The ultrasound generating device for therapy and the handle for ultrasound practice are integrated into the same unit.
Patent Information
- Application Number
- TH2201003612
- Authority / Receiving Office
- TH · TH
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2020-12-14
- Publication Date
- 2026-07-20
AI Technical Summary
Existing ultrasonic obesity treatment devices face challenges in achieving uniform treatment due to changes in depth of focus and energy distribution, particularly with pivot-driven systems that result in curved energy delivery, leading to reduced effectiveness.
A therapeutic ultrasonic generator and handpiece design that moves the focus of ultrasonic waves in a circular manner on the same plane using an inclined ultrasonic transducer unit, supported by a ball joint and torsion bar member, allowing for uniform energy application and miniaturization of the handpiece.
This design ensures uniform energy distribution at a constant depth, improving treatment performance by maintaining energy application evenly across the treatment area, and allows for miniaturization of the handpiece for localized treatments like under the eyes.
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Abstract
Description
Therapeutic ultrasound generator and an ultrasonic therapy handpiece including the same
[0001] The present invention relates to a therapeutic ultrasound generator and an ultrasound treatment handpiece including the same, and more specifically, to a therapeutic ultrasound generator and an ultrasound treatment handpiece including the same that can miniaturize the size of the ultrasound treatment handpiece by simplifying the structure for moving the focus of ultrasound generated from an ultrasound generator in a circular motion on the same plane.
[0002] Recently, as dietary habits have become Westernized, obesity has rapidly increased and has become the biggest cause of harm to public health and beauty. Various diet programs and ultrasonic obesity treatment devices have been developed and are widely used to treat this.
[0003] High Intensity Focused Ultrasound (HIFU) obesity treatment technology was originally used for anticancer treatment purposes to non-invasively destroy cancer cells by selectively coagulating internal organ tumors at high temperatures, but Solta Medical in the United States developed the first device called Liposonix equipped with HIFU for the treatment of abdominal obesity in the human body.
[0004] The process of fat destruction using HIFU (high intensity focused ultrasound) involves focusing focused ultrasound waves on a specific point within a fat cell, causing the tissue temperature to rise instantaneously to 65°C to 100°C, thereby destroying the tissue.
[0005] Unlike other dermatological devices, such as lasers and RF radio frequency devices, HIFU equipment non-invasively concentrates HIFU energy on selected areas without causing any damage to the skin surface, inducing coagulation necrosis of fat. These necrotic fat cells are naturally removed by the body's damage repair mechanism.
[0006] A known ultrasonic obesity treatment device is Korean Patent Registration No. 10-1365946 (published Feb. 24, 2014), titled "High-intensity focused ultrasound generating device for reduction of subcutaneous fat layer."
[0007] The above-mentioned 'high-intensity focused ultrasound generating device for reducing the subcutaneous fat layer' penetrates the interior of the skin by moving the transducer to a desired point in the X-axis and Y-axis directions and then pivoting it around the axis.
[0008] However, the aforementioned 'high-intensity focused ultrasound generating device for reducing the subcutaneous fat layer' has a problem in that, when providing ultrasound via pivot drive, the ultrasound is delivered in a curved (arc) shape due to the characteristics of the pivot drive, resulting in a decrease in energy delivered to the skin as it moves toward the periphery and a change in focal depth, which prevents uniform treatment.
[0009] In order to solve these problems, the applicant has proposed a structure in Korean Patent Registration No. 1649899, "Therapeutic Ultrasound Generator," which includes a focus rotation moving unit that moves the focus of ultrasound generated from an ultrasound generating unit in a circular shape on the same plane, thereby forming the focus of the ultrasound into a circle with a constant radius at a uniform depth within the skin, and applying energy uniformly and evenly within the radius to improve therapeutic performance.
[0010] However, Korean Patent Registration No. 1649899, "Therapeutic Ultrasound Generator," had a structure in which multiple protruding members protruding at different heights were brought into contact with the upper surface of the ultrasound generator, which had a problem in that it was difficult to reduce the size and stably move the focus of the ultrasound generated from the ultrasound transducer in a circular motion on the same plane.
[0011] The objective of the present invention is to provide a therapeutic ultrasound generator that improves obesity treatment performance by moving the focus of the ultrasound in a circular manner at a uniform depth within the skin to penetrate the ultrasound evenly and uniformly into the skin, and an ultrasound treatment handpiece including the same.
[0012] Another objective of the present invention is to provide a therapeutic ultrasound generator capable of performing ultrasound treatment on localized areas of a patient's skin, such as under the eyes, and an ultrasound treatment handpiece including the same, by simplifying the structure for moving the focus of ultrasound generated from an ultrasound transducer in a circular motion on the same plane, thereby enabling the size of the handpiece for ultrasound treatment to be miniaturized.
[0013] To achieve the above objectives, one embodiment of a therapeutic ultrasound generator according to the present invention comprises: a cartridge housing; an ultrasound transducer unit located within the cartridge housing and positioned at an angle with respect to the rotational center axis direction to generate ultrasound in the angled direction; an inclined block unit located within the cartridge housing and having an inclined surface on its lower surface to support the upper surface of the ultrasound transducer unit and position the ultrasound transducer unit at an angle with respect to the rotational center axis direction; and a rotary motor for rotating the inclined block unit.
[0014] In the present invention, a ball joint portion to which an ultrasonic transducer is rotatably coupled is positioned protrudingly at the center of the inclined block portion, and a plurality of supporting ball members that support the upper surface of the ultrasonic transducer and rotate are positioned protrudingly at the lower portion of the inclined block portion, and the ultrasonic transducer can be positioned at an incline by being coupled to the ball body of the ball joint portion and supported in a state where its upper surface is in contact with each of the plurality of supporting ball members.
[0015] One embodiment of the therapeutic ultrasound generator according to the present invention may further include a torsion bar member, one end of which is connected to the ultrasound transducer part and the other end of which is connected to the cartridge housing part.
[0016] In the present invention, the torsion bar member may include a first mounting part mounted on the ultrasonic transducer part, a second mounting part mounted on the inner surface of the cartridge housing part, and a torsion spring part having both ends connected to the first mounting part and the second mounting part, respectively, and absorbing shock through torsional elasticity.
[0017] In the present invention, the torsion spring portion may be formed to have at least one bent portion or a curved portion.
