Tension adjusting device and door and window

Abstract

The utility model belongs to door and window technical field discloses a kind of tension adjusting device and door and window, the tension adjusting device includes adjusting piece, locking structure and two connecting structures, two connecting structures are used to be connected with the both ends of flexible transmission structure respectively, the both ends of flexible transmission structure are located in the same side of the fan of door and window, and the at least two movable pieces of door and window can be driven connection by flexible transmission structure, the both ends of adjusting piece are movably connected with two connecting structures respectively, so that two connecting structures can move along the direction of each other, locking structure is used to lock the relative position of adjusting piece and connecting structure, the tension adjusting device can be stretched flexible transmission structure re-tight, and further provide guarantee effect for the transmission precision between each movable piece on door and window.

Description

Technical Field

[0001] This utility model relates to the field of door and window technology, and in particular to a tension adjustment device and a door / window. Background Technology

[0002] Doors and windows are usually equipped with transmission hardware such as transmission housings and locking rods, and the transmission hardware is connected to each other through a transmission system.

[0003] Existing technology discloses a ring transmission system, including four rigid transmission rods and four flexible transmission components. The four rigid transmission rods are arranged along the four sides of a rectangular window sash, and the four flexible transmission components are located at the four corners of the rectangular window sash. Adjacent rigid transmission rods are connected by the flexible transmission components between them. However, after long-term use, the flexible transmission components are prone to elongation due to plastic deformation, thereby reducing transmission accuracy.

[0004] Therefore, there is an urgent need to propose a tension adjustment device 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 tension adjustment device that can re-tighten an elongated flexible transmission structure, thereby ensuring the transmission accuracy between various moving parts on doors and windows.

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

[0007] Tension adjustment device, including:

[0008] Two connecting structures are used to connect to the two ends of the flexible transmission structure respectively. The two ends of the flexible transmission structure are located on the same side of the door and window sash. At least two moving parts of the door and window can be connected by the flexible transmission structure.

[0009] An adjusting component, the two ends of which are movably connected to two connecting structures respectively, so that the two connecting structures can move in a direction facing each other;

[0010] The locking structure is used to lock the relative position of the adjusting component and the connecting structure.

[0011] Optionally, each of the two connecting structures is provided with an adjustment hole on one side facing each other. The axis of the adjustment hole is parallel to the direction in which the two connecting structures point to each other, and the two ends of the adjustment member are respectively movably set in one of the corresponding adjustment holes.

[0012] Optionally, the locking structure includes a first internal thread, a second internal thread, a first external thread, and a second external thread. The first internal thread and the second internal thread are respectively located on the hole walls of the adjustment holes of the two connecting structures. The first internal thread and the second internal thread have opposite directions of rotation. The first external thread and the second external thread are respectively located at both ends of the adjusting member. The first external thread is threadedly engaged with the first internal thread, and the second external thread is threadedly engaged with the second internal thread.

[0013] Optionally, the connection structure includes a connector and a clamping assembly. The connector is movably connected to the adjusting member, and the clamping assembly is connected to the connector. The end of the flexible transmission structure includes a first clamping section, and the clamping assembly is used to clamp the first clamping section.

[0014] Optionally, the clamping assembly includes a first clamping member and a second clamping member. The first clamping member has a first assembly hole for receiving a first clamping segment. The second clamping member passes through and is connected to the first clamping member. The second clamping member is configured to cooperate with the wall of the first assembly hole to clamp the first clamping segment.

[0015] Optionally, the second clamping member is detachably inserted through the first clamping member.

[0016] Optionally, the first clamping member is provided with a second assembly hole, the second assembly hole is connected to the first assembly hole, the wall of the second assembly hole is provided with a third internal thread, the second clamping member is provided with a third external thread, and the third internal thread and the third external thread are threadedly engaged.

[0017] Optionally, one of the first clamping member and the second clamping member is inserted into the connector.

