Damping rotating joint for seat and seat

Abstract

The damping rotating joint comprises a supporting seat and a rotating seat rotationally connected to the supporting seat through a rotating shaft, a disc spring is arranged at the rotating connecting position of the rotating seat and the supporting seat, pre-tightening force is applied to the rotating seat, and compared with a rubber mat material, the service life of the disc spring is longer, the structural strength is higher, and the damping rotating joint can be used for damping the seat. The rotating seat has a better damping feeling when rotating, and when the rotating seat is arranged on the seat, the use experience feeling of the seat can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of seating, and in particular to a damped rotating joint for seating and a seating. Background Technology

[0002] Most office chairs have a headrest or lumbar support that can rotate and be adjusted to different support positions. Taking the headrest as an example, a support base is set at the upper part of the chair back, and a connecting base is set at the rear of the headrest. The connecting base is usually rotatably connected to the support base. In order to ensure the stability of the headrest, a damping element is set between the connecting base and the support base. The damping element can apply pre-tight resistance between the connecting base and the support base, so that the headrest can rotate with resistance. When the headrest is adjusted to the correct position, the presence of pre-tight resistance can also keep the headrest in the corresponding support position, ensuring its stability.

[0003] Existing damping components are usually made of silicone pads. These pads are inexpensive and have good elasticity. They can undergo elastic deformation under stress to apply the pre-tightening resistance between the connecting seat and the support seat. However, since the pads are made of silicone, the pre-tightening resistance they generate is limited. After repeated rotations of the headrest, the pads are also prone to aging, and their service life cannot meet the requirements, affecting the user experience of the seat. Summary of the Invention

[0004] This utility model provides a damping rotating joint and seat for a chair. By setting a disc spring at the rotating connection between the rotating seat and the support seat, a preload is applied to the rotating seat. Compared with rubber pad material, the disc spring has a longer service life and higher structural strength, which can make the rotating seat have better damping feel when rotating, thus improving the user experience of the chair.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A damping rotary joint for a seat includes a support base and a rotating base rotatably connected to the support base via a pivot. A disc spring is provided at the rotatable connection between the rotating base and the support base. The disc spring elastically deforms under the compression of an external force in the axial direction of the pivot and applies rotational frictional resistance between the rotating base and the support base.

[0007] Preferably, the number of disc springs is one.

[0008] Preferably, there are multiple disc springs; multiple disc springs can provide sufficient preload to generate sufficient damping when the rotating seat rotates.

[0009] Preferably, in the plurality of disc springs, every two adjacent disc springs are arranged in an alternating pattern of positive and negative, or every two adjacent disc springs are arranged in the same direction.

[0010] Preferably, the multiple disc springs can be divided into multiple disc spring groups, each disc spring group including multiple disc springs arranged in the same direction, and every two adjacent disc spring groups are arranged in an alternating forward and reverse manner.

[0011] Preferably, a screw is provided at the rotatable connection between the rotating seat and the support seat. The screw includes a rod with a threaded section and a cap at one end of the rod. The rod serves as the pivot between the rotating seat and the support seat, and the disc spring is sleeved on the rod. Both the rotating seat and the support seat are provided with pivot holes, and the pivot holes have threaded sections. The threaded section of the rod is threaded onto the threaded sections, so that the cap directly or indirectly compresses the disc spring to elastically deform. The screw is both a rotatable support shaft between the rotating seat and the support seat and a driving component that causes the disc spring to elastically deform. This ingenious design achieves multiple benefits.

[0012] Preferably, the disc spring is disposed between the cap body and the rotating seat; or, the disc spring is disposed between the cap body and the support seat; or, the disc spring is disposed between the support seat and the rotating seat.

[0013] Preferably, a nut is pre-embedded in the shaft hole, and the screwed section is the internal thread section of the nut; or, the screw includes an internally threaded screw and an externally threaded screw that are mated to each other, the shank of the internally threaded screw is a sleeve with an internally threaded section, and the shank of the externally threaded screw is a screw rod with an externally threaded section, wherein the internally threaded section and the externally threaded section are the threaded sections of each other.