[0018] In the present invention, the ultrasonic transducer unit is tilted continuously in all directions of 360 degrees with the same angle with respect to the rotational center axis direction, so that the focus of the ultrasonic waves generated by the ultrasonic transducer unit can be moved to form a circle on the same plane.
[0019]
[0020] To achieve the above objectives, one embodiment of an ultrasonic treatment handpiece according to the present invention may include an ultrasonic transducer part, a cartridge housing part in which the ultrasonic transducer part is located, and a main body housing part to which the cartridge housing part is detachably coupled.
[0021] One embodiment of an ultrasonic treatment handpiece according to the present invention further comprises: an inclined block portion located within the cartridge housing portion and having an inclined surface on the lower portion to support the upper surface of the ultrasonic transducer portion and position the ultrasonic transducer portion at an inclination with respect to the rotational center axis direction; and a rotary motor for rotating the inclined block portion, wherein the ultrasonic transducer portion is positioned at an inclination with respect to the rotational center axis direction and can generate ultrasound in the inclination direction.
[0022] In the present invention, a ball joint portion to which an ultrasonic transducer is rotatably coupled is positioned protrudingly at the center of the inclined block portion, and a plurality of supporting ball members that support the upper surface of the ultrasonic transducer and rotate are positioned protrudingly at the lower portion of the inclined block portion, and the ultrasonic transducer can be positioned at an incline by being coupled to the ball body of the ball joint portion and supported in a state where its upper surface is in contact with each of the plurality of supporting ball members.
[0023] One embodiment of the handpiece for ultrasonic therapy according to the present invention may further include a torsion bar member, one end of which is connected to the ultrasonic transducer part and the other end of which is connected to the cartridge housing part.
[0024] In the present invention, the torsion bar member may include a first mounting part mounted on the ultrasonic transducer part, a second mounting part mounted on the inner surface of the cartridge housing part, and a torsion spring part having both ends connected to the first mounting part and the second mounting part, respectively, and absorbing shock through torsional elasticity.
[0025] In the present invention, the ultrasonic transducer unit is tilted continuously in all directions of 360 degrees with the same angle with respect to the rotational center axis direction, so that the focus of the ultrasonic waves generated by the ultrasonic transducer unit can be moved to form a circle on the same plane.
[0026] In the present invention, a handle portion that can be grasped by a practitioner is positioned to protrude from one side of the main body housing portion, and the handle portion may include a handle connecting portion positioned by bending toward the upper side of the main body housing portion and a handle main body positioned downward by bending from the handle connecting portion.
[0027] In the present invention, a handle portion that can be grasped by a practitioner is positioned protrudingly on one side of the main body housing portion, and may further include a handle hinge portion that rotates the main body housing portion around a hinge axis portion by being positioned between the main body housing portion and the handle portion, or between the divided portions when the handle portion is divided into two parts.
[0028] In the present invention, the handle hinge portion may include a rotation stopper portion that restricts the rotation angle of the handle portion rotating around the hinge axis portion.
[0029] In the present invention, the rotational stopper portion may include a plurality of restraining grooves spaced apart on the outer circumference of the hinge shaft portion and a stopper projection that protrudes into the inner circumference of the shaft hole where the hinge shaft portion is located, is inserted into the restraining grooves, and detaches from the restraining grooves and moves to the next restraining groove in the rotational direction when a rotational force greater than a preset rotational force is applied.
[0030] In the present invention, the handle hinge portion may include an angle adjustment motor that rotates the hinge shaft portion to adjust the angle of the main body housing portion, and an angle adjustment switch portion located in the handle portion and controlling the operation of the angle adjustment motor.
[0031] One embodiment of the handpiece for ultrasonic therapy according to the present invention further includes a plurality of contact sensor units located on the lower surface of the cartridge housing unit to detect contact with the skin by the window unit of the cartridge housing unit, and the angle adjustment motor is connected to the contact sensor unit to receive a contact signal detected by the contact sensor unit and adjusts the angle of the main body housing unit so that the front surface of the window unit can be in close contact with the skin.
[0032] In the present invention, the handle hinge portion may further include a clearance bushing portion into which the hinge shaft portion is inserted and which causes the hinge shaft portion to rotate when a rotational force greater than a preset rotational force is applied.
[0033] In the present invention, the handle hinge portion may further include a brake pad that brakes the rotation of the hinge shaft portion and a brake operating knob portion that presses the hinge shaft portion with the brake pad.
[0034] The present invention has the effect of improving treatment performance by applying energy uniformly and evenly to the treatment area by planar shifting the focus of the ultrasound at a uniform depth within the skin, and by forming the focus of the ultrasound into a circle with a constant radius at a uniform depth within the skin so that energy is applied uniformly and evenly within the radius.
[0035] In addition, the present invention has the effect of enabling ultrasound treatment on localized areas of a patient's skin, such as under the eyes, by simplifying the structure that moves the focus of the ultrasound generated from the ultrasound transducer in a circular motion on the same plane and miniaturizing the size of the handpiece for ultrasound treatment.
[0036] FIG. 1 is a perspective view illustrating one embodiment of an ultrasonic treatment handpiece according to the present invention.
[0037] FIG. 2 is an exploded perspective view illustrating one embodiment of an ultrasonic treatment handpiece according to the present invention.
[0038] FIG. 3 is a cross-sectional view illustrating one embodiment of a therapeutic ultrasound generator according to the present invention.
[0039] FIG. 4 is a drawing illustrating an example of operation of a therapeutic ultrasound generator according to the present invention.
[0040] FIG. 5 is a schematic diagram comparing a comparative example and an embodiment of a therapeutic ultrasound generator according to the present invention.
[0041] FIGS. 6 to 8 are drawings illustrating other embodiments of an ultrasonic treatment handpiece according to the present invention.
[0042] FIG. 9 is a cross-sectional view illustrating another embodiment of the handle hinge portion of an ultrasonic treatment handpiece according to the present invention.
