Voice broadcasting apparatus for foreign language teaching for cross-cultural communication

Abstract

A voice broadcasting apparatus for foreign language teaching for cross-cultural communication. A dustproof mesh main body (2) is mounted on a broadcasting apparatus main body (1). A negative pressure suction fan (30) and a moving plate (11) are mounted in the broadcasting apparatus main body (1). A brush (19) is arranged on the moving plate (11); a connecting plate (20) is arranged on a side face of the moving plate (11); and the connecting plate (20) is connected to a screw rod (21). Debris such as dust and fluff suctioned up by an outer dust suction pipe (16) and debris such as dust on a diaphragm that is suctioned up by an inner dust suction pipe (15) are all suctioned into a dustproof bag (34) on a dust collection box (33) through a fixed pipe (14) and a connecting pipe (17), thereby achieving a dust removal operation for the broadcasting apparatus main body (1), preventing the phenomenon of sound distortion caused by debris such as dust adhering to the diaphragm, and also preventing the phenomenon of audio equipment damage caused by people manually cleaning debris such as dust on the diaphragm.

Description

A voice broadcasting device for foreign language teaching in cross-cultural communication Technical Field

[0001] The present invention relates to the technical field of voice broadcast equipment, in particular to a voice broadcast equipment for foreign language teaching used in cross-cultural communication. Background Art

[0002] Voice broadcasting equipment is an advanced technical tool that can convert text information into clear and natural voice output in real time. It is widely used in education, transportation, medical care, smart home and other fields. It not only improves the efficiency and convenience of information transmission, but also can simulate multiple languages ​​and intonations to adapt to the needs of different scenarios, greatly enhancing the user experience and the diversity of application scenarios.

[0003] In the prior art, voice broadcasting equipment used in foreign language teaching for cross-cultural communication is usually equipped with a dustproof net to prevent dust from entering the speaker and adhering to the diaphragm, causing sound distortion or poor response.

[0004] However, traditional voice broadcasting equipment is usually installed at a high place in the teaching room. After the voice broadcasting equipment is used for a long time, the dustproof net on the voice broadcasting equipment will be covered with dust, and personnel need to clean it regularly, which is inconvenient for personnel to use. Some of the dust will still enter the interior of the speaker through the holes in the dustproof net and adhere to the diaphragm, causing sound distortion. Personnel also need to remove the dustproof net to clean the diaphragm, which is complicated and inconvenient for personnel to use. In addition, the diaphragm may be damaged during the cleaning process, which in turn causes damage to the voice broadcasting equipment, making it inconvenient for personnel to use. For this reason, the present invention proposes a voice broadcasting equipment for foreign language teaching in cross-cultural communication to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a foreign language teaching voice broadcasting device for cross-cultural communication to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a voice broadcasting device for foreign language teaching for cross-cultural communication, comprising a dustproof net main body, the dustproof net main body being mounted on the broadcasting device main body, a negative pressure suction fan being mounted in the broadcasting device main body, a movable plate being provided in the broadcasting device main body, a brush and a fixed tube being provided on the movable plate, a plurality of inner dust suction tubes, a plurality of outer dust suction tubes and a connecting tube being provided on the fixed tube, the other end of the connecting tube extending into an installation slot, a dust collection box being mounted in the installation slot, and a dust bag being provided on the dust collection box;

[0007] The movable plate has a connecting plate on its side, and the threaded holes on the connecting plate are connected to the screw rods.

[0008] Preferably, the connecting plate is a square plate-shaped structure, the connecting plate is fixedly connected to the movable plate, the movable plate is a square plate-shaped structure, a side limit block is fixedly connected to the side of the movable plate, the side limit block is a "convex" plate-shaped structure, the side limit block can slide along the side limit groove opened on the inner side of the broadcasting equipment body, and the side limit groove is a "convex" groove-shaped structure.

[0009] Preferably, the threaded hole on the connecting plate is threadedly connected to the screw, one end of the screw is rotatably connected to the broadcasting equipment body, and the other end is fixedly connected to the worm gear, the worm gear is rotatably connected to the broadcasting equipment body through a rotating shaft, a motor is fixedly installed in the broadcasting equipment body, the motor drive shaft is fixedly connected to the worm, and the worm and the worm gear are meshed for transmission.

