Bone conduction hearing aid glasses

Abstract

SOLUTION: A bone conduction hearing aid glasses include a glass mechanism 1. The glass mechanism has a connection mechanism fixed at a center of both rear ends; the bone conduction temple mechanism 3 is fixedly connected to each of the two ends of the connecting mechanism; the bone conduction temple mechanism is fitted with a rubber ring 5 on an outer circumference of the middle and rear parts; a rubber hook 6 is fixedly connected to a bottom end of each rubber ring; the bone conduction temple mechanism has a connecting snap 7 fixed to a rear end of the mechanism; and the rear ends of the connecting snaps are both fixedly attached to front ends of anti-fall-off mechanisms 4.EFFECT: By installing a bone conduction module inside a bone conduction temple mechanism, patients with hearing impairment and myopia can achieve vision correction and hearing correction at the same time, a fall prevention mechanism that can be automatically retrieved through a connecting snap is connected to a first connecting hole at a rear end of a temple body. When bone conduction glasses are required, the glasses are prevented from falling off and being damaged due to vigorous exercise by the patient.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the technical field of hearing aid devices, and in particular to bone conduction hearing aid glasses. [Background technology]

[0002] Bone conduction is a sound transmission method that converts sound into mechanical vibrations of different frequencies and transmits sound waves through the human skull, bony labyrinth, inner ear lymph, organ of Corti, and auditory pathway. Compared to sound transmission methods that generate sound waves through a diaphragm, bone conduction eliminates many steps in sound transmission, restoring clear sound in noisy environments, and preventing sound waves from spreading into the air and affecting others.

[0003] According to the latest data report, the number of people with hearing loss or hearing impairment in China has reached 27.8 million, and these people with hearing loss or hearing impairment are greatly affected in their daily lives. With the maturity of bone conduction technology, more and more people with hearing loss or hearing impairment will wear hearing aids with bone conduction technology, helping the hearing loss or hearing impaired people to hear sounds again, so as to enable the hearing loss or hearing impaired people to live and communicate normally.

[0004] However, since the bone conduction earphone needs to be fixed firmly to the ear of the person with hearing loss or hearing impairment, it is generally provided with a hook, which is hung on the ear of the person with hearing loss or hearing impairment, or is provided in a semicircular band shape and hung on the upper end of the patient's ear, so as to prevent the bone conduction hearing aid from falling off and damaging the bone conduction earphone when the person with hearing loss or hearing impairment is exercising. The bone conduction smart hearing aid disclosed in the granted Chinese patent publication No. CN111818435B is a semicircular band shape that is worn on both ears of the patient, and for example, the wireless bone conduction hearing aid disclosed in the granted Chinese patent publication No. CN209089232U is a bone conduction earphone that is hung on the patient's ear to prevent it from falling off during exercise, but some patients also suffer from myopia and need to wear glasses, and in this case, when the bone conduction earphone needs to be worn, the temple of the glasses also needs to be hung on the ear, so there is a problem that the bone conduction earphone cannot be worn or is difficult to use. Summary of the Invention [Means for solving the problem]

[0005] In view of the shortcomings of the prior art, the present invention provides bone conduction hearing aid glasses, which solves the problems proposed in the background art mentioned above.

[0006] In order to achieve the above objectives, the present invention is realized by the following technical solution, which is bone conduction hearing aid glasses comprising a glasses mechanism, a connection mechanism is fixedly connected to the center of both rear ends of the glasses mechanism, bone conduction temple mechanisms are fixedly connected to the opposite sides of the connection mechanism, a rubber ring is fitted around the outer periphery of the middle and rear parts of the bone conduction temple mechanisms, a rubber hook is fixedly connected to the lower ends of the rubber rings, a connection snap is fixedly attached to the rear ends of the bone conduction temple mechanisms, and the rear ends of the connection snaps are fixedly attached to the front ends of anti-fall-off mechanisms.

[0007] Preferably, the eyeglass mechanism comprises a frame, there are two of the frames, lenses are fixedly attached inside the frames, a mounting groove is opened in the center of the frames, nose pads are fixedly connected to the lower parts of the adjacent rear ends of the frames, adjacent upper ends of the frames are fixedly connected to both ends of a connecting bridge, and the outer peripheries of the lenses are engaged and connected inside the mounting grooves.

