Tensioner, door and window leaf, and door and window

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 tensioning member, second tensioning member, connecting piece and elastic member, first tensioning member is used to connect with the first end of flexible transmission structure, flexible transmission structure is used to around the outer periphery of fan body, second tensioning member is used to connect with the second end of flexible transmission structure, second end and first end are located at the same side of fan body, the direction from second end to first end is tension direction, connecting piece includes oppositely arranged connecting portion and limiting portion, connecting portion is connected with first tensioning member, the two ends of elastic member along tension direction respectively with the side of limiting portion towards first tensioning member and the side of second tensioning member deviating from first tensioning member abut, elastic member is along tension direction compression state, the tensioner can make flexible transmission structure restore the state being pulled tight.

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] In the prior art, the door and window sash is equipped with movable hardware such as a transmission shell and a locking rod that reciprocate on the outer wall of the frame. An aluminum rod connects two adjacent movable hardware components, and the transmission between the two adjacent movable hardware components is realized through the aluminum rod.

[0003] In practical applications, the collision and friction between the aluminum rod and the outer wall of the frame generates significant noise, affecting the user experience. Replacing the aluminum rod with a flexible component—that is, connecting each end of the flexible component to two movable hardware parts—can significantly reduce noise. However, after long-term use, the flexible component is prone to elongation due to plastic deformation, leading to problems with incomplete transmission.

[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 a variable-length flexible transmission structure to a taut state.

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

[0007] Tensioner, including:

[0008] The first tensioning member is used to connect to the first end of the flexible transmission structure, which is used to be wound around the outer periphery of the fan body.

[0009] The second tensioning member 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.

[0010] A connector, comprising a connecting portion and a limiting portion disposed opposite to each other, wherein the connecting portion is connected to the first tensioning member;

[0011] The elastic element has two ends along the tensioning direction that abut against the side of the limiting part facing the first tensioning part and the side of the second tensioning part away from the first tensioning part, respectively. The elastic element is in a compressed state along the tensioning direction.

[0012] Optionally, the connecting part is detachably connected to the first tensioner.

[0013] Optionally, one of the connecting part and the first tensioning member is provided with a first threaded hole, and the other is provided with a first external thread, wherein the first threaded hole and the first external thread are threadedly engaged.

[0014] Optionally, the axis of the first threaded hole is parallel to the tensioning direction.

[0015] Optionally, the connector further includes a guide portion, the two ends of which are connected to the connecting portion and the limiting portion respectively. The second tensioning member is provided with a mating hole, the axis of which is parallel to the tensioning direction. The guide portion is movably inserted into the mating hole in a direction parallel to the tensioning direction, and the hole wall of the mating hole slides into the outer wall of the guide portion.

[0016] Optionally, the elastic element is provided in the guide section.

[0017] Optionally, the tensioner further includes a first connecting structure and a second connecting structure, wherein the first tensioning member is detachably connected to the first end through the first connecting structure, and the second tensioning member is detachably connected to the second end through the second connecting structure.

[0018] Optionally, the first connection structure includes a first insertion hole and a first clamping member. The first insertion hole is formed on the first tensioning member and is used to receive the first end. The first clamping member is detachably inserted into the first tensioning member and is configured to cooperate with the wall of the first insertion hole to clamp the first end.

[0019] And / or, the second connection structure includes a second insertion hole and a second clamping member, the second insertion hole being formed on the second tensioning member for receiving a second end, the second clamping member being detachably inserted through the second tensioning member, and the second clamping member being configured to engage with the wall of the second insertion hole to clamp the second end.

[0020] 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.

[0021] To achieve this objective, the present invention adopts the following technical solution:

[0022] A door / window sash includes a sash body, a flexible transmission structure, movable parts, and the aforementioned tensioner. The flexible transmission structure is arranged around the outer periphery of the sash body and is movably connected to the sash body along the 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 tensioner, and the second end is connected to a second tensioner.

[0023] 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.

[0024] To achieve this objective, the present invention adopts the following technical solution:

[0025] Doors and windows, including the aforementioned door and window sashes.

