A locking device for self-holding a door open at an angle

Abstract

A door and window locking mechanism for locking the opening degree of a door and window, comprising a guide rail and a connecting rod, one of which is connected with the door and window frame and the other of which is connected with the door and window leaf, a sliding block being slidable in the guide rail, the connecting rod being connected with the guide rail through the sliding block, the door and window leaf driving the sliding block to slide in the guide rail when the door and window is opened or closed, further comprising a locking member, the locking member being slidable up and down in the guide rail, one end of the locking member being provided with a first elastic member, the sliding block and the locking member being correspondingly provided with a locking position and a locking protrusion matched with each other, the sliding block pressing the locking member to move and pushing the first elastic member when the door and window is opened and the sliding block is slid to the position of the locking member, the locking member and the sliding block being locked in position through the cooperation of the locking position and the locking protrusion to keep the opening degree of the door and window.

Description

Technical Field

[0001] This invention relates to the field of home decoration equipment, and more particularly to a locking device that automatically maintains the opening angle of a door. Background Technology

[0002] A door closer is a spring-like hydraulic device installed on the top of a door. When the door is opened, it can be compressed and then released to automatically close the door. Its function is similar to that of a spring door, ensuring that the door can be accurately and promptly closed to its initial position after being opened.

[0003] Invention patent CN105971442B discloses an electric door closer for fire doors, comprising a slide rail, a support arm, a slider, a first bracket, a solenoid valve, a reset rod, a locking plate, and a locking shaft. The reset rod has a groove on its side near the locking plate. One end of the reset rod is hinged to the bottom wall of the first bracket. The actuating end of the solenoid valve is connected to the other end of the reset rod. One end of the locking plate can be embedded in the groove of the reset rod, and a first compression spring is installed between this end of the locking plate and the bottom wall of the first bracket. The other end of the locking plate is equipped with a pressure rod that drives the locking shaft to be embedded in the arc-shaped groove of the slider. When the solenoid valve is energized, the core-pulling end of the solenoid valve retracts, causing the reset rod to flip. The locking plate disengages from the groove and flips counterclockwise. The locking shaft moves towards the bottom wall of the slide rail and slides out of the arc-shaped groove. The slider slides along the track on the slide rail. Its locking structure is similar to a seesaw structure, with a locking pin at one end. Whether locking or unlocking, the force is applied to the locking end. However, it has problems such as difficulty in locking, requiring a large force, and easy damage to the hinge pin and elastic components after long-term use.

[0004] Therefore, a more rationally designed device is needed to maintain the door's opening angle. In view of this, the inventors, in order to achieve the above objective, have devoted themselves to research and applied theoretical principles, and have finally proposed a technical solution that is rationally designed and effectively improves upon the aforementioned deficiencies. Summary of the Invention

[0005] This invention provides a door and window locking mechanism for maintaining the opening degree of doors and windows. Furthermore, it can be used in conjunction with a door and window closer to not only maintain the opening degree but also achieve automatic closing. It includes a guide rail and a connecting rod, one connected to the door / window frame and the other to the door / window sash. The connecting rod is connected to the guide rail via a slider that slides on the guide rail. When the door / window opens or closes, the door / window sash drives the slider to slide within the guide rail via the connecting rod. It also includes a locking member that can slide up and down within the guide rail, and one end of the locking member is provided with a first elastic element. The slider and the locking member are respectively provided with cooperating locking positions and locking protrusions. One of the locking positions and the other of the locking protrusions is located on the locking member, and the other is located on the slider. Their positions can be interchanged. When the door or window is opened, the slider slides to the position of the locking member. The slider pushes the locking member and moves, and pushes the first elastic member, so that the locking member and the slider are locked in position through the cooperation of the locking position and the locking protrusion to maintain the opening of the door or window. When closing, the door or window drives the sliding block to push the first elastic member, so that the locking protrusion and the locking position are unlocked, thereby closing the door or window. The first elastic member is preferably located on the side closer to the slider, but it can also be located on the side farther from the slider. Of course, it is also feasible for the first elastic member to be located in the middle and the locking member to slide on one side. This can be regarded as an equivalent technical solution of the specific embodiment of the present invention. When locking and unlocking, the locking member can not only slide up and down, but also allow one side of the first elastic member to rotate to a certain extent. This makes it easier for the locking protrusion to slide into the locking position. Of course, this patent is not limited to this. Locking members that cannot rotate at one end should also be regarded as equivalent technology of this technical solution. Compared to existing technologies that use simple hinge plate rotation locking, the patented slider is easier to engage, requires less force, has a more reasonable stress distribution on the locking components, and has a longer service life.

