidity and the alkalinity of the human body. The human-body dry-wet tester has the advantages that a user can know whether the body thereof belongs to dry or wet type and acid or alkali type, and know about the data about the percentages of the dryness, the wetness, the acidity and the alkalinity of a normal human body (meeting national standards).

A method for parameter estimation of a human skin-electrode bioelectrical impedance model based on an electrical tactile device is provided. The method is characterized in that: the recursive algorithm with forgetting factor is used, and the data is weighted with the default forgetting factor, so that the new data occupies a greater weight in the parameter estimation; the new input and output dataprovided by the electrical tactile device are used to improve the estimation accuracy, and when the parameters are changed, the estimation is modified to realize online real-time estimation of the parameters; and at the same time, the augmented model is adopted, and the error between the electrical stimulus amount output by the complete and reasonable hypothesis model and the real finger electrical stimulus amount is colored noise, but not the ideal white noise, so that the result is more in line with the actual situation and can adapt to parameter estimation in different noise conditions. The method provided by the present invention avoids the decrease of the parameter correction ability and the interference of the single noise model to the parameter estimation after the recursive step is prolonged, and improves the instantaneity and the accuracy of the finger skin impedance parameter estimation; and the method provided by the present invention is thoughtful, simple and reasonable indesign, easy to implement, and strongly adaptable.

A coating applied to substrates such as papers and films yields a haptic sensation of skin, leather, velvety fabric or soft elastomers. Commonly referred to as a ‘soft touch’ coating, it retains the desired haptic appeal after being over-printed by various imaging ink systems. Improved haptic sensations are provided by expandable microspheres that impart a surface topography that is measured in micron and sub-micron undulations that align with the texture of the human finger skin. Non-skid behavior arises from the surface topography having enough undulations of such fine frequency that air is evacuated between the coating and any substantially smooth surface that a strong attraction is caused by a temporary vacuum when the coating is pressed against smooth surfaces.

The invention discloses a fingerprint authenticity identification device. The device comprises a touch panel in contact with a finger, a detecting device, a memory and a processor, wherein the detecting device, the memory and the processor are arranged under the touch panel. The detecting device comprises an ultrasonic probe array used for detecting the thickness of the finger skin and blood flow,and an infrared sensor which is arranged in the middle of the ultrasonic probe array to detect the temperature of the finger. The ultrasonic probe array, the infrared sensor and the memory are connected with the processor respectively. According to the invention, the temperature of the finger skin is detected by the infrared sensor, so as to discriminate whether the finger is of a living body; the thickness of the finger skin is detected by the ultrasonic probe array, so as to discriminate the authenticity of the fingerprint; theft of the finger of another person is prevented; the blood flowis detected, which can also identify whether the finger is not of a living body; through multi-point detection and various detection methods, the detection accuracy is improved; the device is furtherprovided with a data transmission device; and when a counterfeit fingerprint is detected, a signal is transmitted to a host computer to notify a monitoring person.

The invention relates to a finger ring structure which comprises a finger ring. The finger ring at least comprises an outer layer and an inner layer which comes into contact with a finger, wherein the inner layer is of a bulged arc shape, a cavity is formed between the outer layer and the inner layer, and the inner layer is provided with a hollowed pattern. The ring belt of the inner layer comprises a first ring belt and a second ring belt in types, wherein hollowly embedded characters or patterns are arranged on the first ring belt, and a hollowed pattern is arranged on the second ring belt.The diameter of the inner layer is of the structure with two large sides and a small middle, and air flows are formed on both sides of the finger ring by utilizing the characteristics of two small sides and large middle of the arc shape; and the air flows flow into the cavity of the finger ring through the hollowed pattern on one side of the inner layer of the finger ring and then flow out of thehollowed pattern on the other side of the inner layer of the finger ring. When the finger ring is worn, the contact area between the inner layer of the finger ring and finger skin is greatly decreased so that the integral air permeability of the finger ring is revolutionarily improved; after the finger ring is worn for a long term, no white circular ring and ring mark appear on the finger; and the wearing comfortableness of the finger ring is qualitatively improved.

The invention relates to a five-finger work glove with guaranteed space, which is characterized by comprising: cutting a thumb hole under the palm skin, forming a finger end at the upper end, and extending to the finger end so that the front index finger and the back index finger form a whole, and the side surface of the back index finger forms a whole. The palm skin that forms the suture end; the back middle finger, the back ring finger, and the back little finger form a whole, the back middle finger side forms a suture end, and the back of the palm skin is stitched with the suture end of the back index finger side; the front middle finger, front ring finger, and front little finger form a whole, The finger skin sutured to the finger end of the palm skin above; the thumb skin sutured to the thumb hole of the palm skin. This kind of five-finger work gloves, the number of fingers of the whole plate finger skin has been increased from 2 to 3, cut and sewn into various shapes, and made by moving the stitching points between the fingers on the back to ensure the extra space between the fingers and the movement of the fingers The flexibility of the machine eliminates the connection on the back, which solves the phenomenon of squatting and helps to improve work efficiency.