Tensioner, door and window leaf

Abstract

The utility model belongs to door and window technical field discloses a kind of tensioner, door and window fan and door and window, tensioner includes first connecting piece, second connecting piece, movable assembly, elastic part and third connecting piece, the first end and the second end of flexible transmission structure can be connected with first connecting piece and second connecting piece respectively, flexible transmission structure is used to around the outer periphery of the fan body of door and window fan, second end and first end are located in the same side of fan body, the direction of second end pointing to first end is tension direction, second connecting piece is equipped with movable cavity, movable assembly is movably arranged in movable cavity along the direction parallel to tension direction, the both ends of elastic part along tension direction respectively with movable cavity the inner wall of side towards first connecting piece and movable assembly abut, elastic part is compressed state along tension direction, the both ends of third connecting piece are connected with first connecting piece and movable assembly respectively, when flexible transmission structure is lengthened due to plastic deformation and other factors, the tensioner can make flexible transmission structure restore the state being tightened.

Description

Technical Field

[0001] This utility model relates to the field of door and window technology, and in particular to a tensioner, a door and window sash, and a door and window. Background Technology

[0002] The outer periphery of the door and window sash is equipped with movable hardware such as locking rods and transmission housings that can reciprocate on the sash. A transmission aluminum rod is usually connected between each pair of adjacent movable hardware, and the transmission connection between the movable hardware is realized through the transmission aluminum rod.

[0003] Since both the aluminum rod and the fan body are made of metal, the aluminum rod is prone to friction with the fan body as it moves along with the moving hardware, thus generating noise. However, if a flexible component is connected between two adjacent moving hardware components to achieve the transmission connection between them, the flexible component is prone to lengthening due to plastic deformation after a period of use, which reduces the transmission accuracy between the moving hardware components and causes transmission problems.

[0004] Therefore, there is an urgent need to propose a tensioner, a door / window sash, and a door / window to solve the above-mentioned technical problems. Utility Model Content

[0005] The first objective of this invention is to provide a tensioner that can restore the flexible transmission structure to a tensioned state when the flexible transmission structure becomes elongated due to factors such as plastic deformation.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Tensioner, including:

[0008] The first connector is used to connect to the first end of the flexible transmission structure, which is used to wrap around the outer periphery of the door / window sash.

[0009] The second connector is used to connect to the second end of the flexible transmission structure. The second end and the first end are located on the same side of the fan body. The direction from the second end to the first end is the tensioning direction. The second connector is provided with a movable cavity.

[0010] The movable component is movably disposed within the movable cavity in a direction parallel to the tensioning direction;

[0011] The elastic element has two ends along the tensioning direction that abut against the inner wall of the movable cavity on the side facing the first connecting member and the movable component, respectively. The elastic element is in a compressed state along the tensioning direction.

[0012] The third connector has one end connected to the first connector and the other end connected to the active component.

[0013] Optionally, the third connector is movably inserted through the second connector in a direction parallel to the tensioning direction, and the other end of the third connector is connected to the side of the movable component facing the first connector.

[0014] Optionally, one end of the third connector is detachably connected to the first connector, and the other end of the third connector is detachably connected to the movable component.

[0015] Optionally, one end of the third connector and one of the first connectors are provided with a first external thread, and the other end is provided with a first threaded hole, wherein the first external thread and the first threaded hole are threadedly engaged; the other end of the third connector and one of the movable components are provided with a second external thread, and the other end is provided with a second threaded hole, wherein the second external thread and the second threaded hole are threadedly engaged, and the first external thread and the second external thread have opposite directions of rotation.

[0016] Optionally, a clamping part is provided on the third connector, the clamping part being located between the first connector and the second connector, and the clamping part being polygonal.

[0017] Optionally, the elastic element is fitted onto the third connector.

[0018] Optionally, the tensioner further includes a first assembly structure and a second assembly structure, wherein the first connector is detachably connected to the first end via the first assembly structure, and the second connector is detachably connected to the second end via the second assembly structure.

[0019] Optionally, the first assembly structure includes a first assembly component, which is detachably connected to a first connector, and the first assembly component is configured to cooperate with the first connector to clamp a first end;

[0020] And / or, the second assembly structure includes a second assembly that is detachably connected to a second connector, and the second assembly is configured to engage with the second connector to clamp a second end.

