Door and window handle
By designing a limiting ring and a limiting seat, combined with the meshing of gears and racks, the problem of preventing accidental operation of existing door and window handles is solved, thereby enhancing the safety of doors and windows.
Patent Information
- Application Number
- CN202423162915.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing door and window handles lack anti-misoperation features, making it easy for children to accidentally open doors and windows, posing a safety hazard.
A door and window handle was designed. Through the cooperation of a limiting ring and a limiting seat, the handle body needs to be pressed and then rotated to prevent accidental opening. Combined with the meshing of gears and racks, stable linear movement is achieved, which drives the doors and windows to open and close.
It improves the safety of doors and windows, prevents accidental opening without human intervention, and enhances child safety.
Smart Images
Figure CN223647547U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of door and window components, specifically a door and window handle. Background Technology
[0002] Handles, also known as levers or levers, are commonly used in building decoration and furniture making to open and close doors, windows, and drawers. A handle is a device installed on a door or window sash that serves both to open and close the door / window and to secure it to the frame. When the door or window is closed, the handle, along with other accessories, firmly locks the opening door / window sash to the fixed frame, thus fixing the relative position of the inner and outer frames. Door and window handles come in various types, including lockable and unlockable handles. Lockable handles can be used with locks or other actuators to enhance functionality and security.
[0003] Based on the above, the inventors have discovered the following problems: Currently, doors and windows are generally locked by door and window handles to prevent children from accidentally opening them. However, current door and window handles do not have the function of preventing accidental operation. The handle body can be turned at any time to open the door or window. When a child accidentally opens the door or window, it is easy for the child to open the window, climb out of the window, or open the door to go out, which poses certain safety hazards.
[0004] Therefore, in view of this, we will study and improve the existing structure and its shortcomings to provide a door and window handle with greater practical value. Utility Model Content
[0005] The purpose of this utility model is to provide a door and window handle to solve the problems mentioned in the background art.
[0006] In view of the above problems, the technical solution proposed by this utility model is as follows:
[0007] A door and window handle includes a base assembly, the base assembly including a mounting base, a fixing cover connected to the inner wall of the mounting base, a square shaft connected to the center of the fixing cover via a bearing, the square shaft having a slot at one end near the inner wall of the mounting base, a handle assembly on the back of the mounting base, the handle assembly including a fixing base, one end of the fixing base being connected to the back of the mounting base, and a first circular plate movably disposed on one side of the fixing base, a rod connected to the front of the first circular plate, a second circular plate connected to the fixing base near the mounting base via a bearing, a first spring connecting the first circular plate and the second circular plate, a pressing rod connected to the end of the first circular plate away from the spring, the pressing rod extending through the fixing base to the outside at the end away from the first circular plate, and having a handle body thereon.
[0008] Furthermore, a square groove is provided at the center of the second circular plate, and the insert rod, the square groove, and the slot are all located on the same axis, and the insert rod is fitted with the square groove and the slot with a clearance.
[0009] The beneficial effect of adopting the above-mentioned further solution is that by opening a square groove at the center of the second circular plate, the shape of the insertion rod is also square. When the insertion rod is inserted into the slot through the square groove, the insertion rod is rotated to complete the rotation of the square shaft.
[0010] Furthermore, a limiting ring is connected inside the end of the extrusion rod away from the first circular plate, and a limiting seat is inserted inside the limiting ring. One end of the limiting seat is connected to one end of the handle body. The limiting seat is gear-shaped, and the outer wall of the limiting seat is in clearance fit with the inner wall of the limiting ring.
[0011] The beneficial effect of adopting the above-mentioned further solution is that, through the cooperation of the limiting ring and the limiting seat, since the limiting seat is gear-shaped, the outer wall of the limiting seat has several external teeth, and the outer wall of the limiting seat and the inner wall of the limiting ring are in clearance fit, so that the inner wall of the limiting ring has several internal teeth. When the limiting seat and the limiting ring at one end of the handle body are aligned, the handle body is pushed forward to facilitate the insertion between the squeezing rod and the handle body. When the handle body is rotated, the squeezing rod will be driven to rotate.
