A spring-loaded damping hinge

Abstract

This utility model relates to the field of damping hinge technology, specifically a spring-loaded damping hinge, comprising a housing, a damping spring, and a spindle. A spring-loaded module is provided between the housing and a limiting plate. The spring-loaded module includes a torsion spring and a limiting plate. A mounting cavity is formed internally within the housing, with a mounting hole at its lower end. A limiting hole is located at the lower end of the mounting cavity. The damping spring is assembled within the mounting cavity. The front section of the spindle is inserted into the damping spring, and a limiting surface one is located in its middle section. An arc-shaped limiting groove is located on the outer side of the limiting plate, and a limiting surface two corresponding to the limiting surface one is located on its inner side. The limiting plate is fitted onto the middle of the spindle and forms a limiting engagement with the spindle through the limiting surface two. One end of the torsion spring is inserted into the limiting hole, and the other end is engaged in the arc-shaped limiting groove. This utility model achieves automatic hinge opening through the release of the elastic potential energy of the torsion spring, eliminating the need for manual flipping. The frictional damping effect of the damping spring prevents collision noises or structural damage caused by excessive speed when the hinge springs open, thus extending its service life.

Description

Technical Field

[0001] This utility model relates to the field of damping hinge technology, and specifically to a spring-loaded damping hinge. Background Technology

[0002] Hinges are commonly used hardware components in existing technology, with a wide range of applications in automobiles and other fields. The quality of a hinge determines the connection performance between two objects connected by the hinge in automobiles and other equipment, enabling the rotational connection between the two objects during use.

[0003] Taking car seat tray tables as an example, early tray table hinges mostly used purely mechanical rigid connections, relying on manual flipping and opening, which was not only laborious to operate, but also lacked a buffer structure. During the opening and closing process, it was easy to cause collision noises due to excessive speed, and even cause wear on the edges of the tray table or the surface of the seat, affecting its service life. Utility Model Content

[0004] To address the problems of the prior art, this utility model provides a spring-loaded damping hinge.

[0005] The objective of this utility model can be achieved through the following technical solution: A spring-loaded damping hinge includes a shell, a damping spring, and a spindle. A spring-loaded module is provided between the shell and a limiting plate. The spring-loaded module includes a torsion spring and a limiting plate. The shell has a through-hole forming an installation cavity with an installation hole at its lower end. The lower end of the installation cavity has a limiting hole. The damping spring is assembled in the installation cavity. The front section of the spindle is inserted into the damping spring, and the middle section has a limiting surface one. The limiting plate has an arc-shaped limiting groove on its outer side and a limiting surface two corresponding to the limiting surface one on its inner side. The limiting plate is sleeved on the middle of the spindle and forms a limiting fit with the spindle through the limiting surface two. One end of the torsion spring is inserted into the limiting hole, and the other end is locked in the arc-shaped limiting groove.

[0006] In a further improvement, a limiting groove is provided at the lower part of the mounting cavity, and a limiting block is provided at the lower end of the damping spring, with the limiting block corresponding to the limiting groove.

[0007] In a further improvement, the mandrel includes a friction section, a limiting section, and an assembly section. The friction section can form a friction pair with the damping spring. The limiting surface is disposed on the limiting section. The assembly section is used for assembly with an external transmission mechanism.

[0008] In a further improvement, two sets of limiting surfaces one and two are provided, and the two sets of limiting surfaces one and two are symmetrically arranged.

[0009] As a further improvement, the front end of the mandrel is chamfered.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. This utility model achieves automatic opening of the hinge by releasing the elastic potential energy of the torsion spring, without the need for manual flipping, and is especially suitable for one-handed operation scenarios when holding objects with both hands.

[0012] 2. The friction damping effect of the damping spring of this utility model avoids collision noise or structural damage caused by excessive speed when the hinge opens, thus extending its service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the present invention;

[0015] Figure 3 This is a schematic diagram of the springback module and mandrel of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the outer shell and damping spring of this utility model.

