Photovoltaic cell clamping device

Abstract

The utility model belongs to the technical field of photovoltaic cell processing equipment, and particularly relates to a photovoltaic cell clamping device which comprises a base. A motor is arranged at the bottom of the base; the output end of the motor is fixedly connected with a first gear; the top of the first gear is fixedly connected with a turntable seat; the top of the turntable seat is fixedly connected with a fixed plate; the pair of fixing plates is symmetrically arranged at the top of the turntable seat; a telescopic rod is fixedly connected to the middle of the side wall of the fixing plate. The other end part of the telescopic rod is fixedly connected with a clamping plate; a spring is arranged on the outer wall of the telescopic rod; the two ends of the spring are fixedly connected with the fixing plate and the clamping plate respectively; according to the step, the distance between the pair of clamping plates can be adjusted according to different sizes of the photovoltaic cells, so that the pair of clamping plates can tightly clamp the photovoltaic cells, and the situation that when the photovoltaic cells are cut, due to the fact that clamping is not stable, the photovoltaic cells suffer from too large stress, and the photovoltaic cells are damaged is reduced. Therefore, the battery piece is damaged or cracked.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic cell processing equipment, in particular to a photovoltaic cell sheet clamping device. Background Art

[0002] Photovoltaic cells are the core components of photovoltaic power generation systems. They are made of single / multi-crystalline silicon wafers and are semiconductor sheets that can convert sunlight energy into electrical energy. In the prior art, the clamping of photovoltaic cells plays an important role in multiple production processes of photovoltaic cells, mainly in the processes of cutting silicon wafers, cleaning silicon wafers, forming PN junctions, electrode production, and photovoltaic module production.

[0003] During long-term use and observation, it was found that during the cutting process of photovoltaic cells, unstable clamping will cause cracks in some photovoltaic cells, which will reduce the quality of the photovoltaic cells and increase production costs. At the same time, the debris generated during cutting will adhere to the blade or cutting tool, thereby increasing the cutting resistance and reducing the cutting efficiency.

[0004] To this end, the utility model provides a photovoltaic cell sheet clamping device. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve at least one problem raised in the background technology, a photovoltaic cell clamping device is proposed.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a photovoltaic cell clamping device described in the utility model comprises a base; a motor is provided at the bottom of the base; a first gear is fixedly connected to the output end of the motor; a turntable seat is fixedly connected to the top of the first gear; a fixing plate is fixedly connected to the top of the turntable seat; the fixing plates are a pair and are symmetrically arranged on the top of the turntable seat; a telescopic rod is fixedly connected to the middle of the side wall of the fixing plate; a clamping plate is fixedly connected to the other end of the telescopic rod; a spring is provided on the outer wall of the telescopic rod; the two ends of the spring are respectively fixed to the fixing plate and the clamping plate; a suction cup is fixedly connected to the middle of the side wall of the clamping plate; the suction cups are multiple and evenly arranged on the outer wall of the clamping plate; this step can adjust the distance between a pair of clamping plates according to the different sizes of photovoltaic cells by arranging the fixing plate, the telescopic rod, the spring and the clamping plate , so that a pair of clamping plates can tightly clamp the photovoltaic cell piece, reducing the situation that the photovoltaic cell piece is subjected to excessive stress due to unstable clamping when the photovoltaic cell piece is cut, thereby causing the cell piece to be damaged or cracked. By setting the suction cup, the suction cup can tightly adsorb the surface of the photovoltaic cell piece while the clamping plate clamps the photovoltaic cell piece, thereby increasing the clamping stability of the clamping plate on the photovoltaic cell piece, reducing the situation that cracks are generated on the surface of the photovoltaic cell piece during the cutting process due to unstable clamping, resulting in a decrease in the production quality of the photovoltaic cell piece and an increase in the production cost. By setting the motor, the first gear and the fixed plate, the orientation of the clamped photovoltaic cell piece can be changed, and the photovoltaic cell piece can be processed at multiple angles according to the operation requirements, thereby increasing the operation flexibility and improving the processing efficiency of the photovoltaic cell piece.

