Translationally retractable slide mechanism

Abstract

The application discloses a translation retraction type lower sliding mechanism, which comprises a trolley assembly and a swing arm assembly. The trolley assembly is used to be installed on a predetermined frame and can move along a first direction of the predetermined frame and a second direction opposite to the first direction. The swing arm assembly comprises a swing arm and a transmission member, the first end of the swing arm is rotatably connected with the trolley assembly, the second end opposite to the first end of the swing arm is used to be connected with the predetermined structure at least, and the transmission member is connected with the swing arm. The transmission member is configured to be driven by external force to move the swing arm relative to the trolley assembly when the trolley assembly moves to a predetermined position relative to the predetermined frame along the first direction, so that the first end of the swing arm moves along the second direction and synchronously drives the second end of the swing arm to rotate towards the direction of the inner side of the predetermined frame. The application can at least solve the problem that the existing technology is prone to interference with the frame during the process of returning the movable fan into the frame.

Description

Technical Field

[0001] This application relates to the field of door and window hardware equipment technology, and more specifically, to a translational retractable sliding mechanism. Background Technology

[0002] In related technologies, sliding doors and windows include a frame and a movable sash. The movable sash can slide out of the frame via a sliding mechanism and slide sideways relative to the frame; it can also tilt inward to achieve micro-ventilation. However, during the process of the movable sash returning to the frame, it is prone to interference with the frame. Summary of the Invention

[0003] The main objective of this application is to provide a translational retraction sliding mechanism to solve the problem in the prior art where the movable fan easily interferes with the frame during the process of returning to the frame.

[0004] According to one aspect of this application, a translational retractable sliding mechanism is provided, comprising: A trolley assembly for mounting on a predetermined frame and capable of moving along a first direction and a second direction opposite to the first direction of the predetermined frame; A swing arm assembly, the swing arm assembly including a swing arm and a transmission member, a first end of the swing arm being rotatably connected to the trolley assembly, a second end of the swing arm opposite to the first end being at least used for connection to a predetermined structure, and the transmission member being connected to the swing arm; The transmission component is configured such that when the trolley assembly moves to a predetermined position relative to the predetermined frame along the first direction, the swing arm is driven to move relative to the trolley assembly by an external force, so that the first end of the swing arm moves along the second direction and simultaneously drives the second end of the swing arm to rotate toward the inner side of the predetermined frame.

[0005] Furthermore, the swing arm has an open position in which its second end protrudes out of the predetermined frame, a closed position in which its second end moves to the inside of the predetermined frame, and an intermediate position between the open position and the closed position. Wherein, after the transmission component is driven by an external force to move the swing arm relative to the trolley assembly from the open position to the intermediate position, the swing arm can move from the intermediate position to the closed position under the action of inertia; During the process of the swing arm moving from the middle position to the closed position: the first end of the swing arm moves along the second direction, while simultaneously driving the second end of the swing arm to rotate towards the inside of the predetermined frame.

[0006] Furthermore, the rotatable connection between the swing arm and the trolley assembly is the first rotation center; The transmission component is driven by an external force to rotate the swing arm around the first rotation center, so that the swing arm moves from the open position to the intermediate position.

[0007] Furthermore, the swing arm assembly also includes: A stop portion is disposed on the swing arm; The first end of the transmission member is rotatably connected to the swing arm. When the swing arm is in the open position, at least a portion of the first end of the transmission member stops at the stop portion. The second end of the transmission member opposite to the first end is subjected to an external force to drive the swing arm to rotate with the first end of the transmission member toward the inner side of the predetermined frame, so that the swing arm moves from the open position to the intermediate position.

[0008] Furthermore, the stop portion includes: A stop boss is provided along the thickness direction of the swing arm, protruding and fixed to the swing arm and located near the first end of the swing arm.

[0009] Furthermore, the swing arm and / or the stop portion are provided with a receiving groove, and when the swing arm is in the open position, at least a portion of the first end of the transmission member is located in the receiving groove.

[0010] Furthermore, along the length direction of the swing arm, the first end of the transmission member is located on the side of the stop portion near the second end of the swing arm, and the stop portion is located on the side of the transmission member facing the second direction, and the second end of the transmission member can be driven by external force to move the swing arm from the open position to the middle position.

[0011] Furthermore, the translational retractable sliding mechanism also includes: A positioning component is provided for fixing to the predetermined frame. When the trolley assembly moves relative to the predetermined frame along the first direction to the predetermined position, the positioning component applies a force to the transmission member.

[0012] Furthermore, the positioning component includes: A positioning element, the positioning element being used to fix the predetermined frame; A force-applying component is disposed on the positioning component, and the force-applying component has an initial state and a force-storing state that deforms under pressure; When the trolley assembly moves along the first direction and causes the transmission member to collide with the force-applying member, the force-applying member deforms from the initial state to the stored state; when the trolley assembly moves along the first direction to the predetermined position, the force-applying member returns from the stored state to the initial state and applies a force to the transmission member.

[0013] Furthermore, the positioning member is disposed on one side of the trolley assembly in the width direction, and the force-applying member at least partially protrudes from the positioning member and is located between the positioning member and the trolley assembly.

[0014] Furthermore, the positioning member is provided with an installation groove, and the force-applying member includes: A torsion spring is disposed in the mounting groove, with its first end abutting against the inner wall of the mounting groove and its second end extending out of the mounting groove. The second end of the torsion spring is configured to: drive the force-applying member to deform from the initial state to the stored state under the impact of the transmission member, and apply a force to the transmission member during the process of the force-applying member returning from the stored state to the initial state.

[0015] Furthermore, the transmission component is located between the force-applying component and the swing arm. During the process of the force-applying component recovering from the stored state to the initial state and applying a force to the transmission component: The second end of the transmission member moves relative to the predetermined frame along a predetermined guide trajectory, and the first end of the transmission member drives the swing arm to move, so that the first end of the swing arm moves along the second direction and simultaneously drives the second end of the swing arm to rotate toward the inner side of the predetermined frame.

[0016] Furthermore, the positioning member is provided with a guide groove, the opening of the guide groove faces the inner side of the predetermined frame, the extension direction of the guide groove forms the guide trajectory, and the second end of the transmission member slides along the extension direction of the guide groove under the action of the force-applying member.

[0017] Furthermore, the guide groove extends to a predetermined depth along the width direction of the trolley assembly and is inclined toward the second direction.

[0018] Furthermore, the second end of the transmission member is provided with a guide post, and the first end of the transmission member rotates relative to the trolley assembly under the action of the force-applying member, while the guide post slides along the extension direction of the guide groove.

[0019] Furthermore, the edge of the second end of the transmission member is provided with a top abutment, and when the transmission member rotates to the bottom of the guide groove, the top abutment abuts against the bottom of the guide groove.

[0020] Furthermore, along the width direction of the trolley assembly, a guide ramp is provided on the side of the positioning member near the trolley assembly, and the guide ramp is located on the side of the force-applying member facing the second direction; Along the first direction, the distance between the guide ramp and the trolley assembly gradually decreases.

[0021] Furthermore, a stop block is provided on the predetermined frame or the positioning member, and when the trolley assembly moves to the predetermined position along the first direction, the end of the trolley assembly stops at the stop block.

[0022] Furthermore, the impact block is provided with a first latching part, and the positioning member is provided with a second latching part that cooperates with the first latching part.

[0023] Furthermore, along the second direction, a buffer pad is provided on the side of the impact block near the trolley assembly.

[0024] Furthermore, the rotatable connection between the transmission component and the swing arm is the second rotation center; The swing arm rotates around the second rotation center under inertia, and drives its first end to move along the second direction. At the same time, the second end of the swing arm rotates toward the inside of the predetermined frame, so that the swing arm moves from the middle position to the closed position.

[0025] Furthermore, along the length direction of the swing arm, the second rotation center is located on the side near the second end of the swing arm at the rotational connection between the swing arm and the trolley assembly; Furthermore, when the swing arm is in the open position, the second rotation center is located on the side facing the second direction at the rotational connection between the swing arm and the trolley assembly.

[0026] Furthermore, when the swing arm moves between the open position and the intermediate position, the second end of the swing arm rotates along the first arc trajectory by a first predetermined angle; when the swing arm moves between the intermediate position and the closed position, the second end of the swing arm rotates along the second arc trajectory by a second predetermined angle. Wherein, the second predetermined angle is greater than the first predetermined angle; and / or, The curvature of the first circular arc trajectory is greater than the curvature of the second circular arc trajectory.

[0027] Furthermore, the swing arm assembly also includes: A transmission limiting component is configured to abut against the transmission member when the trolley assembly moves along the first direction, so as to limit the transmission member to a preset position.

[0028] Furthermore, the transmission limiting component includes a first limiting part and a second limiting part. The first limiting part is disposed at the edge of the transmission member, and the second limiting part is disposed inside the trolley assembly. When the trolley assembly moves along the first direction, the first limiting part stops at the second limiting part.

[0029] Furthermore, the first limiting part includes a limiting step, and the second limiting part includes a rod. When the trolley assembly moves along the first direction, the rod abuts against the limiting step.

[0030] Furthermore, the transmission limiting component includes: An elastic element is disposed on the swing arm and configured to abut against the transmission member to apply an elastic force to the transmission member when the trolley assembly moves along the first direction.

