An electric lift headrest mechanism

Abstract

The utility model discloses a kind of electric lifting headrest mechanism, comprising: fixed frame, lifting frame, electric push rod, lifting frame includes headrest connecting piece, crossbeam, two interval parallelly arranged sliding vertical rods, two sliding vertical rods are slidably arranged in fixed frame, headrest connecting piece is connected between two sliding vertical rods, crossbeam is connected between two sliding vertical rods, crossbeam includes base plate, two opposite interval arrangement L type connecting piece, two L type connecting pieces are fixedly connected on base plate;The fixed end of electric push rod is pivotally connected with fixed frame, the slider of electric push rod is centrally arranged between two L type connecting pieces, the vertical arm of different L type connecting piece is fixedly connected with the two sides of slider respectively.The electric lifting headrest mechanism is not easy to shake when lifting, and has high stability.

Description

Technical Field

[0001] This utility model relates to the field of sofa technology, specifically to an electric lifting headrest mechanism. Background Technology

[0002] Existing electrically adjustable headrests used in sofas, such as the one in Chinese patent CN219645385U, have an electric push rod whose bottom is connected to a bearing on a wooden frame fixing square tube. Fixing plates are also connected to both sides of the wooden frame fixing square tube. The top of the electric push rod is connected to a bearing in the middle of a central shaft. Slide rail assemblies are located on both sides of the central shaft, and two support rods are symmetrically arranged on the central shaft. A headrest fixing plate is located at the top of the support rods. When the electric push rod is activated, the height of the headrest fixing plate is controlled via the central shaft and support rods. However, because the top of the electric push rod is fitted onto the central shaft via a bearing, during the lifting process, when the electric push rod applies force to the central shaft, the connection between the electric push rod and the central shaft is prone to misalignment and a single point of force application, causing an imbalance in the driving force on both sides. This can lead to the central shaft easily deflecting left or right. To avoid jamming, the clearance of the slide rail assembly needs to be set larger, resulting in wobbling during headrest lifting, poor stability, and a poor user experience. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art, the present invention provides an electric lifting headrest mechanism that is not easy to shake during lifting and has high stability.

[0004] To achieve the above objectives, this utility model discloses an electric lifting headrest mechanism, comprising: a fixed frame, a lifting frame, and an electric push rod. The lifting frame includes a headrest connector, a crossbeam, and two parallel sliding vertical rods spaced apart. Both sliding vertical rods are slidably mounted on the fixed frame. The headrest connector is connected between the two sliding vertical rods. The crossbeam is connected between the two sliding vertical rods. The crossbeam includes a base plate and two L-shaped connectors arranged at intervals opposite to each other. Both L-shaped connectors are fixedly attached to the base plate. The fixed end of the electric push rod is pivotally connected to the fixed frame. The slider of the electric push rod is centrally located between the two L-shaped connectors. The two sides of the slider are respectively fixedly connected to the vertical arms of different L-shaped connectors.

[0005] As an alternative implementation, the substrate is a planar plate parallel to the sliding vertical rod, and two L-shaped connectors are fixed to the same side of the substrate in the horizontal direction.

[0006] As an optional implementation, the horizontal arm of each L-shaped connector is fixedly connected to the lower end of a sliding vertical rod, and both the vertical arm and the horizontal arm of the L-shaped connector are fixedly connected to the base plate.

[0007] As an optional implementation, the L-shaped connector is also provided with reinforcing ribs, which are connected to the vertical arm and the horizontal arm.

[0008] As an optional implementation, the L-shaped connector is integrally welded to the substrate.

[0009] As an optional implementation, the fixing frame is provided with a number of sliding holes, and each sliding vertical rod is respectively inserted through at least two spaced sliding holes. At least some of the sliding holes are provided with sliding sleeves, and the sliding sleeves are slidably engaged with the sliding vertical rods.

[0010] As an alternative implementation, the sleeve is made of POM material.

[0011] As an optional implementation, the sliding sleeve includes an intermediate section, a first ring, and a second ring. The first ring and the second ring are respectively fixed to the two ends of the intermediate section. The intermediate section is located inside the sliding hole. The first ring and the second ring abut against the two end faces of the sliding hole. The sliding sleeve is also provided with a circumferential cut. The circumferential cut separates the intermediate section, the first ring, and the second ring, so that when the sliding sleeve is compressed and contracts circumferentially inward, at least one of the first ring and the second ring can pass through the sliding hole.

[0012] As an optional implementation, the circumferential cut is inclined to the axial direction of the sleeve.

