A push-pull bracket

Abstract

This utility model discloses a push-pull bracket, belonging to the technical field of washing machine brackets. It solves the problem of requiring considerable force to turn the handle, making operation inconvenient. The technical solution mainly includes an outer track, an inner track, a handle, and two rolling elements. The outer and inner tracks can slide relative to each other. Both ends of the inner track have guide grooves, and both ends of the outer track have limiting grooves. The rolling elements are located in the guide groove and limiting groove at the same end. The handle is hinged to one end of the outer track. A connecting rod is provided between the handle and the inner track, with one end hinged to the handle and the other end hinged to the inner track. When the handle is in use, it is perpendicular to the inner track, and the two rolling elements are located at the end of the guide groove closest to the handle. When the handle is in the concealed state, both rolling elements are located at the end of the guide groove furthest from the handle and at the top of the limiting groove. This utility model is mainly characterized by labor-saving operation, stable structure, and easy switching between usage states.

Description

Technical Field

[0001] This utility model relates to the technical field of washing machine brackets, and in particular to a push-pull bracket. Background Technology

[0002] As home appliances become increasingly feature-rich, the size and weight of large appliances such as washing machines continue to grow, bringing numerous inconveniences to their transportation, installation, and use. Installation and delivery personnel expend considerable physical effort during handling, resulting in low work efficiency and increased labor costs. Furthermore, users also face difficulties in moving appliances when they need to reposition them themselves.

[0003] Prior art CN202220839778.1 discloses an invisible mobile support, including an inner track, an outer track, a handle, wheel A, and wheel B. The inner track includes track A and track B, and the outer track includes track C and track D. One end of track A is fitted with track C and slides relative to track C. The other end of track A is located inside track B and slides relative to track B. The outer end of track B away from track A is fitted with track D and slides relative to track D. Wheel A is arranged on the front and rear sides of track C. The axle passes through the track A and the track C and is movable up and down. The wheels B are provided on both the front and rear sides of the track D. The axle of the wheels B passes through the track B and the track D and is movable up and down. One end of the handle is hinged to the end of the track B away from the track A and the end of the track D away from the track C. The handle drives the wheels A and B to move up and down synchronously, so that the lower end of the wheel A is lower than or higher than the lower edge of the track C, and the lower end of the wheel B is lower than or higher than the lower edge of the track D.

[0004] In the aforementioned prior art CN202220839778.1, only one end of the handle, which is hinged to rails B and D, is L-shaped. The two ends of the L-shaped handle are respectively hinged to the ends of rails B and D, thereby enabling the rotation of the handle to move the wheels up and down. From the attached drawings of prior art CN202220839778.1, it can be clearly seen that both ends of the L-shape are relatively short. When it is necessary to move a large washing machine, the large washing machine has a large load on the support, and a large force is required to rotate the handle to move the wheels up and down. This is inconvenient for workers or users to operate. Utility Model Content

[0005] The purpose of this invention is to provide a push-pull bracket that solves the problem of requiring a large amount of force to turn the handle, making it inconvenient to operate. It is easy to operate, has a stable structure, and is easy to switch between use modes.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a push-pull bracket, comprising an outer rail, an inner rail, a handle, and two rolling elements. The outer rail is sleeved on the inner rail, and the outer rail and inner rail are slidable relative to each other. Guide grooves are provided at both ends of the inner rail, and limiting grooves are provided at both ends of the outer rail corresponding to the guide grooves. The limiting grooves extend perpendicular to the length direction of the outer rail. The two rolling elements correspond one-to-one with the two guide grooves and the two limiting grooves, and the rolling elements are located at the same end of the inner rail and the outer rail. The rolling elements slide relative to each other on the inner rail and the outer rail, and slide relative to the guide grooves and the limiting grooves. When sliding relative to the outer track, the two rolling elements slide synchronously along the guide groove. The handle is hinged to one end of the outer track. A connecting rod is provided between the handle and the inner track. One end of the connecting rod is hinged to the handle, and the other end is hinged to the end of the inner track. The handle has a hidden state and a working state. Rotating the handle switches between the working state and the hidden state. When the handle is in the working state, the handle is perpendicular to the inner track, and both rolling elements are located at the end of the guide groove near the handle and at the bottom end of the limiting groove. When the handle is in the hidden state, both rolling elements are located at the end of the guide groove away from the handle and at the top end of the limiting groove.