[0043] Explanation of major symbols in the drawings
[0044] 100: Main body housing 101: Cartridge locking hole
[0045] 110: Handle part 111: Handle connecting part
[0046] 112: Handle body 120: Supply pipe connection
[0047] 130: Discharge pipe connection part 140: Second sensor connection terminal part
[0048] 200: Cartridge housing part 201: Upper housing part
[0049] 202: Cone housing part 203: Window part
[0050] 210: Protruding pipe section for supplying medium 220: Protruding pipe section for discharging medium
[0051] 230: Temperature sensing unit 231: First sensor connection terminal unit
[0052] 300: Ultrasonic transducer section 400: Inclined block section
[0053] 410: Block rotation shaft part 411: Connecting shaft part
[0054] 420 : Ball joint part 421 : Ball body
[0055] 422 : Ball support axis 430 : Support ball member
[0056] 500: Rotary motor 510: Shaft adapter part
[0057] 600 : Torsion bar member 610 : First mounting part
[0058] 620: Second mounting part 630: Torsion spring part
[0059] 700: Handle hinge part 710: Hinge shaft part
[0060] 720: Rotating stopper part 721: Restraint groove part
[0061] 722 : Stopper projection 722a : Stopper ball member
[0062] 722b : Stopper spring member 730 : Angle adjustment motor
[0063] 740: Angle adjustment switch unit 750: Contact sensor unit
[0064] 1000 : Control unit
[0065] The present invention will be described in more detail below.
[0066] Preferred embodiments of the present invention will be described in detail with reference to the attached drawings as follows. Prior to the detailed description of the present invention, terms and words used in the specification and claims described below should not be interpreted as being limited to their ordinary or dictionary meanings. Accordingly, the embodiments described in the specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; therefore, it should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application.
[0067] FIG. 1 is a perspective view illustrating one embodiment of an ultrasonic treatment handpiece according to the present invention, FIG. 2 is an exploded perspective view illustrating one embodiment of an ultrasonic treatment handpiece according to the present invention, and FIG. 3 is a cross-sectional view illustrating one embodiment of a therapeutic ultrasonic generating device according to the present invention.
[0068] Referring to FIGS. 1 and 2, the handpiece for ultrasonic therapy according to the present invention includes a cartridge housing part (200) in which an ultrasonic transducer part (300) is located inside, and a main body housing part (100) to which the cartridge housing part (200) is detachably coupled.
[0069] The handpiece for ultrasonic therapy according to the present invention is connected to a control body (1000) by a handpiece cable body (1100) comprising a power cable, a medium supply line and a medium discharge line for circulating the medium within a cartridge housing (200). It should be noted that the handpiece cable body and the control body can be implemented by various modifications as known examples in known ultrasonic therapy devices, and therefore further detailed description is omitted.
[0070] A cartridge locking member (101) capable of securing the cartridge housing member (200) is positioned in the main body housing member (100), and the cartridge locking member (101) is elastically supported by a spring so that a wedge-shaped locking member engages with a locking groove located inside the cartridge housing to secure the combined state of the cartridge housing member (200), and when pressed, the locking member is disengaged from the locking groove so that the cartridge housing member (200) can be separated.
[0071] It should be noted that the cartridge housing part (200) may be maintained in a combined state with the main body housing part (100) or separated by applying a known locking structure that can be released in addition to the cartridge locking part (101), so further detailed explanation is omitted.
[0072] A handle portion (110) that can be grasped by a practitioner is located on one side of the main body housing portion (100).
[0073] The handle portion (110) includes a handle connecting portion (111) positioned by bending toward the upper side of the main body housing portion (100), and a handle main body (112) positioned downward by bending from the handle connecting portion (111).
[0074] The operator can perform the procedure by grasping the handle body (112), which is bent at the handle connection part (111) and extends integrally downward, and easily pressing the window part (203) of the cartridge housing part (200) against the skin.
[0075] The handle portion (110) has a shape that is bent upward and then curved to extend downward, and is designed to hold the part extended downward, i.e., the handle body (112), thereby minimizing the load applied to the practitioner during the procedure and allowing the window portion (203) of the cartridge housing portion (200) to be easily attached to the skin for the procedure.
[0076] Meanwhile, the therapeutic ultrasound generator according to the present invention includes a cartridge housing (200) having a window (203) through which ultrasound is transmitted located at the bottom, and an ultrasound transducer (300) located within the cartridge housing (200) and generating ultrasound toward the bottom.
[0077] It should be noted that the window part (203) is made of a transparent or translucent material through which ultrasound is transmitted, and is made of a known material that transmits ultrasound, so further detailed description is omitted.
[0078] The cartridge housing portion (200) includes an upper housing portion (201) that is detachably coupled to the main body housing portion (100), and a cone-shaped housing portion (202) located on the lower side of the upper housing portion (201) and having a diameter that gradually decreases toward the lower side.
[0079] The cartridge housing portion (200) includes a cylindrical upper housing portion (201) and a cone-shaped cone housing portion (202) whose diameter gradually decreases toward the lower side, thereby sufficiently securing an internal space to position an operating portion for rotating the ultrasonic transducer portion (300), and also reducing the contact area with the skin through the lower surface of the cone housing portion (202) so that it can smoothly contact a local area.
[0080] A window portion (203) is positioned on the lower surface of the cone housing portion, and the window portion (203) is formed in a size that allows for ultrasonic treatment to be performed by contacting a local area of the patient's skin, such as under the eyes.
[0081] The cartridge housing (200) has a sealed internal structure and is filled with an ultrasonic transmission medium.
[0082] As an example, the medium for ultrasonic transmission is water, and it should be noted that it can be implemented by modifying it in various ways using other known media for ultrasonic transmission.
[0083] The ultrasonic transmission medium can perform the role of not only transmitting ultrasound but also cooling the patient's skin through the window portion (203) that comes into contact with the skin.
[0084] On the upper surface of the cartridge housing (200), a protruding tube portion (210) for supplying a medium for circulating an ultrasonic transmission medium and a protruding tube portion (220) for discharging a medium are positioned to protrude.
[0085] Additionally, an inclined block portion (400) having an inclined surface on the lower portion is positioned within the cartridge housing portion (200), and the inclined block portion (400) is rotated by a rotary motor (500).
[0086] The inclined block portion (400) has a block rotation shaft portion (410) protruding upwardly, which is detachably connected to the shaft of the rotation motor (500).
[0087] The rotary motor (500) is located within the main body housing (100), and the upper surface of the block rotation shaft (410) is positioned so as to be exposed on the upper part of the cartridge housing (200), or the block rotation shaft (410) is positioned so as to be protruded and connected to the rotary motor (500) located within the main body housing (100).
[0088] It should be noted that the block rotation shaft portion (410) is rotatably positioned on the upper surface of the cartridge housing portion and can be implemented using a known sealing structure that seals the rotation shaft, and further detailed description is omitted.