[0021] The second objective of this invention is to provide a door / window sash that has low noise and high transmission precision between its moving parts.

[0022] To achieve this objective, the present invention adopts the following technical solution:

[0023] A door / window sash includes a sash body, a flexible transmission structure, movable parts, and the aforementioned tensioner. The flexible transmission structure is wound around the outer periphery of the sash body and is movably connected to the sash body along its circumference. There are at least two movable parts, all of which are connected to the flexible transmission structure. The flexible transmission structure includes a first end and a second end, which are located on the same side of the sash body. The first end is connected to a first connecting member, and the second end is connected to a second connecting member.

[0024] The third objective of this invention is to provide a door or window that has low noise and high transmission precision between its moving parts.

[0025] To achieve this objective, the present invention adopts the following technical solution:

[0026] Doors and windows, including the aforementioned door and window sashes.

[0027] The beneficial effects of this utility model are:

[0028] The direction from the second end of the flexible transmission structure to the first end is the tension direction. The elastic element is in a compressed state along the tension direction. Consequently, the inner wall of the movable cavity facing the first connector and the movable component always apply a compressive force parallel to the tension direction to the elastic element, allowing the elastic element to store a certain amount of elastic potential energy. When the flexible transmission structure becomes longer, the compressive force on the elastic element decreases, allowing the elastic element to release its elastic potential energy and rebound in a direction parallel to the tension direction. The rebounding elastic element applies a rebound force to the inner wall of the movable cavity facing the first connector. This rebound force causes the second connector to move towards the first connector. In other words, the second connector drives the second end of the flexible transmission structure to move towards the first end, thereby restoring the flexible transmission structure to its tensioned state. Attached Figure Description

[0029] Figure 1 This is an exploded structural diagram of the door and window sash provided in Embodiment 1 of this utility model;

[0030] Figure 2 This is a schematic diagram of the tensioner provided in Embodiment 1 of this utility model;

[0031] Figure 3 yes Figure 2 Enlarged view of a portion of point A in the middle;

[0032] Figure 4 This is an exploded structural diagram of the door and window sash provided in Embodiment 2 of this utility model.

[0033] In the picture:

[0034] 10. Tensioner; 20a. First end; 20b. Second end; 20c. Third end; 20d. Fourth end; 21. First flexible transmission component; 22. Second flexible transmission component; 30. Fan body; 41. Transmission housing; 42. Locking rod; 43. Tilting lock pin;

[0035] 100, First connector; 200, Second connector; 210, Movable cavity; 300, Movable component; 400, Elastic component; 500, Third connector; 510, Clamping part; 610, First assembly; 620, Second assembly; 630, Third assembly; 640, Fourth assembly. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] Example 1

[0041] This embodiment provides a tensioner, a door / window sash, and a door / window. The tensioner is used in both the door / window sash and the door / window, which can reduce noise and ensure effective transmission between the moving parts.

[0042] like Figure 1As shown, the door / window sash includes a sash body 30, a flexible transmission structure, movable parts, and the aforementioned tensioner 10. The flexible transmission structure is wound around the outer periphery of the sash body 30 and is movably connected to the sash body 30 along its circumference. That is, the flexible transmission structure can rotate clockwise or counterclockwise along the circumference of the sash body 30. The flexible transmission structure is in a tensioned state. The number of movable parts is at least two; for example, there can be two, three, or more movable parts. All movable parts are connected to the flexible transmission structure so that all movable parts are driven through the flexible transmission structure. The flexible transmission structure includes a first end 20a and a second end 20b, located on the same side of the sash body 30. The first end 20a is connected to the first connecting member 100, and the second end 20b is connected to the second connecting member 200. This door sash uses a flexible transmission structure to achieve the transmission connection between the movable parts. Because the flexible transmission structure has a certain degree of flexibility, the noise is relatively small when the flexible transmission structure collides and rubs against the sash body 30, thereby achieving the effect of noise reduction and improving the user experience. Furthermore, when the flexible transmission structure becomes longer due to factors such as plastic deformation, the flexible transmission structure can be tightened by the tensioner 10, so that the flexible transmission structure can return to the tightened state, thereby providing a strong guarantee for the transmission accuracy between various moving parts.