[0008] Preferably, the connection mechanism comprises a rotating base, the distant sides of which are fixedly connected to the front ends of the adjacent sides of the bone conduction temple mechanism, and connection lugs are rotatably connected to the inside of the rotating base via tightening adjustment screws, and the fronts of the connection lugs are fixedly connected to the central portions of the distant sides at the rear of the frame.

[0009] Preferably, the bone conduction temple mechanism comprises a temple body, the front ends of which are adjacent to each other have through holes uniformly distributed, the rear ends of the temple body each have a first connection hole opened, the rear ends of the temple body each have an anti-slip rubber pad fixedly connected, the front end openings of the temple body each have a touch button fixedly connected, the inside of the front end of the temple body each has a voice recognition device fixedly connected, the front ends of the temple body each have a chip fixedly connected, the front ends of the temple body each have a bone conduction device fixedly connected to the center, and the rear ends of the temple body each have a magnetic attraction rechargeable battery fixedly connected.

[0010] Preferably, the magnetic attraction rechargeable battery is electrically connected to the voice recognition device, the chip, and the bone conduction device, all via wires, and the chip is electrically connected to the touch button, the voice recognition device, and the bone conduction device, all via wires.

[0011] Preferably, the anti-falling mechanism comprises a collection chamber, a collection ring rotatably connected to the center of the collection chamber, a locking hole opened in the rear center of the collection ring, a binding tape fixedly connected inside the locking hole, both ends of the binding tape penetrating and extending through openings in the center of both sides of the collection chamber, both ends of the binding tape having second connection holes opened, a cross-fixed slide post fixedly connected to the center of the collection chamber, a rebound device fixedly connected to the outer periphery of the center of the cross-fixed slide post, the outer periphery of the rebound device fixedly connected to the center of the collection chamber, and position limiting assemblies are provided at both the upper and lower ends of the cross-fixed slide post.

[0012] Preferably, the position limiting assembly includes a press, the inner sides of adjacent ends of which are both slidably connected to the outer periphery of both ends of a fixed cross slide post, a position limiting sheet is fixedly connected to the outer periphery of a central part of the press, adjacent ends of the position limiting sheets are both fixedly connected to springs, adjacent ends of the springs are both fixedly connected to position limiting ring gears, and the inner sides of the position limiting ring gears are both meshed with the position limiting gears.

[0013] Preferably, the central portions of the outer periphery of the press are both slidably connected within the openings at the central portions of the upper and lower ends of the collecting chamber, the inner peripheries of the position limiting gears are both slidably connected to the outer peripheries at the upper and lower ends of the central portion of the cross fixed slide post, the inner peripheries of the remote sides of the position limiting gears are both fixedly connected to the adjacent ends of the press, and the outer peripheries of the position limiting ring gears are both fixedly connected to the upper and lower ends of the central portion of the inner wall of the collecting chamber.

[0014] The operating principle is as follows: first, when the bone conduction glasses need to be worn, slide the rubber ring onto the outer circumference of the bone conduction temple mechanism, then engage the rubber hooks with the rear ends of the patient's ears, attach the connecting snap into the inside of the first connecting hole, attach both ends of the anti-drop mechanism into the inside of the connecting snap, press the presser to disengage the upper and lower position limiting gears from the position limiting ring gear, and pull the collection chamber, pull the binding tape out of the collection chamber, loosen the presser, and move the presser away through the position limiting sheet and spring, and then press the position limiting ring. The gear and the position limiting ring gear are driven to mesh again, so that the binding tape is not withdrawn into the inside of the collection chamber. After the bone conduction glasses are worn on both ears of the patient, the fall-off prevention mechanism is placed on the back of the patient's head, and the press is pressed to disengage the position limiting gear and the position limiting ring gear. Then, the rebound force of the rebound device is used to rotate the collection ring inside the collection chamber, and the binding tape is withdrawn into the inside of the collection chamber through the locking port and wrapped around the outer circumference of the collection ring, so that the collection chamber and the binding tape are completely attached to the back of the patient's head. After the bone conduction glasses are put on, the press is loosened, the position limiting gear and the position limiting ring gear are meshed again, and the binding tape is no longer collected inside the collection chamber. The automatic recovery anti-drop mechanism is connected to the first connection hole at the rear end of the temple body through the connection snap, and is fitted with the rubber ring and the rubber hook. When the bone conduction glasses need to be put on, the bone conduction glasses are prevented from falling off and being damaged due to the patient's vigorous exercise. After putting on the bone conduction glasses, the touch button is touched to open the voice recognition device and the bone conduction device through the chip, and the external sound is prevented from falling off. The sound signal is transmitted to the voice recognition device through the through hole, and the voice recognition device transmits the sound signal to the chip, and the chip converts the sound signal into a vibration signal and transmits it to the bone conduction device. The bone conduction device generates vibrations, causing the patient's skull to vibrate, and then transmits the vibration signal to the patient's cochlea, which returns the sound signal collected by the voice recognition device. By installing a bone conduction module inside the bone conduction temple mechanism, patients with hearing impairment and myopia can complete vision correction and hearing correction at the same time, and avoid the occurrence of wearing problems caused by the need to wear glasses and bone conduction hearing aids at the same time. Effect of the Invention