[0010] Preferably, a brush and a fixed tube are fixedly mounted on the movable plate, a plurality of inner dust suction tubes and an outer dust suction tube are fixedly connected to the fixed tube, and the outer dust suction tube is also fixedly mounted on the movable plate.

[0011] Preferably, the fixed tube is fixedly connected to the connecting tube, the middle section of the connecting tube is fixedly connected to the limiting mechanism, the limiting mechanism is a square plate-shaped structure, the limiting mechanism is fixedly connected to the broadcasting equipment body, a dustproof net body is installed on the broadcasting equipment body, an outer card block and an inner card block are fixedly connected to the dustproof net body, the inner card block is an "L"-shaped plate structure, the inner card block can be inserted into the inner card slot opened in the broadcasting equipment body, and the inner card slot is a square slot-shaped structure.

[0012] Preferably, the installation groove is a square groove structure, a dust box is stuck in the installation groove, a dust bag is fixedly installed in the dust box, a plurality of ventilation grooves are opened on the side of the dust bag, and the ventilation grooves are connected to the suction port of the negative pressure suction fan fixedly installed in the main body of the broadcasting equipment.

[0013] Preferably, a positioning block is fixedly connected to the side of the dust box, and the positioning block is a square plate-shaped structure. The positioning block can be stuck in a square groove-shaped positioning groove opened on the main body of the broadcasting device. A lower limit groove is opened on the main body of the broadcasting device, and the lower limit groove is a "convex" groove-shaped structure. A thrust spring is arranged in the lower limit groove, and one end of the thrust spring is fixedly connected to the main body of the broadcasting device, and the other end is fixedly connected to the pull plate.

[0014] Preferably, the external clamping block is in the form of a "convex" plate-shaped structure, and the external clamping block can be inserted into the external clamping groove in the form of a "convex" groove provided on the main body of the broadcasting device. A slide groove is provided on the main body of the broadcasting device, and the slide groove is in the form of a "convex" groove. An elastic spring is provided in the slide groove, and one end of the elastic spring is fixedly connected to the main body of the broadcasting device and the other end is fixedly connected to the slider. The slider is provided in the slide groove and can slide along the slide groove, and the slider is fixedly connected to the lower limit block.

[0015] Preferably, the pull plate is a combination of a square plate and a "convex" plate, the "convex" plate portion on the pull plate is stuck in the lower limit groove and can slide along the lower limit groove, and a locking block is fixedly connected to the pull plate, the locking block is a right-angled trapezoidal plate structure, one end of the locking block can be stuck in the locking groove opened on the side of the dust box, and the locking groove is a square groove structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention proposes a foreign language teaching voice broadcasting device for cross-cultural communication. The screw is rotated along the threaded hole opened in the connecting plate to make the movable plate slide up and down along the side limit groove, so that the brush brushes the inner side of the dustproof net main body, and the negative pressure suction fan draws air to form negative pressure, so that the outer dust suction pipe absorbs dust, fluff and other debris, and the dust and other debris on the diaphragm are absorbed by the inner dust suction pipe, and are absorbed into the dustproof bag on the dust collecting box through the fixed pipe and the connecting pipe. The dust removal operation of the broadcasting device main body is achieved in the above manner, and the phenomenon of sound distortion caused by dust and other debris adhering to the diaphragm and the phenomenon of response deterioration caused by dust and other debris adhering to the dustproof net main body is avoided. It is beneficial to foreign language teaching, does not require manual cleaning by personnel, is convenient for personnel to use, is simple to operate, and avoids the phenomenon of manual cleaning of dust and other debris on the diaphragm and thus damage to the sound. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic diagram of the structure of the device of the present invention;

[0019] FIG2 is a schematic diagram of the installation of the device of the present invention during normal use;

[0020] FIG3 is an enlarged structural diagram of point A in FIG2 ;

[0021] FIG4 is a schematic diagram of the internal structure of the device of the present invention;

[0022] FIG5 is an enlarged structural diagram of point B in FIG4 ;

[0023] FIG6 is a schematic diagram of the internal structure of the device of the present invention;

[0024] FIG7 is an enlarged structural diagram of point C in FIG6;

[0025] FIG8 is a partial schematic diagram of the internal structure of the device of the present invention;

[0026] FIG9 is an enlarged structural diagram of point D in FIG8 ;

[0027] FIG10 is a schematic diagram of a partial structure of the device of the present invention;

[0028] FIG11 is a schematic diagram of a partial structure of the device of the present invention.

