阅读说明：本技术 一种方便对耳道进行扩张支撑的耳鼻喉科扩张装置 (Ear-nose-throat department expansion device convenient for expanding and supporting ear canal ) 是由 刘毅 唐牵艺 王玫 于超 马进 任凤伟 周娇蕾 海云 李江波 邹鹏 何雪娇 龚 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种方便对耳道进行扩张支撑的耳鼻喉科扩张装置,包括主动杆,所述主动杆的上端外侧固定连接有操控转盘,所述主动杆的下端设置有对称螺纹；通过在扩张板的两侧固定连接的侧吊耳,在限位连接环的外侧对称固定连接有承接吊耳,侧吊耳与承接吊耳的相对内侧固定连接有弹簧罩,在弹簧罩的内部缓冲装置,当扩展机构开始时,缓冲机构中的缓冲弹簧会加长或者缩短,这样可以有效减少扩张的应力,避免扩张机构伤及耳道,在侧吊耳和承接吊耳的一侧固定连接有杆套和圆杆,当扩张机构带着扩张板回到原位时,杆套则会套入圆杆,这样可以当限位使用,防止收缩过度,这样可以达到保护效果。(The invention discloses an ear-nose-throat department expansion device convenient for expanding and supporting an ear canal, which comprises a driving rod, wherein the outer side of the upper end of the driving rod is fixedly connected with a control turntable, and the lower end of the driving rod is provided with symmetrical threads; through the both sides fixed connection's at the expansion plate side lug, the lug is accepted to the outside symmetry fixedly connected with of spacing go-between, side lug and the relative inboard fixedly connected with spring housing of accepting the lug, at the inside buffer of spring housing, when expanding mechanism begins, buffer spring among the buffer gear can lengthen or shorten, can effectively reduce the stress of expansion like this, avoid expanding mechanism to hinder and reach the duct, at side lug and one side fixedly connected with rod cover and the round bar of accepting the lug, when expanding mechanism takes the expansion plate to get back to the normal position, the rod cover then can embolia the round bar, can work as spacing use like this, prevent that the shrink is excessive, can reach the protecting effect like this.)

1. The utility model provides a convenient otolaryngology branch of academic or vocational study expansion device that expands support to the ear canal, includes initiative pole (1), its characterized in that: the outer side of the upper end of the driving rod (1) is fixedly connected with a control turntable (2), the lower end of the driving rod (1) is provided with symmetrical threads, a ratchet wheel housing (3) is arranged below the control turntable (2), a ratchet wheel device is arranged inside the ratchet wheel housing (3), the ratchet wheel housing (3) is rotatably connected to the outer side of the driving rod (1), the bottom end of the ratchet wheel housing (3) is fixedly connected with a protective housing (19), the outer side of the protective housing (19) is symmetrically and fixedly connected with a handle (5), a connecting rod (20) is arranged inside the handle (5), the connecting rod (20) is fixedly connected to the bottom end of the ratchet wheel housing (3), the bottom end of the connecting rod (20) is fixedly connected with a first fixing ring (8), the bottom end of the first fixing ring (8) is fixedly connected with an expansion protection housing (7), the inside of expansion protection housing (7) is provided with expanding mechanism, the solid fixed ring of other end fixedly connected with second (9) of expansion protection housing (7), drive rod (1) is rotated and is connected in the centre of the solid fixed ring of first (8) and the solid fixed ring of second (9), the other end fixedly connected with thread bush (10) of the solid fixed ring of second (9), the other end fixedly connected with of thread bush (10) advances ear (11).

2. An otorhinolaryngological expansion device for facilitating expansion support of an ear canal as claimed in claim 1, wherein: ratchet device includes ratchet (12), ratchet dog (14), fixed plate (15), ratchet slide bar (16), baffle (33) and spring, the outside block of ratchet (12) is connected with ratchet dog (14), the centre sliding connection of ratchet dog (14) has ratchet slide bar (16), the bottom fixedly connected with fixed plate (15) of ratchet dog (14), the top fixedly connected with baffle (33) of fixed plate (15), one side fixedly connected with spring of baffle (33), ratchet (12) fixed connection is in the outside of driving lever (1), ratchet slide bar (16) fixed connection is in the inside bottom of ratchet housing (3).