[0015] The present invention provides bone conduction hearing aid glasses, which have the following beneficial effects: First, by installing a bone conduction module inside the bone conduction temple mechanism, the present invention enables patients with hearing impairment and myopia to complete vision correction and hearing correction at the same time, thereby avoiding the discomfort caused by having to wear glasses and a bone conduction hearing aid at the same time. Second, the present invention connects an automatically retractable anti-fall-off mechanism into the first connection hole at the rear end of the temple body through a connection snap, and engages with a rubber ring and a rubber hook, thereby preventing the bone conduction glasses from falling off and being damaged due to strenuous exercise by the patient when it is necessary to wear the bone conduction glasses. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view of the present invention. [Diagram 2] FIG. 2 is a perspective view of the present invention. [Diagram 3] FIG. 3 is a perspective view of the present invention. [Figure 4] 1 is a perspective view showing the internal structure of a side of a bone conduction temple mechanism according to the present invention; FIG. [Diagram 5] FIG. 2 is a partially exploded perspective view of the present invention. [Figure 6] FIG. 2 is a perspective view of a fall-off prevention mechanism according to the present invention. [Figure 7] 4 is a perspective view showing the internal structure of a side portion of the fall-off prevention mechanism according to the present invention; FIG. [Figure 8] FIG. 4 is an enlarged view of a portion A in FIG. 3 according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the technical aspects of the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and are not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without performing creative labor belong to the scope of protection of the present invention.

[0018] (Example) As shown in Figures 1-8, an embodiment of the present invention provides bone conduction hearing aid glasses, which comprises a glasses mechanism 1, a connection mechanism 2 fixedly connected to the center of both rear ends of the glasses mechanism 1, bone conduction temple mechanisms 3 fixedly connected to the opposite sides of the connection mechanism 2, a rubber ring 5 is fitted around the outer periphery of the middle and rear parts of the bone conduction temple mechanisms 3, a rubber hook 6 is fixedly connected to the lower ends of the rubber rings 5, a connection snap 7 is fixedly attached to the rear ends of the bone conduction temple mechanisms 3, and the rear ends of the connection snaps 7 are fixedly attached to the front end of an anti-fall-off mechanism 4.

[0019] The eyeglass mechanism 1 comprises two frames 11, lenses 12 are fixedly attached inside each frame 11, a mounting groove 13 is formed in the center of the frame 11, nose pads 14 are fixedly connected to the lower parts of adjacent rear ends of the frames 11, adjacent upper ends of the frames 22 are fixedly connected to both ends of a connecting bridge 15, and the outer peripheries of the lenses 12 are engaged and connected inside the mounting grooves 13.

[0020] The connection mechanism 2 comprises a rotating base 21, the mutually distant sides of which are fixedly connected to the front ends of the mutually adjacent sides of the bone conduction temple mechanism 3, and inside the rotating base 21, connection lugs 23 are rotatably connected via tightening adjustment screws 22, and the front ends of the connection lugs 23 are fixedly connected to the central portions of the mutually distant sides at the rear of the frame 11.

