A falling-prevention locking structure of a door and window

Abstract

The novel door and window anti-falling locking structure comprises a handle body, movable locking blocks and fixed locking blocks. The fixed locking blocks are two in number. The movable locking blocks have sliding plates and locking blocks. The locking blocks are two in number. The two locking blocks are fixed on the sliding plates. The handle body has a shell and a handle. A rotating block is arranged in the shell. The outer side wall of the rotating block is provided with a plurality of first meshing teeth and four positioning recesses. A reset positioning bead structure is arranged in the shell. A moving plate is arranged on the left side or the right side of the rotating block in the shell. A plurality of second meshing teeth are arranged on the side of the moving plate facing the teeth. The two second meshing teeth form a meshing groove. The number of the meshing grooves is 2N+1. A limiting structure is arranged in the shell. The rear end of the moving plate is connected with a sliding block. One of the two fixed locking blocks is between the two locking blocks. The other fixed locking block is below the lower locking block. Compared with the prior art, the door and window anti-falling locking structure can avoid deformation and falling, has a longer service life, and is not easy to collide when the handle is used.

Description

Technical Field

[0001] This utility model relates to the field of door and window technology, and in particular to a door and window anti-fall locking structure. Background Technology

[0002] Most existing doors and windows are locked and opened using a locking structure. This locking structure includes a handle body, a fixed locking block 101, and a movable locking block. The door or window has a rectangular inner window frame containing a glass layer. An opening is formed in the wall, and an outer window frame is located within this opening. The outer window frame is a hollow rectangular structure extending from front to back. The inner window frame is vertically embedded within the outer window frame, and the inner and outer window frames are hinged together on their left inner sidewalls. The right inner sidewall of the outer window frame has a first sliding rail extending vertically. Two fixed locking blocks 101 are provided, spaced vertically within the first sliding rail. Each fixed locking block 101 has a recessed fixing groove on its bottom surface. A second sliding rail, opposite the first sliding rail, is located on the right side of the inner window frame. A sliding block is vertically mounted within the second sliding rail. The right side of the sliding plate 102 has two locking blocks 103 protruding from it, which are located below the two fixed locking blocks 101 and can move upward to engage with the fixed grooves. The sliding plate 102 and the two locking blocks 103 constitute the aforementioned movable locking block. A handle body is installed on the right side of the front side of the door and window to control the upward movement of the sliding plate 102 so that the two locking blocks 103 are respectively confined in the two fixed grooves. The handle body has a housing and a handle. The housing is installed on the right side of the front side of the inner window frame. The sliding plate 102 is located inside the right side of the inner window frame. The two locking blocks 103 are fixed on the sliding plate 103 and spaced vertically. The handle is rotatably installed on the front side of the housing in a 360-degree rotation manner. The handle is engaged with the sliding plate by rotating the sliding plate up and down through a rotation switching mechanism. When in use, rotating the handle body causes the sliding plate 102 to move upward, thereby causing the locking block 103 to move upward into the fixed groove, thus locking the door and window. Reversely rotating the handle body causes the sliding plate 102 to move downward, thereby causing the locking block 103 to move downward and disengage from the fixed locking block, thus opening the door and window.

[0003] In the aforementioned door and window locking structure, during use, the locking block 103 on the right end of the inner window frame is located below the fixed locking block 101. However, both the door and window and the inner window frame have their own weight. The locking block 103 has a downward force that pushes it out of the fixed groove. The door, window, inner window frame, and fixed locking block all have a downward vertical force, making the force of the entire door and window downward. Therefore, after long-term use, the door and window are prone to falling, causing deformation and displacement of the door and window, thus creating a safety hazard of falling. For safety reasons, anti-fall blocks are installed at the four corners of the inner and outer window frames. Although these anti-fall blocks can solve the problem that the door and window cannot fall out of the door and window opening after falling, they still cannot solve the problem of the door and window falling. Furthermore, when the handle rotates 360 degrees, it is easy for the handle to rotate more than 180 degrees when it turns from 90 degrees to 180 degrees, making it easy for the handle to collide with the inner or outer window frame.

[0004] In view of this, the inventors of this case conducted in-depth research on the problem, which led to the creation of this case. Utility Model Content

[0005] The purpose of this utility model is to provide a fall-prevention locking structure for doors and windows, so as to solve the problems that existing doors and windows are prone to deformation and falling after long-term use, and that handles are prone to collision with the inner or outer window frames.