3. An otorhinolaryngological expansion device for facilitating expansion support of an ear canal as claimed in claim 2, wherein: the top fixedly connected with of ratchet dog (14) accepts pole (13), accept pole (13) sliding connection is in the outside of ratchet slide bar (16), the round hole has been seted up on the top of ratchet housing (3), accept pole (13) sliding connection is in the inboard of round hole, the bottom fixedly connected with of fixed plate (15) resumes spring (17) and telescopic link (18), resume spring (17) and telescopic link (18) fixed connection is in the inside bottom of ratchet housing (3).

4. An otorhinolaryngological expansion device for facilitating expansion support of an ear canal as claimed in claim 3, wherein: expansion mechanism includes duct contact pad (21), expansion board (22), first dwang (24), second dwang (25), first screw ring (27) and second screw ring (28), the outside symmetry of first screw ring (27) is rotated and is connected with first dwang (24), the outside symmetry of second screw ring (28) is rotated and is connected with second dwang (25), first dwang (24) is rotated with the one end of second dwang (25) and is connected, the equal fixedly connected with expansion board (22) in one side of second dwang (25), the outside of expansion board (22) all is provided with duct contact pad (21).

5. An otorhinolaryngological expansion device to facilitate expansion support of an ear canal according to claim 4 wherein: the utility model discloses a spring cover, including drive rod (1), first threaded ring (27) and second threaded ring (28), the equal threaded connection of both sides symmetry fixedly connected with side lug (23) of expansion plate (22), be provided with spacing go-between ring (34) between first threaded ring (27) and second threaded ring (28), lug (29) are accepted to the outside symmetry fixedly connected with of spacing go-between ring (34), side lug (23) and accept equal fixedly connected with spring cover (26) between lug (29), the inside of spring cover (26) is provided with buffer.

6. An otorhinolaryngological expansion device to facilitate expansion support of an ear canal according to claim 5 wherein: the buffer device comprises a rod sleeve (30), a round rod (31) and a buffer spring (32), wherein the rod sleeve (30) is fixedly connected to one side of the side lifting lug (23), the round rod (31) is fixedly connected to one side of the bearing lifting lug (29), and the buffer spring (32) is fixedly connected to the inner sides of the side lifting lug (23) and the bearing lifting lug (29).

7. An otorhinolaryngological expansion device to facilitate expansion support of an ear canal according to claim 5 wherein: the limiting connecting ring (34) is fixedly connected to the outer side of the driving rod (1), and the spring cover (26) has telescopic performance.

8. An otorhinolaryngological expansion device for facilitating expansion support of an ear canal as claimed in claim 1, wherein: the bottom of handle (5) all is provided with LED light (6), it sets up to rubber materials to advance ear head (11), the one end of advancing ear head (11) sets up to sharp arc.

9. An otorhinolaryngological expansion device to facilitate expansion support of an ear canal according to claim 4 wherein: the ear canal contact pad (21) is provided in a rubber material, and the ear canal contact pad (21) and the expansion plate (22) are provided in an arc shape.

10. An otorhinolaryngological expansion device for facilitating expansion support of an ear canal as claimed in claim 3, wherein: the top end of the adapting rod (13) is fixedly connected with a ratchet release button (4), the ratchet release button (4) is arranged to be rectangular, and the bottom end of the adapting rod (13) is arranged to be in a straight line shape.

Technical Field

The invention belongs to the technical field of medical devices, and particularly relates to an ear-nose-throat expansion device capable of conveniently expanding and supporting an ear canal.

Background

The otolaryngology branch of academic or vocational study includes parts such as ear, nose, larynx, is some parts that the human body is more easy to be attacked by illness, also is the disease of the most easy puzzlement and influence people's normal work and life simultaneously, and medical personnel are when examining patient's duct, in order to observe the duct condition, need expand the support to the duct usually.

However, in the current ear canal expansion, most of the ear canals are expanded by using tweezers, and then the tweezers are operated by doctors, so that the tweezers easily hurt the ear canals of the patients, and the expanded size is inconvenient to fix, and therefore, an ear-nose-throat expansion device which is convenient for expanding and supporting the ear canals is needed.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the existing defects, and provide an ear-nose-throat expansion device which is convenient for expanding and supporting the ear canal, so as to solve the problems that most of the devices proposed in the background art use tweezers to expand the ear of a patient and then are operated by a doctor, so that the tweezers easily hurt the ear canal of the patient and are inconvenient for fixing the expanded size.

