Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described more fully below by way of examples in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In one embodiment, referring to fig. 1, a cold and hot rf deep warmer is provided, which includes a control device 102, an rf generating device 104, an rf electrode 106 and a skin detecting device 108, wherein the rf generating device 104 is connected to the rf electrode 106, the skin detecting device 108 is disposed on the rf electrode 106, the skin detecting device 108 is connected to the control device 102, and the control device 102 is connected to the rf generating device 104. The skin detection device 108 is used for detecting the contact area of the radio frequency electrode 106 and a receiving object to generate area information and sending the area information to the control device 102, when the value of the received area information is larger than or equal to a preset area value, the control device 102 controls the radio frequency generation device 104 to generate radio frequency current, the radio frequency current is transmitted to the radio frequency electrode 106 and acts on the receiving object through the radio frequency electrode 106, water molecules in tissues are instantly vibrated and vaporized under the action of electric waves due to the fact that impedance of the receiving object absorbs the electric waves, a large amount of heat is generated to promote lipolysis, subcutaneous collagen is contracted and tensioned to play a role of fat elimination and beauty treatment, the radio frequency current is acted on the receiving object after the radio frequency electrode 106 is detected to be in full contact with the receiving object, the situation that a radio frequency treatment probe is not connected to a human body, radio frequency energy, the safety and reliability of the cold and hot radio frequency deep warming instrument are improved.
Specifically, the control device 102 is a control center of the cold and hot radio frequency deep temperature thermal instrument, and performs data transmission with each device connected to the control device 102, thereby implementing a corresponding control function. The rf generator 104 is used for generating rf current according to the control signal sent by the controller 102 and transmitting the rf current to the rf electrode 106, and is also used for adjusting rf output energy. The type of rf generating device 104 is not exclusive and, for example, an rf signal generator may be used, which may perform frequency synthesis, amplification of low-end frequency signals, vector modulation, amplitude control, pulse modulation, filtering, etc. to generate rf current.
The RF electrode 106 may be a monopolar RF electrode 106 or a bipolar RF electrode 106, and the monopolar RF electrode is used in conjunction with the negative plate, so that the energy released from the electrode treatment tip flows through the tissue of the recipient to perform a deep treatment. The bipolar RF electrode 106 heats cells by passing current from one electrode to another, is directed to the skin tissue, and is not susceptible to radiation leakage.
The skin detection device 108 is used for detecting the contact area of the radio frequency electrode 106 and the receiving object to generate area information and sending the area information to the control device 102, and the control device 102 controls the radio frequency generation device 104 to generate radio frequency current when the value of the received area information is larger than or equal to a preset area value. Whether the radio-frequency electrode 106 is in sufficient contact with the receiving object can be judged according to the detection result of the skin detection device 108, when the detected contact area between the radio-frequency electrode 106 and the receiving object is larger than or equal to the preset area value, the radio-frequency electrode 106 is considered to be in sufficient contact with the receiving object, and at the moment, the control device 102 controls the radio-frequency generation device 104 to generate radio-frequency current to the radio-frequency electrode 106, so that the safety of the cold and hot radio-frequency deep warmer is improved. The predetermined area value is not exclusive and may be, for example, a predetermined effective active area of the rf electrode 106, and it is understood that in other embodiments, the predetermined area value may be an empirical value of the effective active area determined experimentally. The structure of the skin detection device 108 is not unique, and taking a skin detection sensor as an example, the skin detection sensor can convert the detected area information into an electric signal and send the electric signal to the control device 102, so that the reflection is sensitive and the detection is reliable. When the skin detection device 108 detects that the contact area of the radio-frequency electrode 106 and the receiving object is smaller than the preset area value, the radio-frequency electrode 106 is considered not to be in full contact with the receiving object, at this time, the radio-frequency generation device 104 does not work, and the cold and hot radio-frequency deep warmer is not started. In addition, in the working process of the cold and hot radio frequency deep warming instrument, the skin detection device 108 continuously detects or detects the contact area between the radio frequency electrode 106 and the receiving object according to the preset time interval and sends the contact area to the control device 102, when the contact area is smaller than the preset area value, the radio frequency electrode 106 is considered to be separated from the receiving object, the control device 102 controls the radio frequency generation device 104 to stop working, the radio frequency output is stopped, and when the contact area is larger than or equal to the preset area, the radio frequency energy is output again, so that the automation degree of the cold and hot radio frequency deep warming instrument is improved, and the electric shock risk caused by the fact that the radio frequency electrode 106 is separated from the.
