A glass cleaner

Abstract

A squeegee comprises a rod and a squeegee head, the squeegee head comprising a rubber strip, a rubber strip sheath and a base, the rubber strip being fixed in the rubber strip sheath, the base being coupled to the end of the rod, wherein the rubber strip sheath is movable in the groove of the base, the base further has an elastic locking device, the elastic locking device being in contact with the rubber strip sheath and applying the elastic force generated by the elastic deformation to the rubber strip sheath, the rubber strip sheath being locked, the friction force between the rubber strip sheath and the contacted object overcoming the elastic force of the elastic locking device, the rubber strip sheath being movable in the groove.

Description

Technical Field

[0001] The product involved in this utility model belongs to a cleaning product, and in particular a glass cleaner with movable rubber strips and asymmetrical distribution of the rubber strips and the rod. Background Technology

[0002] Window cleaners are already a mature product, offering both wiping and scraping functions. This invention focuses on the scraping function. Currently, window cleaners with scraping capabilities include a rod and a scraper head. The scraper head comprises a rubber strip, a rubber strip sleeve, and a base. The rubber strip is a thin, elongated rubber material, approximately 30 cm in length. The rubber strip sleeve is cut from an aluminum profile and is about 1 cm shorter than the rubber strip. The rubber strip sleeve keeps the rubber strip in a straight working position. There is a cooperating structure between the rubber strip and the rubber strip sleeve to prevent the rubber strip from detaching from the radial opening of the rubber strip sleeve. The front part of the rubber strip scrapes away dirt from the glass surface, while the rear part is fixed inside the rubber strip sleeve. The rubber strip sheath is fixed in a groove in the base, which is made of plastic. There are various ways to fix the groove and the rubber strip sheath. For example, the groove and the rubber strip sheath may have the same cross-sectional shape, but the groove may be slightly smaller. The base can be boiled in hot water, and the rubber strip sheath and rubber strip can be inserted when the base is heated. Alternatively, the rubber strip sheath and rubber strip can be mechanically pressed in, securing them within the groove. Another method is to use a groove sized to facilitate insertion, with the rubber strip sheath partially deforming within the groove to increase its size, thus securing it to the base. In some products, the rubber strip sheath can move within the groove under pressure, but this requires considerable force, which is not the normal operating condition for the product. Other fixing methods include adhesive bonding and screw fixing. The base is connected to the end of the rod, which can be a straight rod, an arc rod, or a U-shaped rod. The rubber strips are symmetrically distributed with respect to the symmetrical surfaces of the rod, and the rubber strip sleeve and the base are not movable relative to each other.

[0003] Existing window cleaners are very effective at cleaning the exterior windows of high-rise buildings. When the handle is horizontal and the rubber strip is perpendicular to the handle, it is easy to apply force and clean the glass surface. However, when cleaning the corners of windows at high or low locations, the handle needs to be tilted at a certain angle to the ground, and the rubber strip needs to be perpendicular or horizontal to the ground. In this case, it is inconvenient to apply force, making it difficult to clean the glass surface thoroughly.

[0004] Assuming a window cleaner is 170cm tall, the handhold height of the cleaning rod at a high position would be 210cm. The average room height is 275cm. Subtracting the building structure and window frames, the height of the exterior window glass is approximately 260cm. 260cm - 210cm = 50cm. At the top of the product, the dimension of the rubber strip's symmetrical plane with the rod is 50cm. This allows the person to scrape the higher parts of the exterior window glass when the rod is horizontal and the rubber strip is vertical. Similarly, for a 170cm tall person standing upright, the handhold height of the cleaning rod at a low position is approximately 75cm. The lower part of the exterior window glass is approximately 15cm. 75cm - 15cm = 60cm. If the person then squats down about 10cm, the dimension of the rubber strip's symmetrical plane with the rod at the bottom of the product is also 50cm. This allows the person to scrape the lower parts of the exterior window glass when the rod is horizontal and the rubber strip is vertical. For existing window cleaner products, the rubber strip needs to be 50cm on both sides of the rod, meaning the strip length would need to be 100cm, which is too long.

