阅读说明：本技术 可收集能量的无线式超声波手术仪器 (Wireless ultrasonic surgical instrument capable of collecting energy ) 是由 金荣俊 李相敏 朴德男 金胜焕 崔淳镐 于 2020-07-16 设计创作，主要内容包括：本发明公开一种可收集能量的无线式超声波手术仪器。根据本实施例的一个方面,无线式超声波手术仪器包括：末端执行器,其直接接触于组织而能够对组织进行切开或缝合；手持机头,其具备至少一个以上的压电元件,以向末端执行器传递振动能；手用器械,其具备控制部,所述控制部控制末端执行器的动作,并控制是否要增加电源装置的电源；轴组装体,其与末端执行器连接,从手持机头接收振动能而进行旋转,并将基于旋转的振动能的一部分转换为电能而进行收集；以及电池,其向手持机头提供电源,以使手持机头将振动能传递给末端执行器,并将从轴组装体传送过来的电能进行充电。(The invention discloses a wireless ultrasonic surgical instrument capable of collecting energy. According to one aspect of the present embodiment, a wireless ultrasonic surgical instrument includes: an end effector that is directly contacted with a tissue and that can incise or staple the tissue; a handpiece including at least one piezoelectric element for transmitting vibration energy to the end effector; a hand instrument including a control unit that controls the operation of the end effector and controls whether or not to increase the power supply of the power supply device; a shaft assembly connected to the end effector, receiving vibration energy from the handpiece, rotating the handpiece, and converting a part of the vibration energy based on the rotation into electric energy to collect the electric energy; and a battery that supplies power to the handpiece head so that the handpiece head transmits vibration energy to the end effector and charges the electric energy transmitted from the shaft assembly.)

1. A wireless ultrasonic surgical instrument, comprising:

an end effector that is directly contacted with a tissue and that can incise or staple the tissue;

a handpiece including at least one piezoelectric element to deliver vibrational energy to the end effector;

a hand instrument including a control section that controls an operation of the end effector and controls whether or not to increase a power supply of a power supply device;

a shaft assembly connected to the end effector, receiving vibration energy from the handpiece, rotating the handpiece, and converting a part of the vibration energy based on the rotation into electric energy to be collected; and

a battery that supplies power to the handpiece so that the handpiece transmits vibration energy to the end effector and can be charged with electric energy transmitted from the shaft assembly,

the shaft assembly includes: a propagation rod which rotates under the action of the vibration energy transmitted from the hand-held handpiece; a charging sheet that converts a part of the vibration energy generated by the movement of the propagation rod into electric energy and collects the electric energy; and a pressurizing ring which is positioned between the charging sheet and the propagation rod and pressurizes the charging sheet to promote the generation of electric energy.

2. A wireless ultrasonic surgical instrument, comprising:

an end effector that is directly contacted with a tissue and that can incise or staple the tissue;

a handpiece including at least one piezoelectric element to deliver vibrational energy to the end effector;

a hand instrument including a control section that controls an operation of the end effector and controls whether or not to increase a power supply of a power supply device;

a shaft assembly connected to the end effector, receiving vibration energy from the handpiece, rotating the handpiece, and converting a part of the vibration energy based on the rotation into electric energy to be collected; and

a battery that supplies power to the handpiece so that the handpiece transmits vibration energy to the end effector and can be charged with electric energy transmitted from the shaft assembly,

the shaft assembly includes: a propagation rod which rotates due to the vibration energy transmitted from the handpiece; a charging sheet that converts a part of the vibration energy generated by the movement of the propagation rod into electric energy and collects the electric energy; and a pressing projection ring which is located between the charging sheet and the propagation rod and has a shape in which a plurality of rows of embossments forming grooves are protruded in order to press the charging sheet.

3. Wireless ultrasonic surgical instrument according to claim 1 or 2,

the charging tab is directly electrically connected to the battery to charge the collected electric energy directly into the battery.

Technical Field

The invention relates to a Wireless ultrasonic surgical Instrument (Wireless ultrasonic surgical Instrument with Energy Harvesting) capable of collecting Energy.

Background

The contents described in this section are merely for providing background information to the present embodiment, and do not constitute conventional techniques.