[0026] The beneficial effects of this utility model are:

[0027] The tensioner provided by this utility model has an elastic element in a compressed state along the tensioning direction. That is, the side of the limiting part facing the first tensioning element and the side of the second tensioning element away from the first tensioning element always apply a compressive force parallel to the tensioning direction to the elastic element. When the flexible transmission structure becomes longer due to plastic deformation, the compressive force decreases, allowing the elastic element to rebound in a direction parallel to the tensioning direction. The rebounding elastic element compresses the second tensioning element to move towards the first tensioning element, thereby tightening the flexible transmission structure and restoring it to a tightened state. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the door and window sash provided in Embodiment 1 of this utility model;

[0029] Figure 2 This is a schematic diagram of the tensioner provided in Embodiment 1 of this utility model;

[0030] Figure 3 This is a cross-sectional structural schematic diagram of the tensioner provided in Embodiment 1 of this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the door and window sash provided in Embodiment 2 of this utility model.

[0032] In the picture:

[0033] 1. Tensioner; 21. First end; 22. Second end; 23. Third end; 24. Fourth end; 25. First flexible transmission component; 26. Second flexible transmission component; 3. Fan body; 41. Transmission housing; 42. Locking rod; 43. Side pressure pulley; 44. Side pressure pulley; 45. Side pressure hook lock;

[0034] 100, First tensioning member; 200, Second tensioning member; 300, Connecting member; 310, Connecting part; 320, Limiting part; 330, Guide part; 400, Elastic member; 510, First insertion hole; 520, First clamping member; 530, Second threaded hole; 610, Second insertion hole; 620, Second clamping member; 630, Third threaded hole. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Example 1

[0040] 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 moving parts, thus improving transmission accuracy.

[0041] like Figure 1As shown, the door / window sash includes a sash body 3, a flexible transmission structure, movable parts, and the aforementioned tensioner 1. The flexible transmission structure includes a first flexible transmission element 25. Exemplarily, the first flexible transmission element 25 can be a component with certain flexibility, such as a steel rope, aluminum rope, steel belt, aluminum belt, or synchronous belt. The first flexible transmission element 25 is wound around the outer periphery of the sash body 3 and is movably connected to the sash body 3 along its circumference, meaning the first flexible transmission element 25 can rotate clockwise or counterclockwise along the circumference of the sash body 3. The number of movable parts is... At least two, for example, the number of moving parts can be two, three or more, all of which are connected to the first flexible transmission member 25 so that all moving parts are driven through the first flexible transmission member 25. The first flexible transmission member 25 includes a first end 21 and a second end 22, which are located on the same side of the sash body 3. The first end 21 is connected to the first tensioning member 100 of the tensioner 1, and the second end 22 is connected to the second tensioning member 200 of the tensioner 1, thereby causing the tensioner 1 to tighten the first flexible transmission member 25. This door and window sash uses the first flexible transmission member 25 to realize the transmission connection between the moving parts. Because the first flexible transmission member 25 has a certain degree of flexibility, the noise is small when the first flexible transmission member 25 bumps and rubs against the sash body 3, thus achieving the effect of noise reduction and improving the user experience. Furthermore, when the first flexible transmission member 25 becomes longer due to plastic deformation, it can be tightened by the tensioner 1, allowing it to return to its tightened state, thus providing a strong guarantee for the transmission accuracy between the moving parts.

[0042] In this embodiment, the movable parts include components such as transmission housing 41, locking rod 42, side-pressure pulley 43, side-pressure pulley 44 or side-pressure hook lock 45, which reciprocate on the fan body 3 and need to transmit power to each other. Taking transmission housing 41 and locking rod 42 as examples, both transmission housing 41 and locking rod 42 are connected to the first flexible transmission member 25. When the first flexible transmission member 25 moves along the circumference of the fan body 3, transmission housing 41 and locking rod 42 move synchronously with the first flexible transmission member 25, thereby realizing the transmission between transmission housing 41 and locking rod 42.

[0043] 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.