[0089] The block rotation shaft portion (410) is provided with a connecting shaft portion (411) that protrudes from the upper surface of the cartridge housing portion (200), and the shaft of the rotation motor (500) is provided with a shaft adapter portion (510) that is connected to the block rotation shaft portion (410) by inserting the connecting shaft portion (411) into it.
[0090] As an example, the shaft adapter part (510) has a shaft insertion part that is open to the lower side so that a connecting shaft part (411) is inserted inside, the connecting shaft part (411) is a shaft having a polygonal cross-section, and the shaft insertion part is a polygonal insertion groove part corresponding to the connecting shaft part (411).
[0091] Inside the main body housing (100), when the cartridge housing (200) is coupled, a supply pipe connection part (120) and a discharge pipe connection part (130) are located to connect the medium supply protruding pipe part (210) and the medium discharge protruding pipe part (220) to a medium circulation part (not shown) located within the control main body (1000) that controls the operation of the ultrasonic treatment handpiece.
[0092] It should be noted that the control body (1000) can be implemented in various modified forms in a known ultrasonic treatment device that includes a control unit for controlling the operation of an ultrasonic treatment handpiece and a medium circulation unit for circulating an ultrasonic transmission medium, so a more detailed description is omitted.
[0093] It should be noted that a medium circulation section, although not shown, can be implemented in various modified forms of a known cooling water circulation structure including a medium storage tank, a medium supply line section connecting the medium storage tank and the supply pipe connection section (120), a medium discharge line section connecting the medium storage tank and the discharge pipe connection section (130), a valve located in the medium supply line section, and a medium cooling section located in the medium storage tank, and further detailed description is omitted.
[0094] The supply pipe connection part (120) is provided with a first protruding pipe insertion part into which a protruding pipe part (210) for supplying a medium is inserted, and the discharge pipe connection part (130) is provided with a second protruding pipe insertion part into which a protruding pipe part (210) for supplying a medium is inserted.
[0095] As an example, the medium supply protruding pipe section (210) is inserted into the first protruding pipe insertion section to open the flow path and connect to the medium supply line section, and the medium discharge protruding pipe section (220) is inserted into the second protruding pipe insertion section to open the flow path and connect to the medium discharge line section.
[0096] It should be noted that the protruding pipe section (210) for supplying the medium and the supply pipe connection section (120), and the protruding pipe section (220) for discharging the medium and the discharge pipe connection section (130) can be implemented in various modified forms of a known pipe connection structure that includes a valve that opens when connected, connecting two pipes to each other.
[0097] Additionally, the therapeutic ultrasound generator according to the present invention further includes a temperature sensing sensor unit (230) for detecting the temperature of the ultrasound transmission medium within the cartridge housing unit (200), and the temperature sensing sensor unit includes a first sensor connection terminal unit (231) that protrudes from the upper surface of the cartridge housing unit (200) and is connected to the control body (1000).
[0098] A second sensor connection terminal (140) is located within the main body housing (100) and is connected to the first sensor connection terminal (231) to connect the temperature sensing sensor (230) to the control main body (1000), and a terminal insertion part into which the first sensor connection terminal (231) is inserted is located in the second sensor connection terminal (140).
[0099] As an example, the first sensor connection terminal part (231) is inserted into the terminal insertion part and is connected to the control part of the control body (1000) through the second sensor connection terminal part (140).
[0100] When the cartridge housing portion (200) is coupled to the main body housing portion (100), the connecting shaft portion (411) of the block rotation shaft portion (410) is inserted into the shaft insertion portion of the shaft adapter portion (510), thereby connecting the block rotation shaft portion (410) and the shaft of the rotation motor, and the medium supply protruding tube portion (210) is inserted into the first protruding tube insertion portion of the supply pipe connection portion (120) to be connected to the medium circulation portion of the control main body (1000), and the medium discharge protruding tube portion (220) is inserted into the second protruding tube insertion portion of the discharge pipe connection portion (130) to be connected to the medium circulation portion of the control main body (1000). Additionally, the temperature sensing sensor portion (230) is connected to the control portion of the control main body (1000) as the first sensor connection terminal portion (231) is inserted into the second sensor connection terminal portion (140).
[0101]
[0102] Meanwhile, the inclined block portion (400) has a block rotation axis portion (410) protruding from the center and is rotatably positioned within the cartridge housing portion (200), and an inclined surface is positioned on the lower portion.
[0103] The inclined block portion (400) supports the upper surface of the ultrasonic transducer portion (300) with an inclined surface located on the lower portion, thereby maintaining the ultrasonic transducer portion (300) in an inclined state.
[0104] A ball joint portion, to which an ultrasonic transducer portion (300) is rotatably coupled, is positioned protrudingly at the center of the inclined block portion (400).
[0105] The ball joint part includes a ball body (421) that is rotatably inserted into the upper side of the ultrasonic transducer part (300) and a ball support shaft (422) that protrudes above the ball body (421) and is connected to the inclined block part (400).
[0106] The upper part of the ball support shaft (422) is fixed to the center of the inclined block part (400) so that the ultrasonic transducer part (300) is continuously tilted in all directions 360 degrees around the ball body (421) by the rotation of the inclined block part (400).
[0107] A plurality of supporting ball members (430) that support and rotate the upper surface of the ultrasonic transducer part (300) are positioned protrudingly on the lower surface of the inclined block part (400), and a portion of the supporting ball members (430) is positioned so as to be rotatably inserted into the inclined block part (400), while the remaining portion protrudes to support the upper surface of the ultrasonic transducer part (300).
[0108] A plurality of support ball members (430) protrude at the same height from the lower surface of the inclined block (400) so that the ultrasonic transducer part (300) is tilted at the same angle as the inclined surface, and all support ball members (430) can stably contact and support the upper surface of the ultrasonic transducer part (300) while the ultrasonic transducer part (300) is tilted.
[0109] The ultrasonic transducer part (300) is coupled to the ball body (421) and is positioned at an angle, supported so that its upper surface is in contact with each of the multiple supporting ball members (430).
[0110] A plurality of support ball members (430) are positioned at equal distances in the circumferential direction from the center of the inclined block (400), that is, arranged radially from the center of the inclined block (400) to stably support the upper surface of the ultrasonic transducer (300) which is continuously tilted in all directions of 360 degrees.
[0111] The ultrasonic transducer part (300) is continuously tilted in all directions (360 degrees) by the tilting block part (400) when the tilting block part (400) is rotated by the rotary motor (500).
