Door and window closer

Abstract

The present invention relates to a door and window closer, comprising a mounting seat, a pull rod, a sliding mechanism, a limiting mechanism and a driving mechanism; the pull rod is hingedly mounted on the mounting seat and the edge of the hinged end is a gear structure; the sliding mechanism is movably connected to the mounting seat and comprises a limiting mechanism and a row of teeth arranged along the movement direction; the sliding mechanism is driven by the driving mechanism to change from a first movement state to a second movement state; when in the first movement state, the limiting mechanism is engaged with the hinged end of the pull rod; when in the second movement state, the row of teeth is engaged with the hinged end of the pull rod to rotate the pull rod; the driving mechanism locks the sliding mechanism within a specific ambient temperature and drives the sliding mechanism to change from the first movement state to the second movement state above the specific ambient temperature. The present invention greatly reduces the volume of the door and window closer by arranging a gear structure at the junction and using the gear structure to simultaneously provide damping in normal times and automatically close in an emergency.

Description

Technical Field

[0001] The invention relates to the field of fireproof doors and windows, and in particular to a door and window closer. Background Art

[0002] With the development of my country's construction industry, building doors and windows have higher requirements for smoke and flame barrier performance to prevent major losses in the event of a fire. In order to have better fire protection performance, fireproof doors and windows are required to have the function of automatically closing in the event of a fire. At the same time, in order to facilitate daily use, fireproof doors and windows are also required to be able to open and close flexibly during daily use.

[0003] However, in the prior art, in order to achieve the function of automatic closing, fire-resistant doors and windows usually use elastic mechanisms to increase the closing force of the doors and windows. In daily use, in order to ensure that the doors and windows do not close automatically, they usually use limit mechanisms to overcome the closing force so that the doors and windows do not close automatically under normal conditions.

[0004] In addition, the structure of the limiting mechanism is also designed to be quite complex, and it is difficult to accommodate these limiting mechanisms in a relatively narrow space. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a door and window closer, comprising a mounting seat, a pull rod, a sliding mechanism, a limiting mechanism and a driving mechanism;

[0006] The pull rod is hingedly mounted on the mounting seat and a gear structure is provided at the edge of the hinged end;

[0007] The sliding mechanism is movably connected to the mounting seat and includes a limiting mechanism and a row of teeth arranged along the moving direction; the sliding mechanism is driven by the driving mechanism to change from a first moving state to a second moving state;

[0008] When in the first motion state, the limiting mechanism is limitedly connected with the hinged end of the pull rod; when in the second motion state, the pull rod is separated from the limiting mechanism and the row of teeth is engaged with the hinged end of the pull rod, so that the pull rod rotates;

[0009] The driving mechanism locks the sliding mechanism within a specific ambient temperature, and drives the sliding mechanism to change from a first motion state to a second motion state above the specific ambient temperature.

[0010] In some embodiments, the gear structure is sleeved on the hinge axis of the pull rod and the mounting seat and is located between the pull rod and the sliding mechanism, and a toggle member is vertically extended from the edge of one end face of the gear structure that is perpendicular to the pull rod. A damping ring is provided between the pull rod and the gear structure; a damping layer is provided on the side of the toggle member, and the damping layer abuts against the edge of the pull rod.

[0011] In some embodiments, the limiting mechanism is arranged at the first end of the sliding mechanism, the row of teeth is arranged at the middle section of the sliding mechanism, and the driving mechanism is connected to the second end opposite to the first end. The driving mechanism includes a driving member, which is a compression spring, one end of which is fixedly arranged, and the other end is connected to the second end of the sliding mechanism, so that the driving member is in a potential accumulation state in the first motion state.

[0012] In other embodiments, the row of teeth is arranged at the first end of the sliding mechanism, the limiting mechanism is arranged at the middle section of the sliding mechanism, and the driving mechanism is connected to the second end opposite to the first end. The driving mechanism includes a driving member, which is a tension spring, one end of which is fixedly arranged, and the other end is connected to the second end of the sliding mechanism, so that the driving member is in a potential accumulation state in the first motion state.

[0013] Furthermore, the driving mechanism also includes a locking device, which includes a first slide groove, a limit shaft, and a locking module extending from the middle section of the sliding mechanism to the second end; a bayonet is opened at one end of the first slide groove, and the limit shaft is fixed to the mounting seat after passing through the bayonet, and the locking module abuts against the limit shaft to limit the limit shaft from falling into the first slide groove; the locking module releases the limit shaft after being heated, and the limit shaft falls into the first slide groove, so that the sliding of the sliding mechanism is not affected by the limit shaft.