In one embodiment, referring to fig. 2, the cold and hot rf deep warmer further includes a temperature detecting device 110 and a cooling device 112, the temperature detecting device 110 is disposed on the rf electrode 106, the temperature detecting device 110 is connected to the control device 102, the control device 102 is connected to the cooling device 112, and the cooling device 112 is disposed on the rf electrode 106. The temperature detecting device 110 is configured to detect a temperature of the rf electrode 106 to generate a temperature feedback signal and send the temperature feedback signal to the control device 102, and the control device 102 controls the cooling device 112 to operate when a value of the received temperature feedback signal is greater than a temperature threshold value, so as to reduce the temperature of the rf electrode 106.
Specifically, the structure of the temperature detecting device 110 is not exclusive, and may include, for example, a sensor disposed on the rf electrode 106 and connected to the converting circuit, a converting circuit connected to the feedback circuit, and a feedback circuit connected to the control device 102. The sensor collects the temperature of the radio-frequency electrode 106 and sends the temperature to the conversion circuit, the conversion circuit converts the received temperature information into an electric signal and sends the electric signal to the feedback circuit, the feedback circuit feeds the electric signal back to the control device 102, and the control device 102 controls the refrigeration device 112 to work according to the temperature of the radio-frequency electrode 106 so as to reduce the temperature of the radio-frequency electrode 106. The temperature threshold is a preset temperature value, and can be specifically adjusted according to actual requirements. When the received temperature feedback signal value is greater than the temperature threshold value, the control device 102 determines that the temperature of the rf electrode 106 is too high, and sends a control signal to the refrigeration device 112 to control the refrigeration device 112 to refrigerate so as to reduce the temperature of the rf electrode 106. The sensor can also be used for acquiring the temperature of a receiving object in contact with the radio frequency electrode 106, the temperature of the receiving object is acquired and then is sent to the control device 102 through the conversion circuit and the feedback circuit, when the temperature feedback signal value received by the control device 102 is greater than the temperature threshold value, the temperature of the receiving object is considered to be too high, at the moment, a control signal is sent to the refrigerating device 112, the refrigerating device 112 is controlled to refrigerate, so that the temperature of the radio frequency electrode 106 is reduced, the temperature of the receiving object is reduced, the control device 102 can also control the radio frequency generating device 104 to reduce the intensity of generated radio frequency current, so that the temperature of the radio frequency electrode 106 is reduced, the effect of reducing the temperature of the receiving object is. The number and the arrangement positions of the temperature detection devices 110 may also be adjusted according to actual requirements, for example, the temperature detection devices 110 may also be arranged in the refrigeration device 112, and configured to detect the temperature of the refrigeration device 112 and send the detected temperature to the control device 102, and the control device 102 may reduce the temperature of the rf electrode 106 by controlling the rf generation device 104 to reduce the intensity of the generated rf current when the temperature of the refrigeration device 112 is too high, so as to reduce the working intensity of the refrigeration device 112, and achieve the effect of prolonging the service life of the refrigeration device 112. When the number of the temperature detection devices 110 is multiple, the number of the sensors is multiple, and the sensors are respectively arranged on each device needing to detect the temperature, so that the device is convenient to set and sensitive in detection.