[0017] In the diagram, 1. Outer shell; 11. Mounting cavity; 12. Mounting hole; 13. Limiting hole; 111. Limiting groove; 2. Damping spring; 21. Limiting block; 3. Mandrel; 31. Limiting surface one; 4. Springback module; 41. Torsion spring; 42. Limiting piece; 421. Arc-shaped limiting groove; 422. Limiting surface two; 51. Friction section; 52. Limiting section; 53. Assembly section; 54. Chamfer. Detailed Implementation

[0018] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The following describes the embodiments and appendices. Figures 1-4 The technical solution of this utility model will be further described below.

[0021] Example 1

[0022] A spring-loaded damping hinge includes a housing 1, a damping spring 2, and a spindle 3. A spring-loaded module 4 is provided between the housing 1 and a limiting plate 4. The spring-loaded module 4 includes a torsion spring 41 and a limiting plate 42. The housing 1 has a through-hole forming a mounting cavity 11 with a mounting hole 12 at its lower end. The mounting cavity 11 has a limiting hole 13 at its lower end. The damping spring 2 is assembled in the mounting cavity 11. The front section of the spindle 3 is inserted into the damping spring 2, and the middle section has a limiting surface 31. The limiting plate 42 has an arc-shaped limiting groove 421 on its outer side and a limiting surface 422 on its inner side that corresponds to and cooperates with the limiting surface 31. The limiting plate 42 is sleeved on the middle of the spindle 3 and forms a limiting cooperation with the spindle 3 through the limiting surface 422. One end of the torsion spring 41 is inserted into the limiting hole 13, and the other end is locked in the arc-shaped limiting groove 421.

[0023] like Figures 1-4 As shown, taking a car seat tray as an example, firstly, the outer shell 1 is fixed to the side of the seat back with screws. The rear end of the spindle 3 is fixedly connected to the rotating side of the tray, ensuring that the spindle 3 can drive the tray to unfold or retract synchronously when it rotates. Secondly, the tray is manually flipped upwards to fit against the seat back. At this time, the spindle 3 rotates synchronously with the tray. Through the cooperation of the limiting surface 31 and the limiting surface 422 of the limiting plate 42, the limiting plate 42 is driven to rotate, causing the torsion spring 41 to be torsionally stored (elastic potential energy stored). The damping spring 2 provides reverse friction when the spindle 3 rotates. To prevent the closing process from being too fast, when the small table is needed, the lock on the small table is released (e.g., by pressing the unlock button). The torsion spring 41 in the spring-loaded module 4 releases the stored elastic potential energy, causing the limiting plate 42 to rotate in the opposite direction. The limiting plate 42 pushes the limiting surface 31 of the spindle 3 through the limiting surface 2 422, causing the spindle 3 to rotate automatically, thus realizing the automatic opening of the small table. At the same time, the friction between the damping spring 2 and the spindle 3 slows down the rotation speed, ensuring that the small table unfolds slowly and smoothly to a horizontal use state. The whole process does not require manual flipping, improving the convenience of operation.

[0024] This invention enables the small table to open automatically by releasing the elastic potential energy of the torsion spring 42, eliminating the need for manual flipping. This is especially suitable for one-handed operation scenarios when holding objects with both hands. The friction damping effect of the damping spring 2 prevents the small table from making collision noises or structural damage due to excessive speed when it pops open, thus extending its service life.

[0025] As a further preferred embodiment, a limiting groove 111 is provided at the lower part of the mounting cavity 11, and a limiting block 21 is provided at the lower end of the damping spring 2, with the limiting block 21 corresponding to the limiting groove 111.

[0026] Specifically, when the damping spring 2 is installed into the mounting cavity 11, the lower limit block 21 should be aligned with the limit groove 111 at the lower part of the mounting cavity 11, and gently pressed so that the limit block 21 is fully embedded in the groove. At this time, the lower end of the damping spring 2 is axially locked and can only undergo radial deformation with the rotation of the spindle 3, and will not move up and down in the mounting cavity 11.

[0027] As a further preferred embodiment, the spindle 3 includes a friction section 51, a limiting section 52, and an assembly section 53. The friction section 51 can form a friction pair with the damping spring 2. The limiting surface 31 is disposed on the limiting section 52. The assembly section 53 is used for assembly with an external transmission mechanism.