[0012] Furthermore, the extrusion rod and the handle body are respectively provided with a pair of first cavities and a pair of second cavities at opposite ends. The inner walls of the pair of first cavities are connected with first J-shaped buckles, and the interiors of the pair of second cavities are provided with second J-shaped buckles. Adjacent first J-shaped buckles and second J-shaped buckles are engaged and connected.
[0013] The beneficial effect of adopting the above-mentioned further solution is that, through the cooperation of the first J-shaped buckle and the second J-shaped buckle, the first J-shaped buckle and the second J-shaped buckle are engaged, preventing the handle body from falling off the squeezing rod when the handle body is pulled outward. When the handle body breaks and the handle body needs to be removed, the first J-shaped buckle and the second J-shaped buckle are separated, thereby realizing the separation of the handle body from the squeezing rod.
[0014] Furthermore, each of the outer walls of the pair of second J-shaped buckles is connected to a connecting block, and each of the two connecting blocks is connected to a sliding rod at one of its opposite ends. Each of the two sliding rods extends through the handle body to the outside, and each of the two sliding rods is fitted with a second spring. The two ends of the second spring are respectively connected to the inner wall of the second cavity and the outer wall of the connecting block.
[0015] The beneficial effect of adopting the above-mentioned further solution is that by setting two sliding rods, when the two sliding rods are pulled to both sides, the two connecting blocks will move and compress the second spring, thereby causing the opposite ends of the two second J-shaped buckles to fit against the inner wall of the second cavity. At this time, there is a distance between the left bent part of the second J-shaped buckle and the right bent part of the first J-shaped buckle, so that the second J-shaped buckle is separated from the first J-shaped buckle, thus making it easier to pull the handle body outward and remove the handle body.
[0016] Furthermore, a gear is sleeved on the outside of the square shaft, and a slide bar is connected to the inner wall of the fixed cover on both sides of the gear. A rack is slidably connected to the outside of one of the slide bars, and a shift fork is connected to the front of the rack. A decorative plate is embedded on the front of the mounting base, and one end of the shift fork extends through the decorative plate to the outside.
[0017] The beneficial effect of adopting the above-mentioned further solution is that by sleeved a gear on the outside of the square shaft, when the square shaft rotates, the gear will rotate. Due to the meshing of the gear and the rack, the rack can achieve stable linear movement under the sliding action of the slide bar, thereby causing the shift fork to move up or down. That is, the shift fork can lock the transmission rod or the transmission device, control its up and down movement, and thus drive the opening and closing of the door and window.
[0018] Furthermore, the inner wall of the mounting base is connected to a pair of positioning posts near the upper and lower ends of the fixing cover. The front of both pairs of positioning posts is in contact with the back of the decorative panel. The outer side of the mounting base is provided with a first threaded hole near the positioning post. The decorative panel is provided with a second threaded hole near the positioning post. Bolts are connected between the first threaded hole, the positioning post and the second threaded hole.
[0019] The beneficial effect of adopting the above-mentioned further solution is that by setting positioning posts, the number of positioning posts is four, and the internal threads of the positioning posts are provided. By passing the first threaded hole, the positioning post and the second threaded hole, the bolt can pass through the first threaded hole, the positioning post and the second threaded hole to realize the connection between the mounting base and the decorative panel. At the same time, it is also convenient to install the mounting base on the door and window.
[0020] Furthermore, the back of the mounting base is provided with a cover plate, the front of the cover plate is in contact with the back of the mounting base, and a circular hole is provided in the center of the cover plate. One end of the fixing base extends through the circular hole to the outside, and the outer wall of the fixing base is connected to the inner wall of the circular hole by a bearing.
[0021] The beneficial effect of adopting the above-mentioned further solution is that by setting a cover plate, the front of the cover plate fits against the back of the mounting base, so that the cover plate protects and blocks the bolts exposed on the back of the mounting base. At the same time, when it is necessary to remove the bolts, the cover plate can be rotated to rotate outside the mounting base to expose the bolts.