[0043] In this embodiment, the flexible transmission structure includes a first flexible transmission component 21. Exemplarily, the first flexible transmission component 21 can be a component with certain flexibility, such as a steel rope, aluminum rope, steel belt, aluminum belt, or synchronous belt. In this embodiment, there are two first flexible transmission components 21. Of course, in other embodiments, there can be one, three, or four, or other quantities of first flexible transmission components 21. In this embodiment, the moving parts include a transmission housing 41, a locking rod 42, and a tilting locking pin 43, which reciprocate on the fan body 30 and require mutual transmission.

[0044] The doors and windows provided in this embodiment include the aforementioned door and window sashes, which have low noise and high transmission accuracy between moving parts.

[0045] like Figures 1 to 3As shown, the tensioner 10 provided in this embodiment includes a first connector 100, a second connector 200, a movable component 300, an elastic component 400, and a third connector 500. The first connector 100 is used to connect to the first end 20a of the first flexible transmission component 21, which is wound around the outer periphery of the fan body 30. The second connector 200 is used to connect to the second end 20b of the first flexible transmission component 21. The second end 20b and the first end 20a are located on the same side of the fan body 30. The direction of b pointing to the first end 20a is the tensioning direction. The second connector 200 is provided with a movable cavity 210. The movable component 300 is movably disposed in the movable cavity 210 in a direction parallel to the tensioning direction. The two ends of the elastic member 400 in the tensioning direction respectively abut against the inner wall of the movable cavity 210 on the side facing the first connector 100 and the movable component 300. The elastic member 400 is in a compressed state in the tensioning direction. One end of the third connector 500 is connected to the first connector 100, and the other end is connected to the movable component 300.

[0046] Based on the above design, the direction from the second end 20b of the first flexible transmission member 21 to the first end 20a is the tensioning direction, and the elastic member 400 is in a compressed state along the tensioning direction. Consequently, the inner wall of the movable cavity 210 facing the first connecting member 100 and the movable component 300 constantly apply a compressive force parallel to the tensioning direction to the elastic member 400, allowing the elastic member 400 to store a certain amount of elastic potential energy. When the first flexible transmission member 21 becomes longer, the compressive force on the elastic member 400 decreases, allowing the elastic member 400 to release its elastic potential energy and move along a direction parallel to the tensioning direction. The elastic element 400 rebounds in the direction of the first flexible transmission member 210 and applies a rebound force to the inner wall of the movable cavity 210 on the side facing the first connector 100. This rebound force causes the second connector 200 to move in the direction of the first connector 100. In other words, the second connector 200 drives the second end 20b of the first flexible transmission member 21 to move towards the first end 20a, thereby restoring the first flexible transmission member 21 to a taut state. This ensures that the moving parts connected to the first flexible transmission member 21 can effectively transmit power, thus improving the transmission accuracy between the moving parts.

[0047] In this embodiment, the elastic element 400 is a spring. In other embodiments, the elastic element 400 may also be rubber or other elements with a certain degree of elasticity.

[0048] Optionally, the third connector 500 is movably inserted through the second connector 200 in a direction parallel to the tensioning direction, and the other end of the third connector 500 is connected to the side of the movable component 300 facing the first connector 100. This structural design can reduce the volume required to assemble the movable component 300 and the third connector 500, making the overall structure of the tensioner 10 more compact, and thus enabling the tensioner 10 to be suitable for working conditions with limited installation space.

[0049] Furthermore, one end of the third connector 500 is detachably connected to the first connector 100, and the other end of the third connector 500 is detachably connected to the movable component 300, so that the first connector 100, the second connector 200 and the third connector 500 are of a split structure, which is not only easy to disassemble and assemble, but also easy to manufacture and process, and helps to reduce maintenance costs and production costs.

[0050] Furthermore, one end of the third connector 500 is provided with a first external thread, and the first connector 100 is provided with a first threaded hole, with the first external thread and the first threaded hole threadedly engaged; the other end of the third connector 500 is provided with a second external thread, and the movable component 300 is provided with a second threaded hole, with the second external thread and the second threaded hole threadedly engaged. The first external thread and the second external thread have opposite directions of rotation. Thus, the assembly of the third connector 500, the first connector 100 and the second connector 200 can be achieved by screwing the third connector 500.

