Eye atomization therapeutic apparatus

Abstract

The invention discloses an eye atomization therapeutic apparatus, and relates to the field of ophthalmology medical instruments, the eye atomization therapeutic apparatus comprises a shell, an opening part of the shell is provided with an upper arc part and a lower fitting part, the shell is internally provided with a waste liquid collection assembly, the waste liquid collection assembly comprises a guide plate fixed with the shell, the guide plate is provided with a diversion trench, and the diversion trench is provided with a lower arc part and a lower fitting part. And the bottom of the shell communicates with a collecting shell. According to the eye atomization therapeutic apparatus, steam can be generated by starting a small steam generator, the steam is conveyed through an input pipe, a mounting shell, an output pipe, a connecting pipe and a heating pipe and finally cooled through a condenser, the steam is changed into a liquid state again and enters a liquid storage box, unatomized liquid medicine in a medicine storage tank can be heated through the heating pipe, and the atomization effect is improved. The problem that the atomization effect of the ultrasonic atomizer is affected due to viscosity increase caused by too low temperature is solved.

Description

Technical Field

[0001] The invention relates to the technical field of ophthalmic medical instruments, and in particular to an eye atomization therapeutic apparatus. Background Art

[0002] Eye inflammation is an inflammatory response to infection or irritation of the eye. Common types include conjunctivitis, keratitis, iritis and uveitis. Typical symptoms include pain, decreased vision, redness of the eye and increased tears. Treatment methods are usually selected according to the specific type of inflammation, which may involve the use of antibiotics, antiviral drugs or steroid eye drops. In order to prevent eye inflammation, keeping the eyes clean and avoiding wearing contact lenses for too long are effective measures. Eye atomizer therapy is a medical device used to treat eye diseases. It uses atomization technology to deliver drugs to the eyes in the form of fine mist particles.

[0003] In the Chinese patent disclosure specification CN218391415U, an eye treatment device with an atomization function is disclosed. The front cover provided with an atomization chamber is hingedly connected to the face shell, and a first magnetic ring is installed in a first waterproof silicone ring on the side edge of the front cover; a second magnetic ring is installed in a second waterproof silicone ring on the side edge of the face shell, the first waterproof silicone ring and the second waterproof silicone ring are fitted together, and the second magnetic ring and the first magnetic ring are attracted to each other. During daily atomization work, the front cover and the face shell will not leak liquid. When the atomization chamber needs to be cleaned, the front cover and the face shell are opened for cleaning, which reduces the difficulty of cleaning.

[0004] An atomizing chamber is installed on the side of the front cover, more than one atomizing nozzle is installed in the second annular groove on the surface of the atomizing chamber, more than one first drainage through hole is installed on the surface of the atomizing chamber, more than one waste liquid collecting box is installed on the lower surface of the front cover, a second inlet and outlet drainage through hole is arranged on the surface of the waste liquid collecting box, and the first drainage through hole and the second inlet and outlet drainage through hole are arranged opposite to each other, so that the atomized waste liquid can be collected to prevent the waste liquid in the atomizing chamber from spilling out when the front cover and the face shell are opened.

[0005] In actual applications, it is found that when the eyes are exposed to atomized medicine for a long time, the eyes need to continuously adapt to the atomized environment and the stimulation of the medicine. The muscles around the eyes are in a tense state for a long time. Long-term atomization may cause eye muscle fatigue.

[0006] In addition, although the above patent can collect the waste liquid after atomization, the atomized particles may condense into larger droplets after the eye surface cools down, forming a phenomenon similar to sweat beads. The droplets staying in the eyes may cause a foreign body sensation, further increasing the discomfort. When the temperature is low, the viscosity of the liquid medicine may increase, thereby affecting the atomization effect. The low-temperature liquid medicine may also cause greater discomfort in the eyes after atomization. To this end, we provide an eye atomization therapy device to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to make up for the deficiencies of the prior art and to provide an eye atomization therapy device that can massage the eyes, relieve muscle fatigue, reduce the discomfort of the eyes caused by long-term exposure to atomized liquid medicine, heat the liquid medicine that has not yet been atomized, and promptly treat the condensed droplets in the eyes.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: an eye atomization therapeutic device, comprising a shell, the shell comprising an outer shell, and the opening portion of the outer shell is provided with an upper arc portion and a lower fitting portion.