[0007] Preferably, the outer wall of the base is provided with a bottom plate; the top of the bottom plate is rotatably connected to a second gear; there are multiple second gears and they are evenly arranged on the top of the bottom plate; multiple second gears are meshed with the first gear; a jet pipe is fixedly connected to the middle of the second gear; the jet pipe runs through the middle of the second gear; a heat sink is fixedly connected to the bottom of the jet pipe; a support rod is fixedly connected to the middle of the inner wall of the heat sink; the other end of the support rod is rotatably connected to a bearing fan; a jet port is provided on the side wall of the jet pipe facing the clamping plate; the jet ports are multiple and evenly distributed on the side wall of the jet pipe; this step arranges the jet pipe, the heat sink, the support rod, the bearing fan and the jet port, so that the airflow generated by the rotation of the bearing fan blades can be discharged to the outside of the jet pipe through the jet port Since the opening direction of the air jet is set to the side wall facing the clamping plate, the airflow ejected from the air jet will be sprayed to the surface of the photovoltaic cell, which can blow away the debris and other impurities on the surface of the photovoltaic cell after the cutting process, reduce the debris generated during cutting adhering to the blade or cutting tool, thereby increasing the cutting resistance and reducing the cutting efficiency. By setting a second gear, because the second gear is meshing with the first gear, the first gear will drive the second gear to rotate while rotating, and the rotation of the second gear changes the position of the airflow sprayed from the air jet to the surface of the photovoltaic cell, which can make the airflow fully contact with the surface of the photovoltaic cell, so that the debris remaining on the surface of the photovoltaic cell can be completely blown off.

[0008] Preferably, a dust shield is fixedly connected to the top of the base plate; the dust shield is a pair and symmetrically arranged on the top of the base plate; the top of the dust shield is inclined and bent downward; in this step, the dust shield can be arranged to block the debris blown away by the airflow ejected from the air jet inside the pair of dust shields, so that the debris will not fly everywhere, reducing the pollution of the debris to the surrounding environment, reducing the impact of the debris inhaled during the operation on the health of the staff, and reducing the situation where the debris flying around may increase the workload of cleaning and maintenance, thereby reducing the work efficiency.

[0009] Preferably, a slot is provided in the middle of the first gear; there are multiple slots evenly distributed in the middle of the first gear; a roller is provided in the middle of the slot; the roller rotates on the top of the base; in this step, the slot and the roller are set so that when the first gear rotates on the top of the base, the roller also rolls on the top of the base as the first gear rotates, and the rolling of the roller inside the first gear can increase the power of the first gear when it rotates on the top of the base, reduce the friction loss of the first gear when it rotates on the top of the base, and reduce the situation where the rotation state decreases due to mechanical fatigue of the first gear.

[0010] Preferably, a first screen is fixedly connected to the middle of the air jet; a second screen is fixedly connected to the middle of the heat sink; this step can block impurities in the air outside the air jet pipe by arranging the first screen and the second screen, thereby reducing the increased resistance encountered by the bearing fan during rotation due to impurities adhering to the blades of the bearing fan, thereby reducing the rotation speed and efficiency of the bearing fan.

[0011] Preferably, a sponge pad is fixedly connected to the middle of the suction cup; the sponge pad is made of elastic material; this step can reduce the loss such as cracks on the surface of the photovoltaic cell due to friction between the suction cup and the photovoltaic cell by providing the sponge pad, and reduce the situation in which the production quality and service life of the photovoltaic cell are reduced due to cracks on the surface of the photovoltaic cell.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. The photovoltaic cell clamping device described in the utility model can adjust the distance between a pair of clamping plates according to the different sizes of photovoltaic cells by setting a fixed plate, a telescopic rod, a spring and a clamping plate, so that the pair of clamping plates can clamp the photovoltaic cell tightly, reducing the situation that the photovoltaic cell is subjected to excessive stress due to unstable clamping during the cutting process of the photovoltaic cell, thereby causing damage or cracks to the cell; by setting a suction cup, the suction cup can tightly adsorb the surface of the photovoltaic cell while the clamping plate clamps the photovoltaic cell, thereby increasing the clamping stability of the clamping plate on the photovoltaic cell, reducing the situation that cracks on the surface of the photovoltaic cell during the cutting process due to unstable clamping, resulting in a decrease in the production quality of the photovoltaic cell and an increase in the production cost; by setting a motor, a first gear and a fixed plate, the orientation of the clamped photovoltaic cell can be changed, and the photovoltaic cell can be processed at multiple angles according to the operation requirements, thereby increasing the operation flexibility and improving the processing efficiency of the photovoltaic cell.