[0014] Preferably, the rotating seat or support seat is provided with a groove extending along the axial direction of the rotating shaft, and the disc spring is disposed in the groove to avoid the disc spring being exposed.

[0015] A seat includes a backrest and a damped rotary joint disposed on the backrest.

[0016] Preferably, it also includes a lumbar support, a support base for direct or indirect connection to the chair back, and a swivel base for direct or indirect connection to the lumbar support; the support position of the lumbar support can be adjusted by rotation.

[0017] Preferably, the chair also includes a headrest, a support base for direct or indirect connection to the chair back, and a swivel base for direct or indirect connection to the headrest, so as to adjust the support position of the headrest by rotation.

[0018] The beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0019] This invention replaces the rubber pad damping component with a disc spring, applying a preload force to the rotating seat. Compared to the rubber pad, the disc spring, made of metal, has higher structural strength, a longer service life, and generates greater elasticity under pressure, resulting in better damping during the rotation of the seat. It will not be damaged even after repeated rotations. When installed between the backrest and lumbar support or headrest of the chair, it allows the lumbar support or headrest to rotate with resistance to the predetermined support position, effectively improving the user experience of the chair. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the headrest adjustment mechanism;

[0021] Figure 2 This is a schematic diagram showing the headrest adjustment mechanism and the interior of the cover after the handle is removed.

[0022] Figure 3 An exploded view of the headrest adjustment mechanism;

[0023] Figure 4 This is a cross-sectional view showing the positions of the rotating seat and the support seat.

[0024] Figure 5 This is a cross-sectional view of the connection between the headrest and the shielding component;

[0025] Figure 6 This is a schematic diagram of the connection structure between the rotating component and the sliding seat.

[0026] Figure 7 This is a schematic diagram of the connection structure between the rotating component and the sliding seat, viewed from a low angle.

[0027] Figure 8 This is a schematic diagram of the headrest adjustment mechanism from a downward viewing angle;

[0028] Figure 9 A cross-sectional view of the active connection structure including the obscured components;

[0029] Figure 10 A cross-sectional view of multiple disc springs arranged in the same direction;

[0030] Figure 11 A cross-sectional view of multiple disc spring assemblies arranged in an alternating forward and reverse pattern;

[0031] Figure 12 A schematic diagram showing multiple disc springs arranged between the support base and the rotating base;

[0032] Figure 13 This is a cross-sectional view of the connection between the support base and the rotating base in Embodiment 2;

[0033] The reference numerals for each figure are as follows: 1-support base, 1a-support arm, 1b-base, 2-rotating seat, 3-sliding seat, 4-screw, 4a-support shaft, 5-shielding part, 6-handle, 7-headrest, 31-guide groove, 32-moving gear, 321-guide part, 21-guide rail, 22-ratchet groove, 23-circulation channel, 41-disc spring, 42-nut, 51-accommodating space, 52-support, 53-connecting hole, 61-connecting part, 71-connecting seat. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0036] This utility model has multiple embodiments, and the specific implementation methods are as follows:

[0037] Example 1: As Figure 1-12 As shown, this embodiment provides a headrest adjustment mechanism, which includes a damping rotary joint for a seat. The damping rotary joint includes a support seat 1 and a rotating seat 2 rotatably connected to the support seat 1 via a rotating shaft. A disc spring 41 is provided at the rotatable connection between the rotating seat 2 and the support seat 1. The disc spring 41 is made of an elastic metal material with a conical cross-sectional shape. Under the compression of an external force in the axial direction of the rotating shaft, the disc spring 41 elastically deforms and applies rotational frictional resistance between the rotating seat 2 and the support seat 1. The number of disc springs 41 can be single or multiple. A single disc spring 41 occupies less space and generates less elastic preload. In this embodiment, it is preferred that the number of disc springs 41 is multiple, as multiple disc springs 41 can provide sufficient preload to generate sufficient damping when the rotating seat 2 rotates.