[0009] A waste liquid collection component is arranged in the shell, and the waste liquid collection component includes a guide plate fixed to the shell, a guide groove is opened on the guide plate, the bottom of the shell is connected to a collection shell, the bottom of the collection shell is connected to a drain pipe, and a first valve is installed on the drain pipe.

[0010] An atomization mechanism is arranged between the shell and the steam heating mechanism, and the atomization mechanism includes a medicine storage tank fixed in the shell, an ultrasonic atomizer is installed inside the medicine storage tank, a protective sleeve is provided on the outer side of the medicine storage tank, a mist delivery pipe and a medicine adding assembly are connected to the top of the medicine storage tank, the mist delivery pipe is connected to the eye mask assembly through the mounting assembly, the medicine adding assembly includes a medicine adding pipe connected to the top of the medicine storage tank, a medicine adding hopper is connected to the upper end of the medicine storage tank, and a second valve is installed on the medicine adding pipe.

[0011] A steam heating mechanism is provided on the shell and the massage mechanism, and the steam heating mechanism includes a small steam generator fixed to the inner wall of the shell, the output end of the small steam generator is connected to an input pipe, the output end of the input pipe is connected to a mounting shell, the output end of the mounting shell is connected to an output pipe, the output end of the output pipe is connected to a connecting pipe, the output end of the connecting pipe is connected to a heating pipe, and the heating pipe is wound around the atomization mechanism.

[0012] The output end of the heating tube is provided with a steam recovery component. Specifically, the steam recovery component includes a liquid storage tank fixed to the shell, and the steam recovery component also includes a condenser connected to the output end of the heating tube. The output end of the condenser is connected to the liquid storage tank. A pressure regulating valve is installed on the liquid storage tank. The liquid storage tank is connected to the input end of the small steam generator through a pipeline.

[0013] A massage mechanism is arranged in the shell, and the massage mechanism includes a mounting assembly, and the mounting assembly includes a special-shaped shell and an air vent, and the air vent is arranged on the side of the special-shaped shell, and the mist delivery pipe is communicated with the special-shaped shell, and a guide column is rotatably connected to the mounting assembly, and a guide groove is arranged on the guide column, and a connecting rod is fixed on the guide column, and a turbine is fixed on the connecting rod, and the turbine is located inside the mounting shell.

[0014] The massage mechanism also includes an eye mask assembly, which includes an eye mask shell, a silicone pad, an eye-shaped hollow ring, and a swing hole. The eye mask shell is fixed to the silicone pad, the eye-shaped hollow ring is fixed to the eye mask shell, the swing hole is opened on the eye mask shell and the eye-shaped hollow ring, a swing rod is rotatably connected in the swing hole, and the swing rod is in contact with a guide groove on a guide column, and an elastic massage component is fixed to the right end of the swing rod.

[0015] Specifically, the elastic massage component includes a massage block, a slide rod is clamped on the massage block, an elastic member is fixed on the slide rod, the elastic member is fixed to the swing rod, the elastic member is a spring, and the massage block is made of silicone.

[0016] Compared with the existing technology, the eye atomization therapeutic device has the following beneficial effects: 1. The present invention can generate steam by starting a small steam generator. The steam will be transported through an input pipe, a mounting shell, an output pipe, a connecting pipe, and a heating pipe. Finally, after being cooled by a condenser, the steam becomes liquid again and enters a liquid storage tank. The heating pipe can heat the medicine liquid inside the medicine storage tank that has not yet been atomized, so as to solve the problem that the viscosity increases due to its too low temperature and affects the atomization effect of the ultrasonic atomizer.

[0017] 2. The steam generated by the small steam generator of the present invention will also drive the turbine to rotate, and the turbine will drive the connecting rod and the guide column to rotate on the mounting assembly. Since the swing rod is in sliding contact with the guide groove on the guide column, the rotation of the guide column will cause the swing rod to swing, so the swing rod will drive the massage block, the slide rod, and the elastic part to swing. The massage block that swings up and down can massage the eyes, relieve muscle fatigue, and reduce the discomfort of the eyes caused by long-term exposure to the atomized liquid.