[0014] In some embodiments, the driving mechanism includes a locking device, the locking module includes a temperature sensing unit and a pushing piece, the pushing piece abuts against the limit shaft to fix the limit shaft in the bayonet, one end of the temperature sensing unit is directly or indirectly fixed to the driving mechanism body, and the other end abuts against the pushing piece.

[0015] In some embodiments, the limiting mechanism includes a limiting screw and a screw bracket extending upward perpendicular to the plane of the sliding mechanism, the screw bracket is provided with a limiting screw hole, the limiting screw spirally passes through the limiting screw hole and abuts against the edge of the hinge end of the pull rod. A damping member is provided at the abutment between the limiting screw and the pull rod.

[0016] In other embodiments, the gear structure is arranged and distributed around the edge of the hinged end of the pull rod, and the limiting mechanism includes a limiting spring sheet, the first end of which is fixed to the sliding mechanism, and the second end abuts against the edge of the hinged end of the pull rod, and a protrusion facing the pull rod is provided at the abutment. The limiting mechanism also includes an eccentric screw, which is screwed on the sliding mechanism and abuts against the back of the second end of the limiting spring sheet.

[0017] The shape of the driving mechanism also includes a long strip-shaped storage groove body, which is clamped with the mounting seat. A screw hole is provided on one side wall of the storage groove body. After the locking screw is screwed through the screw hole, it abuts against the first side of the fusible metal. The second side surface of the fusible metal opposite to the first side abuts against the side wall of the limiting shaft.

[0018] Furthermore, the mounting seat, the sliding mechanism and the pull rod are stacked in sequence; the sliding mechanism is provided with a second sliding groove for avoiding the hinge axis between the pull rod and the mounting seat.

[0019] In some embodiments, a clearance portion is provided at one end of the second sliding groove close to the limiting mechanism, and the clearance portion is located at a side away from the row of teeth.

[0020] Furthermore, the row of teeth is teeth, recessed holes or through holes arranged along the moving direction of the sliding mechanism.

[0021] In some embodiments, the end of the pull rod is hinged to the tension adjustment slider, and the tension adjustment slider is movably installed on a preset window sliding track; an expansion groove is opened on the tension adjustment slider along the movement direction, and a temperature sensing element is interference-embedded in the expansion groove to expand the width of the expansion groove; the tension adjustment slider also includes a push-out piece arranged parallel to the movement direction of the tension adjustment slider, and the push-out piece is screwed on the end of the tension adjustment slider and pushes the temperature sensing element into the expansion groove.

[0022] In other embodiments, the end of the pull rod is hinged to the tension adjustment slider, and the tension adjustment slider is movably installed on a preset window sliding track; an expansion groove is opened on the tension adjustment slider along the movement direction, and an embedding pin is inserted in the expansion groove to expand the width of the tension adjustment slider; an extended card table is provided at the rear end of the embedding pin, and the front end passes through the compression spring and is embedded in the expansion groove; a push piece is provided at the end of the tension adjustment slider near the rear end of the embedding pin, and the rear end face of the embedding pin abuts against the push piece through a temperature sensing element to compress the compression spring.

[0023] The door and window closer of the present invention has the following technical effects:

[0024] 1. By setting a gear structure at the junction, and using the gear structure to provide damping in normal times and automatically close in emergencies, the volume of the door and window closer is greatly reduced.

[0025] 2. Providing driving force for closing doors and windows through linear force can ensure the stability and reliability of the driving force.

[0026] 3. The locking of the automatic closing function is achieved by the cooperation of fusible metal and limit column, which simplifies the structure of the closer.

[0027] 4. The damping function and automatic closing function work in time-sharing and are independent of each other, which prolongs the product life and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is the structural principle diagram and the first motion state principle diagram of the door and window closer in Example 1 of this patent.

[0029] Figure 2 This is a schematic diagram of the second motion state of the door and window closer in Example 1 of this patent.

[0030] Figure 3 This is a structural principle diagram of the sliding mechanism in Example 1 of this patent.

[0031] Figure 4 This is a side view of the structural principle of the door and window closer in the embodiment of this patent.

[0032] Figure 5 This is a structural principle diagram of the pull rod and sliding mechanism in Example 2 of this patent.

[0033] Figure 6 This is a schematic diagram of the structure principle of the limiting mechanism in Example 3 of this patent.

[0034] Figure 7 This is a schematic diagram of the structural principle of the locking device in Example 4 of this patent.

