Feeding equipment for assembly of windshield wiper clips

By designing feeding equipment for wiper clip assembly, including feeding components, feeding components, switch components and touch all-in-one machines, the problem of congestion caused by excessive feeding of existing equipment is solved, and the effect of stable operation is achieved.

CN222475281UActive Publication Date: 2025-02-14HEBEI AOYUE AUTO PARTS CO LTD
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Patent Information

Application Number
CN202421372389.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-17
Publication Date
2025-02-14
Estimated Expiration
2034-06-17

AI Technical Summary

Technical Problem

The existing feeding equipment assembled with wiper clips is prone to excessive feeding, resulting in congestion in the equipment and inability to operate normally.

Method used

A feeding device including a feeding assembly, a feeding assembly, a switch assembly and a touch all-in-one machine is designed. The feeding assembly is used to convey the wiper clip, the feeding assembly is used to feed above the feeding assembly, the switch assembly controls the output of the feeding assembly, and the touch all-in-one machine is used to control the feeding assembly and the switch assembly.

Benefits of technology

Through the design of this equipment, the conveying volume of wiper clips can be effectively controlled, prevent congestion in the cavity of the feeding assembly, and ensure stable operation of the equipment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a feeding device for assembly of windshield wiper clips, and relates to the technical field of windshield wipers, the feeding device for assembly of the windshield wiper clips comprises a feeding assembly, and the feeding assembly is used for conveying the windshield wiper clips; the feeding assembly is arranged over the feeding assembly, and the feeding assembly is used for feeding materials into an inner cavity of the feeding assembly. The switch assembly is arranged on the surface of the bottom of the output end of the feeding assembly, and the switch assembly is used for controlling a clamp for feeding in an inner cavity of the feeding assembly; according to the automatic feeding device for the windshield wiper clips, the windshield wiper clips can be conveyed, the windshield wiper clips can be conveniently added, the adding amount of the windshield wiper clips can be controlled, therefore, congestion caused by excessive adding of the windshield wiper clips can be prevented, and stable operation of equipment can be guaranteed.
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Description

Technical Field

[0001] The utility model relates to the technical field of windshield wipers, in particular to a feeding device used for assembling windshield wiper clips. Background Art

[0002] Windshield wipers are a device on cars, trucks, buses and other vehicles. Depending on the model of the vehicle, the number and form of wipers may also vary. For example, some vehicles are equipped with double wipers, while others use boneless wipers. The wiper clip is a component that fixes the car wiper. It is usually located at the end of the wiper arm and is used to firmly mount the wiper on the windshield. The design of the wiper clip can ensure that the wiper will not fall off due to vibration or wind during driving, ensuring a clear view while driving.

[0003] Although the existing feeding equipment for assembling wiper clips can feed materials, it is easy to feed too much material, which can easily cause congestion and thus make the equipment unable to operate. Therefore, we propose a feeding equipment for assembling wiper clips to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a feeding device for assembling a wiper clip, which solves the problem of easily adding too much material.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a feeding device for assembling wiper clips, comprising a feeding assembly, wherein the feeding assembly is used to convey the wiper clips;

[0006] A feeding assembly, which is arranged directly above the feeding assembly and is used to feed the inner cavity of the feeding assembly;

[0007] A switch assembly, the switch assembly is arranged on the bottom surface of the output end of the feeding assembly, and the switch assembly is used to control the clip for feeding the inner cavity of the feeding assembly; and

[0008] A touch all-in-one machine, wherein the touch all-in-one machine is arranged on a surface of one side of the feeding component.

[0009] Preferably, the feeding assembly includes a conveying plate, a vibrator is arranged at a center position on the bottom surface of the conveying plate, a support column is arranged on the bottom surface of the conveying plate, a conveying pipe is arranged on one side of the top surface of the conveying plate, a guide rail is arranged at a center position on the bottom surface of the inner cavity of the conveying pipe, and a drop hole is opened on the bottom surface of the inner cavity of the conveying pipe and close to one end of the guide rail; a limiting tube is arranged at one end of the conveying pipe, support plates are arranged on both sides of the bottom surface of the conveying plate, and the top surface of the support plate is connected to the feeding assembly.

