Headrest rotating and extending mechanism

Abstract

The utility model discloses a headrest rotation and extension mechanism, and the headrest rotation and extension mechanism is applied to electric furniture, and the headrest rotation and extension mechanism comprises: base assembly, connecting rod assembly, drive assembly, the connecting rod assembly includes at least one L-shaped headrest mounting bracket for installing the headrest, the drive assembly is installed to base assembly and is operably connected with connecting rod assembly, is used for moving at least one L-shaped headrest mounting bracket from the retracted position to the forward rotation position, and at the same time, at least one L-shaped headrest mounting bracket is moved to the upward extension position, so that when at least one L-shaped headrest mounting bracket moves from the retracted position to the forward rotation and upward extension position, the fabric on the headrest is kept tight and wrinkle-free, and the headrest assembly does not extrude the backrest assembly, and the utility model has the advantages that when adjusting the headrest, the fabric on the headrest is reduced to appear the wrinkle phenomenon.

Description

Technical Field

[0001] This utility model belongs to the field of electric seat technology, specifically relating to a headrest rotation and extension mechanism. Background Technology

[0002] Electric chairs contain multiple electric components, such as electric headrests, electric backrests, electric lumbar support, electric seat, and electric footrest. These electric components can be moved to different positions or states, enabling electric chairs or electric furniture to achieve a variety of different positions or states, such as upright, TV-watching, reclining, and height-adjustable positions, all of which are preset by the user of the electric chair.

[0003] For electric chairs or electric furniture equipped with electric headrests, the electric headrest can rotate and move around a horizontal axis between itself and the electric backrest, thereby supporting the user's head in multiple comfortable positions. When the electric headrest and the electric backrest are on the same plane, i.e., when the electric headrest is fully retracted, the fabric covering the electric headrest pad and the electric backrest pad remains taut and flat, presenting an aesthetically pleasing appearance. However, when the electric headrest rotates forward from its fully retracted position to any position that provides ideal and comfortable support for the user's head, the lower end of the electric headrest pad impacts the upper end of the electric backrest pad, thereby applying a squeezing or downward force to the upper end of the electric backrest pad. This causes noticeable wrinkles in the fabric covering the electric headrest pad and the electric backrest pad, resulting in a loss of flatness and affecting the aesthetics. To improve the flatness of the fabric on the headrest and backrest, a headrest rotation and extension mechanism is proposed. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art.

[0005] Therefore, this utility model proposes a headrest rotation and extension mechanism, which has the advantage of reducing wrinkles in the fabric on the headrest when adjusting the headrest.

[0006] According to an embodiment of the present invention, a headrest rotation and extension mechanism is applied to electric furniture, which includes a headrest and a backrest assembly. The headrest is covered with fabric. The headrest rotation and extension mechanism includes a base assembly, a linkage assembly, and a drive assembly. The linkage assembly includes at least one L-shaped headrest mounting bracket for mounting the headrest. The drive assembly is mounted on the base assembly and operably connected to the linkage assembly, for moving at least one L-shaped headrest mounting bracket from a retracted position to a forward rotation position, and simultaneously moving at least one L-shaped headrest mounting bracket to an upward extension position, such that when at least one L-shaped headrest mounting bracket moves from the retracted position to the forward rotation and upward extension positions, the fabric on the headrest remains taut and wrinkle-free, and the headrest does not compress the backrest assembly.

[0007] According to one embodiment of the present invention, the base assembly includes at least one backrest mounting bracket.

[0008] According to one embodiment of the present invention, the base assembly further includes: a lower crossbeam and an upper crossbeam; the drive assembly is mounted on the lower crossbeam; the upper crossbeam is operably connected to the linkage assembly, such that when the drive assembly extends, the drive assembly moves at least one L-shaped headrest mounting bracket from a retracted position to a forward-rotating and upward-extending position.

[0009] According to one embodiment of the present invention, it further includes at least one L-shaped mounting bracket, a limiting post, an eighth fastener, and a linkage assembly; at least one L-shaped mounting bracket is fixedly mounted on the upper crossbeam, and an arc-shaped groove and a sliding groove are formed on the at least one L-shaped mounting bracket; the limiting post is fixedly mounted on at least one backrest mounting bracket and disposed in the arc-shaped groove, such that when the drive assembly extends, at least one L-shaped mounting bracket rotates relative to the limiting post and moves upward; the eighth fastener is fixedly mounted on at least one L-shaped headrest mounting bracket and slidably disposed in the sliding groove; the linkage assembly operably connects at least one L-shaped mounting bracket fixedly mounted on the upper crossbeam to at least one L-shaped headrest mounting bracket, such that when the drive assembly extends, at least one L-shaped headrest mounting bracket rotates forward and extends upward.