[0006] To achieve its purpose, this utility model adopts the following technical solution:

[0007] A door / window anti-fall locking structure includes a handle body, a movable locking block, and fixed locking blocks. Two fixed locking blocks are provided, arranged vertically at intervals. The movable locking block has a sliding plate and a locking block. The sliding plate is vertically positioned, and two locking blocks are fixed to the sliding plate at intervals. Each locking block corresponds to and is locked to one of the two fixed locking blocks. The handle body has a housing and a handle. The handle is rotatably mounted on one side of the housing, moving the sliding plate up and down. The side of the housing containing the handle is the front side. A circumferentially rotatable rotating block is provided inside the housing and is locked to the handle. The rear outer wall of the rotating block has several circumferentially spaced first engaging teeth, and the front outer wall of the rotating block has four evenly spaced positioning recesses. The housing contains corresponding upper and lower locking blocks. The two positioning recesses of the position are equipped with a reset positioning bead structure that can be elastically reset up and down. The housing is provided with a movable plate that can move up and down on the left or right side of the rotating block. The side of the movable plate facing the first engaging tooth is provided with several second engaging teeth that can engage with the first engaging tooth. The second engaging teeth are arranged vertically at intervals. Between two second engaging teeth, an engaging groove is formed that engages with the first engaging tooth. The number of engaging grooves is 2N+1, and N is a positive integer. When the handle is in a straight state, one of the first engaging teeth on the rotating block is always engaged with the middle engaging groove of all the engaging grooves. The housing is provided with a limiting structure that limits the movement range of the movable plate. The rear end of the movable plate is connected to the sliding plate mentioned above. One of the two fixed locking blocks is located between the two locking blocks, and the other fixed locking block is located below the lower locking block of the two locking blocks.

[0008] The housing has a mounting shell and a cover plate. Both the mounting shell and the handle are vertically arranged. The mounting shell has a mounting groove with a rear-open, strip-shaped structure. The mounting groove extends in the vertical direction. The bottom center of the mounting groove has a forward-recessed protrusion that leads to the front side of the mounting shell. The rotating block is located in the mounting groove, and the front side of the rotating block protrudes forward, extending out of the protrusion and locking together with the rear end of the handle. The cover plate is locked together with the housing and blocks the rear-opening of the mounting groove. The cover plate has a strip-shaped opening that runs through the front and back direction and extends in the vertical direction. The rear end of the moving plate extends out of the strip-shaped opening, and the front end of the moving plate engages with the first meshing tooth on the rotating block.

[0009] The rotating block has an integrally formed front connecting part and a rear engaging part. The front connecting part has a protruding locking block on its front side. The front connecting part is a circular block with four positioning recesses evenly distributed around its outer side wall. The rear engaging part is a toothed block with several first engaging teeth evenly spaced around its outer side wall. The second engaging teeth are located on the left or right side of the toothed block. There are two reset positioning bead structures, which are spaced vertically. The front connecting part is located between the two reset positioning bead structures.

[0010] Both of the aforementioned reset positioning bead structures have a mounting box, an elastic element, and a positioning bead. Both mounting boxes are installed in the mounting groove and are respectively located above and below the rotating block. The mounting box has a recessed strip-shaped groove extending in the vertical direction on the side facing the rotating block. One end of the elastic element is connected to the bottom of the strip-shaped groove, and the other end of the elastic element is connected to the positioning bead. The positioning bead is located in the strip-shaped groove, and the part of the positioning bead facing the rotating block extends out of the strip-shaped groove and falls into the two opposite positioning recesses one by one.

[0011] The movable plate has an integrally formed meshing part, connecting part, and moving part. The connecting part is a plate structure extending in the vertical direction. The connecting part is stacked on the rear side of the rotating block and is located between the rear side of the rotating block and the front side of the cover plate. The meshing part is located on the left or right end of the front side of the connecting part. The meshing part is a strip-shaped block extending in the vertical direction. The upper and lower ends of the meshing part extend beyond the upper and lower ends of the connecting part. The meshing part has a second meshing tooth on the side facing the first meshing tooth that meshes with the first meshing tooth. The moving part extends in the front-back direction on the rear side of the connecting part and extends beyond the upper end of the strip-shaped opening.