[0006] Preferably, it further includes a resistance adjustment structure, which includes a second elastic element opposite to the first elastic element and a limiting element that restricts the movement of the locking element away from the slider. The first elastic element is located on the side closer to the slider, and the second elastic element is located on the side farther from the slider. When the door or window is opened, the end that first approaches the locking element when the slider slides is the approach side, and the other side is the side farther from the slider. The middle part of the locking element slides with the guide rail. The limiting element can restrict the up-and-down movement of the locking element on the second elastic element side. By limiting and releasing the limiting element, the magnitude of the resistance required to release the lock between the locking element and the slider can be adjusted. At this time, two closing methods can be provided. The first closing method is manual closing. The limiting element restricts the up-and-down movement of the locking element, and the slider presses the locking element up and down and presses the first elastic element. At this time, a large force needs to be overcome to close the door. The second closing method is that the limiting element releases the restriction on the locking element. At this time, the slider can press so that both sides of the locking element can slide up and down. At this time, only a small force of resistance needs to be overcome to release the lock. At this time, one side of the linkage can be connected to a conventional automatic door closing device, and the door closing device provides closing power as an automatic door closing procedure. The second elastic element can provide some resistance to release and provide the locking element with a reset force, preparing for the next stroke.

[0007] Preferably, the limiting member includes a swing member and a power member for driving the swing member to swing, and the swing of the swing member can limit or release the limitation on the locking member.

[0008] Preferably, the swing member is provided with a first limiting point and a second limiting point from bottom to top. When locked, the first limiting point limits the vertical movement of one side of the locking member. After the locking member moves upward and the slider and locking member are unlocked, the locking member resets downward under the elastic force of the first and second elastic members. At this time, the swing member can quickly return to its original position under the action of the power member. The locking member falls to the second limiting point to prevent the locking member and the slider from locking again. At this time, the door and window can be opened and closed freely. At this time, the locking mechanism is connected to the automatic door closing device, and the door can be closed automatically. In the fire-fighting state, even if it is opened manually, it can be closed automatically. When the power member is activated again, the locking member falls back to the first limiting point. At this time, the door and window can be opened and the locking member and the slider can be locked again.

[0009] Preferably, the locking element includes a push plate and a locking shaft. The guide rail has a sliding groove that mates with the locking shaft, and the slider has a locking position that mates with the locking shaft. In this case, the locking shaft serves as both a sliding shaft and a locking protrusion. The locking shaft and the push plate can be integrated or separate, or... The locking component includes a push plate with a locking protrusion, and the guide rail has a sliding groove that cooperates with the push plate.

[0010] Preferably, the push plate has an upwardly bent edge at one end of the first elastic member to restrict the downward rotation of the push plate.

[0011] Preferably, a first shaft is provided inside the first elastic element, and the position of the first shaft within the guide rail can be adjusted up and down to adjust the preset elastic force of the first elastic element. The first shaft can be adjusted up and down by a thread, and the position of the second elastic element can also be provided with an adjustable second shaft.

[0012] Preferably, the guide rail component is provided with a detachable mounting base, and the locking component and the first elastic component are fixed on the mounting base.

[0013] Preferably, the guide rail is provided with a groove, and the slider slides within the groove. The groove bends inward and forms a limiting protrusion, creating a first limiting edge and a second limiting edge that can limit the slider's position. The slider has a corresponding limiting groove. When the slider is subjected to lateral thrust, it can achieve bilateral force distribution, resulting in more uniform force distribution.