[0010] Preferably, a guide plate is provided on the bottom surface of the conveying pipe near the drop hole, and the guide plate is used to guide the dropped clip.

[0011] Preferably, a mounting groove is provided at a central position of the bottom of the inner cavity of the conveying tray, and a rotating part is provided in the inner cavity of the mounting groove.

[0012] Preferably, the rotating part comprises a rotating table, a rotating column is arranged on the top surface of the rotating table, and a rotating plate is arranged on one side surface of the rotating column.

[0013] Preferably, the feeding assembly includes a gantry, which is arranged on the top surface of the support plate, a feed pipe is arranged at the center of the top surface of the gantry, a conical tube is arranged on the bottom surface of the feed pipe, and a material containing pipe is arranged on the top surface of the feed pipe.

[0014] Preferably, the switch assembly includes a connecting plate, which is arranged in the inner cavity of the gantry, a discharge hole is provided on the top surface of the connecting plate, a movable groove is provided at a center position on one side surface of the connecting plate, a baffle is provided in the inner cavity of the movable groove, electric linear slides are provided at the center position of both side walls of the movable groove, two output ends of the electric linear slides are connected to the two side surfaces of the baffle, and a guide tube is provided at a lower position in the inner cavity of the discharge hole.

[0015] Beneficial Effects

[0016] The utility model provides a feeding device for assembling wiper clips. Compared with the prior art, the utility model has the following beneficial effects:

[0017] The feeding device for assembling wiper clips, when it is necessary to transport the wiper clips, firstly places the feeding component at a preset position, and then fixes the feeding component to be connected directly above the feeding component, so that the feeding component can provide support for the feeding component, and then the staff can add the wiper clips into the inner cavity of the feeding component, so that the feeding component can add the wiper clips in the inner cavity into the inner cavity of the feeding component, and then the feeding component is controlled by the touch all-in-one machine, so that the feeding component can vibrate the wiper clips in the inner cavity of the feeding component, and then the feeding component can transport the wiper clips, so that the wiper clips can be transported to the preset position, because the bottom surface of the output end of the feeding component is fixedly connected with the switch component, so that the feeding component can provide support for the switch component, and the switch component is controlled by the touch all-in-one machine, so that the switch component can block and open the output end of the feeding component, and then the amount of wiper clips transported at the output end of the feeding component can be controlled, so as to prevent congestion in the inner cavity of the feeding component. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall side structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the feeding assembly of the utility model;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the feeding component of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the rotating part of the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the feeding component of the utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the switch assembly of the utility model.

[0025] In the figure: 1. Feeding assembly; 11. Conveying disc; 12. Vibrator; 13. Support column; 14. Conveying pipe; 15. Guide rail; 16. Drop hole; 17. Limiting pipe; 18. Support plate; 19. Guide plate, 110 mounting slot; 111. Rotating part; 1111. Rotating table; 1112. Rotating column; 1113. Rotating plate; 2. Feeding assembly; 21. Gantry; 22. Feeding pipe; 23. Conical pipe; 24. Feeding pipe; 3. Switch assembly; 31. Connecting plate; 32. Discharging hole; 33. Baffle; 34. Electric linear slide; 35. Guide pipe; 4. Touch all-in-one machine. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-7 The utility model provides a technical solution: a feeding device for assembling wiper clips, comprising a feeding component 1, the feeding component 1 is used to transport the wiper clips; a feeding component 2, the feeding component 2 is arranged directly above the feeding component 1, and the feeding component 2 is used to feed the inner cavity of the feeding component 1; a switch component 3, the switch component 3 is arranged on the bottom surface of the output end of the feeding component 2, and the switch component 3 is used to control the clip feeding the inner cavity of the feeding component 2; and a touch all-in-one machine 4, the touch all-in-one machine 4 is arranged on one side surface of the feeding component 2;