[0035] Figure 8 This is a schematic diagram of the tension adjustment slider structure in Example 5 of this patent.

[0036] Fig. 9 This is a schematic diagram of the expanded tension adjustment slider structure in Example 5 of this patent.

[0037] Fig.10 This is a schematic diagram of the tension adjustment slider structure in Example 6 of this patent.

[0038] Among them, the mounting seat is 10, and the hinge shaft is 11;

[0039] The pull rod is 20, the gear structure is 21, the toggle member 211, and the damping ring 22;

[0040] The sliding mechanism is 30, the row of teeth is 31, and the second sliding groove is 32;

[0041] The limiting mechanism is 40, the limiting spring piece is 41, the protrusion is 42, the eccentric screw is 43, the screw 44, the screw bracket 45, and the damping member 46;

[0042] The driving mechanism is 50, the driving member is 51, the locking device is 52, the first sliding groove is 53, the limiting shaft is 54, the locking module is 55, the temperature sensing unit is 551, the pushing member is 552, the crossbeam is 553, the screw structure is 554, the bayonet is 56, and the storage slot is 57.

[0043] The tension adjustment slider is 60 , the expansion slot is 61 , the fusible metal is 62 , and the ejector is 63 . DETAILED DESCRIPTION

[0044] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby more clearly defining the protection scope of the present invention.

[0045] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "head", "tail", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] Embodiment 1:

[0047] Embodiments of the present invention Figure 1 As shown, Figure 1 The schematic diagram of the structure of a door and window closer is shown. The door and window disclosed in this embodiment is used to automatically close the door and window in the event of a fire. In normal times, it can provide door and window damping to enable it to have a certain wind resistance. Its overall structure is simple, small in size, safe and reliable. It can be installed on aluminum alloy doors and windows, and plastic steel doors and windows, and can be directly installed on the window sash or window frame.

[0048] For details, please see Figure 1 and Figure 2 The door and window closer includes a mounting seat 10, a pull rod 20, a sliding mechanism 30, a limiting mechanism 40 and a driving mechanism 50.

[0049] The mounting base 10 is used to be mounted on the door and window frame, and is provided with a plurality of screw holes, so as to be convenient for locking the mounting base 10 with the door and window frame by screws. In some embodiments, the mounting base 10 can be a long strip structure, so as to be convenient for matching with other components.

[0050] The pull rod 20 is hingedly mounted on the mounting seat 10 so that the pull rod 20 can rotate about the hinge axis. The hinged end edge of the pull rod 20 is a gear structure 2121. The other end opposite to the hinged end is connected to the door and window. Usually, when connected to the door and window, a slide groove is installed on the door and window, and a slider is installed on the pull rod 20 so that the slider can slide on the slide groove. Since this part of the structure is a prior art, it is not repeated in this embodiment.

[0051] The sliding mechanism 30 is movably connected to the mounting seat 10. Specifically, the sliding mechanism 30 is movably connected to the mounting seat 10 along the length direction of the mounting seat 10. It includes a limit mechanism 40 and a row of teeth 31 arranged along the movement direction. The sliding mechanism 30 can achieve two movement states. The two movement states are respectively a first movement state in its normal state and a second movement state for emergency closing of doors and windows.

[0052] Specifically, when in the first motion state, the limit mechanism 40 is engaged with the hinged end of the pull rod 20. At this time, the limit mechanism 40 can provide a certain damping force for the rotation of the pull rod 20, so that it can be fixed at its opening angle within a certain force range. When in the second motion state, the row of teeth is engaged with the hinged end of the pull rod 20, and when the sliding mechanism 30 slides, the row of teeth 31 will be linked with the pull rod 20, and the pull rod 20 will rotate as the row of teeth 31 slides.

[0053] The driving mechanism 50 is used to drive the sliding mechanism 30 to slide, so that it changes from the first motion state to the second motion state. The driving mechanism 50 can be a linear energy storage mechanism, and its driving force is linear, and the direction is the same as the sliding direction of the sliding mechanism. Since the sliding mechanism 30 needs to be maintained in the first motion state at ordinary times, the driving mechanism 50 needs to be locked. When a fire occurs, it is usually judged that the ambient temperature reaches a specific temperature and it is judged to be an emergency. Under normal circumstances, according to industry regulations, when the temperature reaches 60 degrees Celsius or above and is maintained for a certain period of time, it can be considered that there is a fire, and the driving mechanism 50 releases the locking state and drives the sliding mechanism 30 to change from the first motion state to the second motion state.