[0018] 3. The present invention can wipe the condensed droplets in the eyes by means of the massage block that swings up and down, and the droplets will fall onto the guide plate. The condensed droplets can be guided by the cooperation of the guide plate and the guide groove, so that the condensed droplets flow into the interior of the collection shell along the guide groove. When cleaning is required, the first valve can be opened to discharge the waste liquid in the collection shell, thereby timely processing the condensed droplets in the eyes.

[0019] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the structure of the waste liquid collection component of the present invention; Figure 3 It is a cross-sectional view of the internal structure of the housing of the present invention; Figure 4 It is a schematic diagram of the structure of the atomization mechanism of the present invention; Figure 5 It is a schematic diagram of the structure of the fixed shell and the eye mask assembly of the present invention; Figure 6 This is a schematic diagram of the eye mask shell and silicone pad structure of the present invention; Figure 7 This is a schematic diagram of the fixed shell structure of the present invention; Figure 8 A cross-sectional view of the internal structure of the installation shell of the present invention; Fig. 9 For the present invention Figure 5 A schematic diagram of the structure enlargement in the middle; Fig.10 It is a schematic diagram of the structure of the swing rod and the elastic massage component of the present invention; Fig.11 This is a schematic diagram of the structure of the elastic massage component of the present invention; Fig.12 It is a schematic diagram of the structure of the vapor recovery component of the present invention.

[0021] In the figure: 1. Shell; 101. Outer shell; 102. Upper arc-shaped portion; 103. Lower fitting portion; 2. Massage mechanism; 201. Mounting assembly; 2011. Special-shaped shell; 2012. Air vent; 202. Guide column; 203. Connecting rod; 204. Turbine; 205. Eye mask assembly; 2051. Eye mask shell; 2052. Silicone pad; 2053. Eye-shaped hollow ring; 2054. Swing hole; 206. Swing rod; 207. Elastic massage component; 2071. Massage block; 2072. Sliding rod; 2073. Elastic member; 3. Steam heating mechanism; 301. Small steam generator; 302. Input pipe; 303. Mounting shell; 304. Output pipe; 305. Connecting pipe; 306. Heating pipe; 4. Waste liquid collection assembly; 401. Guide plate; 402. Guide groove; 403. Collection shell; 404. Drain pipe; 405. First valve; 5. Atomizing mechanism; 501. Medicine storage tank; 502. Ultrasonic atomizer; 503. Mist delivery pipe; 504. Dosing assembly; 5041. Dosing pipe; 5042. Second valve; 5043. Dosing hopper; 505. Protective cover; 6. Vapor recovery assembly; 601. Liquid storage tank; 602. Condenser; 603. Pressure regulating valve. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-12 The present invention provides a technical solution: an eye atomization therapeutic device, comprising a shell 1, the shell 1 comprises an outer shell 101, the opening part of the outer shell 101 is provided with an upper arc portion 102 and a lower fitting portion 103, the upper arc portion 102 and the lower fitting portion 103 can fit with the user's eyes, provide a comfortable wearing feeling, and effectively reduce the escape of atomized liquid, further, a flexible sealing pad is provided on the upper arc portion 102 and the lower fitting portion 103, which can not only improve the comfort, but also further improve the sealing effect.

[0024] Please refer to Figure 1 and Figure 2 A waste liquid collecting component 4 is arranged in the shell 101, and the waste liquid collecting component 4 includes a guide plate 401 fixed to the shell 101, a guide groove 402 is opened on the guide plate 401, the bottom of the shell 101 is connected with a collecting shell 403, the bottom of the collecting shell 403 is connected with a drain pipe 404, and a first valve 405 is installed on the drain pipe 404. The outer contour of the guide plate 401 is trapezoidal, and the side of the guide plate 401 close to the opening of the shell 101 is high, and the side of the guide plate 401 close to the collecting shell 403 is low, and then the drops dripping on the guide plate 401 will flow to the collecting shell 403 under the action of gravity, and the waste liquid can be collected centrally through the collecting shell 403. Open the first valve 405 and the waste liquid will be discharged from the drain pipe 404.