[0013] As an optional implementation, the fixing frame is frame-shaped and includes an upper crossbar, a lower crossbar, and two side bars. The two ends of the upper crossbar are respectively connected to the upper ends of the two side bars, and the two ends of the lower crossbar are respectively connected to the lower ends of the two side bars. The fixed end of the electric push rod is pivotally connected to the middle of the lower crossbar. Each side bar is also provided with a fixing plate, which is arranged at intervals from the upper crossbar. The fixing plate is provided with a sliding hole, and the upper crossbar is provided with two sliding holes. The two sliding holes on the upper crossbar are arranged coaxially with the sliding holes on the two fixing plates, and each sliding hole is provided with a sliding sleeve.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The electric lifting headrest mechanism of this utility model optimizes the crossbeam in the lifting frame. It uses a base plate to fix two L-shaped connectors together, and then uses the two L-shaped connectors to fix them to both sides of the slider in the electric push rod, so that the slider is centered and the power output from the slider to the two L-shaped connectors is balanced. It is not easy to shake during lifting and has high stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1This is a structural schematic diagram of the electric lifting headrest mechanism according to an embodiment of the present utility model.

[0018] Figure 2 This is an exploded view of the electric lifting headrest mechanism according to an embodiment of the present invention.

[0019] Figure 3 This is a structural schematic diagram of the lifting frame according to an embodiment of the present utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the sliding sleeve according to an embodiment of the present utility model.

[0021] Figure 5 This is a partial cross-sectional view of the sliding vertical rod and the sliding sleeve in an embodiment of the present invention.

[0022] in:

[0023] 1. Fixed frame; 11. Upper crossbar; 12. Lower crossbar; 13. Side bar; 14. Fixed plate; 15. Sliding hole; 16. Sliding sleeve; 161. Middle section; 162. First ring; 163. Second ring; 164. Peripheral cut; 2. Lifting frame; 21. Headrest connector; 22. Crossbeam; 221. Base plate; 222. L-shaped connector; 2221. Vertical arm; 2222. Horizontal arm; 2223. Reinforcing rib; 23. Sliding vertical bar; 3. Electric push rod; 31. Fixed end; 32. Slider. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0027] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0028] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0029] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0030] Combination Figure 1 and Figure 2 In this embodiment, the electric lifting headrest mechanism includes: a fixed frame 1, a lifting frame 2, and an electric push rod 3. The lifting frame 2 is slidably disposed on the fixed frame 1, and the electric push rod 3 is connected to the fixed frame 1 and the lifting frame 2, so as to drive the lifting frame 2 to rise and fall relative to the fixed frame 1 by means of the electric push rod 3.

[0031] Both the fixed frame 1 and the lifting frame 2 are roughly frame-shaped. The fixed frame 1 includes an upper horizontal bar 11, a lower horizontal bar 12, and two side bars 13. The two ends of the upper horizontal bar 11 are respectively connected to the upper ends of the two side bars 13, and the two ends of the lower horizontal bar 12 are respectively connected to the lower ends of the two side bars 13. The lifting frame 2 includes a headrest connector 21, a crossbeam 22, and two parallel sliding vertical bars 23. Both sliding vertical bars 23 are slidably mounted on the fixed frame 1. The headrest connector 21 is connected between the two sliding vertical bars 23, and the crossbeam 22 is connected between the two sliding vertical bars 23. Specifically, there can be two headrest connectors 21, which are arranged vertically at intervals. One headrest connector 21 is connected to the upper end of the two sliding vertical bars 23, and the other headrest connector 21 is connected to the upper part of the middle of the two sliding vertical bars 23. The crossbeam 22 is connected to the lower end of the two sliding vertical bars 23. The crossbeam 22 includes a base plate 221 and two L-shaped connecting rods arranged at intervals. The two L-shaped connectors 222 are fixedly attached to the base plate 221 so that the base plate 221 and the two L-shaped connectors 222 form an integral structure, which can enhance the strength and stability of the crossbeam 22. The L-shaped connector 222 includes a vertical arm 2221 and a horizontal arm 2222 connected to each other. Preferably, the horizontal arm 2222 is fixedly attached to the lower end of the sliding vertical rod 23 (preferably by screwing, welding, etc.), and the vertical arm 2221 is fixedly attached to the slider 32 of the electric push rod 3 (preferably by screwing, plugging, etc.). Both the vertical arm 2221 and the horizontal arm 2222 are fixedly attached to the base plate 221 (preferably by welding, so that the L-shaped connector 222 and the base plate 221 are integrally welded together).

