Hidden headrest adjusting mechanism and seat

Abstract

The utility model discloses a hidden type headrest adjusting mechanism and a seat, the hidden type headrest adjusting mechanism comprises a supporting seat and a headrest, and a movable part is arranged between the supporting seat and the headrest; the movable part is in linkage connection with the headrest; the movable part is movably connected with the supporting seat to form a movable connecting structure; a shielding part is mounted on the movable part; the end face, facing the movable component, of the shielding piece is concave inwards and forms a containing space used for hiding the movable connecting structure. The shielding piece is connected to the movable component, the movable connecting mechanism formed by the movable component and the supporting part is arranged in the containing space of the shielding piece, the problem that hands are clamped due to the fact that the movable connecting mechanism is exposed is avoided, the headrest adjusting mechanism is arranged on a seat, the appearance of the seat can be effectively simplified, and the safety and the use experience feeling of the seat are improved.

Description

Technical Field

[0001] This utility model relates to the field of seating, and in particular to a concealed headrest adjustment mechanism and a seat. Background Technology

[0002] The upper part of the seat back is equipped with an adjustable headrest. To facilitate adjustment of the headrest's support position, some headrests are usually movably connected to the upper part of the seat back to adjust their support position in the front-back or vertical direction to meet usage needs.

[0003] For example, the headrest patent with publication number CN217644858 includes a headrest cushion and a headrest reinforcement base. The headrest reinforcement base has two connecting parts, and the headrest cushion is located between the two connecting parts. One end of the first connecting member is connected to the headrest reinforcement base, and the other end is rotatably connected to the second connecting member. The third connecting member is slidably sleeved on the second connecting member. Lifting or pressing down the headrest reinforcement base can adjust the height of the entire headrest in the upward or downward direction. However, both the third connecting member and the second connecting member are exposed. Installing this headrest on the chair back not only affects the appearance of the chair but also easily causes safety problems such as pinching hands.

[0004] For example, in the adjustable headrest office chair with announcement number CN221887970, a fixed plate is fixedly installed on the back of the office chair, and a lifting plate is slidably installed inside the fixed plate. A height adjustment device is installed on the back of the office chair below the fixed plate and is poweredly connected to the lifting plate. A front-to-back adjustment device is installed on the upper part of the lifting plate, and the end of the front-to-back adjustment device is connected to the headrest through an angle adjustment device. The front-to-back adjustment device includes a second lead screw, which is threadedly connected to the lifting plate. The end of the second lead screw has a second handwheel. By rotating the second handwheel, the headrest can be adjusted front-to-back. However, in this patent, the lifting plate and the second lead screw are both exposed, which is not simple in appearance. Moreover, it is easier to cause safety problems such as pinching fingers when adjusting the height or front-to-back of the headrest. Summary of the Invention

[0005] This utility model provides a concealed headrest adjustment mechanism and seat. By connecting a cover to the movable part, the movable connecting mechanism formed by the movable part and the support part is built into the receiving space of the cover. When the headrest is adjusted, the movable connecting structure is always surrounded by the cover, which simplifies the appearance of the seat and improves the safety of the seat.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A concealed headrest adjustment mechanism includes a support base and a headrest, with a movable component between the support base and the headrest; the movable component is linked to the headrest; the movable component is movably connected to the support base and forms a movable connection structure; a cover is installed on the movable component; the end face of the cover facing the movable component is recessed and forms an accommodating space for concealing the movable connection structure; under the action of external force, when the movable component moves in conjunction with the headrest, the movable connection structure is always kept within the accommodating space and is not exposed.

[0008] Preferably, the movable part is a sliding part that is slidably connected to the support base.

[0009] Preferably, the movable part is a rotating part that is rotatably connected to the support base.

[0010] Preferably, the movable component includes a rotating component and a sliding component. The rotating component is rotatably connected to the support base in the longitudinal direction, and the sliding component is slidably connected to the rotating component in the front-back direction. The blocking component is installed on the sliding component. The rotating component, the sliding component, and the support base constitute the movable connection structure.

[0011] Preferably, the slider has an "I" shaped structure, comprising 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 base includes two supports for rotatably connecting with the rotating component, with the two supports located in their respective clearance areas to avoid interference between the slider and the supports when sliding.

[0012] Preferably, the headrest is connected to the cover so that the movable parts are linked to the headrest.

[0013] Preferably, the shield and the moving parts are locked together by threaded fasteners.

[0014] Preferably, the receiving space of the shielding part is provided with a locking part, the locking part is provided with a threaded hole, the movable part is provided with a corresponding through hole, the threaded fastener passes through the through hole and is screwed into the threaded hole to fix the movable part and the shielding part in place, so as to avoid the threaded fastener being exposed.

[0015] Preferably, the cover is equipped with a handle to facilitate the movement of the headrest.

[0016] A seat includes a backrest and a concealed headrest adjustment mechanism. A base is provided on the backrest, one end of which is integrally formed with a support seat, and the other end of which is integrally formed with or detachably connected to the backrest.