[0018] Optionally, the side wall of the first clamping member is provided with a first protrusion, and the side wall of the second clamping member is provided with a second protrusion. The first protrusion and the second protrusion are respectively located on opposite sides of the connector. The second protrusion abuts against the connector. The end of the flexible transmission structure also includes a second clamping section, which is connected to the first clamping section. The first protrusion is configured to cooperate with the connector to clamp the second clamping section.

[0019] The second objective of this invention is to provide a door or window in which the flexible transmission structure, when stretched due to plastic deformation, can be re-tensioned by a tension adjustment device.

[0020] To achieve this objective, the present invention adopts the following technical solution:

[0021] The door and window include a sash, a flexible transmission structure, movable parts, and the aforementioned tension adjustment device. The flexible transmission structure is movably connected to the sash along the circumference of the sash. There are at least two movable parts, which are connected by the flexible transmission structure. The two ends of the flexible transmission structure are respectively connected to two connecting structures, and the two ends connected to the two connecting structures are located on the same side of the sash.

[0022] The beneficial effects of this utility model are:

[0023] When the flexible transmission structure is stretched due to plastic deformation, the relative position of the adjusting component and the connecting structure is adjusted so that the two connecting structures move in opposite directions. This causes the two connecting structures to bring the two ends of the flexible transmission structure closer together, achieving the effect of tightening the flexible transmission structure. When the two ends of the flexible transmission structure move to the appropriate position, that is, when the flexible transmission structure returns to the taut state, the locking structure locks the relative position of the adjusting component and the connecting structure to maintain the relative position of the two ends of the flexible transmission structure, thus keeping the flexible transmission structure in a taut state. This tension adjusting device achieves the effect of re-tightening the stretched flexible transmission structure, thereby ensuring the transmission accuracy between the various moving parts on the doors and windows. Attached Figure Description

[0024] Figure 1 This is an exploded structural diagram of the tension adjustment device provided in Embodiment 1 of this utility model;

[0025] Figure 2 This is an exploded structural diagram of the door and window provided in Embodiment 1 of this utility model;

[0026] Figure 3 This is an exploded structural diagram of the door and window provided in Embodiment 2 of this utility model.

[0027] In the picture:

[0028] 10. Flexible transmission structure; 11. End; 11a. First clamping section; 11b. Second clamping section; 12. First flexible transmission component; 13. Second flexible transmission component; 14a. First end; 14b. Second end; 14c. Third end; 14d. Fourth end; 20. Fan body; 31. Transmission housing; 32. Locking rod; 33. Side-pressure lower pulley; 34. Side-pressure upper pulley; 40. Tension adjustment device;

[0029] 100. Connecting structure; 110. Connector; 111. Adjusting hole; 112. Third assembly hole; 121. First clamping member; 1211. First assembly hole; 1212. Second assembly hole; 1213. First protrusion; 122. Second clamping member; 1221. Second protrusion; 200. Adjusting member; 210. Clamping part. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Example 1

[0035] This embodiment provides a tension adjustment device that can re-tighten an elongated flexible transmission structure, thereby ensuring the transmission accuracy between various moving parts on doors and windows.

[0036] Specifically, such as Figure 1As shown, the tension adjustment device 40 includes an adjustment member 200, a locking structure, and two connecting structures 100. The two connecting structures 100 are respectively connected to the two ends 11 of the flexible transmission structure 10. The two ends 11 of the flexible transmission structure 10 are located on the same side of the door / window sash. At least two movable parts of the door / window can be connected by the flexible transmission structure 10. The two ends of the adjustment member 200 are respectively movably connected to the two connecting structures 100 so that the two connecting structures 100 can move in a direction facing each other. The locking structure is used to lock the relative position of the adjustment member 200 and the connecting structures 100.