[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: When the door and window handle needs to be opened, the handle body is first squeezed, causing it to push the squeezing rod into the interior of the fixed seat. This causes the first circular plate to move inside the fixed seat, reducing the distance between the first and second circular plates. At this time, the first spring is continuously compressed, allowing the insertion rod to pass through the square groove at the center of the second circular plate and enter the slot opened inside the square shaft. Since the outer wall of the second circular plate is connected to the inner wall of the fixed seat through a bearing, the handle body is then rotated, causing the squeezing rod to move further into the fixed seat. The rotation of the pressure rod, the first circular plate, the first spring, the second circular plate, and the insert rod drives the square shaft to rotate, thereby rotating the gear. Due to the meshing of the gear and the rack, the rack achieves stable linear movement under the sliding action of the slide bar, which in turn causes the shift fork to move up or down. That is, the shift fork can lock the transmission rod or the transmission device, controlling its up and down movement, thereby driving the opening and closing of the door and window. When using this door and window handle, the handle body needs to be pressed first and then rotated to prevent accidental operation and prevent the door and window from being opened unexpectedly without human intervention, thereby improving the safety of the door and window. Attached Figure Description
[0023] Figure 1 A three-dimensional structural diagram of a door and window handle provided by this utility model. Figure 1 ;
[0024] Figure 2 A three-dimensional structural diagram of a door and window handle provided by this utility model. Figure 2 ;
[0025] Figure 3 An exploded three-dimensional structural diagram of a base assembly for a door and window handle provided by this utility model;
[0026] Figure 4 An exploded three-dimensional structural diagram of the handle body of a door and window handle provided by this utility model;
[0027] Figure 5 This utility model provides a side sectional structural diagram of the extrusion rod and handle body of a door and window handle.
[0028] In the diagram: 100, base assembly; 1001, mounting base; 1002, fixing cover; 1003, square shaft; 1004, slot; 1005, gear; 1006, rack; 1007, shift fork; 1008, decorative panel; 1009, positioning post; 1010, cover plate; 200, handle assembly; 2001, fixing base; 2002, first circular plate; 2003, insertion rod; 2004, second circular plate; 2005, first spring; 2006, compression rod; 2007, limiting ring; 2008, limiting seat; 2009, handle body; 2010, first J-shaped buckle; 2011, second J-shaped buckle; 2012, connecting block; 2013, slide rod; 2014, second spring. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] Please see Figures 1-5This utility model provides a technical solution: a door and window handle, including a base assembly 100, the base assembly 100 including a mounting base 1001, a fixing cover 1002 connected to the inner wall of the mounting base 1001, a square shaft 1003 connected to the center of the fixing cover 1002 via a bearing, the square shaft 1003 having a slot 1004 at one end near the inner wall of the mounting base 1001, and a handle assembly 200 provided on the back of the mounting base 1001, the handle assembly 200 including a fixing base 2001, one end of the fixing base 2001 being connected to... The mounting base 1001 is connected to the back, and a first circular plate 2002 is movably provided on one side of the interior of the fixing base 2001. A plug rod 2003 is connected to the front of the first circular plate 2002. A second circular plate 2004 is connected to the fixing base 2001 near the interior of the mounting base 1001 via a bearing. A first spring 2005 is connected between the first circular plate 2002 and the second circular plate 2004. A pressing rod 2006 is connected to the end of the first circular plate 2002 away from the spring. The end of the pressing rod 2006 away from the first circular plate 2002 passes through the fixing base. 2001 extends to the outside and is equipped with a handle body 2009. When it is necessary to open the door or window, the handle body 2009 is first squeezed, which pushes the squeezing rod 2006 into the interior of the fixed base 2001. This causes the first circular plate 2002 to move inside the fixed base 2001, reducing the distance between the first circular plate 2002 and the second circular plate 2004. At this time, the first spring 2005 is continuously squeezed and is in a compressed state, which allows the insertion rod 2003 to pass through the square groove at the center of the second circular plate 2004 and enter the square shaft 1003. Inside the slot 1004, the outer wall of the second circular plate 2004 is connected to the inner wall of the fixing seat 2001 by a bearing. Then, rotating the handle body 2009 causes the pressing rod 2006, the first circular plate 2002, the first spring 2005, the second circular plate 2004 and the insert rod 2003 to rotate, thereby driving the square shaft 1003 to rotate. When using this door and window handle, it is necessary to press the handle body 2009 first and then rotate the handle body 2009 to prevent accidental operation and prevent the door and window from being opened accidentally without human operation, thereby improving the safety of the door and window.