[0054] Since the limiting mechanism 40 and the row of teeth are both arranged on the sliding mechanism 30, the switching coordination can be realized as the sliding mechanism 30 slides. While providing damping, they will not affect each other in the case of emergency closing, which greatly improves the reliability of the closer and reduces the size.

[0055] See also Figure 3 , Figure 3The schematic diagram shows the structural principle of the sliding mechanism 30 in some embodiments. Specifically, the sliding mechanism 30 includes three parts that can be divided into a first end, a middle section and a second end along the length direction, and the first end and the second end are opposite. The limiting mechanism 40 is arranged at the first end, the row of teeth 31 is arranged at the middle section of the sliding mechanism 30, and the driving mechanism 50 is connected to the second end. The limiting mechanism 40 and the row of teeth are both arranged along the meshing plane with the pull rod 20, that is, when the sliding mechanism 30 is in the first motion state, the pull rod 20 is meshed with the limiting mechanism 40, and its rotation is limited by the limiting mechanism 40. The pull rod 20 needs to overcome the limiting mechanism 40 before it can rotate. When the sliding mechanism 30 enters the second motion state, the sliding mechanism 30 is driven to move by the driving mechanism 50, the pull rod 20 is separated from the limiting mechanism 40, and contacts with the row of teeth, and the gear mechanism of the pull rod 20 is meshed with the row of teeth.

[0056] In this embodiment, the limiting mechanism 40 includes a limiting spring sheet 41, which can be a high-strength elastic metal sheet. The first end of the spring sheet is fixed to the sliding mechanism 30, and the second end is a free end. When the sliding mechanism 30 is in the first motion state, the second end abuts against the edge of the hinge end of the pull rod 20. In order to better mesh with the gear, a protrusion 42 facing the pull rod 20 is provided at the abutment of the second end, and the protrusion 42 falls into the tooth groove of the gear under the action of the spring sheet to achieve limiting.

[0057] In some preferred embodiments, in order to achieve adjustable force of the limiting mechanism 40, an eccentric screw 43 may be provided at the second end of the limiting spring sheet 41, and the eccentric screw 43 abuts against the back surface of the second end of the limiting spring sheet 41. In the process of rotating the eccentric screw 43, the limiting spring sheet 41 may be forced to approach the pull rod 20 or move away from the pull rod 20, thereby adjusting the tightness of the abutment.

[0058] See also Figure 3 and Figure 4 The mounting seat 10, the sliding mechanism 30 and the pull rod 20 are stacked in sequence, and the sliding mechanism 30 is provided with a second sliding groove 32 to avoid the hinge axis of the pull rod 20 and the mounting seat 10. Under this structure, the sliding mechanism 30 is clamped between the mounting seat 10 and the pull rod 20, and effectively maintains stability during the sliding process.

[0059] It can be understood that the row of teeth and the limiting mechanism 40 are two relatively independent functional structures. In some embodiments, the position of the row of teeth and the position of the limiting mechanism 40 can be exchanged, that is, the row of teeth 31 is set at the first end of the sliding mechanism 30, the limiting mechanism 40 is set at the middle section of the sliding mechanism 30, and the driving mechanism 50 is connected to the second end opposite to the first end. In this case, the corresponding function can be achieved by adjusting the driving direction of the driving mechanism 50.

[0060] See also Figure 1 , 2and 5, Figure 5 The structural principle of the driving mechanism 50 is illustrated. The driving mechanism 50 includes a driving member 51 and a locking device 52.

[0061] The driving member 51 is a compression spring or a tension spring, one end of the driving member 51 is fixedly arranged, and the other end is connected to the second end of the sliding mechanism 30. It can be understood that the use of the tension spring or the compression spring is selected according to the structure of the sliding mechanism 30. When the limiting mechanism 40 in the sliding mechanism 30 is arranged at the first end, the driving member 51 uses a compression spring to push the sliding member so that the row of teeth 31 can engage the pull rod 20 during the sliding process. When the sliding member is in the first motion state, the compression spring is in a compressed state. Correspondingly, when the row of teeth 31 in the sliding mechanism 30 is arranged at the first end of the sliding mechanism 30, the driving member 51 should use a tension spring, and when the driving mechanism 50 is in the first motion state, the tension spring is in a stretched state.