[0044] like Figures 1 to 3As shown, the tensioner 1 includes a first tensioning member 100, a second tensioning member 200, a connecting member 300, and an elastic member 400. The first tensioning member 100 is used to connect to the first end 21 of the first flexible transmission member 25, and the second tensioning member 200 is used to connect to the second end 22 of the first flexible transmission member 25. The direction from the second end 22 to the first end 21 is the tensioning direction (i.e., the Z1 direction). The connecting member 300 includes a connecting part 310 and a limiting part 320 disposed opposite to each other. The connecting part 310 is connected to the first tensioning member 100. The two ends of the elastic member 400 along the tensioning direction respectively abut against the side of the limiting part 320 facing the first tensioning member 100 and the side of the second tensioning member 200 away from the first tensioning member 100. The elastic member 400 is in a compressed state along the tensioning direction. The elastic member 400 can be a spring or rubber or other elements with a certain elasticity.

[0045] Based on the above design, the elastic element 400 is in a compressed state along the tension direction. That is, the first flexible transmission element 25 is in a tensioned state on the outer periphery of the fan body 3. At this time, the limiting part 320 on the side facing the first tensioning element 100 and the second tensioning element 200 on the side away from the first tensioning element 100 always apply a compressive force parallel to the tension direction to the elastic element 400, so that the elastic element 400 has elastic potential energy. When the first flexible transmission element 25 becomes longer due to plastic deformation, the compressive force decreases, so that the elastic element 400 can rebound in a direction parallel to the tension direction (i.e., the elastic element 400 releases elastic potential energy). The rebounding elastic element 400 squeezes the second tensioning element 200 to move towards the first tensioning element 100, so that the first flexible transmission element 25 is tightened again, thereby restoring the first flexible transmission element 25 to the state of being kept taut.

[0046] Optionally, the connecting part 310 is detachably connected to the first tensioning member 100. In practical applications, when the connecting member 300 or the first tensioning member 100 is damaged and needs to be replaced, the connecting part 310 and the first tensioning member 100 can be disassembled, and the damaged part can be replaced, saving the need to replace the entire tensioner 1 and reducing maintenance costs. Furthermore, in actual production, the connecting part 300 and the first tensioning member 100 can be manufactured and processed separately, and then assembled together, which helps reduce production difficulty and costs. Of course, in other embodiments, the connecting part 310 and the first tensioning member 100 can also be a fixedly connected structure.

[0047] Furthermore, the connecting part 310 is provided with a first external thread, and the first tensioning member 100 is provided with a first threaded hole. The first threaded hole and the first external thread are threadedly engaged, thereby enabling the connecting part 310 and the first tensioning member 100 to be assembled and disassembled by screwing on the connecting member 300. In another embodiment, the connecting part 310 is provided with a first threaded hole, and the first tensioning member 100 is provided with a protrusion. The protrusion is provided with a first external thread, and the first threaded hole and the first external thread are threadedly engaged, thereby enabling a detachable connection between the connecting part 310 and the first tensioning member 100. Of course, in other embodiments, the detachable connection between the connecting part 310 and the first tensioning member 100 can also be achieved through other structures. For example, the first tensioning member 100 is provided with a slot, and the connecting part 310 is provided with a protruding insert, which is detachably inserted into the slot.

[0048] Furthermore, since the axis of the first threaded hole is parallel to the tensioning direction, when the connector 300 is screwed on, the first tensioning member 100 and the second tensioning member 200 will move in directions closer to or further apart from each other, thereby adjusting the tension of the first flexible transmission member 25. For example, when the elasticity of the elastic member 400 fails and the first flexible transmission member 25 becomes longer, screwing on the connector 300 causes the first tensioning member 100 and the second tensioning member 200 to move in directions closer to each other, thus tightening the first flexible transmission member 25. When the first flexible transmission member 25 is too tight, screwing on the connector 300 in the opposite direction causes the first tensioning member 100 and the second tensioning member 200 to move in directions further apart from each other, thus slightly loosening the first flexible transmission member 25 and preventing it from breaking due to excessive tightness. When assembling the first flexible transmission component 25 and the fan body 3, the first flexible transmission component 25 is first fitted onto the outer periphery of the fan body 3. At this time, the first flexible transmission component 25 is in a relatively loose state. Then, the connecting component 300 is screwed to tighten the first flexible transmission component 25 and compress the elastic component 400, so that the elastic component 400 stores elastic potential energy. This can reduce the assembly difficulty of the first flexible transmission component 25 and the fan body 3.