[0025] Please refer to Figure 1 , Figure 3 and Figure 4An atomizing mechanism 5 is arranged between the shell 101 and the steam heating mechanism 3. The atomizing mechanism 5 includes a medicine storage tank 501 fixed in the shell 101. An ultrasonic atomizer 502 is installed inside the medicine storage tank 501. The ultrasonic atomizer 502 converts electrical energy into mechanical energy by utilizing high-frequency oscillation of ultrasonic waves. When ultrasonic waves act on the medicine liquid, the surface tension of the liquid is destroyed, and the medicine liquid is stretched into tiny particles, thereby realizing atomization.

[0026] The outer side of the medicine storage tank 501 is provided with a protective cover 505, and the protective cover 505 serves to limit the heat transferred from the heating tube 306 to the medicine storage tank 501, so as to prevent the heating tube 306 from heating the medicine storage tank 501 to too high a temperature. The top of the medicine storage tank 501 is connected with a mist delivery pipe 503 and a dosing assembly 504, and the atomized medicine liquid will be output from the mist delivery pipe 503. The mist delivery pipe 503 is connected with the eye mask assembly 205 through the mounting assembly 201. The dosing assembly 504 includes a dosing pipe 5041 connected with the top of the medicine storage tank 501, and a dosing hopper 5043 is connected to the upper end of the medicine storage tank 501. A second valve 5042 is installed on the dosing pipe 5041, and the medicine liquid is conveniently added into the medicine storage tank 501 through the dosing hopper 5043. The second valve 5042 needs to be closed when in use.

[0027] Please refer to Figure 3 , Figure 4 , Figure 8 and Fig.12 A steam heating mechanism 3 is provided on the shell 101 and the massage mechanism 2. The steam heating mechanism 3 includes a small steam generator 301 fixed to the inner wall of the shell 101. The output end of the small steam generator 301 is connected to an input pipe 302. The output end of the input pipe 302 is connected to a mounting shell 303. The output end of the mounting shell 303 is connected to an output pipe 304. The output end of the output pipe 304 is connected to a connecting pipe 305. The output end of the connecting pipe 305 is connected to a heating pipe 306. The heating pipe 306 is wound around the atomization mechanism 5. The heating pipe 306 is heated by the steam inside the heating pipe 306. The protective cover 505 can be heated through the heating pipe 306, and then the medicine storage tank 501 and the medicine liquid inside the medicine storage tank 501 are heated through the protective cover 505.

[0028] Please refer to Figure 2 , Figure 3 and Fig.12The output end of the heating tube 306 is provided with a steam recovery component 6. Specifically, the steam recovery component 6 includes a liquid storage tank 601 fixed to the shell 101. The steam recovery component 6 also includes a condenser 602 connected to the output end of the heating tube 306. The output end of the condenser 602 is connected to the liquid storage tank 601. A pressure regulating valve 603 is installed on the liquid storage tank 601. The liquid storage tank 601 is connected to the input end of the small steam generator 301 through a pipeline. The condenser 602 can condense the steam transported to the condenser 602 by the heating tube 306, and the condensed water will be transported to the inside of the liquid storage tank 601 as a water source for the small steam generator 301. The pressure regulating valve 603 is set to adjust the pressure inside the liquid storage tank 601.

[0029] Please refer to Figures 3 to 11 A massage mechanism 2 is arranged in the outer shell 101, and the massage mechanism 2 includes a mounting assembly 201, and the mounting assembly 201 includes a special-shaped shell 2011 and an air vent 2012, and the air vent 2012 is provided on the side of the special-shaped shell 2011, and the mist delivery pipe 503 is connected to the special-shaped shell 2011, and a guide column 202 is rotatably connected to the mounting assembly 201, and a guide groove is provided on the guide column 202, and a connecting rod 203 is fixed on the guide column 202, and a turbine 204 is fixed on the connecting rod 203, and the turbine 204 is located inside the mounting shell 303.