[0051] Secondly, when the elastic element 400 loses its elasticity and the first flexible transmission element 21 becomes longer, the first connecting element 100 and the second connecting element 200 can be moved toward each other by twisting the third connecting element 500, thereby bringing the first end 20a and the second end 20b closer together, thus tightening the first flexible transmission element 21 and restoring it to a tightened state.

[0052] Furthermore, when assembling the first flexible transmission component 21 with the fan body 30, the relatively loose first flexible transmission component 21 can be first fitted onto the outer periphery of the fan body 30, and then the third connecting component 500 can be screwed on, so that the first connecting component 100 and the second connecting component 200 respectively drive the first end 20a and the second end 20b to move towards each other until the first flexible transmission component 21 is tightened and the elastic component 400 is compressed. Compared with directly fitting the relatively tight first flexible transmission component 21 onto the fan body 30, this structural design can greatly simplify the assembly difficulty and eliminate the step of accurately calculating the length of the first flexible transmission component 21 based on the perimeter of the fan body 30.

[0053] In this embodiment, the movable component 300 includes a movable plate and a nut (not shown in the figure). The movable plate is movably disposed in the movable cavity 210 in a direction parallel to the tensioning direction. The nut is fixed on the side of the movable plate facing the first connector 100. The other end of the third connector 500 is threadedly connected to the nut.

[0054] In this embodiment, the third connector 500 is a double-ended screw. Double-ended screws are a common standard part in the field. Using it as the third connector 500 helps to reduce production difficulty and production costs.

[0055] In another embodiment, one end of the third connector 500 is provided with a first threaded hole, and the first connector 100 is provided with a first protrusion with a first external thread, which is threadedly engaged with the first threaded hole; the other end of the third connector 500 is provided with a second threaded hole, and the movable component 300 includes a movable plate and a second protrusion protruding from the movable plate. The second protrusion is provided with a second external thread, which is threadedly engaged with the second threaded hole. The first external thread and the second external thread have opposite directions of rotation. Thus, the assembly of the third connector 500, the first connector 100 and the second connector 200 can be achieved by screwing, and the effect of tightening the first flexible transmission component 21 can also be achieved.

[0056] In another embodiment, the first connector 100 is provided with a first slot, and one end of the third connector 500 is detachably inserted into the first slot to achieve a detachable connection between the first connector 100 and the third connector 500. The movable component 300 includes a movable element in the shape of a plate, strip, or block, and the movable element is provided with a second slot. The other end of the third connector 500 is detachably inserted into the second slot to achieve a detachable connection between the other end of the third connector 500 and the movable component 300.

[0057] Optionally, a clamping part 510 is provided on the third connector 500. The clamping part 510 is located between the first connector 100 and the second connector 200. The clamping part 510 is prismatic in shape. For example, the clamping part 510 can be a triangular prism, a pentagonal prism or a hexagonal prism. In actual operation, tools such as wrenches can be clamped on the clamping part 510 to facilitate the screwing of the third connector 500.

[0058] Optionally, the elastic element 400 is sleeved on the third connector 500, so that the third connector 500 has a radial limiting effect on the elastic element 400, preventing the elastic element 400 from undergoing radial deformation.

[0059] Optionally, the tensioner 10 also includes a first assembly structure and a second assembly structure. The first connector 100 is detachably connected to the first end 20a through the first assembly structure, and the second connector 200 is detachably connected to the second end 20b through the second assembly structure. When the first flexible transmission component 21 is damaged and needs to be replaced, this detachable connection structure can reduce maintenance difficulty and cost.

[0060] Furthermore, the first assembly structure includes a first assembly 610 and a third assembly 630. The first connector 100 is provided with a third threaded hole, and the third assembly 630 is provided with a third external thread. The third assembly 630 is detachably inserted into the first assembly 610 and threadedly engaged with the third threaded hole, so that the first assembly 610 and the first connector 100 located on both sides of the first end 20a cooperate to clamp the first end 20a.

[0061] In another embodiment, a first magnet is embedded in the first assembly 610 and a second magnet is embedded in the first connector 100. The first magnet and the second magnet have opposite magnetic properties. The first assembly 610 and the first connector 100 are located on both sides of the first end 20a, so that the first assembly 610 and the first connector 100 clamp the first end 20a under the mutual attraction of the first magnet and the second magnet.