[0017] Preferably, the other end of the base is inserted into the backrest; the base is a column, and the upper end of the backrest is provided with a mounting seat corresponding to the position of the base. The mounting seat is a sleeve structure with an open upper end, and the other end of the base is inserted into the sleeve structure.

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

[0019] This invention connects a cover to a movable component and embeds the movable connection mechanism, which consists of the movable component and the support, within the receiving space of the cover. When the headrest is adjusted, the cover always moves with the movable component, ensuring that the movable connection structure is always surrounded by the cover. This avoids problems such as pinching fingers caused by the exposed movable connection structure. By placing this headrest adjustment mechanism on the seat, the appearance of the seat can be effectively simplified, and the safety and user experience of the seat can be improved. 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 sectional view of the active connection structure;

[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 component.

[0026] Figure 7 This is a schematic diagram of the connection structure between the rotating component and the sliding component, 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 component;

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

[0033] Figure 14a This is a cross-sectional view showing the position of the rotating component in Embodiment 3;

[0034] Figure 14b This is a cross-sectional view of the sliding component position in Embodiment 3;

[0035] The reference numerals for each figure are as follows: 1-support base, 1a-support arm, 1b-base, 2-rotating component, 2a-rotating part, 3-sliding component, 3a-sliding part, 4-screw, 4a-support shaft, 5-shielding component, 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 base. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] This utility model has multiple embodiments, and the specific implementation methods are as follows:

[0039] 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 base 1 and a rotating member 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 member 2 and the support base 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 member 2 and the support base 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 member 2 rotates.

[0040] Furthermore, such as Figure 4-5 , Figure 10-11As 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.

[0041] 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.

[0042] 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.

[0043] 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 part 2 and the support base 1. The screw 4 serves as both the rotational support shaft between the rotating part 2 and the support base 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 rotational shaft between the rotating part 2 and the support base 1, and the disc spring 41 is fitted onto the rod. Both the rotating part 2 and the support base 1 have a shaft hole with a threaded section inside. 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 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 part 2, or between the cap and the support base 1, so that the cap directly compresses the disc spring 41 to deform elastically, thereby generating an elastic preload between the rotating part 2 and the support base 1. Alternatively, as... Figure 12As shown, the disc spring 41 can also be set between the support base 1 and the rotating part 2. When the screw 4 rotates, the cap will force the rotating part 2 to gradually approach the support base 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 part 2 and the support base 1.

[0044] 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.

[0045] Furthermore, to ensure the simple appearance of the rotating joint, the rotating component 2 or the support base 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.

[0046] Furthermore, a seat is provided, including a backrest and the aforementioned damping rotary joint. The damping rotary joint is disposed on the backrest to adjust the support position of the headrest 7 or lumbar support (not shown, for example, the support seat 1 can be directly or indirectly connected to the lower end of the backrest, and the rotating member 2 can be directly or indirectly connected to the lumbar support, allowing the user to adjust its support position by rotating the lumbar support with resistance; or, for example, the support seat 1 can be directly or indirectly connected to the upper end of the backrest, and the rotating member 2 can be directly or indirectly connected to the headrest 7, allowing the user to adjust its support position by rotating the headrest 7 with resistance; thereby meeting the user's needs.

[0047] 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.

[0048] 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 aforementioned rotating component 2 and sliding component 3. The rotating component 2 is rotatably connected to the support base 1 in the longitudinal direction, and the sliding component 3 is slidably connected to the rotating component 2 in the front-to-back direction. The blocking component 5 is installed on the sliding component 3. The rotating component 2, the sliding component 3, and the support base 1 constitute the aforementioned movable connection structure. At the same time, due to the presence of the blocking component 5, whether the headrest slides back and forth or rotates up and down, the blocking component 5 will move with the sliding component 3 or the rotating component 2 and surround the aforementioned movable connection structure, so that the entire headrest adjustment mechanism maintains a simple appearance while effectively avoiding safety issues such as pinching hands.

[0049] Furthermore, the installation structure of the slider 3 and the support base 1 is as follows: The slider 3 has an "I" shaped structure. The slider 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 base 1 includes two supports for rotatably connecting with the rotating member 2. The two supports are respectively located in the corresponding clearance areas. When the slider 3 slides back and forth, the clearance areas can effectively avoid the two supports. When the slider 3 slides to the foremost or rearmost end, the corresponding wide section will abut against the support to limit the slider 3 from continuing to slide to the foremost or rearmost end.