[0038] Furthermore, such as Figure 4-5 , Figure 10-11 As shown, the multiple disc springs 41 have various arrangement methods. During installation, the arrangement method of the multiple disc springs 41 can be selected according to the actual situation. For example, if the reserved disc spring deformation space is sufficient and the required preload is small, the multiple disc springs 41 can be arranged in an alternating forward and reverse manner, thereby forming an elastic deformation space between each pair of adjacent disc springs 41. At the same time, the preload generated by the multiple disc springs 41 is equivalent to that of a single disc spring 41.

[0039] Furthermore, when the reserved space for disc spring deformation is insufficient and the required preload is large, two adjacent disc springs 41 can be arranged in the same direction. In this way, two adjacent disc springs 41 are tightly stacked together. When subjected to pressure, the deformation of multiple disc springs 41 is equivalent to the deformation of a single disc spring, and the generated preload is equivalent to the product of the preload generated by a single disc spring 41 and the number of disc springs 41.

[0040] Furthermore, when the reserved deformation space of the disc springs is sufficient and the required preload is large, they can be arranged as follows: the multiple disc springs 41 are divided into multiple disc spring groups, each disc spring group includes multiple disc springs arranged in the same direction. In this embodiment, each disc spring group has two disc springs 41, and every two adjacent disc spring groups are arranged in an alternating forward and reverse manner; an elastic deformation space is formed between every two disc spring groups, and the preload generated by the multiple disc springs 41 is equal to the product of the preload generated by a single disc spring 41 and the number of disc springs 41 in each disc spring group.

[0041] Furthermore, such as Figure 4 As shown, to force the disc spring 41 to deform and generate an elastic preload, a screw 4 is provided at the rotational connection between the rotating seat 2 and the support seat 1. The screw 4 serves as both the rotational support shaft between the rotating seat 2 and the support seat 1 and the driving component that causes the disc spring 41 to deform elastically. This ingenious design achieves multiple benefits. Specifically, the screw 4 includes a rod with a threaded section and a cap at one end of the rod. The rod is the rotating shaft between the rotating seat 2 and the support seat 1, and the disc spring 41 is fitted onto the rod. Both the rotating seat 2 and the support seat 1 have rotating shaft holes with threaded sections inside. The threaded section of the rod is threaded onto the threaded section, allowing the cap to directly or indirectly compress the disc spring 41 to deform elastically. Correspondingly, the disc spring 41 also has multiple installation positions. For example, the disc spring 41 can be positioned between the cap and the rotating seat 2, or between the cap and the support seat 1, so that the cap directly compresses the disc spring 41 to deform elastically, generating an elastic preload between the rotating seat 2 and the support seat 1. Alternatively, as... Figure 12 As shown, the disc spring 41 can also be set between the support seat 1 and the rotating seat 2. When the screw 4 rotates, the cap will force the rotating seat 2 to gradually approach the support seat 1 and squeeze the disc spring 41, and also cause the disc spring 41 to produce elastic deformation, so as to form an elastic preload between the rotating seat 2 and the support seat 1.

[0042] Furthermore, there are many ways to set the threaded section. For example, in this embodiment, a nut 42 is pre-embedded in the shaft hole, and the threaded section is the internal threaded section of the nut 42; or, the screw 4 includes an internal threaded screw and an external threaded screw that are mated to each other. The internal threaded screw and the external threaded screw are existing through screws. The shank of the internal threaded screw is a sleeve with an internal threaded section, and the shank of the external threaded screw is a screw with an external threaded section. The internal threaded section and the external threaded section are the threaded sections of each other. When the internal threaded screw and the external threaded screw are rotated, the internal threaded section and the external threaded section are threadedly engaged. The cap of the internal threaded screw or the cap on the external threaded screw will compress the disc spring 41 to produce elastic deformation.