[0032] The fixed end 31 of the electric push rod 3 is pivotally connected to the fixed frame 1. Preferably, the fixed end 31 of the electric push rod 3 is pivotally connected to the middle of the lower crossbar 12. The slider 32 of the electric push rod 3 is centrally located between the two L-shaped connectors 222. The two sides of the slider 32 are respectively fixedly connected to the vertical arms 2221 of different L-shaped connectors 222.

[0033] In the above scheme, the significance of optimizing the crossbeam 22 as described above is that: the two L-shaped connectors 222 are fixedly connected by the base plate 221, and then the two L-shaped connectors 222 are respectively fixed to both sides of the slider 32 in the electric push rod 3, so that the slider 32 is centered, and the power output from the slider 32 to the two L-shaped connectors 222 is kept balanced, so that it is not easy to shake during lifting and lowering, and the stability is high.

[0034] See Figure 3 Preferably, the substrate 221 is a planar plate parallel to the sliding vertical rod 23, and the two L-shaped connectors 222 are fixed to the same side of the substrate 221 in the horizontal direction, so that the vertical arm 2221 and the horizontal arm 2222 of the L-shaped connector 222 are both fixed to the substrate 221, making the strength and stability of the beam 22 higher.

[0035] To further strengthen the crossbeam 22, it may also include a reinforcing rib 2223. The reinforcing rib 2223 may be specifically set on the L-shaped connector 222. The reinforcing rib 2223 is connected to the vertical arm 2221 and the horizontal arm 2222. The reinforcing rib 2223 on each L-shaped connector 222 may be one, two, or the like.

[0036] To enable the installation of the sliding vertical rod 23 on the fixed frame 1 and further improve the stability during lifting, refer to... Figure 1 , Figure 2 and Figure 5 In this embodiment, each side rod 13 is also provided with a fixing piece 14. Of course, multiple fixing pieces 14 can be spaced apart on each side rod 13. The fixing pieces 14 are spaced apart from the upper cross rod 11. Each fixing piece 14 has a sliding hole 15, and the upper cross rod 11 has two sliding holes 15. The two sliding holes 15 on the upper cross rod 11 are coaxially arranged with the sliding holes 15 on the two fixing pieces 14, respectively. Each sliding hole 15 is provided with a sliding sleeve 16, which slides in conjunction with the sliding vertical rod 23. Figure 1 When the indicated direction is for reference, specifically, the left sliding vertical rod 23 passes through the sliding sleeve 16 on the left side of the upper horizontal rod 11 and the sliding sleeve 16 on the left side rod 13, while the right sliding vertical rod 23 passes through the sliding sleeve 16 on the right side of the upper horizontal rod 11 and the sliding sleeve 16 on the right side rod 13.

[0037] By utilizing the function of the sliding sleeve 16, the fitting gap of the sliding vertical rod 23 in the sliding hole 15 can be eliminated or controlled, thereby improving the smoothness and stability during lifting. Furthermore, by using a frame-shaped fixing frame 1 to install the frame-shaped lifting frame 2, the overall lifting stability can be further improved, avoiding excessive friction caused by deviation during lifting.

[0038] It is understandable that the fixed frame 1 can also adopt other structures to enable the lifting frame 2 to slide relative to the fixed frame 1. Of course, it is preferable to control that the sliding holes 15 on the fixed frame 1 are provided with sliding sleeves 16. The sliding sleeves 16 can be provided in some of the sliding holes 15 or in all of the sliding holes 15.

[0039] Preferably, the slide sleeve 16 is made of POM material, which gives the slide sleeve 16 self-lubricating and wear-resistant properties, reducing friction and noise during lifting and lowering.

[0040] See Figure 4 and Figure 5To facilitate the installation of the sliding sleeve 16 and better eliminate the fitting gap of the sliding vertical rod 23 in the sliding hole 15, in this embodiment, the sliding sleeve 16 includes a middle section 161, a first ring 162, and a second ring 163. The first ring 162 and the second ring 163 are respectively fixed to both ends of the middle section 161, which is located inside the sliding hole 15. The first ring 162 and the second ring 163 abut against the end faces of both ends of the sliding hole 15. The sliding sleeve 16 is also provided with a peripheral cutout 164. 4. Disconnect the middle section 161, the first ring 162 and the second ring 163 so that when the sliding sleeve 16 is compressed and contracts inward in the circumferential direction, at least one of the first ring 162 and the second ring 163 can pass through the sliding hole 15, thereby realizing the quick installation and fixation of the sliding sleeve 16 in the sliding hole 15. In addition, due to the presence of the circumferential cut 164, the sliding sleeve 16 can produce a certain circumferential contraction or expansion, so that the sliding sleeve 16 can fit more precisely around the circumference of the sliding vertical rod 23, thereby preventing the sliding vertical rod 23 from shaking when it is raised and lowered.