[0029] In the figure: 1. Broadcasting device body; 2. Dustproof net body; 3. Inner clamping block; 4. Outer clamping block; 5. Inner clamping slot; 6. Outer clamping slot; 7. Slide slot; 8. Elastic spring; 9. Slider; 10. Lower limit block; 11. Moving plate; 12. Side limit block; 13. Side limit slot; 14. Fixed pipe; 15. Inner dust suction pipe; 16. Outer dust suction pipe; 17. Connecting pipe; 18. Limiting mechanism; 19. Brush; 20. Connecting plate; 21. Screw; 22. Worm gear; 23. Worm; 24. Motor; 25. Lower limit slot; 26. Thrust spring; 27. Pull plate; 28. Locking block; 29. ​​Mounting slot; 30. Negative pressure suction fan; 31. Positioning slot; 32. Positioning block; 33. Dust collection box; 34. Dust bag; 35. Ventilation slot; 36. Locking slot. DETAILED DESCRIPTION

[0030] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit 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. Example 1

[0031] Referring to Figures 1 to 11, the present invention provides a technical solution: a voice broadcasting device for foreign language teaching for cross-cultural communication, comprising a dustproof net main body 2, the dustproof net main body 2 being mounted on a broadcasting device main body 1, a negative pressure suction fan 30 being mounted in the broadcasting device main body 1, a movable plate 11 being mounted in the said broadcasting device main body 1, a brush 19 and a fixed tube 14 being mounted on the movable plate 11, a plurality of inner dust suction tubes 15, a plurality of outer dust suction tubes 16 and a connecting tube 17 being mounted on the fixed tube 14, the other end of the connecting tube 17 extending into a mounting groove 29, a dust collecting box 33 being mounted in the mounting groove 29, a dust collecting box 33 being mounted on the dust collecting box 33, a dust bag 34 being mounted; a movable plate 11, a connecting plate 20 being mounted on the side of the movable plate 11, a threaded hole provided on the connecting plate 20 being connected to a screw 21;

[0032] When in use, the device can automatically remove dust, including removing dust from the diaphragm, making it easier for people to use. Example 2

[0033] On the basis of the first embodiment, in order to realize automatic dust removal of the device, a mounting slot 29 is provided. The mounting slot 29 is a square slot-shaped structure. A dust box 33 is clamped in the mounting slot 29. A dust bag 34 is fixedly installed in the dust box 33. A plurality of ventilation slots 35 are provided on the side of the dust bag 34. The ventilation slots 35 are connected to the suction port of the negative pressure suction fan 30 fixedly installed in the main body 1 of the broadcasting device. By starting the negative pressure suction fan 30 to extract air, a negative pressure is formed. The air flows from the dust bag 34 in the dust box 33 through the ventilation slots 35 opened on the dust box 33 into the suction port of the negative pressure suction fan 30, so that the air can be exhausted through the connecting pipe 17, which is convenient for subsequent dust removal operations.

[0034] The threaded hole provided on the connecting plate 20 is threadedly connected to the screw 21. One end of the screw 21 is rotatably connected to the broadcasting device body 1, and the other end is fixedly connected to the worm gear 22. The worm gear 22 is rotatably connected to the broadcasting device body 1 through a rotating shaft. A motor 24 is fixedly installed in the broadcasting device body 1. The drive shaft of the motor 24 is fixedly connected to the worm 23. The worm 23 is meshed with the worm gear 22 for transmission. By starting the motor 24 to drive the worm 23 to rotate, and the worm gear 22 is meshed with the worm 23 for transmission, the worm gear 22 is driven to rotate, so that the screw 21 rotates, and the screw 21 rotates along the threaded hole provided on the connecting plate 20.

