Sofa headrest adjusting device

Abstract

The utility model discloses a sofa headrest adjusting device which comprises a backrest and a headrest arranged at the top of the backrest, and a height adjusting mechanism is arranged between the headrest and the backrest. The height adjusting mechanism comprises a guide shaft extending up and down, a linear bearing is slidably connected to the guide shaft, a bearing sleeve is arranged outside the linear bearing and embedded in the headrest, and the bottom of the guide shaft is fixedly connected to the backrest. The height adjusting mechanism further comprises a threaded rod extending up and down, the top of the threaded rod is fixedly connected to the headrest, a screw sleeve is arranged outside the threaded rod and embedded in the backrest, a seat plate connected with the screw sleeve is arranged at the top of the backrest, an adjusting disc is rotationally connected to the seat plate, and the adjusting disc is fixedly connected to the headrest. A threaded hole coaxial with the screw sleeve is formed in the center of the adjusting disc, and the threaded rod is connected into the threaded hole in a threaded mode. The headrest adjusting device has the advantages of stepless adjustment and free adjustment, and is complete in overall function and high in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to furniture manufacturing technical field, more specifically, it relates to a sofa headrest adjusting device. BACKGROUND

[0002] The market sofa is equipped with headrest, a part of headrest height on sofa is adjustable, another part of headrest height on sofa is not adjustable. The height of adjustable headrest is mostly divided into several levels, and there is a height difference between adjacent levels, so that it cannot realize the adjustment of subtle height, and the overall effect is not good. Accordingly, the utility model provides a sofa headrest adjusting device. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of sofa headrest adjusting devices, which has the characteristics of stepless adjustment and easy adjustment.

[0004] To solve the above technical problems, the utility model aims at realizing as follows: a kind of sofa headrest adjusting device is involved in the utility model, including backrest and headrest arranged at the top of backrest, height adjusting mechanism is arranged between the headrest and backrest;

[0005] The height adjusting mechanism includes a guide shaft extending upward and downward, a linear bearing is connected to the guide shaft, a bearing sleeve is arranged outside the linear bearing, the bearing sleeve is embedded in the headrest, and the bottom of the guide shaft is fixedly connected to the backrest.

[0006] The height adjusting mechanism further includes a threaded rod extending upward and downward, the top of the threaded rod is fixedly connected to the headrest, a screw sleeve is arranged outside the threaded rod, the screw sleeve is embedded in the backrest, a seat plate connected to the screw sleeve is arranged at the top of the backrest, a adjusting disc is rotatably connected to the seat plate, a threaded hole coaxially arranged with the screw sleeve is arranged in the center of the adjusting disc, and the threaded rod is threadedly connected to the threaded hole.

[0007] The utility model is further provided as follows: the guide shaft is symmetrically arranged on both sides of the threaded rod.

[0008] The utility model is further provided as follows: the number of guide shafts is two.

[0009] The utility model is further provided as follows: an annular guide rail is arranged on the seat plate, an annular guide groove is arranged on the adjusting disc, and the annular guide rail is slidably connected to the annular guide groove.

[0010] The utility model is further provided as follows: a plurality of gear slots are arranged on the outer side of the adjusting disc.

[0011] In summary, the utility model has the following beneficial effects:

[0012] 1. The headrest height is adjustable, and the adjusting operation is convenient.

[0013] 2. The stepless adjusting mode is adopted, no gear is distinguished, and the adjusting effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 is the overall structure schematic view of the utility model;

[0015] Fig. 2 is the partial structure schematic view of the utility model;

[0016] Fig. 3 is the local structure schematic view of the utility model. DETAILED DESCRIPTION

[0017] In order to make the technical personnel in the art better understand the technical scheme of the utility model, the preferred implementation scheme of the utility model is described below in combination with specific embodiments, but it should be understood that these descriptions are only for further illustrating the features and advantages of the utility model, and are not the limitation of the utility model patent claim. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled person in the art without making creative labor belong to the scope of protection of the utility model.

[0018] The utility model is further illustrated below in combination with the drawings and the preferred embodiments.

[0019] Embodiment 1

[0020] Referring to Figs. 1 to 3 The sofa headrest adjusting device of the embodiment comprises a backrest 100 and a headrest 200 arranged at the top of the backrest, and a height adjusting mechanism is arranged between the headrest 200 and the backrest 100.

[0021] The height adjusting mechanism comprises a guide shaft 1 extending upward and downward, a linear bearing 2 is slidably connected to the guide shaft 1, a bearing sleeve 3 is arranged outside the linear bearing 2, the bearing sleeve 3 is embedded in the headrest 200, and the bottom of the guide shaft 1 is fixedly connected to the backrest 100.