[0062] As for the locking device 52, the locking device 52 is used to lock the sliding mechanism 30 in the first motion state. In this embodiment, the locking device 52 includes a first slide groove 53 extending from the middle section of the sliding mechanism 30 to the second end, a limit shaft 54, and a locking module 55. In this embodiment, the locking module 55 is a fusible metal, and one end of the first slide groove 53 is provided with a bayonet 56. The limit shaft 54 ​​passes through the bayonet 56 and is fixed on the mounting seat 10. The locking module 55 abuts against the limit shaft 54 ​​to limit the limit shaft 54 ​​from falling into the first slide groove 53. When the locking module 55 softens by heat, the limit shaft 54 ​​falls into the first slide groove 53, so that the sliding mechanism 30 can move and slide without being affected by the limit shaft 54. In order to make the abutment structure more stable, a matching groove is provided at the abutment between the fusible metal and the limit shaft.

[0063] In some embodiments, the drive mechanism 50 further includes a long strip-shaped storage slot 57, which can be a U-shaped slot or a square tube slot. The storage slot 57 is connected to the mounting seat 10. In order to facilitate installation, two latching teeth are extended laterally to the two sides at one end of the mounting seat in contact with the storage slot. Correspondingly, the storage slot 57 and the latching teeth are provided with latching holes at the corresponding positions thereof for the latching teeth to be inserted.

[0064] A screw hole is provided on one side wall of the storage tank body 57. After the locking screw is screwed through the screw hole, it abuts against the first side of the fusible metal 55. The second side surface of the fusible metal 55 opposite to the first side abuts against the side wall of the limit shaft 54. This structure is used to limit the limit shaft 54 ​​in the bayonet 56. After the fusible metal is softened by heat, the limit shaft can be separated from the bayonet and enter the first slide groove. It is understandable that the above-mentioned setting method of the fusible metal is only one form. The fusible metal 55 can be replaced by a temperature-induced deformation device such as a temperature-controlled glass ball. As long as it can limit the limit shaft from falling into the first limit groove at room temperature, and can achieve deformation at a specific temperature to cancel the limit, it will be fine.

[0065] Embodiment 2:

[0066] As an improvement of Example 1, the difference between this embodiment and Example 1 is that the pull rod and the gear structure in this embodiment are of split design.

[0067] See also Figure 5 In this embodiment, the gear structure 21 and the pull rod 20 are of stacked design. From the overall structure, the mounting base 10, the sliding mechanism 30, the pull rod 20 and the gear structure 21 are stacked from bottom to top, and the four are penetrated by a hinge shaft 11. Among them, due to the relationship of the second slide groove 32, the sliding mechanism 30 can still slide, while the gear structure 21 and the pull rod 20 can rotate with the hinge shaft 11 as the axis.

[0068] The gear structure 21 and the pull rod 20 are in close contact, and there is strong damping between them to prevent the window from being easily affected by strong winds and causing rotation. Under normal circumstances, the pull rod 20 needs to overcome the damping rotation during the process of opening and closing the window. In an emergency, when the sliding mechanism 30 enters the second motion state, since the gear structure 21 and the row of teeth 31 of the sliding mechanism 30 are always in a meshing state, the sliding mechanism 30 will drive the gear structure 21 to rotate. In order to make the gear structure 1 also drive the pull rod 20 to rotate, the gear structure 21 and the end face edge of the pull rod 20 extend vertically to a toggle member 211. During the rotation of the toggle member 211, it contacts the side of the pull rod 20, thereby also driving it to rotate, and realizing the emergency closing of the window.

[0069] In addition, in order to provide damping for the pull rod 20 and the gear structure 21 in normal use, a damping ring 22 may be disposed between the pull rod 20 and the gear structure 21 , thereby increasing the friction between the pull rod 20 and the gear structure 21 .

[0070] At the same time, since the gear structure 21 does not rotate in normal situations, in order to further improve the damping, a damping layer is provided on the side of the toggle member 211, and the damping layer abuts against the edge of the pull rod 20, which can be achieved by sleeved damping material on the toggle member 211. This structure can also increase the abutment tightness between the gear structure 21 and the pull rod 20 in an emergency, thereby improving the efficiency of closing the window.

[0071] Embodiment 3:

[0072] As an improvement of Example 2, the difference between this example and Example 2 is that the limiting structure in this example adopts a screw structure.

[0073] For details, see Figure 6In this embodiment, the limiting mechanism 40 is an adjustable screw structure, and the rotation of the pull rod 20 is limited by adjusting the screw so that one end of the screw abuts against the pull rod 20.