[0005] The core idea of ​​this invention is that the adhesive strip sleeve can move easily within the groove of the base. The base has an elastic locking device that applies the elastic force generated by its deformation to the adhesive strip sleeve, locking it in place. The magnitude of this elastic force is pre-designed to overcome the friction between the adhesive strip sleeve and the contacting object when movement is needed, allowing the sleeve to move within the groove. Assuming the base width is 9 cm, 50 + 9 / 2 = 54.5 cm, and the adhesive strip approximately 55 cm long, would meet the requirement of 50 cm on each side. With the rod horizontal and the adhesive strip perpendicular to the rod, theoretically, it can reach all corners of the exterior windows of high-rise buildings. The adhesive strip sleeve can move within the groove of the base and is locked at its movable position, thus improving the adaptability of the window cleaner. In practice, there are various sizes of glass, and the rubber strip, which is about 55 centimeters long or longer, may be wider than the size of the glass. In this case, two sizes of scraper heads can be provided, such as rubber strips that are 35 centimeters long and 65 centimeters long, which further improves the adaptability of the glass cleaner product.

[0006] No similar content to this utility model has been found in the existing technology of current glass cleaner products, and no such glass cleaner products have been seen on the market. Utility Model Content

[0007] The technical problem this invention aims to solve is to provide a window cleaner product in which the rubber strip sleeve can move within a groove in the base when cleaning exterior glass, and is locked in the movable position. This allows the product to easily clean a larger area of ​​the exterior glass surface when the rod is horizontal and the rubber strip is vertical.

[0008] To solve the above-mentioned technical problems, the contents of this utility model are as follows:

[0009] A glass cleaner includes a rod and a scraper head. The scraper head includes a rubber strip, a rubber strip sheath, and a base. The rubber strip is fixed inside the rubber strip sheath, which is located within a groove in the base. The base is connected to the end of the rod. The groove has a structure to prevent the rubber strip sheath from detaching from its cross-sectional opening, allowing the rubber strip sheath to move within the groove. The base also has an elastic locking device with a mechanism for elastic deformation. The elastic locking device contacts the rubber strip sheath, and the mechanism springs the rubber strip sheath back into place. The elastic force generated by the deformation acts on the rubber strip sheath; the base may have a pressure-bearing surface, which is a surface opposite to the elastic locking device, separated from the rubber strip sheath. If the base has the pressure-bearing surface, the rubber strip sheath at least presses against the pressure-bearing surface, and the rubber strip sheath is locked. If there is no pressure-bearing surface, the rubber strip sheath only presses against the groove, and the rubber strip sheath is also locked. When it is necessary to move the rubber strip sheath, the friction between the rubber strip sheath and the object it contacts, generated by the elastic force, is overcome, and the rubber strip sheath can move in the groove.

[0010] As a preferred embodiment, with the cross-section of the groove as the projection plane, the outline of the projection of the pressure-bearing surface coincides with a portion of the outline of the groove. In this case, the rubber strip sheath presses the pressure-bearing surface and the groove together.

[0011] The following points need further explanation regarding the above: The fit between the rubber strip sleeve and the groove must consider not only the movement of the rubber strip sleeve but also the slight rotation and movement of the rubber strip sleeve relative to the groove during glass scraping operations. Therefore, the rubber strip sleeve and the groove have a very small gap. The pressure-bearing surface has only a single-sided gap with the rubber strip sleeve, while the groove and the rubber strip sleeve have double-sided gaps. If the gap between the pressure-bearing surface and the rubber strip sleeve is less than half the total gap between the groove and the rubber strip sleeve, the rubber strip sleeve may not move smoothly when moving through the groove and across the pressure-bearing surface. If the gap between the pressure-bearing surface and the rubber strip sleeve is equal to half the total gap between the groove and the rubber strip sleeve, the rubber strip sleeve will move smoothly when moving through the groove and across the pressure-bearing surface.

[0012] As a further preferred embodiment, the base has a hole or groove intersecting the recess, and the elastic locking device only contacts the rubber strip sleeve within the hole or groove; when the hole or groove is a blind hole or blind groove, the pressure-bearing surface can be the bottom surface of the blind hole or blind groove, and the bottom surface can be connected to the surface of the recess without gap; when the hole or groove is a through hole or through groove, there is no pressure-bearing surface within the through hole or through groove, and the rubber strip sleeve only presses against the recess.