[0030] Please refer to Figure 5 , Fig. 9 and Fig.10 The massage mechanism 2 also includes an eye mask assembly 205, which includes an eye mask shell 2051, a silicone pad 2052, an eye-shaped hollow ring 2053, and a swing hole 2054. The eye mask shell 2051 is fixed to the silicone pad 2052, the eye-shaped hollow ring 2053 is fixed to the eye mask shell 2051, and the swing hole 2054 is provided on the eye mask shell 2051 and the eye-shaped hollow ring 2053. A swing rod 206 is rotatably connected in the swing hole 2054, and the swing rod 206 contacts the guide groove on the guide column 202. An elastic massage component 207 is fixed to the right end of the swing rod 206. When the guide column 202 moves up and down, the guide column 202 will drive the swing rod 206 to swing through the guide groove on the guide column 202, and the other end of the swing rod 206 will move synchronously.

[0031] Please refer to Fig.11 Specifically, the elastic massage component 207 includes a massage block 2071, a slide rod 2072 is clamped on the massage block 2071, an elastic member 2073 is fixed on the slide rod 2072, the elastic member 2073 is fixed to the swing rod 206, the elastic member 2073 is a spring, and the material of the massage block 2071 is silicone. The elasticity of the deformation of the elastic member 2073 and the massage block 2071 can avoid the pain that may be caused by a hard massager.

[0032] Working principle: When in use, start the ultrasonic atomizer 502, the small steam generator 301, and the condenser 602. The start of the ultrasonic atomizer 502 will make the liquid medicine in the medicine storage tank 501 into mist, and output it through the mist delivery pipe 503. The start of the small steam generator 301 can generate steam, and the steam will be transported through the input pipe 302, the installation shell 303, the output pipe 304, the connecting pipe 305, and the heating pipe 306 in sequence. Finally, after being cooled by the condenser 602, the steam becomes liquid again and enters the liquid storage tank 601. In the above process, since the heating pipe 306 is wrapped around the protective cover 505, the heating pipe 306 can heat the liquid medicine in the medicine storage tank 501 that has not been atomized, so as to solve the problem that the viscosity increases due to its too low temperature and affects the atomization effect of the ultrasonic atomizer 502.

[0033] The start-up of the small steam generator 301 will turn the water inside the liquid storage tank 601 into steam. The steam generated by the small steam generator 301 will also drive the turbine 204 to rotate. The turbine 204 will drive the connecting rod 203 and the guide column 202 to rotate on the mounting assembly 201. Since the swing rod 206 is in sliding contact with the guide groove on the guide column 202, the rotation of the guide column 202 will cause the swing rod 206 to swing. Therefore, the swing rod 206 will drive the massage block 2071, the slide rod 2072, and the elastic member 2073 to swing. The massage block 2071 that swings up and down can massage the eyes, relieve muscle fatigue, and reduce the discomfort of the eyes due to long-term exposure to the atomized liquid.