[0014] Preferably, a stabilizing plate is installed on one end of the push plate near the swing member, and a stabilizing groove matching the stabilizing plate is provided on the guide rail member, the stabilizing groove restricting the movement of the stabilizing plate in a direction perpendicular to the slider movement direction.

[0015] Existing technologies use a locking structure with a central hinge at one end, providing force only from one end. The door and window locking mechanism provided by this invention allows the locking element to slide up and down during locking and unlocking, while also allowing a certain degree of rotation on one side of the first elastic element. This makes it easier for the locking protrusion to slide into the locking position and creates a two-position force output structure, resulting in a more rational design and longer service life. Furthermore, with the addition of a limiting element and a second spring, it can achieve two modes of unlocking with varying resistance. Combined with an automatic door closing device, it provides both manual and automatic closing methods, enabling automatic door closing during fires. The structure is more rational and has a longer lifespan. The limiting element's design, after unlocking, also prevents unauthorized access and opening of the door after automatic fire-fighting closure, thus preventing the door from remaining locked and affecting fire safety. Attached Figure Description

[0016] The above and other objects, features, and advantages of the present invention will become clearer through a detailed description of the preferred embodiments illustrated in the accompanying drawings. The same reference numerals denote the same parts throughout the drawings, and the drawings are not intentionally scaled to actual size; the focus is on illustrating the gist of the invention.

[0017] Figure 1 This is a schematic diagram of the overall structure of a locking device that automatically maintains the opening angle of a door according to the present invention; Figure 2This is a side sectional view of the overall structure of a locking device that self-maintains the opening angle of a door according to the present invention; Figure 3 This is a side sectional view of a locking device for maintaining the opening angle of a door according to the present invention from another angle; Figure 4 This is a cross-sectional view of the locking device of the present invention, which is a locking device for maintaining the opening angle of a door, with a stabilizing plate installed on the push plate. Figure 5 This is a cross-sectional view of the overall structure of a locking device for maintaining the opening angle of a door according to the present invention; Figure 6 This is a cross-sectional view of the improved slider structure of the locking device for maintaining the door opening angle according to the present invention, in conjunction with the guide rail component; Figure 7 This is a schematic diagram of the independent specific structure of the locking component of a locking device for self-maintaining the opening angle of a door according to the present invention; Among them, 1: guide rail; 2: connecting rod; 3: slider; 4: mounting base; 5: first elastic element; 6: positioning point; 7: limiting point; 8: retaining shaft; 9: sliding groove; 10: fastening bolt; 11: adjusting bolt; 12: adjusting through hole; 13: swinging element; 14: power element; 15: limiting protrusion; 16: stabilizing plate; 17: pushing plate; 18: rod protrusion; 19: seat protrusion; 20: second elastic element; 21: inner bending protrusion; 22: first limiting edge; 23: second limiting edge; 24: locking element. Detailed Implementation

[0018] The present invention will now be further described in conjunction with the accompanying drawings and embodiments: The present invention will be further described below with reference to specific embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0019] It should be noted that when a component / part is referred to as being "set on" another component / part, it can be directly set on the other component / part or there may be an intervening component / part. When a component / part is referred to as being "connected / linked" to another component / part, it can be directly connected / linked to the other component / part or there may be an intervening component / part. The term "connected / linked" as used herein can include electrical and / or mechanical physical connections / links. The term "including / comprises" as used herein means the presence of a feature, step, or component / part, but does not exclude the presence or addition of one or more other features, steps, or components / parts. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. Furthermore, in the description of this application, the terms "first," "second," etc., are used for descriptive purposes and to distinguish similar objects only; there is no order between them, nor should they be construed as indicating or implying relative importance. Additionally, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0021] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0022] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0023] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0024] Implementation Case 1: As attached Figure 1-7 As shown, the present invention provides a door and window locking mechanism for maintaining the opening degree of doors and windows. Furthermore, it can be used in conjunction with a door and window closer to not only maintain the opening degree but also achieve automatic closing. It includes a guide rail 1 and a connecting rod 2, one of which is connected to the door and window frame and the other is connected to the door and window sash. The two can be interchanged without affecting the use effect.

