Sofa headrest with sprocket rack secondary drive mechanism

Abstract

The utility model provides a kind of chain sprocket rack two-stage transmission mechanism sofa head back cushion, including head back cushion and drive assembly, the drive assembly include driving shaft, walking rack and gear, the driving shaft is rotated by motor drive, the gear is transmission cooperation between driving shaft and can rotate under the driving of driving shaft, the walking rack rear side is engaged between gear, and the front side of walking rack is fixedly connected between head back cushion. In view of the deficiency of prior art, the utility model provides a kind of chain sprocket rack two-stage transmission mechanism sofa head back cushion, it can let sofa head back cushion can be adjusted to a certain extent, so that different height population can experience head support feeling, and massage effect is better.

Description

Technical Field

[0001] This utility model relates to the field of massage equipment, and in particular to a sofa headrest cushion with a sprocket and rack two-stage transmission mechanism. Background Technology

[0002] In modern home life, sofas, as essential furniture for daily rest and relaxation, are receiving increasing attention for their functionality and comfort. Furthermore, with rising living standards, people's demands for sofas have moved beyond basic seating and reclining functions. As a result, sofas with massage functions have emerged, integrating massage into traditional sofas. This allows people to enjoy the comfort and relaxation of a massage while resting, effectively relieving physical fatigue and adding more comfort and enjoyment to home life. However, existing sofas with massage functions still have some design shortcomings. For example, the backrest adjustment function is relatively simple, especially the headrest, which often cannot be adjusted up and down. In actual use, users of different heights, body types, and other characteristics may find these limitations. The usage scenarios for sofa headrests vary, leading to different height requirements. For example, taller users may prefer a higher headrest for better neck and shoulder support, while shorter users may prefer a lower headrest to avoid uncomfortable pressure on their heads. The headrest also needs to be adjustable in different positions, such as sitting upright, reclining, or fully reclining, to provide optimal support and fit, maximizing the massage effect and ensuring comfort. To address these issues, a sprocket and rack two-stage transmission mechanism is incorporated into the main body of the sofa with massage function, allowing for some degree of adjustment of the headrest. This ensures that people of different heights can experience adequate head support and a better massage effect. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a sofa headrest cushion with a sprocket and rack two-stage transmission mechanism, which allows the sofa headrest cushion to be adjusted to a certain extent, so that people of different heights can experience head support and better massage effect.

[0004] To achieve the above objectives, this utility model provides a sprocket and rack two-stage transmission mechanism for a sofa headrest cushion, including a headrest cushion and a drive assembly. The drive assembly includes a drive shaft, a traveling rack, and a gear. The drive shaft is driven to rotate by a motor. The gear is in transmission cooperation with the drive shaft and can rotate under the drive of the drive shaft. The rear side of the traveling rack meshes with the gear, and the front side of the traveling rack is fixedly engaged with the headrest cushion.

[0005] The advantages of the above technical solution are as follows: By setting up a drive assembly, which includes a drive shaft, a rack and pinion, and gears, the drive shaft is driven by a motor to rotate, which in turn drives the gears to rotate. Finally, the rack and pinion are fixed to the headrest and mesh with the gears, respectively. Thus, when the motor drives the drive shaft to rotate, the rack and pinion move up and down through the gears, thereby displacing the headrest. This allows the sofa headrest to be adjusted to a certain extent, providing head support for people of different heights and enabling each family member to find the most comfortable posture that best suits their needs on the sofa.

[0006] The present invention can be further configured such that: the drive assembly also includes a pulley and a mating shaft, the mating shaft is provided with a transmission part near one end, the two ends of the pulley are respectively fitted onto the transmission part and the drive shaft, and the other end of the mating shaft is positioned on a gear.

[0007] By further configuring the pulley and the mating shaft, the pulley is mounted on the transmission unit and drive shaft to achieve power transmission. The mating shaft passes through the positioning gear, which transmits the power from the pulley to the gear. Together with the traveling rack, it completes the smooth adjustment of the headrest, ensuring the stability of the product.

[0008] The present invention can be further configured such that: the two ends of the mating shaft are provided with rotatably connected mounting portions, and the mounting portions include ears extending radially to both sides.

[0009] With further modifications, a rotatable mounting part can be installed on the mating shaft using accessories such as bearings. This allows for rotational support of the mating shaft and the entire drive mechanism when the mounting part is connected to the sofa body via the upper ear, thus enhancing the product's stability.

[0010] The present invention can be further configured such that: both ends of the drive shaft are provided with a traveling rack, the rear side of the headrest is provided with a shaping plate, the shaping plate includes a flat connecting surface, and the two traveling racks are fixed on both sides of the connecting surface in the width direction.

[0011] With further modifications, racks are installed at both ends of the drive shaft, and a shaping plate is installed on the back of the headrest. This ensures that the headrest is subjected to uniform force during lifting and adjustment, avoiding tilting or jamming caused by force on one side. The shaping plate also ensures the stability of the rack position, preventing deformation of the rack due to deformation of the headrest, thus making the product run more stably.

[0012] This utility model can be further configured to include a sliding strip seat and a sliding strip, wherein the sliding strip seat and the sliding strip are respectively connected to the sofa back frame and the shaping plate, and the sliding strip seat and the sliding strip are in a guide sliding fit.

[0013] By further configuring the design plate and fixing the traveling rack to it, and then adding a sliding bar and a sliding bar seat, the sliding bar can provide support along the sliding bar seat, making the movement of the headrest more stable. This also ensures that the meshing of the dual traveling racks and gears remains precise, reducing the risk of jamming or wear and enhancing stability.