[0013] As a further preferred embodiment, the groove has a cross-section that is smaller at the opening and larger at the inside, preventing the adhesive strip from falling off from the opening of the groove's cross-section, and allowing the adhesive strip to move within the groove. On the base, the groove is on one side, and the other side has a surface supporting the adhesive strip; this surface is the pressure-bearing surface. A pressure plate is fixed to the base with at least two rivets. The pressure plate is made of elastic steel sheet. When the adhesive strip is not installed, the end of the pressure plate intrudes into the space of the groove. After the adhesive strip is installed, the pressure plate... The end is subjected to an elastic force, which is applied to the rubber strip sleeve, causing the rubber strip sleeve to press against the pressure surface. The pressure surface is projected onto the cross-section of the groove, and the projection of the contour line of the pressure surface coincides with a portion of the contour line of the groove. Therefore, the rubber strip sleeve also presses against the groove, and the rubber strip sleeve is locked. When it is necessary to move the rubber strip sleeve, the frictional force between the rubber strip sleeve and the pressure plate, the groove, and the pressure surface generated by the elastic force of the pressure plate is overcome, and the rubber strip sleeve can move in the groove.

[0014] As a further preferred embodiment, the base has a hole or groove in the middle, which communicates with the recess. The recess has recesses on both sides of the hole or groove. The solid portion in the middle of the hole or groove is a cantilever beam. In its natural state, a portion of the cantilever beam intrudes into the space of the recess. By forcefully prying away the portion of the cantilever beam that has intruded into the recess, the rubber strip sheath can be inserted into the recess. After insertion, the cantilever beam undergoes elastic deformation, generating a spring force that presses the rubber strip sheath tightly against the pressure-bearing surface and the recess, or the recess itself, thus locking the rubber strip sheath in place. When it is necessary to move the rubber strip sheath, the frictional force between the rubber strip sheath and the cantilever beam, the recess, and the pressure-bearing surface, or the frictional force between the rubber strip sheath and the cantilever beam and the recess, generated by the elastic force of the cantilever beam, allows the rubber strip sheath to move within the recess.

[0015] As a further preferred embodiment, the base has at least one hole communicating with the groove, and the groove is located on both sides of the hole. Correspondingly, at least one locking block passes through the hole and contacts the rubber strip sleeve. Behind the locking block, a compressed spring is installed. The elastic force generated by the spring presses the rubber strip sleeve against the locking block, causing the rubber strip sleeve to press against the pressure surface and the groove, or the groove, thus locking the rubber strip sleeve. When it is necessary to move the rubber strip sleeve, the frictional force between the rubber strip sleeve and the locking block, the groove, and the pressure surface generated by the elastic force of the locking block, or the frictional force between the rubber strip sleeve and the locking block and the groove, can be overcome, allowing the rubber strip sleeve to move within the groove.

[0016] As a further preferred embodiment, a square hole is located in the center of the base, exposing a section of the rubber strip sheath. Grooves are located on both sides of the square hole. A spring piece, made of elastic steel, contacts the rubber strip sheath within the square hole. The spring piece is bent when not subjected to external force. A cover plate presses the spring piece tightly, causing it to deform and undergo elastic deformation. The elastic force generated by the spring piece presses the rubber strip sheath tightly against the pressure-bearing surface and the groove, or the groove itself, thus locking the rubber strip sheath in place. When it is necessary to move the rubber strip sheath, the friction between the rubber strip sheath and the spring piece, the groove, and the pressure-bearing surface, or the friction between the rubber strip sheath and the spring piece and the groove, generated by the elastic force of the spring piece, is overcome, allowing the rubber strip sheath to move within the groove.

[0017] As a further preferred embodiment, the base has a hole or groove in the middle, through which a section of the rubber strip sheath is exposed. Both sides of the hole or groove have grooves. At least two rivets secure a pressure plate to the base. The pressure plate is made of elastic steel. When the rubber strip sheath is not inserted, the end of the pressure plate encroaches on the space of the groove. After the rubber strip sheath is inserted, the end of the pressure plate in the hole or groove is subjected to elastic force, which acts on the rubber strip sheath, causing it to press against the pressure-bearing surface and the groove, or the groove itself, thus locking the rubber strip sheath. When it is necessary to move the rubber strip sheath, the friction between the rubber strip sheath and the pressure plate, the groove, and the pressure-bearing surface, or the friction between the rubber strip sheath and the pressure plate and the groove, generated by the elastic force of the pressure plate, is overcome, allowing the rubber strip sheath to move within the groove.