[0007] Furthermore, the connecting rod is a curved rod, and the hinge connection between the handle and the outer rail is located on the inner side of the curved rod.

[0008] Furthermore, the handle is provided with a connecting plate that extends along the rotation direction of the handle, and the connecting rod is hinged to the side of the connecting plate away from the handle.

[0009] Furthermore, the connecting plate is a triangular plate, one side wall of the connecting plate is integrally formed with the handle, and the connecting rod is hinged to the end of the connecting plate away from the handle.

[0010] Furthermore, the guide groove includes a parallel groove and an inclined groove. The inclined groove extends along the length of the inner track and is inclined downward in a direction away from the handle. The parallel groove is located on the side of the inclined groove away from the handle and is connected to the lower end of the inclined groove.

[0011] Furthermore, the rolling element includes a connecting shaft and rolling wheels rotatably disposed at both ends of the connecting shaft. The connecting shaft passes through the guide groove and the limiting groove, and the two rolling wheels are disposed on both sides of the outer track.

[0012] Furthermore, the outer track includes a first plate and a second plate integrally formed on both sides of the first plate. The two second plates are located on the same side of the first plate and are parallel to each other. The first plate and the two second plates form a receiving space to accommodate the inner track. Limiting grooves are provided at both ends of the second plate.

[0013] Furthermore, the first plate has connecting parts at both ends for connecting with the object to be supported, and the connecting parts are flat.

[0014] Furthermore, the connecting part is provided with an adjustment groove extending along the length direction of the inner track, and an installation component for fastening connection with the object to be supported is slidably provided in the adjustment groove.

[0015] Furthermore, the middle part of the inner track is provided with a sliding clearance groove, and the middle part of the outer track is provided with a stabilizing rod, which passes through the sliding clearance groove.

[0016] The linkage design between the handle and the connecting rod enables the rolling element to switch positions in the guide groove and the limit groove. This allows the bracket to be switched between states simply by turning the handle, without the need for excessive operating force. It has the advantages of being labor-saving, convenient, structurally stable, and having a strong load-bearing capacity. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram illustrating the usage state of a push-pull bracket according to this utility model;

[0019] Figure 2 This is a schematic diagram of the installation of the connecting rod in this utility model;

[0020] Figure 3 This is an exploded view of the push-pull bracket of this utility model;

[0021] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This is a schematic diagram showing the installation of the rolling element and the inner track in the working state of this utility model;

[0023] Figure 6 This is a schematic diagram of the installation of the rolling element and the inner track in the concealed state in this utility model.

[0024] Figure 7 This is a schematic diagram of the hidden state of the push-pull bracket of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0026] The terms "first," "second," etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects, not to describe a specific order or sequence. Even if "second" is used before a technical feature for distinction, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, and Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Containing X, Y, and Z," "Containing X, Y, and Z" means that all three X, Y, and Z are included; "Containing X, Y, or Z" means that one of X, Y, and Z is included; "Containing X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are included.

[0027] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0028] like Figures 1 to 7 As shown, this utility model provides a push-pull bracket, including an outer rail 1, an inner rail 2, a handle 3, and two rolling elements 4. The outer rail 1 is sleeved on the inner rail 2 and can slide relative to it. Figure 2 and Figure 3 As shown, the inner track 2 has guide grooves 21 at both ends, and the outer track 1 has corresponding limiting grooves 11 at both ends. The rolling element 4 is located at the same end of both the inner track 2 and the outer track 1. When the inner track 2 and the outer track 1 slide relative to each other, the rolling element 4 slides relative to the guide grooves 21 and the limiting grooves 11. The handle 3 is hinged to the end of the outer track 1 and to the inner track 2 via a connecting rod 5. Rotating the handle 3 drives the inner track 2 to slide via the connecting rod 5, causing the rolling element 4 to move along the guide grooves 21 to the top or bottom of the limiting grooves 11, thus switching the handle 3 between its hidden and active states. Specifically, the guide groove 21 refers to the groove at the end of the inner track 2, which can be milled to form a combination of inclined and horizontal sections to constrain the sliding trajectory of the rolling element 4. The limiting groove 11 refers to the vertical groove at the end of the outer track 1, which can be manufactured using a stamping process to limit the lifting height of the rolling element 4. The connecting rod 5 is a rigid connecting rod that connects the handle 3 and the inner rail 2. It can be made of metal. The two ends of the connecting rod 5 are provided with hinge holes and are hinged to the handle 3 and the inner rail 2 respectively through pins. It is used to transmit rotational torque and convert it into linear displacement of the inner rail 2.