[0031] Furthermore, when the swing arm moves from the closed position to the intermediate position under the opening action, the first end of the swing arm moves along the first direction, while the second end of the swing arm rotates in the direction protruding from the predetermined frame; When the swing arm moves from the middle position to the open position under the opening action, the transmission member rotates with the first end of the swing arm relative to the trolley assembly.

[0032] Furthermore, the trolley assembly is provided with an accommodating space, the first end of the swing arm is located within the accommodating space, the side of the swing arm near the predetermined frame is provided with an avoidance notch, and the avoidance notch is provided near the second end of the swing arm. When the swing arm is in the closed position, the trolley assembly is at least partially located within the avoidance notch.

[0033] In this application, when the trolley assembly moves to a predetermined position along a first direction, the transmission component, under the action of an external force, drives the swing arm to move relative to the trolley assembly. This causes the first end of the swing arm to move along a second direction and simultaneously drives the second end of the swing arm to rotate towards the inner side of the predetermined frame. In other words, while the second end of the swing arm rotates relative to the trolley assembly, it moves along the second direction, thereby causing the second end of the swing arm to drive the predetermined structure to rotate towards the inner side of the predetermined frame while simultaneously moving along the second direction. This ensures that the predetermined structure moves to align with the predetermined frame and returns to the predetermined frame without interfering with it. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is an exploded view of a translational retraction sliding mechanism, a predetermined structure, and a predetermined frame disclosed in an embodiment of this application. Figure 2 This is a front view of the predetermined structure disclosed in the embodiments of this application being moved outside the predetermined frame; Figure 3This is a front view of the predetermined structure disclosed in the embodiments of this application, returned to the predetermined frame. Figure 4 This is a schematic diagram of the installation of the translational retraction sliding mechanism, the predetermined structure, and the predetermined frame disclosed in the embodiments of this application; Figure 5 This is a structural diagram of the translational retraction sliding mechanism and the driven mechanism disclosed in the embodiments of this application; Figure 6 This is a structural diagram of the translational retraction sliding mechanism disclosed in the embodiments of this application; Figure 7 Exploded view (I) of the translational retraction sliding mechanism disclosed in the embodiment of this application; Figure 8 for Figure 1 Enlarged view of point P in the middle; Figure 9 This is a cross-sectional view (a) of the sliding mechanism with the swing arm in the open position as disclosed in the embodiments of this application. Figure 10 This is a cross-sectional view of the translational retractable sliding mechanism of the trolley assembly disclosed in this application when it is in a predetermined position; Figure 11 This is a cross-sectional view of the translational retracting downward sliding mechanism disclosed in the embodiments of this application when the swing arm is in the middle position; Figure 12 This is a cross-sectional view of the sliding mechanism with the swing arm in the closed position as disclosed in the embodiments of this application; Figure 13 The embodiments disclosed in this application Figure 11 Enlarged view of point Q; Figure 14 This is a schematic diagram of the swing arm moving from the open position to the middle position as disclosed in the embodiments of this application; Figure 15 This is a schematic diagram of the swing arm moving from the middle position to the closed position as disclosed in the embodiments of this application; Figure 16 This is a structural diagram of the vehicle body disclosed in an embodiment of this application; Figure 17 This is a structural diagram of the swing arm disclosed in the embodiments of this application; Figure 18 This is a structural diagram of the transmission component disclosed in the embodiments of this application; Figure 19 This is a structural diagram of the elastic element disclosed in the embodiments of this application; Figure 20 This is a structural diagram of the positioning component disclosed in the embodiments of this application; Figure 21 Exploded view (II) of the translational retraction sliding mechanism disclosed in the embodiments of this application; Figure 22 This is a cross-sectional view (II) of the sliding mechanism for translational retraction when the swing arm is in the open position as disclosed in the embodiments of this application. Figure 23 for Figure 3 Sectional view at mid-section C; Figure 24 for Figure 3 Sectional view at mid-section D; Figure 25 for Figure 3 Sectional view at mid-section A; Figure 26 for Figure 3 Sectional view at mid-section A1; Figure 27 for Figure 3 Sectional view at mid-section A2; Figure 28 This is a structural diagram of the driven mechanism disclosed in the embodiments of this application; Figure 29 This is an exploded view of the driven mechanism disclosed in the embodiments of this application; Figure 30 This is a cross-sectional view of the translational retractable sliding mechanism disclosed in this application when the swing arm is in the open position and no impact block is provided; Figure 31 This is a cross-sectional view of the translational retractable sliding mechanism disclosed in this application when the trolley assembly is in a predetermined position and no impact block is provided; Figure 32 This is a cross-sectional view of the translational retractable downward sliding mechanism disclosed in this application embodiment when the swing arm is in the middle position and no impact block is provided; Figure 33 This is a cross-sectional view of the translational retractable sliding mechanism disclosed in this application when the rocker arm is in the closed position and no impact block is provided; Figure 34 for Figure 31 Enlarged view of the middle T section.

[0035] The above figures include the following reference numerals: 100. Translational retractable sliding mechanism; 10. Trolley assembly; 11. Car body; 111. Car bottom groove; 12. Roller; 13. Connecting shaft; 14. First side; 15. Second side; 16. Accommodation space; 18. Rotating component; 20. Swing arm assembly; 21. Swing arm; 211. Swing arm shaft; 212. First rotation center; 213. Receiving groove; 214. Clearance notch; 22. Transmission component; 221. Guide post; 222. Top; 223. Second rotation center; 224. Second concave-convex curved surface; 23. Stop part; 231. Stop boss; 2311. First concave-convex curved surface; 2312. Edge; 232. Limiting groove; 24. Transmission limiting component; 241. First limiting part; 2411. Limiting step; 242. Second limiting part; 2421. Rod body; 243. Elastic element; 2431. First lever arm; 2432. Second lever arm; 2433. Third lever arm; 30. Positioning assembly; 31. Positioning component; 311. Mounting groove; 3111. Limiting post; 312. Guide groove; 313. Clearance groove; 314. Guide slope; 315. Second latching part; 32. Force-applying component; 321. Torsion spring; 200. Pre-designed structure; 201. Handle; 202. First end face; 203. Corner bracket; 300. Pre-set frame; 301. Top beam; 302. Right beam; 303. Bottom beam; 3031. Slide groove; 3032. Convex rail; 304. Left beam; 305. Middle mullion; 306. Second end face; 400. Impact block; 401. First latching part; 402. Buffer pad; 500. Driven mechanism; 501. Coupling; 600. Sliding and retractable doors and windows. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0039] As described in the background section, in related technologies, sliding doors and windows include a frame and a movable sash. The movable sash can be moved out of the frame via a sliding mechanism and slide sideways relative to the frame, and can also tilt inward to achieve micro-ventilation. However, during the process of the movable sash returning to the frame, it is prone to interference with the frame. To address this, this application provides a novel sliding retractable downward sliding mechanism and a sliding retractable door and window. The sliding retractable downward sliding mechanism of this application can effectively prevent interference between the movable sash and the frame during the process of the movable sash returning to the frame. The sliding retractable downward sliding mechanism of this application will be described below with reference to the accompanying drawings.

[0040] See Figures 1 to 34 As shown, this application embodiment provides a translational retractable downward sliding mechanism 100. The translational retractable downward sliding mechanism 100 includes a trolley assembly 10 and a swing arm assembly 20. The trolley assembly 10 is used to be mounted on a predetermined frame 300 (which can be considered as the frame described above) and is capable of moving along a first direction of the predetermined frame 300 (e.g., ...). Figure 9 The direction indicated by the middle arrow X1) and the second direction opposite to the first direction (such as...) Figure 9 (In the direction indicated by the middle arrow X2) moves. The swing arm assembly 20 includes a swing arm 21 and a transmission member 22. A first end of the swing arm 21 is rotatably connected to the trolley assembly 10, and a second end of the swing arm 21 opposite to the first end is at least used for connection with a predetermined structure 200. It is understood that the predetermined structure 200 described herein includes, but is not limited to, movable sash structures such as movable windows and movable doors. The transmission member 22 is connected to the swing arm 21.

[0041] Among them, such as Figures 1 to 3As shown, the predetermined frame 300 may be rectangular, and includes an upper beam 301, a right beam 302, a lower beam 303, and a left beam 304 connected sequentially. In some embodiments, a translational retractable lower sliding mechanism 100 is mounted on the upper beam 301. In other embodiments, the translational retractable lower sliding mechanism 100 is mounted on the lower beam 303. In still other embodiments, both the upper beam 301 and the lower beam 303 are equipped with the translational retractable lower sliding mechanism 100. For ease of description, the height direction of the predetermined frame 300 is as follows: Figure 2 The direction indicated by the middle arrow Z.

[0042] In some embodiments, at least two predetermined frames 300 are sequentially connected along the length of the lower beam 303. That is, in two adjacent predetermined frames 300, the right beam 302 of the first predetermined frame 300 and the left beam 304 of the second predetermined frame 300 are interconnected to form a mullion 305 (see...). Figure 3 The predetermined structure 200 is capable of moving from the inside of one of the predetermined frames 300 to the outside of the predetermined frame 300 and returning to the inside of the predetermined frame 300. After the predetermined structure 200 moves to the outside of the predetermined frame 300, the predetermined structure 200 is also capable of translating and sliding relative to the predetermined frame 300 in a first direction or a second direction.