[0010] According to one embodiment of the present invention, the linkage assembly includes: at least one arc-shaped link, at least one rotating link, and at least one upright link; the first end of at least one arc-shaped link is pivotally connected to the at least one backrest mounting bracket; at least one rotating link is pivotally mounted on at least one L-shaped mounting bracket, and its first end is pivotally connected to the second end of at least one arc-shaped link; the first end of at least one upright link is pivotally connected to the second end of the rotating link, and its second end is pivotally connected to the L-shaped headrest mounting bracket.

[0011] According to one embodiment of the present invention, the drive assembly includes a linear actuator.

[0012] According to one embodiment of the present invention, the linear actuator includes a bidirectional linear actuator.

[0013] According to one embodiment of the present invention, the linear actuator includes a unidirectional linear actuator.

[0014] According to one embodiment of the present invention, at least one spring is further included, the spring being operably connected between the lower crossbeam and the upper crossbeam such that when the unidirectional linear actuator extends to move the upper crossbeam and the L-shaped headrest mounting bracket from the retracted position to the forward-rotating and upward-extending position, the spring returns the upper crossbeam and the L-shaped headrest mounting bracket from the forward-rotating and upward-extending position to the retracted position.

[0015] According to one embodiment of the present invention, the linkage assembly includes: at least one arc-shaped connecting rod, at least one arc-shaped power connecting rod, and at least one straight connecting rod; the first end of at least one arc-shaped connecting rod is pivotally connected to at least one backrest mounting bracket; the first end of at least one arc-shaped power connecting rod is pivotally connected to the second opposite end of at least one arc-shaped connecting rod, and its second end is pivotally connected to at least one L-shaped headrest mounting bracket; the first end of at least one straight connecting rod is pivotally connected to at least one backrest mounting bracket, and its second opposite end is pivotally connected to at least one arc-shaped power connecting rod.

[0016] The beneficial effect of this utility model is that it uses a linkage assembly to connect the L-shaped headrest mounting bracket and the L-shaped mounting bracket. During the driving process of the drive assembly, the linkage assembly drives the L-shaped headrest mounting bracket to move upward under the limitation and guidance of the sliding groove and the arc groove. That is to say, when the L-shaped headrest mounting bracket is moved from the retracted position to the forward rotation position, it is moved to the upward extension position. This ensures that when the L-shaped headrest mounting bracket moves from the retracted position to the forward rotation and upward extension positions, the fabric on the headrest remains taut and wrinkle-free, and the headrest does not squeeze the backrest assembly.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments with accompanying drawings, in which:

[0020] Figure 1 This is a right-view 3D diagram showing the existing electric seat headrest in the retracted position.

[0021] Figure 2 This is a right-view 3D diagram showing the existing electric seat headrest in the forward position.

[0022] Figure 3This is a left rear perspective view of the first embodiment of the present invention, in which the headrest mounting bracket is in the retracted position;

[0023] Figure 4 This is a left rear perspective view of the first embodiment of the present invention, in which the headrest mounting bracket is in the forward extension position;

[0024] Figure 5 This is a utility model Figure 3 Enlarged schematic diagram of some connecting rod components of the middle connecting rod assembly after they have been made transparent;

[0025] Figure 6 This is a utility model Figure 3 Enlarged schematic diagram of some connecting rod components of the middle connecting rod assembly after they are hidden or made transparent;

[0026] Figure 7 This is a left rear perspective view of the second embodiment of the present invention, in which the headrest mounting bracket is in the retracted position;

[0027] Figure 8 This is a left rear perspective view of the second embodiment of the present invention, in which the headrest mounting bracket is in the forward extension position;

[0028] Figure label:

[0029] 100. Furniture; 102. Headrest; 104. Backrest; 200. Headrest Rotation and Extension Mechanism; 202. Base Assembly; 204. Linkage Assembly; 206. Drive Assembly; 208. Backrest Mounting Bracket; 210. Lower Crossbeam; 212. Connecting Bracket; 214. First Fastener; 216. Through Hole; 218. Upper Crossbeam; 220. Horizontal Leg; 222. L-shaped Mounting Bracket; 224. Second Fastener; 226. Third Fastener; 228. Vertical Leg; 230. Arc-shaped Groove; 232. Limiting Post; 234. Sliding Groove; 236. Rotating Linkage; 238. Fourth Fastener; 240. Arc-shaped connecting rod; 242, fifth fastener; 244, sixth fastener; 246, upright connecting rod; 248, seventh fastener; 249, first blade; 250, L-shaped headrest mounting bracket; 252, eighth fastener; 254, ninth fastener; 256, second blade; 260, first connector; 264, second connector; 266, first spring mounting bracket; 268, second spring mounting bracket; 270, spring; 372, tenth fastener; 374, arc-shaped power connecting rod; 376, eleventh fastener; 378, straight connecting rod; 380, twelfth fastener; 382, ​​thirteenth fastener. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] 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; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The headrest rotation and extension mechanism of this utility model embodiment is described in detail below with reference to the accompanying drawings.

[0034] Example 1, as Figure 3-6 As shown, the headrest rotation and extension mechanism 200 according to an embodiment of the present invention includes: a base assembly 202, a connecting rod assembly 204, and a drive assembly 206. The base assembly 202 includes a pair of opposing backrest mounting brackets 208. The lower end of each backrest mounting bracket 208 is provided with an inwardly extending connecting bracket 212. The backrest mounting brackets 208 and the connecting brackets 212 are integrally connected and fixedly connected to the lower crossbeam 210 by suitable first fasteners 214. Furthermore, the pair of opposing backrest mounting brackets 208 also have multiple through holes 216, through which the entire headrest rotation and extension mechanism 200 can be fixedly installed inside the backrest 104 of the furniture 100.

[0035] Furthermore, the base assembly 202 also includes an upper crossbeam 218, and the linkage assembly 204 includes an L-shaped mounting bracket 222. Both ends of the upper crossbeam 218 are fixedly mounted on the horizontal legs 220 of a pair of opposing L-shaped mounting brackets 222 via suitable second fasteners 224. Additionally, the pair of opposing L-shaped mounting brackets 222 are pivotally mounted on corresponding backrest mounting brackets 208 via suitable third fasteners 226. Each of the vertical legs 228 of the pair of opposing L-shaped mounting brackets 222 has an arc-shaped groove 230, and each backrest mounting bracket 208 has a limiting post 232 mounted at its upper end. When the L-shaped mounting bracket 222 pivots around the third fastener 226, the limiting post 232 can move within the corresponding arc-shaped groove 230. Furthermore, each L-shaped mounting bracket 222 has a generally vertical sliding groove 234 at its upper end of the vertical leg 228. The middle portion of a pair of opposing rotating links 236 is pivotally mounted to the middle portion of the vertical leg 228 of the L-shaped mounting bracket 222 via a suitable fourth fastener 238. The lower ends of a pair of opposing arc-shaped links 240 are pivotally connected to the upper end of the backrest mounting bracket 208 via suitable fifth fasteners 242, while their upper ends are pivotally connected to the first ends of the rotating links 236 via suitable sixth fasteners 244. The second ends of the pair of opposing rotating links 236 are pivotally connected to the lower ends of a pair of opposing upright links 246 via suitable seventh fasteners 248, while the upper ends of the upright links 246 are pivotally connected to the first blades 249 of a pair of opposing L-shaped headrest mounting brackets 250 via suitable eighth fasteners 252. The eighth fastener 252 passes through a sliding groove 234 on the vertical leg 228 of the L-shaped mounting bracket 222 and can slide within this groove 234. It should be noted that the eighth fastener 252 is connected to the upper part of the first blade 249 of the L-shaped headrest mounting bracket 250, allowing the L-shaped headrest mounting bracket 250 to slide along the sliding groove 234 on the vertical leg 228 of the L-shaped mounting bracket 222. Similarly, another pair of oppositely arranged ninth fasteners 254 also pass through the aforementioned sliding groove 234 and are connected to the lower part of the first blade 249 of the L-shaped headrest mounting bracket 250. The second blade 256 of the L-shaped headrest mounting bracket 250 is used to mount the headrest 102. The second blade 256 is integrally connected to the first blade 249.