[0014] 2. The photovoltaic cell clamping device described in the utility model can block the debris blown away by the airflow ejected from the air jet inside a pair of dust shields by setting dust shields, so that the debris will not fly everywhere, reducing the pollution of the debris to the surrounding environment, reducing the impact on the health of workers when inhaling debris during operation, and reducing the situation where the debris flying around may increase the workload of cleaning and maintenance, thereby reducing work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a stereogram in the utility model;

[0017] Figure 2 It is a cross-sectional view in the utility model;

[0018] Figure 3 It is a schematic diagram of the matching structure of the clamping plate and the bearing fan in the utility model;

[0019] Figure 4 It is a schematic diagram of the matching structure of the bearing fan and the jet pipe in the utility model;

[0020] Legend:

[0021] 1. Base; 11. Motor; 12. First gear; 13. Fixed plate; 14. Telescopic rod; 15. Spring; 16. Clamping plate; 17. Suction cup; 18. Turntable seat; 2. Bottom plate; 21. Second gear; 22. Jet pipe; 23. Heat sink; 24. Support rod; 25. Bearing fan; 26. Jet port; 3. Dust shield; 4. Notch; 41. Roller; 5. First screen; 51. Second screen; 6. Sponge pad. DETAILED DESCRIPTION

[0022] 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 of 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.

[0023] Specific examples are given below.

[0024] like Figures 1 to 3As shown, a photovoltaic cell clamping device described in an embodiment of the utility model comprises a base 1; a motor 11 is provided at the bottom of the base 1; a first gear 12 is fixedly connected to the output end of the motor 11; a turntable seat 18 is fixedly connected to the top of the first gear 12; a fixing plate 13 is fixedly connected to the top of the turntable seat 18; the fixing plates 13 are a pair and are symmetrically arranged on the top of the turntable seat 18; a telescopic rod 14 is fixedly connected to the middle of the side wall of the fixing plate 13; a clamping plate 16 is fixedly connected to the other end of the telescopic rod 14; a spring 15 is provided on the outer wall of the telescopic rod 14; the two ends of the spring 15 are respectively fixedly connected to the fixing plate 13 and the clamping plate 16; the clamping plate 1 A suction cup 17 is fixedly connected to the middle of the side wall 6; the suction cup 17 is multiple and evenly arranged on the outer wall of the clamping plate 16; when working, the staff places the photovoltaic cell in the middle of a pair of clamping plates 16, and adjusts the stretching length of the multiple telescopic rods 14 fixedly connected to the middle of the fixed plate 13, so that the clamping plate 16 at the end of the telescopic rod 14 can just clamp the photovoltaic cell. At this time, the multiple suction cups 17 fixedly connected to the outer wall of the clamping plate 16 can tightly adsorb the surface of the photovoltaic cell while the clamping plate 16 clamps the photovoltaic cell. After the staff clamps the photovoltaic cell, they turn on the motor 11, and the motor 11 drives the first gear 12 fixedly connected to the output end to rotate. The rotation of the first gear 12 also drives the top fixed plate 13, telescopic rod 14, spring 15, clamping plate 16, suction cup 17 and turntable seat 18 to rotate, so that the photovoltaic cell clamped between the pair of clamping plates 16 can change direction by rotation. In this step, the distance between the pair of clamping plates 16 can be adjusted according to the different sizes of photovoltaic cells by setting the fixed plate 13, telescopic rod 14, spring 15 and clamping plate 16, so that the pair of clamping plates 16 can clamp the photovoltaic cell tightly, reducing the photovoltaic cell being subjected to excessive stress due to unstable clamping when cutting the photovoltaic cell, thereby causing the cell to be damaged. In the case of cracks, the suction cup 17 can be arranged so that the suction cup 17 can tightly adhere to the surface of the photovoltaic cell while the clamping plate 16 clamps the photovoltaic cell, thereby increasing the clamping stability of the clamping plate 16 on the photovoltaic cell and reducing the cracks on the surface of the photovoltaic cell during cutting due to unstable clamping, which leads to reduced production quality and increased production costs of the photovoltaic cell. The motor 11, the first gear 12 and the fixed plate 13 can be arranged to change the orientation of the clamped photovoltaic cell, and the photovoltaic cell can be processed at multiple angles according to the operation requirements, thereby increasing the operation flexibility and improving the processing efficiency of the photovoltaic cell.