[0012] The first meshing tooth has 8 teeth, and the meshing groove has 3, 5, 7 or 9 grooves.

[0013] The bottom of the mounting groove inside the housing is provided with two mounting seats. The mounting seats are strip-shaped structures extending in the vertical direction. The two mounting seats are spaced apart vertically, and the left and right outer side walls of the mounting seats are spaced apart from the left and right inner side walls of the mounting groove to form a limiting groove. The limiting groove is strip-shaped and extends in the vertical direction. The second meshing tooth is located within the end of one of the limiting grooves. The upper or lower end face of the moving plate is in contact with the upper or lower inner side wall of the limiting groove. The rotating block is located between the two mounting seats. The mounting seat has an indentation groove on the side facing the rotating block for the mounting box to be embedded in. The limiting groove is the aforementioned limiting structure.

[0014] The locking block is a circular cylindrical structure extending in the left-right direction. The outer wall of the circular cylinder is recessed with a limiting groove in a closed ring structure. The fixing block is a strip-shaped block extending in the up-down direction. The fixing block has a hollow structure. The top surface of the fixing block is recessed with an arc-shaped groove that extends to one side of the fixing block and allows the locking block to be confined within it. The inner wall of the lower end of the limiting groove matches the inner wall of the arc-shaped groove.

[0015] The arc-shaped groove has a lower limit part and an upper moving part above the lower limit part. The lower limit part is a concave arc groove that is concave downwards. The inner diameter of the concave arc groove matches the inner diameter of the arc-shaped groove. The upper moving part is a strip-shaped through groove that runs vertically and extends in the vertical direction. The inner diameter of the strip-shaped through groove in the front-back direction matches the inner diameter of the arc-shaped groove.

[0016] This novel anti-fall locking structure for doors and windows, when applied as an example with the door and window opening to the left and forward, involves installing the handle body on the front right end of the inner window frame, with the handle vertically positioned. The rear end of the handle body is connected to the sliding plate, thus connecting the handle body. With the handle vertically facing downwards, rotating it 90 degrees clockwise to the left until it is perpendicular to the housing causes the engaging part to move downwards, thereby moving the locking block downwards into the upper part of the fixed locking block, thus locking the door and window. Conversely, rotating the handle in the opposite direction returns it to its original 180-degree position. The door and window can be opened in a 90-degree direction. Thanks to the limiting structure, the handle is less likely to collide with the inner or outer window frame when turning from 90 degrees to 180 degrees. Compared to existing technologies, when the door and window are closed, the locking block is positioned within the upper part of the fixed locking block. Supported by the fixed locking block, it significantly distributes the weight of the door and window on the right side. The fixed locking block provides upward support, reducing the weight of the door and window, decreasing the load on the door and window itself, and lowering the possibility of deformation and sagging. This is especially beneficial in enlarged and heavy-duty doors and windows, as it disperses the downward force, preventing deformation and sagging, ensuring airtightness during use, preventing heat loss, and providing better insulation and windproofing, thus achieving energy-saving insulation functions. It also distributes force to the hinges, reducing the load on these areas, decreasing the likelihood of damage and replacement, and significantly increasing the lifespan of the doors and windows. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the background structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the locking block of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the fixing lock block of this utility model.

[0021] Figure 5 This is a schematic diagram of the handle body of this utility model.

[0022] Figure 6 This is a schematic diagram of the structure of the handle body of this utility model, omitting the rear cover plate.

[0023] Figure 7 This is a schematic diagram of the handle body of this utility model, omitting the rear cover plate and the movable plate.

[0024] Figure 8 This is a schematic diagram of the structure of the movable plate of this utility model.

[0025] Figure 9 This is a schematic diagram of the structure of the rear cover plate of this utility model. Detailed Implementation

[0026] To further explain the technical solution of this utility model, a detailed description is provided below in conjunction with the accompanying drawings.

[0027] A type of anti-fall locking structure for doors and windows, such as Figures 2-9 As shown, it includes a handle body, a movable locking block 1, and a fixed locking block 2. There are two fixed locking blocks 2, which are arranged vertically at intervals. The movable locking block 1 has a sliding plate 11 and a locking block 12. The sliding plate 11 is vertically installed on the side of the inner window frame facing the fixed locking block. The installation method of the sliding plate 11 is a well-known technique to those skilled in the art and will not be described in detail here. There are two locking blocks 12, which are fixed vertically at intervals on the sliding plate 11. The two locking blocks 12 are respectively matched with the two fixed locking blocks 2 for limiting and locking. The handle body has a housing 3 and a handle 4. The handle 4 is rotatably installed on one side of the housing 3 in order to drive the sliding plate 11 to move up and down. The side of the housing 3 where the handle 4 is located is the front side.