[0074] Specifically, it includes a limit screw 44 and a screw bracket 45. The screw bracket 45 extends upward perpendicular to the plane of the sliding mechanism 30. In production, it can be formed by bending sheet metal or welding. The angle of the plane of the screw bracket 45 is preferably parallel to the cross section of the hinge of the pull rod 20. At the same time, a limit screw hole is provided on the screw bracket 45. The limit screw 44 passes through the limit screw hole and abuts against the edge of the hinge end of the pull rod 20. In order to avoid hard contact between the limit screw 44 and the pull rod 20, a damping member 46 can be provided at the abutment between the limit screw 44 and the pull rod 20, wherein a receiving groove for the damping member 46 is provided at the abutment of the limit screw 44, and one end of the damping member is inserted into the receiving groove, and the other end is exposed. The damping member 47 is made of wear-resistant materials such as silicone or rubber.

[0075] Through the limiting mechanism 40 of this embodiment, after assembly, the limiting force on the pull rod 202 can be adjusted by adjusting the position of the limiting screw 44, thereby obtaining different limiting effects. In addition, since the limiting screw 44 is parallel to the normal direction of the hinged end of the pull rod 20, the limiting force is uniform regardless of whether the pull rod 20 rotates clockwise or counterclockwise, which can improve the user experience.

[0076] Embodiment 4:

[0077] As an improved solution of the above embodiment, the difference between this embodiment and the above embodiment is that the locking module 55 in the locking device 52 of this embodiment provides another implementation method. Similarly, the locking module 55 deforms when heated, releases the limit shaft 54, and the limit shaft 54 ​​falls into the first slide groove 53, so that the sliding mechanism 30 can slide freely on the first slide groove 54 without being affected by the limit shaft. For details, please refer to Figure 7 The locking module 55 includes a temperature sensing unit 551 and a pushing piece 552. The pushing piece 552 abuts against the limiting shaft 54. The contact surface between the pushing piece 552 and the limiting shaft 54 ​​is an inclined surface, so that the limiting shaft 54 ​​can be more stably fixed in the bayonet 56. One end of the temperature sensing unit 551 is directly or indirectly fixed to the driving mechanism body, specifically the storage slot 57, and the other end abuts against the pushing piece 552.

[0078] In this embodiment, the temperature sensing unit 551 is a fusible metal, and its contact surface with the pushing member 552 is also designed with an inclined structure, which makes it easier to adjust the pressure on the pushing member 552. In terms of fixing with the driving mechanism body, a crossbeam 553 is set up between the two sides of the storage slot 57, and the crossbeam 553 abuts against the temperature sensing element 551 to prevent the temperature sensing element 551 from moving along the sliding direction of the sliding mechanism 30. At the same time, a screw structure 554 is inserted into one side of the storage slot 57, and the end of the screw structure 554 pushes the temperature sensing element 551. Due to the effect of the inclined surface, the temperature sensing element 551 forces the pushing member 552 to further abut against the limit column 54, preventing the limit column 54 from entering the first slide groove 53, thereby completing the locking.

[0079] When a fire occurs, the temperature sensing element 551 is deformed or melted due to heat, and the push member 552 loses the support force of the temperature sensing element 551 and cannot prevent the limit column 54 from entering the first slide groove 53, and the lock is released. The sliding mechanism 30 enters the second motion state.

[0080] Embodiment 5:

[0081] As an improved solution of the above-mentioned embodiment, the difference between this embodiment and the above-mentioned embodiment is that a tension adjustment slider is further provided at the end of the pull rod in this embodiment.

[0082] The ends of the pull rods in the present invention are connected to the windows. The pull rods drive the window to close during rotation. Since the positions of the rotation axis of the pull rod and the rotation axis of the window are different, a sliding block needs to be provided at the end of the pull rod and embedded in the slide groove at the edge of the window to achieve the driving. The greater the damping between the sliding block and the window, the better the windproof effect. However, when a fire occurs, the window needs to be closed quickly, and this damping is a factor that hinders the window from closing, so it needs to be cancelled when a fire occurs.

[0083] Specifically, the tension adjustment slider of this embodiment is used to solve the above-mentioned technical problems and at the same time enhance the wind resistance of the structure of the aforementioned embodiment.

[0084] See also Figure 8 and Fig. 9 , Figure 8 The structural principle of the tension adjustment slider is shown in the figure. Fig. 9The diagram shows the state of the expansion slot 61 after expansion. The tension adjustment slider is hinged to the end of the pull rod. The tension adjustment slider is movably mounted on a preset window sliding track. An expansion slot 61 is provided on the tension adjustment slider along the movement direction, and a clearance portion is provided at the end of the expansion slot 61 for placing a temperature sensing element 62. After the temperature sensing element is placed in the expansion slot 61, it is pushed into the expansion slot 61 and fits into the expansion slot 61 with interference fit, thereby expanding the width of the expansion slot 61, thereby increasing the width of the tension adjustment slider and increasing the friction between the tension adjustment slider and the sliding track.