[0049] Optionally, the connector 300 further includes a guide portion 330, with both ends of the guide portion 330 connected to the connector 310 and the limiting portion 320, respectively. The second tensioning member 200 is provided with a mating hole, the axis of which is parallel to the tensioning direction. The guide portion 330 is movably inserted into the mating hole in a direction parallel to the tensioning direction, and the wall of the mating hole slides against the outer wall of the guide portion 330. When the elastic member 400 rebounds to move the second tensioning member 200 toward the first tensioning member 100, the guide portion 330 can guide the second tensioning member 200, reducing the probability of the second tensioning member 200 deviating during movement. This provides a strong guarantee for the reliability of the tensioner 1 in tightening the first flexible transmission member 25. On the other hand, this structural design makes the overall structure of the tensioner 1 more compact, which is beneficial for reducing the overall volume of the tensioner 1 and making it applicable to installation environments with limited space.

[0050] Furthermore, the elastic element 400 is sleeved on the guide portion 330 so that the guide portion 330 acts as a radial limit for the elastic element 400, preventing the elastic element 400 from undergoing radial deformation, and providing a strong guarantee for the reliability of the tensioner 1 in tightening the first flexible transmission element 25.

[0051] In this embodiment, the connector 300 is a standard part with external threads and a nut, such as a screw or bolt. Taking a screw as an example, the nut is the limiting part 320, and the side opposite to the nut is the connecting part 310. The external thread in this area is the first external thread, and the area between the nut and the first external thread is the guide part 330. The external thread of the guide part 330 slides with the hole wall of the mating hole.

[0052] In this embodiment, the nut of the connector 300 has an internal hexagonal groove, so when tightening the connector 300, an internal hexagonal wrench can be inserted into the internal hexagonal groove to tighten it, reducing the difficulty of operation.

[0053] Optionally, the tensioner 1 also includes a first connecting structure and a second connecting structure. The first tensioning member 100 is detachably connected to the first end 21 through the first connecting structure, and the second tensioning member 200 is detachably connected to the second end 22 through the second connecting structure. When the first flexible transmission member 25 is damaged and needs to be replaced, the detachable connecting structure can reduce the difficulty and cost of maintenance.

[0054] Furthermore, the first connection structure includes a first insertion hole 510 and a first clamping member 520. The first insertion hole 510 is formed on the first tensioning member 100 and is used to accommodate the first flexible transmission member 25 at the first end 21. The first clamping member 520 is detachably inserted into the first tensioning member 100 and is configured to cooperate with the hole wall of the first insertion hole 510 to clamp the first flexible transmission member 25 at the first end 21, thereby realizing a detachable connection between the first end 21 and the first tensioning member 100.

[0055] Furthermore, the first clamping member 520 is provided with a second external thread, and the first tensioning member 100 is provided with a second threaded hole 530. The second threaded hole 530 communicates with the first insertion hole 510, and the axis of the second threaded hole 530 is perpendicular to the axis of the first insertion hole 510. The second external thread engages with the second threaded hole 530 to achieve a detachable connection between the first clamping member 520 and the first tensioning member 100. Moreover, by screwing on the first clamping member 520, the first clamping member 520 can engage with the wall of the first insertion hole 510 to clamp or release the first flexible transmission member 25 at the first end 21, thus achieving a detachable connection between the first end 21 and the first tensioning member 100. This structural design is simple and helps reduce the assembly difficulty of the first flexible transmission member 25 and the first tensioning member 100.

[0056] In another embodiment, the first tensioning member 100 is provided with a first assembly hole, which communicates with the first insertion hole 510, and the axis of the first assembly hole is perpendicular to the axis of the first insertion hole 510. A first magnet is embedded in the hole wall of the first insertion hole 510 on the side away from the first assembly hole. A first iron piece is embedded in the end of the first clamping member 520 facing the first insertion hole 510. The first clamping member 520 is inserted into the first assembly hole and is in clearance fit with the first assembly hole. The first iron piece and the first magnet attract each other so that the first tensioning member 100 and the hole wall of the first insertion hole 510 cooperate to clamp the first flexible transmission member 25 at the first end 21.

