Floor spring

Abstract

The floor spring comprises a shell, a rotating column and a connecting column, a containing groove is formed in the shell, a positioning column is arranged at the bottom of the containing groove, and a first limiting block and an elastic limiting piece are arranged on the side wall of the containing groove; the positioning column is sleeved with the rotating column, a limiting groove and an abutting block are arranged on the rotating column in the radial direction, and the included angle between the central axis of the rotating column and the limiting groove and the abutting block at the two ends is 180 degrees; a fixing hole used for being connected with an external door is formed in the axial direction, away from the rotating column, of the connecting column. When the door rotates by 90 degrees in the first turning direction, the connecting column drives the rotating column to rotate by 90 degrees in the first turning direction, and the elastic limiting piece is clamped in the limiting groove. And when the door rotates by 90 degrees in the second steering direction, the connecting column drives the rotating column to rotate by 90 degrees in the second steering direction, and the abutting block abuts against the first limiting block so as to close the door and prevent the door from rotating in the second steering direction. Therefore, the overall structure of the floor spring is greatly simplified, the number of parts is reduced, the manufacturing and maintenance cost is reduced, and the installation and debugging process is more convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of door control, and in particular to a floor spring. BACKGROUND

[0002] In the field of door and window systems, floor springs are widely used for smooth opening and closing control of doors, especially in automatic or semi-automatic door closing systems. Traditional floor spring mechanisms usually include a spring driving device that can control the opening and closing actions of the door to ensure smooth movement of the door within a specified opening and closing angle. The main purpose of such devices is to provide smooth movement of the door to ensure convenient operation and safety during use. Generally, floor spring systems rely on the coordinated action of spring pressure, limiting components and guide devices to maintain the correct positioning of the door.

[0003] However, although the existing floor spring systems have been widely used, there are still some shortcomings in the opening and closing process of the door. In particular, for the control of the door opening to a fixed angle (such as 90°), the existing systems often cannot provide accurate and smooth positioning. In existing designs, when the door is opened to a certain angle, the mechanical components responsible for limiting the movement of the door may not be able to effectively and stably provide a fixed stop position, and the door is prone to slipping or instability.

[0004] Some designs can achieve accurate positioning when the door is opened to a fixed angle (such as 90°), which allows the door to stay at 90° by using complex mechanical limiting devices. However, such designs usually rely on a large number of components, including multiple limiting mechanisms, spring assemblies and guide structures. The complex structure not only increases the manufacturing cost, but also makes the installation and debugging process tedious and time-consuming. In addition, the increase in the number of components also easily leads to an increase in system failure rate, increasing maintenance costs and making it difficult to meet the needs of modern door and window systems for simplicity, reliability and economy.

[0005] Therefore, it is necessary to propose an improved floor spring that ensures the door can accurately stay at the 90° open position and ensures smooth and accurate opening and closing of the door, while having fewer component quantities and simpler installation processes, thereby reducing costs and improving system reliability. CONTENT OF THE INVENTION

[0006] The purpose of the present application is to overcome the shortcomings of the prior art and propose a floor spring that ensures the door can accurately stay at the 90° open position and ensures smooth and accurate opening and closing of the door, while having fewer component quantities and simpler installation processes, thereby reducing costs and improving system reliability.

[0007] The present application is achieved by the following technical solutions:

[0008] The present application proposes a floor spring, comprising:

[0009] The shell is fixed to the ground, and the shell is provided with a receiving groove facing away from the ground. The bottom of the receiving groove is provided with a positioning column, and the sidewall of the receiving groove is provided with a first limiting block and an elastic limiting piece.

[0010] The rotating column is sleeved on the positioning column, and the rotating column is radially provided with a limiting groove and an abutting block. The included angle between the limiting groove and the abutting block at both ends of the central axis of the rotating column is 180°.

[0011] The connecting column is provided in the axial direction away from the receiving groove of the rotating column. The connecting column and the rotating column are located on the same central axis. The connecting column is provided with a fixing hole in the axial direction away from the rotating column for external connection.

[0012] When the door is first turned to rotate 90°, the connecting column drives the rotating column to first turn to rotate 90°, and the elastic limiting piece is clamped in the limiting groove.