[0043] The inner side of the predetermined frame 300 refers to the interior of the space enclosed by the outer frame. Specifically, the inner side of the predetermined frame 300 is in the thickness direction of the predetermined frame 300 (e.g., ...). Figure 9 The space on either side of the outer frame of the predetermined frame 300 along the Y direction (indicated by the middle arrow Y).

[0044] Correspondingly, the predetermined structure 200 can also be rectangular. When the translational retractable sliding mechanism 100 is installed on the lower beam 303, the second end of the swing arm 21 is rotatably connected to the lower end of the predetermined structure 200. Specifically, the second end of the swing arm 21 is provided with a swing arm shaft 211, which extends a predetermined length along the Z direction and is rotatably connected to the lower end of the predetermined structure 200 through a rotating structure such as a bearing. Figure 4 As shown, a corner bracket 203 is installed at the lower end of the predetermined structure 200, and the swing arm shaft 211 is rotatably connected to the corner bracket 203.

[0045] The transmission component 22 is configured such that when the trolley assembly 10 moves to a predetermined position relative to the predetermined frame 300 along the first direction, the swing arm 21 is driven to move relative to the trolley assembly 10 by an external force, so that the first end of the swing arm 21 moves along the second direction and simultaneously drives the second end of the swing arm 21 to rotate toward the inner side of the predetermined frame 300.

[0046] In this embodiment, when the trolley assembly 10 moves to a predetermined position along the first direction, the transmission member 22 is driven by an external force to move the swing arm 21 relative to the trolley assembly 10, so that the first end of the swing arm 21 moves along the second direction and simultaneously drives the second end of the swing arm 21 to rotate towards the inner side of the predetermined frame 300. That is to say, while the second end of the swing arm 21 rotates relative to the trolley assembly 10, it moves along the second direction (X2), so that the second end of the swing arm 21 drives the predetermined structure 200 to rotate while moving along the X2 direction, ensuring that the predetermined structure 200 moves to be aligned with the predetermined frame 300 and returns to the predetermined frame 300 without interfering with it.

[0047] Compared to the existing technology where the swing arm rotates directly around the hinge point between the swing arm and the trolley assembly to drive the predetermined structure 200 back into the predetermined frame 300, this application uses the transmission member 22 to drive the second end of the swing arm 21 to rotate and retract along the X2 direction. This changes the trajectory of the predetermined structure 200, allowing it to rotate back to the inside of the predetermined frame 300 while simultaneously retracting along the X2 direction to align with the predetermined frame 300 in the Y direction. This ensures that the predetermined frame 300 returns to its original position without interference. Furthermore, this application avoids interference between the predetermined structure 200 and the predetermined frame 300, improving the smoothness and stability of the predetermined structure 200's return to the predetermined frame 300.

[0048] Furthermore, because this application can prevent hard collisions between the predetermined structure 200 and the predetermined frame 300, it not only protects the surface coatings of the predetermined structure 200 and the predetermined frame 300 profiles from scratches and wear, but also reduces the abnormal impact stress borne by the sliding retractable lower sliding mechanism 100, thereby reducing the failure rate of the sliding retractable door / window 600 and significantly extending its service life. The predetermined structure 200 in this application can fully enter the inner side of the predetermined frame 300, providing a good fit for the locking system and sealing strip, which helps maintain the airtightness and watertightness of the sliding retractable door / window 600 system during long-term use.

[0049] like Figures 9 to 15 As shown, the swing arm 21 further has an open position in which its second end protrudes beyond the predetermined frame 300 (e.g., Figure 9 , Figure 10 As shown), the second end of itself moves to the closed position inside the predetermined frame 300 (as shown). Figure 12 (as shown) and the intermediate position between the open and closed positions (as shown) Figure 11 (As shown).

[0050] During the process of the swing arm 21 moving from the middle position to the closed position: the first end of the swing arm 21 moves along the second direction, while driving the second end of the swing arm 21 to rotate towards the inner side of the predetermined frame 300.

[0051] In this system, the transmission component 22, under the action of an external force, drives the swing arm 21 to move relative to the trolley assembly 10 from the open position to the intermediate position. Then, the swing arm 21, under the influence of inertia, moves from the intermediate position to the closed position. The transmission component 22 initiates the movement of the swing arm 21 from the open position to the intermediate position; subsequently, the movement of the swing arm 21 from the intermediate position to the closed position relies on inertia. Only a small external force needs to be applied to the transmission component 22 to initiate the movement of the swing arm 21, allowing it to automatically move to the closed position. In other words, the magnitude of the external force applied to the transmission component 22 is sufficient to initiate the movement of the swing arm 21. Afterward, the swing arm 21 can automatically drive the predetermined structure 200 back to the inner side of the predetermined frame 300. Therefore, the predetermined structure 200 can gently return to the inner side of the predetermined frame 300, achieving a gentle and automatic closing effect, improving the user's operating feel and the product's perceived quality.

[0052] Specifically, the movement of the swing arm 21 is a continuous, instantaneous motion. Once the swing arm 21 moves to the intermediate position under the drive of the transmission component 22, it will continue to move to the closed position due to inertia. This effectively prevents the predetermined structure 200 from getting stuck halfway, failing to close completely, or requiring manual assistance to push it into the predetermined frame 300 due to external force interruption or operational hesitation. Therefore, this embodiment makes the action of the predetermined structure 200 returning to the predetermined frame 300 highly coherent and complete, thereby achieving a gentle and automatic closing effect.

[0053] Specifically, such as Figure 7 As shown, the trolley assembly 10 includes a car body 11, rollers 12, and a connecting shaft 13. The rollers 12 are located at the bottom of the car body 11 and can roll relative to it. The rollers 12 are slidably connected to a predetermined frame 300. Taking the trolley assembly 10 installed on a lower beam 303 as an example, a groove 3031 is provided within the lower beam 303, the lower end of the car body 11 is installed within the groove 3031, and the rollers 12 roll along the bottom of the groove 3031. Simultaneously, a protruding rail 3032 is provided at the bottom of the groove 3031, and a bottom groove 111 is provided at the bottom of the car body 11 that slidably engages with the protruding rail 3032. The connecting shaft 13 passes through the car body 11 along the Z-direction, and the first end of the swing arm 21 is sleeved on the connecting shaft 13.

[0054] Further, see Figure 8As shown, the convex rail 3032 extends along the length of the lower beam 303. A longitudinal section of the convex rail 3032 is obtained by cutting it with a plane perpendicular to its extension direction. The longitudinal section of the convex rail 3032 is mushroom-shaped. In the longitudinal section, the top of the convex rail 3032 is semi-circular, and the bottom of the convex rail 3032 is rectangular, with the diameter of the semi-circle connecting to the width of the rectangle.

[0055] Furthermore, such as Figure 9 , Figure 10 , Figure 11 , Figure 14 As shown, the rotational connection between the swing arm 21 and the trolley assembly 10 is the first rotation center 212. The transmission component 22, under the action of an external force, drives the swing arm 21 to rotate around the first rotation center 212, causing the swing arm 21 to move from the open position to the intermediate position. During the process of the transmission component 22 driving the swing arm 21 to the intermediate position under the action of an external force, the swing arm 21 undergoes a pure rotation around the first rotation center 212, simplifying the mechanical model of the swing arm 21's rotation. This makes the starting motion provided by the transmission component 22 to the swing arm 21 simpler, and also allows the driving arm and torque of the transmission component 22 to be accurately calculated, facilitating the design and manufacturing of the swing arm assembly 20. Furthermore, the rotation of the swing arm 21 around the fixed axis of the first rotation center 212 ensures that the swing arm 21 can be accurately driven to the same intermediate position each time, providing a stable and reliable starting point for subsequent inertial motion, achieving precise "one-touch" triggering of the swing arm 21, and improving the repeatability and stability of the swing arm 21's movement. In this embodiment, the axis of the connecting shaft 13 coincides with the first rotation center 212.

[0056] Furthermore, such as Figure 6 , Figure 7 , Figure 17 As shown, the swing arm assembly 20 also includes a stop portion 23, which is disposed on the swing arm 21. The first end of the transmission member 22 is rotatably connected to the swing arm 21. When the swing arm 21 is in the open position, at least a portion of the first end of the transmission member 22 stops at the stop portion 23, and the second end of the transmission member 22 opposite to the first end is subjected to an external force to drive the swing arm 21 to rotate with the first end of the transmission member 22 toward the inner side of the predetermined frame 300, so that the swing arm 21 moves from the open position to the intermediate position.

[0057] When the swing arm 21 is in the open position, the first end of the transmission member 22 stops at the stop part 23. At this time, an external force is applied to the second end of the transmission member 22, which pushes the stop part 23 to drive the swing arm 21 to rotate around the first rotation center 212 toward the inside of the predetermined frame 300. When the swing arm 21 moves to the middle position, the rotatable connection between the transmission member 22 and the swing arm 21 allows them to separate naturally. The swing arm 21 completes the subsequent closing action autonomously by inertia, and the transmission member 22 does not need to follow the movement, thus avoiding interference.

