Magnetic type spectroscope integrated medical eyeshade and assembly process thereof

Abstract

The invention discloses a magnetic type spectroscope integrated medical eyeshade and an assembling process thereof. The magnetic type spectroscope integrated medical eyeshade comprises an eyeshade body and a head band used for fixing the eyeshade body to the head of a user. The eyeshade body comprises two eyeshade shells; the eyeshade shell comprises an inner shell, an outer shell and a protective cover; an eye detection groove is formed in the inner shell; a socket and a mounting seat are respectively arranged on two sides of the eye detection groove; a spectroscope is inserted into the socket; a camera module and an LED lamp panel corresponding to the spectroscope are arranged on the mounting seat; the inner shell is detachably connected to the side, close to the head band, of the outer shell through a second bolt. The protective cover is detachably connected to the side, away from the headband, of the outer shell. The two outer shells are detachably connected together through first bolts. The inner shell, the outer shell, the protective cover and the spectroscope are assembled together in a detachable connection mode, the eyeshade structure can be simplified, assembling convenience can be improved, assembling efficiency can be improved, and eyeshade assembling time can be shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly to a magnetic spectroscope-integrated medical eye mask and an assembly process thereof. Background Art

[0002] Benign paroxysmal positional vertigo (BPPV) is a self-limited peripheral vestibular disorder that causes brief episodes of vertigo when the head moves to a specific position. BPPV can occur in either semicircular canal, or in two or more canals simultaneously. The commonly used diagnostic method for BPPV is the Hallpike positional nystagmus test. The key to diagnosis lies in determining the lateralization and location of the affected area based on the characteristic nystagmus induced by the positional test.

[0003] There are three main methods for observing and recording nystagmus: naked eye observation, electronystagmography, and videonystagmography. Naked eye observation involves direct observation of nystagmus, which can be subjective, prone to large errors, and difficult to observe weak nystagmus. Electronystagmography uses electronic instruments to record changes in electrical potential between the cornea and retina. The posterior eyeball and retina are negatively charged, while the anterior eyeball and cornea are positively charged. Therefore, eye movement produces changes in electrical potential. Electrodes are attached around the eyeball, and the potential changes caused by eye movement are recorded. Electronystagmography is an objective record of nystagmus and is more accurate than naked eye observation. However, electronystagmography requires attaching bioelectrodes to the patient's cornea, which can easily cause discomfort to the patient's eye and be affected by the physiological potential of the electrode placement, leading to detection errors. Videonystagmography uses infrared technology to record nystagmus. Because it does not require contact with the patient's eyeball, it does not cause discomfort to the patient and eliminates the disadvantage of electrodes being easily interfered with. In recent years, it has been widely used in actual clinical practice.

[0004] The Benign Paroxysmal Positional Vertigo (BPPV) diagnostic and treatment system effectively repositions the otoliths within the semicircular canals into the vestibular utricle by changing the body's posture and the spatial position of the semicircular canals, thereby achieving clinical cure. The system drives the patient's chair with horizontal and vertical rotation, achieving full-angle rotation in space. It also utilizes an infrared camera and analysis software in the eye mask to capture nystagmus curves for vestibular function testing and the diagnosis and treatment of BPPV. However, existing BPPV diagnostic and treatment systems have complex eye masks and require lengthy assembly times. Summary of the Invention

[0005] In view of this, the present invention provides a magnetic spectroscope integrated medical eye mask and an assembly process thereof, the purpose of which is to solve the problems in the prior art.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A magnetic spectroscope-integrated medical eye mask comprises: an eye mask body and a headband for fixing the eye mask body to the user's head; the eye mask body comprises two eye mask shells; the eye mask shells comprise an inner shell, an outer shell, and a protective cover; an eye detection slot is defined on the inner shell; a socket and a mounting seat are respectively provided on both sides of the eye detection slot; a spectroscope is inserted into the socket; a camera module and an LED light board corresponding to the spectroscope are provided on the mounting seat; the inner shell is detachably connected to the outer shell on a side close to the headband by a second bolt; the protective cover is detachably connected to the outer shell on a side away from the headband; and the two outer shells are detachably connected together by a first bolt.