Surgical scalpels have been used to cut and open organs (Organ) and tissues (Tissue). However, the conventional surgical knife has a risk of bleeding due to the damage of the blood vessel and infection due to the damage of the blood vessel. In addition, the conventional surgical knife requires an additional suturing process, which causes inconvenience such as a long operation time.

To solve these problems, surgical devices have been developed that utilize energy. Surgical devices are known that utilize energy from ultrasonic energy, Radio Frequency (RF), laser, plasma, and the like.

Among them, ultrasonic surgical instruments using ultrasonic energy function as surgical instruments used in various surgical fields such as general surgery, plastic surgery, ophthalmology, prosthetic surgery, urology, neurosurgery, and the like, and perform functions such as incision, disruption, excision (Ablation), and suture of tissues.

To sever and staple tissue, ultrasonic surgical instruments include an End Effector (End Effector) having a Blade (Blade) that vibrates at ultrasonic frequencies. The ultrasonic surgical instrument converts electric power into ultrasonic vibrations using a piezoelectric element, and the converted ultrasonic vibrations are transmitted to a blade through an acoustic waveguide (acoustic waveguide). The end effector grips or separates tissue by the operation of a trigger (trigger), and performs cutting and suturing by the action of transmitted ultrasonic vibration.

The ultrasonic surgical instrument is classified into: a wired ultrasonic surgical instrument that continuously supplies power in a wired form and a wireless ultrasonic surgical instrument that receives the supply of power from a charged battery. Since the wireless ultrasonic surgical instrument receives power supply from the charged battery, the wireless ultrasonic surgical instrument can be driven for different periods of time depending on the capacity of the battery and the charged state of the battery. In this case, if the capacity of the battery is increased, the user feels less comfortable when using the wireless ultrasonic surgical instrument due to the increase in weight caused by the capacity of the battery.

Since the wireless ultrasonic surgical instrument is a surgical tool used during a surgical procedure, if a battery is replaced during the surgical procedure, a patient may be in danger or the success of the surgical procedure may be hindered. Therefore, the following methods need to be developed: that is, a method of increasing the driving time of the wireless ultrasonic surgical instrument by reusing a part of energy generated during the driving of the wireless ultrasonic surgical instrument in the charging of the battery while sufficiently supplying power to the wireless ultrasonic surgical instrument.

Disclosure of Invention

(problems to be solved by the invention)

An object of one embodiment of the present invention is to provide a wireless ultrasonic surgical instrument capable of collecting a part of energy used for driving the wireless ultrasonic surgical instrument again in the form of electric energy in order to increase a driving time.

(measures taken to solve the problems)

According to one aspect of the present invention, there is provided a wireless ultrasonic surgical instrument comprising: an end effector that is directly contacted with a tissue and that can incise or staple the tissue; a handpiece including at least one or more piezoelectric elements for transmitting vibration energy to the end effector; a hand instrument including a control unit that controls the operation of the end effector and controls whether or not to increase the power supply of a power supply device; a shaft assembly coupled to the end effector, receiving vibration energy from the handpiece, rotating the handpiece, and converting a part of the vibration energy based on the rotation into electric energy to be collected; and a battery that supplies power to the handpiece so that the handpiece transmits vibration energy to the end effector and can be charged with electric energy transmitted from the shaft assembly.

In this case, the shaft assembly further includes: a propagation rod which rotates under the action of the vibration energy transmitted from the hand-held handpiece; and a charging sheet that converts a part of the vibration energy generated by the movement of the propagation rod into electric energy and collects it.

Wherein the propagation rod is formed of a substance having conductivity and transmits electricity collected by the charging pad.

The shaft assembly further includes a pressurizing ring that is positioned between the charging pad and the propagation rod and pressurizes the charging pad to promote generation of electric energy.

The shaft assembly further includes a pressing protrusion ring positioned between the charging sheet and the transmission rod and having a shape in which a plurality of rows of protrusions forming grooves protrude to press the charging sheet.

(Effect of the invention)

As described above, according to an aspect of the present invention, there are advantages as follows: the driving time of the wireless ultrasonic surgical instrument can be increased by converting a part of energy used for driving the wireless ultrasonic surgical instrument into electric energy again and collecting the electric energy.

Drawings

Fig. 1 is a diagram showing a wireless ultrasonic surgical instrument according to an embodiment of the present invention.