[0013] When the door is secondly turned to rotate 90°, the connecting column drives the rotating column to secondly turn to rotate 90°, and the abutting block abuts against the first limiting block to close the door and prevent the door from secondly turning to rotate.

[0014] In an embodiment of the present application, the ground spring further comprises a reset mechanism, one end of the reset mechanism being rotationally connected with the rotating column, and the other end being rotationally connected with the sidewall of the receiving groove.

[0015] When the elastic limiting piece is disengaged from the limiting groove, the reset mechanism drives the rotating column to secondly turn to rotate 90° to make the door secondly turn to rotate 90°.

[0016] In an embodiment of the present application, the reset mechanism comprises:

[0017] The connecting rod is rotationally connected with the rotating column.

[0018] The sliding cylinder is rotationally connected with the sidewall of the receiving groove in the axial direction. One end of the sliding cylinder away from the sidewall of the receiving groove is provided with a sliding groove.

[0019] The sliding column is fixedly connected with the connecting rod at one end and extends into the sliding groove at the other end.

[0020] The elastic member is arranged in the sliding groove. One end of the elastic member is connected with the bottom surface of the sliding groove, and the other end is connected with the sliding column.

[0021] When the rotating column is first turned to rotate 90°, the elastic member moves from a free state to a compressed state.

[0022] When the rotating column rotates 90° in the second direction, the elastic member moves from the compressed state to the free state.

[0023] In an embodiment of the present application, the side wall of the accommodating groove is provided with a second limiting block, and the second limiting block and the elastic limiting sheet are located on the same side.

[0024] When the elastic limiting sheet is clamped in the limiting groove, and the rotating column rotates in the first direction, the sliding cylinder abuts against the second limiting block to prevent the door from rotating in the first direction.

[0025] In an embodiment of the present application, the bottom surface of the limiting groove is an arc-shaped concave surface, the elastic limiting sheet has a clamping head, one end of the clamping head facing the rotating column is an arc-shaped convex surface, and the arc-shaped convex surface is matched with the arc-shaped concave surface.

[0026] When the elastic limiting sheet is clamped in the limiting groove, the arc-shaped convex surface closely abuts against the arc-shaped concave surface to increase the clamping stability and reduce the sliding friction.

[0027] When the elastic limiting sheet is separated from the limiting groove, the arc-shaped convex surface slides along the arc-shaped concave surface to realize smooth separation and reduce the impact force when separating.

[0028] In an embodiment of the present application, the circumferential surface of the rotating column pushes the clamping head to move in a direction away from the rotating column.

[0029] When the limiting groove faces the clamping head, the elastic limiting sheet drives the clamping head to move in a direction towards the limiting groove to clamp the clamping head in the limiting groove.

[0030] In an embodiment of the present application, the elastic limiting sheet comprises:

[0031] A fixed head is arranged on the side wall of the accommodating groove.

[0032] A spring sheet is connected with the fixed head at one end, and connected with the clamping head at the end away from the fixed head.

[0033] In an embodiment of the present application, the connecting column protrudes from the accommodating groove, the ground spring further comprises a cover body, the cover body is flush with the ground, the cover body is provided with a avoiding hole, the cover body covers the accommodating groove, and the connecting column protrudes from the cover body through the avoiding hole.

[0034] Compared with the prior art, the present application has the following beneficial effects:

[0035] The ground spring comprises a shell, a rotating column and a connecting column. The shell is fixed to the ground. The shell is provided with a containing groove. The containing groove faces away from the ground. The bottom of the containing groove is provided with a positioning column. The sidewall of the containing groove is provided with a first limiting block and an elastic limiting sheet. The rotating column is sleeved on the positioning column. The radial direction of the rotating column is provided with a limiting groove and an abutting block. The included angle between the limiting groove and the abutting block on the central axis of the rotating column to the two ends is 180°. The connecting column is arranged in the axial direction of the rotating column away from the containing groove. The connecting column and the rotating column are located on the same central axis. The axial direction of the connecting column away from the rotating column is provided with a fixing hole for connecting with an external door. The rotating directions of the first rotation and the second rotation are opposite. When the door rotates 90° in the first rotation, the connecting column drives the rotating column to rotate 90° synchronously, and the 90° positioning is realized through the clamping of the elastic limiting sheet and the limiting groove, so that the door is opened to 90° and positioned. Precise and stable positioning is realized, and the unstable positioning problem caused by mechanical sliding or jamming in the prior art is avoided. When the door rotates 90° in the second rotation, the connecting column also drives the rotating column to rotate 90° in the second rotation, and the abutting of the abutting block and the first limiting block prevents the door from rotating reversely too much, and the closing effect of the door is realized. The arc-shaped matching structure of the elastic limiting sheet and the limiting groove significantly reduces the sliding friction, and improves the stability and durability of the system operation. In addition, the stopping effect of the first limiting block and the abutting block ensures that the door will not rotate reversely after being closed, and improves the reliability of the reset. Compared with the ground spring design in the prior art which depends on multiple limiting mechanisms and complex structures, the ground spring of the present application greatly simplifies the overall structure, reduces the number of parts, reduces the manufacturing and maintenance costs, and makes the installation and debugging process more convenient.