[0028] The housing 3 contains a rotating block 5 that can rotate circumferentially, and the rotating block 5 is locked together with the handle 4. Specifically, the housing 3 has a mounting shell 31 and a cover plate 32. Both the mounting shell 31 and the handle 4 are vertically arranged. The mounting shell 31 has a mounting groove with an open rear side and a strip-shaped structure. The mounting groove extends in the vertical direction. The bottom of the mounting groove is recessed forward at the center, with an extension opening leading to the front side of the mounting shell 31. The rotating block 5 is located in the mounting groove, and the front side of the rotating block 5 protrudes forward, extending out of the extension opening and locking together with the rear end of the handle 4 (not shown in the figure). That is, the handle 4 has a fixing part 41 and a holding part 42. The holding part 42 is vertically arranged, and the rear side of the holding part 42 is recessed. The device has several anti-slip grooves spaced apart in the vertical direction (not shown in the figure). The fixing part 41 is located on the upper rear side of the handle part 42 in the front-back direction. The locking block extends forward into the rear end of the fixing part 41 and is locked together with the fixing part 41. That is, the rear side of the rotating block 5 has a locking countersunk hole that leads to the front side of the locking block. The rear side of the fixing part 41 has a locking groove corresponding to the position of the locking countersunk hole. The rotating block 5 is locked together with the fixing part 41 by a fixing bolt through the locking countersunk hole into the locking groove. The cover plate 32 of the fixing part 41 is locked together with the housing 3 and seals the rear opening of the mounting groove. The cover plate 32 has a strip-shaped opening 100 that runs through in the front-back direction and extends in the vertical direction. In use, the handle 4 is rotated, and the handle 4 drives the rotating block 5 in the mounting groove to rotate.

[0029] The rear outer wall of the rotating block 5 has several circumferentially spaced first meshing teeth, and the front outer wall of the rotating block 5 has four evenly spaced positioning recesses 200. Inside the housing 3, corresponding to the two upper and lower aligned positioning recesses 200, there are reset positioning bead structures capable of elastically resetting vertically. Specifically, the rotating block 5 has an integrally formed front connecting part 51 and a rear meshing part 52. The front side of the front connecting part 51 protrudes with the aforementioned locking block. The front connecting part 51 is a circular block, and the four positioning recesses 200 are evenly distributed circumferentially around its outer wall. The rear meshing part 52 is a toothed block, and the outer wall of the toothed block has several circumferentially spaced first meshing teeth. Two reset positioning bead structures are provided, spaced vertically. The front connecting part 51 is located between the two reset positioning bead structures. That is, both reset positioning bead structures have a mounting box 61, an elastic element, and a positioning bead 62. The two mounting boxes 61 are installed in the mounting groove and are respectively located above and below the rotating block 5. The mounting box 61 has a strip-shaped groove extending in the vertical direction on the side facing the rotating block 5. The elastic element is a compression spring (not shown in the figure). The elastic element extends in the vertical direction. The opposite ends of the two elastic elements are connected to the bottom of the strip-shaped groove. The opposite ends of the two elastic elements are connected to the positioning bead 62. The positioning bead 62 is located in the strip-shaped groove, and the part of the positioning bead 62 facing the rotating block 5 extends out of the strip-shaped groove and falls into the two opposite positioning recesses one by one. That is, the four positioning recesses 200 are divided into upper positioning recess, lower positioning recess, left positioning recess, and right positioning recess. When the handle is set vertically, the two positioning beads 62 fall into the upper and lower positioning recesses respectively. At this time, the elastic element is released. When the handle is rotated, the rotating block rotates. Before the positioning beads enter the positioning recesses 200, the elastic element is compressed. Continue to rotate the handle. When the handle rotates 90 degrees, the positioning beads fall into the other two opposite positioning recesses. That is, when the positioning beads fall into the positioning recesses, the handle and the housing are both in a vertical state or the handle and the housing are in a perpendicular state.