[0034] When condensed droplets appear, the massage block 2071 that can swing up and down can be used to wipe the condensed droplets in the eyes, and the droplets will fall onto the guide plate 401. The condensed droplets can be guided by the cooperation of the guide plate 401 and the guide groove 402, so that the condensed droplets flow into the interior of the collection shell 403 along the guide groove 402. When cleaning is required, the first valve 405 can be opened to discharge the waste liquid inside the collection shell 403, thereby timely treating the condensed droplets in the eyes.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. An eye atomization therapeutic device, comprising a housing (1), wherein the housing (1) comprises an outer shell (101), characterized in that: A massage mechanism (2) is arranged in the shell (101), a steam heating mechanism (3) is arranged on the shell (101) and the massage mechanism (2), a waste liquid collection component (4) is arranged in the shell (101), and an atomization mechanism (5) is arranged between the shell (101) and the steam heating mechanism (3); The steam heating mechanism (3) comprises a small steam generator (301) fixed to the inner wall of the outer shell (101); the output end of the small steam generator (301) is connected to an input pipe (302); the output end of the input pipe (302) is connected to a mounting shell (303); the output end of the mounting shell (303) is connected to an output pipe (304); the output end of the output pipe (304) is connected to a connecting pipe (305); the output end of the connecting pipe (305) is connected to a heating pipe (306); the heating pipe (306) is wound around the atomizing mechanism (5); and the output end of the heating pipe (306) is provided with a steam recovery component (6); The massage mechanism (2) comprises a mounting assembly (201), the mounting assembly (201) being rotatably connected to a guide column (202), the guide column (202) being provided with a guide groove, a connecting rod (203) being fixed to the guide column (202), a turbine (204) being fixed to the connecting rod (203), and the turbine (204) being located inside the mounting shell (303); The massage mechanism (2) further comprises an eye mask assembly (205), wherein the eye mask assembly (205) comprises an eye mask shell (2051), a silicone pad (2052), an eye-shaped hollow ring (2053), and a swing hole (2054); a swing rod (206) is rotatably connected in the swing hole (2054), and the swing rod (206) is in contact with a guide groove on the guide column (202); and an elastic massage component (207) is fixed to the right end of the swing rod (206).

2. The eye atomization therapeutic device according to claim 1, characterized in that: The waste liquid collection assembly (4) comprises a guide plate (401) fixed to the outer shell (101), a guide groove (402) being provided on the guide plate (401), a collection shell (403) being connected to the bottom of the outer shell (101), a drainage pipe (404) being connected to the bottom of the collection shell (403), and a first valve (405) being installed on the drainage pipe (404).

3. The eye atomization therapeutic device according to claim 1, characterized in that: The atomization mechanism (5) comprises a medicine storage tank (501) fixed in the housing (101), an ultrasonic atomizer (502) is installed inside the medicine storage tank (501), a protective sleeve (505) is provided on the outer side of the medicine storage tank (501), a mist delivery pipe (503) and a medicine adding assembly (504) are connected at the top of the medicine storage tank (501), and the mist delivery pipe (503) is connected to the eye mask assembly (205) through the mounting assembly (201).

4. The eye atomization therapeutic device according to claim 3, characterized in that: The drug adding assembly (504) comprises a drug adding pipe (5041) connected to the top of the drug storage tank (501), the upper end of the drug storage tank (501) is connected to a drug adding hopper (5043), and a second valve (5042) is installed on the drug adding pipe (5041).

5. The eye atomization therapeutic device according to claim 1, characterized in that: The steam recovery component (6) comprises a liquid storage tank (601) fixed to the housing (101), and the steam recovery component (6) further comprises a condenser (602) connected to the output end of the heating tube (306), the output end of the condenser (602) is connected to the liquid storage tank (601), a pressure regulating valve (603) is installed on the liquid storage tank (601), and the liquid storage tank (601) is connected to the input end of the small steam generator (301) through a pipeline.

6. The eye atomization therapeutic device according to claim 3, characterized in that: The mounting assembly (201) comprises a special-shaped shell (2011) and an air vent (2012), wherein the air vent (2012) is provided on a side of the special-shaped shell (2011), and the mist delivery pipe (503) is connected to the special-shaped shell (2011).

7. The eye atomization therapeutic device according to claim 1, characterized in that: The eye mask shell (2051) is fixed to the silicone pad (2052), the eye-shaped hollow ring (2053) is fixed to the eye mask shell (2051), and the swing hole (2054) is provided on the eye mask shell (2051) and the eye-shaped hollow ring (2053).

8. The eye atomization therapeutic device according to claim 1, characterized in that: The elastic massage component (207) comprises a massage block (2071), a slide bar (2072) is clamped on the massage block (2071), an elastic member (2073) is fixed on the slide bar (2072), and the elastic member (2073) is fixed to the swing rod (206).

9. The eye atomization therapeutic device according to claim 8, characterized in that: The elastic member (2073) is a spring, and the massage block (2071) is made of silicone.

10. The eye atomization therapeutic device according to claim 1, characterized in that: The opening portion of the housing (101) is provided with an upper arc-shaped portion (102) and a lower fitting portion (103).

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