[0036] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating laborious work.

[0038] Figure 1 The ground spring provided by an embodiment of the present application is shown in a top view (equivalent to the door closed state);

[0039] Figure 2 The ground spring provided by an embodiment of the present application is shown in a top view (equivalent to the door closed state);

[0040] Figure 3 FIG. 6 is a sectional view of a P-P portion of FIG. 5; Figure 2

[0041] Figure 4 FIG. 7 is a perspective view of a ground spring according to an embodiment of the present application (corresponding to a door closed state, with a cover hidden);

[0042] Figure 5 FIG. 8 is a perspective view of a ground spring according to an embodiment of the present application (corresponding to a door opened state, with a cover hidden);

[0043] Figure 6 FIG. 9 is a perspective view of an elastic limiting sheet according to an embodiment of the present application;

[0044] Figure 7 FIG. 10 is an exploded perspective view of a reset mechanism according to an embodiment of the present application.

[0045] BRIEF DESCRIPTION OF THE DRAWINGS

[0046] 10, ground spring; 100, shell; 110, accommodating groove; 120, positioning column; 130, first limiting block; 140, elastic limiting sheet; 141, clamping head; 142, spring sheet; 143, fixed head; 150, second limiting block; 200, rotating column; 210, limiting groove; 220, abutting block; 300, connecting column; 310, fixed hole; 400, reset mechanism; 410, connecting rod; 420, sliding cylinder; 421, sliding groove; 430, sliding column; 440, elastic member; 500, cover. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0048] In order to make those skilled in the art better understand the technical solutions in the present application, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0049] ​It should be noted that when an element is referred to as being "fixed" or "set" on another component, it can be directly on the other component or indirectly on the other component; when a component is referred to as being "connected" to another component, it can be directly connected to the other component or indirectly connected to the other component.

[0050] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0051] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of", "several" is two or more, unless otherwise explicitly specified.

[0052] It should be understood that the structure, proportion, size and the like shown in the drawings of the present application are only used to cooperate with the content disclosed in the description, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application, and therefore do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0053] Please refer to Figures 1 to 6 The present application provides a ground spring 10, which comprises a shell 100, a rotating column 200 and a connecting column 300, the shell 100 is fixed on the ground, the shell 100 is provided with a containing groove 110, the containing groove 110 is away from the ground, the bottom of the containing groove 110 is provided with a positioning column 120, and the sidewall of the containing groove 110 is provided with a first limiting block 130 and an elastic limiting sheet 140; the rotating column 200 is sleeved on the positioning column 120, the radial direction of the rotating column 200 is provided with a limiting groove 210 and an abutting block 220, and the included angle between the limiting groove 210 and the abutting block 220 from the central axis of the rotating column 200 to both ends is 180°; the connecting column 300 is arranged in the axial direction away from the containing groove 110 of the rotating column 200, the connecting column 300 and the rotating column 200 are located on the same central axis, and the axial direction away from the rotating column 200 of the connecting column 300 is provided with a fixing hole 310 for connecting with an external door.

[0054] When the door rotates 90° in the first direction, the connecting column 300 drives the rotating column 200 to rotate 90° in the first direction, and the elastic limiting sheet 140 is clamped in the limiting groove 210; when the door rotates 90° in the second direction, the connecting column 300 drives the rotating column 200 to rotate 90° in the second direction, and the abutting block 220 abuts against the first limiting block 130 to close the door and prevent the door from rotating in the second direction. The rotating directions of the first direction and the second direction are opposite.