[0030] Inside the housing 3, a movable plate 7 is located on the left or right side of the rotating block 5, capable of vertical movement. The side of the movable plate 7 facing the first engaging tooth has several second engaging teeth that can mesh with the first engaging tooth. These second engaging teeth are arranged vertically at intervals, and a meshing groove is formed between two second engaging teeth to mesh with the first engaging tooth. The number of meshing grooves is 2N+1, where N is a positive integer. When the handle 4 is in a straight position (when the handle 4 is perpendicular to the housing 3), one of the first engaging teeth on the rotating block 5 always meshes with the middle meshing groove. The rear end of the movable plate 7 extends beyond the strip-shaped opening 100, and the front end of the movable plate 7 meshes with the first engaging tooth on the rotating block 5. The upper or lower end face of the movable plate 7 is in contact with the upper or lower inner wall of the housing. Specifically, the second engaging teeth are located on the left or right side of the tooth block, and the movable plate 7 has… The device comprises an integrally formed meshing part 71, a connecting part 72, and a moving part 73. The connecting part 72 is a plate structure extending in the vertical direction. The connecting part 72 is stacked on the rear side of the rotating block 5 and is located between the rear side of the rotating block 5 and the front side of the cover plate 32. The meshing part 71 is located on the left or right end of the front side of the connecting part 72. The meshing part 71 is a strip-shaped block extending in the vertical direction. The upper and lower ends of the meshing part 71 extend beyond the upper and lower ends of the connecting part 72. The meshing part 71 has a second meshing tooth 711 on the side facing the first meshing tooth, which meshes with the first meshing tooth. The moving part 73 extends in the front-back direction on the rear side of the connecting part 72 and extends beyond the upper end of the strip-shaped opening 100. The meshing groove has 3, 5, 7, or 9 grooves. The first meshing tooth has 8 grooves. Preferably, the meshing groove has 7 grooves and the second meshing tooth 711 has 6 grooves.

[0031] The housing 3 is provided with a limiting structure for the movement range of the moving plate 7; specifically, two mounting seats 8 are protruding from the bottom of the mounting groove inside the housing 3. The mounting seats 8 are strip-shaped structures extending in the vertical direction. The two mounting seats 8 are spaced apart vertically, and the left and right outer walls of the mounting seats 8 are spaced apart from the left and right inner walls of the mounting groove to form a limiting groove. The limiting groove is strip-shaped and extends in the vertical direction. The second meshing tooth 711 is located within the end of one of the limiting groove ranges. The rotating block 5 is located between the two mounting seats 8. The limiting groove is the aforementioned limiting structure, that is, the two mounting seats 8 are divided into an upper mounting seat and a lower mounting seat. The space between the left side of the upper mounting seat and the left inner wall of the housing is... The space between the right side of the upper mounting base and the right inner wall of the housing forms a right upper limit groove. The space between the left side of the lower mounting base and the left inner wall of the housing forms a left lower limit groove. The space between the right side of the lower mounting base and the right inner wall of the housing forms a right lower limit groove. The mounting base 8 has a recessed mounting groove on the side facing the rotating block 5 for the mounting box 61 to be embedded in. The two mounting bases 8 and the rotating block are spaced apart and form an arc-shaped gap. The mounting box 61 has an arc-shaped strip 611 protruding from the end facing the rotating block 5 and embedded in the arc-shaped gap. The arc-shaped strip 611 has a recessed groove on the side facing the rotating block 5 that communicates with the strip groove. The positioning bead 62 is partially located in the groove. In application, when the door / window opens to the left and forward, the second meshing tooth 711 is located outside the upper right side of the tooth block, facing left. The top surface of the meshing part 71 is in contact with the inner top surface of the housing. At this time, the meshing part is above the lower right limiting groove, and the handle is vertically downward. Under the action of the limiting groove, the handle cannot rotate 90 degrees counterclockwise to the right. When the handle rotates 90 degrees clockwise to the left, the rotating block rotates clockwise. The moving plate 7 moves downward under the meshing transmission of the first and second meshing teeth. When the handle moves to the vertically upward position, the meshing part is below the upper right limiting groove. At this time, the handle also cannot rotate 90 degrees clockwise to the right. When the door / window opens to the right, the second meshing tooth is located outside the upper left end of the tooth block, facing right. The top surface of the meshing part 71 is in contact with the inner top surface of the housing. At this time, the meshing part 71 is above the lower left limit recess, and the handle is vertically downward. Under the action of the limit groove, the handle cannot rotate 90 degrees clockwise to the left. When the handle rotates 90 degrees counterclockwise to the right, the rotating block rotates counterclockwise. The moving plate 7 moves downward under the meshing transmission of the first and second meshing teeth. When the handle moves to the vertical position, the meshing part 71 is below the upper left limit recess. At this time, under the action of the limit groove, the handle cannot rotate 90 degrees clockwise to the left. When the door / window opens to the left front, there is a large space on the left front side of the door / window for the handle to move. By turning the handle to the left, the moving plate 7 moves downward, and the handle cannot rotate 90 degrees to the right. This ensures that the handle body will not exceed the range of the door / window during use, avoiding collisions between the handle and the inner or outer window frame.Similarly, when the door or window opens to the right front, there is plenty of space on the right front side of the door or window for the handle to move, and the movement of the handle will not collide with the inner or outer window frame.