[0018] As a preferred embodiment, when the length of the adhesive strip is 550 mm and the adhesive strip is perpendicular to the rod, the distance from the long side end face of the adhesive strip to the plane of symmetry of the rod on both sides of the rod can be greater than 410 mm than the distance from the short side end face of the adhesive strip to the plane of symmetry of the rod.

[0019] As a preferred embodiment, a limiting block is fixed on each of the rubber strip sleeves on both sides of the base, and the limiting block will not move into the groove.

[0020] As a further preferred embodiment, the limiting block is located in an area less than 12 mm from the end face of the rubber strip in both directions.

[0021] By implementing this invention, the rubber strip sleeve can easily move within the groove of the base. The base also features an elastic locking device. This mechanism applies the elastic force generated by the elastic deformation to the rubber strip sleeve, locking it in place. The magnitude of the elastic force is pre-designed to overcome the friction between the rubber strip sleeve and the object it contacts, allowing the rubber strip sleeve to move within the groove. This allows the rod to easily scrape a larger area of ​​the glass surface outside the window when the rod is horizontal and the rubber strip is vertical. Furthermore, the rubber strip sleeve can have a limiting block to prevent it from detaching during movement within the groove, resulting in a significantly improved performance. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a structural schematic diagram of the first embodiment of this utility model.

[0024] Figure 2 These are the front view, left view, and cross-sectional view of the base in this embodiment.

[0025] Figure 3 This is a schematic diagram of the structure of the second embodiment of this utility model.

[0026] Figure 4 This is a structural schematic diagram from another angle of this embodiment.

[0027] Figure 5 This is a structural schematic diagram of the third embodiment of this utility model.

[0028] Figure 6 This is a structural schematic diagram from another angle of this embodiment.

[0029] Figure 7 This is a structural schematic diagram of the fourth embodiment of this utility model.

[0030] Figure 8 This is a structural schematic diagram from another angle of this embodiment.

[0031] Figure 9 This is a structural schematic diagram of the fifth embodiment of this utility model.

[0032] Figure 10 This is a structural schematic diagram from another angle of this embodiment.

[0033] Figure 11 These are the front view and left view of this embodiment. Detailed Implementation

[0034] like Figure 1 and Figure 2As shown, a window cleaner includes a rod (1) and a scraper head. The scraper head includes a rubber strip (21), a rubber strip sleeve (22), and a base (23). The front part of the rubber strip (21) scrapes away dirt from the glass surface, and the rear part of the rubber strip (21) is fixed inside the rubber strip sleeve (22). The base (23) is connected to the end of the rod (1). The lower part of the rubber strip sleeve (22) is circular, and the groove is also circular. The groove has a small opening and a large inner opening to prevent the rubber strip sleeve (22) from detaching from the opening direction of the groove's cross-section. The rubber strip sleeve (22) and the groove are in sliding fit, and the rubber strip sleeve (22) can move easily in the groove. On the base (23), the groove is on one side, and the other side has a surface that supports the rubber strip sheath, which is the pressure-bearing surface (231). At least two rivets (233) fix a pressure plate (232) to the base. The pressure plate (232) is made of hardened steel sheet and is elastic. When the rubber strip sheath (22) is not installed, the end (A) of the pressure plate (232) intrudes into the space of the groove. After the rubber strip sheath (22) is installed, the end (A) of the pressure plate (232) is subjected to elastic force, which acts on the rubber strip sheath (22), causing the rubber strip sheath (22) to at least press against the pressure-bearing surface (231). Figure 2 As shown, the cross-sectional view is the cross-section of the groove. From the left view and cross-sectional view of the base (23), it can be seen that the bearing surface (231) is projected onto the cross-section of the groove. The projection of the outline of the bearing surface (231) coincides with a part of the outline of the groove. Therefore, the rubber strip sleeve (22) also presses the groove, and the rubber strip sleeve (22) is locked. The elastic force is designed so that when the rubber strip sleeve (22) needs to be moved, the friction between the rubber strip sleeve (22) and the pressure plate (232), the groove and the bearing surface (231) generated by overcoming the elastic force of the pressure plate (232) can be overcome. The rubber strip sleeve (22) can move in the groove. Figure 1 As shown, the two ends of the adhesive strip sheath (22) are fixed with and as shown Figure 3 The same limit block shown will not be discussed here.