[0062] In another embodiment, the first assembly structure includes a first hook and a first hanging ring. The first hook is connected to the first connector 100, and the first hanging ring is an annular structure formed by binding the first end 20a of the first flexible transmission member 21. The first hanging ring is hung on the first hook to achieve a detachable connection between the first connector 100 and the first end 20a.

[0063] Optionally, the second assembly structure includes a second assembly 620 and a fourth assembly 640. The second connector 200 is provided with a fourth threaded hole, and the fourth assembly 640 is provided with a fourth external thread. The fourth assembly 640 is detachably inserted into the second assembly 620 and threadedly engaged with the fourth threaded hole, so that the second assembly 620 and the second connector 200 located on both sides of the second end 20b cooperate to clamp the second end 20b.

[0064] In another embodiment, a third magnet is embedded in the second assembly 620 and a fourth magnet is embedded in the second connector 200. The third magnet and the fourth magnet have opposite magnetic properties. The second assembly 620 and the second connector 200 are located on both sides of the second end 20b, so that the second assembly 620 and the second connector 200 clamp the second end 20b under the mutual attraction of the third magnet and the fourth magnet.

[0065] In another embodiment, the second assembly structure includes a second hook and a second hanging ring. The second hook is connected to the second connector 200, and the second hanging ring is an annular structure formed by binding the second end 20b of the first flexible transmission member 21. The second hanging ring is hung on the second hook to achieve a detachable connection between the second connector 200 and the second end 20b.

[0066] It should be noted that the term "doors and windows" refers to both doors and windows collectively; that is, it can refer to either doors or windows. Similarly, "door and window sash" refers to both door and window sashes; that is, it can refer to either door or window sashes. The term "sash body 30" refers to both door and window sash bodies; that is, it can refer to either door or window sash bodies. Therefore, the tensioner 10 provided in this embodiment can be applied to both doors and windows.

[0067] Example 2

[0068] This embodiment provides a door / window sash. The following mainly describes the differences between this embodiment and Embodiment 1, while the similarities will not be repeated.

[0069] like Figure 4 As shown, the flexible transmission structure includes a first flexible transmission element 21 and a second flexible transmission element 22. Exemplarily, the first flexible transmission element 21 can be a component with certain flexible characteristics, such as a steel rope, aluminum rope, steel belt, aluminum belt, or synchronous belt. The second flexible transmission element 22 can also be a component with certain flexible characteristics, such as a steel rope, aluminum rope, steel belt, aluminum belt, or synchronous belt. The first flexible transmission element 21 is wound around and tightened on a part of the outer periphery of the fan body 30, and the second flexible transmission element 22 is wound around and tightened on another part of the outer periphery of the fan body 30. Both the first flexible transmission element 21 and the second flexible transmission element 22 are movably connected to the fan body 30 along the circumference of the fan body 30, that is, both the first flexible transmission element 21 and the second flexible transmission element 22 can move clockwise or counterclockwise along the circumference of the fan body 30.

[0070] Specifically, the first flexible transmission member 21 includes a first end 20a and a third end 20c, and the second flexible transmission member 22 includes a second end 20b and a fourth end 20d. The first end 20a and the second end 20b are located on the same side of the fan body 30, and the first end 20a is connected to the first connector 100, the second end 20b is connected to the second connector 200, and the third end 20c and the fourth end 20d are respectively connected to opposite sides of the same movable member. For example, in this embodiment, the third end 20c and the fourth end 20d are respectively connected to opposite sides of the transmission housing 41. Thus, the first flexible transmission member 21 is stretched between the first connecting member 100 and the transmission shell 41, and the second flexible transmission member 22 is stretched between the second connecting member 200 and the transmission shell 41. Although the first flexible transmission member 21 and the second flexible transmission member 22 are separate structures, they form a stretched whole (i.e., a flexible transmission structure) through the connection of the tensioner 10 and the transmission shell 41. This whole can rotate clockwise or counterclockwise along the circumference of the fan body 30. That is, the first flexible transmission member 21 and the second flexible transmission member 22 can move synchronously along the circumference of the fan body 30.