[0035] The connecting plate 20 is a square plate-shaped structure. The connecting plate 20 is fixedly connected to the movable plate 11. The movable plate 11 is a square plate-shaped structure. A side limit block 12 is fixedly connected to the side of the movable plate 11. The side limit block 12 is a "convex" plate-shaped structure. The side limit block 12 can slide along the side limit groove 13 opened on the inner side of the broadcasting device body 1. The side limit groove 13 is a "convex" groove-shaped structure, so that the movable plate 11 and the side limit block 12 slide up and down along the side limit groove 13;

[0036] A brush 19 and a fixed tube 14 are fixedly mounted on the movable plate 11. A plurality of inner dust suction tubes 15 and an outer dust suction tube 16 are fixedly connected to the fixed tube 14. The outer dust suction tube 16 is also fixedly mounted on the movable plate 11. The brush 19 brushes the inner side of the dust screen body 2, and absorbs dust, lint, and other debris through the outer dust suction tube 16. The dust and other debris on the diaphragm are absorbed through the inner dust suction tube 15 and then absorbed into the dust bag 34 on the dust collection box 33 through the fixed tube 14 and the connecting tube 17.

[0037] The dust box 33 is fixedly connected to the side of the positioning block 32, which is a square plate-shaped structure. The positioning block 32 can be stuck in the square groove-shaped positioning groove 31 on the broadcasting device body 1. The broadcasting device body 1 is provided with a lower limit groove 25, which is a "convex" groove-shaped structure. A thrust spring 26 is provided in the lower limit groove 25. One end of the thrust spring 26 is fixedly connected to the broadcasting device body 1, and the other end is fixedly connected to the pull plate 27. The personnel only need to regularly remove the dust collector. The dust box 33 can be removed to pour out the dust and other debris therein, making it easier for personnel to use. The positioning block 32 fixedly connected to the side of the dust box 33 can be snapped into the positioning groove 31, which serves as a positioning mechanism to facilitate personnel to install the dust box 33. The staff can pull the pull plate 27 to disengage the locking block 28 from the locking groove 36 provided on the side of the dust box 33, thereby releasing the lock of the dust box 33. The staff can then remove the dust box 33 and clean the dust box 33 and the dust bag 34;

[0038] The pull plate 27 is a combination of a square plate and a "convex" plate. The "convex" plate part of the pull plate 27 is stuck in the lower limit groove 25 and can slide along the lower limit groove 25. A locking block 28 is fixedly connected to the pull plate 27. The locking block 28 is a right-angled trapezoidal plate structure. One end of the locking block 28 can be stuck in the locking groove 36 opened on the side of the dust box 33. The locking groove 36 is a square groove structure. Similarly, the personnel can align the dust box 33 with the positioning groove 31 opened on the broadcasting device body 1 and insert it so that one end of the dust box 33 is stuck in the installation groove 29, and this During the process, the side of the dust box 33 squeezes the inclined surface of the locking block 28, causing the locking block 28 and the pull plate 27 to slide along the lower limit groove 25, compressing the thrust spring 26. When the dust box 33 is completely installed on the broadcasting device body 1, the locking groove 36 opened on the side of the dust box 33 is aligned with the locking block 28, and the thrust spring 26 pushes the locking block 28 to slide along the lower limit groove 25, causing the locking block 28 to be stuck in the locking groove 36. By limiting the dust box 33 in the above way, the dust box 33 can be installed on the broadcasting device body 1. The structure is simple and convenient for people to use. Example 3