[0008] Preferably, there are two sockets on the inner shell; the two sockets are respectively arranged on both sides of the eye detection slot; slots adapted to the spectroscope are opened on opposite sides of the two sockets; and the two sides of the spectroscope are respectively inserted into the two slots.

[0009] Preferably, the camera module includes a camera and a camera module mainboard; the camera is arranged on the camera module mainboard; a mounting slot is provided on the mounting seat; the camera is inserted into the mounting slot; the camera module mainboard is detachably connected to the side of the mounting seat away from the spectrometer through a connecting component.

[0010] Preferably, the connecting assembly includes a third bolt, a spring and a nylon gasket; the camera module mainboard is connected to the mounting base through the third bolt; the spring and the nylon gasket are both mounted on the third bolt; the spring is located between the mounting base and the camera module mainboard; the nylon gasket is located between the spring and the camera module mainboard.

[0011] Preferably, a driven gear is provided on the outer side of the lens of the camera; an adjusting rod is rotatably connected to the outer shell; one end of the adjusting rod extends to the inside of the outer shell and is provided with a driving gear; the driving gear is engaged with the driven gear; the other end of the adjusting rod extends to the outside of the outer shell and is provided with a focusing knob.

[0012] Preferably, a plurality of first magnets are embedded on a side of the protective cover close to the outer shell; a plurality of second magnets are provided on a side of the outer shell close to the protective cover; the first magnets and the second magnets are the same in number and are arranged in a one-to-one correspondence.

[0013] Preferably, a positioning groove is provided on a side of the outer shell close to the protective cover; and a positioning block adapted to the positioning groove is provided on the protective cover.

[0014] Preferably, the LED light board is a U-shaped structure; the LED light board is arranged on a side of the mounting base close to the spectrometer.

[0015] Preferably, the headband is provided with a Japanese-shaped buckle.

[0016] A magnetic spectroscope integrated medical eye mask assembly process, used for the above-mentioned magnetic spectroscope integrated medical eye mask, comprises the following steps:

[0017] S1, installation of LED light board: install the LED light board on the mounting base of the inner shell;

[0018] S2, installation of the camera module and the outer shell: S21, use the connecting assembly to install the camera module on the mounting base; S22, install the driven gear on the lens of the camera; S23, install the outer shell and the inner shell together; S24, install the adjustment rod on the side of the outer shell away from the center of the eye mask body, and install the focusing knob and the driving gear at both ends of the adjustment rod respectively; S25, perform a focusing test using the focusing knob and the driving gear. After the test is completed, remove the focusing knob and the driving gear;

[0019] S3, installation of the beam splitter: install the beam splitter on the socket of the inner housing;

[0020] S4, connect the LED light board to the camera module mainboard through the power cable;

[0021] S5, assembling the two outer shells together by means of a first bolt;

[0022] S6, assembling the inner casing and the outer casing together by a second bolt;

[0023] S7, reinstall the focus knob and driving gear on the adjustment rod;

[0024] S8, mounting the protective cover on the outer shell by using the first magnet and the second magnet;

[0025] S9, install the headband and Japanese buckle.

[0026] Compared with the prior art, the present invention has achieved the following technical effects:

[0027] 1) The present invention assembles the inner shell, the outer shell, the protective cover and the spectroscope together in a detachable connection manner, which can simplify the eye mask structure and improve the assembly convenience, thereby improving the assembly efficiency and reducing the eye mask assembly time.

[0028] 2) In the present invention, the spectroscope and the inner housing are attracted together by the third magnet and the fourth magnet, which can improve the connection stability between the spectroscope and the inner housing, thereby improving the diagnostic accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a three-dimensional image of a magnetic spectroscope integrated medical eye mask under one viewing angle of the present invention;

[0030] Figure 2 This is a stereoscopic image of a magnetic spectroscope-integrated medical eye mask from another viewing angle;

[0031] Figure 3 This is an exploded view of the eye mask shell;

[0032] Figure 4 Schematic diagram of the interior of the eye mask after removing the protective cover;

[0033] Figure 5 A schematic diagram of the camera module and the beam splitter installed on the inner housing;

[0034] Figure 6 Schematic diagram of the structure of the inner shell;

[0035] Figure 7 Schematic diagram of the structure of the outer shell;

[0036] Figure 8 Schematic diagram of the structure of the protective cover;

[0037] Figure 9 A schematic diagram of the connection between the camera module mainboard and the mounting base;

[0038] Figure 10 A schematic diagram showing the connection components, camera module mainboard, and camera head.