[0036] The drive assembly 206 includes a linear actuator, the motor end of which is operably connected to the lower crossbeam 210 via a first connector 260; while the telescopic rod end of the linear actuator is operably connected to the upper crossbeam 218 via a second connector 264. The first connector 260 and the second connector 264 can be a fork connector or a pair of mounting brackets. When the linear actuator of the drive assembly 206 is activated and the telescopic rod end extends, the upper crossbeam 218 will lift upward, causing the pair of opposing L-shaped mounting brackets 222 to move upward; in fact, since the limiting post 232 can move within the arcuate groove 230, the L-shaped mounting brackets 222 will also move around the third fastener 226 (e.g., Figure 3 and Figure 4 (From the perspective shown) rotate counterclockwise. In this way, the L-shaped mounting bracket 222 moves upward and forward. As the L-shaped mounting bracket 222 moves upward and forward, the fourth fastener 238, mounted in the middle of its vertical leg 228, also moves upward and forward, thereby driving the rotating link 236 to move upward and forward.

[0037] Furthermore, since the rotating link 236 and the upright link 246 are connected by the seventh fastener 248, the upright link 246 will move upward as the eighth fastener 252 slides upward along the sliding groove 234. Therefore, the L-shaped headrest mounting bracket 250 connected to the upright link 246 will move upward, causing the headrest 102 to extend upward while rotating forward. In this way, not only can wrinkling of the fabric covering the headrest 102 and backrest 104 be effectively prevented, but also contact between the lower edge of the headrest 102 and the upper edge of the backrest 104 can be avoided, thus preventing the backrest 104 from bulging outward and ensuring user comfort.

[0038] The linear actuator of the drive assembly 206 is preferably a bidirectional linear actuator, but it can also be a unidirectional linear actuator. In this case, a pair of laterally spaced first spring mounting brackets 266 are fixedly mounted on the lower crossbeam 210, and a pair of laterally spaced second spring mounting brackets 268 are fixedly mounted on the upper crossbeam 218. The pair of first spring mounting brackets 266 and the pair of second spring mounting brackets 268 correspond one-to-one, and the corresponding first spring mounting brackets 266 and second spring mounting brackets 268 are connected to a spring 270. The two ends of the spring 270 are respectively connected to the first spring mounting brackets 266 and the second spring mounting brackets 268. When the linear actuator extends, the spring 270 will return the headrest 102 from the forward-extended position to the initial retracted position. During this process, if a foreign object is stuck between the headrest 102 and the frame of the furniture 100, the headrest 102 can be manually moved against the biasing force of the spring 270 to remove the foreign object.

[0039] Example 2, reference Figure 7-8The difference from Embodiment 1 is that the rotating link 236 is removed, and the first end of a pair of oppositely arranged arc-shaped links 240 is pivotally mounted on the middle of a pair of oppositely arranged backrest mounting brackets 208 via a suitable tenth fastener 372, while the second end is pivotally mounted on the lower end of a pair of oppositely arranged arc-shaped power links 374 via a suitable eleventh fastener 376.

[0040] Furthermore, the first ends of a pair of opposing straight connecting rods 378 are pivotally connected to the middle of the backrest mounting bracket 208 via a suitable twelfth fastener 380, while their second ends are pivotally connected to the middle of the arc-shaped power link 374 via a suitable thirteenth fastener 382. Additionally, the upper end of the arc-shaped power link 374 is pivotally connected to the first leaf 249 of a pair of opposing L-shaped headrest mounting brackets 250 via a suitable ninth fastener 254, which passes through a vertical sliding groove 234 on the vertical leg 228 of the L-shaped mounting bracket 222.

[0041] Similar to the operation of Embodiment 1, when the telescopic rod end of the linear actuator of the drive assembly 206 extends, the upper crossbeam 218 is lifted upward, causing the L-shaped mounting bracket 222 to move upward; since the limiting post 232 can move within the arc groove 230, the L-shaped mounting bracket 222 will rotate around the third fastener 226, thereby moving upward and forward.

[0042] Furthermore, due to the aforementioned movement of the L-shaped mounting bracket 222, and the pivotal connection between the upper end of the arc-shaped power link 374 and the vertical leg 228 of the L-shaped mounting bracket 222, the arc-shaped power link 374 pivots forward. Simultaneously, since the end of the arc-shaped power link 374 is also pivotally connected to the straight link 378 and the arc-shaped link member 240, the straight link 378 and the arc-shaped link member 240 rotate counterclockwise and move upward, thereby driving the L-shaped headrest mounting bracket 250 connected to the upper end of the arc-shaped power link 374 to move upward along the sliding groove 234. In this way, the headrest 102 extends upward while rotating forward. Therefore, it not only effectively prevents wrinkling of the fabric covering the headrest 102 and the backrest 104, but also prevents the lower edge of the headrest 102 from contacting the upper edge of the backrest 104, thereby preventing the backrest 104 from bulging outward and ensuring user comfort.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A headrest rotation and extension mechanism, applied to electric furniture, the electric furniture including a headrest (102) and a backrest assembly, the headrest (102) being covered with fabric; characterized in that, The headrest rotation and extension mechanism includes: Base assembly (202); Linkage assembly (204), the linkage assembly (204) includes at least one L-shaped headrest mounting bracket (250) for mounting the headrest (102). A drive assembly (206), which is mounted on the base assembly (202) and operably connected to the linkage assembly (204), is used to move at least one of the L-shaped headrest mounts (250) from a retracted position to a forward-rotated position and simultaneously move at least one of the L-shaped headrest mounts (250) to an upward-extended position, such that when at least one of the L-shaped headrest mounts (250) moves from the retracted position to the forward-rotated and upward-extended positions, the fabric on the headrest (102) remains taut and wrinkle-free, and the headrest (102) does not compress the backrest assembly.