[0029] Specifically, when the handle 3 is rotated from its concealed state to its vertical operating state, the connecting rod 5 pushes the inner rail 2 to slide outward, forcing the rolling element 4 to move along the guide groove 21 towards the handle 3. Because the limiting groove 11 vertically constrains the lifting and lowering of the rolling element 4, the rolling element 4 reaches the bottom of the limiting groove 11 at the front end of the guide groove 21, forming a stable support structure. When the handle 3 is rotated in the opposite direction, the inner rail 2 retracts inward, and the rolling element 4 slides along the guide groove 21 to the rear end and engages with the top of the limiting groove 11. At this time, the length direction of the handle 3 is parallel to the length direction of the outer rail 1. The connection design between the inclined and horizontal sections of the guide groove 21 ensures a smooth transition for the rolling element 4 during sliding.

[0030] Compared with the prior art CN202220839778.1, in the prior art, the L-shaped handle 3 is directly hinged to the end of the track. Since the two ends of the L-shaped handle 3 cannot rotate relative to each other, rotating the handle 3 will generate an additional bending moment on the inner track 2, increasing the friction between the inner track 2 and the outer track 1. In this embodiment, a two-stage transmission mechanism is formed by connecting rod 5. The additional bending moment generated on the inner track 2 during the rotation of the handle 3 is decomposed into the pushing and pulling force of the connecting rod 5 and the sliding component of the inner track 2 through the relative rotation of the connecting rod 5 and the handle 3. Under the condition that the pushing and pulling force of the inner track 2 is the same, the operating torque of the handle 3 is effectively reduced, so that the delivery personnel can complete the switching of the bracket state with less force. The rolling part 4 is raised and lowered synchronously through the linkage mechanism, avoiding track deflection caused by unilateral jamming. The compact structure in the hidden state reduces the risk of interference between the bracket and other objects during transportation.

[0031] Specifically, in another embodiment, such as Figure 3 and Figure 4 As shown, the guide groove 21 includes a parallel groove 211 and an inclined groove 212. The inclined groove 212 extends along the length of the inner track 2 and slopes downwards away from the handle 3. The parallel groove 211 is located on the side of the inclined groove 212 away from the handle 3 and communicates with the lower end of the inclined groove 212. Specifically, the inclined groove 212 refers to an inclined groove at the end of the inner track 2, which can be implemented using a straight groove structure that forms an acute angle with the axis of the inner track 2. Its inclination angle can be adjusted based on the movement trajectory of the rolling element 4. The parallel groove 211 refers to a horizontal groove that is parallel to the axis of the inner track 2, which can be implemented using a straight groove structure that is flush with the lower end of the inclined groove 212.

[0032] Specifically, when the handle 3 switches from the hidden state to the active state, the inner rail 2 is pulled by the connecting rod 5 to slide into the outer rail 1, and the rolling element 4 moves along the inclined groove 212 towards the handle 3. Figure 4 and Figure 5As shown, the downward-sloping arrangement of the inclined groove 212 allows the rolling element 4 to slide naturally under the influence of gravity and the pushing force of the inner track 2, reducing operating resistance. When the rolling element 4 reaches the end of the inclined groove 212, it enters the parallel groove 211 and remains in a horizontal position, preventing displacement due to gravity. When the handle 3 is rotated in the reverse direction, as... Figure 4 and Figure 6 As shown, the rolling element 4 slides along the parallel groove 211 to the starting end of the inclined groove 212, and then moves upward along the inclined groove 212 to the higher end of the inclined groove 212, achieving a smooth transition of the bidirectional motion trajectory. This solves the problem of the rolling element 4 moving unevenly and causing difficult operation when the handle 3 is switching states. The inclined layout of the inclined groove 212 is adapted to the extension and retraction direction of the inner track 2 during the linkage of the handle 3, so that the movement trajectory of the rolling element 4 and the rotation of the handle 3 form a spatial match. The parallel groove 211 provides end positioning support, ensuring that the rolling element 4 can stably stay at the predetermined positions at both ends of the guide groove 21 in both states.