[0058] By setting the stop part 23, a one-way driving relationship is formed between the transmission member 22 and the swing arm 21. Only when the transmission member 22 moves in a specific direction will the stop part 23 push the swing arm 21 to rotate toward the inside of the predetermined frame 300.

[0059] When the swing arm 21 is in the open position, at least a portion of the first end of the transmission member 22 is stopped by the stop portion 23. Once an external force is applied to the second end of the transmission member 22, the torque is immediately transmitted to the swing arm 21 through the stop portion 23, and the swing arm 21 immediately begins to rotate. It has a high response speed and also reduces stroke loss.

[0060] In addition, the stop part 23 can also position the transmission component 22 to ensure the accurate assembly position of the transmission component 22 and ensure that the movement of the transmission component 22 has high repeatability.

[0061] Furthermore, the stop portion 23 includes a stop boss 231. Along the thickness direction of the rocker arm 21 (e.g., ... Figure 1 (In the direction indicated by the middle arrow Z), the stop boss 231 protrudes and is fixed to the swing arm 21 and is located near the first end of the swing arm 21. In this embodiment, the stop boss 231 is located near the first end of the swing arm 21, which means that the first end of the transmission member 22 is also located near the first end of the swing arm 21. This makes the distance from the second end of the transmission member 22 to the first rotation center 212 and the distance from the second end of the swing arm 21 to the first rotation center 212 form a reasonable ratio, which conforms to the optimized design of the lever principle. That is, the second end of the transmission member 22 can drive the swing arm 21 to rotate under a small external force, which meets the design requirements. When the user applies a small force to the predetermined structure 200, the predetermined structure 200 can automatically close and return to the predetermined frame 300.

[0062] The stop boss 231 protrudes from the rocker arm 21. The stop boss 231 forms a planar or curved contact area in the Z direction that abuts against the transmission component 22, ensuring surface contact between the first end of the transmission component 22 and the stop portion 23. This prevents the transmission component 22 from slipping or shifting when stopped, maintaining a stable limiting function even after long-term use. Simultaneously, the stop boss 231 increases the local thickness of the rocker arm 21, enhancing the bending and shear resistance of the first end of the rocker arm 21, effectively preventing deformation and breakage of the rocker arm 21.

[0063] Optionally, the stop boss 231 and the swing arm 21 are integrally formed.

[0064] Furthermore, the stop boss 231 is provided with a first concave-convex curved surface 2311 on the side near the transmission member 22, and the transmission member 22 is provided with a second concave-convex curved surface 224 that at least partially cooperates with the first concave-convex curved surface 2311.

[0065] Furthermore, in some embodiments, such as Figure 17 As shown, the swing arm 21 is provided with a receiving groove 213. When the swing arm 21 is in the open position, at least a portion of the first end of the transmission member 22 is located within the receiving groove 213. In some embodiments, the receiving groove 213 may also be provided within the stop portion 23. In other embodiments, the receiving groove 213 is provided between the swing arm 21 and the stop portion 23. When the swing arm 21 is in the open position, at least a portion of the transmission member 22 is located within the receiving groove 213, reducing the volume exposed to the outside and making the layout of the swing arm assembly 20 more compact. The receiving groove 213 also provides physical protection for the transmission member 22, reducing the possibility of dust and debris directly adhering to the surface of the transmission member 22 and improving the reliability of the transmission member 22. The receiving groove 213 can also prevent the transmission member 22 from being accidentally impacted by external forces.

[0066] In some embodiments, the bottom of the receiving groove 213 is used to stop the transmission member 22, and the inner wall shape of the receiving groove 213 can form a conformal fit with the outer shape of the transmission member 22. The receiving groove 213 limits the transmission member 22 when the swing arm 21 is in the open position.

[0067] In this embodiment, the stop portion 23 includes a stop boss 231. When the stop boss 231 is located at the top of the swing arm 21, an eave 2312 extends from the top edge of the stop boss 231, and the eave 2312 and the top surface of the swing arm 21 enclose the aforementioned receiving groove 213. Without increasing the number of parts or adding processing steps, the receiving groove 213 is formed simply by extending the eave 2312 onto the stop boss 231, reducing production costs and improving production efficiency and assembly process. The eave 2312 also prevents the transmission component 22 from accidentally falling off.

[0068] like Figure 11 , Figure 12 as well as Figure 15As shown, further, along the length direction of the swing arm 21 (from the first end to the second end of the swing arm 21), the first end of the transmission member 22 is located on the side of the stop portion 23 near the second end of the swing arm 21, and the stop portion 23 is located on the side of the transmission member 22 facing the second direction, and the second end of the transmission member 22 can be driven by external force to move the swing arm 21 from the open position to the middle position. The transmission component 22 acts on the stop portion 23, which is located near the first end of the swing arm 21. The first end of the transmission component 22 is located on the side of the stop portion 23 near the second end. Thus, the first end of the transmission component 22 is actually located between the stop portion 23 and the second end of the swing arm 21. This makes the force applied by the transmission component 22 to the stop portion 23 form an optimized lever arm relative to the first rotation center 212, ensuring that the transmission component 22 can drive the swing arm 21 to rotate under a small external force, thereby opening the rotation of the swing arm 21. Then, the swing arm 21 moves to the closed position under the inertia, giving the user the experience of closing the sliding retractable door and window 600 with a light touch.

[0069] Furthermore, the sliding retractable mechanism 100 also includes a positioning component 30. The positioning component 30 is fixed to the predetermined frame 300. When the trolley assembly 10 moves relative to the predetermined frame 300 along a first direction to a predetermined position, the positioning component 30 applies a force to the transmission member 22. When the trolley assembly 10 moves to the predetermined position, the positioning component 30 can apply a force to the transmission member 22, causing the transmission member 22 to drive the swing arm 21 to rotate. After the swing arm 21 starts moving, it moves to the closed position under inertia. The positioning component 30 is fixed to the predetermined frame 300 and can be located inside the predetermined frame 300. When the predetermined structure 200 is inside the predetermined frame 300, the positioning component 30 is not visible, improving the simple and aesthetically pleasing appearance of the sliding retractable door / window 600. The user only needs to apply force to move the predetermined structure 200 to move the trolley assembly 10 to the predetermined position, and the predetermined structure 200 can achieve self-closing, improving ease of use.

[0070] Furthermore, the timing of the positioning component 30 applying force to the transmission component 22 is when the trolley assembly 10 is in a predetermined position and the predetermined structure 200 returns to the predetermined frame 300. This embodiment ensures that the transmission component 22 is always subjected to force and movement in the same position, thereby improving the repeatability of the movement of the transmission component 22 and improving the stability of the predetermined structure 200.

[0071] Furthermore, such as Figure 13 , Figure 16As shown, the positioning assembly 30 includes a positioning member 31 and a force-applying member 32. The positioning member 31 is used to fix it to the predetermined frame 300. The force-applying member 32 is disposed on the positioning member 31 and has an initial state and a stored state in which it deforms under pressure. Specifically, when the trolley assembly 10 moves along the first direction and drives the transmission member 22 to impact the force-applying member 32, the force-applying member 32 deforms from the initial state to the stored state. After the trolley assembly 10 moves along the first direction to the predetermined position, the force-applying member 32 returns from the stored state to the initial state and applies a force to the transmission member 22.

[0072] In other words, during the process of the predetermined structure 200 returning to the predetermined frame 300 (closing the sliding retractable door / window 600), initially, the swing arm 21 is in the open position. At this time, the user applies force to the predetermined structure 200 to close the sliding retractable door / window 600, causing the trolley assembly 10 to drive the swing arm 21 to move relative to the predetermined frame 300 along the first direction. During the movement of the trolley assembly 10 along the X1 direction, the transmission component 22 first impacts the force-applying component 32, and then the transmission component 22 continues to move along the X1 direction with the trolley assembly 10 and presses down on the force-applying component 32, causing the force-applying component 32 to deform from the initial state to the stored state. At this time, the force-applying component 32 stores elastic potential energy. When the trolley assembly 10 moves to the predetermined position, it is in place. The force-applying component 32 recovers from its stored state to its initial state and releases its elastic potential energy. The force-applying component 32 applies a force to the transmission component 22. Subsequently, the transmission component 22 is pushed by the released elastic potential energy, and at the same time, the transmission component 22 pushes the swing arm 21 to rotate around the first rotation center 212, so that the swing arm 21 rotates from the open position to the middle position. After completing the force application, the transmission component 22 automatically returns to its initial state, ready for the next triggering without any additional operation. The force-applying component 32 also has the advantages of long fatigue life and high reliability in long-term use.

[0073] When the transmission component 22 impacts the force-applying component 32, the force-applying component 32 absorbs the impact energy through elastic deformation, reducing the noise and vibration generated by the collision. The entire process is smooth and silent, enhancing the quietness of the product and the premium feel of its operation. The force-applying component 32 stores energy upon impact, but releases it only when the trolley assembly 10 moves precisely to the predetermined position. This ensures that the timing of triggering the rotation of the transmission component 22 and the swing arm 21 is precisely determined by the position of the trolley assembly 10, unaffected by the operating speed, ensuring that the transmission component 22 and the swing arm 21 always begin rotating towards the center position from the same position.