[0039] On the basis of the second embodiment, in order to facilitate the later use of personnel, an external card block 4 is provided. The external card block 4 is a "convex" plate-shaped structure. The external card block 4 can be inserted into the external card slot 6 in the "convex" groove shape opened on the main body 1 of the broadcasting device. A slide slot 7 is provided on the main body 1 of the broadcasting device. The slide slot 7 is a "convex" groove-shaped structure. An elastic spring 8 is provided in the slide slot 7. One end of the elastic spring 8 is fixedly connected to the main body 1 of the broadcasting device and the other end is fixedly connected to the slider 9. The slider 9 is arranged in the slide slot 7 and can slide along the slide slot 7. The slider 9 is in contact with the lower limit The positioning block 10 is fixedly connected, and the lower limit block 10 is a "convex" plate-shaped structure. One side of the lower limit block 10 contacts the outer card block 4, and the outer card block 4 is limited by the lower limit block 10, and one end of the inner card block 3 is stuck in the inner card groove 5 to jointly limit the dustproof net body 2. The elastic spring 8 is in a taut state. The user can pull the lower limit block 10 to make the slider 9 slide along the slide groove 7 to compress the elastic spring 8, so that the lower limit block 10 is no longer in contact with the outer card block 4, thereby releasing the lock on the outer card block 4 and the dustproof net body 2;

[0040] The fixed tube 14 is fixedly connected to the connecting tube 17, the middle section of the connecting tube 17 is fixedly connected to the limiting mechanism 18, the limiting mechanism 18 is a square plate structure, the limiting mechanism 18 is fixedly connected to the broadcasting device main body 1, and a dustproof net main body 2 is installed on the broadcasting device main body 1, and an outer card block 4 and an inner card block 3 are fixedly connected to the dustproof net main body 2. The inner card block 3 is an "L"-shaped plate structure, and the inner card block 3 can be inserted into the inner card slot 5 opened in the broadcasting device main body 1. The inner card slot 5 is a square slot structure, and personnel can slide downward to disengage the inner card block 3 from the inner card slot 5 and disengage the outer card block 4 from the outer card slot 6, so that the dustproof net main body 2 can be removed. The structure is simple and convenient for actual use by personnel.

[0041] Working principle: During actual use, the screw 21 is rotated along the threaded hole on the connecting plate 20, so that the movable plate 11 slides up and down along the side limit groove 13, so that the brush 19 brushes the inner side of the dustproof net main body 2, and the negative pressure suction fan 30 draws air to form negative pressure, so that the outer dust suction pipe 16 absorbs dust, fluff and other debris, and absorbs dust and other debris on the diaphragm through the inner dust suction pipe 15, and is absorbed into the dust bag 34 on the dust collecting box 33 through the fixed pipe 14 and the connecting pipe 17. The dust removal operation of the broadcasting equipment main body 1 is achieved in the above way, avoiding the phenomenon of dust and other debris adhering to the diaphragm to cause sound distortion, and the phenomenon of dust and other debris adhering to the dustproof net main body 2 to cause the response to deteriorate, which is beneficial to foreign language teaching, does not require manual cleaning, is convenient for personnel to use, is simple to operate, and avoids the phenomenon of manual cleaning of dust and other debris on the diaphragm and thus causing damage to the sound.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A voice broadcasting device for foreign language teaching for cross-cultural communication, comprising a dustproof net body (2), the dustproof net body (2) being mounted on a broadcasting device body (1), a negative pressure suction fan (30) being mounted in the broadcasting device body (1), and characterized in that: The broadcasting device body (1) is provided with a movable plate (11), the movable plate (11) is provided with a brush (19) and a fixed tube (14), the fixed tube (14) is provided with a plurality of inner dust suction tubes (15), a plurality of outer dust suction tubes (16) and a connecting tube (17), the other end of the connecting tube (17) extends into the mounting groove (29), a dust collecting box (33) is installed in the mounting groove (29), and a dust bag (34) is provided on the dust collecting box (33); A movable plate (11) is provided with a connecting plate (20) on the side of the movable plate (11), and a threaded hole provided on the connecting plate (20) is connected to the screw rod (21).

2. The cross-cultural communication foreign language teaching voice broadcasting device according to claim 1, characterized in that: The connecting plate (20) is in a square plate-like structure. The connecting plate (20) is fixedly connected to the movable plate (11). The movable plate (11) is in a square plate-like structure. A side limit block (12) is fixedly connected to the side of the movable plate (11). The side limit block (12) is in a "convex" plate-like structure. The side limit block (12) can slide along a side limit groove (13) provided on the inner side of the broadcasting device body (1). The side limit groove (13) is in a "convex" groove-like structure.