[0035] like Figure 3 and Figure 4 As shown, a window cleaner includes a rod (1) and a scraper head. The scraper head includes a rubber strip (21), a rubber strip sleeve (22), and a base (23). The front part of the rubber strip (21) scrapes away dirt from the glass surface, and the rear part of the rubber strip (21) is fixed inside the rubber strip sleeve (22). The base (23) is connected to the end of the rod (1). Figure 3 and Figure 4As shown, the lower part of the adhesive strip sleeve (22) is circular, and the groove is also circular. The groove has a small opening and a large inner opening, which can prevent the adhesive strip sleeve (22) from detaching from the opening direction of the cross-section of the groove. The adhesive strip sleeve (22) and the groove are in sliding fit, and the adhesive strip sleeve (22) can move easily in the groove. There is a through hole in the middle of the base (23). The through hole has no pressure-bearing surface. There are grooves on both sides of the through hole. The solid part in the middle of the through hole is a cantilever beam. In the natural state, part of the solid part of the cantilever beam invades the space of the groove. The rubber strip sleeve (22) can be inserted into the groove by forcefully prying off the part of the solid part of the cantilever beam that has invaded the groove. After being inserted, the cantilever beam undergoes elastic deformation, and the resulting elastic force presses the rubber strip sleeve (22) tightly, so that the rubber strip sleeve (22) presses the groove tightly and the rubber strip sleeve (22) is locked. The magnitude of the elastic force is designed to overcome the friction between the rubber strip sleeve (22) and the cantilever beam and the groove generated by the elastic force of the cantilever beam. The rubber strip sleeve (22) can move in the groove. On each side of the base (23), a limiting block (221) is fixed to the rubber strip sheath (22) with countersunk screws (222). The limiting blocks (221) have a uniform wall thickness of 2.2 mm. The 2.2 mm wall thickness covers the outer surface of the rubber strip sheath and therefore will not move into the groove. Figure 1 As shown, the limiting block (221) covers the end face and 5 mm long outer surface of the rubber strip sheath (22). Therefore, the limiting block (221) is 2.2 mm and 5 mm away from the end face of the rubber strip sheath (22) in two directions, which are both less than 12 mm.

[0036] like Figure 5 and Figure 6 As shown, a window cleaner includes a rod (1) and a scraper head. The scraper head includes a rubber strip (21), a rubber strip sleeve (22), and a base (23). The front part of the rubber strip (21) scrapes away dirt from the glass surface, and the rear part of the rubber strip (21) is fixed inside the rubber strip sleeve (22). The base (23) is connected to the end of the rod (1). The lower part of the rubber strip sleeve (22) is circular, and the groove is also circular. The groove has a small opening and a large inner opening to prevent the rubber strip sleeve (22) from detaching from the opening direction of the groove's cross-section. The rubber strip sleeve (22) and the groove are in a sliding fit, and the rubber strip sleeve (22) can move easily within the groove. The upper part of the groove has two circular holes, and the groove is located on both sides of each circular hole. The circular holes are blind holes. Figure 6As shown, the bottom surface of the blind hole is the pressure-bearing surface (231). The pressure-bearing surface (231) and the surface of the groove are continuous surfaces without interruption. Correspondingly, two locking blocks (232) pass through the circular hole and contact the rubber strip sleeve (22). Behind the locking blocks (232), a compressed spring (233) is installed. Two outer shells (234) are fixed on the outside with two screws (235). The elastic force generated by the spring (233) presses the outer shell (234) through the locking blocks (232). The rubber strip sleeve (22) presses against the pressure surface (231) and the groove, locking the rubber strip sleeve (22). When the rubber strip sleeve (22) needs to be moved, the elastic force generated by the spring (233) is designed to overcome the friction between the rubber strip sleeve (22) and the locking block (231), the groove, and the pressure surface (231) generated by the elastic force of the spring (233), allowing the rubber strip sleeve (22) to move within the groove. Figure 5 and Figure 6 In the middle, the two ends of the rubber strip sheath (22) are fixed with and as shown Figure 3 The same limit block shown will not be discussed here.