In order to achieve the purpose, the invention provides the following technical scheme: an otolaryngology expansion device convenient for expanding and supporting an ear canal comprises a driving rod, wherein a control rotary disc is fixedly connected to the outer side of the upper end of the driving rod, symmetrical threads are arranged at the lower end of the driving rod, a ratchet housing is arranged below the control rotary disc, a ratchet device is arranged inside the ratchet housing, the ratchet housing is rotatably connected to the outer side of the driving rod, a protective housing is fixedly connected to the bottom end of the ratchet housing, a handle is symmetrically and fixedly connected to the outer side of the protective housing, a connecting rod is arranged inside the handle and fixedly connected to the bottom end of the ratchet housing, a first fixing ring is fixedly connected to the bottom end of the connecting rod, an expansion protective housing is fixedly connected to the bottom end of the first fixing ring, an expansion mechanism is arranged inside the expansion protective housing, and a second fixing ring is fixedly connected to the other end of the expansion protective housing, the driving rod is rotatably connected between the first fixing ring and the second fixing ring, the other end of the second fixing ring is fixedly connected with a threaded sleeve, and the other end of the threaded sleeve is fixedly connected with an ear inlet head.

Preferably, the ratchet device comprises a ratchet wheel, a ratchet wheel stop block, a fixing plate, a ratchet wheel sliding rod, a baffle and a spring, the ratchet wheel is clamped and connected with the ratchet wheel stop block, the ratchet wheel sliding rod is connected in the middle of the ratchet wheel stop block in a sliding mode, the fixing plate is fixedly connected to the bottom end of the ratchet wheel stop block, the baffle is fixedly connected to the top end of the fixing plate, the spring is fixedly connected to one side of the baffle, the ratchet wheel is fixedly connected to the outer side of the driving rod, and the ratchet wheel sliding rod is fixedly connected to the inner bottom end of the ratchet wheel housing.

Preferably, the top end of the ratchet stop block is fixedly connected with a carrying rod, the carrying rod is connected to the outer side of the ratchet sliding rod in a sliding mode, a round hole is formed in the top end of the ratchet housing, the carrying rod is connected to the inner side of the round hole in a sliding mode, the bottom end of the fixing plate is fixedly connected with a recovery spring and a telescopic rod, and the recovery spring and the telescopic rod are fixedly connected to the inner bottom end of the ratchet housing.

Preferably, the expansion mechanism includes ear canal contact pad, expansion plate, first dwang, second dwang, first screw thread ring and second screw thread ring, the outside symmetry of first screw thread ring is rotated and is connected with first dwang, the outside symmetry of second screw thread ring is rotated and is connected with the second dwang, first dwang is rotated with the one end of second dwang and is connected, the equal fixedly connected with expansion plate in one side of second dwang, the outside of expansion plate all is provided with the ear canal contact pad.

Preferably, the first threaded ring and the second threaded ring are both in threaded connection with the outer side of the driving rod, the expansion plate is symmetrically and fixedly connected with side lifting lugs, a limiting connecting ring is arranged between the first threaded ring and the second threaded ring, the lifting lugs are symmetrically and fixedly connected with the outer side of the limiting connecting ring, spring covers are fixedly connected between the side lifting lugs and the lifting lugs, and a buffer device is arranged inside the spring covers.

Preferably, the buffer device comprises a rod sleeve, a round rod and a buffer spring, the rod sleeve is fixedly connected to one side of the side lifting lug, the round rod is fixedly connected to one side of the bearing lifting lug, and the buffer spring is fixedly connected to the opposite inner sides of the side lifting lug and the bearing lifting lug.

Preferably, the limiting connecting ring is fixedly connected to the outer side of the driving rod, and the spring cover has telescopic performance.

Preferably, the bottom of handle all is provided with the LED light, it sets up to rubber materials to advance the ear head, it sets up to sharp arc to advance the one end of ear head.