[0037] Based on the above design, when the flexible transmission structure 10 is stretched due to plastic deformation, the relative position of the adjusting member 200 and the connecting structure 100 is adjusted so that the two connecting structures 100 move in the direction of mutual orientation. In turn, the two connecting structures 100 drive the two ends 11 of the flexible transmission structure 10 to move closer to each other, thereby achieving the effect of tightening the flexible transmission structure 10. When the two ends 11 of the flexible transmission structure 10 move to the appropriate position, that is, when the flexible transmission structure 10 returns to the tightened state, the locking structure locks the relative position of the adjusting member 200 and the connecting structure 100 to maintain the relative position of the two ends 11 of the flexible transmission structure 10, so that the flexible transmission structure 10 remains in a tightened state. This tension adjusting device 40 achieves the effect of re-tightening the stretched flexible transmission structure 10, thereby providing a guarantee for the transmission accuracy between the various moving parts on the door and window.

[0038] Furthermore, each of the two connecting structures 100 has an adjustment hole 111 on one side facing each other. The axis of the adjustment hole 111 is parallel to the direction in which the two connecting structures 100 point to each other. The two ends of the adjustment member 200 are respectively movably disposed in the corresponding adjustment hole 111. When it is necessary to tighten the flexible transmission structure 10, the adjustment member 200 is moved in the depth direction of the adjustment hole 111, so that the two connecting structures 100 can be brought closer to each other, thereby tightening the flexible transmission structure 10.

[0039] Furthermore, the locking structure includes a first internal thread, a second internal thread, a first external thread, and a second external thread. The first internal thread and the second internal thread are respectively located on the hole walls of the adjustment holes 111 of the two connecting structures 100. The first internal thread and the second internal thread have opposite directions of rotation. The first external thread and the second external thread are respectively located at both ends of the adjusting member 200. The first external thread is threadedly engaged with the first internal thread, and the second external thread is threadedly engaged with the second internal thread. Through the threaded engagement structure of the internal and external threads, the relative position of the adjusting member 200 and the connecting structure 100 is locked. This structure is simple in design and easy to manufacture. In actual operation, the two connecting structures 100 can be brought closer to each other by turning the adjusting member 200, thereby tightening the flexible transmission structure 10. It can be seen that this structure design helps to simplify the operation difficulty of tightening the flexible transmission structure 10.

[0040] Preferably, the outer wall of the adjusting member 200 is provided with a clamping part 210, which is located between the first external thread and the second external thread. The clamping part 210 is hexagonal prism-shaped so that the clamping part 210 can be clamped and the adjusting member 200 can be turned by using tools such as wrenches.

[0041] In one embodiment, the two ends of the adjusting member 200 are respectively movably disposed within a corresponding adjusting hole 111. The locking structure includes a slot and an elastic protrusion. The slot is formed on the wall of the adjusting hole 111, and there are multiple slots spaced apart along the axial direction of the adjusting hole 111. The elastic protrusion can be a rubber protrusion or a plastic protrusion, etc., and is disposed on the side wall of the adjusting member 200. The elastic protrusion is detachably engaged within the slot. When it is necessary to tighten the flexible transmission structure 10, the adjusting member 200 is screwed on, causing the elastic protrusion to be compressed and deformed. The adjustment member 200 is disengaged from the current slot and then moved towards the depth of the adjustment hole 111. During the movement, the two connecting structures 100 move closer to each other, and the flexible transmission structure 10 is gradually tightened. When the flexible transmission structure 10 is tightened to a suitable tension, that is, when the two connecting structures 100 move to a suitable relative position, the adjustment member 200 is stopped from moving. Then, the adjustment member 200 is rotated in the opposite direction, so that the elastic protrusion is engaged in the adjacent slot. The elastic protrusion engaged in the slot returns to its natural state, thereby locking the relative position of the adjustment member 200 and the connecting structure 100.