[0021] The bone conduction temple mechanism 3 comprises a temple body 31, with through holes 32 uniformly distributed at the front ends of the temple body 31 on the sides adjacent to each other, a first connection hole 33 opened at each rear end of the temple body 31, a non-slip rubber pad 34 fixedly connected to each rear end of the temple body 31 on the sides adjacent to each other, a touch button 35 fixedly connected to each front end opening on each side of the temple body 31 on the sides distant from each other, a voice recognition device 36 fixedly connected inside the front end of the temple body 31, a chip 37 fixedly connected to the front of the center part of the temple body 31, a bone conduction device 38 fixedly connected to the center part of the temple body 31, and a magnetic attraction rechargeable battery 39 fixedly connected to the rear of the temple body 31.

[0022] The magnetic attraction rechargeable battery 39 is electrically connected to the voice recognition device 36, the chip 37, and the bone conduction device 38, all via wires, and the chip 37 is electrically connected to the touch button 35, the voice recognition device 36, and the bone conduction device 38, all via wires.

[0023] After putting on the bone conduction glasses, touch the touch button 35 to open the voice recognition device 36 and the bone conduction device 38 through the chip 37, the external sound is transmitted to the voice recognition device 36 through the through hole 32, the voice recognition device 36 transmits the sound signal to the chip 37, the chip 37 converts the sound signal into a vibration signal and transmits it to the bone conduction device 38, the bone conduction device 38 generates vibration, causing the patient's skull vibration, and then transmits the vibration signal to the patient's cochlea, and the sound signal collected by the voice recognition device 36 is returned. By providing a bone conduction module inside the bone conduction temple mechanism 3, it is possible to realize the patients with hearing impairment and myopia, and at the same time complete the vision correction and hearing correction, and avoid the occurrence of wearing discomfort caused by the need to wear glasses and bone conduction hearing aids at the same time. Here, the discrimination sensitivity of the voice recognition device 36 is ?20dbm, the magnetic attraction rechargeable battery 39 is a rechargeable battery with a magnetic attraction coil, the capacity is more than 100MA, ensuring that the continuous operation of the bone conduction hearing aid glasses is more than 4 hours, how the chip 37 converts the sound signal into a vibration signal and transmits it to the bone conductor 38 to generate vibration is a conventional technology, which will not be described further here, but the chip 37 has Bluetooth (registered trademark) receiving technology and has a Bluetooth connection function for a mobile phone, and when not talking or listening to a song, the hearing aid function can be activated by turning on the switch, the voice recognition device 36 can only recognize the sound of speech and cannot recognize other sounds, the distance is within 2M, and signal interference can be avoided, and by sliding the outside of the touch button 35, the bone conduction intensity can be controlled and the volume of the bone conduction sound can be adjusted, the touch button 35 on the left temple is responsible for listening to songs, such as play, pause, previous song, next song, and the touch button 35 on the right temple is responsible for talking, such as phone, dial back, call rejection, and volume adjustment.

[0024] The anti-fall-out mechanism 4 has a collection chamber 41, a collection ring 42 is rotatably connected to the center of the collection chamber 41, a locking opening 43 is opened in the rear center of the collection ring 42, a binding tape 44 is fixedly connected inside the locking opening 43, both ends of the binding tape 44 pass through and extend out from openings in the center of both sides of the collection chamber 41, both ends of the binding tape 44 have second connection holes 45 opened, a cross-shaped fixed slide post 46 is fixedly connected to the center of the collection chamber 41, a rebound device 412 is fixedly connected to the outer periphery of the central part of the cross-shaped fixed slide post 46, the outer periphery of the rebound device 412 is fixedly connected to the center of the collection chamber 42, and position limiting assemblies are provided at both the upper and lower ends of the cross-shaped fixed slide post 46.

[0025] The position limiting assembly includes a press device 47, the insides of which are adjacent ends are both slidably connected to the outer periphery of both ends of a cross-shaped fixed slide post 46, a position limiting sheet 48 is fixedly connected to the outer periphery of the central part of the press device 47, springs 49 are fixedly connected to both adjacent ends of the position limiting sheet 48, position limiting ring gears 411 are fixedly connected to both adjacent ends of the springs 49, and the insides of the position limiting ring gears 411 are meshed with position limiting gears 410.