[0071] The working principle of the tensioner 10 in this embodiment is briefly described below, as follows: Figure 4 As shown, the direction from the second end 20b to the first end 20a (i.e., the tensioning direction) is considered the Z1 direction.

[0072] When both the first flexible transmission member 21 and the second flexible transmission member 22 are in a tensioned state, that is, when neither the first flexible transmission member 21 nor the second flexible transmission member 22 has lengthened due to factors such as plastic deformation, the inner wall of the movable cavity 210 facing the first connecting member 100 and the movable component 300 always apply a compressive force parallel to the tensioning direction to the elastic member 400. For ease of understanding, this force will be referred to as the compressive force below.

[0073] When the second flexible transmission member 22 becomes longer due to factors such as plastic deformation, the compressive force decreases, and the elastic member 400 can release elastic potential energy and rebound in a direction parallel to the tensioning direction. The rebounding elastic member 400 applies a rebound force to the inner wall of the movable cavity 210 on the side facing the first connector 100. This rebound force causes the second connector 200 to move toward the first connector 100. In other words, the second connector 200 moves the second end 20b of the second flexible transmission member 22 toward the first end 20a of the first flexible transmission member 21, that is, the second end 20b moves in the Z1 direction, thereby causing the second flexible transmission member 22 to return to the tensioned state.

[0074] When the first flexible transmission member 21 lengthens due to factors such as plastic deformation, the reverse tension force applied by the third end 20c to the transmission housing 41 decreases (the transmission housing 41 and the tensioner 10 apply tension force to the first flexible transmission member 21, and the first flexible transmission member 21 applies a reverse tension force to the transmission housing 41). This reduces the tension force applied by the transmission housing 41 to the fourth end 20d of the second flexible transmission member 22, meaning the second flexible transmission member 22 is no longer tensioned between the transmission housing 41 and the tensioner 10. Consequently, the second flexible transmission member 22 becomes looser, which reduces the squeezing effect. The force causes the elastic element 400 to release its elastic potential energy and rebound in a direction parallel to the tensioning direction. The rebounding elastic element 400 applies a rebound force to the inner wall of the movable cavity 210 on the side facing the first connector 100. This rebound force causes the second connector 200 to move towards the first connector 100. That is, the second connector 200 moves the second end 20b of the second flexible transmission element 22 towards the first end 20a of the first flexible transmission element 21, i.e., the second end 20b moves in the Z1 direction, thereby causing the second flexible transmission element 22 to return to its tensioned state. After the second flexible transmission element 22 is tensioned again, the tensioning force applied by the fourth end 20d to the transmission housing 41 increases, causing the transmission housing 41 to move in the direction of the fourth end 20d, i.e., the transmission housing 41 moves in the Z2 direction. This increases the tensioning force of the transmission housing 41 on the third end 20c, thereby causing the first flexible transmission element 21 to be tensioned again.

[0075] In this embodiment, there are two of each of the first flexible transmission member 21 and the second flexible transmission member 22. In other embodiments, the number of the first flexible transmission member 21 and the second flexible transmission member 22 may be one, three or four, etc., and no specific limitation is made here.

[0076] In this embodiment, the transmission housing 41 is connected between the third end 20c and the fourth end 20d. In other embodiments, other moving parts such as the locking rod 42 or the tilting locking pin 43 can also be connected between the third end 20c and the fourth end 20d, which will not be listed here.

[0077] It should be noted that when the flexible transmission structure includes three or more flexible transmission components, the tensioner 10 and the fan body 30 provided in this embodiment are also applicable. Taking a flexible transmission structure including three flexible transmission components as an example, the three flexible transmission components are referred to as the first flexible transmission component 21, the second flexible transmission component 22, and the third flexible transmission component, respectively. The first flexible transmission component 21 includes a first end 20a and a third end 20c, the second flexible transmission component 22 includes a second end 20b and a fourth end 20d, and the third flexible transmission component includes a fifth end and a sixth end. The first end 20a and the second end 20b are located on the same side of the fan body 30. The first end 20a is connected to the first connecting member 100, the third end 20c is connected to one end of the first movable member, the other end of the first movable member is connected to the fifth end, the sixth end is connected to one end of the second movable member, the other end of the second movable member is connected to the fourth end 20d, and the second end 20b is connected to the second connecting member 200, thereby enabling the first flexible transmission component 21 to achieve the desired effect. The flexible transmission component 21 is stretched between the first connecting component 100 and the first movable component, the second flexible transmission component 22 is stretched between the second connecting component 200 and the second movable component, and the third flexible transmission component is stretched between the first movable component and the second movable component. Although the first flexible transmission component 21, the second flexible transmission component 22 and the third flexible transmission component are separate structures, they form a stretched whole (i.e., a flexible transmission structure) through the connection of the tensioner 10, the first movable component and the second movable component. Therefore, when one of the first flexible transmission component 21, the second flexible transmission component 22 and the third flexible transmission component becomes longer due to factors such as plastic deformation, it can be restored to the stretched state by the rebound action of the elastic component 400.