[0085] It can be understood that the temperature sensing element 62 in this embodiment is preferably a fusible metal, which will soften when encountering high temperature. After softening, the expansion groove 61 has no force to support its expansion, so that the friction between the tension adjustment slider and the window sliding track is greatly reduced, achieving the technical effect of not hindering emergency closing.

[0086] In order to further facilitate installation, the tension adjustment slider also includes a push piece 63 arranged parallel to the movement direction of the tension adjustment slider. The push piece 63 is screwed to the end of the tension adjustment slider and pushes the temperature sensing element 62 into the expansion groove 61. In this embodiment, the push piece 63 is arranged at one end of the expansion groove 61 where the air avoidance portion is located, and it is screwed into the expansion groove 61 from the end along the slide direction. During the installation process, the temperature sensing element 62 is pre-placed in the air avoidance portion. As the push piece 63 is screwed in, the temperature sensing element 62 will be gradually pushed into the expansion groove 61, causing the expansion groove 61 to expand. At the same time, the push piece 63 also ensures that the temperature sensing element 62 will not easily slide out of the expansion groove 61. In addition, the temperature sensing element 62 can be gradually pushed up regularly to gradually penetrate into the expansion groove 61 to solve the problem of aging or wear of the expansion groove 61.

[0087] Embodiment 6:

[0088] As an improved solution of the above-mentioned embodiment 5, the difference between this embodiment and embodiment 5 is: Fig.10 In this embodiment, the original part embedded in the expansion groove 61 is set as a hard embedding pin 65. The embedding pin 65 is a nail-shaped structure, with a card table extending from the rear end and a pointed structure at the front end for easy embedding. The embedding pin 65 passes through a compression spring 64 and then is inserted into the expansion groove 61 with interference fit. After being inserted into the expansion groove 61, the overall width of the tension adjustment slider is expanded.

[0089] Due to the effect of elastic force, the embedded pin 65 will be pushed out of the expansion slot 61 by the compression spring 64 in the absence of obstacles. In order to prevent the embedded pin 65 from being ejected under normal circumstances, a push-out member 63 is provided at the end of the tension adjustment slider near the rear end of the embedded pin 65, and the rear end surface of the embedded pin 65 abuts against the push-out member 63 through a temperature sensing element to compress the compression spring 64.

[0090] Preferably, the temperature sensing element 62 may be, but is not limited to, a temperature sensing glass ball.

[0091] When a fire occurs, the temperature sensing element 62 is retracted, broken or deformed, the embedded pin 65 loses its supporting force and is pushed out by the compression spring 64, the width of the tension adjustment slider becomes narrower, and the friction between the tension adjustment slider and the window sliding track is greatly reduced, achieving the technical effect of not hindering emergency closing.

[0092] It can be understood that different implementations of the various components in the above embodiments can be implemented in combination, and the embodiments are only intended to illustrate the implementation methods of specific structures and are not intended to be a limitation on the implementation of the solutions.

[0093] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A door and window closer, characterized in that: It includes a mounting seat, a pull rod, a sliding mechanism, a limiting mechanism and a driving mechanism; The pull rod is hingedly mounted on the mounting seat and a gear structure is provided at the edge of the hinged end; The sliding mechanism is movably connected to the mounting seat and includes the limiting mechanism and the row of teeth arranged along the moving direction; the sliding mechanism can be transformed from the first moving state to the second moving state under the driving of the driving mechanism; When in the first motion state, the limiting mechanism is limitedly connected to the hinged end of the pull rod; when in the second motion state, the pull rod is separated from the limiting mechanism and the row of teeth is engaged with the hinged end of the pull rod, so that the pull rod rotates; The driving mechanism locks the sliding mechanism within a specific ambient temperature, and drives the sliding mechanism to change from the first motion state to the second motion state above the specific ambient temperature; the gear structure is sleeved on the hinge shaft of the pull rod and the mounting seat and is located between the pull rod and the sliding mechanism, and the gear structure and one end face edge of the pull rod extend a toggle member vertically, and the gear structure is engaged with the row of teeth; the limiting mechanism includes a limiting screw and a screw bracket extending upward perpendicular to the plane of the sliding mechanism, a limiting screw hole is provided on the screw bracket, and the limiting screw spirally passes through the limiting screw hole and abuts against the edge of the hinge end of the pull rod.