[0074] In addition, when the user applies force to move the trolley assembly 10, the resistance generated by the deformation of the force-applying component 32 can be clearly felt through the hand. This clear tactile feedback guides the user to perceive the signal that the position is in place and it is time to release, thus improving the user experience.

[0075] It is understandable that the predetermined position refers to the position where the trolley assembly 10 stops after moving into place along the first direction (e.g., Figure 10 As shown in the figure, at this time, the force-applying component 32 begins to recover to the initial state and applies force to the transmission component 22.

[0076] Furthermore, the positioning member 31 is disposed on one side of the trolley assembly 10 in the width direction (Y direction), and the force-applying member 32 at least partially protrudes from the positioning member 31 and is located between the positioning member 31 and the trolley assembly 10. The force-applying member 32 protrudes towards the trolley assembly 10, facilitating impact from the transmission member 22. At the same time, part of the force-applying member 32 is located within the positioning member 31, ensuring that the force-applying member 32 is not easily accidentally struck by external objects.

[0077] Specifically, the two opposite sides of the trolley assembly 10 in the width direction are a first side 14 and a second side 15, respectively. The first side 14 of the trolley assembly 10 is the side closer to the second end of the swing arm 21 when the swing arm 21 is in the open position. Correspondingly, the second side 15 of the trolley assembly 10 is the side away from the second end of the swing arm 21 when the swing arm 21 is in the open position. In this embodiment, the positioning member 31 is disposed close to the second side 15 of the trolley assembly 10. The positioning member 31 and the trolley assembly 10 are arranged side by side in the Y direction, minimizing the volume of the entire translational retractable sliding mechanism 100, facilitating installation within the limited space of the predetermined frame 300, and achieving efficient space utilization.

[0078] Furthermore, a mounting groove 311 is provided within the positioning member 31. The force-applying member 32 includes a torsion spring 321. The torsion spring 321 is disposed within the mounting groove 311, with its first end abutting against the inner wall of the mounting groove 311 and its second end extending out of the mounting groove 311. The second end of the torsion spring 321 is configured to: under the impact of the transmission member 22, drive the force-applying member 32 to deform from its initial state to a stored state, and apply a force to the transmission member 22 during the process of the force-applying member 32 returning from the stored state to its initial state. During the movement of the transmission member 22 along the X1 direction, the second end of the transmission member 22 first contacts the second end of the torsion spring 321, and then presses down on the second end of the torsion spring 321, causing the torsion spring 321 to deform and store elastic potential energy. When the trolley assembly 10 moves to a predetermined position, the torsion spring 321 releases its elastic potential energy to apply a force to the transmission member 22.

[0079] The second end of the torsion spring 321 extends out of the mounting groove 311 and can directly abut against the transmission component 22. The extension length and direction of the second end of the torsion spring 321 can be precisely designed to ensure that the contact point position of the transmission component 22 is consistent with each impact and force application. The first end of the torsion spring 321 only needs to abut against the inner wall of the mounting groove 311 to form a stable fulcrum, allowing the torsion spring 321 to deform and recover its deformation stably. The torque and angle characteristics of the torsion spring 321 can be precisely controlled by designing parameters such as wire diameter, number of coils, and material. The specific structure of the torsion spring 321 can be improved according to actual needs. The torsion spring 321 is housed in the mounting groove 311 and is physically protected by the groove wall of the mounting groove 311. The mounting groove 311 also constrains the deformation range of the torsion spring 321, preventing excessive torsion that could lead to plastic deformation or breakage.

[0080] In this embodiment, the torsion spring 321 is a double torsion spring. Along the Z-direction, the mounting groove 311 has opposing inner top and inner bottom surfaces. Limiting posts 3111 extend from both the inner top and inner bottom surfaces, and the double torsion spring is sleeved between the limiting posts 3111 on the inner top and inner bottom surfaces. It is understood that the specific structure of the torsion spring 321 can be adjusted according to actual needs, and this embodiment does not impose a unique limitation.

[0081] Furthermore, the transmission component 22 is located between the force-applying component 32 and the swing arm 21. During the process of the force-applying component 32 recovering from its stored state to its initial state and applying force to the transmission component 22: the second end of the transmission component 22 moves relative to the predetermined frame 300 along a predetermined guide trajectory, and the first end of the transmission component 22 drives the swing arm 21 to move, causing the first end of the swing arm 21 to move along a second direction and simultaneously driving the second end of the swing arm 21 to rotate towards the inner side of the predetermined frame 300. The predetermined guide trajectory can limit and guide the movement trajectory of the second end of the transmission component 22, ensuring that the transmission component 22 moves along the same path and with the same posture each time. Under the action of the force-applying component 32, the transmission component 22 drives the swing arm 21 to rotate around the first rotation center 212, causing the swing arm 21 to start rotating from the open position to the intermediate position, ensuring that the swing arm 21 can continue to move to the closed position under inertia.

[0082] Furthermore, the positioning component 31 is provided with a guide groove 312. The opening of the guide groove 312 faces the inner side of the predetermined frame 300, and the extension direction of the guide groove 312 forms a guide trajectory. Under the action of the force-applying component 32, the second end of the transmission component 22 slides along the extension direction of the guide groove 312. The groove wall of the guide groove 312 forms a direct physical constraint on the second end of the transmission component 22, forcing the second end of the transmission component 22 to move along the extension direction of the guide groove 312, ensuring that the movement trajectory of the transmission component 22 is consistent with the design expectation, and providing a stable and reliable foundation for the subsequent compound movement of the swing arm 21. The opening of the guide groove 312 faces the inner side of the predetermined frame 300, naturally matching the second end of the transmission component 22, allowing the second end of the transmission component 22 to directly enter the guide groove 312 without complex turning. At the same time, the opening of the guide groove 312 facing the inner side of the predetermined frame 300 makes the guide groove 312 invisible from the outside, improving aesthetics and dust resistance.

[0083] Optionally, the guide trajectory can also be formed by other structures. For example, a guide rail can be provided on the positioning member 31, and the extension direction of the guide rail forms the guide trajectory. A slider that cooperates with the guide rail can be provided at the second end of the transmission member 22, and the slider slides on the guide rail. The specific structure of the guide trajectory is not limited in this application. As long as the deformation can guide and limit the movement trajectory of the transmission member 22, it is within the protection scope of this application.

[0084] Furthermore, the guide groove 312 extends to a predetermined depth along the width direction of the trolley assembly 10 and is inclined in the second direction. The inclination of the guide groove 312 in the second direction causes the second end of the transmission member 22 to automatically generate a displacement component in the second direction while sliding along the width direction, ensuring that the first end of the swing arm 21 retracts along the second direction. The bottom of the guide groove 312 also prevents excessive movement of the transmission member 22.

[0085] Furthermore, a guide post 221 is provided at the second end of the transmission member 22. Under the action of the force-applying member 32, the first end of the transmission member 22 rotates relative to the trolley assembly 10, and the guide post 221 slides along the extension direction of the guide groove 312. When the trolley assembly 10 is in a predetermined position, the guide post 221 is aligned with the opening of the guide groove 312. When the second end of the transmission member 22 is subjected to the force-applying member 32, the guide post 221 can directly and accurately enter the guide groove 312.

[0086] In some embodiments, the guide post 221 is mounted at the bottom end of the transmission member 22 in the Y direction. The positioning member 31 is also provided with a clearance groove 313, which is located at the top end of the guide groove 312 in the Y direction and communicates with the guide groove 312. When the guide post 221 enters the guide groove 312, the second end of the transmission member 22 enters the clearance groove 313. In this embodiment, the guide groove 312 and the mounting groove 311 are arranged adjacent to each other, and the clearance groove 313 connects the guide groove 312 and the mounting groove 311, which facilitates processing and manufacturing.

[0087] Furthermore, such as Figure 18 As shown, the edge of the second end of the transmission member 22 is provided with abutment 222. When the transmission member 22 rotates to the bottom of the guide groove 312, the abutment 222 abuts against the bottom of the guide groove 312. The abutment 222 abuts against the bottom of the guide groove 312 provides a clear endpoint for the movement of the transmission member 22. When the abutment 222 of the transmission member 22 abuts against the bottom of the guide groove 312, the swing arm 21 rotates to the middle position.

[0088] Specifically, the top abutment 222 is a top abutment plane. When the transmission member 22 rotates to the bottom of the guide groove 312, the top abutment plane fits into the bottom of the guide groove 312 and can prevent the transmission member 22 from continuing to rotate.

[0089] Furthermore, along the width direction of the trolley assembly 10, a guide ramp 314 is provided on the side of the positioning member 31 closest to the trolley assembly 10. That is, the guide ramp 314 is located on the first side 14 of the trolley assembly 10. The guide ramp 314 is located on the side of the force-applying member 32 facing the second direction. Along the first direction, the distance between the guide ramp 314 and the trolley assembly 10 gradually decreases. During the movement of the transmission member 22 in the X1 direction to collide with the torsion spring 321, the guide ramp 314 plays an active guiding role, guiding the transmission member 22 to slide along the guide ramp 314 and precisely slide towards the guide groove 312.