[0025] The following description uses a guide rail 1 installed on a door or window frame, with a connecting rod connected to the door or window sash. The connecting rod 2 is connected to the guide rail 1 via a slider 3 that slides on the guide rail 1. When the door or window opens or closes, the door or window sash, via the connecting rod, drives the slider 3 to slide within the guide rail. The description also includes: A locking element 24 is provided, which can slide up and down within the guide rail. One end of the locking element 24 is provided with a first elastic element 5. The slider 3 and the locking element 24 are respectively provided with a locking position and a locking protrusion that cooperate with each other. One of the locking position and the locking protrusion is located on the locking element 24, and the other is located on the slider 3. They can be interchanged. When the door or window is opened, the slider 3 slides to the position of the locking element 24. The slider 3 pushes the locking element 24 to move and pushes the first elastic element 5, so that the locking element 24 and the slider 3 are locked in position through the cooperation of the locking position and the locking protrusion (after the locking protrusion slides to the locking position, it needs to overcome a large resistance to disengage from the locking protrusion again), so as to maintain the opening of the door or window. When closing (it can be closed manually or automatically in conjunction with an automatic door closing device), the door or window drives the slider block to push the first elastic element 5, so that the locking protrusion and the locking position are unlocked, thereby closing the door or window.

[0026] The first elastic element 5 is preferably located on the side closer to the slider 3, but it can also be located on the side farther away from the slider 3. Admittedly, the first elastic element 5 is located in the middle, and it is also feasible for the locking element 24 to slide on one side. This can be regarded as an equivalent technical solution in the specific embodiment of the present invention. When locking and unlocking, the locking element 24 can not only slide up and down, but also allow one side of the first elastic element 5 to rotate to a certain extent (rotating with the end away from the first elastic element as the axis of rotation and the end closer to the first elastic element as the end of rotation, so as to realize the locking protrusion entering / exiting the locking position). In this way, the locking protrusion can slide into the locking position more easily. Of course, this patent is not limited to this. The locking element 24 that cannot rotate on one end should also be regarded as an equivalent technology of this technical solution. Compared with the existing technology structure, the existing technology uses a locking structure with a middle hinge at one end, which only outputs force at one end. This structure not only allows the locking element 24 to slide up and down, but also allows a certain amount of swing, which can form two positions of force output. The structural design is more reasonable and the service life is longer.

[0027] In a preferred embodiment, the guide rail 1 is provided with a groove, and the slider 3 slides within the groove. The groove bends inward to form a limiting protrusion 15, forming a first limiting edge 22 and a second limiting edge 23 that can limit the slider 3. The slider 3 has a corresponding limiting groove. When the slider 3 is subjected to a lateral thrust, this structure can achieve bilateral force distribution and uniform force distribution. Specifically, regardless of whether the slider 3 is subjected to a leftward or rightward thrust, the guide rail always has a first limiting edge and a second limiting edge supporting the slider, avoiding the problem of the guide rail deforming due to only one side supporting the slider.

[0028] In a preferred embodiment, an adjustment structure is also included to change the force required to unlock the lock. This structure includes a second elastic element 20 opposite to the first elastic element 5 and a limiting element that restricts the movement of the locking element 24 away from the slider 3. The first elastic element 5 is located on the side closer to the slider 3, and the second elastic element 20 is located on the side away from the slider 3. When the door or window is opened, the side of the slider 3 that first approaches the locking element 24 is the approach side, and the other side is the side away from the slider 3. The middle part of the locking element 24 slides with the guide rail. The limiting element can restrict the up and down movement of the locking element 24 on the side of the second elastic element 20. By limiting and releasing the limiting element, the resistance required to unlock the lock between the locking element 24 and the slider 3 is adjusted.

[0029] Two closing methods are available at this time. The first closing method is manual closing. The limiting member restricts the locking member 24 to move up and down. The slider 3 presses the locking member 24 up and down and presses the first elastic member 5. Since the locking member 24 on one side of the limiting member cannot move upward, it can only rely on the upward movement and slight rotation of the other side. Therefore, a relatively large force needs to be overcome to close the door.