[0043] Furthermore, to ensure the simple appearance of the rotating joint, the rotating seat 2 or the support seat 1 is provided with a groove extending along the axial direction of the rotating shaft, and the disc spring 41 is disposed in the groove to avoid the disc spring 41 being exposed.

[0044] Furthermore, a seat is provided, including a backrest and the aforementioned damping rotating joint. The damping rotating joint is disposed on the backrest to adjust the support position of the headrest 7 or lumbar support (not shown) in the seat. For example, the support seat 1 can be directly or indirectly connected to the lower end of the backrest, and the rotating seat 2 can be directly or indirectly connected to the lumbar support. The user can adjust the support position by rotating the lumbar support with resistance. Alternatively, for example, the support seat 1 can be directly or indirectly connected to the upper end of the backrest, and the rotating seat 2 can be directly or indirectly connected to the headrest 7. The user can adjust the support position by rotating the headrest 7 with resistance, thereby meeting the user's needs.

[0045] Furthermore, such as Figure 4-9 As shown, to ensure that the connecting parts are not exposed when the headrest 7 is adjusted, and to prevent pinching while avoiding affecting the appearance, this embodiment also provides a hidden headrest adjustment mechanism, including the support base 1 and the headrest 7. A movable part is provided between the support base 1 and the headrest 7; the movable part is linked to the headrest 7; the movable part is movably connected to the support base 1 and forms a movable connection structure; a cover 5 is installed on the movable part; the cover 5 is a molded plastic part, and the end face of the cover 5 facing the movable part is recessed to form an accommodating space 51 for concealing the movable connection structure; under the action of external force, when the movable part moves in conjunction with the headrest 7, the movable connection structure is always kept within the accommodating space 51 and is not exposed.

[0046] Furthermore, to facilitate adjustment of the front-to-back and longitudinal support positions of the headrest 7, the movable components in this embodiment include the rotating seat 2 and the sliding seat 3. The rotating seat 2 is rotatably connected to the support seat 1 in the longitudinal direction, and the sliding seat 3 is slidably connected to the rotating seat 2 in the front-to-back direction. The blocking member 5 is installed on the sliding seat 3. The rotating seat 2, the sliding seat 3, and the support seat 1 constitute the movable connection structure. At the same time, due to the presence of the blocking member 5, whether the headrest slides back and forth or rotates up and down, the blocking member 5 will move with the sliding seat 3 or the rotating seat 2 and surround the movable connection structure, so that the entire headrest adjustment mechanism maintains a simple appearance while effectively avoiding safety problems such as pinching hands.

[0047] Furthermore, the installation structure of the sliding seat 3 and the support seat 1 is as follows: The sliding seat 3 has an "I" shaped structure. The sliding seat 3 includes two wide sections and a narrow section integrally formed between the two wide sections. The narrow section and the two wide sections constitute two clearance areas. The support seat 1 includes two supports for rotatably connecting with the rotating seat 2. The two supports are respectively located in the corresponding clearance areas. When the sliding seat 3 slides back and forth, the clearance areas can effectively avoid the two supports. When the sliding seat 3 slides to the front end or the rear end, the corresponding wide section will abut against the support to limit the sliding seat 3 from continuing to slide after sliding to the front end or the rear end.