[0090] Furthermore, in some embodiments, a stop block 400 is provided on the predetermined frame 300. When the trolley assembly 10 moves to the predetermined position along the first direction, the end of the trolley assembly 10 stops at the stop block 400. The stop block 400 provides a clear physical endpoint for the trolley assembly 10, ensuring that the trolley assembly 10 stops precisely at the predetermined position each time. With each closing action, the trolley assembly 10 stops at the same position, ensuring that the timing of the force applied by the positioning component 30 to the transmission component 22 is consistent. The stop block 400 can force the trolley assembly 10 to stop, preventing excessive movement of the trolley assembly 10.

[0091] In other embodiments, such as Figure 21 and Figure 22 As shown, the impact block 400 can also be set on the positioning member 31.

[0092] Furthermore, the impact block 400 is provided with a first latching part 401, and the positioning member 31 is provided with a second latching part 315 that cooperates with the first latching part 401. The impact block 400 and the positioning member 31 are connected by the first latching part 401 and the second latching part 315 to form a pre-assembled module, which can be pre-assembled in the production line or material preparation stage. During on-site installation, this module only needs to be installed as a whole on the predetermined frame 300, without having to handle two independent parts separately, reducing installation steps and alignment times, and greatly improving assembly efficiency. The relative position of the impact block 400 and the positioning member 31 is determined by the first latching part 401 and the second latching part 315, ensuring that the position of the impact block 400 stop trolley assembly 10 is precisely matched with the position where the positioning member 31 applies force to the transmission member 22. The first latching part 401 and the second latching part 315 are detachably connected. If the impact block 400 wears out after long-term use, or if the internal components of the positioning part 31 are damaged, they can be easily disassembled and replaced without disassembling the entire sliding mechanism 100, which greatly reduces maintenance costs and workload.

[0093] Optionally, one of the first latching part 401 and the second latching part 315 includes a latching groove, and the other includes a latching protrusion that engages with the latching groove.

[0094] In other embodiments, the positioning block and the impact block 400 are integrally formed.

[0095] Furthermore, such as Figure 9 , Figure 10 As shown, along the second direction, a buffer pad 402 is provided on the side of the impact block 400 near the trolley assembly 10. The elastic properties of the buffer pad 402 make the contact between the trolley assembly 10 and the impact block 400 smoother, making the stopping process of the trolley assembly 10 smoother and more gradual. It also helps to reduce noise during the operation of closing the sliding retractable door / window 600. The buffer pad 402 can absorb impact energy, reduce the impact stress on the end of the trolley assembly 10, the impact block 400, and related connecting parts, and reduce the risk of wear, deformation, or loosening caused by repeated impacts during long-term use. This effectively extends the service life of the sliding retractable lower sliding mechanism 100 and the sliding retractable door / window 600.

[0096] In other embodiments, the aforementioned bumper 400 is not provided (e.g. Figures 30 to 34(As shown). The second end of the torsion spring 321 extends out of the mounting groove 311. During the movement of the transmission member 22 along the X1 direction, after the second end of the torsion spring 321 abuts against the guide post 221 of the transmission member 22, the transmission member 22 presses down on the torsion spring 321, causing the torsion spring 321 to deform from its initial state to its stored state. When the torsion spring 321 is compressed into place, the guide post 221 is aligned with the opening of the guide groove 312. Then, the torsion spring 321 releases its elastic potential energy, pushing the guide post 221 of the transmission member 22 into the guide groove 312. At this time, the second end of the torsion spring 321 blocks the guide post 221 in the guide groove 312 to limit the transmission member 22 and the guide post 221. In this embodiment, when the trolley assembly 10 is in the predetermined position, the torsion spring 321 is compressed into place by the transmission member 22 to recover from its stored state to its initial state.

[0097] Furthermore, such as Figure 11 , Figure 12 and Figure 15 As shown, the rotational connection between the transmission component 22 and the swing arm 21 is the second rotation center 223. Under inertia, the swing arm 21 rotates around the second rotation center 223, causing its first end to move along the second direction. Simultaneously, the second end of the swing arm 21 rotates towards the inner side of the predetermined frame 300, allowing the swing arm 21 to move from the middle position to the closed position. When the transmission component 22, under the action of the force-applying component 32, pushes the swing arm 21 to rotate from the open position around the first rotation center 212 to the middle position, the transmission component 22 abuts against the bottom of the guide groove 312, causing the transmission component 22 to stop rotating. However, the swing arm 21 continues to rotate under inertia. Due to the restriction of the transmission component 22, the rotation center of the swing arm 21 switches from the first rotation center 212 to the second rotation center 223. During the rotation of the swing arm 21 around the second rotation center 223, the first end of the swing arm 21 moves along the second direction, while the second end of the swing arm 21 rotates towards the inner side of the predetermined frame 300. As the swing arm 21 rotates from the middle position to the closed position, the trajectory of the second end of the swing arm 21 changes compared to its trajectory when rotating from the open position to the middle position. This causes the second end of the swing arm 21 to move in the intended posture, aligning with the predetermined frame 300 in the Y direction and entering the inner side of the predetermined frame 300. When the swing arm 21 rotates around the second rotation center 223, the retraction motion of the first end of the swing arm 21 along the second direction and the inward rotation motion of the second end of the swing arm 21 are derived from the same rotational motion and are naturally synchronized. This geometric synchronicity ensures that during the process of the predetermined structure 200 (movable fan) entering the inner side of the predetermined frame 300, the retraction and rotation actions are coordinated and consistent, enabling movement along a better avoidance trajectory and preventing interference between the predetermined structure 200 and the predetermined frame 300.

[0098] When the transmission component 22 drives the swing arm 21 to the middle position, the swing arm 21 is precisely in the initial posture of rotating around the second rotation center 223. At this time, the inertial effect seamlessly takes over, causing the swing arm 21 to naturally begin rotating around the second rotation center 223, making the entire closing action smooth and continuous without any jamming. The precise definition of the first rotation center 212 and the second rotation center 223 makes the kinematic model of the entire translational retractable sliding mechanism 100 clear and explicit, facilitating the optimization of parameters such as the length of the swing arm 21, the position of the rotation center, and the inertial torque through computer simulation, so that the translational retractable sliding mechanism 100 can achieve better motion characteristics. Specifically, the swing arm 21 can rotate around the second rotation center 223 under the inertial action of the predetermined structure 200, causing the second end of the swing arm 21 to drive the predetermined structure 200 to rotate around the mullion 305, so as to move from the middle position to the closed position.

[0099] Furthermore, along the length of the swing arm 21, the second rotation center 223 is located on the side of the rotational connection between the swing arm 21 and the trolley assembly 10, near the second end of the swing arm 21. When the swing arm 21 is in the open position, the second rotation center 223 is located on the side of the rotational connection between the swing arm 21 and the trolley assembly 10 facing the second direction. The second rotation center 223 is offset relative to the first rotation center 212 both along the length of the swing arm 21 towards the second end of the swing arm 21 and in the second direction (the retraction direction of the first end of the swing arm 21). This causes the gravity of the predetermined structure 200 to generate a torque relative to the second rotation center 223 that is always directed toward the inside of the predetermined structure 200. This allows the swing arm 21 to move naturally and smoothly to the closed position, making the inertial action more reliable and efficient. During the inertial motion phase, the gravity of the predetermined structure 200 generates a torque around the second rotation center 223, driving the second end of the swing arm 21 to rotate inward toward the predetermined structure 200, creating a "gravity-assisted closing" effect and achieving automatic closing. The second end of the swing arm 21 undergoes a combined motion of moving along the X2 direction and rotating around the second rotation center 223 relative to the predetermined frame 300, enabling the predetermined structure 200 to enter the predetermined frame 300 with a smaller turning radius compared to existing technologies, effectively preventing interference between the predetermined frame 300 and the predetermined structure 200.

[0100] The first rotation center 212, the second rotation center 223, and the second end of the swing arm 21 form a stable triangular force-bearing structure. During inertial motion, the gravity and inertia of the predetermined structure 200 are rationally distributed through this triangular structure, making the swing arm 21 subjected to balanced forces and smoother motion, effectively preventing the predetermined structure 200 from experiencing uneven loading, shaking, or jamming.

[0101] Understandably, retraction refers to the movement of the first end of the swing arm 21 in the second direction during the process of the swing arm 21 moving from the middle position to the closed position.

[0102] Furthermore, such as Figure 14 and Figure 15 As shown, when the swing arm 21 moves between the open position and the intermediate position, the second end of the swing arm 21 rotates along the first arc trajectory C1 by a first predetermined angle α. When the swing arm 21 moves between the intermediate position and the closed position, the second end of the swing arm 21 rotates along the second arc trajectory C2 by a second predetermined angle β. The second predetermined angle β is greater than the first predetermined angle α. The rotational stroke of the second end of the swing arm 21 from the intermediate position to the closed position is greater than the rotational stroke of the swing arm 21 from the open position to the intermediate position. Most of the stroke of the swing arm 21 is completed by inertia. The transmission component 22 only needs to provide a small initial trigger to the swing arm 21. This fully embodies the design concept of "instant activation and gentle automatic engagement" of this application, and also ensures that the elastic potential energy stored in the torsion spring 321 can meet the power requirements for the predetermined structure 200 to return to the predetermined frame 300.