[0050] Furthermore, a disc spring 41 is provided between the rotating component 2 and the support base 1 to provide elastic preload, allowing the rotating component 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 component 2 and the sliding component 3, allowing the sliding component 3 to remain in the corresponding position after sliding forward and backward. Specifically, the sliding component 3 has a guide groove 31, and the rotating component 2 has a guide rail 21 that slides within the guide groove 31. A movable tooth 32 is rotatably connected to the sliding component 3, with a ratchet portion. The rotating component 2 has multiple ratchet grooves 22 spaced forward and backward. When the sliding component 3 slides forward, the ratchet portion switches between the multiple ratchet grooves 22. When the sliding component 3 slides to the foremost position, it resets backward using a cyclic reset structure. The cyclic reset structure includes a cyclic channel 23 on the rotating component 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 tooth 32 is provided with a guide part 321. When the slider 3 slides forward, the guide part slides in the sliding channel and gradually approaches the first conversion channel. When the slider 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 slider 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 slider 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 slider 3 slides forward and backward and adjusts the front and rear support position of the headrest 7.

[0051] 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 member 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.

[0052] Furthermore, the shielding part 5 and the movable part are connected by screws. Specifically, the shielding part 5 and the sliding part 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 integrally formed on the inner wall of the receiving space 51. The locking part is provided with screw holes, and the movable part is provided with corresponding through holes. The screw passes through the through holes and is screwed into the screw holes to fix the movable part and the shielding part 5.

[0053] 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.

[0054] Furthermore, a seat is provided, which, in addition to the aforementioned backrest, also includes the aforementioned concealed headrest adjustment mechanism. A base 1b is provided on the backrest, one end of which is integrally formed with a support seat 1, and the other end of the base 1b 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 at the upper end. The other end of the base 1b is plugged into the mounting seat, allowing the entire concealed headrest adjustment mechanism to be installed at the upper end of the backrest. When the concealed headrest adjustment mechanism is installed on the backrest, the entire upper structure of the seat becomes aesthetically pleasing, preventing hand pinching when adjusting the support position of the headrest 7.

[0055] Example 2: As 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. Specifically, the support base 1 includes two elastic support arms 1a, and the rotating member 2 is rotatably connected between the two support arms 1a. The disc spring 41 is provided between each support arm 1a and the rotating member 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 member 2 and the support base 1.

[0056] Example 3: As Figures 14a-14bAs shown, the headrest 7 in this embodiment only has a front-to-back sliding adjustment function or a vertical rotation adjustment function. Specifically, the movable part in this embodiment is a sliding part 3a that is slidably connected to the support base 1 or a rotating part 2a that is rotatably connected to the support base 1. However, whether it is the sliding part 3a or the rotating part 2a, they are both located within the accommodating space 51 of the shielding member 5, ensuring that when the headrest 7 is adjusting its support position, the sliding part 3a and the support base 1, or the rotating part 2a and the support base 1, will not be exposed.

[0057] 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 concealed headrest adjustment mechanism, characterized in that, It includes a support base (1) and a 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 recessed towards the end face of the movable part and forms an accommodating space (51) for concealing the movable connection structure. When the movable part moves in conjunction with the headrest (7) under the action of external force, the movable connection structure is always kept in the accommodating space (51) and is not exposed.

2. The concealed headrest adjustment mechanism according to claim 1, characterized in that: The moving part is a sliding part (3a) that is slidably connected to the support base (1).

3. The concealed headrest adjustment mechanism according to claim 1, characterized in that: The movable part is a rotating part (2a) that is rotatably connected to the support base (1).

4. The concealed headrest adjustment mechanism according to claim 1, characterized in that: The movable parts include a rotating part (2) and a sliding part (3). The rotating part (2) is rotatably connected to the support base (1) in the longitudinal direction, and the sliding part (3) is slidably connected to the rotating part (2) in the front-back direction. The blocking part (5) is installed on the sliding part (3). The rotating part (2), the sliding part (3), and the support base (1) constitute the movable connection structure.

5. The concealed headrest adjustment mechanism according to claim 4, characterized in that: The sliding member has an "I" shaped structure. The sliding member 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 base (1) includes two supports for rotatably connecting with the rotating member (2). The two supports are respectively located in the corresponding clearance areas.

6. The concealed headrest adjustment mechanism according to claim 1, characterized in that: The headrest is connected to the cover (5) so that the movable part is linked to the headrest (7).

7. The concealed headrest adjustment mechanism according to claim 1, characterized in that: The shield (5) is locked to the moving part by threaded fasteners.

8. A concealed headrest adjustment mechanism according to claim 6, characterized in that: The accommodating space (51) of the shielding part (5) is provided with a locking part, the locking part is provided with a threaded hole, the movable part is provided with a corresponding through hole, the threaded fastener passes through the through hole and screws into the threaded hole, and fixes the movable part and the shielding part (5) in place.

9. A concealed headrest adjustment mechanism according to claim 1, characterized in that: A handle (6) is attached to the shield (5).

10. A type of seat, characterized in that, Includes a chair back and the concealed headrest adjustment mechanism as described in claim 1. The chair back is provided with a base (1b), 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 chair back.

11. A seat according to claim 10, characterized in that: The other end of the base (1b) is inserted into the backrest; the base (1b) is a column, and the upper end of the backrest is provided with a mounting seat corresponding to the position of the base (1b). The mounting seat is a sleeve structure with an open upper end, and the other end of the base is inserted into the sleeve structure.

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