[0048] Furthermore, a disc spring 41 is provided between the rotating seat 2 and the support seat 1 to provide elastic preload, allowing the rotating seat 2 to rotate with damping while also keeping it in the corresponding position after rotation. Simultaneously, a cyclic ratchet structure is provided between the rotating seat 2 and the sliding seat 3, allowing the sliding seat 3 to remain in the corresponding position after sliding forward and backward. Specifically, the sliding seat 3 has a guide groove 31, and the rotating seat 2 has a guide rail 21 that slides within the guide groove 31. A movable gear 32 is rotatably connected to the sliding seat 3, with a ratchet portion. The rotating seat 2 has multiple ratchet grooves 22 spaced forward and backward. When the sliding seat 3 slides forward, the ratchet portion switches between the multiple ratchet grooves 22. When the sliding seat 3 slides to the foremost position, it resets backward using a cyclic reset structure. The cyclic reset structure includes a circulation channel 23 on the rotating seat 2. 3 includes a sliding channel and a reset channel that extend forward and backward and are spaced apart from each other. The front end of the sliding channel and the front end of the reset channel are connected to each other to form a first conversion channel. The rear end of the sliding channel and the rear end of the reset channel are connected to each other to form a second conversion channel. The movable gear 32 is provided with a guide part 321. When the sliding seat 3 slides forward, the guide part slides in the sliding channel and gradually approaches the first conversion channel. When the sliding seat 3 slides to the front end, the guide part 321 passes through the first conversion channel and enters the reset channel. At this time, the ratchet part disengages from the ratchet groove 22, so that the sliding seat 3 can directly reset backward. At this time, the guide part slides in the reset channel and gradually approaches the second conversion channel. When the sliding seat 3 slides to the rear end, the guide part 321 passes through the second conversion channel and enters the sliding channel. This cycle repeats, so that the sliding seat 3 slides forward and backward and adjusts the front and rear support position of the headrest 7.

[0049] Furthermore, in this embodiment, the headrest is connected to the shielding member 5 so that the movable part is linked to the headrest 7. At the same time, in order to further adjust the support angle of the headrest 7, the headrest 7 and the shielding member 5 are rotatably connected. Specifically, the rotating seat 2 is linked to a shielding member 5. The rear end of the headrest 7 is provided with a connecting seat 71, and the front end of the shielding member 5 is provided with two supports 52. The connecting seat 71 is rotatably connected to the two supports 52. The rotatable connection between the connecting seat 71 and the two supports 52 is also provided with a disc spring 41 and a screw 4 to provide preload force for the headrest 7, so that the headrest 7 has a damping feel when it is rotated and adjusted. Therefore, the connecting seat 71 at the rear end of the headrest 7, the two supports 52 at the front end of the shielding member 5, and the disc spring 41 provided between the two supports 52 and the connecting seat 71 also constitute the aforementioned damping rotation joint.

[0050] Furthermore, the shielding part 5 and the movable part are connected by screws. Specifically, the shielding part 5 and the sliding seat 3 are locked by threaded fasteners, which are screws or bolts. In order to hide the connection marks and avoid the threaded fasteners being exposed, the receiving space 51 of the shielding part 5 is provided with a locking part. The locking part is provided with a screw hole, and the movable part is provided with a corresponding through hole. The screw passes through the through hole and is screwed into the screw hole to fix the movable part and the shielding part 5.

[0051] Furthermore, a handle 6 is connected to the cover 5 so that the user can grip and pull the headrest 7 to adjust the support position. The connection structure between the handle 6 and the cover 5 is as follows: In order to keep the handle 6 in the predetermined position, the handle 6 has two rotating connection points. One rotating connection point is hinged to the rotating connection position between the cover 5 and the headrest 7, and the other rotating connection point is provided with a connecting part 61. The cover 5 is provided with a corresponding connecting hole 53, and the connecting part 61 is rotatably connected in the connecting hole 61.

[0052] Furthermore, a seat is provided, which, in addition to the aforementioned backrest, also includes the aforementioned hidden headrest adjustment mechanism. A base 1b is provided on the backrest, one end of which is integrally formed with the support seat 1, and the other end of which is integrally formed with or detachably connected to the backrest. The detachable connection is typically a screw connection or a plug-in connection. For example, in this embodiment, the base 1b is a column. To facilitate disassembly and assembly, a mounting seat (not shown) corresponding to the position of the base 1b is provided at the upper end of the backrest. The mounting seat is an open and hollow sleeve structure. The other end of the base 1b is plugged into the mounting seat, allowing the entire hidden headrest adjustment mechanism to be installed at the upper end of the backrest. When the hidden headrest adjustment mechanism is installed on the backrest, the entire upper structure of the seat is aesthetically pleasing, preventing hand pinching when adjusting the support position of the headrest 7.