[0112] Meanwhile, one embodiment of the therapeutic ultrasound generator according to the present invention miniaturizes the structure that allows the ultrasound transducer part (300) to be continuously tilted in all directions (360 degrees) through the inclined block part (400) and the support ball member (430) located on the lower surface of the inclined block part (400).
[0113] One embodiment of the therapeutic ultrasound generator according to the present invention may further include a torsion bar member (600) having one end connected to an ultrasound transducer part (300) and the other end connected to a cartridge housing part (200).
[0114] The torsion bar member (600) absorbs vibrations generated when the ultrasonic transducer part (300) is continuously tilted in all directions (360 degrees) to ensure operational stability of the ultrasonic transducer part (300).
[0115] The torsion bar member (600) absorbs vibrations generated when the ultrasonic transducer part (300) is continuously tilted in all directions (360 degrees) so that the operational stability of the ultrasonic transducer part (300) can be secured even when the structure that causes the ultrasonic transducer part (300) to be continuously tilted in all directions (360 degrees) is miniaturized.
[0116] When the structure is miniaturized, the radius at which the ultrasonic transducer part (300) continuously tilts in all directions of 360 degrees becomes smaller, and the impact on the ultrasonic transducer part (300) is repeated in a short period, and thus vibration may occur. The torsion bar member (600) uses torsional elasticity to absorb the impact generated when the ultrasonic transducer continuously tilts in all directions of 360 degrees with a short radius, thereby enabling the ultrasonic focus to be stably moved to form a circle on the same plane when the ultrasonic transducer part (300) continuously tilts in all directions of 360 degrees.
[0117] The torsion bar member (600) includes a first mounting part (610) mounted on the ultrasonic transducer part (300), a second mounting part (620) mounted on the inner surface of the cartridge housing part (200), and a torsion spring part (630) with both ends connected to the first mounting part (610) and the second mounting part (620), respectively.
[0118] The torsion spring portion (630) is formed to have at least one bent portion or a curved portion so as to absorb shock with torsional elasticity.
[0119] The torsion spring part (630) can be formed in an S-shape, a C-shape, etc., for example, and has a length that can absorb the shock when the ultrasonic transducer part (300) is tilted continuously in all directions 360 degrees with the same angle with respect to the rotational center axis direction.
[0120] The torsion bar member (600) may be provided in multiple numbers, and as an example, is provided as a pair positioned facing each other on the side of the ultrasonic transducer part (300).
[0121] The torsion bar members (600) are provided as a pair positioned facing each other to further ensure the operational stability of the ultrasonic transducer part (300).
[0122] FIG. 4 is a drawing illustrating an example of operation of a therapeutic ultrasonic generator according to the present invention. Referring to FIG. 3 and FIG. 4, the ultrasonic transducer part (300) is positioned at an angle equal to the inclination of the inclined surface while being supported by contacting a plurality of support ball members (430) protruding from the inclined surface of the inclined block part (400) in a state where the ball body (421) of the ball joint is rotatably coupled.
[0123] In this state, when the inclined block part (400) is rotated by the rotary motor (500), the ultrasonic transducer part (300) is continuously tilted in all directions 360 degrees around the ball body (421), and at this time, the focus of the ultrasonic waves generated from the ultrasonic transducer part (300) moves to form a circle on the same plane.
[0124] In addition, the torsion bar member (600) absorbs vibrations generated when the ultrasonic transducer part (300) is tilted continuously in all directions (360 degrees) through torsional elasticity, allowing the focus of the ultrasonic waves to move stably in a circular shape on the same plane.
[0125] That is, the ultrasonic transducer part (300) is continuously tilted in all directions 360 degrees around the ball body (421) and stably moves the focus to form a circle on the same plane.
[0126] The therapeutic ultrasound generator according to the present invention can further improve therapeutic performance by forming the focus of the ultrasound into a circle with a constant radius at a uniform depth within the skin and applying energy uniformly and evenly within the radius.
[0127] FIG. 5 is a schematic diagram comparing a comparative example and an embodiment of a therapeutic ultrasound generator according to the present invention. FIG. 5 (a) illustrates a comparative example of the present invention in which an ultrasound transducer unit irradiates ultrasound in a direction perpendicular to the skin so that the focus is formed at a preset reference depth (M) within the skin, and FIG. 5 (b) illustrates an embodiment of the present invention in which an ultrasound transducer unit (300) is tilted with respect to the rotational center axis direction so that the focus is formed at a preset reference depth (M) within the skin, thereby showing the focus (C) of the ultrasound at the reference depth (M).
[0128] The focal point irradiated within the skin forms an elliptical shape, and it is desirable for the center of the focal point to be located at a preset reference depth (M) within the skin, and converging as much as possible relative to the reference depth (M) can improve the treatment effect.
[0129] In Fig. 5(a), when the ultrasound transducer unit irradiates ultrasound in a direction perpendicular to the skin so that it is focused at a preset reference depth (M) within the skin, an elliptical focus is positioned in the vertical direction and the height of the focus (a) is maximized.
[0130] In contrast, as shown in FIG. 5(b), an embodiment of the present invention irradiates ultrasound onto the skin while the ultrasonic transducer (300) is tilted, so the focus (C) is positioned at a tilted reference depth (M) within the skin. Therefore, compared to the comparative example of the present invention shown in FIG. 5(a), the height of the focus is reduced and the focus is more concentrated at the reference depth (M), thereby producing an effect.
[0131] That is, the therapeutic ultrasound generator according to the present invention can greatly improve the skin treatment effect by having the ultrasound focus (C) move in a circular shape on the same plane while tilted through a structure that causes the ultrasound transducer part (300) to tilt continuously in all directions of 360 degrees, thereby concentrating the focus more at a reference depth (M).
[0132] Meanwhile, FIGS. 6 to 8 illustrate another embodiment of an ultrasonic treatment handpiece according to the present invention. Referring to FIGS. 6 to 8, the ultrasonic treatment handpiece according to the present invention may further include a handle hinge portion (700) that is positioned between the main body housing portion (100) and the handle connecting portion (111), or between the handle connecting portion (111) and the handle main body (112), and can rotate the main body housing portion (100) to adjust the angle of the main body housing portion (100).
[0133] That is, the handle hinge portion (500) may be located between the main body housing portion (100) and the handle portion (110), or between the separated portions when the handle portion (110) is divided into two parts.