[0055] Specifically, the shell 100 is fixed on the ground, which serves to accommodate other components and provide overall structural support. The shell 100 is provided with a containing groove 110 for accommodating the rotating column 200 and related components, and ensuring that these components can operate smoothly. The bottom of the containing groove 110 is provided with a positioning column 120, and the rotating column 200 is sleeved on the positioning column 120 at the bottom of the shell 100 and freely rotates around the positioning column 120 as the center. In addition, the sidewall of the containing groove 110 is designed with a first limiting block 130 and an elastic limiting sheet 140.

[0056] When the door is closed, the abutting block 220 on the rotating column 200 abuts against the first limiting block 130, providing a mechanical stop function to prevent the door from rotating in the reverse direction, ensuring that the door is stable and reliable after being closed. When the door is opened to 90°, the elastic limiting sheet 140 cooperates with the limiting groove 210 on the rotating column 200 to provide a clamping function, preventing the door from slipping or swinging back at 90°, and enhancing the positioning stability. The elastic limiting sheet 140 is designed to be elastic, ensuring that it can smoothly disengage and reset when the rotating column 200 rotates.

[0057] When the door rotates 90° in the first direction, the connecting column 300 drives the rotating column 200 to rotate 90° synchronously, and realizes 90° positioning through the clamping of the elastic limiting sheet 140 and the limiting groove 210, achieving the effect of opening the door to 90° and positioning. When the door rotates 90° in the second direction, the connecting column 300 also drives the rotating column 200 to rotate 90° in the second direction, and prevents the door from rotating in the reverse direction by the abutting of the abutting block 220 and the first limiting block 130, while achieving the effect of closing the door.

[0058] In summary, the ground spring 10 can achieve accurate and stable positioning when the door is opened to 90°, avoiding the instability of positioning caused by mechanical sliding or jamming in the prior art. At the same time, the arc-shaped matching structure of the elastic limiting sheet 140 and the limiting groove 210 significantly reduces the sliding friction, improving the stability and durability of the system operation. In addition, the stopping effect of the first limiting block 130 and the abutting block 220 ensures that the door does not reverse rotate after closing, improving the reliability of the reset. Compared with the ground spring 10 design in the prior art which relies on multiple limiting mechanisms and complex structures, the ground spring 10 of the present application greatly simplifies the overall structure, reduces the number of parts, reduces the manufacturing and maintenance costs, and makes the installation and debugging process more convenient. Overall, the ground spring 10 of the present application provides a ground spring 10 with simple structure, accurate positioning, low cost and reliable use, which is suitable for wide application in modern door and window systems.

[0059] Please refer to Figure 4 and Figure 5 In an embodiment, the ground spring 10 further comprises a reset mechanism 400, one end of which is rotationally connected with the rotating column 200, and the other end is rotationally connected with the side wall of the accommodating groove 110; when the elastic limiting sheet 140 is disengaged from the limiting groove 210, the reset mechanism 400 drives the rotating column 200 to rotate 90° in the second direction, so as to rotate the door 90° in the second direction.

[0060] Specifically, the reset mechanism 400 is used to automatically drive the rotating column 200 to rotate 90° in the second direction after the elastic limiting sheet 140 is disengaged from the limiting groove 210, so as to realize the automatic closing function of the door. One end of the reset mechanism 400 is rotationally connected with the rotating column 200, and the other end is rotationally connected with the side wall of the accommodating groove 110. When the door is opened to 90° and positioned by the elastic limiting sheet 140 and the limiting groove 210, the reset mechanism 400 is in a static state; when the door is manually closed and the elastic limiting sheet 140 is disengaged from the limiting groove 210, the reset mechanism 400 drives the rotating column 200 to rotate in the opposite direction under the action of elasticity, so as to return the door to the closed position. This design naturally connects the opening and closing actions of the door through the reset mechanism 400, and the reset function of the door can be realized without external assistance, thereby optimizing the user experience and improving the reliability of the door closing.