[0041] Preferably, the circumferential cutout 164 is inclined to the axial direction of the sliding sleeve 16, so that there will be no axial gap when the sliding vertical rod 23 and the circumferential surface of the sliding sleeve 16 are fitted together.

[0042] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An electric lifting headrest mechanism, characterized in that, include: Fixture (1); The lifting frame (2) includes a headrest connector (21), a crossbeam (22), and two parallel sliding vertical rods (23) spaced apart. Both sliding vertical rods (23) are slidably mounted on the fixed frame (1). The headrest connector (21) is connected between the two sliding vertical rods (23). The crossbeam (22) is connected between the two sliding vertical rods (23). The crossbeam (22) includes a base plate (221) and two L-shaped connectors (222) spaced apart. Both L-shaped connectors (222) are fixed to the base plate (221). An electric push rod (3) is provided, with its fixed end (31) pivotally connected to the fixed frame (1). The slider (32) of the electric push rod (3) is centrally located between the two L-shaped connectors (222). The two sides of the slider (32) are respectively fixedly connected to the vertical arms (2221) of the different L-shaped connectors (222).

2. The electric lifting headrest mechanism according to claim 1, characterized in that, The substrate (221) is a planar plate parallel to the sliding vertical rod (23), and the two L-shaped connectors (222) are fixed to the same side of the substrate (221) in the horizontal direction.

3. The electric lifting headrest mechanism according to claim 2, characterized in that, The horizontal arm (2222) of each L-shaped connector (222) is fixedly connected to the lower end of a sliding vertical rod (23), and the vertical arm (2221) and horizontal arm (2222) of the L-shaped connector (222) are both fixedly connected to the base plate (221).

4. The electric lifting headrest mechanism according to claim 3, characterized in that, The L-shaped connector (222) is also provided with a reinforcing rib (2223), which is connected to the vertical arm (2221) and the horizontal arm (2222).

5. The electric lifting headrest mechanism according to claim 1, characterized in that, The L-shaped connector (222) is integrally welded to the substrate (221).

6. The electric lifting headrest mechanism according to any one of claims 1-5, characterized in that, The fixing frame (1) is provided with a plurality of sliding holes (15), and each sliding vertical rod (23) is respectively inserted through at least two spaced sliding holes (15). At least some of the sliding holes (15) are provided with sliding sleeves (16), and the sliding sleeves (16) are slidably engaged with the sliding vertical rods (23).

7. The electric lifting headrest mechanism according to claim 6, characterized in that, The sliding sleeve (16) is made of POM material.

8. The electric lifting headrest mechanism according to claim 6, characterized in that, The sliding sleeve (16) includes a middle section (161), a first ring (162), and a second ring (163). The first ring (162) and the second ring (163) are respectively fixed to both ends of the middle section (161). The middle section (161) is located inside the sliding hole (15). The first ring (162) and the second ring (163) respectively abut against the end faces of both ends of the sliding hole (15). The sliding sleeve (16) is also provided with a circumferential cut (164). The circumferential cut (164) disconnects the middle section (161), the first ring (162), and the second ring (163), so that when the sliding sleeve (16) is compressed and contracts circumferentially inward, at least one of the first ring (162) and the second ring (163) can pass through the sliding hole (15).

9. The electric lifting headrest mechanism according to claim 8, characterized in that, The circumferential cut (164) is inclined to the axial direction of the sliding sleeve (16).

10. The electric lifting headrest mechanism according to claim 6, characterized in that, The fixing frame (1) is frame-shaped and includes an upper crossbar (11), a lower crossbar (12), and two side bars (13). The two ends of the upper crossbar (11) are respectively connected to the upper ends of the two side bars (13), and the two ends of the lower crossbar (12) are respectively connected to the lower ends of the two side bars (13). The fixed end (31) of the electric push rod (3) is pivotally connected to the middle of the lower crossbar (12). Each side bar (13) is also provided with a fixing piece (14). The fixing pieces (14) are arranged at intervals from the upper crossbar (11). The fixing piece (14) is provided with a sliding hole (15). The upper crossbar (11) is provided with two sliding holes (15). The two sliding holes (15) on the upper crossbar (11) are coaxially arranged with the sliding holes (15) on the two fixing pieces (14). Each sliding hole (15) is provided with a sliding sleeve (16).

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