[0042] In another embodiment, both connecting structures 100 are provided with sliding grooves, the extension direction of which is parallel to the direction in which the two connecting structures 100 point to each other. Both ends of the adjusting member 200 are provided with sliding rails, and the two sliding rails are respectively slidably engaged with a corresponding sliding groove. By sliding the adjusting member 200, the two connecting structures 100 are brought closer to each other, thereby tightening the flexible transmission structure 10. The locking structure includes a first magnet and a second magnet with opposite magnetic properties. There are multiple first magnets, which are spaced apart and embedded in the bottom of the groove. The second magnet is embedded on the side of the slide rail facing the bottom of the groove. When it is necessary to tighten the flexible transmission structure 10, the adjusting member 200 is pulled along the extension direction of the groove, so that the mutually attracted second magnets are separated from the first magnets. Then, the adjusting member 200 is pulled further to bring the two connecting structures 100 closer to each other, and the flexible transmission structure 10 is gradually tightened. When the flexible transmission structure 10 is tightened to a suitable tension, that is, when the two connecting structures 100 move to a suitable relative position, the adjusting member 200 is stopped, so that the second magnet attracts the adjacent first magnet, thereby locking the relative position of the adjusting member 200 and the connecting structure 100.

[0043] Optionally, the connecting structure 100 includes a connector 110 and a clamping assembly. The connector 110 is movably connected to the adjusting member 200, that is, the adjusting hole 111 is opened on the connector 110. The clamping assembly is connected to the connector 110. The end 11 of the flexible transmission structure 10 includes a first clamping section 11a. The clamping assembly is used to clamp the first clamping section 11a to realize the connection between the end 11 of the flexible transmission structure 10 and the connecting structure 100. Furthermore, compared to the shaft-hole type connection structure 100 (for example, a connection hole is opened at the end 11 of the flexible transmission structure 10, and a convex shaft is provided on the connection structure 100 so that the convex shaft is locked in the connection hole), the clamping type connection structure 100 provided in this embodiment avoids the problem of gaps between the convex shaft and the wall of the connection hole due to dimensional deviations. If there are gaps between the convex shaft and the wall of the connection hole, the flexible transmission structure 10 is prone to relative displacement with respect to the connection structure 100, which reduces the stability of the connection between the flexible transmission structure 10 and the connection structure 100, and thus reduces the transmission accuracy between the moving parts on the door and window. The clamping type connection structure 100 provided in this embodiment avoids the above problems, which helps to improve the stability of the connection between the flexible transmission structure 10 and the connection structure 100, and thus provides a guarantee for the transmission accuracy between the moving parts on the door and window.

[0044] Furthermore, the clamping assembly includes a first clamping member 121 and a second clamping member 122. The first clamping member 121 is provided with a first assembly hole 1211 for receiving a first clamping segment 11a. The second clamping member 122 passes through and is connected to the first clamping member 121. The second clamping member 122 is configured to cooperate with the wall of the first assembly hole 1211 to clamp the first clamping segment 11a.

[0045] Furthermore, the second clamping member 122 is detachably inserted through the first clamping member 121. When the flexible transmission structure 10 needs to be replaced, the first clamping section 11a can be released by removing the second clamping member 122 from the first clamping member 121, thereby allowing the flexible transmission structure 10 to be detached from the connecting structure 100.

[0046] Furthermore, the first clamping member 121 is provided with a second assembly hole 1212, which communicates with the first assembly hole 1211. The second assembly hole 1212 has a third internal thread on its wall, and the second clamping member 122 has a third external thread. The third internal thread and the third external thread are threadedly engaged. By screwing the second clamping member 122, the second clamping member 122 and the first clamping member 121 can be disassembled and assembled. This structure helps to simplify the disassembly and assembly of the second clamping member 122 and the first clamping member 121, thereby simplifying the disassembly and assembly of the connecting structure 100 and the flexible transmission structure 10, which is conducive to improving production and maintenance efficiency.