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] Please see Figures 1-5This utility model provides a technical solution: a square groove is formed at the center of the second circular plate 2004; the insertion rod 2003, the square groove, and the slot 1004 are all located on the same axis, and the insertion rod 2003 is clearance-fitted with the square groove and the slot 1004; a limiting ring 2007 is internally connected to the end of the extrusion rod 2006 away from the first circular plate 2002; a limiting seat 2008 is inserted inside the limiting ring 2007; one end of the limiting seat 2008 is connected to one end of the handle body 2009; the limiting seat 2008 is gear-shaped, and the outer wall of the limiting seat 2008 is clearance-fitted with the inner wall of the limiting ring 2007; a pair of first cavities and a pair of second cavities are respectively formed at the opposite ends of the extrusion rod 2006 and the handle body 2009; the pair of first cavities... Each inner wall is connected to a first J-shaped buckle 2010, and each of the two second cavities is provided with a second J-shaped buckle 2011. Adjacent first J-shaped buckles 2010 and second J-shaped buckles 2011 are engaged with each other. Each pair of second J-shaped buckles 2011 has a connecting block 2012 connected to its outer wall. Each of the two connecting blocks 2012 has a sliding rod 2013 connected to its opposite ends. Each of the two sliding rods 2013 has its opposite ends extending through the handle body 2009 to the outside. Each of the two sliding rods 2013 has a second spring 2014 sleeved on its outside. The two ends of the second spring 2014 are respectively connected to the inner wall of the second cavity and the outer wall of the connecting block 2012. By opening a square groove in the center of the second circular plate 2004, the shape of the insertion rod 2003 is also square. When the insertion rod 2003 is inserted into the slot 1004 through the square groove, rotating the insertion rod 2003 completes the rotation of the square shaft 1003. Through the cooperation of the limiting ring 2007 and the limiting seat 2008, since the limiting seat 2008 is gear-shaped, its outer wall has several external teeth. The outer wall of the limiting seat 2008 and the inner wall of the limiting ring 2007 are in clearance fit, resulting in several internal teeth on the inner wall of the limiting ring 2007. When the limiting seat 2008 and the limiting ring 2007 at one end of the handle body 2009 are aligned, the handle body 2009 is pushed forward, facilitating the insertion of the pressing rod 2006 and the handle body 2009. When the handle body 2009 is rotated, it drives the pressing rod 2006 to rotate, through the first J... The use of the first J-shaped buckle 2010 and the second J-shaped buckle 2011 is such that, due to the interlocking between the first J-shaped buckle 2010 and the second J-shaped buckle 2011, the handle body 2009 is prevented from falling off the compression rod 2006 when pulled outward. When the handle of the handle body 2009 breaks and needs to be removed, the first J-shaped buckle 2010 and the second J-shaped buckle 2011 separate, thus separating the handle body 2009 from the compression rod 2006. When the two sliding rods 2013 are pulled to both sides, the two connecting blocks 2012 move, compressing the second spring 2014, causing the opposite ends of the two second J-shaped buckles 2011 to fit against the inner wall of the second cavity.At this point, there is a distance between the left bent portion of the second J-shaped buckle 2011 and the opposite end of the right bent portion of the first J-shaped buckle 2010, causing the second J-shaped buckle 2011 to separate from the first J-shaped buckle 2010. This facilitates pulling the handle body 2009 outward and removing it.