[0061] Please refer to Figure 7In an embodiment, the reset mechanism 400 comprises a connecting rod 410, a sliding cylinder 420, a sliding column 430 and an elastic member 440, the connecting rod 410 is rotationally connected with the rotating column 200; the sliding cylinder 420 is rotationally connected with the side wall of the accommodating groove 110 in the axial direction, the sliding cylinder 420 is provided with a sliding groove 421 at the end away from the side wall of the accommodating groove 110; the sliding column 430 is fixedly connected with the connecting rod 410 at one end and extends into the sliding groove 421 at the other end; the elastic member 440 is arranged in the sliding groove 421, one end of the elastic member 440 is connected with the bottom surface of the sliding groove 421, and the other end of the elastic member 440 is connected with the sliding column 430.

[0062] When the rotating column 200 is rotated 90° in the first direction, the elastic member 440 moves from the free state to the compressed state; when the rotating column 200 is rotated 90° in the second direction, the elastic member 440 moves from the compressed state to the free state.

[0063] Specifically, the reset mechanism 400 is composed of the connecting rod 410, the sliding cylinder 420, the sliding column 430 and the elastic member 440, one end of the connecting rod 410 is rotationally connected with the rotating column 200, the other end of the connecting rod 410 is fixedly connected with the sliding column 430, the sliding column 430 extends into the sliding groove 421 and moves in the axial direction along the sliding groove 421 in the sliding cylinder 420. One end of the sliding cylinder 420 is rotationally connected with the side wall of the accommodating groove 110, which ensures the stable support and smooth sliding of the sliding cylinder 420. The elastic member 440 is arranged in the sliding groove 421, one end of the elastic member 440 is fixedly connected with the bottom surface of the sliding groove 421, and the other end of the elastic member 440 is connected with the sliding column 430.

[0064] When the rotating column 200 is rotated 90° in the first direction, the connecting rod 410 drives the sliding column 430 to move towards the bottom of the sliding groove 421, so that the elastic member 440 is gradually compressed and stored energy from the free state, and the elastic limiting piece 140 is clamped in the limiting groove 210; when the rotating column 200 is rotated 90° in the second direction, the elastic limiting piece 140 is disengaged from the limiting groove 210, the elastic member 440 recovers from the compressed state to the free state, releases the elastic force to drive the sliding column 430 to move, and then drives the rotating column 200 to reset through the connecting rod 410.

[0065] Please refer to Figure 4 and Figure 5 In an embodiment, the side wall of the accommodating groove 110 is provided with a second limiting block 150, the second limiting block 150 is located at the same side as the elastic limiting piece 140.

[0066] When the elastic limiting piece 140 is clamped in the limiting groove 210 and the rotating column 200 is rotated in the first direction, the sliding cylinder 420 abuts against the second limiting block 150 to prevent the door from rotating in the first direction.

[0067] Specifically, the side wall of the accommodating groove 110 is provided with a second limiting block 150, which is arranged on the same side of the elastic limiting sheet 140. When the elastic limiting sheet 140 is clamped in the limiting groove 210 of the rotating column 200, and the rotating column 200 attempts to continue rotating in the first rotating direction, the sliding cylinder 420 will abut against the second limiting block 150, thereby effectively preventing the rotating column 200 from continuing to rotate in the first rotating direction. This design utilizes the mechanical stop function of the second limiting block 150 to avoid the rotating column 200 from exceeding the designed 90° position due to external force, and at the same time, protects the elastic limiting sheet 140 and the elastic member 440 in the reset mechanism 400 from being excessively compressed and damaged.

[0068] Please refer to Figure 4 and Figure 6 In an embodiment, the bottom surface of the limiting groove 210 is an arc-shaped concave surface, and the clamping head 141 of the elastic limiting sheet 140 has an arc-shaped convex surface at one end thereof facing the rotating column 200, which is adapted to the arc-shaped concave surface.

[0069] When the elastic limiting sheet 140 is clamped in the limiting groove 210, the arc-shaped convex surface closely abuts against the arc-shaped concave surface to increase the stability of clamping and reduce the sliding friction; when the elastic limiting sheet 140 is disengaged from the limiting groove 210, the arc-shaped convex surface slides along the arc-shaped concave surface to achieve smooth disengagement and reduce the impact force during disengagement.