The refrigeration device 112 is disposed on the rf electrode 106 and connected to the control device 102, and is configured to operate according to a control signal sent by the control device 102 to reduce the temperature of the rf electrode 106, and the refrigeration device 112 is not unique in structure and may include an electrode cooling plate, for example, the electrode cooling plate is disposed on the rf electrode 106 and connected to the control device 102. The electrode refrigeration piece works based on the Peltier effect, generally is a semiconductor refrigeration piece, and comprises a cold surface and a hot surface. In this embodiment, the cold side of the electrode cooling plate contacts the rf electrode 106, which can reduce the temperature of the rf electrode 106. The electrode refrigeration piece is connected with the control device 102, when the received temperature feedback signal value is larger than the temperature threshold value, the control device 102 considers that the temperature of the radio-frequency electrode 106 is too high, generates a refrigeration control signal to control the electrode refrigeration piece to work, so that the temperature of the radio-frequency electrode 106 is reduced to reach a preset temperature, the temperature of the radio-frequency electrode 106 is monitored and controlled in real time, and the working performance of the cold and hot radio-frequency deep portion warming instrument is improved. The electrode refrigeration piece serving as the refrigeration device 112 can effectively reduce the temperature of the radio-frequency electrode 106, is simple in structure, and is beneficial to saving the use cost of the cold and hot radio-frequency deep warming instrument. In an expanded manner, the cooling device 112 may further include a heat dissipation device for reducing the temperature of the electrode cooling plate, such as a water-cooling circulation device, to take away the heat generated by the electrode cooling plate during operation through the circulating cooling water, so as to reduce the temperature of the electrode cooling plate and improve the cooling effect of the electrode cooling plate. It is understood that in other embodiments, the refrigeration device 112 may be a device with other structures, as long as the implementation is considered by those skilled in the art.
In one embodiment, referring to fig. 2, the cold-hot rf deep warmer further includes a path detection device 114, the path detection device 114 is disposed on the rf electrode 106 and connected to the control device 102, the path detection device 114 is configured to detect a moving track of the rf electrode 106 and generate a path signal to be sent to the control device 102, and the control device 102 controls the rf generation device 104 to stop working when a similarity between the received path signal and the preset path signal is smaller than a preset threshold.
Specifically, the structure of the path detection device 114 is not unique, and may include, for example, an acceleration sensor, a gyroscope, and a data converter, where the acceleration sensor and the gyroscope are connected to the data converter, the acceleration sensor is used to detect acceleration signals of the radio frequency electrode 106 in various directions, the gyroscope may detect an angular velocity signal during the movement of the radio frequency electrode 106, the data converter converts received acceleration information of the radio frequency electrode 106 sent by the acceleration sensor and received angular velocity information of the radio frequency electrode 106 sent by the gyroscope into an electrical signal to generate a path signal, and sends the path signal to the control device 102, and the control device 102 may calculate the movement track of the radio frequency electrode 106 according to the received path signal, so as to obtain the movement track of the radio frequency electrode 106. The control device 102 compares the similarity between the received path signal and the preset path signal, and when the similarity between the received path signal and the preset path signal is smaller than a preset threshold, the control device 102 determines that the movement track of the radio frequency electrode 106 is incorrect, and at this time, the control device 102 controls the radio frequency generating device 104 to stop working, so as to stop generating the radio frequency current, thereby avoiding adverse effects on a receiving object caused by incorrect manipulation of using the radio frequency electrode 106. When the cold and hot radio frequency deep warmer is used, the path detection device 114 continuously detects the moving track of the radio frequency electrode 106 and generates a path signal to be sent to the control device 102, when the similarity between the received path signal and the preset path signal is greater than or equal to the preset threshold value, the control device 102 considers that the matching degree between the current moving track of the radio frequency electrode 106 and the preset path is greater, the moving track of the radio frequency electrode 106 is correct, and at the moment, the control device 102 controls the radio frequency generation device 104 to continuously work to continuously generate radio frequency current. The path detection device 114 can detect the moving track of the radio frequency electrode 106 in real time and generate a path signal to be sent to the control device 102, and the control device 102 controls the radio frequency generation device 104 to stop working when the similarity between the received path signal and the preset path signal is smaller than a preset threshold value, so that the cold and hot radio frequency deep warming instrument stops working in time if the moving track of the radio frequency electrode 106 is wrong in the working process, adverse effects on a receiving object caused by the wrong moving track of the radio frequency electrode 106 are avoided, the working performance of the cold and hot radio frequency deep warming instrument is improved, and the problem of multiple treatments on the receiving object caused by the fact that an operator is unfamiliar with equipment and the like is solved.
In one embodiment, the rf electrodes 106 include a large probe rf electrode, a small probe rf electrode, and a facial probe rf electrode, all connected to the rf generating device 104.