[0134] FIG. 6(a) and FIG. 8(a) are examples in which the handle hinge portion (700) is located between the main body housing portion (100) and the handle connecting portion (111), and FIG. 6(b) and FIG. 8(b) are examples in which the handle hinge portion (700) is located between the handle connecting portion (111) and the handle main body (112).
[0135] Through the handle hinge part (700), the practitioner can rotate the main body housing part (100) according to the treatment area to completely close the window part (203) of the cartridge housing part (200) to the treatment area, thereby ensuring convenience in treatment and preventing accidents such as burns on the practitioner's skin from falling off the treatment area during treatment, and allowing the procedure to be performed safely.
[0136] Referring to FIGS. 6 and 7, the handle hinge portion (700) may include a hinge shaft portion (710) and a rotation stopper portion (720) that restricts the rotation angle of the main body housing portion (100) which rotates around the hinge shaft portion (710).
[0137] The rotational stopper part (720) includes a plurality of restraining grooves (721) spaced apart from the outer surface of the hinge shaft part (710), and a stopper projection part (722) located on either side of the handle part (110) and the main body housing part (100), protruding into the inner surface of the shaft hole, inserted into the restraining groove part (721), and detached from the restraining groove part (721) and moved to the next restraining groove part (721) in the rotational direction when a rotational force greater than a preset rotational force is applied.
[0138] As an example, the stopper projection (722) includes a stopper ball member (722a) protruding into the inner circumference of the shaft hole and a stopper spring member (722b) that elastically supports the stopper ball member (722a).
[0139]
[0140] It should be noted that the stopper projection (722) can also be modified into various known structures that can be inserted into another groove when a force greater than a preset amount is applied, so further detailed description is omitted.
[0141] Referring to FIG. 8, the handle hinge portion (700) may include a hinge shaft portion (710) and an angle adjustment motor (730) that rotates the hinge shaft portion (710) to adjust the angle of the main body housing portion (100).
[0142] Additionally, the handle hinge portion (700) may further include an angle adjustment switch portion (740) located on the handle body (112) and controlling the operation of the angle adjustment motor (730).
[0143] The angle adjustment motor (730) is positioned on the hinge shaft (710) and rotates the hinge shaft (710) so that the angle of the main body housing (100) can be accurately positioned to the angle desired by the operator.
[0144] The operator can freely adjust the angle of the main body housing (100) during the procedure by operating the angle adjustment switch (740) located on the handle body (112) to rotate the hinge shaft (710) in a clockwise or counterclockwise direction with the angle adjustment motor (730).
[0145] In addition, another embodiment of the handpiece for ultrasonic therapy according to the present invention further includes a plurality of contact sensor units (750) located on the lower surface of the cartridge housing unit (200) to detect when the window unit (203) comes into contact with the skin, and an angle adjustment motor (730) is connected to the contact sensor unit (750) to receive a contact signal detected by the contact sensor unit (750) and adjusts the angle of the main body housing unit (100) so that the front surface of the window unit (203) can come into contact with the skin.
[0146] It should be noted that the contact sensor part (750) can be implemented in various modified forms as a known contact sensor that detects contact with the skin, and further detailed description is omitted.
[0147] A plurality of contact sensor units (750) are spaced apart along the perimeter of the window unit (203) to detect the contact state of the window unit (203), and when non-contact is detected by any one of the contact sensor units (750), the angle adjustment motor (730) receives a non-contact signal and adjusts the angle of the main body housing unit (100) so that the entire front surface of the window unit (203) can come into contact with the skin.
[0148] FIG. 9 is a cross-sectional view illustrating another embodiment of a handle hinge portion (700) in an ultrasonic treatment handpiece according to the present invention. Referring to FIG. 9, the handle hinge portion (700) may further include a clearance bushing portion (711) into which a hinge shaft portion (710) is inserted and which causes the hinge shaft portion (710) to rotate when a rotational force greater than a preset rotational force is applied.
[0149] The clearance bushing (711) allows the hinge shaft (710) to rotate when a rotational force greater than a preset rotational force is applied while the hinge shaft (710) is tightly coupled.
[0150] Additionally, the handle hinge portion (700) may further include a brake pad (760) that brakes the rotation of the hinge shaft portion (710), and a brake operating knob portion (770) that presses the hinge shaft portion (710) with the brake pad (760).
[0151] The brake operating knob portion (770) may include a knob rotation axis member (771) positioned through the hinge shaft portion (710), a first rotation knob (772) and a second rotation knob (773) positioned at each end of the knob rotation axis member (771), a pressure member (774) that is screw-coupled through the knob rotation axis member (771) and moves forward or backward by the rotation of the knob rotation axis member (771) to apply pressure to or release pressure on the brake pad (760), and a knob handle portion (775) positioned to protrude from the first rotation knob (772).
[0152] When the knob handle portion (775) is held and the knob rotation axis member (771) is rotated in one direction, the pressure member (774) presses the brake pad (760) to more firmly fix the angle of the main body housing portion (100).
[0153] Then, by holding the knob handle (775) and rotating the knob rotation axis member (771) in the opposite direction, the pressure member (774) releases the state of pressing the brake pad (760) and applies a rotational force greater than the preset rotational force to rotate the main body housing part (100) around the hinge axis part (710) so that the angle of the main body housing part (100) can be adjusted.
[0154]
[0155] The present invention can improve treatment performance by applying energy uniformly and evenly to a treatment area by planar shifting the focus of the ultrasound at a uniform depth within the skin, and by forming the focus of the ultrasound into a circle with a constant radius at a uniform depth within the skin so that energy is applied uniformly and evenly within the radius.
[0156] In addition, the present invention enables ultrasound treatment of localized areas of a patient's skin, such as under the eyes, by simplifying the structure that moves the focus of ultrasound generated from the ultrasound transducer in a circular motion on the same plane, thereby miniaturizing the size of the handpiece for ultrasound treatment.
[0157]
[0158] The present invention is not limited to the embodiments described above, but can be implemented with various modifications within the scope that does not deviate from the gist of the invention, and such modifications are included in the composition of the present invention.