[0070] Specifically, the bottom surface of the limiting groove 210 is an arc-shaped concave surface, and the clamping head 141 of the elastic limiting sheet 140 has an arc-shaped convex surface at one end thereof facing the rotating column 200, which is adapted to the arc-shaped concave surface. When the elastic limiting sheet 140 is clamped in the limiting groove 210, the arc-shaped convex surface closely abuts against the arc-shaped concave surface, thereby effectively increasing the stability of clamping and preventing the door from slipping when rotating in the first rotating direction to the 90° open position. At the same time, when the elastic limiting sheet 140 is disengaged from the limiting groove 210, the arc-shaped convex surface can smoothly slide along the arc-shaped concave surface to reduce the friction and impact force generated during disengagement. This design realizes smooth transition during clamping and disengagement, and ensures the smoothness and stability of the door during opening and closing.

[0071] Please refer to Figure 4 and Figure 5 In an embodiment, the circumferential surface of the rotating column 200 drives the clamping head 141 to move in a direction away from the rotating column 200.

[0072] When the limiting groove 210 faces the clamping head 141, the elastic limiting sheet 140 drives the clamping head 141 to move in a direction towards the limiting groove 210, so as to clamp the clamping head 141 in the limiting groove 210.

[0073] Specifically, the dynamic cooperation process of the elastic limiting sheet 140 and the limiting groove 210 designs a functional area on the circumferential surface of the rotating column 200 that interacts with the clamping head 141. When the rotating column 200 rotates along the first turning direction, the circumferential surface thereof, but not the limiting groove 210, will push the clamping head 141 to move away from the rotating column 200, so that the elastic limiting sheet 140 gradually separates from the limiting groove 210, ensuring a smooth separation process; when the rotating column 200 rotates to the position where the limiting groove 210 of the rotating column 200 is again towards the clamping head 141, the elastic limiting sheet 140 drives the clamping head 141 to move towards the limiting groove 210 under the action of its own elastic force, thereby accurately clamping the clamping head 141 in the limiting groove 210. Through the pushing action of the circumferential surface of the rotating column 200 and the automatic reset characteristics of the elastic limiting sheet 140, this design realizes the automatic separation and clamping of the limiting sheet, ensuring the dynamic stability of the door during the rotation along the first turning direction and the second turning direction.

[0074] Please refer to Figure 6 In an embodiment, the elastic limiting sheet 140 includes a fixed head 143, a spring sheet 142, and a clamping head 141, the fixed head 143 is arranged on the side wall of the accommodating groove 110; one end of the spring sheet 142 is connected with the fixed head 143, and the other end thereof, which is away from the fixed head 143 and faces away from the fixed head 143, is connected with the clamping head 141.

[0075] Specifically, the fixed head 143 is arranged on the side wall of the accommodating groove 110, for stabilizing the mounting position of the elastic limiting sheet 140; one end of the spring sheet 142 is connected with the fixed head 143, and the other end thereof is connected with the clamping head 141, and the side thereof, which faces away from the fixed head 143, is connected with the clamping head 141, thereby giving the elastic limiting sheet 140 necessary elastic deformation capability. During the rotation of the rotating column 200 along the first turning direction or the second turning direction, the spring sheet 142 can flexibly respond to drive the clamping head 141 to move away from or towards the limiting groove 210, thereby realizing the dynamic separation and accurate clamping of the clamping head 141.

[0076] Please refer to Figure 1 and Figure 2 In an embodiment, the connecting column 300 extends out of the accommodating groove 110, and the door closer 10 further includes a cover body 500, the cover body 500 is flush with the ground, the cover body 500 is provided with an avoiding hole, the cover body 500 is arranged on the accommodating groove 110, and the connecting column 300 extends out of the cover body 500 through the avoiding hole.

[0077] Specifically, the cover body 500 is flush with the ground and has an avoiding hole for the connecting column 300 to pass through. The connecting column 300 extends out of the accommodating groove 110 and extends out of the cover body 500 through the avoiding hole to be fixedly connected with the outside door. The design of the cover body 500 provides covering protection for the accommodating groove 110 and the components inside the accommodating groove 110, avoids foreign matters, dust or moisture from entering the accommodating groove 110 to affect the normal operation of the ground spring 10; on the other hand, the structure design that the cover body 500 is flush with the ground ensures the overall aesthetic appearance and safety in use of the ground spring 10 and the ground, avoids pedestrians from tripping and other accidents due to uneven ground.