[0014] This utility model can be further configured such that inductive switches are provided at both ends of the sliding bar seat along its length.

[0015] With further settings, when the headrest cushion moves to the extreme positions at both ends of the slide bar along the slide bar seat, the sensor switch will quickly sense and trigger the power-off or limit mechanism to prevent the walking rack and gear from bumping and wearing due to excessive transmission. The extreme positions can also be determined by the sensor switches located at both ends, thus providing a self-checking function for the massage sofa. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the driving component in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of the sliding bar seat and the sliding bar in the embodiments of this utility model; Figure 4 This is a schematic diagram of the structure of the sofa body in an embodiment of the present utility model; Figure 5 This is a schematic diagram of the mating structure between the headrest and the lower backrest in an embodiment of this utility model; The components include: headrest 1; drive assembly 2; drive shaft 21; traveling rack 22; gear 23; pulley 24; mating shaft 25; transmission part 251; mounting part 252; ear part 253; sliding strip seat 3; sliding strip 4; motor 5; shaping plate 6; induction switch 7; and lower backrest 8. Detailed Implementation

[0017] An embodiment of this utility model of a sprocket and rack two-stage transmission mechanism for sofa headrest cushions is shown below. Figure 1-5 As shown: It includes a headrest cushion 1, a drive assembly 2, a sliding bar seat 3, and a sliding bar 4. The drive assembly 2 includes a drive shaft 21, a traveling rack 22, and a gear 23. The drive shaft 21 is driven to rotate by a motor 5. The gear 23 is in transmission cooperation with the drive shaft 21 and can rotate under the drive of the drive shaft 21. The rear side of the traveling rack 22 meshes with the gear 23, and the front side of the traveling rack 22 is fixedly engaged with the headrest cushion 1.

[0018] The drive assembly 2 also includes a pulley 24 and a mating shaft 25. The mating shaft 25 has a transmission part 251 near one end. The two ends of the pulley 24 are respectively mounted on the transmission part 251 and the drive shaft 21, and the other end of the mating shaft 25 is positioned on the gear 23.

[0019] The two ends of the mating shaft 25 are provided with rotatably connected mounting portions 252, and the mounting portions 252 include ear portions 253 extending radially on both sides.

[0020] Both ends of the drive shaft 21 are provided with a traveling rack 22, and the rear side of the headrest 1 is provided with a shaping plate 6. The shaping plate 6 includes a flat connecting surface 61, and the two traveling racks 22 are fixed on both sides of the connecting surface in the width direction.

[0021] The sliding strip seat 3 and the sliding strip 4 are respectively connected to the connecting surface 61 of the sofa back frame and the shaping plate 6, and are on the outer side of the relative walking rack 22, and the sliding strip seat 3 and the sliding strip 4 are in a guiding sliding fit.

[0022] Both ends of the sliding bar seat 3 along its length are provided with inductive switches 7. In this embodiment, the inductive switches 7 are micro switches, and their operating parts extend to the movement path of the sliding bar to determine the extreme positions of the sliding bar in two directions.

[0023] In this embodiment, as shown in the appendix Figure 5 As shown, after the headrest cushion 1 moves upward, a certain gap will be generated between the headrest cushion 1 and the lower backrest 8. Therefore, a connecting piece can be provided between the headrest cushion 1 and the lower backrest 8. During the lifting and lowering movement of the headrest cushion 1, it can drive the lower backrest 8 to lift and lower together, as shown in the attached diagram. Figure 5 In the middle, the dotted line indicates that the lower backrest 8 will move together with the headrest cushion 1 without leaving any gaps, making it more aesthetically pleasing. The connecting parts can be zippers, buttons, etc.

[0024] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.

Claims

1. A sofa headrest cushion with a sprocket and rack two-stage transmission mechanism, comprising a headrest cushion, characterized in that: It includes a drive assembly, which includes a drive shaft, a rack and a gear. The drive shaft is driven to rotate by a motor. The gear is in a transmission engagement with the drive shaft and can rotate under the drive of the drive shaft. The rear side of the rack meshes with the gear, and the front side of the rack is fixedly engaged with the headrest.

2. The sofa headrest cushion of the sprocket and rack two-stage transmission mechanism according to claim 1, characterized in that: The drive assembly also includes a pulley and a mating shaft. The mating shaft has a transmission part near one end. The two ends of the pulley are respectively fitted onto the transmission part and the drive shaft, and the other end of the mating shaft is positioned on a gear.

3. The sofa headrest cushion of the sprocket and rack two-stage transmission mechanism according to claim 2, characterized in that: The two ends of the mating shaft are provided with rotatable mounting parts, and the mounting parts include ears extending radially to both sides.

4. The sprocket and rack two-stage transmission mechanism for sofa headrest cushions according to claim 1, 2, or 3, characterized in that: Both ends of the drive shaft are provided with a traveling rack, and the rear side of the headrest is provided with a shaping plate. The shaping plate includes a flat connecting surface, and the two traveling racks are fixed on both sides of the connecting surface in the width direction.

5. The sofa headrest cushion of the sprocket and rack two-stage transmission mechanism according to claim 4, characterized in that: It includes a sliding strip seat and a sliding strip, which are respectively connected to the sofa back frame and the shaping plate, and the sliding strip seat and the sliding strip are guided and slidably engaged.

6. The sofa headrest cushion of the sprocket and rack two-stage transmission mechanism according to claim 5, characterized in that: Both ends of the sliding bar seat along its length are equipped with inductive switches.

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