Seat and headrest adjusting mechanism thereof

Abstract

The utility model relates to the field of seats, in particular to a seat and a headrest adjusting mechanism thereof. A headrest adjusting mechanism comprises a clamping assembly used for being fixedly connected to the upper end of a chair back in a clamping mode, a lifting base plate connected with the clamping assembly in a sliding mode, a headrest support connected to the upper end of the lifting base plate and a headrest frame hinged to the headrest support. A supporting surface for supporting the head is constructed on the headrest frame; the lifting base plate is provided with a sliding groove and a plurality of positioning groove openings formed in the moving direction of the sliding groove at intervals. The clamping assembly is arranged in the sliding groove of the lifting base plate in a sliding mode, and the clamping assembly is provided with an elastic pin assembly used for stretching into the positioning groove opening for positioning. According to the scheme, the height of the headrest can be simply and conveniently adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of seat, especially a seat and headrest adjusting mechanism thereof. BACKGROUND

[0002] The existing seat has very high requirement for comfort design, therefore, some existing seats not only include a seat back for supporting the back, but also include a headrest for supporting the head, but the height of the headrest needs to be adjusted up and down due to different sizes of consumers. For example, a headrest height adjusting mode disclosed in a Chinese patent with publication number CN201718807U is to set an oval long hole at the lower end of the headrest, and the headrest is connected with the back plate by a screw through the oval long hole at the lower end of the headrest. This structure is simple and low in cost, but the headrest adjusting process is relatively complex. For another example, another headrest height adjusting mode disclosed in a Chinese patent with publication number CN103287297A is to adjust the height of the headrest up and down by a worm driven by a motor. This structure makes the headrest adjusting convenient, but has the following disadvantages: the headrest adjusting structure is too complex, the manufacturing cost is too high, and there is a safety hazard in the motor driving. SUMMARY

[0003] In order to solve the above problems, the utility model aims at providing a headrest adjusting mechanism which can simply and conveniently adjust the height of the headrest.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A headrest adjusting mechanism, comprising a clamping assembly for clamping and fixing at the upper end of a seat back, a lifting base plate in sliding connection with the clamping assembly, a headrest support connected to the upper end of the lifting base plate, and a headrest frame hinged to the headrest support; a supporting surface for supporting the head is constructed on the headrest frame; characterized in that: a sliding groove is constructed on the lifting base plate, and a plurality of positioning slots are arranged at intervals along the moving direction of the sliding groove; the clamping assembly is slidingly arranged in the sliding groove of the lifting base plate, and an elastic pin assembly for extending into the positioning slots for positioning is arranged on the clamping assembly.

[0006] The utility model adopts the above technical scheme. The technical scheme relates to a headrest adjusting mechanism. The clamping assembly in the headrest adjusting mechanism can clamp the headrest at the upper end of the seat back. The supporting surface at the front end of the headrest frame can adopt a flexible pillow or a mesh cloth, etc. for supporting the head of the user. On this basis, the sliding groove and the plurality of positioning slots are constructed on the lifting base plate in the utility model. Since the clamping assembly is fixed at the upper end of the seat back, the lifting base plate can slide up and down relative to the clamping assembly. Then, the height of the lifting base plate is positioned by the elastic pin assembly on the clamping assembly clamped into the positioning slots, so as to determine the height of the headrest.

[0007] Based on the above scheme, the height of the headrest can be adjusted simply and conveniently.

[0008] In a specific scheme, a sliding block is embedded in the sliding slot of the lifting base plate, and the clamping assembly is fixed to the sliding block. The clamping assembly can move along the sliding slot in the longitudinal direction with the sliding block. In this scheme, the lifting of the lifting base plate relative to the clamping assembly is achieved based on the movement of the sliding block relative to the sliding slot.

[0009] In a further scheme, the sliding slot penetrates through the front and rear sidewalls of the lifting base plate, the sliding block is embedded in the sliding slot from the rear side, and the sliding block is at least partially inserted into the sliding slot and connected to the clamping assembly through the screwing component. A cover is detachably connected to the lifting base plate to close the opening of the sliding slot at the rear side. In this way, on the one hand, the clamping assembly is fixed to the sliding block, and on the other hand, the clamping assembly and the sliding block can clamp the two sides of the sliding slot, so that they cannot be separated from the sliding slot.

[0010] In addition, the cover can be used to close the opening of the sliding slot at the rear side for aesthetic purposes.

[0011] As a preferred embodiment, the clamping assembly comprises a clamping base and a clamping block fixed to the clamping base. A hook is formed on the clamping base to hook the upper end of the backrest framework, and the clamping block is fixed to the opening direction of the hook. The clamping block and the hook are combined to form a clamping opening for clamping the upper end beam of the backrest framework. During installation, the hook is first hung on the upper end of the backrest framework, and then the clamping block is fixed to the opening direction of the hook, so that the clamping opening formed between the two can clamp the upper end of the backrest framework.