[0057] In another embodiment, the first connecting structure includes a first hook and a first hanging ring. The first hook is connected to the first tensioner 100, and the first hanging ring is an annular structure formed by binding the first end 21 of the first flexible transmission member 25. The first hanging ring is hung on the first hook to achieve a detachable connection between the first tensioner 100 and the first end 21.

[0058] Optionally, the second connection structure includes a second insertion hole 610 and a second clamping member 620. The second insertion hole 610 is formed on the second tensioning member 200 and is used to accommodate the first flexible transmission member 25 of the second end 22. The second clamping member 620 is detachably inserted into the second tensioning member 200 and is configured to cooperate with the hole wall of the second insertion hole 610 to clamp the first flexible transmission member 25 of the second end 22, thereby realizing a detachable connection between the second end 22 and the second tensioning member 200.

[0059] Furthermore, the second clamping member 620 is provided with a third external thread, and the second tensioning member 200 is provided with a third threaded hole 630. The third threaded hole 630 communicates with the second insertion hole 610, and the axis of the third threaded hole 630 is perpendicular to the axis of the second insertion hole 610. The third external thread and the third threaded hole 630 are threadedly engaged to achieve a detachable connection between the second clamping member 620 and the second tensioning member 200. Moreover, by screwing on the second clamping member 620, the second clamping member 620 can engage with the wall of the second insertion hole 610 to clamp or release the first flexible transmission member 25 at the second end 22, thus achieving a detachable connection between the second end 22 and the second tensioning member 200. This structural design is simple and helps reduce the assembly difficulty of the second flexible transmission member 26 and the second tensioning member 200.

[0060] In another embodiment, the second tensioning member 200 is provided with a second assembly hole, which communicates with the second insertion hole 610, and the axis of the second assembly hole is perpendicular to the axis of the second insertion hole 610. A second magnet is embedded in the hole wall of the second insertion hole 610 on the side away from the second assembly hole. A second iron piece is embedded in the end of the second clamping member 620 facing the second insertion hole 610. The second clamping member 620 is inserted into the second assembly hole and is in clearance fit with the second assembly hole. The second iron piece and the second magnet attract each other so that the second tensioning member 200 and the hole wall of the second insertion hole 610 cooperate to clamp the first flexible transmission member 25 at the second end 22.

[0061] In another embodiment, the second connection structure includes a second hook and a second hanging ring. The second hook is connected to the second tensioner 200, and the second hanging ring is an annular structure formed by binding the second end 22 of the first flexible transmission member 25. The second hanging ring is hung on the second hook to achieve a detachable connection between the second tensioner 200 and the second end 22.

[0062] 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 sashes" refers to both door sashes and window sashes collectively; that is, it can refer to either door sashes or window sashes. Therefore, the tensioner 1 provided in this embodiment can be applied to both doors and windows.

[0063] Example 2

[0064] 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.

[0065] like Figure 4As shown, the flexible transmission structure includes a first flexible transmission element 25 and a second flexible transmission element 26. Exemplarily, the first flexible transmission element 25 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 26 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 25 is wound around and tightened on a part of the outer periphery of the fan body 3, and the second flexible transmission element 26 is wound around and tightened on another part of the outer periphery of the fan body 3. Both the first flexible transmission element 25 and the second flexible transmission element 26 are movably connected to the fan body 3 along the circumference of the fan body 3, that is, both the first flexible transmission element 25 and the second flexible transmission element 26 can move clockwise or counterclockwise along the circumference of the fan body 3.