[0026] The central portions of the outer periphery of the press device 47 are both slidably connected to the openings in the central portions of the upper and lower ends of the collection chamber 41, the inner peripheries of the position limiting gears 410 are both slidably connected to the outer peripheries of the upper and lower ends of the central portion of the cross fixed slide post 46, the inner peripheries of the mutually distant sides of the position limiting gears 410 are both fixedly connected to mutually adjacent ends of the press device 47, and the outer peripheries of the position limiting ring gears 411 are both fixedly connected to the upper and lower ends of the central portion of the inner wall of the collection chamber 42.

[0027] When it is necessary to wear the bone conduction hearing aid glasses, slide the rubber ring 5 onto the outer circumference of the bone conduction temple mechanism 3, and then engage the rubber hooks 6 with the rear ends of the patient's ears. Then, attach the connection snaps 7 into the inside of the first connection hole 33, attach both ends of the fall-off prevention mechanism 4 into the inside of the connection snaps 7, press the presser 47, disengage the upper and lower position limiting gears 410 and the position limiting ring gear 411, and pull the collection chamber 41, pull out the binding tape 44 from the inside of the collection chamber, loosen the presser 47, move the presser 47 away through the position limiting sheet 48 and the spring 49, and drive the position limiting gear 410 and the position limiting ring gear 411 to be engaged again, so that the binding tape 44 is not withdrawn into the collection chamber 41. After wearing the bone conduction glasses on the patient's ears, place the fall-off prevention mechanism 4 on the back of the patient's head and press the presser 47. , the position limiting gear 410 and the position limiting ring gear 411 are disengaged, and then the collection ring 42 is rotated inside the collection chamber 41 by the rebound force of the rebound device 412, and the binding tape 44 is retrieved inside the collection chamber through the locking port 43 and wrapped around the outer circumference of the collection ring 42. After the collection chamber 41 and the binding tape 44 are completely attached to the back of the patient's head, the presser 47 is loosened, the position limiting gear 410 and the position limiting ring gear 411 are re-engaged, and the binding tape 44 is no longer retrieved inside the collection chamber 41. The automatically retractable anti-falling mechanism 4 is connected through the connecting snap 7 into the first connecting hole 33 at the rear end of the temple body 31, and engaged with the rubber ring 5 and the rubber hook 6. When the bone conduction glasses need to be worn, the bone conduction glasses are prevented from falling off and being damaged due to the patient's vigorous exercise.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that the same may be modified, altered, substituted, and changed without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and equivalents thereof. [Explanation of symbols]

[0029] 1, glasses mechanism; 11, frame; 12, lens; 13, mounting groove; 14, nose pad; 15, connection bridge; 2, connection mechanism; 21, rotating base; 22, tightening adjustment screw; 23, connection lug; 3, bone conduction temple mechanism; 31, temple body; 32, through hole; 33, first connection hole; 34, rubber pad; 35, touch button; 36, voice recognition device; 37, chip; 38, bone conduction device; 39, magnetic suction rechargeable battery; 4, anti-fall mechanism; 41, collection chamber; 42, collection ring; 43, locking port; 44, binding tape; 45, second connection hole; 46, cross-fixed slide post; 47, press; 48, position limit sheet; 49, spring; 410, position limit gear; 411, position limit ring gear; 412, rebound device; 5, rubber ring; 6, rubber hook; 7, connection snap.

Claims

1. Bone conduction hearing aid glasses comprising a glasses mechanism (1), The bone conduction hearing aid glasses are characterized in that a connection mechanism (2) is fixedly connected to the center of both rear ends of the eyeglass mechanism (1), bone conduction temple mechanisms (3) are fixedly connected to the sides of the connection mechanisms (2) that are spaced apart from each other, a rubber ring (5) is fitted around the outer periphery of the middle and rear parts of the bone conduction temple mechanisms (3), a rubber hook (6) is fixedly connected to the lower end of each of the rubber rings (5), a connection snap (7) is fixedly attached to the rear ends of each of the bone conduction temple mechanisms (3), and the rear ends of the connection snaps (7) are fixedly attached to the front end of an anti-fall-off mechanism (4).