[0032] The rear end of the movable plate 7 is connected to the sliding plate 11, and one of the two fixed locking blocks 2 is located between the two locking blocks 12, while the other fixed locking block 2 is located below the lower locking block 12. Specifically, a locking box protrudes from one side of the sliding plate 11, and the locking box is located between the two locking blocks 12. The locking box has a fixing hole that extends through the front and rear directions. The movable part 73 of the movable plate 7 is embedded rearward into the fixing hole. The shell, cover plate, and inner window frame are locked together. The method of locking the handle body, inner window frame, and sliding plate 11 together is a well-known technique to those skilled in the art and will not be described in detail here. The locking block 12 is a circular cylindrical structure extending in the left and right directions. The outer wall of the circular cylindrical structure is recessed with a limiting groove in a closed ring structure. The fixed locking block 2 is a strip-shaped block extending in the up and down directions. The fixed locking block 2 is a strip-shaped block in the middle. The structure is hollow. The top surface of the fixed locking block 2 is recessed with an arc-shaped groove 300 that extends to the side of the fixed locking block 2 facing the locking block and limits the locking block 12 within it. The inner wall of the lower end of the limiting groove matches the inner wall of the arc-shaped groove. That is, the arc-shaped groove 300 has a lower limiting part 301 and an upper moving part 302 above the lower limiting part 301. The lower limiting part 301 is a downwardly concave arc groove, and the inner diameter of the concave arc groove matches the inner diameter of the arc-shaped groove. The upper moving part 302 is a strip-shaped through groove extending vertically, and the inner diameter of the strip-shaped through groove in the front-back direction matches the inner diameter of the arc-shaped groove. In application, the handle controls the locking block 3 to move above the fixed locking block 2, and the handle controls the locking block 12 to enter the concave arc groove from the strip-shaped through groove. At this time, the locking block 12 is limited within the concave arc groove, realizing the locking of the door and window.

[0033] This novel anti-fall locking structure for doors and windows, when applied as an example of a door or window opening to the left and forward, involves installing the handle body on the front right end of the inner window frame, with the handle vertically positioned. The rear end of the handle body is connected to the sliding plate, thus connecting the handle body. With the handle vertically facing downwards, rotating it 90 degrees clockwise to the left until it is perpendicular to the housing causes the engaging part to move downwards, thereby moving the locking block 12 downwards into the arc-shaped groove 300, thus locking the door and window. Conversely, rotating the handle in the opposite direction returns it to its original 180-degree position. The vertical installation allows for easy opening of doors and windows. With the limiting structure in place, the handle is less likely to collide with the inner or outer window frame when turning from 90 degrees to 180 degrees. Compared to existing technologies, when the door or window is closed, the locking block engages with the upper part of the fixed locking block. Supported by the fixed locking block, it significantly distributes the weight of the door or window on the right side. The fixed locking block provides upward support, reducing the weight of the door or window and decreasing its load, thus lowering the possibility of sagging or deformation. This is particularly effective in enlarged and heavy-duty doors and windows, as it decomposes the downward force, preventing deformation and sagging, ensuring a tight seal, preventing heat loss, and providing better insulation and windproofing, ultimately achieving energy-saving and heat-insulating functions. It also distributes the force to the hinges of doors and windows, reducing the load on the hinges, decreasing the possibility of damage to the hinges, reducing the need for repairs, and greatly increasing the service life of doors and windows.