[0037] like Figure 7 and Figure 8 As shown, a window cleaner includes a rod (1) and a scraper head. The scraper head includes a rubber strip (21), a rubber strip sleeve (22), and a base (23). The front part of the rubber strip (21) scrapes away dirt from the glass surface, and the rear part of the rubber strip (21) is fixed inside the rubber strip sleeve (22). The base (23) is connected to the end of the rod (1). Figure 7 and Figure 8 As shown, the lower part of the adhesive strip sleeve (22) is circular, and the groove is also circular. The groove has a small opening and a large inner opening, which prevents the adhesive strip sleeve (22) from detaching from the cross-sectional opening of the groove. The adhesive strip sleeve (22) and the groove are in a sliding fit, and the adhesive strip sleeve (22) can move easily in the groove. There is a square hole in the middle of the base (23), through which a section of the adhesive strip sleeve is exposed, and the square hole is a blind hole. Figure 8As shown, the bottom surface of the blind hole is the pressure-bearing surface (231). The pressure-bearing surface (231) and the surface of the groove are continuous surfaces without interruption. There are grooves on both sides of the square hole. Inside the square hole, there is a spring piece (232) in contact with the rubber strip sleeve (22). The spring piece (232) is bent when not subjected to external force. The cover plate (233) is fixed with four screws (234) and presses the spring piece (232) tightly. The spring piece (232) is deformed by pressure and undergoes elastic deformation. The generated elastic force presses the rubber strip sleeve (22) tightly, causing the rubber strip sleeve (22) to press against the pressure surface (231) and the groove. The rubber strip sleeve (22) is locked. When the rubber strip sleeve (22) needs to be moved, the elastic force generated by the spring piece (232) is designed to overcome the friction between the rubber strip sleeve (22) and the spring piece (232), the groove, and the pressure surface (231) generated by the elastic force of the spring piece (232). The rubber strip sleeve (22) can move in the groove. Figure 7 and Figure 8 In the middle, the two ends of the rubber strip sheath (22) are fixed with and as shown Figure 3 The same limit block shown will not be discussed here.

[0038] like Figure 9 , Figure 10 and Figure 11As shown, a window cleaner includes a rod (1) and a scraper head. The scraper head includes a rubber strip (21), a rubber strip sleeve (22), and a base (23). The front part of the rubber strip (21) scrapes away dirt from the glass surface, and the rear part of the rubber strip (21) is fixed inside the rubber strip sleeve (22). The base (23) is connected to the end of the rod (1). The rear part of the rubber strip sleeve (22) is circular, and the groove is also circular. The groove has a small opening and a large inner opening to prevent the rubber strip sleeve (22) from detaching from the cross-sectional opening direction of the groove. The rubber strip sleeve (22) and the groove are in sliding fit, and the rubber strip sleeve (22) can move easily in the groove. There is a groove in the middle of the base (23), and the groove is a through groove. There is no pressure-bearing surface in the through groove. A section of the rubber strip sheath (22) is exposed in the through groove. There are grooves on both sides of the through groove. A pressure plate (231) is fixed to the base (23) with two rivets (232). The pressure plate (231) is made of steel sheet after quenching and has elasticity. When the rubber strip sheath (22) is not installed, the end (A) of the pressure plate (231) invades the space of the groove. When the rubber strip sheath (22) is installed... After that, the end (A) of the pressure plate (231) is subjected to the elastic force, which is applied to the rubber strip sleeve (22), so that the rubber strip sleeve (22) presses the groove tightly and the rubber strip sleeve (22) is locked. When it is necessary to move the rubber strip sleeve (22), the magnitude of the elastic force generated by the pressure plate (231) is designed to overcome the friction between the rubber strip sleeve (22) and the pressure plate (231) and the groove generated by the elastic force of the pressure plate (231), so that the rubber strip sleeve (22) can move in the groove.