[0078] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A tensioner, characterized in that, include: The first connector (100) is used to connect to the first end (20a) of the flexible transmission structure, which is used to wrap around the outer periphery of the fan body (30) of the door and window sash. The second connector (200) is used to connect to the second end (20b) of the flexible transmission structure. The second end (20b) and the first end (20a) are located on the same side of the fan body (30). The direction of the second end (20b) pointing to the first end (20a) is the tensioning direction. The second connector (200) is provided with a movable cavity (210). A movable component (300) is movably disposed within the movable cavity (210) in a direction parallel to the tensioning direction; An elastic element (400) is provided, with its two ends along the tensioning direction abutting against the inner wall of the movable cavity (210) on the side facing the first connector (100) and the movable assembly (300), respectively. The elastic element (400) is in a compressed state along the tensioning direction. A third connector (500), one end of which is connected to the first connector (100) and the other end of which is connected to the active component (300).

2. The tensioner according to claim 1, characterized in that, The third connector (500) is movably inserted through the second connector (200) in a direction parallel to the tensioning direction, and the other end of the third connector (500) is connected to the side of the movable component (300) facing the first connector (100).

3. The tensioner according to claim 2, characterized in that, One end of the third connector (500) is detachably connected to the first connector (100), and the other end of the third connector (500) is detachably connected to the movable component (300).

4. The tensioner according to claim 3, characterized in that, One end of the third connector (500) and one of the first connector (100) are provided with a first external thread, and the other end is provided with a first threaded hole, wherein the first external thread is threadedly engaged with the first threaded hole; one end of the third connector (500) and one of the movable component (300) are provided with a second external thread, and the other end is provided with a second threaded hole, wherein the second external thread is threadedly engaged with the second threaded hole, and the first external thread and the second external thread have opposite directions of rotation.

5. The tensioner according to claim 4, characterized in that, The third connector (500) is fitted with a clamping part (510), which is located between the first connector (100) and the second connector (200). The clamping part (510) is prismatic in shape.

6. The tensioner according to any one of claims 2-5, characterized in that, The elastic element (400) is sleeved on the third connector (500).

7. The tensioner according to any one of claims 1-5, characterized in that, The tensioner (10) further includes a first assembly structure and a second assembly structure. The first connector (100) is detachably connected to the first end (20a) through the first assembly structure, and the second connector (200) is detachably connected to the second end (20b) through the second assembly structure.

8. The tensioner according to claim 7, characterized in that, The first assembly structure includes a first assembly (610), which is detachably connected to the first connector (100), and the first assembly (610) is configured to cooperate with the first connector (100) to clamp the first end (20a). And / or, the second assembly structure includes a second assembly (620) detachably connected to the second connector (200), and the second assembly (620) is configured to engage with the second connector (200) to clamp the second end (20b).

9. A door or window sash, characterized in that, The device includes a fan body (30), a flexible transmission structure, movable parts, and a tensioner (10) as described in any one of claims 1-8. The flexible transmission structure is arranged around the outer periphery of the fan body (30) and is movably connected to the fan body (30) along the circumferential direction of the fan body (30). The number of movable parts is at least two, and all movable parts are connected to the flexible transmission structure. The flexible transmission structure includes a first end (20a) and a second end (20b). The first end (20a) and the second end (20b) are located on the same side of the fan body (30). The first end (20a) is connected to the first connector (100), and the second end (20b) is connected to the second connector (200).

10. Doors and windows, characterized in that, Includes the door and window sashes as described in claim 9.

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