[0028] When it is necessary to transport the wiper clip, first place the feeding component 1 at the preset position, and then fix the feeding component 2 to be directly above the feeding component 1, so that the feeding component 1 can provide support for the feeding component 2, and then the staff can add the wiper clip to the inner cavity of the feeding component 2, so that the feeding component 2 can add the wiper clip in the inner cavity to the inner cavity of the feeding component 1, and then control the feeding component 1 through the touch all-in-one machine 4, so that the feeding component 1 can vibrate the wiper clip in the inner cavity of the feeding component 1, and then the feeding component 1 can transport the wiper clip, so that the wiper clip can be transported to the preset position, because the bottom surface of the output end of the feeding component 2 is fixedly connected with the switch component 3, so that the feeding component 2 can provide support for the switch component 3, and the switch component 3 is controlled by the touch all-in-one machine 4, so that the switch component 3 can block and open the output end of the feeding component 2, and then the amount of wiper clip transported at the output end of the feeding component 2 can be controlled, so as to prevent congestion in the inner cavity of the feeding component 1.

[0029] See also Figure 1-5 The feeding assembly 1 includes a conveying plate 11, a vibrator 12 is arranged at the center of the bottom surface of the conveying plate 11, a support column 13 is arranged at the bottom surface of the conveying plate 11, a conveying pipe 14 is arranged on one side of the top surface of the conveying plate 11, a guide rail 15 is arranged at the center of the bottom surface of the inner cavity of the conveying pipe 14, a drop hole 16 is opened on the bottom surface of the inner cavity of the conveying pipe 14 and close to one end of the guide rail 15; a limit tube 17 is arranged at one end of the conveying pipe 14, and support plates 18 are arranged on both sides of the bottom surface of the conveying plate 11. The top surface of the support plate 18 is connected to the feeding assembly 2, and a guide plate 19 is provided on the bottom surface of the conveying pipe 14 and near the drop hole 16. The guide plate 19 is used to guide the dropped clips. A mounting groove 110 is provided at the center of the bottom of the inner cavity of the conveying disc 11. A rotating part 111 is provided in the inner cavity of the mounting groove 110. The rotating part 111 includes a rotating table 1111. A rotating column 1112 is provided on the top surface of the rotating table 1111, and a rotating plate 1113 is provided on one side surface of the rotating column 1112.

[0030] The conveying disc 11 in the feeding assembly 1 can be placed in a preset position and provide a mounting base for the vibrator 12, so that the conveying disc 11 can provide support for the vibrator 12, and then the vibrator 12 can provide vibration for the conveying disc 11, so that the conveying disc 11 can convey the wiper clip. Since the bottom surface of the conveying disc 11 is fixedly connected with a support column 13, and one side of the top surface of the conveying disc 11 is fixedly connected with a conveying pipe 14, the support column 13 can provide support for the conveying disc 11, and then the conveying pipe 14 can convey the wiper clip. Since a guide rail 15 is fixedly connected to the center of the bottom surface of the inner cavity of the delivery tube 14, and a drop hole 16 is opened on the bottom surface of the inner cavity of the delivery tube 14 and close to one end of the guide rail 15, the guide rail 15 can guide the correct wiper clip, and then the incorrect wiper clip can fall from the drop hole 16 to the inner cavity of the delivery tray 11, so that it can be transported again. Since support plates 18 are fixedly connected to both sides of the bottom surface of the delivery tray 11, and the top surface of the support plate 18 is connected to the feeding component 2, the support plate 18 can provide the feeding component 2 with a The support can improve the stability of the feeding assembly 2. Since the bottom surface of the delivery pipe 14 and the position near the drop hole 16 are fixedly connected with a guide plate 19, the guide plate 19 can guide the fallen wiper clip, thereby preventing the wiper clip from running around, so as to prevent the fallen wiper clip from causing damage to the equipment. Since one end of the delivery pipe 14 is fixedly connected with a limiting tube 17, the limiting tube 17 can guide the wiper clip, thereby preventing the wiper clip from being misplaced, so that the wiper clip can accurately reach the specified position. A mounting groove 110 is provided at the center of the bottom of the inner cavity of the disk 11, and a rotating table 1111 is fixedly connected to the inner cavity of the mounting groove 110, and a rotating column 1112 is fixedly connected to the top surface of the rotating table 1111, and a rotating plate 1113 is fixedly connected to the side surface of the rotating column 1112, so that the output end of the rotating table 1111 can drive the rotating column 1112 to rotate, and then the rotating column 1112 can drive the rotating plate 1113 to rotate, so that the rotating plate 1113 can drive the wiper clip in the middle of the inner cavity of the conveying disk 11 to the outside of the inner cavity of the conveying disk 11.