[0039] like Figure 9 , Figure 10 and Figure 11 As shown, one screw (221) is fixed on each of the rubber strip sleeves (22) on both sides of the base (23). The screw head of each screw (221) has a diameter of 4 mm and a height of 2 mm. The screws (221) will not move into the groove. The rubber strip sleeve (22) can only move between the two screws (221) in the groove, thus the two screws (221) act as limiting blocks. The two screws (221) are each 6 mm away from the end face of the rubber strip sleeve (22). Therefore, the screws (221) are all in areas less than 12 mm away from the end face of the rubber strip sleeve (22). Figure 11As shown, the length of the adhesive strip (21) is 550 mm, the length of the adhesive strip sleeve (22) is 536 mm, the distance from the hole of the screw (221) to the end face of the adhesive strip sleeve (22) is 6 mm, the diameter of the screw head is 4 mm, and the width of the base is 90 mm. Therefore, the distance the adhesive strip sleeve (22) can move between the two screws (221) in the groove is 536 - 6 - 6 - 4 / 2 - 4 / 2 = 520 mm. On both sides of the rod (1), the distance from the long side end face of the adhesive strip to the symmetrical plane of the rod is 550 - 90 / 2 - (550 - 520) / 2 = 490 mm, and the distance from the short side end face of the adhesive strip to the symmetrical plane of the rod is 90 / 2 + (550 - 520) / 2 = 60 mm. The difference is 490 - 60 = 430 mm, which is greater than 410 mm. Figure 11 As shown, the width of the end face of the rubber strip sheath (22) is 9 mm, which is greater than 8 mm. Additionally, there is a rib running through the entire width. This improves the bending strength in the width direction.

[0040] It should be noted that the above description and specific embodiments only illustrate five representative structural solutions and do not provide a comprehensive description. Therefore, they should not be construed as limiting the scope of protection of this utility model. The scope of protection of this utility model is determined by the appended claims.

Claims

1. A glass cleaner, comprising a rod and a scraper head, the scraper head comprising a rubber strip, a rubber strip sheath, and a base, the rubber strip being fixed within the rubber strip sheath, the rubber strip sheath being within a groove in the base, and the base being connected to the end of the rod, characterized in that: The groove has a structure to prevent the adhesive strip sheath from detaching from the cross-sectional opening of the groove, allowing the adhesive strip sheath to move within the groove. The base also has an elastic locking device with a mechanism for generating elastic deformation. The elastic locking device contacts the adhesive strip sheath, and the mechanism applies the elastic force generated by the elastic deformation to the adhesive strip sheath. The base may have a pressure-bearing surface, which is a surface opposite the elastic locking device, separated from the adhesive strip sheath. If the base has the pressure-bearing surface, the adhesive strip sheath at least presses against the pressure-bearing surface, and the adhesive strip sheath is locked. If there is no pressure-bearing surface, the adhesive strip sheath only presses against the groove, and the adhesive strip sheath is also locked. When it is necessary to move the adhesive strip sheath, the friction between the adhesive strip sheath and the contacting object generated by the elastic force is overcome, allowing the adhesive strip sheath to move within the groove.

2. A glass cleaner according to claim 1, characterized in that: With the cross-section of the groove as the projection plane, the outline of the projection of the pressure-bearing surface coincides with a portion of the outline of the groove. In this case, the rubber strip sleeve presses the pressure-bearing surface and the groove together.

3. A glass cleaner according to claim 2, characterized in that: The base has a hole or groove intersecting the groove, and the elastic locking device only contacts the rubber strip sleeve within the hole or groove; when the hole or groove is a blind hole or blind groove, the pressure-bearing surface can be the bottom surface of the blind hole or blind groove, and the bottom surface can be connected to the surface of the groove without gap; when the hole or groove is a through hole or through groove, there is no pressure-bearing surface within the through hole or through groove, and the rubber strip sleeve only presses against the groove.

4. A glass cleaner according to claim 2, characterized in that: The groove has a cross-section that is smaller at the opening and larger at the inside, preventing the rubber strip sheath from falling off from the opening of the groove's cross-section. The rubber strip sheath can move within the groove. On the base, the groove is on one side, and the other side has a surface supporting the rubber strip sheath; this surface is the pressure-bearing surface. At least two rivets secure a pressure plate to the base. The pressure plate is made of elastic steel sheet. When the rubber strip sheath is not installed, the end of the pressure plate intrudes into the space of the groove. After the rubber strip sheath is installed, the end of the pressure plate is subjected to elasticity. The force exerted causes the elastic force on the rubber strip sleeve, causing the rubber strip sleeve to press against the pressure-bearing surface. The pressure-bearing surface has its cross-section of the groove as its projection surface, and the projection of the contour line of the pressure-bearing surface coincides with a portion of the contour line of the groove. Therefore, the rubber strip sleeve also presses against the groove, and the rubber strip sleeve is locked. When it is necessary to move the rubber strip sleeve, the frictional force between the rubber strip sleeve and the pressure plate, the groove, and the pressure-bearing surface generated by overcoming the elastic force of the pressure plate allows the rubber strip sleeve to move within the groove.