[0039] In the figure: 1. Headband; 2. Eye mask shell; 21. Inner shell; 211. Eye detection slot; 22. Outer shell; 221. Positioning slot; 23. Protective cover; 231. Positioning block; 24. Socket; 241. Slot; 25. Mounting seat; 251. Mounting slot; 26. Eye pad; 3. Spectrometer; 4. Camera module; 41. Camera; 42. Camera module mainboard; 43. Driven gear; 44. Adjustment lever; 45. Driving gear; 46. Focusing knob; 5. LED light board; 6. Connecting assembly; 61. Third bolt; 62. Spring; 63. Nylon gasket; 7. First magnet; 8. Second magnet; 9. Japanese buckle. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Reference Figure 1-10 As shown, the present invention provides a magnetic spectroscope integrated medical eye mask, comprising: an eye mask body and a headband 1 for fixing the eye mask body to the user's head; the eye mask body comprises two eye mask shells 2; the eye mask shell 2 comprises an inner shell 21, an outer shell 22 and a protective cover 23; an eye detection slot 211 is opened on the inner shell 21; a socket 24 and a mounting seat 25 are respectively provided on both sides of the eye detection slot 211; the socket 24 and the mounting seat 25 are both arranged on the side of the inner shell 21 close to the outer shell 22, wherein the socket 24 is arranged close to the center of the eye mask body, and the mounting seat 25 is arranged away from the center of the eye mask body; a spectroscope 3 is inserted in the socket 24; a camera module 4 and an LED light board 5 corresponding to the spectroscope 3 are provided on the mounting seat 25; the inner shell 21 is detachably connected to the side of the outer shell 22 close to the headband 1 by a second bolt; the protective cover 23 is detachably connected to the side of the outer shell 22 away from the headband 1; the two outer shells 22 are detachably connected together by a first bolt.

[0042] The above technical solution assembles the inner shell, outer shell, protective cover and spectrometer together in a detachable connection manner, which can simplify the eye mask structure and improve the assembly convenience, thereby improving the assembly efficiency and reducing the eye mask assembly time.

[0043] In this embodiment, there are two sockets 24 on the inner shell 21; the two sockets 24 are respectively arranged on both sides of the eye detection slot 211; the opposite sides of the two sockets 24 are each provided with a slot 241 adapted to the spectrometer 3; the two sides of the spectrometer 3 are respectively inserted into the two slots 241.

[0044] In this embodiment, the camera module 4 includes a camera head 41 and a camera module mainboard 42; the camera head 41 is arranged on the camera module mainboard 42; a mounting groove 251 is opened on the mounting base 25; the camera 41 is inserted into the mounting groove 251; the camera module mainboard 42 is detachably connected to the side of the mounting base 25 away from the spectrometer 3 through the connecting component 6, which facilitates the disassembly and assembly of the camera module, thereby improving the efficiency of the eye mask assembly.

[0045] In this embodiment, the connecting assembly 6 includes a third bolt 61, a spring 62 and a nylon gasket 63; the camera module mainboard 42 is connected to the mounting base 25 through the third bolt 61; the spring 62 and the nylon gasket 63 are both mounted on the third bolt 61; the spring 62 is located between the mounting base 25 and the camera module mainboard 42; the nylon gasket 63 is located between the spring 62 and the camera module mainboard 42, which can protect the camera module mainboard 42 and prevent the spring 62 from scratching the camera module mainboard 42; when in use, first insert the camera 41 into the mounting slot 251 on the mounting base 25, and then thread the camera module mainboard 42 onto the mounting base 25 through the third bolt, and the spring 62 is compressed between the mounting base 25 and the camera module mainboard 42, and a gap of 1-2 mm is maintained between the camera module mainboard 42 and the mounting base 25.

[0046] In this embodiment, the number of third bolts 61 is four; four through holes are provided on the four edges of the camera module main board 42; the four third bolts 61 are respectively passed through the four through holes on the camera module main board 42; threaded holes compatible with the third bolts 61 are provided on the mounting base 25; the third bolts 61 are threadedly connected to the corresponding threaded holes.