[0030] In the second closing method, the limiting component releases the restriction on the locking component 24. At this time, the slider 3 presses down, allowing both sides of the locking component 24 to slide up and down. The two elastic components provide elastic force at both ends, allowing the locking component 24 to slide up and down within the guide rail. The locking component 24 can also rotate at a certain angle. Therefore, only a small amount of resistance needs to be overcome to unlock it (generally, the closing force of a door closing device is not very large, not as strong as when a door is closed manually). Compared to the previous seesaw structure with a middle hinge and one end locked, this structure can also output force better on the second spring side. In conjunction with the up and down sliding and swinging of the locking component 24, while maintaining a secure lock, it is not only easier to enter the locked position, but also allows for unlocking with two modes of resistance. The structure is more reasonable and has a longer service life.

[0031] At this point, one side of the linkage 2 can be connected to a conventional automatic door closing device (or a regular door or window with a return spring that provides closing force). The closing device provides closing power as part of the automatic closing procedure. It should be noted that the second elastic element not only provides some resistance to release but also provides the locking element 24 with a return force, preparing for the next stroke.

[0032] In addition, to adjust the overall force required to unlock, an adjusting bolt is provided inside the first elastic element 5. This adjusting bolt can be adjusted up and down within the guide rail, further adjusting the up and down position of the locking element 24 and the elastic force of the first elastic element 5. These factors collectively affect the force required to unlock. Adjusting it upwards causes the locking element 24 to move upwards away from the slider 3, thus reducing the force required to unlock. Furthermore, it further compresses the first elastic element 5, changing its elastic force and further affecting the force required to unlock. It should be noted that the adjusting bolt not only adjusts the force required to unlock but also provides a guide for the first elastic element 5, preventing misalignment. Similarly, an adjusting bolt can also be provided inside the second elastic element 20. Ordinary springs can be used as the elastic elements.

[0033] In a preferred embodiment, the limiting member includes a swing member 13 and a power member 14 for driving the swing member 13 to swing (in this embodiment, a solenoid valve is used as the power member). The swing of the swing member 13 can limit or release the limitation on the locking member 24.

[0034] The swing member 13 is provided with a first limiting point and a second limiting point from bottom to top. When locked, the first limiting point restricts the vertical movement of one side of the locking member 24. After the locking member 24 moves upward and releases the slider 3 from the locking member 24, the locking member 24 resets downward under the elastic force of the first and second elastic members 20. At this time, the swing member 13 can quickly return to its original position under the action of the power member 14, and the locking member 24 falls to the second limiting point position to prevent the locking member 24 and the slider 3 from locking again. At this time, the door and window can cooperate with the door closing device, and the door can close automatically. In fire-fighting conditions, even if the door is manually opened to its original locked position (during a fire, there is a high probability that someone will open the door to escape), the door and window will automatically close under the action of the automatic door closing device because the locking element 24 has not fallen back to the position where the slider 3 can be locked (during a fire, it is necessary to keep the door and window closed to prevent air from entering and causing the fire to intensify; if air cannot enter, the fire will be extinguished after the oxygen is exhausted, and it also prevents the fire from spreading). When the power element 14 is activated again, the locking element 24 falls back to the first limit point, and the door and window locking element 24 and slider 3 can be locked again.

[0035] Returning to the initial position, when the doors and windows are manually opened to the locked position, they will remain open and locked. At this time, a reset button can be set up, which can move the swinging part 13 to make the locking part 24 fall back to the first limit point. When the fire ends, the locking part 24 can be reset by using the reset button.

[0036] The locking component 24 includes a push plate 17 and a locking shaft 8. The guide rail has a sliding groove 9 that mates with the locking shaft 8 (allowing the locking shaft 8 to slide smoothly up and down without leaving its predetermined working range). The slider 3 has a locking position that mates with the locking shaft 8. In this case, the locking shaft 8 serves as both a sliding shaft and a locking protrusion. The locking shaft 8 and the push plate 17 can be integrated or separate. Alternatively, the locking component 24 includes a push plate 17 with a locking protrusion, and the guide rail has a sliding groove 9 that mates with the push plate 17. In this case, a separate locking shaft 8 is not required; only a locking protrusion is needed. The slider 3 has a locking position, and the push plate 17 has a sliding end that mates with the sliding groove 9 of the guide rail.