Fig. 2 is a diagram showing the structure of a hand-held handpiece of one embodiment of the present invention.

Fig. 3 is a diagram showing the structure of a shaft assembly according to a first embodiment of the present invention.

Fig. 4 is a view showing the structure of a shaft assembly according to a second embodiment of the present invention.

Fig. 5 is a view showing the structure of a shaft assembly according to a third embodiment of the present invention.

Fig. 6 is a view showing the structure of a shaft assembly according to a fourth embodiment of the present invention.

Fig. 7 is a view showing the structure of a shaft assembly according to a fifth embodiment of the present invention.

(description of reference numerals)

100: a wireless ultrasonic surgical instrument; 110: a battery; 120: a handpiece is held; 130: a hand-held instrument;

140: a shaft assembly; 150: an end effector; 160: a handle assembly; 170: an adapter;

310: a metal tube; 320: an insulating member; 330. 331, 332: a charging sheet; 340: a cavity;

350: an impact transmission medium; 351: a pressure ring; 352: a pressure relief ring; 360: propagation rod

Detailed Description

Various modifications can be made to the present invention and the present invention may have various embodiments, specific embodiments being described in detail with reference to the accompanying drawings. However, it is not intended to limit the present invention to the specific embodiments, and it should be understood that all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention are included. In describing the various drawings, like reference numerals are used for like elements.

Terms such as "first", "second", "a", "B" and the like may be used to describe various constituent elements, but the above-described constituent elements should not be limited by these terms. The above terms are used only for the purpose of distinguishing one constituent element from other constituent elements. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the scope of the invention. The term "and/or" includes a combination of a plurality of related items or one of a plurality of related items.

It should be understood that when a component is referred to as being "connected" or "coupled" to another component, it may be directly connected or coupled to the other component, but other components may be interposed therebetween. On the other hand, when it is mentioned that a certain constituent element is "directly connected" or "directly coupled" to another constituent element, it should be understood that no other constituent element exists therebetween.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. The terms such as "including" or "having" in the present invention should be understood not to exclude the presence or addition of the features, numerals, steps, operations, constituent elements, components or their combined elements described in the specification.

Unless defined otherwise, all terms including technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In addition, the components, processes, steps, methods, and the like included in the embodiments of the present invention may be shared within a range that is not technically contradictory.

Fig. 1 is a diagram showing a wireless ultrasonic surgical instrument according to an embodiment of the present invention.

Referring to fig. 1, a wireless ultrasonic surgical instrument 100 according to an embodiment of the present invention includes: a battery 110, a handpiece 120, a hand instrument 130, a shaft assembly 140, an end effector 150, a handle assembly 160, and an adapter 170.

The battery 110 supplies power to vibrate the handpiece 120.

The battery 110 receives energy collected in the shaft assembly 140 to be charged, and may also be charged by an external power source. The battery 110 is detachably disposed in the handle assembly 160, and includes a power supply ground portion and a charging ground portion. The power supply ground is electrically connected to the handpiece 120 and can supply power to the handpiece 120. The charging ground portion receives the electric energy collected in the shaft assembly 140 and charges the electric energy. The battery 110 is directly electrically connected to the connection circuit 180 and receives the electric power collected by the shaft assembly 140 through the connection circuit 180.

The handpiece 120 receives power from the battery 110 to generate ultrasonic vibration energy and transmits the ultrasonic vibration to the shaft assembly 140.

Handpiece 120 receives power from battery 110 to generate vibrational energy. Handpiece 120 includes a piezoelectric element that converts electrical energy to vibrational energy and converts vibrational energy to electrical energy. The piezoelectric element receives power applied from the battery 110 and converts it into vibration energy.

Handpiece 120 transmits the generated ultrasonic vibrations to shaft assembly 140. The handpiece 120 is coupled to the hand instrument 130 and is connected to the shaft assembly 140. Handpiece 120 transfers vibrational energy to shaft assembly 140 so that the resulting vibrational energy is transferred to end effector 150.

The hand instrument 130 fixes the handpiece 120 and the shaft assembly 140 and controls the operation of each component in the wireless ultrasonic surgical instrument 100.