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] Please see Figures 1-5This utility model provides a technical solution: a gear 1005 is sleeved on the outside of a square shaft 1003; a sliding strip is connected to the inner walls of the fixing cover 1002 on both sides of the gear 1005; a rack 1006 is slidably connected to the outside of one of the sliding strips; a shift fork 1007 is connected to the front of the rack 1006; a decorative plate 1008 is embedded in the front of the mounting base 1001; one end of the shift fork 1007 extends outward through the decorative plate 1008; a pair of positioning pins 1009 are connected to the inner wall of the mounting base 1001 near the upper and lower ends of the fixing cover 1002. The front of each positioning post 1009 is flush with the back of the decorative panel 1008. A first threaded hole is provided on the exterior of the mounting base 1001 near the positioning post 1009. A second threaded hole is provided on the decorative panel 1008 near the positioning post 1009. Bolts connect the corresponding first threaded holes, positioning posts 1009, and second threaded holes. A cover plate 1010 is provided on the back of the mounting base 1001. The front of the cover plate 1010 is flush with the back of the mounting base 1001, and a circular hole is provided in the center of the cover plate 1010. One end of the fixing base 2001 passes through the circular hole. Extending to the outside, the outer wall of the fixed seat 2001 is connected to the inner wall of the circular hole via a bearing. A gear 1005 is sleeved on the outside of the square shaft 1003. When the square shaft 1003 rotates, the gear 1005 rotates. Because the gear 1005 meshes with the rack 1006, the rack 1006 achieves stable linear movement under the sliding action with the slide bar, thereby causing the shift fork 1007 to move up or down. That is, the shift fork 1007 can engage the transmission rod or actuator, controlling its up and down movement, thus driving the opening and closing of the door and window. This is achieved through the first threaded hole and the positioning post. The first threaded hole 1009 and the second threaded hole facilitate the bolts to pass through the first threaded hole, the positioning post 1009 and the second threaded hole, so as to realize the connection between the mounting base 1001 and the decorative panel 1008. It also facilitates the installation of the mounting base 1001 on the door and window. By setting the cover plate 1010, the front of the cover plate 1010 fits against the back of the mounting base 1001, so that the cover plate 1010 protects and blocks the bolts exposed on the back of the mounting base 1001. At the same time, when it is necessary to remove the bolts, the cover plate 1010 can be rotated to rotate outside the fixing base 2001 to expose the bolts.
[0035] Specifically, the working principle of this type of door and window handle is as follows: When it is necessary to open the door or window, firstly, the handle body 2009 is squeezed, which pushes the squeezing rod 2006 into the interior of the fixed base 2001. This causes the first circular plate 2002 to move inside the fixed base 2001, reducing the distance between the first circular plate 2002 and the second circular plate 2004. At this time, the first spring 2005 is continuously compressed, causing the insertion rod 2003 to pass through the square groove at the center of the second circular plate 2004 and enter the slot 100 opened in the square shaft 1003. 4. Internally, since the outer wall of the second circular plate 2004 is connected to the inner wall of the fixed seat 2001 through a bearing, and then the handle body 2009 is rotated, the pressing rod 2006, the first circular plate 2002, the first spring 2005, the second circular plate 2004 and the insert rod 2003 rotate, thereby driving the square shaft 1003 to rotate. By sleeved a gear 1005 on the outside of the square shaft 1003, when the square shaft 1003 rotates, the gear 1005 will rotate. Since the gear 1005 meshes with the rack 1006, the rack 1006 slides against the slide bar. The action achieves stable linear movement, thereby causing the shift fork 1007 to move up or down. The shift fork 1007 can engage the transmission rod or actuator, controlling its up-and-down movement, thus driving the opening and closing of doors and windows. When the handle body 2009 breaks and needs to be removed, the first J-shaped buckle 2010 and the second J-shaped buckle 2011 separate, thus separating the handle body 2009 from the pressing rod 2006. When the two sliding rods 2013 are pulled to the sides, the two connecting blocks 2012 move, and the second spring 20... When the second spring 2014 is compressed during the compression, the opposite ends of the two second J-shaped buckles 2011 are pressed against the inner wall of the second cavity. At this time, there is a distance between the left bent part of the second J-shaped buckle 2011 and the right bent part of the first J-shaped buckle 2010, so that the second J-shaped buckle 2011 and the first J-shaped buckle 2010 are separated. This makes it easier to pull the handle body 2009 outward, so that the limiting seat 2008 and the limiting ring 2007 are separated. The handle body 2009 is then removed, and the intact handle body 2009 and the compression rod 2006 are installed.