[0033] In this embodiment, as Figure 1 and Figure 7 As shown, the connecting rod 5 is a curved rod, and the hinge connection between the handle 3 and the outer rail 1 is located on the inner side of the curved rod. Specifically, a curved rod refers to a rod with an arc-shaped structure, which can be made by stamping or injection molding of metal materials, and its radius of curvature can be adjusted according to actual force requirements. The hinge connection being located on the inner side of the curved rod means that the rotation fulcrum of the handle 3 and the outer rail 1 is relative to the concave arc surface of the curved rod. The arc structure of the curved rod can change the force transmission path, and the inner hinge point shortens the length of the resistance arm, thereby reducing the torque required to rotate the handle 3.

[0034] Specifically, when a rotational force is applied to handle 3, the curvature of the bending rod shifts the direction of the force between connecting rod 5 and inner rail 2, creating a more optimized lever ratio. When the hinge point is located inside the bending rod, the distance between the pivot point and the force application point of the bending rod is shortened, reducing the resistance arm. Applying the same force at this point yields a larger effective torque. For example, during the switching of handle 3, the bending rod converts the rotational motion of handle 3 into the translational displacement of inner rail 2 along outer rail 1. Its curved surface structure disperses the stress concentration of the rigid rod, preventing structural deformation due to excessive local stress. Switching the support state requires less operating force when handling heavy objects, avoiding jamming caused by structural rigidity. Simultaneously, the curvature design of the bending rod enhances the bending strength of connecting rod 5, ensuring structural stability during long-term use.

[0035] In another embodiment, such as Figure 2As shown, a connecting plate 31 is provided on the handle 3, extending along the rotation direction of the handle 3. The connecting rod 5 is hinged to the side of the connecting plate 31 away from the handle 3. Specifically, the connecting plate 31 refers to a plate-like structure fixed to the handle 3 and extending in the rotation direction. It can be made of stamped metal sheet, and its extension direction is consistent with the rotation trajectory of the handle 3, used to move the hinge point of the connecting rod 5 outward. The hinge point position refers to the connection between the connecting rod 5 and the connecting plate 31, which can be achieved using a pin or pivot structure. This position is located at the end of the connecting plate 31 away from the main body of the handle 3, and a longer lever arm is formed by extending the distance between the hinge point and the rotation axis of the handle 3.

[0036] Specifically, when the handle 3 is rotated, the connecting rod 5 undergoes linear displacement under the traction of the hinge point, thereby driving the relative sliding between the inner track 2 and the outer track 1. Since the extension direction of the connecting plate 31 coincides with the rotation trajectory, the movement path of the hinge point is extended, thus generating a larger torque output at the same rotation angle. On the other hand, by adding an extended connecting plate 31, the hinge point is moved to a position away from the main body of the handle 3, and the operating torque increases significantly with the extension of the lever arm while maintaining the same rotation angle; especially when moving heavy objects such as washing machines, the operator can drive the rolling part 4 to rise and fall with a smaller force, effectively solving the problem of laborious operation under heavy load conditions.

[0037] In this embodiment, further, such as Figure 2 and Figure 7As shown, the connecting plate 31 is configured as a triangular plate, with one side wall of the connecting plate 31 integrally formed with the handle 3. The connecting rod 5 is hinged to the end of the connecting plate 31 furthest from the handle 3. Specifically, the triangular plate refers to a plate-like structure with three boundaries, utilizing the geometric stability of the triangular structure to enhance the torsional resistance of the connecting part 12. Integral forming means that the connecting plate 31 and the handle 3 are formed as a single structure through casting, injection molding, or welding processes. Specifically, an integral injection molding process can be used to eliminate gaps in the separate assembly, thereby improving structural strength. The end furthest from the handle 3 refers to the location of the vertex of the triangular plate. This can be achieved by setting a hinge hole at the end of the longest side of the triangular plate, reducing the operating torque by extending the lever arm. When an external force is applied to the handle 3, the vertex and base of the triangle form a stable force transmission path, avoiding plastic deformation caused by local stress concentration. The integral forming of the connecting plate 31 and the handle 3 creates a continuous material distribution at their interface, eliminating assembly gaps caused by traditional bolt connections or riveting, and ensuring the integrity of the torque transmission path during rotation. By setting the hinge point at the vertex of the triangle, the force direction of the connecting rod 5 coincides with the diagonal of the triangle. This geometrical approach converts the operating torque into a linear traction force on the connecting rod 5, thereby reducing rotational resistance. External forces are evenly distributed across the entire area of ​​the connecting plate 31, preventing deformation accumulation caused by localized stress concentration. Simultaneously, the distal hinge design effectively reduces the required operating force by extending the lever arm.