[0031] See also Figure 1 , Figure 2 , Figure 6 The feeding assembly 2 includes a gantry 21, which is arranged on the top surface of the support plate 18, a feeding pipe 22 is arranged at the center of the top surface of the gantry 21, a conical pipe 23 is arranged on the bottom surface of the feeding pipe 22, and a material holding pipe 24 is arranged on the top surface of the feeding pipe 22;

[0032] The gantry 21 in the feeding assembly 2 can be fixedly connected to the top surface of the support plate 18 and can provide support for the feeding pipe 22, so that the support plate 18 can provide support for the gantry 21, and then the gantry 21 can provide support for the feeding pipe 22, so that the staff can add the wiper clip into the inner cavity of the feeding pipe 22. Since the bottom surface of the feeding pipe 22 is fixedly connected with the conical tube 23, and the top surface of the feeding pipe 22 is fixedly connected with the material holding tube 24, the conical tube 23 and the material holding tube 24 can guide the wiper clip, so that the wiper clip can enter the inner cavity of the conveying plate 11. Since the bottom surface of the conical tube 23 is fixedly connected with the switch assembly 3, the staff can add the wiper clip into the inner cavity of the conical tube 23, and then the switch assembly 3 can resist the wiper clip in the inner cavity of the conical tube 23, so that the switch assembly 3 can be opened or closed to release or stop the wiper clip.

[0033] See also Figure 1 , Figure 2 , Figure 7 The switch assembly 3 includes a connecting plate 31, which is arranged in the inner cavity of the gantry 21. A discharge hole 32 is provided on the top surface of the connecting plate 31. A moving groove is provided at the center of one side surface of the connecting plate 31. A baffle 33 is provided in the inner cavity of the moving groove. Electric linear slides 34 are provided at the center of both side walls of the moving groove. The output ends of the two electric linear slides 34 are connected to the two side surfaces of the baffle 33. A guide pipe 35 is provided at the lower position of the inner cavity of the discharge hole 32.

[0034] The connecting plate 31 in the switch assembly 3 can be fixedly connected to the inner cavity of the gantry 21, and can also provide space for the discharge hole 32, so that the wiper clip can enter the inner cavity of the conveying plate 11 through the discharge hole 32. A movable groove is provided in the center of one side surface of the connecting plate 31, and a baffle 33 is movably connected to the inner cavity of the movable groove. At the same time, an electric linear slide 34 is embedded in the center of both side walls of the movable groove, and the output end of the electric linear slide 34 is connected to the two side surfaces of the baffle 33, so that the electric linear slide 34 can drive the baffle 33 to move in the inner cavity of the movable groove, and then the baffle can block the bottom end of the conical tube 23, so as to control the amount of wiper added. A guide tube 35 is fixedly connected to the lower position of the inner cavity of the discharge hole 32, so that the guide tube 35 can guide the wiper clip, thereby preventing the wiper clip from jumping around.

[0035] During operation, when it is necessary to transport the wiper clip, first place the feeding component 1 at the preset position, and then fix the feeding component 2 to the top of the feeding component 1, so that the feeding component 1 can provide support for the feeding component 2, and then the staff can add the wiper clip to the inner cavity of the feeding component 2, so that the feeding component 2 can add the wiper clip in the inner cavity to the inner cavity of the feeding component 1, and then control the feeding component 1 through the touch all-in-one machine 4, so that the feeding component 1 can feed the wiper clip in the inner cavity of the feeding component 1. The feeding component 2 vibrates, thereby enabling the feeding component 1 to transport the wiper clip so that the wiper clip can be transported to a preset position. Since the switch component 3 is fixedly connected to the bottom surface of the output end of the feeding component 2, the feeding component 2 can provide support for the switch component 3. The switch component 3 is controlled by the touch all-in-one machine 4, so that the switch component 3 can block and open the output end of the feeding component 2, thereby controlling the amount of wiper clip transported by the output end of the feeding component 2, so as to prevent congestion in the inner cavity of the feeding component 1.