[0037] Furthermore, the pressing plate 17 has an upwardly bent edge at one end of the first elastic member 5 to restrict the downward rotation of the pressing plate 17. The upward bending of one end of the pressing plate 17 thus... Figure 3 For example, the push plate 17 can only rotate counterclockwise, and the bent edge will restrict its clockwise rotation. When unlocking, counterclockwise rotation can reduce the resistance to unlocking, prevent the push plate 17 from getting stuck in the guide rail, and provide a certain limiting function. In addition, in order to facilitate the sliding of the slider 3 into the lock, the side of the slider 3 that enters the lock can be set as a ramp.

[0038] Furthermore, a stabilizing plate 16 is mounted on the end of the push plate 17 away from the resistance adjustment mechanism. The guide rail 1 is provided with a stabilizing groove that matches the stabilizing plate 16. The stabilizing groove restricts the movement of the stabilizing plate 16 in a direction perpendicular to the movement of the slider 3. The push plate 17, in conjunction with the stabilizing plate 16 and the stabilizing groove, makes the vertical movement of the end of the push plate 17 away from the resistance adjustment mechanism more stable.

[0039] In a preferred embodiment, the guide rail component 1 is provided with a detachable mounting base 4, and the locking component 24 and the first elastic component 5 are fixed to the mounting base 4. Preferably, the mounting base is provided with threaded holes facing the guide rail component and fastening bolts. By rotating the fastening bolts on the threaded holes and protruding outwards, the guide rail component is pressed, thereby fixing the mounting base and the guide rail component. In this way, the above-mentioned structures related to the locking of the slider 3 can all be integrated into the mounting base 4, improving integration and facilitating installation and disassembly. Multiple installation positions can be provided in the guide rail component 1, and the mounting base 4 can be selected according to different installation positions as needed. Different installation positions will change the locking position, resulting in different door and window opening angles, which also makes adjustment easier.

[0040] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made in accordance with the claims of the present invention should still fall within the scope of protection intended by the patent of the present invention. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The present invention may also have other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the claims of the present invention.

[0041] The principle of sliding and fixing between the mounting base 4 and the guide rail 1 is as follows: like Figure 5 As shown, the guide rail component 1 is a sleeve-shaped structure with a groove on one side. The mounting base 4 is slidably fitted inside the guide rail component 1, and the slider 3 is slidably disposed at the groove. The guide rail component 1 has an upwardly protruding rod protrusion 18 at the bottom middle section on its inner side. The mounting base 4 has downwardly protruding seat protrusions 19 on the left and right sides of its outer surface. The rod protrusion 18 and the seat protrusion 19 are trapezoidal in shape. When the mounting base 4 moves downwards close to the guide rail component 1, the inclined side surfaces of the left and right seat protrusions 19 contact the inclined side surfaces of the middle rod protrusion 18, causing the mounting base 4 to exert a force on the rod protrusion 18 from both sides towards the middle, thus clamping the rod protrusion 18 and generating clamping friction.

[0042] In addition, the inner side of the guide rail component 1 also has a downwardly protruding rod protrusion 18 on the side of the top opening, and the outer side of the mounting base 4 has upwardly protruding seat protrusions 19 on the left and right sections of the top. The rod protrusions 18 and the seat protrusions 19 are trapezoidal in shape. When the mounting base 4 moves upward and approaches the inner top surface of the guide rail component 1, the side slopes of the left and right seat protrusions 19 contact the side slopes of the middle rod protrusion 18, causing the mounting base 4 to generate a component force on the rod protrusion 18 from the left and right sides towards the middle, thus clamping the rod protrusion 18 and generating clamping friction. This fixing method that generates a clamping component force makes the guide rail component 1 less prone to deformation and is beneficial for long-term use.

[0043] The principle of automatic fixing and unlocking between the push plate 17 and the slider 3 is as follows: like Figure 3 As shown, slider 3 is already in a fixed state. At this time, if slider 3 is pushed to the right with sufficient force, it can overcome the upward force of the locking shaft 8, press the locking shaft 8 down and push it away from the positioning point 6, and then slide freely to the right, thus releasing the lock between the door panel and the door frame.