[0047] In one embodiment, the first clamping member 121 is provided with a second assembly hole 1212, which communicates with the first assembly hole 1211. An iron sheet is embedded in the wall of the first assembly hole 1211, and a magnet is embedded in one end of the second clamping member 122 facing the wall of the first assembly hole 1211. The second clamping member 122 and the first clamping member 121 can be detachably connected by the adsorption of the iron sheet and the magnet, and the first clamping section 11a can also be clamped between the second clamping member 122 and the wall of the first assembly hole 1211.

[0048] Optionally, the connector 110 is provided with a third assembly hole 112, and the first clamping member 121 passes through the third assembly hole 112 to realize the connection between the clamping assembly and the connector 110. This structural design is compact and helps to reduce the overall volume of the tension adjustment device 40. Of course, in other embodiments, the second clamping member 122 can also pass through the connector 110.

[0049] In one embodiment, one of the first clamping member 121 and the second clamping member 122 is connected to the outer wall of the connector 110 to achieve the connection between the clamping assembly and the connector 110.

[0050] Furthermore, the side wall of the first clamping member 121 is provided with a first protrusion 1213, and the side wall of the second clamping member 122 is provided with a second protrusion 1221. The first protrusion 1213 and the second protrusion 1221 are respectively located on opposite sides of the connector 110. The second protrusion 1221 abuts against the connector 110. The end 11 of the flexible transmission structure 10 also includes a second clamping section 11b, which is connected to the first clamping section 11a. The first protrusion 1213 is configured to cooperate with the connector 110 to clamp the second clamping section 11b, thereby improving the reliability and stability of the connection between the flexible transmission structure 10 and the connecting structure 100 and reducing the probability of relative displacement of the flexible transmission structure 10 relative to the connecting structure 100.

[0051] Preferably, the first assembly hole 1211 is a through hole, which can extend the length of the first clamping section 11a, thereby improving the reliability of the second clamping member 122 clamping the first clamping section 11a by cooperating with the wall of the first assembly hole 1211. In this embodiment, there are two second clamping sections 11b, which are respectively connected to the two ends of the first clamping section 11a, so as to further improve the reliability and stability of the connection between the flexible transmission structure 10 and the connecting structure 100.

[0052] In this embodiment, the first clamping member 121 is made of steel, the connecting member 110 is made of alloy, the second clamping member 122 is a standard part with external threads such as a bolt or screw, and its nut is the second protrusion 1221. The adjusting member 200 is a standard part with opposite external threads at both ends such as a double-ended screw. This makes the tension adjusting device 40 have a certain structural strength and also reduces the production difficulty of the tension adjusting device 40.

[0053] This embodiment also provides a door or window, such as Figure 2 As shown, the door and window includes a sash 20, a flexible transmission structure 10, movable parts, and the aforementioned tension adjustment device 40. The flexible transmission structure 10 is movably connected to the sash 20 along its circumference. There are at least two movable parts, which are connected by the flexible transmission structure 10. The two ends 11 of the flexible transmission structure 10 are respectively connected to two connecting structures 100. The two ends 11 connected to the two connecting structures 100 are located on the same side of the sash 20. The door and window uses the aforementioned tension adjustment device 40. When the flexible transmission structure 10 is stretched due to plastic deformation, the tension adjustment device 40 can re-tighten the flexible transmission structure 10, thereby providing a strong guarantee for the transmission accuracy between the movable parts.

[0054] On the other hand, before assembling the fan body 20 and the flexible transmission structure 10, there is no need to accurately calculate the length of the flexible transmission structure 10. It is only necessary to estimate the approximate length of the flexible transmission structure 10, and then fit the flexible transmission structure 10 onto the outer periphery of the fan body 20. The first end 14a and the second end 14b are respectively connected to the two connecting structures 100 of the tension adjustment device 40, and each moving part is connected to the flexible transmission structure 10. Then, the flexible transmission structure 10 can be tightened by turning the adjustment component 200. It can be seen that the tension adjustment device 40 can not only tighten the loose flexible transmission structure 10, but also save the step of accurately calculating the length of the flexible transmission structure 10 during assembly. The initial tightening of the flexible transmission structure 10 can be achieved by turning the adjustment component 200.