2. The door and window closer according to claim 1, characterized in that: A damping ring is arranged between the pull rod and the gear structure; a damping layer is arranged on the side of the toggle member, and the damping layer abuts against the edge of the pull rod.

3. The door and window closer according to claim 1, characterized in that: The limiting mechanism is arranged at a first end of the sliding mechanism, the row of teeth is arranged at a middle section of the sliding mechanism, and the driving mechanism is connected to a second end opposite to the first end.

4. The door and window closer according to claim 1, characterized in that: The row of teeth is arranged at a first end of the sliding mechanism, the limiting mechanism is arranged at a middle section of the sliding mechanism, and the driving mechanism is connected to a second end opposite to the first end.

5. The door and window closer according to claim 3 or 4, characterized in that: The driving mechanism includes a driving member and a locking device, one end of the driving member is fixedly arranged, and the other end is connected to the second end of the sliding mechanism, so that the driving member is in a potential accumulation state in the first motion state; the locking device includes a first slide groove, a limit shaft, and a locking module extending from the middle section of the sliding mechanism to the second end; one end of the first slide groove has a bayonet, and the limit shaft is fixed to the mounting seat after passing through the bayonet, and the locking module abuts against the limit shaft to limit the limit shaft from falling into the first slide groove; the locking module releases the limit shaft after being heated, and the limit shaft falls into the first slide groove, so that the sliding of the sliding mechanism is not affected by the limit shaft.

6. The door and window closer according to claim 5, characterized in that: The locking module includes a temperature sensing unit and a pushing piece, the pushing piece abuts against the limit shaft to fix the limit shaft in the bayonet, one end of the temperature sensing unit is directly or indirectly fixed to the driving mechanism body, and the other end abuts against the pushing piece.

7. The door and window closer according to claim 6, characterized in that: A damping member is provided at the abutment portion between the limit screw and the pull rod.

8. The door and window closer according to claim 1, characterized in that: The gear structure is arranged around the edge of the hinged end of the pull rod, and the limiting mechanism includes a limiting spring sheet, a first end of which is fixed to the sliding mechanism, and a second end abuts against the edge of the hinged end of the pull rod, and a protrusion facing the pull rod is provided at the abutting point.

9. The door and window closer according to claim 8, characterized in that: The limiting mechanism further comprises an eccentric screw, which is threadedly connected to the sliding mechanism and abuts against the back surface of the second end of the limiting spring sheet.

10. The door and window closer according to claim 5, characterized in that: The driving mechanism also includes a long strip of storage trough body, which is a U-shaped trough body or a square tube trough, and the storage trough body is clamped with the mounting seat. A screw hole is provided on one side wall of the storage trough body. After the locking screw is screwed through the screw hole, it abuts against the first side of the locking module, and the second side surface of the locking module opposite to the first side abuts against the side wall of the limiting shaft.

11. The door and window closer according to claim 1, characterized in that: The mounting seat, the sliding mechanism and the pull rod are stacked in sequence; the sliding mechanism is provided with a second sliding groove to avoid the hinge axis between the pull rod and the mounting seat.

12. The door and window closer according to claim 11, characterized in that: A clearance portion is disposed at one end of the second sliding slot close to the limiting mechanism, and the clearance portion is located at a side away from the row of teeth.

13. The door and window closer according to claim 1, characterized in that: The row of teeth is teeth, recessed holes or through holes arranged along the moving direction of the sliding mechanism.

14. The door and window closer according to claim 1, characterized in that: The end of the pull rod is hinged to the tension adjustment slider, and the tension adjustment slider is movably installed on a preset window sliding track; an expansion groove is opened on the tension adjustment slider along the movement direction, and a temperature sensing element is inserted in the expansion groove to expand the width of the tension adjustment slider; the tension adjustment slider also includes a push piece arranged parallel to the movement direction of the tension adjustment slider, and the push piece is screwed on the end of the tension adjustment slider and pushes the temperature sensing element into the expansion groove.

15. The door and window closer according to claim 1, characterized in that: The end of the pull rod is hinged to the tension adjustment slider, and the tension adjustment slider is movably installed on a preset window sliding track; an expansion groove is opened on the tension adjustment slider along the movement direction, and an embedding pin is inserted in the expansion groove for interference fit to expand the width of the tension adjustment slider; the rear end of the embedding pin extends into a card table, and the front end passes through the compression spring and is embedded in the expansion groove; a push piece is provided at the end of the tension adjustment slider near the rear end of the embedding pin, and the rear end face of the embedding pin abuts against the push piece through a temperature sensing element to compress the compression spring.

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