Specifically, according to the difference in shape and size of the rf electrode 106, the rf electrode 106 may include a large probe rf electrode, a small probe rf electrode, and a facial probe rf electrode, the large probe rf electrode is mainly used in a large area such as abdomen, and can perform deep fat reduction, for example, reduce visceral fat, the small probe rf electrode is mainly used in subcutaneous fat reduction, for example, reduce fat at the positions such as arms, and the facial probe rf electrode is mainly used on the skin surface, for example, can act on the face, eliminate redundant fat on the face, and achieve the effects of removing wrinkles and tightening the skin. When the radio-frequency electrode 106 comprises a large-probe radio-frequency electrode, a small-probe radio-frequency electrode and a face-probe radio-frequency electrode, the fat eliminating function can be realized on internal organs, arms, faces and the like through one cold and hot radio-frequency deep warming instrument, the application range of the cold and hot radio-frequency deep warming instrument is expanded, and the use reliability is improved. It is understood that in other embodiments, the rf electrode 106 may have other sizes or shapes, and the number of the rf electrodes 106 may be adjusted according to actual requirements, as long as the implementation is considered by those skilled in the art.
When the radio-frequency electrodes 106 include a plurality of radio-frequency electrodes 106 such as a large-probe radio-frequency electrode, a small-probe radio-frequency electrode, a facial-probe radio-frequency electrode, and the like, each radio-frequency electrode 106 is connected to the skin detection device 108, the skin detection device 108 detects the contact area between each radio-frequency electrode 106 and a receiving object to generate area information and sends the area information to the control device 102, the control device 102 controls the radio-frequency generation device 104 connected to the corresponding radio-frequency electrode 106 to generate radio-frequency current when the value of the received area information is greater than or equal to a preset area value, and the radio-frequency current is transmitted to the radio-frequency electrodes 106 and then applied to the receiving object, so as to reduce the risk that the receiving object is shocked. In addition, each rf electrode 106 is connected to the rf generating device 104, the temperature detecting device 110 and the cooling device 112, the temperature detecting device 110 detects the temperature of each rf electrode 106 to generate a temperature feedback signal and send the temperature feedback signal to the control device 102, and the control device 102 controls the cooling device 112 connected to each rf electrode 106 to operate when the received temperature feedback signal value is greater than the temperature threshold value, so as to reduce the temperature of each rf electrode 106. Further, according to the type of the rf electrode 106, the control device 102 may control the intensity of the rf current generated by the rf generating device 104 or control the cooling temperature of the cooling device 112 to enable different rf electrodes 106 to work in different temperature environments, so as to intelligently adjust the temperature of each rf electrode 106, thereby achieving a better fat reduction effect. Each radio frequency electrode 106 is connected with different radio frequency generating devices 104, and when the cold and hot radio frequency deep thermotherapy apparatus works, the control device 102 controls one of the radio frequency generating devices 104 to generate radio frequency current, so that the radio frequency current is applied to a receiving object through the corresponding radio frequency electrode 106. Each radio frequency electrode 106 is connected with the radio frequency generating device 104 through different fool-proof interfaces, so that abnormal access caused by manual misconnection can be effectively prevented. It can be understood that in other embodiments, different rf electrodes 106 may also be connected to the same rf generating device 104, and connected through different interfaces in the rf generating device 104, so as to meet the working requirements of each rf electrode 106, simplify the hardware structure of the cold and hot rf deep warmer, and save the production cost.
In one embodiment, the cold-hot radio frequency deep warmer further comprises a foot switch and a negative plate, both of which are connected to the radio frequency generating device 104, and the foot switch is connected to the control device 102. The foot switch can control the switching between the working state and the shutdown state of the radio frequency generating device 104, and the use is convenient. The foot switch is further connected with the control device 102, when the foot switch has a fault, the control device 102 controls the working state of the radio frequency generating device 104, and radio frequency output can be realized without the foot switch, so that normal operation of a radio frequency fat elimination state is ensured. The negative plate is connected with the radio frequency generating device 104, so that a safe return path can be provided for the radio frequency current generated by the radio frequency generating device 104, and the use safety of the cold and hot radio frequency deep warming instrument is improved.
In one embodiment, referring to fig. 2, the deep cooling and heating rf thermometer further includes an input device 116, the input device 116 is connected to the control device 102, the input device 116 is configured to send an operation signal to the control device 102, and the control device 102 controls the rf generating device 104 to generate the rf current according to the operation signal.