The hand instrument 130 secures the handpiece 120 and the shaft assembly 140. The hand tool 130 has insertion ports for the handpiece 120 and the shaft assembly 140, so that the handpiece 120 and the shaft assembly 140 can be inserted into the hand tool 130. The hand instrument 130 fixes the inserted handpiece 120 and the shaft assembly 140 and transmits vibration energy generated by the handpiece 120 to the shaft assembly 140. The vibrational energy is transmitted to the end effector 150 via the shaft assembly 140.

The hand instrument 130 includes a control unit 132 therein to control the operations of the respective components in the wireless ultrasonic surgical instrument 100. The hand instrument 130 includes an input unit 131, and the input unit 131 is used to receive an input such as an operation method of the end effector 150 from a user, and the control unit 132 controls the operation of each member in accordance with the input from the user. For example, when the input unit 131 receives an input from a user to incise tissue with the end effector 150, the control unit 132 increases the power of the battery 110 to increase the amount of vibration energy generated in the handpiece 120. When the battery 110 is in an unfilled state, the control unit 132 charges the battery 110 with electric energy obtained by the shaft assembly 140 from vibration energy generated in the handpiece 120.

The shaft assembly 140 includes a tubular transmission rod and a charging pad (charge patch). The tubular transmission rod transmits the vibration energy transmitted from the hand instrument 130 to the end effector 150, and the charging pad converts the pressure energy generated by the collision of the tubular transmission rod during the movement into electric energy.

One end of the shaft assembly 140 is connected to the end effector 150, and the other end is inserted into and fixed to an insertion port of the hand tool 130. The shaft assembly 140 is fixed to the hand instrument 130 to receive vibration energy transmitted from the hand instrument 130 and transmit the received vibration energy to the end effector 150. At the same time, the shaft assembly 140 can be rotated within the insertion port of the hand instrument 130, and the direction of the end effector 150 can be controlled by this rotation.

The shaft assembly 140 can collect a part of mechanical impact energy generated by rotation during transmission of vibration energy to the end effector 150 as electric energy and supply the electric energy to the battery 110. The charging blade is provided in the shaft assembly 140, so that a part of the impact energy applied to the charging blade can be collected as electric energy while the shaft assembly 140 is rotated in the insertion port of the hand instrument 130. The shaft assembly 140 supplies the collected electric energy to the battery 110 via the hand instrument 130.

After the end effector 150 grips the tissue, the tissue is cut by the transmitted vibration energy and then sutured. The end effector 150 grips or moves away from the tissue according to the motion of the handle assembly 160. When the tissue is grasped, the end effector 150 cuts and staples the tissue by the transmitted vibration energy.

The handle assembly 160 is formed so that a user can hold the wireless ultrasonic surgical instrument 100 and control the end effector 150. The handle assembly 160 includes a handle portion for a user to hold the wireless ultrasonic surgical instrument 100 and a trigger portion for controlling a holding action of the end effector 150.

The adaptor 170 serves to connect the shaft assembly 140 and the hand instrument 130, and also fixes the end of the shaft assembly 140 to the hand instrument 130 when the shaft assembly 140 is rotated. The adaptor 170 is formed of a material capable of well transmitting the vibration energy of the handpiece 120 to the shaft assembly 140, and includes a circuit constituting a path for transmitting the energy collected by the shaft assembly 140 to the battery 110.

The connection circuit 180 is used to connect the battery 110 and the shaft assembly 140. The connection circuit 180 is formed to be able to transmit it to the battery 110 whenever current flows through the shaft assembly 140 and the battery 110 is charged with the electric energy collected by the shaft assembly 140.

Fig. 2 is a diagram showing the structure of a hand-held handpiece of one embodiment of the present invention.

Referring to fig. 2, a handpiece 120 of one embodiment of the present invention includes a housing 210 and an oscillator 220.

The oscillator 220 is disposed in the housing 210 and vibrates when receiving power from the power supply device.

The oscillator 220 includes a fixed element 222, a Tail Mass 224, a piezoelectric element 226, and a Head die 228.

The fixed element 222 is coupled to the head die 228 by the piezoelectric element 226, and thus the piezoelectric element 226 is fixed between the fixed element 222 and the head die 228 as shown in fig. 2. The fixing member 222 and the head die 228 can be coupled by applying a torque to the fixing member 222 from the outside. Here, the fixing member 222 may be formed of a bolt, for example, and a screw thread may be formed at the rear end of the head die 228 in order to couple the fixing member 222 and the head die 228.