[0022] The height adjusting mechanism further comprises a threaded rod 4 extending upward and downward, the top of the threaded rod 4 is fixedly connected to the headrest 200, a screw sleeve 5 is arranged outside the threaded rod 4, the screw sleeve 5 is embedded in the backrest 100, a seat plate 6 connected with the screw sleeve 5 is arranged at the top of the backrest 100, an adjusting disc 7 is rotatably connected to the seat plate 6, a threaded hole 8 coaxially arranged with the screw sleeve is formed in the center of the adjusting disc 7, and the threaded rod 4 is threadedly connected in the threaded hole 8.

[0023] Further, the guide shaft 1 is symmetrically arranged on both sides of the threaded rod 4.

[0024] Further, the number of the guide shafts 1 is two.

[0025] Further, the seat plate 6 is provided with an annular guide rail 9, and the adjusting disc 7 is provided with an annular guide groove (not marked), and the annular guide rail 9 is slidingly connected in the annular guide groove.

[0026] Further, the outer side surface of the adjusting disc 7 is provided with a tooth groove (not marked).

[0027] In the embodiment, by rotating the adjusting disc 7 clockwise, the threaded rod 4 carries the headrest 200 to move downward through threaded transmission, the threaded rod 4 further extends into the screw sleeve 5, and the distance between the headrest 200 and the backrest 100 is reduced. By rotating the adjusting disc 7 counterclockwise, the threaded rod 4 carries the headrest 200 to move upward through threaded transmission, the threaded rod 4 gradually extends out of the screw sleeve 5, and the distance between the headrest 200 and the backrest 100 is increased.

[0028] Among them, through the setting of the annular guide rail 9 matched with the annular guide groove, the sliding guide effect of the adjusting disc 7 relative to the seat plate 6 is realized.

[0029] Among them, through the setting of the tooth groove, the friction coefficient of the outer side surface of the adjusting disc 7 is increased, so that the manual driving of the adjusting disc 7 is more convenient.

[0030] The sofa headrest adjusting device relates to the technical field of sofa headrest adjusting devices, and has the advantages that the adjusting device can realize the adjustment of the height of the headrest, the adjustment operation is convenient, the device adopts a stepless adjustment mode, there is no gear position division, the adjustment effect is good, the overall function is perfect, and the practicality is strong.

[0031] In the utility model, if there are terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, the directions or position relationships are based on the actual shown directions or position relationships, and are only for the convenience of describing the utility model and simplifying the description, and therefore the directions or position relationships described in the utility model are only for example description, and cannot be understood as the limitation of the patent, and for the ordinary skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances in combination with the embodiments.

[0032] Unless otherwise clearly indicated and limited, in the present application, if the terms "provided", "connected" and "connected" are used, they should be understood broadly, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the existing technology according to the concept of the present application shall be within the protection scope determined by the claims.

Claims

1. A sofa headrest adjustment device comprising a backrest and a headrest provided at the top of the backrest, characterized in that: The headrest and the backrest are provided with a height adjusting mechanism; The height adjusting mechanism comprises a guide shaft extending upward and downward, a linear bearing is slidably connected to the guide shaft, a bearing sleeve is arranged outside the linear bearing, the bearing sleeve is embedded in the headrest, and the bottom of the guide shaft is fixedly connected to the backrest; The height adjusting mechanism further comprises a threaded rod extending upward and downward, the top of the threaded rod is fixedly connected to the headrest, a screw sleeve is arranged outside the threaded rod, the screw sleeve is embedded in the backrest, the top of the backrest is provided with a seat plate connected to the screw sleeve, a adjusting disc is rotatably connected to the seat plate, a threaded hole coaxially arranged with the screw sleeve is formed in the center of the adjusting disc, and the threaded rod is threadedly connected to the threaded hole.

2. The sofa headrest adjustment apparatus of claim 1, wherein: The guide shafts are arranged symmetrically on the left and right sides of the threaded rod.

3. The sofa headrest adjustment apparatus of claim 2, wherein: The number of the guide shafts is two.

4. The headrest adjustment device for a sofa according to any one of claims 1 to 3, characterized in that: An annular guide rail is arranged on the seat plate, an annular guide groove is arranged on the adjusting disc, and the annular guide rail is slidably connected to the annular guide groove.

5. The sofa headrest adjustment apparatus of claim 4, wherein: Tooth grooves are arranged on the outer side of the adjusting disc.

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