[0036] The conveying disc 11 in the feeding assembly 1 can be placed in a preset position and provide a mounting base for the vibrator 12, so that the conveying disc 11 can provide support for the vibrator 12, and then the vibrator 12 can provide vibration for the conveying disc 11, so that the conveying disc 11 can convey the wiper clip. Since the bottom surface of the conveying disc 11 is fixedly connected with a support column 13, and one side of the top surface of the conveying disc 11 is fixedly connected with a conveying pipe 14, the support column 13 can provide support for the conveying disc 11, and then the conveying pipe 14 can convey the wiper clip. Since a guide rail 15 is fixedly connected to the center of the bottom surface of the inner cavity of the delivery tube 14, and a drop hole 16 is opened on the bottom surface of the inner cavity of the delivery tube 14 and close to one end of the guide rail 15, the guide rail 15 can guide the correct wiper clip, and then the incorrect wiper clip can fall from the drop hole 16 to the inner cavity of the delivery tray 11, so that it can be transported again. Since support plates 18 are fixedly connected to both sides of the bottom surface of the delivery tray 11, and the top surface of the support plate 18 is connected to the feeding component 2, the support plate 18 can provide the feeding component 2 with a The support can improve the stability of the feeding assembly 2. Since the bottom surface of the delivery pipe 14 and the position near the drop hole 16 are fixedly connected with a guide plate 19, the guide plate 19 can guide the fallen wiper clip, thereby preventing the wiper clip from running around, so as to prevent the fallen wiper clip from causing damage to the equipment. Since one end of the delivery pipe 14 is fixedly connected with a limiting tube 17, the limiting tube 17 can guide the wiper clip, thereby preventing the wiper clip from being misplaced, so that the wiper clip can accurately reach the specified position. A mounting groove 110 is provided at the center of the bottom of the inner cavity of the disk 11, and a rotating table 1111 is fixedly connected to the inner cavity of the mounting groove 110, and a rotating column 1112 is fixedly connected to the top surface of the rotating table 1111, and a rotating plate 1113 is fixedly connected to the side surface of the rotating column 1112, so that the output end of the rotating table 1111 can drive the rotating column 1112 to rotate, and then the rotating column 1112 can drive the rotating plate 1113 to rotate, so that the rotating plate 1113 can drive the wiper clip in the middle of the inner cavity of the conveying disk 11 to the outside of the inner cavity of the conveying disk 11.

[0037] The gantry 21 in the feeding assembly 2 can be fixedly connected to the top surface of the support plate 18 and can provide support for the feeding pipe 22, so that the support plate 18 can provide support for the gantry 21, and then the gantry 21 can provide support for the feeding pipe 22, so that the staff can add the wiper clip into the inner cavity of the feeding pipe 22. Since the bottom surface of the feeding pipe 22 is fixedly connected with the conical tube 23, and the top surface of the feeding pipe 22 is fixedly connected with the material holding tube 24, the conical tube 23 and the material holding tube 24 can guide the wiper clip, so that the wiper clip can enter the inner cavity of the conveying plate 11. Since the bottom surface of the conical tube 23 is fixedly connected with the switch assembly 3, the staff can add the wiper clip into the inner cavity of the conical tube 23, and then the switch assembly 3 can resist the wiper clip in the inner cavity of the conical tube 23, so that the switch assembly 3 can be opened or closed to release or stop the wiper clip.