[0047] In this embodiment, a driven gear 43 is provided on the outer side of the lens of the camera 41; an adjusting rod 44 is rotatably connected to the outer shell 22; one end of the adjusting rod 44 extends to the interior of the outer shell 22 and is provided with a driving gear 45; the driving gear 45 is engaged with the driven gear 43; the other end of the adjusting rod 44 extends to the outside of the outer shell 22 and is provided with a focusing knob 46; when in use, the focusing knob 46 is rotated, and the focusing knob 46 drives the driving gear 45 to rotate through the adjusting rod 44, and the driving gear 45 drives the driven gear 43 to rotate, and the driven gear 43 drives the lens of the camera 41 to rotate to adjust the focal length.

[0048] In this embodiment, a square groove is opened in the middle of the driving gear 45; one end of the adjusting rod 44 is set as a square structure; the driving gear 45 is plugged into the square structure at one end of the adjusting rod 44 through the square groove to achieve quick assembly.

[0049] In this embodiment, a plurality of first magnets 7 are embedded in the side of the protective cover 23 close to the outer shell 22; a plurality of second magnets 8 are provided on the side of the outer shell 22 close to the protective cover 23; the number of the first magnets 7 and the second magnets 8 are the same, and are arranged in a one-to-one correspondence; when in use, the first magnets 7 and the corresponding second magnets are attracted together, so that the protective cover 23 and the outer shell 22 can be quickly assembled, thereby improving assembly efficiency.

[0050] In this embodiment, a positioning groove 221 is provided on the side of the outer shell 22 close to the protective cover 23; a positioning block 231 adapted to the positioning groove 221 is provided on the protective cover 23; the positioning block 231 cooperates with the positioning groove 221 to achieve rapid positioning and assembly of the protective cover and the outer shell.

[0051] In this embodiment, the LED light board 5 is a U-shaped structure; the LED light board 5 is bonded to the side of the mounting base 25 close to the beam splitter 3 .

[0052] In this embodiment, a Japanese-style buckle 9 is provided on the headband 1 to facilitate adjusting the tightness of the headband 1 .

[0053] In this embodiment, a third magnet is provided on the side of the spectrometer 3 away from the mounting seat 25; a fourth magnet is provided on the inner shell 21; the number of the third magnet and the fourth magnet is the same, and they are arranged in a one-to-one correspondence; the spectrometer 3 and the inner shell 21 are adsorbed together by the third magnet and the fourth magnet, which can improve the connection stability between the spectrometer 3 and the inner shell 21, thereby improving the diagnostic accuracy.

[0054] In this embodiment, the camera module 4 also includes a camera module data cable; one end of the camera module data cable is connected to the side of the camera module mainboard 42 away from the mounting seat 25; when assembling the eye mask, first connect one end of the camera module data cable to the camera module mainboard 42, and then pass the other end of the camera module data cable through the outlet reserved on the outer shell 22 and connect to the external data receiving device.

[0055] In this embodiment, an eye pad 26 is provided on a side of the inner shell 21 away from the outer shell 22 .

[0056] In this embodiment, the eye pads 26 are bonded to the inner shell 21 by glue.

[0057] In some other embodiments, a gyroscope is embedded in the outer shell 22 .

[0058] In some other embodiments, a temperature sensor is provided inside the eye mask body.

[0059] In some other embodiments, a fan is provided on the outer surface of the outer shell 22 to cool the interior of the eye mask body and prevent the electronic components from overheating.