At this time, the fixed element 222 applies a force in the direction of the piezoelectric element 226 by the torque acting on the fixed element 222, and the head die 228 also applies a force of the same magnitude in the direction of the piezoelectric element 226 by the reaction of the force acting on the fixed element 222. The piezoelectric element 226 is fixed under the combination of the fixing element 222 and the head die 228.

The piezoelectric element 226 receives power from the battery 110 to generate vibration energy. The vibration energy generated by the piezoelectric element 226 varies according to the frequency supplied to the piezoelectric element 226. The piezoelectric element 226 generates the maximum vibration energy at the natural frequency, and the characteristics of the piezoelectric element 226 such as the natural frequency may be changed by the connection torque of the fixed element 222.

Fig. 3 is a diagram showing the structure of a shaft assembly according to a first embodiment of the present invention.

Referring to fig. 3, the shaft assembly 140 of the first embodiment of the present invention includes a metal pipe 310, an insulating member 320, a charging tab 330, a cavity 340, an impact transmission medium 350, and a propagation rod 360.

The metal pipe 310 accommodates therein an insulating member 320, a charging sheet 330, and a propagation rod 360. One end of metal tube 310 is connected to adapter 170 and the other end is connected to end effector 150. The metal pipe 310 is formed of a metal material and can transmit electric current to the outside. Therefore, the inside of the metal tube 310 is coated with the insulating member 320, thereby preventing the patient from getting electric shock when the wireless ultrasonic surgical instrument 100 is operated.

The insulating member 320 may be interposed between the metal pipe 310 and the charging tab 330. The insulating member 320 is formed of a material such as silicon gel (silicon) to block the flow of electricity to the outside.

The charging tab 330 converts the vibration energy of the propagation rod 360 into electric energy. An impact is applied to the charging pad 330 during movement of the impact transmission medium 350 due to vibration of the propagation rod 360 located within the impact transmission medium 350. The charging pad 330 converts the mechanical energy (impact) thus generated into electric energy.

The charging pad may be formed of a piezoelectric polymer such as Polyvinylidene Fluoride (PVDF). When the impact transmission medium 350 applies an impact to the charging pad 330, the charging pad 330 can generate a voltage by the pressure applied to the charging pad 330. The charging tab 330 covers the entire inside of the metal tube 310 and can simultaneously collect electric power from a plurality of impact sites. The greater the pressure applied to the charging tab 330, the more electrical energy the charging tab 330 is able to collect.

The charging pad 330 can transfer the collected power directly to the battery 110 by means of the connection circuit 180. The charging pad 330 may be directly connected through the connection circuit 180 and a wire, etc., and connected to the battery 110 via the connection circuit 180. Accordingly, whenever power is generated in the charging pad 330, the charging pad 330 transfers the power to the battery 110. The connection circuit 180 flows current therein and is connected to the battery 110 so that the battery 110 can be charged. The connection circuit 180 is formed of another circuit than the circuit that the battery 110 delivers power to the handpiece 120.

The cavity 340 is an empty space inside the metal pipe 210. The chamber 340 houses the impact transfer medium 350 and provides a path for movement of the impact transfer medium 350.

The impact transmission medium 350 is a flowable substance and moves within the cavity 340 in the direction of vibration of the propagation rod 360 moving in the impact transmission medium 350. If the amplitude of propagation rod 360 is large, the impact applied to charging pad 330 by impact transmission medium 350 is large, whereas if the amplitude of propagation rod 360 is small, the impact applied to charging pad 330 is small. Therefore, the strength of the pressure applied to charging sheet 330 by impact transmission medium 350 varies according to the vibration energy of propagation rod 360.

The propagation rod 360 is in the form of a long tubular rod and is formed of a substance having a high elastic coefficient that is light and can react softly to impact.

The propagation rod 360 rotates by the vibration energy received from the piezoelectric element 226, converts the rotational force into the kinetic energy, and transmits the kinetic energy to the end effector 150 in the form of Translational motion (Translational motion). In driving of the wireless ultrasonic surgical instrument 100, the transmission rod 360 moves in the impact transmission medium 350 and generates a wave in the impact transmission medium 350.

Fig. 4 is a view showing the structure of a shaft assembly 141 of a second embodiment of the present invention.