Preferably, the ear canal contact pad is provided in a rubber material, and the ear canal contact pad and the expansion plate are provided in an arc shape.

Preferably, the top end of the carrying rod is fixedly connected with a ratchet release button, the ratchet release button is rectangular, and the bottom end of the carrying rod is in a straight line shape.

Compared with the prior art, the invention provides the ear-nose-throat expansion device which can conveniently expand and support the auditory canal, and the ear-nose-throat expansion device has the following beneficial effects:

1. according to the invention, the ratchet device is arranged in the ratchet housing, the control rotary disc is rotated, the control rotary disc can drive the driving rod to start rotating, then the driving rod can drive the ratchet fixedly connected with the outer side of the upper end to start rotating, the ratchet stop block is connected with the outer side of the ratchet in a clamping manner, the ratchet stop block can be clamped in each tooth of the ratchet, the bottom end of the ratchet stop block is fixedly connected with the fixing plate, one side of the top end of the fixing plate is fixedly connected with the baffle plate, the spring is fixedly connected between the baffle plate and the ratchet stop block, and when the ratchet stop block is shifted once, the ratchet can return to the original position through the spring, so that the ratchet can be clamped, the rotation of the driving rod can be prevented, and the safety effect can be achieved;

2. according to the ratchet wheel device, the ratchet wheel housing is arranged on the outer side of the secondary driving rod, the top end of the ratchet wheel housing is provided with a round hole, the inner side of the round hole is connected with the bearing rod in a sliding mode, the bottom end of the bearing rod is arranged in a straight shape, the bearing rod is prevented from sliding out of the round hole, the bearing rod is fixedly connected with the ratchet wheel stop block in the ratchet wheel device, the ratchet wheel stop block is fixedly connected with the fixed plate, the bottom end of the fixed plate is fixedly connected with the recovery spring and the telescopic rod, the bearing rod and the ratchet wheel stop block are both connected to the outer side of the ratchet wheel sliding rod in a sliding mode, the ratchet wheel release button is pressed down, the ratchet wheel stop block can follow and descend, the recovery spring and the telescopic rod are then compressed down until the ratchet wheel and the ratchet wheel stop block are separated from a clamping state, and therefore the control turntable can be rotated reversely, the driving rod can be rotated reversely, and control operation can be facilitated;

3. the invention arranges symmetrical screw thread outside the lower end of the active rod by the expanding mechanism arranged in the expanding protective cover shell, the outer side of the driving rod is in threaded connection with a first threaded ring and a second threaded ring, the intersection of the symmetrical threads is fixedly connected with a limiting connecting ring, when the driving rod starts to rotate, the first threaded ring and the second threaded ring start to move close to or away from each other, a first rotating rod is symmetrically and rotatably connected with the outer side of the second threaded ring, a second rotating rod is symmetrically and rotatably connected with the outer side of the first threaded ring, the other ends of the first rotating rod and the second rotating rod are rotatably connected, an expansion plate is fixedly connected with one side of the second rotating rod, so that the expansion plate can be driven to expand or contract, the expansion plate is arc-shaped, so that the expansion plate can be better attached to the auditory canal, and the effect of expanding the auditory canal is achieved;

4. according to the invention, the side lifting lugs are fixedly connected with the two sides of the expansion plate, the bearing lifting lugs are symmetrically and fixedly connected with the outer side of the limiting connecting ring, the spring cover is fixedly connected with the inner sides of the side lifting lugs and the bearing lifting lugs, and the buffer device is arranged in the spring cover;

5. according to the invention, the LED illuminating lamp is arranged at the bottom end of the handle, when the expansion protection cover shell enters the auditory canal of a patient to start working, the realization in the auditory canal is possibly insufficient, which is the condition that the LED illuminating lamp can be turned on to look at the inside, the bottom end of the threaded sleeve is fixedly connected with the ear inlet head which is made of rubber materials, so that the auditory canal is not damaged when entering the auditory canal, the external side of the expansion plate is also provided with the auditory canal contact pad which is also made of rubber materials, and the auditory canal is not damaged when being expanded.