[0038] In another embodiment, such as Figure 5 and Figure 6 As shown, the rolling element 4 includes a connecting shaft 41 and rolling wheels 42 rotatably disposed at both ends of the connecting shaft 41. The connecting shaft 41 passes through the guide groove 21 and the limiting groove 11, and the two rolling wheels 42 are respectively disposed on both sides of the outer track 1. Specifically, the connecting shaft 41 is a rigid support component that passes through the guide groove 21 and the limiting groove 11. The connecting shaft 41 forms a cross-track support structure to withstand bidirectional loads. In use, when it is necessary to move heavy objects such as washing machines, the rolling wheels 42 can roll relative to the ground to reduce the difficulty for workers and users in moving such objects.

[0039] In another embodiment, such as Figure 4 and Figure 5As shown, the outer track 1 includes a first plate 101 and two second plates 102 integrally formed on both side walls of the first plate 101. The two second plates 102 are located on the same side of the first plate 101 and are parallel to each other. A receiving space 103 for accommodating the inner track 2 is formed between the first plate 101 and the two second plates 102. Limiting grooves 11 are provided at both ends of the second plates 102. Specifically, the first plate 101 refers to the flat plate structure constituting the main body of the outer track 1, which can be formed by stamping metal sheet, serving as the basic bearing surface for supporting the sliding of the inner track 2. The second plate 102 refers to the side wall structure that is perpendicularly connected to and parallel to the two sides of the first plate 101, which can be integrally formed with the first plate 101 by bending process, used to form a closed frame for accommodating the inner track 2. The receiving space 103 refers to the U-shaped channel formed by the first plate 101 and the two second plates 102 on both sides, the width of which can match the thickness of the inner track 2, preventing track misalignment by limiting the horizontal displacement of the inner track 2.

[0040] Specifically, the first plate 101, as the main body of the outer track 1, forms a stable U-shaped structure with the second plates 102 on both sides. The connection gaps are eliminated through an integral molding process, enhancing the overall bending resistance. The inner track 2 is confined within the receiving space 103 formed by the first plate 101 and the second plates 102. During sliding, the second plates 102 on both sides provide a wrapping guide for the inner track 2, preventing track deviation due to uneven load.

[0041] In this embodiment, as Figure 7 As shown, the first plate 101 has connecting portions 12 at both ends for connecting with the object to be supported. The connecting portions 12 are flat. Specifically, the connecting portion 12 refers to a fixing structure that is integrally formed with the end of the first plate 101 of the outer track 1. It can be achieved by bending the plate or forming it with a mold to increase the contact area with the object to be supported.

[0042] Specifically, the connecting part 12 forms a surface contact with the surface of the object to be supported through its flat structure. Under the load of heavy objects such as washing machines, the pressure distribution on the contact surface is more uniform, avoiding local stress concentration that could lead to deformation or loosening of the connection. The planar structure of the connecting part 12 can be adapted to support surfaces with different curvatures, such as the curved edge of the washing machine shell or a flat base. Multi-point fixation is achieved by bolts passing through the flat connecting part 12.

[0043] Furthermore, such as Figure 7As shown, the connecting part 12 is provided with an adjustment groove 122 extending along the length of the inner track 2. An installation component 121 for fastening to the object to be supported is slidably disposed within the adjustment groove 122. Specifically, the adjustment groove 122 is an elongated through hole or groove formed on the surface of the connecting part 12 and parallel to the axis of the inner track 2. It can be achieved by milling or stamping. Its extension direction is consistent with the moving direction of the inner track 2, guiding the installation component 121 to move along a predetermined trajectory. The installation component 121 is a metal block with threaded holes or a locking structure, specifically achieved by a bolt and slider assembly. By adjusting its position within the adjustment groove 122, the horizontal displacement of the connection point with the object to be supported can be adjusted. This achieves flexible adjustment of the connection position between the push-pull bracket and the object to be supported, adapting to hole deviations and space constraints in different installation environments, reducing repeated debugging operations during installation, and improving installation efficiency and adaptability.

[0044] In another embodiment, such as Figure 3 As shown, the inner track 2 has a sliding clearance groove 22 in its middle section, and the outer track 1 has a stabilizing rod 13 in its middle section. The stabilizing rod 13 passes through the sliding clearance groove 22. Specifically, the sliding clearance groove 22 refers to a long strip-shaped groove structure opened in the middle of the length direction of the inner track 2, and the stabilizing rod 13 refers to a rigid support component set in the middle section of the outer track 1. It can be implemented by welding or riveting a metal round rod into the inner cavity of the outer track 1. The stabilizing rod 13 passes through the sliding clearance groove 22 to form a lateral constraint, and its diameter forms a clearance fit with the width of the sliding clearance groove 22, which allows the inner track 2 to slide relative to each other while maintaining contact limitation.