[0044] When slider 3 moves from right to left, it first overcomes the upward force of the support spring and then presses down the locking shaft 8 and the push plate 17. Then, when the positioning point 6 of slider 3 reaches above the locking shaft 8, the locking shaft 8 and the push plate 17 are pushed upward by the support spring, so that the locking shaft 8 is locked into the positioning point 6, thus fixing slider 3.

[0045] The principle of interaction between the swing member 13, the push plate 17, and the stabilizing plate 16 is as follows: like Figure 3 As shown, at this time, the upper left end of the push plate 17 is blocked by the mounting base 4, and the lower left end is blocked by the limiting protrusion 15 of the swing member 13. This prevents the push plate 17 from moving up and down in parallel as a whole, and it can only rotate around the left end of the push plate 17 as the axis of rotation. In this state, the force that the slider 3 needs to overcome to move to the right away from the restriction of the locking shaft 8 increases significantly, making it very difficult. This keeps the door panel and door frame in a forced locked state.

[0046] When the power component 14 of the locking device is activated, it drives the swing component 13 to rotate counterclockwise around its bottom pivot and then reset. During this process, the push plate 17 will move downward due to the slider 3 and be inserted by the limiting protrusion 15 after the swing component 13 is reset, so that the left end of the push plate 17 is restricted below the limiting protrusion 15. In this way, the limiting part 7 of the push plate 17 is kept away from the slider 3, which causes the locking shaft 8 to be unable to be inserted upward into the limiting part 7 of the slider 3. The push plate 17 can hardly or even completely restrict the movement of the slider 3, and the door panel and door frame enter the forced unlocking state.

[0047] When the stabilizing plate 16 is installed on the push plate 17, it will be installed at the end close to the limiting protrusion 15, which is the left end of the push plate 17 in the figure. The interaction principle between the left end of the push plate 17 and the limiting protrusion 15 also applies to the interaction principle between the stabilizing plate 16 and the limiting protrusion 15.

[0048] The principle behind the setting of the limiting point 7 on the push plate 17 and the setting of the positioning point 6 on the slider 3 is as follows: like Figure 3 As shown, the cross-section of the retaining shaft 8 is cylindrical, and the limiting point 7 and the positioning point 6 are in the shape of a semi-circular arc. This way, when the upper part of the retaining shaft 8 is inserted into the positioning point 6, the movement will be fast, and when the retaining shaft 8 is removed from the positioning point 6, it will be smooth and gentle.

[0049] The principle behind the structural cooperation between the slider 3 and the guide rail 1 to prevent deformation is as follows: like Figure 6 As shown, when the slider 3 slides on the guide rail 1, whether pressure is applied to the left or the right, both ends of the guide rail 1 will support the slider 3 simultaneously, and it will not deform because only one side bears the pressure.

[0050] It should be noted that the attached diagram shows a configuration where guide rail 1 is connected to the door frame and connecting rod 2 is connected to the door panel, with guide rail 1 on top and connecting rod 2 on the bottom. However, connecting guide rail 1 to the door panel and connecting rod 2 to the door frame can achieve the same effect. Alternatively, placing guide rail 1 on the bottom and connecting rod 2 on top can also achieve the same effect. Even fixing guide rail 1 to the ground and connecting rod 2 to the door panel can achieve the same technical effect.

[0051] In summary, those skilled in the art, after reading this invention document, can make various other corresponding modifications to the technical solutions and concepts based on this invention without creative mental effort. Different application scenarios all fall within the scope of protection of this invention.