The device has the advantages that the structure is scientific and reasonable, the use is safe and convenient, and great help is provided for people.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:

FIG. 1 is a schematic perspective view of an ear-nose-throat dilator for conveniently dilating and supporting an ear canal according to the present invention;

FIG. 2 is a schematic axial view of the otolaryngological expansion device of the present invention for facilitating the expansion and support of the ear canal;

FIG. 3 is a schematic perspective view of a ratchet device of an ear-nose-throat dilator for conveniently dilating and supporting an ear canal according to the present invention;

FIG. 4 is an enlarged schematic view of A in FIG. 3;

FIG. 5 is a schematic perspective view of a protective shell of an ear-nose-throat dilator for facilitating the dilation and support of an ear canal according to the present invention;

FIG. 6 is a schematic view of the internal three-dimensional structure of the expansion protection housing of the expansion device for the ear-nose-throat department, which is convenient for expanding and supporting the ear canal, according to the invention;

FIG. 7 is a schematic view of the internal three-dimensional structure of the spring cover in the expanding mechanism of the ear-nose-throat expanding device for conveniently expanding and supporting the ear canal according to the invention;

FIG. 8 is an enlarged perspective view of B in FIG. 6;

in the figure: the device comprises a driving rod 1, a control rotary disc 2, a ratchet wheel housing 3, a ratchet wheel release button 4, a handle 5, an LED illuminating lamp 6, an expansion protection housing 7, a first fixing ring 8, a second fixing ring 9, a threaded sleeve 10, an ear inlet head 11, a ratchet wheel 12, a carrying rod 13, a ratchet wheel stop 14, a fixing plate 15, a ratchet wheel sliding rod 16, a restoring spring 17, an expansion rod 18, a protective shell 19, a connecting rod 20, an ear canal contact pad 21, an expansion plate 22, a side lifting lug 23, a first rotating rod 24, a second rotating rod 25, a spring cover 26, a first threaded ring 27, a second threaded ring 28, a carrying lifting lug 29, a rod sleeve 30, a round rod 31, a buffer spring 32, a baffle 33 and a limit connecting ring 34.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the present invention provides a technical solution: an otolaryngological expansion device convenient for expanding and supporting an ear canal comprises a driving rod 1, wherein the outer side of the upper end of the driving rod 1 is fixedly connected with an operation control rotary disc 2, the lower end of the driving rod 1 is provided with symmetrical threads, a ratchet wheel housing 3 is arranged below the operation control rotary disc 2, a ratchet wheel device is arranged inside the ratchet wheel housing 3, the ratchet wheel housing 3 is rotatably connected to the outer side of the driving rod 1, the bottom end of the ratchet wheel housing 3 is fixedly connected with a protective housing 19, the outer side of the protective housing 19 is symmetrically and fixedly connected with a handle 5, a connecting rod 20 is arranged inside the handle 5, the connecting rod 20 is fixedly connected to the bottom end of the ratchet wheel housing 3, the bottom end of the connecting rod 20 is fixedly connected with a first fixing ring 8, the bottom end of the first fixing ring 8 is fixedly connected with an expansion protection housing 7, an expansion mechanism is arranged inside the expansion protection housing 7, and the other end of the expansion protection housing 7 is fixedly connected with a second fixing ring 9, the driving rod 1 is rotatably connected between the first fixing ring 8 and the second fixing ring 9, the other end of the second fixing ring 9 is fixedly connected with a threaded sleeve 10, the other end of the threaded sleeve 10 is fixedly connected with an inlet lug 11, and the expansion mechanism can better run due to the arrangement of symmetrical threads.

In the present invention, preferably, the ratchet device includes a ratchet wheel 12, a ratchet wheel stopper 14, a fixing plate 15, a ratchet wheel slide rod 16, a baffle plate 33 and a spring, the ratchet wheel stopper 14 is connected to the outer side of the ratchet wheel 12 in a snap-fit manner, the ratchet wheel slide rod 16 is connected to the middle of the ratchet wheel stopper 14 in a sliding manner, the fixing plate 15 is fixedly connected to the bottom end of the ratchet wheel stopper 14, the baffle plate 33 is fixedly connected to the top end of the fixing plate 15, the spring is fixedly connected to one side of the baffle plate 33, the ratchet wheel 12 is fixedly connected to the outer side of the driving rod 1, the ratchet wheel slide rod 16 is fixedly connected to the inner bottom end of the ratchet wheel housing 3, and the ratchet device can be used as a safety device of an expanding mechanism.