[0066] Specifically, the first flexible transmission member 25 includes a first end 21 and a third end 23, and the second flexible transmission member 26 includes a second end 22 and a fourth end 24. The first end 21 and the second end 22 are located on the same side of the fan body 3, and the first end 21 is connected to the first tensioning member 100, the second end 22 is connected to the second tensioning member 200, and the third end 23 and the fourth end 24 are respectively connected to opposite sides of the same movable member. For example, in this embodiment, the third end 23 and the fourth end 24 are respectively connected to opposite sides of the transmission housing 41. Thus, the first flexible transmission member 25 is tensioned between the first tensioning member 100 and the transmission housing 41, and the second flexible transmission member 26 is tensioned between the second tensioning member 200 and the transmission housing 41. This means that although the first flexible transmission member 25 and the second flexible transmission member 26 are separate structures, they form a tensioned whole through the connection of the tensioner 1 and the transmission housing 41. This whole can rotate clockwise or counterclockwise along the circumference of the fan body 3. In other words, the first flexible transmission member 25 and the second flexible transmission member 26... The component 26 can move synchronously along the circumference of the fan body 3. For example, when the first flexible transmission component 25 moves clockwise along the circumference of the fan body 3, the second flexible transmission component 26 moves clockwise along the circumference of the fan body 3, and the moving speed of the second flexible transmission component 26 and the first flexible transmission component 25 is the same. When the first flexible transmission component 25 moves counterclockwise along the circumference of the fan body 3, the second flexible transmission component 26 moves counterclockwise along the circumference of the fan body 3, and the moving speed of the second flexible transmission component 26 and the first flexible transmission component 25 is the same.

[0067] The working principle of the tensioner 1 in this embodiment is briefly described below, as follows: Figure 4 As shown, the direction from the second end 22 to the first end 21 is considered the Z1 direction, that is, the tensioning direction is the Z1 direction.

[0068] During use, the limiting part 320 of the connector 300 facing the first tensioning member 100 and the second tensioning member 200 away from the first tensioning member 100 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). When the second flexible transmission member 26 becomes longer due to plastic deformation, the compressive force decreases, allowing the elastic member 400 to rebound in a direction parallel to the tensioning direction. The rebounding elastic member 400 compresses the second tensioning member 200 to move in the direction of the first tensioning member 100 (Z1 direction), that is, the second end 22 moves in the direction of the first end 21, so that the second flexible transmission member 26 is tightened again, thereby restoring the second flexible transmission member 26 to the tightened state.

[0069] When the first flexible transmission member 25 elongates due to plastic deformation, the reverse tension force applied by the third end 23 to the transmission housing 41 decreases (the transmission housing 41 applies a tension force to the first flexible transmission member 25, and the first flexible transmission member 25 applies a reverse tension force to the transmission housing 41), thus reducing the tension force applied by the transmission housing 41 to the fourth end 24. Consequently, the second flexible transmission member 26 is no longer tensioned but is in a relatively loose state. At this time, the compressive force decreases, and the elastic member 400 moves in a direction parallel to the tensioning direction. The elastic member 400 rebounds and pushes the second tension member 200 toward the first tension member 100 (Z1 direction), that is, the second end 22 moves toward the first end 21, so that the second flexible transmission member 26 is tightened again, thereby increasing the tension force applied by the fourth end 24 to the transmission shell 41, causing the transmission shell 41 to move toward the fourth end 24 (i.e., Z2 direction). After the transmission shell 41 moves, it will tighten the first flexible transmission member 25 again, so that the first flexible transmission member 25 returns to the tightened state.

[0070] It should be noted that other moving parts, such as locking rod 42 or side-pressing pulley 44, can also be connected between the third end 23 and the fourth end 24.