Specifically, the input device 116 receives an operation control signal input from the outside and feeds the operation control signal back to the control device 102, and the control device 102 controls the rf generating device 104 to generate the rf current according to the operation signal. The position where the input device 116 is disposed is not unique, for example, the input device 116 may be disposed on the control device 102 and configured to receive an operation command and send a received operation control signal to the control device 102, and the input device 116 may also be disposed on the rf electrode 106, so that when in use, the operation control signal is input through the input device 116 on the rf electrode 106, and the cold and hot rf deep warming instrument is disposed while being used, and is not required to be operated on a host of the cold and hot rf deep warming instrument, and is convenient and fast to use. The number of the input devices 116 is not unique, when the number of the input devices 116 is two, the two input devices 116 can be respectively arranged on the control device 102 and the radio frequency electrode 106, and can be adjusted according to actual requirements, when the device is used, a user can input a control instruction through the input device 116 at the control device 102, so that working parameters can be conveniently set before the device is started, and can also input a control instruction through the input device 116 at the radio frequency electrode 106, so that the user can conveniently input an operation instruction in the using process of the device, the working state of the device can be adjusted in real time, and the device is flexible to use and convenient to operate. The input device 116 is not limited to a touch screen or a button device, and the touch screen or the button device is connected to the control device 102, and the treatment parameters can be manually input through the touch screen or the button device to set and adjust the treatment plan. Alternatively, the input device 116 may be a communication device 122 having a communication function, the communication device 122 may serve as a control input interface, therapy parameters are manually input to a user terminal in communication connection with the communication device 122, the parameter information is transmitted to the communication device 122, the communication device 122 feeds the information back to the control device 102, and the control device 102 controls the corresponding device to operate according to the received parameter information, for example, controls the output current intensity of the radio frequency generation device 104, controls the temperature of the refrigeration device 112, or enables the cold and hot radio frequency deep warmer to play music, so as to perform auxiliary therapy. When the number of the radio frequency electrodes 106 is multiple, different working parameters can be set for different radio frequency electrodes 106 through the input device 116, and the working performance of the intelligent fat reducing device is optimized.
In one embodiment, referring to fig. 2, the deep cooling and heating radio frequency thermotherapy apparatus further includes a display device 118, the display device 118 is connected to the control device 102, and the control device 102 sends the area information to the display device 118 for displaying. The information displayed by the display device 118 can intuitively acquire the contact area between the radio-frequency electrode 106 and the receiving object, so that the working state of the cold and hot radio-frequency deep warming instrument can be monitored in real time.
Specifically, the specific type of the display device 118 is not exclusive, and may be, for example, a display screen, where the display screen may display the area information sent by the control device 102 in a form of a numerical value or a graph, and the user may visually obtain the information through the display screen. The display device 118 may also be a touch screen, where the touch screen includes a display screen and a touch screen, the display screen is used for displaying information, the touch screen can implement human-computer interaction, a worker can send an instruction through the touch screen, the touch screen sends the received instruction to the control device 102, and the control device 102 controls connected devices according to the received instruction. The display device 118 may further include a warning light, which is used to prompt the information through the color or flashing status of the warning light, and is low in cost and convenient to use. The display device 118 can display the area information, and can also display other information sent by the control device 102, such as the working time of the equipment, the temperature of the refrigerating device 112, and the like, so that the working state of the cold and hot radio frequency deep temperature heating instrument can be more comprehensively grasped by the staff.
In one embodiment, referring to fig. 2, the deep cooling and heating radio frequency instrument further includes an alarm device 120, the alarm device 120 is connected to the control device 102, the control device 102 sends an alarm signal to the alarm device 120 when the received area information is smaller than a preset area value, and the alarm device 120 outputs alarm information after receiving the alarm signal to remind a worker to process in time, so as to improve the reliability of the deep cooling and heating radio frequency instrument.