[0028] Specifically, during assembly, the friction section 51 of the spindle 3 passes through the inner hole of the damping spring 2, forming a frictional fit with the inner wall of the damping spring 2. When the spindle 3 rotates, the relative motion between the friction section 51 and the damping spring 2 generates stable damping, preventing the small table from moving too fast. The limiting section 52 passes through the inner hole of the limiting plate 42, so that the first limiting surface 31 and the second limiting surface 422 are completely in contact, ensuring that the elastic force of the torsion spring 41 is accurately transmitted to the spindle 3 through the limiting plate 42. The assembly section 53 is fixed to the rotating end of the small table through a thread (or key connection), realizing a rigid connection between the spindle 3 and the external mechanism.

[0029] As a further preferred embodiment, two sets of limiting surface 31 and limiting surface 422 are provided respectively, and the two sets of limiting surface 31 and limiting surface 422 are symmetrically arranged.

[0030] Specifically, when the torsion spring 41 releases its elastic potential energy, its driving force is transmitted to the limiting plate 42 through the arc-shaped limiting groove 421. The two sets of limiting surfaces 422 of the limiting plate 42 act simultaneously on the two sets of limiting surfaces 31 of the limiting section 52 of the spindle 3. Compared with a single set of limiting surfaces, the double-set symmetrical design distributes the torque to two contact surfaces. The cooperation of the two limiting surfaces can prevent the limiting plate 42 from tilting during rotation, ensuring that the force on both sides of the torsion spring 41 is uniform, avoiding elastic fatigue caused by excessive stretching on one side, and extending the service life of the torsion spring.

[0031] As a further preferred embodiment, the front end of the mandrel 3 is provided with a chamfer 54.

[0032] Specifically, during assembly, when the friction section 51 of the mandrel 3 is inserted into the damping spring 2, the chamfer 54 at the front end acts as a guide. Operators do not need to precisely align the mandrel and the damping spring's center axis; the chamfer guides the mandrel smoothly into the damping spring's inner hole, reducing alignment time during assembly. During long-term use of the small table, the mandrel needs to rotate frequently to open and close the table. The chamfer 54 prevents the sharp edge of the mandrel from scratching the inner ring of the damping spring 2. When the mandrel rotates, the smooth chamfered surface contacts the inner ring of the damping spring, reducing localized stress concentration and decreasing wear on the inner ring caused by long-term friction, thus ensuring the stability of the friction pair.

[0033] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A recoil damper hinge comprising a housing, a damper spring and a mandrel, characterized in that, A spring-loaded module is provided between the outer shell and the limiting plate. The spring-loaded module includes a torsion spring and a limiting plate. The outer shell has a through-hole forming an installation cavity with an installation hole at its lower end. The lower end of the installation cavity has a limiting hole. The damping spring is assembled in the installation cavity. The front section of the spindle is inserted into the damping spring and has a limiting surface one in its middle section. The limiting plate has an arc-shaped limiting groove on its outer side and a limiting surface two on its inner side that corresponds to and cooperates with the limiting surface one. The limiting plate is sleeved on the middle of the spindle and forms a limiting cooperation with the spindle through the limiting surface two. One end of the torsion spring is inserted into the limiting hole, and the other end is stuck in the arc-shaped limiting groove.

2. A recoil damper hinge according to claim 1, wherein The lower part of the mounting cavity is provided with a limiting groove, and the lower end of the damping spring is provided with a limiting block, with the limiting block corresponding to the limiting groove.

3. The spring-loaded damping hinge according to claim 1, characterized in that, The spindle includes a friction section, a limiting section, and an assembly section. The friction section can form a friction pair with the damping spring. The limiting surface is disposed on the limiting section. The assembly section is used for assembly with an external transmission mechanism.

4. The spring-loaded damping hinge according to claim 1, characterized in that, The first limiting surface and the second limiting surface are provided in two sets, and the two sets of the first limiting surface and the second limiting surface are symmetrically arranged.

5. A spring-loaded damping hinge according to claim 1, characterized in that, The front end of the mandrel is chamfered.

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