[0025] Further, such as Figures 1 to 4As shown, the outer wall of the base 1 is provided with a bottom plate 2; the top of the bottom plate 2 is rotatably connected to a second gear 21; there are multiple second gears 21 and they are evenly arranged on the top of the bottom plate 2; the multiple second gears 21 are all meshed with the first gear 12; the middle of the second gear 21 is fixedly connected to an air jet pipe 22; the air jet pipe 22 runs through the middle of the second gear 21; the bottom of the air jet pipe 22 is fixedly connected to a heat sink 23; the middle of the inner wall of the heat sink 23 is fixedly connected to a support rod 24; the other end of the support rod 24 is rotatably connected to a bearing fan 25; the side wall of the air jet pipe 22 facing the clamping plate 16 is provided with an air jet port 26; The jet ports 26 are multiple and evenly distributed on the side wall of the jet pipe 22; when working, the bearing fan 25 inside the jet pipe 22 rotates. At this time, under the fanning of the bearing fan 25 blades, airflow is generated inside the jet pipe 22, and the airflow flows outward along the jet ports 26. Since the opening direction of the jet ports 26 is set to the side wall facing the clamping plate 16, the airflow ejected from the jet ports 26 will blow toward the photovoltaic cell clamped by the pair of clamping plates 16. At this time, the staff turns on the motor 11, and the motor 11 drives the first gear 12 fixed to the output end to rotate. The rotation of the first gear 12 drives multiple first gears 12 meshing with the first gear 12. The second gear 21 rotates, and the second gear 21 also drives the air jet pipe 22, the heat sink 23, the support rod 24, the bearing fan 25 and the air jet port 26 to rotate, so that the air jet port 26 can continuously change its orientation when ejecting airflow to the photovoltaic cell. In this step, the air jet pipe 22, the heat sink 23, the support rod 24, the bearing fan 25 and the air jet port 26 are arranged, and the airflow generated by the rotation of the blades of the bearing fan 25 can be ejected to the outside of the air jet pipe 22 through the air jet port 26. Since the opening direction of the air jet port 26 is set to the side wall facing the clamping plate 16, the airflow ejected from the air jet port 26 will be sprayed to the surface of the photovoltaic cell, which can The debris and other impurities on the surface of the photovoltaic cell after the cutting process are blown away from the surface of the photovoltaic cell to reduce the debris generated during cutting adhering to the blade or cutting tool, thereby increasing the cutting resistance and reducing the cutting efficiency. By setting the second gear 21, because the second gear 21 is meshing with the first gear 12, the first gear 12 will drive the second gear 21 to rotate while rotating. The rotation of the second gear 21 changes the position of the airflow sprayed from the air jet 26 to the surface of the photovoltaic cell, so that the airflow can fully contact the surface of the photovoltaic cell, so that the debris remaining on the surface of the photovoltaic cell can be completely blown off.

[0026] Further, such as Figure 1 and Figure 2As shown, a dust shield 3 is fixedly connected to the top of the base plate 2; the dust shield 3 is a pair and symmetrically arranged on the top of the base plate 2; the top of the dust shield 3 is inclined and bent downward; when working, under the fanning of the bearing fan 25 blades, the airflow generated inside the jet pipe 22 will flow outward along the jet port 26, and the airflow ejected from the jet port 26 will blow toward the photovoltaic cell clamped by a pair of clamping plates 16. At this time, the airflow will blow the debris on the photovoltaic cell to the surroundings, and part of the debris will contact the dust shield 3 and be blocked by the dust shield 3. In this step, the dust shield 3 can be set to block the debris blown away by the airflow ejected from the jet port 26 inside the pair of dust shields 3, so that the debris will not float everywhere, reduce the pollution of the surrounding environment by the debris, reduce the impact of the staff's inhalation of debris on their health during work, and reduce the situation where the debris floating around may increase the workload of cleaning and maintenance, thereby reducing work efficiency.