[0055] Furthermore, the aforementioned flexible transmission structure 10 can be a transmission element with certain flexible properties, such as a steel rope, steel belt, aluminum rope, or aluminum belt.

[0056] like Figure 2 As shown, in this embodiment, the movable components include a transmission housing 31, a locking rod 32, a side-pressure lower pulley 33, and a side-pressure upper pulley 34. The flexible transmission structure 10 includes a first flexible transmission component 12 and a second flexible transmission component 13. The first flexible transmission component 12 is sleeved on the bottom, lower left half, and lower right half of the fan body 20. The second flexible transmission component 13 is sleeved on the top, upper left half, and upper right half of the fan body 20. The first flexible transmission component 12 includes a first end 14a and a third end 14c. The second flexible transmission component 13 includes a second end 14b and a fourth end 14d. The first end 14a and the second end 14b are located on the fan body 20. On the same side of body 20 (both located on the right side of fan body 20), the first end 14a and the second end 14b are respectively connected to the two connecting structures 100 of tension adjustment device 40, the third end 14c and the fourth end 14d are respectively connected to the two ends of transmission housing 31, the locking rod 32 and the side pressure pulley 33 are both connected to the first flexible transmission member 12, and the side pressure pulley 34 is connected to the second flexible transmission member 13. Thus, the transmission connection of transmission housing 31, locking rod 32 and side pressure pulley 33 is realized through the first flexible transmission member 12, and the transmission connection between transmission housing 31 and side pressure pulley 34 is realized through the second flexible transmission member 13. When the first flexible transmission member 12 and / or the second flexible transmission member 13 are stretched due to plastic deformation, the screwing adjustment member 200 can move the first end 14a and the second end 14b in the direction of mutual orientation, thereby tightening both the first flexible transmission member 12 and the second flexible transmission member 13, which provides a guarantee for the transmission accuracy of the transmission housing 31, the locking rod 32, the side pressure lower pulley 33 and the side pressure upper pulley 34.

[0057] It should be noted that when the flexible transmission structure 10 includes three or more flexible transmission components, for example, the number of flexible transmission structures 10 is three, four or more, since the two adjacent flexible transmission components are connected by the same moving part, the multiple flexible transmission components form a whole in the circumferential direction of the fan body 20 (i.e., flexible transmission structure 10). Therefore, the tension adjustment device 40 provided in this embodiment is also applicable.

[0058] It should also 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, "sash 20" refers to both door sashes and window sashes; that is, it can refer to either door sashes or window sashes. Therefore, the tension adjustment device 40 provided in this embodiment can be applied to both doors and windows.

[0059] Example 2

[0060] This embodiment provides a door and window. The following mainly describes the differences between this embodiment and Embodiment 1, while the similarities will not be repeated.

[0061] like Figure 3 As shown, the flexible transmission structure 10 includes a first flexible transmission member 12, which is sleeved on the entire outer periphery of the fan body 20. The first flexible transmission member 12 includes a first end 14a and a second end 14b, which are located on the same side of the fan body 20. The first end 14a and the second end 14b are respectively connected to two connecting structures 100 of the tension adjustment device 40. The transmission housing 31, the locking rod 32, the side pressure lower pulley 33, and the side pressure upper pulley 34 are all connected to the first flexible transmission member. The first flexible transmission member 12 is connected to the transmission housing 31, locking rod 32, side pressure lower pulley 33 and side pressure upper pulley 34. When the first flexible transmission member 12 is stretched due to plastic deformation, the first end 14a and the second end 14b can be moved in the direction of mutual orientation by turning the adjusting member 200, thereby tightening the first flexible transmission member 12, which provides a guarantee for the transmission accuracy of the transmission housing 31, locking rod 32, side pressure lower pulley 33 and side pressure upper pulley 34.