[0038] The connecting plate 31 in the switch assembly 3 can be fixedly connected to the inner cavity of the gantry 21, and can also provide space for the discharge hole 32, so that the wiper clip can enter the inner cavity of the conveying plate 11 through the discharge hole 32. A movable groove is provided in the center of one side surface of the connecting plate 31, and a baffle 33 is movably connected to the inner cavity of the movable groove. At the same time, an electric linear slide 34 is embedded in the center of both side walls of the movable groove, and the output end of the electric linear slide 34 is connected to the two side surfaces of the baffle 33, so that the electric linear slide 34 can drive the baffle 33 to move in the inner cavity of the movable groove, and then the baffle can block the bottom end of the conical tube 23, so as to control the amount of wiper added. A guide tube 35 is fixedly connected to the lower position of the inner cavity of the discharge hole 32, so that the guide tube 35 can guide the wiper clip, thereby preventing the wiper clip from jumping around.

[0039] In summary, the device can not only transport the wiper clips, but also facilitate the addition of the wiper clips and control the amount of the wiper clips added, thereby preventing congestion caused by excessive addition of wiper clips, and thus ensuring the stable operation of the equipment.

[0040] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A feeding device for assembling wiper clips, characterized in that: include: A feeding assembly (1), the feeding assembly (1) being used for conveying the wiper clips; A feeding component (2), the feeding component (2) being arranged directly above the feeding component (1), and the feeding component (2) being used for feeding the inner cavity of the feeding component (1); A switch component (3), the switch component (3) being arranged on the bottom surface of the output end of the feeding component (2), the switch component (3) being used to control a clamp for feeding into the inner cavity of the feeding component (2); as well as A touch all-in-one machine (4), wherein the touch all-in-one machine (4) is arranged on a surface of one side of the feeding component (2).

2. A feeding device for wiper clip assembly according to claim 1, characterized in that: The feeding assembly (1) comprises a conveying tray (11), a vibrator (12) is arranged at a central position on the bottom surface of the conveying tray (11), a support column (13) is arranged on the bottom surface of the conveying tray (11), a conveying pipe (14) is arranged on one side of the top surface of the conveying tray (11), a guide rail (15) is arranged at a central position on the bottom surface of the inner cavity of the conveying pipe (14), and a drop hole (16) is provided on the bottom surface of the inner cavity of the conveying pipe (14) and close to one end of the guide rail (15); a limit tube (17) is arranged at one end of the conveying pipe (14), and support plates (18) are arranged on both sides of the bottom surface of the conveying tray (11), and the top surface of the support plate (18) is connected to the feeding assembly (2).

3. A feeding device for wiper clip assembly according to claim 2, characterized in that: A guide plate (19) is provided on the bottom surface of the conveying pipe (14) and close to the drop hole (16), and the guide plate (19) is used to guide the dropped clip.

4. A feeding device for assembling wiper clips according to claim 2, characterized in that: A mounting groove (110) is provided at the center of the bottom of the inner cavity of the conveying plate (11), and a rotating portion (111) is provided in the inner cavity of the mounting groove (110).

5. A feeding device for wiper clip assembly according to claim 4, characterized in that: The rotating part (111) comprises a rotating platform (1111), a rotating column (1112) is arranged on the top surface of the rotating platform (1111), and a rotating plate (1113) is arranged on one side surface of the rotating column (1112).

6. A feeding device for wiper clip assembly according to claim 2, characterized in that: The feeding assembly (2) comprises a gantry (21), the gantry (21) being arranged on the top surface of the support plate (18), a feed pipe (22) being arranged at the center of the top surface of the gantry (21), a conical pipe (23) being arranged on the bottom surface of the feed pipe (22), and a material containing pipe (24) being arranged on the top surface of the feed pipe (22).

7. A feeding device for assembling wiper clips according to claim 6, characterized in that: The switch assembly (3) comprises a connecting plate (31), the connecting plate (31) being arranged in the inner cavity of the gantry (21), a discharge hole (32) being provided on the top surface of the connecting plate (31), a movable groove being provided at a central position on a side surface of the connecting plate (31), a baffle (33) being provided in the inner cavity of the movable groove, electric linear slides (34) being provided at central positions on both side walls of the movable groove, two output ends of the two electric linear slides (34) being connected to the two side surfaces of the baffle (33), and a guide tube (35) being provided at a lower position in the inner cavity of the discharge hole (32).