Claims
1. A door and window handle, characterized in that, The system includes a base assembly (100), which includes a mounting base (1001). A fixing cover (1002) is connected to the inner wall of the mounting base (1001). A square shaft (1003) is connected to the center of the fixing cover (1002) via a bearing. A slot (1004) is provided inside the square shaft (1003) at one end near the inner wall of the mounting base (1001). A handle assembly (200) is provided on the back of the mounting base (1001). The handle assembly (200) includes a fixing seat (2001), one end of which is connected to the back of the mounting base (1001). A first circular plate (2002) is movably provided on one side of the interior of the fixture (2001). A plug rod (2003) is connected to the front of the first circular plate (2002). A second circular plate (2004) is connected to the fixture (2001) via a bearing inside the fixture (1001). A first spring (2005) is connected between the first circular plate (2002) and the second circular plate (2004). A pressing rod (2006) is connected to the end of the first circular plate (2002) away from the spring. The end of the pressing rod (2006) away from the first circular plate (2002) extends through the fixture (2001) to the outside and is provided with a handle body (2009).
2. A door and window handle according to claim 1, characterized in that, A square groove is provided at the center of the second circular plate (2004). The insert rod (2003), the square groove and the slot (1004) are all located on the same axis, and the insert rod (2003) is clearance-fitted with the square groove and the slot (1004).
3. A door and window handle according to claim 2, characterized in that, The end of the extrusion rod (2006) away from the first circular plate (2002) is internally connected to a limiting ring (2007). A limiting seat (2008) is inserted inside the limiting ring (2007). One end of the limiting seat (2008) is connected to one end of the handle body (2009). The limiting seat (2008) is gear-shaped, and the outer wall of the limiting seat (2008) is in clearance fit with the inner wall of the limiting ring (2007).
4. A door and window handle according to claim 3, characterized in that, The extrusion rod (2006) and the handle body (2009) are respectively provided with a pair of first cavities and a pair of second cavities at opposite ends. The inner sidewalls of the pair of first cavities are connected with first J-shaped buckles (2010), and the interiors of the pair of second cavities are provided with second J-shaped buckles (2011). The adjacent first J-shaped buckles (2010) and second J-shaped buckles (2011) are engaged and connected.
5. A door and window handle according to claim 4, characterized in that, A connecting block (2012) is connected to the outer wall of each pair of second J-shaped buckles (2011). A sliding rod (2013) is connected to the opposite end of each of the two connecting blocks (2012). The opposite ends of the two sliding rods (2013) extend through the handle body (2009) to the outside. A second spring (2014) is sleeved on the outside of each of the two sliding rods (2013). The two ends of the second spring (2014) are respectively connected to the inner wall of the second cavity and the outer wall of the connecting block (2012).
6. A door and window handle according to claim 5, characterized in that, The square shaft (1003) is fitted with a gear (1005). The fixed cover (1002) has slide bars connected to the inner walls on both sides of the gear (1005). One of the slide bars is slidably connected to a rack (1006). The front of the rack (1006) is connected to a shift fork (1007). The front of the mounting base (1001) is fitted with a decorative plate (1008). One end of the shift fork (1007) extends outward through the decorative plate (1008).
7. A door and window handle according to claim 6, characterized in that, The inner wall of the mounting base (1001) is connected to a pair of positioning posts (1009) near the upper and lower ends of the fixing cover (1002). The front of the two pairs of positioning posts (1009) is in contact with the back of the decorative panel (1008). The outer side of the mounting base (1001) near the positioning posts (1009) is provided with a first threaded hole. The decorative panel (1008) is provided with a second threaded hole near the positioning posts (1009). Bolts are connected between the first threaded hole, the positioning post (1009) and the second threaded hole.
8. A door and window handle according to claim 7, characterized in that, The mounting base (1001) has a cover plate (1010) on its back side. The front side of the cover plate (1010) is in contact with the back side of the mounting base (1001). A circular hole is provided in the center of the cover plate (1010). One end of the fixing base (2001) extends through the circular hole to the outside. The outer wall of the fixing base (2001) is connected to the inner wall of the circular hole by a bearing.