[0071] It should also be noted that when the flexible transmission structure includes three or more flexible transmission components, the tensioner 1 and the fan body 3 provided in this embodiment are also applicable. Taking three flexible transmission components as an example, the three flexible transmission components will be referred to as the first flexible transmission component 25, the second flexible transmission component 26, and the third flexible transmission component, respectively. The first flexible transmission component 25 includes a first end 21 and a third end 23, the second flexible transmission component 26 includes a second end 22 and a fourth end 24, and the third flexible transmission component includes a fifth end and a sixth end. The first end 21 and the second end 22 are located on the same side of the fan body 3. The first end 21 is connected to the first tensioner 100, the third end 23 is connected to one end of the first movable component, the other end of the first movable component is connected to the fifth end, and the sixth end is connected to one end of the second movable component. One end is connected to the fourth end 24, and the second end 22 is connected to the second tensioning member 200. This causes the first flexible transmission member 25 to be tensioned between the first tensioning member 100 and the first movable member, the second flexible transmission member 26 to be tensioned between the second tensioning member 200 and the second movable member, and the third flexible transmission member to be tensioned between the first movable member and the second movable member. Although the first flexible transmission member 25, the second flexible transmission member 26, and the third flexible transmission member are separate structures, they form a tensioned whole through the connection of the tensioner 1, the first movable member, and the second movable member. Therefore, when one of the first flexible transmission member 25, the second flexible transmission member 26, and the third flexible transmission member becomes longer due to plastic deformation, it can be restored to the tensioned state by the rebound action of the elastic member 400.

[0072] 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 tensioning member (100) is used to connect to the first end (21) of the flexible transmission structure, which is used to be arranged around the outer periphery of the fan body (3); The second tensioning member (200) is used to connect to the second end (22) of the flexible transmission structure. The second end (22) and the first end (21) are located on the same side of the fan body (3). The direction from the second end (22) to the first end (21) is the tensioning direction. A connector (300) includes a connecting portion (310) and a limiting portion (320) disposed opposite to each other, the connecting portion (310) being connected to the first tensioning member (100); The elastic element (400) has two ends along the tensioning direction that abut against the side of the limiting part (320) facing the first tensioning member (100) and the side of the second tensioning member (200) away from the first tensioning member (100), respectively. The elastic element (400) is in a compressed state along the tensioning direction.

2. The tensioner according to claim 1, characterized in that, The connecting part (310) is detachably connected to the first tensioning member (100).

3. The tensioner according to claim 2, characterized in that, One of the connecting part (310) and the first tensioning member (100) is provided with a first threaded hole, and the other is provided with a first external thread, wherein the first threaded hole and the first external thread are threadedly engaged.

4. The tensioner according to claim 3, characterized in that, The axis of the first threaded hole is parallel to the tensioning direction.

5. The tensioner according to any one of claims 1-4, characterized in that, The connector (300) further includes a guide portion (330), the two ends of which are connected to the connecting portion (310) and the limiting portion (320) respectively. The second tensioning member (200) is provided with a mating hole, the axis of which is parallel to the tensioning direction. The guide portion (330) is movably inserted into the mating hole in a direction parallel to the tensioning direction, and the hole wall of the mating hole slides in fit with the outer wall of the guide portion (330).

6. The tensioner according to claim 5, characterized in that, The elastic element (400) is sleeved on the guide portion (330).

7. The tensioner according to any one of claims 1-4, characterized in that, The tensioner (1) further includes a first connecting structure and a second connecting structure. The first tensioning member (100) is detachably connected to the first end (21) through the first connecting structure, and the second tensioning member (200) is detachably connected to the second end (22) through the second connecting structure.

8. The tensioner according to claim 7, characterized in that, The first connection structure includes a first insertion hole (510) and a first clamping member (520). The first insertion hole (510) is formed on the first tensioning member (100) and is used to accommodate the first end (21). The first clamping member (520) is detachably inserted through the first tensioning member (100) and is configured to cooperate with the hole wall of the first insertion hole (510) to clamp the first end (21). And / or, the second connection structure includes a second insertion hole (610) and a second clamping member (620), the second insertion hole (610) being formed on the second tensioning member (200) for receiving the second end (22), the second clamping member (620) being detachably inserted through the second tensioning member (200), and the second clamping member (620) being configured to engage with the wall of the second insertion hole (610) to clamp the second end (22).

9. A door or window sash, characterized in that, The device includes a fan body (3), a flexible transmission structure, movable parts, and a tensioner (1) as described in any one of claims 1-8. The flexible transmission structure is arranged around the outer periphery of the fan body (3) and is movably connected to the fan body (3) along the circumferential direction of the fan body (3). 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 (21) and a second end (22). The first end (21) and the second end (22) are located on the same side of the fan body (3). The first end (21) is connected to the first tensioner (100), and the second end (22) is connected to the second tensioner (200).

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

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