[0053] Example 2: Figure 13 As shown, in this embodiment, the disc spring 41 is forced to deform by the elastic force of the support base 1 itself. That is, the support base 1 includes two elastic support arms 1a, and the rotating base 2 is rotatably connected between the two support arms 1a. The disc spring 41 is provided between each support arm 1a and the rotating base 2. After the two support arms 1a elastically open, they retract inward and act on the corresponding disc spring 41. Without the screw 4, the disc spring 41 can also be elastically deformed to provide elastic preload between the rotating base 2 and the support base 1.

[0054] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A damped rotary joint for a seat, characterized in that, It includes a support base (1) and a rotating base (2) rotatably connected to the support base (1) via a rotating shaft; a disc spring (41) is provided at the rotatable connection between the rotating base (2) and the support base (1). The disc spring (41) is elastically deformed under the external force compression in the axial direction of the rotating shaft and applies rotational friction resistance between the rotating base (2) and the support base (1).

2. The damped rotary joint for a seat according to claim 1, characterized in that: The number of disc springs (41) is one.

3. A damped rotary joint for a seat according to claim 1, characterized in that: The number of disc springs (41) is multiple.

4. A damped rotary joint for a seat according to claim 3, characterized in that: In the multiple disc springs (41), every two adjacent disc springs (41) are arranged in an alternating pattern, or every two adjacent disc springs (41) are arranged in the same direction.

5. A damped rotary joint for a seat according to claim 3, characterized in that: Multiple disc springs (41) can be divided into multiple disc spring groups, each disc spring group including multiple disc springs arranged in the same direction, and every two adjacent disc spring groups are arranged in an alternating forward and reverse manner.

6. A damped rotary joint for a seat according to claim 1, characterized in that: A screw (4) is provided at the rotating connection between the rotating seat (2) and the support seat (1). The screw (4) includes a rod with a threaded section and a cap at one end of the rod. The rod is the pivot between the rotating seat (2) and the support seat (1). The disc spring (41) is sleeved on the rod. The rotating seat (2) and the support seat (1) are provided with pivot holes. The pivot holes have threaded sections. The threaded section of the rod is threaded onto the threaded section so that the cap directly or indirectly compresses the disc spring (41) to elastically deform.

7. A damped rotary joint for a seat according to claim 6, characterized in that: The disc spring (41) is located between the cap body and the rotating seat (2); or, the disc spring (41) is located between the cap body and the support seat (1); or, the disc spring (41) is located between the support seat (1) and the rotating seat (2).

8. A damped rotary joint for a seat according to claim 6, characterized in that: A nut (42) is pre-embedded in the shaft hole, and the screw section is the internal thread section of the nut (42); or, the screw (4) includes an internal thread screw and an external thread screw that are mated to each other. The shank of the internal thread screw is a sleeve with an internal thread section, and the shank of the external thread screw is a screw with an external thread section. The internal thread section and the external thread section are the thread sections of each other.

9. A damped rotary joint for a seat according to claim 1, characterized in that: The rotating seat (2) or the support seat (1) is provided with a groove extending along the axis of the rotating shaft, and the disc spring (41) is disposed in the groove.

10. A type of seat, characterized in that: It includes a chair back and the damping rotary joint as described in claim 1, wherein the damping rotary joint is disposed on the chair back.

11. A seat according to claim 10, characterized in that: It also includes a lumbar support, a support seat (1) for direct or indirect connection with the chair back, and a swivel seat (2) for direct or indirect connection with the lumbar support.

12. A seat according to claim 10, characterized in that: It also includes a headrest (7), a support seat (1) for direct or indirect connection with the chair back, and a swivel seat (2) for direct or indirect connection with the headrest (7).

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