2. The headrest rotation and extension mechanism according to claim 1, characterized in that, The base assembly (202) includes at least one backrest mounting bracket (208).

3. The headrest rotation and extension mechanism according to claim 2, characterized in that, The base assembly (202) also includes: The lower crossbeam (210) is on which the drive assembly (206) is mounted; The upper crossbeam (218) is operably connected to the linkage assembly (204) such that when the drive assembly (206) is extended, the drive assembly (206) moves at least one L-shaped headrest mount (250) from a retracted position to a forward-rotated and upward-extended position.

4. The headrest rotation and extension mechanism according to claim 3, characterized in that, Also includes At least one L-shaped mounting bracket (222) is fixedly mounted on the upper crossbeam (218), and at least one L-shaped mounting bracket (222) has an arc groove (230) and a sliding groove (234) formed on it. A limiting post (232) is fixedly installed on at least one backrest mounting bracket (208) and disposed in an arc-shaped groove (230) such that when the drive assembly (206) extends, at least one of the L-shaped mounting brackets (222) rotates and moves upward relative to the limiting post (232); The eighth fastener (252) is fixedly installed on at least one of the L-shaped headrest mounting brackets (250) and slidably disposed in the sliding groove (234); The linkage assembly operably connects at least one L-shaped mounting bracket (222) fixedly mounted on the upper crossbeam (218) to at least one L-shaped headrest mounting bracket (250) such that when the drive assembly (206) extends, at least one of the L-shaped headrest mounting brackets (250) rotates forward and extends upward.

5. The headrest rotation and extension mechanism according to claim 4, characterized in that, The linkage component includes: At least one arc-shaped link (240), the first end of at least one of the arc-shaped links (240) being pivotally connected to the at least one backrest mounting bracket (208). At least one rotating link (236), at least one of the rotating links (236) is pivotally mounted on at least one L-shaped mounting bracket (222), the first end of which is pivotally connected to the second end of at least one of the arcuate links (240); At least one upright link (246), the first end of at least one of the upright links (246) is pivotally connected to the second end of the rotating link (236), the second end of which is pivotally connected to the L-shaped headrest mounting bracket (250).

6. The headrest rotation and extension mechanism according to claim 1, characterized in that, The drive assembly (206) includes a linear actuator.

7. The headrest rotation and extension mechanism according to claim 6, characterized in that, The linear actuator includes a bidirectional linear actuator.

8. The headrest rotation and extension mechanism according to claim 6, characterized in that, The linear actuator includes a unidirectional linear actuator.

9. The headrest rotation and extension mechanism according to claim 8, characterized in that, It also includes at least one spring (270) operatively connected between the lower crossbeam (210) and the upper crossbeam (218) such that when the unidirectional linear actuator extends to move the upper crossbeam (218) and the L-shaped headrest mount (250) from the retracted position to the forward-rotating and upward-extending position, the spring (270) returns the upper crossbeam (218) and the L-shaped headrest mount (250) from the forward-rotating and upward-extending position to the retracted position.

10. The headrest rotation and extension mechanism according to claim 4, characterized in that, The linkage component includes: At least one arc-shaped link (240), the first end of at least one of the arc-shaped links (240) is pivotally connected to at least one backrest mounting bracket (208). At least one arc-shaped power link (374), the first end of at least one arc-shaped power link (374) is pivotally connected to the second opposite end of at least one arc-shaped link (240), the second end of which is pivotally connected to at least one L-shaped headrest mount (250). At least one straight link (378), the first end of at least one of the straight links (378) is pivotally connected to at least one backrest mounting bracket (208), and the second opposite end of the link is pivotally connected to at least one arcuate power link (374).

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