Specifically, the alarm device 120 is not unique in structure, and may include a warning light and a buzzer, for example, the warning light may implement the warning function by the color or the flashing state of the light, and the buzzer may implement the warning function by the warning sound, so as to remind the worker to handle in time, thereby improving the reliability of the cold and hot radio frequency deep temperature thermal instrument. When the value of the area information received by the control device 102 is smaller than the preset area value, it is considered that the radio frequency electrode 106 is not sufficiently contacted with the receiving object, at this time, the control device 102 sends alarm information to the alarm device 120, and the alarm device 120 realizes an alarm function through a structure such as a warning lamp or a buzzer, and plays a role of warning workers. The alarm information may be generated under other conditions besides that the value of the area information received by the control device 102 is smaller than the preset area value, for example, when the temperature of the radio frequency electrode 106 exceeds the preset temperature value, or the temperature of the refrigeration device 112 is higher than the preset refrigeration temperature value, or the operation duration of the cold and hot radio frequency deep warming instrument is longer than the preset duration, and the like, alarm information may be generated, and the alarm device 120 gives an alarm after receiving the alarm information, so that the working state of the cold and hot radio frequency deep warming instrument can be known timely and comprehensively by the working personnel, and the use reliability of the cold and hot radio frequency deep warming instrument can be improved.
In one embodiment, referring to fig. 2, the deep cooling and heating rf warmer further includes a communication device 122, and the communication device 122 is connected to the control device 102. Specifically, the structure of the communication device 122 is not unique, and may include a WIFI device and/or a bluetooth device, for example, the communication device 122 may establish a communication connection with a user terminal or a cloud platform, implement data transmission with a corresponding APP on the user terminal, or perform data exchange with the cloud platform. The interface type of the communication device 122 is not unique, and may be, for example, a UART, SPI, USB, WIFI, RF, or bluetooth interface, etc., and may be adjusted according to actual needs, and is flexible to use. Use the APP that corresponds on the user terminal as an example, communication device 122 sends the user treatment information that controlling means 102 sent to the user terminal, APP on the user terminal carries out information recording to these information, can also be according to user sign information, the length of treatment, the radio frequency gear, information such as refrigeration gear, predetermine treatment parameter, APP sends treatment parameter for communication device 122, after communication device 122 receives and analysis processes the information, send treatment parameter information to controlling means 102, set up or adjust the radio frequency by controlling means 102, refrigeration output, realize intelligent treatment, the problem that need manual adjustment gear among the treatment process has been solved, the reliability in use of the warm deep appearance of cold and hot radio frequency has been improved.
In one embodiment, referring to fig. 2, the deep cooling and heating rf warmer further includes a power supply device 124 connected to the rf generating device 104 and the control device 102. The power supply device 124 is used for supplying power to the rf generating device 104 according to the control signal of the control device 102, so that the rf generating device 104 works normally. The control device 102 may set the working time of the power supply device 124, so that the radio frequency generating device 104 is powered off and in a shutdown state after the working time reaches the set time, thereby achieving the purpose of automatically turning on and off the cold and hot radio frequency deep warming instrument, and improving the convenience of use of the cold and hot radio frequency deep warming instrument. The power supply device 124 is not unique in structure, and may be, for example, a storage battery, and the storage battery can store electric energy after being charged, so that the cold and hot radio frequency deep warming instrument can maintain normal operation even in a power-off environment, and the operational reliability of the cold and hot radio frequency deep warming instrument is improved.
In the cold and hot radio frequency deep warming instrument, the skin detection device 108 is used for detecting the contact area of the radio frequency electrode 106 and the receiving object to generate area information and sending the area information to the control device 102, when the value of the received area information is larger than or equal to the effective action area of the radio frequency electrode 106, the control device 102 considers that the radio frequency electrode 106 is in full contact with the receiving object at the moment, the radio frequency generation device 104 is controlled to generate radio frequency current which is transmitted to the radio frequency electrode 106 at the moment, the radio frequency electrode 106 applies the radio frequency current to the receiving object, water molecules in tissues are instantaneously vibrated and vaporized under the action of the radio wave due to the impedance absorption of the receiving object per se, a large amount of heat is generated to promote lipolysis, subcutaneous collagen is promoted to contract and tighten, the effects of fat removing and beautifying are achieved, the radio frequency current is applied to the receiving, the radio frequency treatment probe can be prevented from being not connected to a human body, radio frequency energy is output to cause a receiving object to be shocked, potential safety hazards are reduced, and the safety and reliability of the cold and hot radio frequency deep warming instrument are improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.