[0027] Further, such as Figure 1 and Figure 3 As shown, a slot 4 is provided in the middle of the first gear 12; there are multiple slots 4 and they are evenly distributed in the middle of the first gear 12; a roller 41 is provided in the middle of the slot 4; the roller 41 rotates on the top of the base 1; during operation, the staff turns on the motor 11, and the motor 11 drives the first gear 12 fixed to the output end to rotate. At this time, the multiple rollers 41 rotating on the top of the base 1 begin to roll inside the first gear 12 as the first gear 12 rotates. In this step, by setting the slot 4 and the roller 41, when the first gear 12 rotates on the top of the base 1, the roller 41 also rolls on the top of the base 1 as the first gear 12 rotates. The rolling of the roller 41 inside the first gear 12 can increase the power of the first gear 12 when it rotates on the top of the base 1, reduce the friction loss of the first gear 12 when it rotates on the top of the base 1, and reduce the situation where the rotation state decreases due to mechanical fatigue of the first gear 12.

[0028] Further, such as Figures 1 to 4 As shown, a first screen 5 is fixedly connected to the middle of the jet port 26; a second screen 51 is fixedly connected to the middle of the heat sink 23; when working, the airflow ejected from the jet port 26 will blow toward the photovoltaic cell clamped by a pair of clamping plates 16, and at this time, the first screen 5 and the second screen 51 will block impurities such as debris on the surface of the photovoltaic cell outside the jet pipe 22. In this step, by setting the first screen 5 and the second screen 51, impurities in the air can be blocked outside the jet pipe 22, reducing the increase in resistance of the bearing fan 25 during rotation due to impurities adhering to the blades of the bearing fan 25, thereby reducing the rotation speed and efficiency of the bearing fan 25.

[0029] Further, such as Figures 1 to 3As shown, a sponge pad 6 is fixedly connected to the middle of the suction cup 17; the sponge pad 6 is made of elastic material; this step can reduce the friction between the suction cup 17 and the photovoltaic cell, which may cause cracks on the surface of the photovoltaic cell, and reduce the situation in which the production quality and service life of the photovoltaic cell are reduced due to cracks on the surface of the photovoltaic cell.

[0030] Working principle: The staff places the photovoltaic cell in the middle of a pair of clamping plates 16, adjusts the stretching length of the multiple telescopic rods 14 fixed to the middle of the fixed plate 13, so that the clamping plate 16 at the end of the telescopic rod 14 can just clamp the photovoltaic cell. At this time, the multiple suction cups 17 fixed to the outer wall of the clamping plate 16 can tightly adsorb the surface of the photovoltaic cell while the clamping plate 16 clamps the photovoltaic cell. After the staff clamps the photovoltaic cell, they turn on the motor 11, and the motor 11 drives the first gear 12 fixed to the output end to rotate. The rotation of the first gear 12 also drives the top fixed The plate 13, telescopic rod 14, spring 15, clamping plate 16, suction cup 17 and turntable seat 18 rotate, so that the photovoltaic cell clamped between the pair of clamping plates 16 can change direction by rotating, and the bearing fan 25 inside the jet pipe 22 rotates. At this time, under the fanning of the bearing fan 25 blades, airflow is generated inside the jet pipe 22, and the airflow flows outward along the jet port 26. Since the opening direction of the jet port 26 is set to the side wall facing the clamping plate 16, the airflow ejected from the jet port 26 will blow toward the photovoltaic cell clamped by the pair of clamping plates 16. At this time, the staff turns on the electric The motor 11 drives the first gear 12 fixed to the output end to rotate, and the rotation of the first gear 12 drives the plurality of second gears 21 meshed with the first gear 12 to rotate. The rotation of the second gear 21 also drives the air jet pipe 22, the heat sink 23, the support rod 24, the bearing fan 25 and the air jet port 26 to rotate, so that the air jet port 26 can continuously change its orientation when ejecting airflow to the photovoltaic cell sheet. Under the fanning of the blades of the bearing fan 25, the airflow generated inside the air jet pipe 22 will flow outward along the air jet port 26, and the airflow ejected from the air jet port 26 will blow toward the photovoltaic cell sheet clamped by a pair of clamping plates 16. The airflow from the air jet port 26 will blow the debris on the photovoltaic cell sheet to the surroundings, and some of the debris will contact the dust shield 3 and be blocked by the dust shield 3. The staff turns on the motor 11, and the motor 11 drives the first gear 12 fixed to the output end to rotate. At this time, the multiple rollers 41 rotating on the top of the base 1 begin to roll inside the first gear 12 as the first gear 12 rotates. The airflow ejected from the air jet port 26 will blow toward the photovoltaic cell sheet clamped by a pair of clamping plates 16. At this time, the first screen 5 and the second screen 51 will block the debris and other impurities on the surface of the photovoltaic cell sheet outside the air jet pipe 22.