[0103] Furthermore, the curvature of the first circular arc trajectory C1 is greater than that of the second circular arc trajectory C2. The first circular arc trajectory C1 corresponds to the stage when the swing arm 21 rotates around the first rotation center 212. The larger curvature means that the direction of motion of the second end of the swing arm 21 changes more rapidly during this stage, allowing the predetermined structure 200 to quickly leave the open position and rapidly adjust its posture. The second circular arc trajectory C2 corresponds to the stage of inertial rotation of the swing arm 21 around the second rotation center 223. The smaller curvature means that the direction of motion changes more slowly, making the movement of the predetermined structure 200 smoother and gentler when approaching the closed position. This allows the predetermined structure 200 to gradually adjust to a path aligned with the predetermined frame 300 in the Y direction before entering the predetermined frame 300, preventing interference between the predetermined structure 200 and the predetermined frame 300.

[0104] Further, see Figure 13 The swing arm assembly 20 also includes a transmission limiting component 24. The transmission limiting component 24 is configured to abut against the transmission member 22 when the trolley assembly 10 moves in a first direction, thereby limiting the transmission member 22 to a preset position. If the transmission member 22 shifts due to gravity, vibration, or accidental contact when the swing arm 21 is in the open position and the predetermined structure 200 is sliding laterally, it will be unable to accurately engage with the force-applying component 32 at the predetermined position. The transmission limiting component 24, through physical abutment, firmly constrains the transmission member 22 to the preset position, ensuring that the transmission member 22 is in the intended initial posture at the start of each closing action, providing precise starting conditions for the subsequent accurate movement of the swing arm 21 to the closed position under inertia. The transmission limiting component 24 also helps to assemble the transmission member 22 in the correct position.

[0105] Furthermore, the transmission limiting component 24 includes a first limiting portion 241 and a second limiting portion 242. The first limiting portion 241 is disposed at the edge of the transmission member 22. The second limiting portion 242 is disposed within the trolley assembly 10. When the trolley assembly 10 moves along the first direction, the first limiting portion 241 stops at the second limiting portion 242. The first limiting portion 241 moves with the transmission member 22, and the second limiting portion 242 moves with the trolley assembly 10, but their relative positions are relatively stationary when the trolley assembly 10 moves along the first direction, ensuring that the transmission member 22 is always in a preset position during the movement of the trolley assembly 10 along the first direction.

[0106] Furthermore, the first limiting part 241 includes a limiting step 2411. The second limiting part 242 includes a rod 2421. When the trolley assembly 10 moves along the first direction, the rod 2421 abuts against the limiting step 2411. In this embodiment, the opening of the limiting step 2411 faces the first side 14 of the trolley assembly 10. The rod 2421 abuts against the limiting step 2411, ensuring that the transmission member 22 does not rotate relative to the swing arm 21 when the swing arm 21 is in the open position.

[0107] Furthermore, the transmission limiting component 24 includes an elastic element 243. The elastic element 243 is disposed on the swing arm 21, and is configured to abut against the transmission member 22 when the trolley assembly 10 moves in the first direction to apply an elastic force to the transmission member 22. The elastic element 243 is disposed on the side of the transmission member 22 facing the second direction, and the first limiting portion 241 is disposed on the side of the transmission member 22 facing the first direction. The elastic element 243 and the first limiting portion 241 provide multi-directional limiting for the transmission member 22. The elastic deformation of the elastic element 243 can automatically compensate for positional deviations, manufacturing tolerances, and wear gaps after long-term use between the transmission member 22 and the swing arm 21.

[0108] Optionally, such as Figure 19 As shown, the elastic member 243 includes a first lever arm 2431, a second lever arm 2432, and a third lever arm 2433 connected in sequence. The stop portion 23 or the swing arm 21 has a limiting groove 232. In this embodiment, the stop boss 231 is provided with the limiting groove 232. The first lever arm 2431 is embedded in the limiting groove 232, the second lever arm 2432 abuts against the outer surface of the stop portion 23, and the third lever arm 2433 is configured such that it deforms to approach the second lever arm 2432 when the transmission member 22 presses against the stop portion 23, and returns to its original shape after the stop portion 23 separates from the transmission member 22.

[0109] The elastic element 243 can also be a flexible element such as a bar spring or rubber. As long as the deformation mode can abut against the transmission element 22 to apply elastic force to the transmission element 22 when the trolley assembly 10 moves in the first direction, it is within the protection scope of this application.

[0110] Furthermore, when the swing arm 21 moves from the closed position to the middle position under the opening action, the first end of the swing arm 21 moves along the first direction, while the second end of the swing arm 21 rotates in the direction protruding from the predetermined frame 300. When the swing arm 21 moves from the middle position to the open position under the opening action, the transmission component 22 rotates relative to the trolley assembly 10 with the first end of the swing arm 21. When the user wants to open the sliding retractable door / window 600 (to move the predetermined structure 200 out to the outside of the predetermined frame 300), the user applies an opening action to the predetermined structure 200, and the swing arm 21 rotates around the second rotation center 223, causing the first end of the swing arm 21 to move along the first direction, while the second end of the swing arm 21 rotates in the direction protruding from the predetermined frame 300, so that the predetermined structure 200 can smoothly disengage from the predetermined frame 300 and unfold outward when opened, avoiding interference with the predetermined frame 300 and achieving a smooth opening process. When the swing arm 21 moves from the middle position to the open position, the swing arm 21 rotates around the first rotation center 212. The transmission component 22 rotates with the first end of the swing arm 21 relative to the trolley assembly 10. The user does not need to operate or reset the transmission component 22 separately; the transmission component 22 is naturally driven by the swing arm 21 and automatically moves out of the guide groove 312. In other words, this embodiment ensures that the predetermined structure 200 will not interfere with the predetermined frame 300 during the process of moving the predetermined structure 200 out of the predetermined frame 300 and returning to the predetermined frame 300. The predetermined structure 200 is provided with a handle 201, and the user can drive the predetermined structure 200 to move by applying force to the handle 201.

[0111] Furthermore, the trolley assembly 10 is provided with an accommodating space 16. For example... Figure 12 The first end of the swing arm 21 is located within the accommodating space 16. A clearance notch 214 is provided on the side of the swing arm 21 closest to the predetermined frame 300, and the clearance notch 214 is located near the second end of the swing arm 21. When the swing arm 21 is in the closed position, the trolley assembly 10 is at least partially located within the clearance notch 214. When the swing arm 21 is in the closed position, the trolley assembly 10 is at least partially located within the clearance notch 214, which reduces the volume of the translational retractable sliding mechanism 100 in the Y direction, ensuring that the translational retractable sliding mechanism 100 can be located inside the predetermined frame 300 when the swing arm 21 is in the closed position. When the swing arm 21 is in the closed position (the predetermined structure 200 is located inside the predetermined frame 300), the first end face 202 of the predetermined structure 200 and the second end face 306 of the predetermined frame 300 are in the same plane, and the translational retractable sliding mechanism 100 is in a hidden state that is not visible from the outside.

[0112] Optionally, the stop boss 231 is fixed to the top of the swing arm 21. Along the Z direction, the connecting shaft 13 passes through the vehicle body 11, and the first end of the stop boss 231 and the swing arm 21 is sleeved on the connecting shaft 13. The bottom end of the connecting shaft 13 is connected to the vehicle body 11 through a rotating member 18, which is embedded in the inner bottom wall of the accommodating space 16.

[0113] On the other hand, this application embodiment also provides a sliding retractable door / window 600, which includes the aforementioned sliding retractable downward sliding mechanism 100, predetermined structure 200, and predetermined frame 300. The trolley assembly 10 is mounted on the predetermined frame 300, and the second end of the swing arm 21 is connected to the predetermined structure 200. Therefore, this sliding retractable door / window 600 includes all the technical effects of the aforementioned sliding retractable downward sliding mechanism 100. Since the technical effects of the sliding retractable downward sliding mechanism 100 have been described in detail above, they will not be repeated here.

[0114] like Figure 5 As shown, a driven mechanism 500 can also be installed within the predetermined frame 300. The driven mechanism 500 does not include the positioning component 30, transmission component 22, and transmission limiting component 24 found in the aforementioned translational retractable sliding mechanism 100; its other structures are identical to those of the translational retractable sliding mechanism 100. The driven mechanism 500 is connected to the translational retractable sliding mechanism 100 in this application via a coupling 501 and moves along the first or second direction with the translational retractable sliding mechanism 100. The coupling 501 connects between the trolley assembly of the driven mechanism 500 and the trolley assembly 10 of the translational retractable sliding mechanism 100. It is understood that the translational retractable sliding mechanism 100 may have one, two, or more than two components, and the driven mechanism 500 may also have one or more components. The number of driven mechanisms 500 and translational retractable sliding mechanisms 100 is not specifically limited in this application.