[0060] The present invention also provides a magnetic spectroscope integrated medical eye mask assembly process, which is used for the above-mentioned magnetic spectroscope integrated medical eye mask, comprising the following steps:

[0061] S1, installation of the LED light board 5: installing the LED light board 5 on the mounting base 25 of the inner housing 21;

[0062] S2, installation of the camera module 4 and the outer shell 22: S21, use the connecting assembly 6 to install the camera module 4 on the mounting base 25; S22, install the driven gear 43 on the lens of the camera 41; S23, install the outer shell 22 and the inner shell 21 together; S24, install the adjustment rod 44 on the side of the outer shell 22 away from the center of the eye mask body, and install the focusing knob 46 and the driving gear 45 at both ends of the adjustment rod 44; S25, perform a focusing test using the focusing knob 46 and the driving gear 45. After the test is completed, remove the focusing knob 46 and the driving gear 45;

[0063] S3, installation of the beam splitter 3: installing the beam splitter 3 on the socket 24 of the inner housing 21;

[0064] S4, connect the LED light board 5 to the camera module main board 42 through the power cable;

[0065] S5, assembling the two outer shells 22 together by means of a first bolt;

[0066] S6, assemble the inner shell 21 and the outer shell 22 together using a second bolt;

[0067] S7, reinstall the focusing knob 46 and the driving gear 45 on the adjusting rod 44, wherein the driving gear 45 and the adjusting rod 44, and the focusing knob 46 and the driving gear 45 are reinforced with glue;

[0068] S8, mounting the protective cover 23 on the outer shell 22 via the first magnet 7 and the second magnet 8;

[0069] S9, install headband 1 and Japanese buckle 9.

[0070] In this embodiment, the installation of the LED light board 5 in S1 specifically includes the following steps: S11, using an electric soldering iron to solder the power cord to the soldering pad position reserved on the LED light board 5; S12, using glue to bond the LED light board 5 to the mounting base 25.

[0071] In this embodiment, before performing S21, it is necessary to use wire cutters to cut off the USB port portion of the camera module data cable, and then pass the cut data cable through the outlet reserved on the outer shell 22 and connect it to the external data receiving device.

[0072] In this embodiment, the specific installation steps of the camera module 4 in S21 are: first, insert the camera 41 into the mounting slot 251 on the mounting base 25, and then thread the camera module mainboard 42 onto the mounting base 25 through a third bolt. The spring 62 is compressed between the mounting base 25 and the camera module mainboard 42, and a gap of 1-2 mm is maintained between the camera module mainboard 42 and the mounting base 25.

[0073] In this embodiment, during the focusing test of S24, if smooth adjustment is impossible, the focusing knob 46, the adjusting rod 44 and the driven gear 43 are removed, the outer shell 22 is removed, and the third bolt used to fix the camera module is adjusted with a screwdriver so that the camera module mainboard 42 and the mounting base 25 remain parallel. Repeat S23-S24 until the focal length can be smoothly adjusted through the focusing knob.

[0074] In this embodiment, in S4, the end of the power line away from the LED light board 5 is soldered to the camera module mainboard 42 by an electric soldering iron.

[0075] In this embodiment, after completing S4, the camera module data cable needs to be installed in the wire groove of the outer shell 22, the power cable of the LED lamp needs to be installed on the camera module mainboard, and a hot melt gun is used to reinforce the camera module data cable and power cable.

[0076] In some other implementations, after the headband 1 and the Japanese buckle 9 are completed, the eye mask cable needs to be installed, which specifically includes the following steps: first, disassemble the aviation plug, rotate the tail cover, disassemble the aviation plug into parts, then pass the cable through the tail cover and the wire clamp, use wire strippers and wire cutters to peel the cable to expose the wire, use a soldering iron to solder the wire to the needle core, and finally, assemble the aviation plug after soldering is completed.

[0077] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A magnetic spectroscope integrated medical eye mask, characterized in that: include: An eye mask body and a headband (1) for fixing the eye mask body to a user's head; the eye mask body comprises two eye mask shells (2); the eye mask shell (2) comprises an inner shell (21), an outer shell (22) and a protective cover (23); an eye detection slot (211) is provided on the inner shell (21); a socket (24) and a mounting seat (25) are respectively provided on both sides of the eye detection slot (211); a spectroscope (3) is inserted into the socket (24); a camera module (4) and an LED light board (5) corresponding to the spectroscope (3) are provided on the mounting seat (25); the inner shell (21) is detachably connected to the side of the outer shell (22) close to the headband (1) by a second bolt; the protective cover (23) is detachably connected to the side of the outer shell (22) away from the headband (1); the two outer shells (22) are detachably connected together by a first bolt.