Claims
DEPCT6618 / 08 / 25651. The therapeutic ultrasound generator consists of: a cartridge enclosure unit; an ultrasonic transducer unit positioned within the cartridge enclosure and tilted in the direction of the central axis of rotation, thus generating ultrasonic waves in the tilted direction; a tilting block unit positioned within the cartridge enclosure, with a tilted surface on its lower surface, supporting the upper surface of the ultrasonic transducer unit, thus positioning the ultrasonic transducer unit tilted in the direction of the central axis of rotation; and a rotating motor built to rotate the tilting block unit.2.The ultrasound generating device of Patent 1, in which the ball joint unit to which the ultrasonic transducer unit is rotatably attached, is positioned by protruding onto the center of the tilting block unit; multiple ball support components are constructed to rotate while supporting the upper surface of the ultrasonic transducer unit, which is positioned by protruding onto the lower surface of the tilting block unit; and the ultrasonic transducer unit is attached to the ball body of the ball joint unit, and the upper surface of the ultrasonic transducer unit is supported while being connected to multiple ball support components, thus the ultrasonic transducer unit is positioned at an angle.
3. The ultrasound generating device of Patent 1, further incorporated with a torque rod component, one end of which is connected to the ultrasonic transducer unit and the second end of which is connected to the cartridge enclosure unit. 4.The therapeutic ultrasound generator of Patent 3, in which the torsion rod component is incorporated: a first attachment unit attached to the ultrasonic transducer unit, a second attachment unit attached to the inner surface of the cartridge enclosure unit, and a spring unit with opposite ends of that, respectively, connected to the first and second attachment units; the spring unit absorbs shock through torsional elasticity.
5. The therapeutic ultrasound generator of Patent 4, in which the spring unit is formed such that the spring unit has at least one bent or curved unit.
6. The therapeutic ultrasound generator of Patent 1, in which the ultrasonic transducer unit is created to be continuously tilted in all directions 360 degrees along the central axis of rotation, so that the focus of the ultrasonic wave generated from the ultrasonic transducer unit is moved so that the focus is formed in a circular shape on the same plane. 7.The handle for ultrasound operation comprises: the ultrasonic transducer unit, the cartridge housing unit in which the ultrasonic transducer unit is positioned, and the main body housing unit to which the cartridge housing unit is detachable.
8. The handle of claim 7, which is further incorporated, comprises: a tilting block unit positioned in the cartridge housing unit, with a tilted surface on its bottom surface, and supporting the top surface of the ultrasonic transducer unit, thus positioning the ultrasonic transducer unit tilted in the direction of the central axis of rotation, and a rotating motor built in to rotate the tilting block unit in which the ultrasonic transducer unit is tilted in the direction of the central axis of rotation, thus generating ultrasonic waves in the tilted direction. 9.The handle of the 8th claim, to which the ball joint unit to which the ultrasonic transducer unit is rotatably attached, is positioned by protruding onto the center of the tilting block unit; more than one ball support component is constructed to rotate while supporting the upper surface of the ultrasonic transducer unit, which is positioned by protruding onto the lower surface of the tilting block unit; and the ultrasonic transducer unit is attached to the ball body of the ball joint unit, and the upper surface of the ultrasonic transducer unit is supported while being connected to more than one ball support component, thus the ultrasonic transducer unit is positioned at an angle.
10. The handle of the 8th claim is further incorporated with a torque rod component, one end of which is connected to the ultrasonic transducer unit and the second end of which is connected to the cartridge cover unit.11.The handle of claim 10, in which the torque rod components are assembled, consists of: a first mounting unit attached to the ultrasonic transducer unit; a second mounting unit attached to the inner surface of the cartridge cover unit; and a spring unit with opposite ends of that, respectively, connected to the first and second mounting units, the spring unit absorbing the shock through torsional elasticity.
12. The handle of claim 8, in which the ultrasonic transducer unit is continuously tilted in all directions 360 degrees along the central axis of rotation, so the focus of the ultrasonic wave generated by the ultrasonic transducer unit is moved, with the focus forming a circular shape on the same plane.13.The handle of claim 7, where the gripping unit capable of being grasped by the operator's hand is positioned by an extension on one side of the housing unit, and the handle unit is incorporated with: a gripping connecting unit bent to the upper part of the housing unit and positioned on the housing unit, and the handle itself bent from the gripping connecting unit and positioned downwards.
14. The handle of claim 7, where the gripping unit capable of being grasped by the operator's hand is positioned by an extension on one side of the housing unit, and the handle is incorporated with a hinged handle unit positioned between the housing unit and the gripping unit or between the dividing sections when the gripping unit is divided into two sections, the hinged handle unit is designed to rotate the housing unit around the hinge rod unit.
15. The handle of claim 14, where the hinged handle unit is incorporated with a rotation stopper unit designed to inhibit the rotation angle of the gripping unit rotating around the hinge rod unit.16.The handle of claim 15, in which the rotating stopper unit is incorporated, includes: more than one restraining groove unit positioned spaced apart on a surface along the outer circumference of the hinge rod unit and a protruding stopper unit extending to the surface along the inner circumference of the rod hole where the hinge rod unit is positioned and which is inserted into one of the more than one restraining groove units; the protruding stopper unit is constructed to be separated from one of the more than one restraining groove units and then moved to the next one of the more than one restraining groove units in the rotational direction when a rotational force equal to or greater than a preset rotational force is applied to the protruding stopper unit.
17. The handle of claim 14, in which the handle hinge unit is incorporated, includes: an angle adjustment motor constructed to adjust the angle of the housing unit by rotating the hinge rod unit and an angle adjustment switch unit positioned on the handle unit and constructed to control the operation of the angle adjustment motor.18.The handle of claim 17 incorporates more than one touch sensor unit positioned on the underside of the cartridge cover unit and designed to sense whether the window unit of the cartridge cover unit is in contact with the surface, where an angle adjustment motor is connected to more than one touch sensor unit, and receives the perceived touch signals at the more than one touch sensor unit and adjusts the angle of the cartridge cover unit, thus allowing the entire surface of the window unit to come into close contact with the surface.