Claims

1. A door and window locking mechanism for maintaining the opening degree of doors and windows in a locked state, characterized in that, include, A guide rail (1) and a connecting rod (2), one of which is connected to the door / window frame and the other to the door / window sash. A slider (3) can slide within the guide rail (1). The connecting rod (2) is connected to the guide rail (1) via the slider (3). When the door and window are opened and closed, the door and window sashes drive the slider (3) to slide within the guide rail (1) via the connecting rod (2). The system also includes... A locking element (24) is provided, which can slide up and down in the guide rail. One end of the locking element (24) is provided with a first elastic element (5). The slider (3) and the locking element (24) are respectively provided with locking positions and locking protrusions that cooperate with each other. When the door and window are opened, the slider (3) is moved to the position of the locking element (24). The slider (3) pushes the locking element (24) to move and pushes the first elastic element (5), so that the locking element (24) and the slider (3) are locked in position through the locking position and locking protrusion to maintain the opening of the door and window. When closed, the door and window drive the slider block to push the first elastic element (5) to release the locking protrusion from the locking position, thereby closing the door and window. It also includes a second elastic member (20) opposite to the first elastic member (5) and a limiting member that limits the movement of the locking member (24) away from the slider (3). The first elastic member (5) is located on the side closer to the slider (3), and the second elastic member (20) is located on the side away from the slider (3). By limiting and releasing the limiting member, the magnitude of the resistance required to unlock the locking member (24) and the slider (3) is adjusted.

2. The door and window locking mechanism according to claim 1, characterized in that, The locking member (24) slides with the guide rail in the middle, and the limiting member restricts the up and down movement of the locking member (24) on one side of the second elastic member (20).

3. The door and window locking mechanism according to claim 1, characterized in that, The limiting member includes a swing member (13) and a power member (14) for driving the swing member (13) to swing. The swing of the swing member (13) can limit or release the limitation on the locking member (24).

4. The door and window locking mechanism according to claim 3, characterized in that, The swing member (13) is provided with a first limiting point and a second limiting point from bottom to top. When locked, the first limiting point limits the movement of the locking member (24) up and down on one side. After the locking member (24) moves up and the slider (3) and the locking member (24) are unlocked, the locking member (24) is reset downward under the elastic force of the first and second elastic members (20). At this time, the swing member (13) can quickly return to its original position under the action of the power member (14). The locking member (24) falls to the second limiting point to prevent the locking member (24) and the slider (3) from locking again. At this time, the door and window can be opened and closed freely. When the power member (14) moves again, the locking member (24) falls back to the first limiting point. At this time, after the door and window are opened, the locking member (24) and the slider (3) can be locked again.

5. The door and window locking mechanism according to claim 1, characterized in that, The locking component (24) includes a push plate (17) and a retaining shaft (8). The guide rail component (1) is provided with a sliding groove (9) that mates with the retaining shaft (8). The slider (3) is provided with a locking position that mates with the retaining shaft (8). The locking member (24) includes a push plate (17), the push plate (17) is provided with a locking protrusion, and the guide rail is provided with a sliding groove (9) that cooperates with the push plate (17).

6. The door and window locking mechanism according to claim 5, characterized in that, The push plate (17) has an upward bending edge at one end of the first elastic member (5) to restrict the push plate (17) from rotating downward.

7. The door and window locking mechanism according to claim 1, characterized in that, An adjusting bolt (11) is provided inside the first elastic member (5). The adjusting bolt (11) can be adjusted up and down in its position in the guide rail to adjust the maximum extension range of the first elastic member (5), thereby adjusting the maximum resistance of the locking member (24) to the slider.

8. The door and window locking mechanism according to any one of claims 1-7, characterized in that, The guide rail component (1) is provided with a detachable mounting base (4), and the locking component (24) and the first elastic component (5) are fixed on the mounting base (4).

9. The door and window locking mechanism according to claim 1, characterized in that, The guide rail (1) is provided with a guide groove, the slider (3) slides in the groove, the groove bends inward and forms an inwardly curved protrusion (21), forming a first limiting edge (22) and a second limiting edge (23) that can limit the slider (3), and the slider (3) forms a corresponding limiting groove.

10. The door and window locking mechanism according to claim 5, characterized in that, A stabilizing plate (16) is installed on the end of the push plate (17) away from the resistance adjustment mechanism. The guide rail (1) is provided with a stabilizing groove that matches the stabilizing plate (16). The stabilizing groove restricts the stabilizing plate (16) from moving in a direction perpendicular to the slider movement direction.

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