Referring to fig. 4, the shaft assembly 141 of the second embodiment of the present invention includes a metal pipe 310, an insulating member 320, a charging tab 330, a pressurizing ring 351, and a propagation rod 360.

In the shaft assembly 141 according to the second embodiment of the present invention, since the pressure ring 351 is attached to the propagation rod 360, the pressure ring 351 moves together when the propagation rod 360 moves.

Since the pressure ring 351 is disposed to be fitted around the propagation rod 360 and attached to the propagation rod 360, a portion of the charging sheet 330 to which pressure is applied is changed according to a position at which the propagation rod 360 moves. The pressure ring 351 may be formed of a material having excellent wear resistance that is not easily worn by friction, and may be formed of a substance having a low friction coefficient to prevent the movement of the propagation rod 360 from being hindered by friction with the charging pad 330. In particular, the pressure ring 351 may be formed of a material such as silicon gel.

The pressure ring 351 moves following the propagation rod 360, and a portion of the charging sheet 330 to which pressure is applied changes, thereby generating a potential change by the piezoelectric. The charge sheet 330 may transfer the piezoelectric-based potential change to the battery 110 as electric energy collection.

Fig. 5 is a view showing the structure of a shaft assembly according to a third embodiment of the present invention.

Referring to fig. 5, the shaft assembly 142 of the third embodiment of the present invention includes a metal tube 310, an insulating member 320, a charging tab 330, a pressurizing projection ring 352, and a propagation rod 360.

In the shaft assembly 142 according to the third embodiment of the present invention, since the pressurizing projection ring 352 is fitted over the propagation rod 360, the pressurizing projection ring 352 moves together when the propagation rod 360 moves.

The pressing protrusion ring 352 has a shape in which a plurality of rows of embossments forming grooves are protruded, and a plurality of rows of embossments (embossments) are protruded toward the charging sheet 330. Since pressing projection ring 352 is formed with a groove, unlike pressing ring 351, only the protruding portion can be brought into contact with charging sheet 330 to press charging sheet 330. Therefore, pressure projecting ring 352 can reduce the loss of the vibration energy of transmission lever 360 due to friction with charging sheet 330, as compared with pressure ring 351.

Fig. 6 is a view showing the structure of a shaft assembly according to a fourth embodiment of the present invention.

Referring to fig. 6, the shaft assembly 144 of the fourth embodiment of the present invention includes a metal pipe 310, an insulating member 320, a charging tab 331, and a propagation rod 360.

The shaft assembly 144 according to the fourth embodiment of the present invention includes a charging plate 331 located on the transmission rod 360. Accordingly, the charging pad 331 moves along the moving path of the propagation rod 360 together with the propagation rod 360. The portion of charging pad 331 in contact with insulating member 320 changes due to the vibration of transmission rod 360. Therefore, the charging sheet 331 collects the voltage energy generated at the moment of separation after contact with the insulating member 320, and can charge the battery 110.

Fig. 7 is a view showing the structure of a shaft assembly according to a fifth embodiment of the present invention.

Referring to fig. 7, the shaft assembly 145 according to the fifth embodiment of the present invention includes a metal pipe 310, an insulating member 320, a charging sheet 332, a propagation rod 360, and a pressurizing protrusion 370.

The pressurizing protrusion 370 is formed on the insulating member 320, and may be a protrusion protruding toward the propagation rod 360. The pressurizing protrusion 370 pressurizes the charging sheet 332 by a plurality of protrusions to generate a piezoelectric effect on the charging sheet 332.

The charging tab 332 may be formed in such a manner as to cover the propagation rod 360. The contact portion of the charging sheet 332 with the pressurizing protrusion 370 may be changed according to the movement of the propagation rod 360, and the charging sheet 332 collects the voltage generated at the moment of separation after contact with the pressurizing protrusion 370 and may charge the battery 110.

The above description is merely an illustrative description of the technical concept of the present embodiment, and various modifications and variations can be made by those skilled in the art without departing from the essential characteristics of the present embodiment. Therefore, the present embodiment is not intended to limit the technical idea of the present embodiment but for illustration, and the scope of the technical idea of the present embodiment is not limited by the embodiments. The scope of the present embodiment should be construed by the appended claims, and all technical ideas within the equivalent scope thereof should be construed as being included in the scope of the claims of the present embodiment.