[0031] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A photovoltaic cell clamping device, comprising a base (1); characterized in that: The base (1) is provided with a motor (11) at the bottom; the output end of the motor (11) is fixedly connected to a first gear (12); the top of the first gear (12) is fixedly connected to a turntable seat (18); the top of the turntable seat (18) is fixedly connected to a fixing plate (13); the fixing plates (13) are a pair and are symmetrically arranged on the top of the turntable seat (18); a telescopic rod (14) is fixedly connected to the middle of the side wall of the fixing plate (13); the other end of the telescopic rod (14) is fixedly connected to a clamping plate (16); a spring (15) is provided on the outer wall of the telescopic rod (14); the two ends of the spring (15) are respectively fixedly connected to the fixing plate (13) and the clamping plate (16); a suction cup (17) is fixedly connected to the middle of the side wall of the clamping plate (16); a plurality of suction cups (17) are evenly arranged on the outer wall of the clamping plate (16).

2. A photovoltaic cell clamping device according to claim 1, characterized in that: The outer wall of the base (1) is provided with a bottom plate (2); the top of the bottom plate (2) is rotatably connected to a second gear (21); there are a plurality of second gears (21) which are evenly arranged on the top of the bottom plate (2); the plurality of second gears (21) are all meshed with the first gear (12); a jet pipe (22) is fixedly connected to the middle of the second gear (21); the jet pipe (22) passes through the middle of the second gear (21); a heat sink (23) is fixedly connected to the bottom of the jet pipe (22); a support rod (24) is fixedly connected to the middle of the inner wall of the heat sink (23); the other end of the support rod (24) is rotatably connected to a bearing fan (25); a jet port (26) is provided on the side wall of the jet pipe (22) facing the clamping plate (16); there are a plurality of jet ports (26) which are evenly distributed on the side wall of the jet pipe (22).

3. A photovoltaic cell clamping device according to claim 2, characterized in that: A dust shield (3) is fixedly connected to the top of the bottom plate (2); the dust shield (3) is a pair and is symmetrically arranged on the top of the bottom plate (2); the top of the dust shield (3) is arranged to be inclined and bent downward.

4. A photovoltaic cell clamping device according to claim 3, characterized in that: A notch (4) is provided in the middle of the first gear (12); the notches (4) are multiple and evenly distributed in the middle of the first gear (12); a roller (41) is provided in the middle of the notch (4); and the roller (41) rotates on the top of the base (1).

5. A photovoltaic cell clamping device according to claim 4, characterized in that: A first screen (5) is fixedly connected to the middle of the air jet port (26); and a second screen (51) is fixedly connected to the middle of the heat dissipation plate (23).

6. A photovoltaic cell clamping device according to claim 5, characterized in that: A sponge pad (6) is fixedly connected to the middle of the suction cup (17); the sponge pad (6) is made of elastic material.

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