5. A glass cleaner according to claim 3, characterized in that: The base has a hole or groove in the middle, which communicates with the recess. Recesses are located on both sides of the hole or groove. The solid portion in the middle of the hole or groove is a cantilever beam. In its natural state, a portion of the cantilever beam intrudes into the space of the recess. By forcefully prying away the portion of the cantilever beam that has intruded into the recess, the rubber strip can be inserted into the recess. After insertion, the cantilever beam undergoes elastic deformation, generating a spring force that presses the rubber strip tightly against the pressure-bearing surface and the recess, thus locking the rubber strip. When it is necessary to move the rubber strip, the friction between the rubber strip and the cantilever beam, the recess, and the pressure-bearing surface, or the friction between the rubber strip and the cantilever beam and the recess, generated by the elastic force of the cantilever beam, is overcome, allowing the rubber strip to move within the recess.

6. A glass cleaner according to claim 3, characterized in that: The base has at least one hole communicating with the groove, and the groove is located on both sides of the hole. At least one locking block passes through the hole and contacts the rubber strip sleeve. Behind the locking block, a compressed spring is installed. The elastic force generated by the spring presses the rubber strip sleeve against the locking block, causing the rubber strip sleeve to press against the pressure surface and the groove, or the groove, thus locking the rubber strip sleeve. When it is necessary to move the rubber strip sleeve, the friction between the rubber strip sleeve and the locking block, the groove, and the pressure surface, or the friction between the rubber strip sleeve and the locking block and the groove, generated by the elastic force of the locking block, is overcome, and the rubber strip sleeve can move within the groove.

7. A glass cleaner according to claim 3, characterized in that: A square hole is located in the center of the base, exposing a section of the rubber strip sheath. Grooves are located on both sides of the square hole. A spring piece, made of elastic steel, contacts the rubber strip sheath within the square hole. The spring piece is bent when not under external force. A cover plate presses the spring piece tightly, causing it to deform and elastically deform. The elastic force generated by the spring piece presses the rubber strip sheath tightly against the pressure surface and the groove, or the groove itself, thus locking the rubber strip sheath in place. When it is necessary to move the rubber strip sheath, the friction between the rubber strip sheath and the spring piece, the groove, and the pressure surface, or the friction between the rubber strip sheath and the spring piece and the groove, generated by the elastic force of the spring piece, is overcome, allowing the rubber strip sheath to move within the groove.

8. A glass cleaner according to claim 3, characterized in that: The base has a hole or groove in the middle, through which a section of the rubber strip sheath is exposed. Both sides of the hole or groove have grooves. At least two rivets secure a pressure plate to the base. The pressure plate is made of elastic steel. When the rubber strip sheath is not inserted, the end of the pressure plate encroaches on the space of the groove. After the rubber strip sheath is inserted, the end of the pressure plate in the hole or groove is subjected to elastic force, which acts on the rubber strip sheath, causing it to press against the pressure surface and the groove, or the groove itself, thus locking the rubber strip sheath. When it is necessary to move the rubber strip sheath, the friction between the rubber strip sheath and the pressure plate, the groove, and the pressure surface, or the friction between the rubber strip sheath and the pressure plate and the groove, generated by the elastic force of the pressure plate, is overcome, allowing the rubber strip sheath to move within the groove.

9. A glass cleaner according to claim 1, characterized in that: When the length of the adhesive strip is 550 mm and the adhesive strip is perpendicular to the rod, on both sides of the rod, the distance from the long side end face of the adhesive strip to the plane of symmetry of the rod is greater than 410 mm than the distance from the short side end face of the adhesive strip to the plane of symmetry of the rod.

10. A glass cleaner according to claim 1, characterized in that: One limiting block is fixed on each of the rubber strip sleeves on both sides of the base, and the limiting blocks will not move into the groove.

11. A glass cleaner according to claim 10, characterized in that: The limiting block is located in an area less than 12 mm from the end face of the rubber strip in both directions.

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