2. The magnetic spectroscope integrated medical eye mask according to claim 1, characterized in that: There are two sockets (24) on the inner shell (21); the two sockets (24) are respectively arranged on both sides of the eye detection slot (211); opposite sides of the two sockets (24) are each provided with a slot (241) adapted to the spectroscope (3); and the two sides of the spectroscope (3) are respectively inserted into the two slots (241).

3. The magnetic spectroscope integrated medical eye mask according to claim 2, characterized in that: The camera module (4) comprises a camera head (41) and a camera module mainboard (42); the camera head (41) is arranged on the camera module mainboard (42); a mounting slot (251) is provided on the mounting seat (25); the camera head (41) is inserted into the mounting slot (251); the camera module mainboard (42) is detachably connected to a side of the mounting seat (25) away from the beam splitter (3) via a connecting assembly (6).

4. The magnetic spectroscope integrated medical eye mask according to claim 3, characterized in that: The connecting assembly (6) includes a third bolt (61), a spring (62) and a nylon washer (63); the camera module mainboard (42) is connected to the mounting seat (25) through the third bolt (61); the spring (62) and the nylon washer (63) are both sleeved on the third bolt (61); the spring (62) is located between the mounting seat (25) and the camera module mainboard (42); and the nylon washer (63) is located between the spring (62) and the camera module mainboard (42).

5. The magnetic spectroscope integrated medical eye mask according to claim 4, characterized in that: A driven gear (43) is sleeved on the outer side of the lens of the camera (41); an adjusting rod (44) is rotatably connected to the outer shell (22); one end of the adjusting rod (44) extends to the inside of the outer shell (22) and is provided with a driving gear (45); the driving gear (45) is meshed with the driven gear (43); the other end of the adjusting rod (44) extends to the outside of the outer shell (22) and is provided with a focusing knob (46).

6. The magnetic spectroscope integrated medical eye mask according to claim 1, characterized in that: A plurality of first magnets (7) are embedded on one side of the protective cover (23) close to the outer shell (22); a plurality of second magnets (8) are embedded on one side of the outer shell (22) close to the protective cover (23); the first magnets (7) and the second magnets (8) are the same in number and are arranged in a one-to-one correspondence.

7. The magnetic spectroscope integrated medical eye mask according to claim 6, characterized in that: A positioning groove (221) is provided on one side of the outer shell (22) close to the protective cover (23); and a positioning block (231) adapted to the positioning groove (221) is provided on the protective cover (23).

8. The magnetic spectroscope integrated medical eye mask according to claim 1, characterized in that: The LED light board (5) is a U-shaped structure; the LED light board (5) is arranged on a side of the mounting seat (25) close to the beam splitter (3).

9. The magnetic spectroscope integrated medical eye mask according to claim 1, characterized in that: The headband (1) is provided with a Japanese-style buckle (9).

10. A magnetic spectroscope integrated medical eye mask assembly process, characterized in that: The magnetic spectroscope integrated medical eye mask as claimed in any one of claims 1 to 9 comprises the following steps: S1, installation of the LED light board (5): installing the LED light board (5) on the mounting seat (25) of the inner housing (21); S2, installation of the camera module (4) and the outer shell (22): S21, using the connecting assembly (6) to install the camera module (4) on the mounting base (25); S22, installing the driven gear (43) on the lens of the camera (41); S23, installing the outer shell (22) and the inner shell (21) together; S24, installing the adjustment rod (44) on the side of the outer shell (22) away from the center of the eye mask body, and installing the focus knob (46) and the driving gear (45) at both ends of the adjustment rod (44) respectively; S25, performing a focus test using the focus knob (46) and the driving gear (45). After the test is completed, the focus knob (46) and the driving gear (45) are removed; S3, installation of the spectrometer (3): installing the spectrometer (3) on the socket (24) of the inner housing (21); S4, connecting the LED light board (5) and the camera module main board (42) via a power line; S5, assembling the two outer shells (22) together by means of a first bolt; S6, assembling the inner housing (21) and the outer housing (22) together by means of a second bolt; S7, reinstall the focusing knob (46) and the driving gear (45) on the adjusting rod (44); S8, mounting the protective cover (23) on the outer shell (22) via the first magnet (7) and the second magnet (8); S9, install the headband (1) and the Japanese buckle (9).

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