[0078] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ground spring, characterized by, The utility model provides a door hinge, which comprises a housing fixed to the ground, a receiving groove is formed in the housing, the receiving groove faces away from the ground, a positioning column is arranged at the bottom of the receiving groove, a first limiting block and an elastic limiting sheet are arranged on the side wall of the receiving groove, a rotating column is sleeved on the positioning column, a limiting groove and an abutting block are formed in the radial direction of the rotating column, the included angle between the limiting groove and the abutting block on the central axis of the rotating column to the two ends is 180 DEG, a connecting column is arranged on the axial direction of the rotating column away from the receiving groove, the connecting column and the rotating column are located on the same central axis, a fixing hole for connecting with an external door is formed in the axial direction of the connecting column away from the rotating column, when the door is first rotated by 90 DEG, the connecting column drives the rotating column to be first rotated by 90 DEG, and the elastic limiting sheet is clamped in the limiting groove, when the door is secondly rotated by 90 DEG, the connecting column drives the rotating column to be secondly rotated by 90 DEG, and the abutting block abuts against the first limiting block to close the door and prevent the door from being secondly rotated. The ground spring further comprises a reset mechanism, one end of the reset mechanism is rotationally connected with the rotating column, and the other end is rotationally connected with the side wall of the receiving groove, when the elastic limiting sheet is separated from the limiting groove, the reset mechanism drives the rotating column to be secondly rotated by 90 DEG to make the door secondly rotate by 90 DEG. The reset mechanism comprises a connecting rod rotationally connected with the rotating column, a sliding cylinder rotationally connected with the side wall of the receiving groove in the axial direction, a sliding groove being formed in one end of the sliding cylinder away from the side wall of the receiving groove, a sliding column fixedly connected with the connecting rod at one end and extending into the sliding groove at the other end, and an elastic member arranged in the sliding groove, one end of the elastic member being connected with the bottom surface of the sliding groove, and the other end being connected with the sliding column, when the rotating column is first rotated by 90 DEG, the elastic member moves from a free state to a compressed state, and when the rotating column is secondly rotated by 90 DEG, the elastic member moves from the compressed state to the free state. The side wall of the receiving groove is provided with a second limiting block, the second limiting block is located on the same side as the elastic limiting sheet, when the elastic limiting sheet is clamped in the limiting groove and the rotating column is first rotated, the sliding cylinder abuts against the second limiting block to prevent the door from being first rotated. The bottom surface of the limiting groove is an arc-shaped concave surface, the elastic limiting sheet has a clamping head, one end of the clamping head away from the rotating column is an arc-shaped convex surface, the arc-shaped convex surface is matched with the arc-shaped concave surface, when the elastic limiting sheet is clamped in the limiting groove, the arc-shaped convex surface is closely attached to the arc-shaped concave surface to increase the stability of clamping and reduce sliding friction, and when the elastic limiting sheet is separated from the limiting groove, the arc-shaped convex surface slides along the arc-shaped concave surface to realize smooth separation and reduce the impact force when separating. The circumferential surface of the rotating column pushes the clamping head to move away from the rotating column, when the limiting groove faces the clamping head, the elastic limiting sheet drives the clamping head to move towards the limiting groove to clamp the clamping head in the limiting groove.

2. The geospring of claim 1, wherein, ​ ​ 3. The geospring of claim 2, wherein, ​ ​ ​ ​ ​ ​ ​ 4. The geospring of claim 3, wherein, ​ ​ 5. The geospring of claim 1, wherein, ​ ​ ​ 6. The geospring of claim 5, wherein, ​ ​ 7. The geospring of claim 6, wherein, The elastic limiting sheet comprises: A fixed head arranged on the side wall of the accommodating groove; A spring sheet, one end of which is connected with the fixed head, and the other end thereof, which is away from the fixed head, is connected with the clamping head.

8. The geospring of claim 1, wherein, The connecting column extends out of the accommodating groove, and the ground spring further comprises a cover body which is flush with the ground, the cover body is provided with a avoiding hole, the cover body is arranged on the accommodating groove, and the connecting column extends out of the cover body through the avoiding hole.

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