In the present invention, preferably, the top end of the ratchet stopper 14 is fixedly connected with the receiving rod 13, the receiving rod 13 is slidably connected to the outer side of the ratchet slide rod 16, the top end of the ratchet housing 3 is provided with a circular hole, the receiving rod 13 is slidably connected to the inner side of the circular hole, the bottom end of the fixing plate 15 is fixedly connected with the restoring spring 17 and the telescopic rod 18, and the restoring spring 17 and the telescopic rod 18 are fixedly connected to the inner bottom end of the ratchet housing 3.

In the present invention, preferably, the expansion mechanism includes an ear canal contact pad 21, an expansion plate 22, a first rotation rod 24, a second rotation rod 25, a first threaded ring 27 and a second threaded ring 28, the outer side of the first threaded ring 27 is symmetrically and rotatably connected with the first rotation rod 24, the outer side of the second threaded ring 28 is symmetrically and rotatably connected with the second rotation rod 25, the first rotation rod 24 is rotatably connected with one end of the second rotation rod 25, one side of the second rotation rod 25 is fixedly connected with the expansion plate 22, the outer side of the expansion plate 22 is provided with the ear canal contact pad 21, and the expansion mechanism can expand the ear canal.

In the present invention, preferably, the first threaded ring 27 and the second threaded ring 28 are both threadedly connected to the outer side of the driving rod 1, the side lifting lugs 23 are symmetrically and fixedly connected to both sides of the expansion plate 22, the limit connecting ring 34 is disposed between the first threaded ring 27 and the second threaded ring 28, the receiving lifting lugs 29 are symmetrically and fixedly connected to the outer side of the limit connecting ring 34, the spring covers 26 are fixedly connected between the side lifting lugs 23 and the receiving lifting lugs 29, and the buffer devices are disposed inside the spring covers 26.

In the present invention, preferably, the buffering device includes a rod sleeve 30, a round rod 31 and a buffering spring 32, the rod sleeve 30 is fixedly connected to one side of the side lifting lug 23, the round rod 31 is fixedly connected to one side of the receiving lifting lug 29, and the buffering spring 32 is fixedly connected to the opposite inner sides of the side lifting lug 23 and the receiving lifting lug 29, so that the buffering device can eliminate the stress of expansion and increase the ear canal protection effect.

In the invention, preferably, the limiting connecting ring 34 is fixedly connected to the outer side of the driving rod 1, the spring cover 26 has a telescopic performance, so that the spring cover 26 can change along with the change of the buffer spring 32, the bottom ends of the handles 5 are all provided with the LED illuminating lamps 6, the ear inlets 11 are made of rubber materials, one ends of the ear inlets 11 are arranged in a sharp arc shape, the sharp arc shape is used for better entering the auditory canal, the arranged LED illuminating lamps 6 can be turned on under the condition of insufficient light in the auditory canal, and the operation of a doctor is facilitated.

In the present invention, it is preferable that the ear canal contact pad 21 is formed of a rubber material, the ear canal contact pad 21 and the expansion plate 22 are formed in an arc shape, and the rubber material is soft to protect the ear canal. The arc is for fitting the auditory canal profile more, and the top fixedly connected with ratchet release button 4 of adapting rod 13, and ratchet release button 4 sets up to the rectangle, and the bottom of adapting rod 13 sets up to the I-shaped, prevents that adapting rod 13 from following the inboard roll-off of round hole or pushing down too deeply and can't take out.