[0045] Specifically, when the inner track 2 and the outer track 1 undergo relative expansion and contraction, the stabilizer rod 13 moves freely along the length of the inner track 2 within the sliding clearance groove 22. When bearing load, the stabilizer rod 13, through contact with the side walls of the sliding clearance groove 22, forms a lateral support force to resist track bending deformation. During the pushing and pulling process, the stabilizer rod 13 maintains a fixed connection with the outer track 1, creating a rigid connection point at the center of the inner and outer tracks 1, effectively dispersing the bending moment borne by the center of the track. Furthermore, the outer peripheral wall of the stabilizer rod 13 contacts the upper and lower side walls of the sliding clearance groove 22, effectively preventing vertical displacement of the inner track 2 and outer track 1 during relative sliding.

[0046] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A push-pull bracket, comprising an outer rail, an inner rail, a handle, and two rolling elements, wherein the outer rail is sleeved on the inner rail, and the outer rail and the inner rail are slidable relative to each other; both ends of the inner rail are provided with guide grooves, and both ends of the outer rail are provided with limiting grooves corresponding to the guide grooves, the limiting grooves extending perpendicular to the length direction of the outer rail; the two rolling elements correspond one-to-one with the two guide grooves and the two limiting grooves, and the rolling elements are located at the same end of the inner rail and the outer rail; the rolling elements slide relative to the inner rail and the outer rail, and slide relative to the guide grooves and the limiting grooves; when the inner rail slides relative to the outer rail, the two rolling elements slide synchronously along the guide grooves, characterized in that... The handle is hinged to one end of the outer track. A connecting rod is provided between the handle and the inner track. One end of the connecting rod is hinged to the handle, and the other end is hinged to the end of the inner track. The handle has a hidden state and a working state. Rotating the handle switches between the working state and the hidden state. When the handle is in the working state, the handle and the inner track are perpendicular to each other, and both rolling elements are located at the end of the guide groove near the handle and at the bottom end of the limiting groove. When the handle is in the hidden state, both rolling elements are located at the end of the guide groove away from the handle and at the top end of the limiting groove.

2. The push-pull bracket according to claim 1, characterized in that, The connecting rod is a curved rod, and the hinge connection between the handle and the outer rail is located on the inside of the curved rod.

3. The push-pull bracket according to claim 1, characterized in that, The handle is provided with a connecting plate that extends along the rotation direction of the handle, and the connecting rod is hinged to the side of the connecting plate away from the handle.

4. The push-pull bracket according to claim 3, characterized in that, The connecting plate is a triangular plate, and one side wall of the connecting plate is integrally formed with the handle. The connecting rod is hinged to the end of the connecting plate away from the handle.

5. The push-pull bracket according to claim 1, characterized in that, The guide groove includes a parallel groove and an inclined groove. The inclined groove extends along the length of the inner track and is inclined downward in a direction away from the handle. The parallel groove is located on the side of the inclined groove away from the handle and is connected to the lower end of the inclined groove.

6. The push-pull bracket according to claim 1, characterized in that, The rolling element includes a connecting shaft and rolling wheels rotatably disposed at both ends of the connecting shaft. The connecting shaft passes through a guide groove and a limiting groove, and the two rolling wheels are disposed on both sides of the outer track.

7. The push-pull bracket according to claim 1, characterized in that, The outer track includes a first plate and a second plate integrally formed on both sides of the first plate. The two second plates are located on the same side of the first plate and are parallel to each other. The first plate and the two second plates form a receiving space to accommodate the inner track. Limiting grooves are provided at both ends of the second plate.

8. The push-pull bracket according to claim 7, characterized in that, The first plate has connecting parts at both ends for connecting to the object to be supported, and the connecting parts are flat.

9. The push-pull bracket according to claim 8, characterized in that, The connecting part is provided with an adjustment groove extending along the length of the inner track, and an installation part for fastening connection with the object to be supported is slidably provided in the adjustment groove.

10. The push-pull bracket according to claim 1, characterized in that, The inner track has a sliding clearance groove in the middle part, and the outer track has a stabilizing rod in the middle part, with the stabilizing rod passing through the sliding clearance groove.

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