2. The bone conduction hearing aid glasses according to claim 1, characterized in that the glasses mechanism (1) comprises a frame (11), there are two frames (11), lenses (12) are fixedly attached inside each of the frames (11), a mounting groove (13) is opened in the center of the frame (11), nose pads (14) are fixedly connected to the lower parts of the adjacent rear ends of the frames (11), the upper ends of the frames (11) on the adjacent sides are fixedly connected to both ends of a connecting bridge (15), and the outer peripheries of the lenses (12) are engaged and connected inside the mounting grooves (13).

3. The bone conduction hearing aid glasses as described in claim 1, characterized in that the connection mechanism (2) comprises a rotating base (21), the mutually distant sides of which are fixedly connected to the front ends of the mutually adjacent sides of the bone conduction temple mechanism (3), the inside of which has connection lugs (23) rotatably connected via tightening adjustment screws (22), and the fronts of the connection lugs (23) are both fixedly connected to the central portions of the mutually distant sides at the rear of the frame (11).

4. The bone conduction hearing aid glasses according to claim 1, characterized in that the bone conduction temple mechanism (3) comprises a temple body (31), through holes (32) are uniformly distributed at the front ends of the temple bodies (31) adjacent to each other, a first connection hole (33) is opened at the rear ends of the temple bodies (31), anti-slip rubber pads (34) are fixedly connected to the rear ends of the temple bodies (31) adjacent to each other, touch buttons (35) are fixedly connected to the front end openings of the temple bodies (31) on the far sides of the temple bodies (31), a voice recognition device (36) is fixedly connected to the inside of the front end of the temple body (31), a chip (37) is fixedly connected to the front of the center part of the temple body (31), a bone conduction device (38) is fixedly connected to the center part of the temple body (31), and a magnetic attraction rechargeable battery (39) is fixedly connected to the rear of the temple body (31).

5. The bone conduction hearing aid glasses according to claim 4, characterized in that the magnetic attraction rechargeable battery (39) is electrically connected to the voice recognition device (36), the chip (37), and the bone conduction device (38), all via wires, and the chip (37) is electrically connected to the touch button (35), the voice recognition device (36), and the bone conduction device (38), all via wires.

6. The fall-off prevention mechanism (4) comprises a collection chamber (41), a collection chamber (42) is rotatably connected to the center of the collection chamber (41), a locking port (43) is opened at the rear center of the collection chamber (42), a binding tape (44) is fixedly connected inside the locking port (43), both ends of the binding tape (44) extend through the openings at the center of both sides of the collection chamber (41), and both ends of the binding tape (44) have second connection holes (45). The bone conduction hearing aid glasses according to claim 1, characterized in that a cross-fixed slide post (46) is fixedly connected to the central part of the collection chamber (41), a rebound device (412) is fixedly connected to the outer periphery of the central part of the cross-fixed slide post (46), the outer periphery of the rebound device (412) is fixedly connected to the central part of the collection chamber (42), and a position limiting assembly is provided at both the upper and lower ends of the cross-fixed slide post (46).

7. The bone conduction hearing aid glasses of claim 6, characterized in that the position limiting assembly comprises a press (47), the inner sides of adjacent ends of which are both slidably connected to the outer periphery of both ends of a cross-shaped fixed slide post (46), a position limiting sheet (48) fixedly connected to the outer periphery of the central part of the press (47), springs (49) fixedly connected to adjacent ends of the position limiting sheet (48), position limiting ring gears (411) fixedly connected to adjacent ends of the springs (49), and the inner sides of the position limiting ring gears (411) are both meshed with the position limiting gears (410).

8. The bone conduction hearing aid glasses of claim 7, characterized in that the central portions of the outer periphery of the press device (47) are both slidably connected to openings in the central portions of the upper and lower ends of the collection chamber (41), the inner peripheries of the position limiting gears (410) are both slidably connected to the outer peripheries of the upper and lower ends of the central portion of the cross fixed slide post (46), the inner peripheries of the mutually distant sides of the position limiting gears (410) are both fixedly connected to one end of the press device (47) that is close to each other, and the outer periphery of the position limiting ring gear (411) is both fixedly connected to the upper and lower ends of the central portion of the inner wall of the collection chamber (42).

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