3. The cross-cultural communication foreign language teaching voice broadcasting device according to claim 1, characterized in that: The threaded hole formed on the connecting plate (20) is threadedly connected to the screw (21). One end of the screw (21) is rotationally connected to the broadcasting device body (1), and the other end is fixedly connected to the worm gear (22). The worm gear (22) is rotationally connected to the broadcasting device body (1) via a rotating shaft. A motor (24) is fixedly installed in the broadcasting device body (1). The transmission shaft of the motor (24) is fixedly connected to the worm gear (23). The worm gear (23) and the worm gear (22) are meshed for transmission.

4. The cross-cultural communication foreign language teaching voice broadcasting device according to claim 1, characterized in that: A brush (19) and a fixed tube (14) are fixedly mounted on the movable plate (11); a plurality of inner dust suction tubes (15) and an outer dust suction tube (16) are fixedly connected to the fixed tube (14); and the outer dust suction tube (16) is also fixedly mounted on the movable plate (11).

5. The cross-cultural communication foreign language teaching voice broadcasting device according to claim 1, characterized in that: The fixed tube (14) is fixedly connected to the connecting tube (17), the middle section of the connecting tube (17) is fixedly connected to the limiting mechanism (18), the limiting mechanism (18) is in a square plate-shaped structure, the limiting mechanism (18) is fixedly connected to the broadcasting device body (1), a dustproof net body (2) is installed on the broadcasting device body (1), an outer card block (4) and an inner card block (3) are fixedly connected to the dustproof net body (2), the inner card block (3) is in an "L"-shaped plate-shaped structure, the inner card block (3) can be inserted into an inner card slot (5) provided in the broadcasting device body (1), and the inner card slot (5) is in a square slot-shaped structure.

6. The cross-cultural communication foreign language teaching voice broadcasting device according to claim 1, characterized in that: The mounting groove (29) is a square groove-shaped structure. A dust collecting box (33) is clamped in the mounting groove (29). A dust bag (34) is fixedly installed in the dust collecting box (33). A plurality of ventilation grooves (35) are opened on the side of the dust bag (34). The ventilation grooves (35) are connected to the suction port of a negative pressure suction fan (30) fixedly installed in the main body (1) of the broadcasting device.

7. The cross-cultural communication foreign language teaching voice broadcasting device according to claim 1, characterized in that: A positioning block (32) is fixedly connected to the side of the dust collecting box (33), and the positioning block (32) is in a square plate-shaped structure. The positioning block (32) can be inserted into a positioning groove (31) in a square groove shape provided on the main body (1) of the broadcasting device. A lower limit groove (25) is provided on the main body (1), and the lower limit groove (25) is in a "convex" groove-shaped structure. A thrust spring (26) is provided in the lower limit groove (25), and one end of the thrust spring (26) is fixedly connected to the main body (1) of the broadcasting device, and the other end is fixedly connected to the pull plate (27).

8. The cross-cultural communication foreign language teaching voice broadcasting device according to claim 5, characterized in that: The external card block (4) is in a convex plate-like structure. The external card block (4) can be inserted into an external card slot (6) in a convex groove-like structure provided on the broadcasting device body (1). A slide slot (7) is provided on the broadcasting device body (1). The slide slot (7) is in a convex groove-like structure. An elastic spring (8) is provided in the slide slot (7). One end of the elastic spring (8) is fixedly connected to the broadcasting device body (1) and the other end is fixedly connected to the slider (9). The slider (9) is provided in the slide slot (7) and can slide along the slide slot (7). The slider (9) is fixedly connected to the lower limit block (10).

9. The cross-cultural communication foreign language teaching voice broadcasting device according to claim 7, characterized in that: The pull plate (27) is a combination of a square plate and a "convex" plate. The "convex" plate portion of the pull plate (27) is stuck in the lower limit groove (25) and can slide along the lower limit groove (25). A locking block (28) is fixedly connected to the pull plate (27). The locking block (28) is a right-angled trapezoidal plate structure. One end of the locking block (28) can be stuck in a locking groove (36) provided on the side of the dust box (33). The locking groove (36) is a square groove structure.

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