19. The handle of claim 14 incorporates a hinge unit of the handle with a free-release bushing unit in which the hinge rod unit is inserted and designed to allow the hinge rod unit to rotate when a rotational force equal to or greater than a preset rotational force is applied to the free-release bushing unit.20.The handle of the 19th patent, in which the hinge unit of the handle is incorporated, includes: a brake pad designed to brake the rotation of the hinge unit and a brake actuator unit designed to press the hinge unit against the brake pad.-----------------------------------------------------------1. The integrated ultrasound generator for therapy includes: a cartridge enclosure unit, an ultrasonic transducer unit positioned in the cartridge enclosure and tilted in the direction of the central axis of rotation, thus designed to generate ultrasonic waves in the tilted direction; a tilting block unit positioned in the cartridge enclosure unit with a tilted surface on the bottom surface of it, and supporting the top surface of the ultrasonic transducer unit, thus positioning the ultrasonic transducer unit tilted in the direction of the central axis of rotation; and a rotational motor designed to rotate the tilting block unit.2.The ultrasound therapy device of Patent 1, in which the ball joint unit to which the ultrasonic transducer is rotated is positioned by protruding onto the center of the tilting block unit; multiple ball support components are constructed to rotate while supporting the upper surface of the ultrasonic transducer unit, which is positioned by protruding onto the lower surface of the tilting block unit; and the ultrasonic transducer unit is attached to the ball body of the ball joint unit, and the upper surface of the ultrasonic transducer unit is supported while being connected to multiple ball support components, thus the ultrasonic transducer unit is tilted.
3. The ultrasound therapy device of Patent 1, which is further incorporated with a torque rod component, one end of which is connected to the ultrasonic transducer unit and the second end of which is connected to the cartridge enclosure unit. 4.The therapeutic ultrasound generator of Patent 4, in which the torsion rod component is incorporated: a first attachment unit attached to the ultrasonic transducer unit, a second attachment unit attached to the inner surface of the cartridge enclosure unit, and a spring unit with opposite ends of that, respectively, connected to the first and second attachment units; the spring unit absorbs shock through torsional elasticity.
5. The therapeutic ultrasound generator of Patent 4, in which the spring unit is formed such that the spring unit has at least one bending or curving unit.
6. The therapeutic ultrasound generator of Patent 1, in which the ultrasonic transducer unit is continuously tilted in all directions 360 degrees along the central axis of rotation, so that the focus of the ultrasonic wave generated by the ultrasonic transducer unit is moved so that the focus is formed in a circular shape on the same plane. 7.The handle for ultrasound operation includes: the ultrasonic transducer unit, the cartridge housing unit in which the ultrasonic transducer unit is positioned, and the main body housing unit in which the cartridge housing unit is detachable.
8. The handle of patent 7 includes: a tilting block unit positioned in the cartridge housing unit, with a tilted surface on its bottom surface, supporting the top surface of the ultrasonic transducer unit, thus positioning the ultrasonic transducer unit tilted along the central axis of rotation, and a rotating motor built to rotate the tilting block unit in which the ultrasonic transducer unit is tilted along the central axis of rotation, thus generating ultrasonic waves in the tilted direction. 9.The handle of the 8th claim, to which the ball joint unit to which the ultrasonic transducer unit is rotatably attached, is positioned by protruding onto the center of the tilting block unit; more than one ball support component is constructed to rotate while supporting the upper surface of the ultrasonic transducer unit, which is positioned by protruding onto the lower surface of the tilting block unit; and the ultrasonic transducer unit is attached to the ball body of the ball joint unit, and the upper surface of the ultrasonic transducer unit is supported while being connected to more than one ball support component, thus the ultrasonic transducer unit is positioned at an angle.
10. The handle of the 8th claim is further incorporated with a torque rod component, one end of which is connected to the ultrasonic transducer unit and the second end of which is connected to the cartridge cover unit.11.The handle of claim 10, in which the impulse transporter components are assembled, consists of: a first mounting unit attached to the ultrasonic transducer unit; a second mounting unit attached to the inner surface of the cartridge housing unit; and a spring unit with opposite ends of that, respectively, connected to the first and second mounting units, the spring unit absorbing the shock through torsional elasticity.
12. The handle of claim 8, in which the ultrasonic transducer unit is continuously tilted in all directions 360 degrees along the central axis of rotation, so the focus of the ultrasonic wave generated by the ultrasonic transducer unit is moved, with the focus forming a circular shape on the same plane.13.The handle of claim 7, in which the gripping unit capable of being grasped by the operator's hand is positioned by an overhang on one side of the housing unit, and the handle unit is further incorporated with: a gripping connecting unit bent to the upper part of the housing unit and positioned on the housing unit, and the grip itself, which is curved off from the gripping connecting unit and positioned downwards.
14. The handle of claim 7, in which the gripping unit capable of being grasped by the operator's hand is positioned by an overhang on one side of the housing unit, and the handle is further incorporated with a hinged handle unit positioned between the housing unit and the gripping unit or between the dividing sections when the gripping unit is divided into two sections, the hinged handle unit is constructed to rotate the housing unit around the hinge rod unit.
15. The handle of claim 14, in which the hinged handle unit is incorporated with a rotation stopper unit constructed to inhibit the rotation angle of the gripping unit as it rotates around the hinge rod unit.16.The handle of claim 15, in which the rotating stopper unit is incorporated, includes: more than one restraining groove unit positioned spaced apart on a surface along the outer circumference of the hinge rod unit and a stopper extension unit extending to the surface along the inner circumference of the rod hole where the hinge rod unit is positioned and which is inserted into one of the more than one restraining groove units; the stopper extension unit is constructed to be separated from one of the more than one restraining groove units and then moved into one of the more than one restraining groove units in the rotational direction when a rotational force equal to or greater than a preset rotational force is applied to the stopper extension unit.
17. The handle of claim 14, in which the handle hinge unit is incorporated, includes: an angle adjustment motor constructed to adjust the angle of the housing unit by rotating the hinge rod unit and an angle adjustment switch unit positioned on the handle unit and constructed to control the operation of the angle adjustment motor.18.The handle of claim 17 incorporates more than one touch sensor unit positioned on the underside of the cartridge cover unit and designed to sense whether the window unit of the cartridge cover unit is in contact with the surface, where an angle adjustment motor is connected to more than one touch sensor unit, and receives the perceived touch signals at the more than one touch sensor unit and adjusts the angle of the cartridge cover unit, thus allowing the entire surface of the window unit to come into close contact with the surface.
19. The handle of claim 14 incorporates a hinge unit of the handle with a free-release bushing unit in which the hinge rod unit is inserted and designed to allow the hinge rod unit to rotate when a rotational force equal to or greater than a preset rotational force is applied to the free-release bushing unit. 20.The handle of the 19th claim, in which the hinge unit of the handle is incorporated, includes: a brake pad designed to brake the rotation of the hinge unit and a brake actuator unit designed to press the hinge unit against the brake pad.