[0115] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0116] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0117] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A translational retractable downward sliding mechanism, characterized in that, include: A trolley assembly (10) is used to be mounted on a predetermined frame (300) and is capable of moving along a first direction and a second direction opposite to the first direction of the predetermined frame (300); The swing arm assembly (20) includes a swing arm (21) and a transmission member (22). The first end of the swing arm (21) is rotatably connected to the trolley assembly (10). The second end of the swing arm (21) opposite to the first end is at least used for connection with a predetermined structure (200). The transmission member (22) is connected to the swing arm (21). The transmission member (22) is configured such that when the trolley assembly (10) moves to a predetermined position relative to the predetermined frame (300) along the first direction, the swing arm (21) is driven by an external force to move relative to the trolley assembly (10), so that the first end of the swing arm (21) moves along the second direction and simultaneously drives the second end of the swing arm (21) to rotate toward the inner side of the predetermined frame (300).

2. The translational retraction sliding mechanism according to claim 1, characterized in that, The swing arm (21) has an open position in which its second end protrudes out of the predetermined frame (300), a closed position in which its second end moves to the inside of the predetermined frame (300), and an intermediate position between the open position and the closed position. Wherein, after the transmission component (22) is driven by an external force to move the swing arm (21) relative to the trolley assembly (10) from the open position to the middle position, the swing arm (21) can move from the middle position to the closed position under the action of inertia; During the process of the swing arm (21) moving from the middle position to the closed position: the first end of the swing arm (21) moves along the second direction, while driving the second end of the swing arm (21) to rotate toward the inner side of the predetermined frame (300).

3. The translational retraction sliding mechanism according to claim 2, characterized in that, The rotatable connection between the swing arm (21) and the trolley assembly (10) is the first rotation center (212). The transmission component (22) is driven by an external force to rotate the swing arm (21) around the first rotation center (212), so that the swing arm (21) moves from the open position to the middle position.

4. The translational retraction sliding mechanism according to claim 2, characterized in that, The swing arm assembly (20) also includes: Stop (23), the stop (23) is disposed on the swing arm (21); The first end of the transmission member (22) is rotatably connected to the swing arm (21). When the swing arm (21) is in the open position, at least a portion of the first end of the transmission member (22) stops at the stop portion (23). The second end of the transmission member (22) opposite to the first end is subjected to an external force to drive the swing arm (21) to rotate toward the inner side of the predetermined frame (300) along with the first end of the transmission member (22), so that the swing arm (21) moves from the open position to the intermediate position.

5. The translational retraction sliding mechanism according to claim 4, characterized in that, The swing arm (21) and / or the stop (23) are provided with a receiving groove (213), and when the swing arm (21) is in the open position, at least a portion of the first end of the transmission member (22) is located within the receiving groove (213); and / or, Along the length direction of the swing arm (21), the first end of the transmission member (22) is located on the side of the stop part (23) near the second end of the swing arm (21), and the stop part (23) is located on the side of the transmission member (22) facing the second direction, and the second end of the transmission member (22) can be driven by external force to move the swing arm (21) from the open position to the middle position.

6. The translational retraction sliding mechanism according to claim 1, characterized in that, Also includes: Positioning component (30) is used to fix the predetermined frame (300). When the trolley assembly (10) moves relative to the predetermined frame (300) along the first direction to the predetermined position, the positioning component (30) applies a force to the transmission member (22).

7. The translational retraction sliding mechanism according to claim 6, characterized in that, The positioning component (30) includes: Positioning element (31), the positioning element (31) is used to fix to the predetermined frame (300); Force-applying component (32), the force-applying component (32) is disposed on the positioning component (31), the force-applying component (32) has an initial state and a force-storing state in which it deforms under pressure; When the trolley assembly (10) moves along the first direction and drives the transmission member (22) to collide with the force-applying member (32), the force-applying member (32) deforms from the initial state to the stored state; when the trolley assembly (10) moves along the first direction to the predetermined position, the force-applying member (32) returns from the stored state to the initial state and applies a force to the transmission member (22).

8. The translational retraction sliding mechanism according to claim 7, characterized in that, The positioning member (31) is disposed on one side of the trolley assembly (10) in the width direction, and the force-applying member (32) at least partially protrudes from the positioning member (31) and is located between the positioning member (31) and the trolley assembly (10); and / or, The positioning member (31) is provided with a mounting groove (311), and the force-applying member (32) includes a torsion spring (321). The torsion spring (321) is disposed in the mounting groove (311), and the first end of the torsion spring (321) abuts against the inner wall of the mounting groove (311). The second end of the torsion spring (321) extends out of the mounting groove (311), and the second end of the torsion spring (321) is configured to: drive the force-applying member (32) to deform from the initial state to the stored state under the impact of the transmission member (22), and apply a force to the transmission member (22) during the process of the force-applying member (32) returning from the stored state to the initial state; And / or, The transmission component (22) is located between the force-applying component (32) and the swing arm (21). During the process of the force-applying component (32) recovering from the stored state to the initial state and applying force to the transmission component (22): the second end of the transmission component (22) moves relative to the predetermined frame (300) along a predetermined guide trajectory, and the first end of the transmission component (22) drives the swing arm (21) to move, so that the first end of the swing arm (21) moves along the second direction and simultaneously drives the second end of the swing arm (21) to rotate toward the inner side of the predetermined frame (300); and / or, A stop block (400) is provided on the predetermined frame (300) or the positioning member (31). When the trolley assembly (10) moves to the predetermined position along the first direction, the end of the trolley assembly (10) stops at the stop block (400).

9. The translational retraction sliding mechanism according to claim 8, characterized in that, The positioning member (31) is provided with a guide groove (312), the opening of the guide groove (312) faces the inner side of the predetermined frame (300), the extension direction of the guide groove (312) forms the guide trajectory, and the second end of the transmission member (22) slides along the extension direction of the guide groove (312) under the action of the force-applying member (32).

10. The translational retraction sliding mechanism according to claim 9, characterized in that, The guide groove (312) extends to a predetermined depth along the width direction of the trolley assembly (10) and is inclined toward the second direction; and / or, The second end of the transmission component (22) is provided with a guide post (221), and the first end of the transmission component (22) rotates relative to the trolley assembly (10) under the action of the force-applying component (32), while the guide post (221) slides along the extension direction of the guide groove (312); and / or, The second end of the transmission member (22) is provided with an abutment (222). When the transmission member (22) rotates to the bottom of the guide groove (312), the abutment (222) abuts against the bottom of the guide groove (312).

11. The translational retraction sliding mechanism according to claim 2, characterized in that, The rotational connection between the transmission component (22) and the swing arm (21) is the second rotation center (223). The swing arm (21) rotates around the second rotation center (223) under inertia and drives its first end to move along the second direction. At the same time, the second end of the swing arm (21) rotates toward the inside of the predetermined frame (300) so that the swing arm (21) moves from the middle position to the closed position.

12. The translational retraction sliding mechanism according to claim 11, characterized in that, Along the length of the swing arm (21), the second rotation center (223) is located on the side near the second end of the swing arm (21) at the rotational connection between the swing arm (21) and the trolley assembly (10); When the swing arm (21) is in the open position, the second rotation center (223) is located on the side facing the second direction at the rotational connection between the swing arm (21) and the trolley assembly (10).

13. The translational retraction sliding mechanism according to claim 2, characterized in that, When the swing arm (21) moves between the open position and the intermediate position, the second end of the swing arm (21) rotates along the first arc trajectory by a first predetermined angle, and when the swing arm (21) moves between the intermediate position and the closed position, the second end of the swing arm (21) rotates along the second arc trajectory by a second predetermined angle. Wherein, the second predetermined angle is greater than the first predetermined angle; and / or, The curvature of the first circular arc trajectory is greater than the curvature of the second circular arc trajectory.

14. The translational retractable downward sliding mechanism according to any one of claims 1 to 13, characterized in that, The swing arm assembly (20) also includes: A transmission limiting component (24) is configured to abut against the transmission member (22) when the trolley assembly (10) moves in the first direction, so as to limit the transmission member (22) to a preset position.

15. The translational retraction sliding mechanism according to claim 14, characterized in that, The transmission limiting component (24) includes a first limiting part (241) and a second limiting part (242). The first limiting part (241) is disposed at the edge of the transmission member (22), and the second limiting part (242) is disposed within the trolley assembly (10). When the trolley assembly (10) moves along the first direction, the first limiting part (241) stops at the second limiting part (242); and / or, The transmission limiting component (24) includes an elastic element (243), which is disposed on the swing arm (21). The elastic element (243) is configured to abut against the transmission component (22) when the trolley assembly (10) moves along the first direction to apply an elastic force to the transmission component (22).

16. The translational retracting downward sliding mechanism according to any one of claims 2 to 13, characterized in that, When the swing arm (21) moves from the closed position to the intermediate position under the opening action, the first end of the swing arm (21) moves along the first direction, while the second end of the swing arm (21) rotates in the direction protruding from the predetermined frame (300); when the swing arm (21) moves from the intermediate position to the open position under the opening action, the transmission member (22) rotates relative to the trolley assembly (10) with the first end of the swing arm (21); and / or, The trolley assembly (10) is provided with a receiving space (16), the first end of the swing arm (21) is located in the receiving space (16), the swing arm (21) is provided with a clearance notch (214) on the side near the predetermined frame (300), and the clearance notch (214) is provided near the second end of the swing arm (21). When the swing arm (21) is in the closed position, the trolley assembly (10) is at least partially located in the clearance notch (214).

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