[0034] In this invention, preferably, the mounting groove of the housing is provided with two locking seats 9, which are spaced vertically apart. Two mounting seats 8 are located between the two locking seats 9. Each locking seat 9 has a locking post 91, a positioning post 92, and a connecting piece. The connecting piece has a horizontal plate 93 and a vertical plate 94. The horizontal plate 93 extends in the left-right direction, and its left and right ends are respectively connected to the left and right inner sidewalls of the mounting groove. The two horizontal plates 93 are respectively spaced apart from the upper and lower inner sidewalls of the housing, and the vertical plates 94 are connected between the two horizontal plates 93 and the upper and lower inner sidewalls of the housing. The upper or lower end face of the engaging part 71 is connected to the vertical plate 94. 4. The locking pins 91 and 92 are attached to the side facing the rotating block. They extend in the front-back direction and are spaced apart on the left and right. The locking pins 91 and 92 are connected to both horizontal plates 93. The rear side of the locking pins 91 and 92 are recessed with strip-shaped notches 400 extending in the front-back direction. The strip-shaped notches 400 of the locking pin 91 are provided with internal threads. The rear cover plate 32 is a strip-shaped plate structure extending in the vertical direction. The rear cover plate 32 is recessed with through openings in the front-back direction at the positions corresponding to the four strip-shaped notches 400. The inner sidewalls of two of the through openings are provided with positioning pieces 321 that extend into the strip-shaped notches 400 of the positioning pins 92. When applying, install the rotating block, determine the contact position of the end face of the meshing part 71 according to the opening direction of the door and window, and then position the rear cover plate 32 on the rear opening of the housing through the strip notch 400 on the positioning piece 321 and the positioning post 92 to facilitate the installation of the rear cover plate 32. Then attach the rear side of the housing to the front side of the inner window frame, and insert the moving part 73 of the moving plate 7 into the fixing hole. Then use the fixing bolts to lock the inner window frame and the locking post together to realize the connection of the handle body, the inner window frame and the sliding plate.

[0035] The product form of this utility model is not limited to the illustrations and embodiments in this case. Any appropriate changes or modifications made to it based on similar ideas should be considered as not departing from the patent scope of this utility model.

Claims

1. A fall-prevention locking structure for doors and windows, comprising a handle body, a movable locking block, and a fixed locking block, wherein two fixed locking blocks are provided, arranged vertically at intervals; the movable locking block has a sliding plate and a locking block, the sliding plate is vertically arranged, and two locking blocks are fixed vertically at intervals on the sliding plate, the two locking blocks respectively corresponding to and lockingly engaging with the two fixed locking blocks; the handle body has a housing and a handle, the handle being rotatably mounted on one side of the housing by driving the sliding plate to move up and down, with the side of the housing containing the handle being the front side; characterized in that: The housing contains a circumferentially rotatable rotating block, which is locked to the handle. The rear outer wall of the rotating block has several circumferentially spaced first meshing teeth, and the front outer wall has four evenly spaced positioning recesses. Inside the housing, corresponding to the two vertically aligned positioning recesses, are installed reset positioning beads that can elastically return to their original position. Inside the housing, on the left or right side of the rotating block, is a vertically movable plate. The side of the movable plate facing the first meshing teeth has several second meshing teeth that can engage with them. The teeth are arranged with the second meshing teeth spaced apart vertically. A meshing groove is formed between two second meshing teeth to mesh with the first meshing teeth. The number of meshing grooves is 2N+1, and N is a positive integer. When the handle is in a straight position, one of the first meshing teeth on the rotating block is always meshed with the middle meshing groove. The housing is provided with a limiting structure for the movement range of the limiting moving plate. The rear end of the moving plate is connected to the sliding plate. One of the two fixed locking blocks is located between the two locking blocks, and the other fixed locking block is located below the lower locking block of the two locking blocks.