[0062] 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 tension adjusting device, characterized in that, include: Two connecting structures (100) are used to connect to the two ends (11) of the flexible transmission structure (10) respectively. The two ends (11) of the flexible transmission structure (10) are located on the same side of the door and window sash. At least two moving parts of the door and window can be connected by transmission through the flexible transmission structure (10). An adjusting member (200) has two ends that are movably connected to two connecting structures (100) respectively, so that the two connecting structures (100) can move in a direction that faces each other. A locking structure is provided for locking the relative position of the adjusting member (200) and the connecting structure (100).

2. The tension adjusting device according to claim 1, characterized in that, Each of the two connecting structures (100) has an adjustment hole (111) on one side facing each other. The axis of the adjustment hole (111) is parallel to the direction in which the two connecting structures (100) point to each other. The two ends of the adjustment member (200) are respectively movably disposed in one of the corresponding adjustment holes (111).

3. The tension adjusting device according to claim 2, characterized in that, The locking structure includes a first internal thread, a second internal thread, a first external thread, and a second external thread. The first internal thread and the second internal thread are respectively located on the hole walls of the adjusting holes (111) of the two connecting structures (100). The first internal thread and the second internal thread have opposite directions of rotation. The first external thread and the second external thread are respectively located at both ends of the adjusting member (200). The first external thread is threadedly engaged with the first internal thread, and the second external thread is threadedly engaged with the second internal thread.

4. The tension adjusting device according to any one of claims 1-3, characterized in that, The connection structure (100) includes a connector (110) and a clamping assembly. The connector (110) is movably connected to the adjusting member (200). The clamping assembly is connected to the connector (110). The end (11) of the flexible transmission structure (10) includes a first clamping section (11a). The clamping assembly is used to clamp the first clamping section (11a).

5. The tension adjusting device according to claim 4, characterized in that, The clamping assembly includes a first clamping member (121) and a second clamping member (122). The first clamping member (121) is provided with a first assembly hole (1211) for accommodating the first clamping segment (11a). The second clamping member (122) passes through and is connected to the first clamping member (121). The second clamping member (122) is configured to cooperate with the wall of the first assembly hole (1211) to clamp the first clamping segment (11a).

6. The tension adjusting device according to claim 5, characterized in that, The second clamping member (122) is detachably inserted through the first clamping member (121).

7. The tension adjusting device according to claim 6, characterized in that, The first clamping member (121) is provided with a second assembly hole (1212), which communicates with the first assembly hole (1211). The second assembly hole (1212) is provided with a third internal thread on its hole wall, and the second clamping member (122) is provided with a third external thread. The third internal thread and the third external thread are threadedly engaged.

8. The tension adjusting device according to claim 5, characterized in that, One of the first clamping member (121) and the second clamping member (122) is inserted through the connector (110).

9. The tension adjusting device according to claim 8, characterized in that, The first clamping member (121) has a first protrusion (1213) on its side wall, and the second clamping member (122) has a second protrusion (1221) on its side wall. The first protrusion (1213) and the second protrusion (1221) are located on opposite sides of the connector (110). The second protrusion (1221) abuts against the connector (110). The end (11) of the flexible transmission structure (10) also includes a second clamping section (11b). The second clamping section (11b) is connected to the first clamping section (11a). The first protrusion (1213) is configured to cooperate with the connector (110) to clamp the second clamping section (11b).

10. Doors and windows, characterized in that, The device includes a fan body (20), a flexible transmission structure (10), movable parts, and a tension adjustment device (40) as described in any one of claims 1-9. The flexible transmission structure (10) is movably connected to the fan body (20) along the circumference of the fan body (20). The number of movable parts is at least two, and the at least two movable parts are connected by transmission through the flexible transmission structure (10). The two ends (11) of the flexible transmission structure (10) are respectively connected to the two connecting structures (100), and the two ends (11) connected to the two connecting structures (100) are located on the same side of the fan body (20).

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