The working principle and the using process of the invention are as follows: when the ear canal dilator is used, a doctor holds the handle 5, then inserts one end of the ear canal inlet 11 into the ear canal of a patient, the ear canal inlet 11 is made of rubber materials, so that the ear canal cannot be damaged when entering the ear canal, the inside of the ear canal is possibly insufficient, at the moment, the LED illuminating lamp 6 can be turned on to look after the inside of the ear canal, then the ear canal expansion is started, the expansion protective housing 7 is arranged on the outer side of the driving rod 1, the expansion mechanism is arranged inside the expansion protective housing 7, the outer side of the lower end of the driving rod 1 is provided with symmetrical threads, the outer side of the driving rod 1 is in threaded connection with a first threaded ring 27 and a second threaded ring 28, a limit connecting ring 34 is fixedly connected at the intersection of the symmetrical threads, the control rotary disc 2 is rotated, the control rotary disc 2 starts to drive the driving rod 1 to rotate, when the driving rod 1 starts to rotate, the first threaded ring 27 and the second threaded ring 28 start to move close to or away from each other, the outer side of the second threaded ring 28 is symmetrically and rotatably connected with a first rotating rod 24, the outer side of the first threaded ring 27 is symmetrically and rotatably connected with a second rotating rod 25, the other ends of the first rotating rod 24 and the second rotating rod 25 are rotatably connected, one side of the second rotating rod 25 is fixedly connected with an expansion plate 22, so that the expansion plate 22 can be driven to expand or contract, the expansion plate 22 is arc-shaped and can be better attached to the auditory canal, a receiving lifting lug 29 is symmetrically and fixedly connected to the outer side of the limiting connecting ring 34 through a side lifting lug 23 fixedly connected to two sides of the expansion plate 22, a spring cover 26 is fixedly connected to the opposite inner side of the side lifting lug 23 and the receiving lifting lug 29, an internal buffer device of the spring cover 26 is arranged, when the expansion mechanism starts, a buffer spring 32 in the buffer mechanism can be lengthened or shortened, so that the stress of expansion can be effectively reduced, and the auditory canal can be prevented from being injured by the expansion mechanism, a rod sleeve 30 and a round rod 31 are fixedly connected to one side of the side lifting lug 23 and one side of the bearing lifting lug 29, when the expansion mechanism drives the expansion plate 22 to return to the original position, the rod sleeve 30 can be sleeved into the round rod 31, so that the expansion mechanism can be used as a limit, the ear canal contact pad 21 is arranged on the outer side of the expansion plate 22, the ear canal contact pad 21 is made of rubber materials, so that the ear canal can be expanded without being damaged, then the ratchet wheel device arranged in the ratchet wheel housing 3 is used, the control rotary disc 2 can drive the driving rod 1 to rotate by rotating the control rotary disc 2, then the driving rod 1 can drive the ratchet wheel 12 fixedly connected with the outer side of the upper end to rotate, the ratchet wheel block 14 is clamped and connected to the outer side of the ratchet wheel 12, the ratchet wheel block 14 can be clamped in each tooth of the ratchet wheel 12, the fixing plate 15 is fixedly connected to the bottom end of the ratchet wheel block 14, and a baffle plate 33 is fixedly connected to one side of the top end of the fixing plate 15, a spring is fixedly connected between the baffle 33 and the ratchet wheel stop 14, when the ratchet wheel stop 14 is shifted, the ratchet wheel 12 can be clamped by the spring to return to the original position, the rotation of the driving rod 1 can be prevented, and thus, the safety effect can be achieved, if the expansion plate 22 needs to be returned to the original position, a round hole is arranged at the top end of the adapting rod 13, the adapting rod 13 is connected to the inner side of the round hole in a sliding manner, the ratchet wheel release button 4 is fixedly connected to the top end of the adapting rod 13, the bottom end of the adapting rod 13 is arranged in a straight line shape, the adapting rod 13 is prevented from sliding out of the round hole, the adapting rod 13 is fixedly connected with the ratchet wheel stop 14 in the ratchet wheel device, the ratchet wheel stop 14 is fixedly connected with the fixed plate 15, the recovery spring 17 and the telescopic rod 18 are fixedly connected to the bottom end of the fixed plate 15, and both the adapting rod 13 and the ratchet wheel stop 14 are slidably connected to the outer side of the ratchet wheel sliding rod 16, and the ratchet wheel release button 4 is pressed, the ratchet dog 14 can follow the decline, and resume spring 17 and telescopic link 18 and follow the compression down, until ratchet 12 and ratchet dog 14 break away from card and state, just so can the antiport control carousel 2, and then make drive lever 1 antiport, just can make expansion plate 22 get back to the normal position, can reach the control operation of being convenient for like this, also the effect that the doctor of being convenient for used.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.