2. The anti-fall locking structure for doors and windows according to claim 1, characterized in that: The housing has a mounting shell and a cover plate. Both the mounting shell and the handle are vertically arranged. The mounting shell has a mounting groove with a rear-open, strip-shaped structure. The mounting groove extends in the vertical direction. The bottom center of the mounting groove has a forward-recessed protrusion that leads to the front side of the mounting shell. The rotating block is located in the mounting groove, and the front side of the rotating block protrudes forward, extending out of the protrusion and locking together with the rear end of the handle. The cover plate is locked together with the housing and blocks the rear-opening of the mounting groove. The cover plate has a strip-shaped opening that runs through the front and back direction and extends in the vertical direction. The rear end of the moving plate extends out of the strip-shaped opening, and the front end of the moving plate engages with the first meshing tooth on the rotating block.

3. The anti-fall locking structure for doors and windows according to claim 2, characterized in that: The rotating block has an integrally formed front connecting part and a rear engaging part. The front connecting part has a protruding locking block on its front side. The front connecting part is a circular block with four positioning recesses evenly distributed around its outer side wall. The rear engaging part is a toothed block with several first engaging teeth evenly spaced around its outer side wall. The second engaging teeth are located on the left or right side of the toothed block. There are two reset positioning bead structures, which are spaced vertically. The front connecting part is located between the two reset positioning bead structures.

4. The anti-fall locking structure for doors and windows according to claim 3, characterized in that: Both of the aforementioned reset positioning bead structures have a mounting box, an elastic element, and a positioning bead. Both mounting boxes are installed in the mounting groove and are respectively located above and below the rotating block. The mounting box has a recessed strip-shaped groove extending in the vertical direction on the side facing the rotating block. One end of the elastic element is connected to the bottom of the strip-shaped groove, and the other end of the elastic element is connected to the positioning bead. The positioning bead is located in the strip-shaped groove, and the part of the positioning bead facing the rotating block extends out of the strip-shaped groove and falls into the two opposite positioning recesses one by one.

5. The anti-fall locking structure for doors and windows according to claim 3, characterized in that: The movable plate has an integrally formed meshing part, connecting part, and moving part. The connecting part is a plate structure extending in the vertical direction. The connecting part is stacked on the rear side of the rotating block and is located between the rear side of the rotating block and the front side of the cover plate. The meshing part is located on the left or right end of the front side of the connecting part. The meshing part is a strip-shaped block extending in the vertical direction. The upper and lower ends of the meshing part extend beyond the upper and lower ends of the connecting part. The meshing part has a second meshing tooth on the side facing the first meshing tooth that meshes with the first meshing tooth. The moving part extends in the front-back direction on the rear side of the connecting part and extends beyond the upper end of the strip-shaped opening.

6. The anti-fall locking structure for doors and windows according to claim 5, characterized in that: The first meshing tooth has 8 teeth, and the meshing groove has 3, 5, 7 or 9 grooves.

7. The anti-fall locking structure for doors and windows according to claim 4, characterized in that: The bottom of the mounting groove inside the housing is provided with two mounting seats. The mounting seats are strip-shaped structures extending in the vertical direction. The two mounting seats are spaced apart vertically, and the left and right outer side walls of the mounting seats are spaced apart from the left and right inner side walls of the mounting groove to form a limiting groove. The limiting groove is strip-shaped and extends in the vertical direction. The second meshing tooth is located within the end of one of the limiting grooves. The upper or lower end face of the moving plate is in contact with the upper or lower inner side wall of the limiting groove. The rotating block is located between the two mounting seats. The mounting seat has an indentation groove on the side facing the rotating block for the mounting box to be embedded in. The limiting groove is the aforementioned limiting structure.

8. The anti-fall locking structure for doors and windows according to claim 2, characterized in that: The locking block is a circular cylindrical structure extending in the left-right direction. The outer wall of the circular cylinder is recessed with a limiting groove in a closed ring structure. The fixing block is a strip-shaped block extending in the up-down direction. The fixing block has a hollow structure. The top surface of the fixing block is recessed with an arc-shaped groove that extends to one side of the fixing block and allows the locking block to be confined within it. The inner wall of the lower end of the limiting groove matches the inner wall of the arc-shaped groove.

9. The anti-fall locking structure for doors and windows according to claim 8, characterized in that: The arc-shaped groove has a lower limit part and an upper moving part above the lower limit part. The lower limit part is a concave arc groove that is concave downwards. The inner diameter of the concave arc groove matches the inner diameter of the arc-shaped groove. The upper moving part is a strip-shaped through groove that runs vertically and extends in the vertical direction. The inner diameter of the strip-shaped through groove in the front-back direction matches the inner diameter of the arc-shaped groove.

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