[0012] Further, an installation groove is provided below the opening of the hook, the lower end of the clamping block is embedded in the installation groove and fixed by the screwing component, and the upper end of the clamping block is inserted into the opening of the hook to form the clamping opening. In this way, the clamping block is fitted and installed in the installation groove of the hook.

[0013] As a preferred embodiment, the headrest support is constructed as an open U-shaped support, the two ends of the headrest frame are hinged to the two ends of the U-shaped support, and the rear end of the U-shaped support is connected to the upper end of the lifting base plate. In this scheme, the two sides of the headrest frame can rotate along the two ends of the U-shaped support, and the stability is higher. In a specific embodiment, a rotating shaft is provided on the U-shaped end of the U-shaped support, and an arc-shaped groove is provided around the rotating shaft as the axis. A through hole is provided on the end of the headrest frame for the rotating shaft to pass through, and a limiting block is embedded in the arc-shaped groove. In this scheme, the rotating shaft is inserted into the through hole to serve as the rotating axis, and the limiting block is embedded in the arc-shaped groove to restrict the rotation range of the headrest frame.

[0014] Preferably, a shaft sleeve is arranged on the upper end of the lifting base plate, and the rear end of the headrest frame is provided with connecting ears on both sides of the shaft sleeve, and the connecting ears are locked and connected with the shaft sleeve through screwing components.

[0015] Preferably, a radially protruding protrusion is arranged on the side wall of the shaft sleeve, and a groove for accommodating the protrusion is formed on the headrest frame between the two connecting ears. During installation, the connecting ears on both sides of the rear end of the headrest frame are arranged on both sides of the shaft sleeve, the protrusion on the side wall of the shaft sleeve is embedded in the groove on the headrest frame, and then the screwing components are passed through the two connecting ears and the shaft sleeve to realize fastening.

[0016] The second object of the present application is to provide a seat comprising the headrest adjusting mechanism as described above. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the headrest adjusting mechanism.

[0018] Figure 2 It is a structural schematic diagram of the headrest adjusting mechanism connected to the upper end of the backrest.

[0019] Figure 3 It is an exploded view of the sliding structure in the headrest adjusting mechanism.

[0020] Figure 4 It is a connection schematic diagram of the lifting base plate and the headrest support.

[0021] Figure 5 It is a connection schematic diagram of the headrest support and the headrest frame.

[0022] Figure 6 It is a structural schematic diagram of the clamping assembly. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0024] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0025] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0026] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the indirect contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and inclined upward of the first feature above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and inclined downward of the first feature below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature. Example 1

[0028] As Figures 1-6As shown, the present embodiment relates to a headrest adjusting mechanism, which comprises a clamping assembly 21 for clamping the upper end of the chair back 10, a lifting base plate 22 in sliding connection with the clamping assembly 21, a headrest support 23 connected to the upper end of the lifting base plate 22, and a headrest frame 24 hinged to the headrest support 23; and a supporting surface for supporting the head is formed on the headrest frame 24. The clamping assembly 21 in the headrest adjusting mechanism can clamp the headrest on the upper end of the chair back 10, and the supporting surface at the front end of the headrest frame 24 can be a flexible pillow or a mesh cloth, etc. for supporting the user's head, which is not shown in the case.

[0029] On this basis, the lifting base plate 22 is formed with a sliding groove 221 and a plurality of positioning notches 222 arranged at intervals along the moving direction of the sliding groove 221. The clamping assembly 21 is slidingly arranged in the sliding groove 221 of the lifting base plate 22, and the clamping assembly 21 is provided with an elastic pin assembly 27 for extending into the positioning notches 222 for positioning. In the present embodiment, the lifting base plate 22 is formed with the sliding groove 221 and the plurality of positioning notches 222, and since the clamping assembly 21 is fixedly connected to the upper end of the chair back 10, the lifting base plate 22 can slide up and down relative to the clamping assembly 21, and then based on the elastic pin assembly 27 on the clamping assembly 21 being clamped into the positioning notches 222, the height of the lifting base plate 22 is positioned, thereby determining the height of the headrest.

[0030] In Figure 3 and 4 In the specific scheme as shown, the sliding groove 221 of the lifting base plate 22 is embedded with a sliding block 25, and the clamping assembly 21 is fixedly connected to the sliding block 25, so that the clamping assembly 21 can move longitudinally along the sliding groove 221 with the sliding block 25. In this scheme, the movement of the sliding block 25 relative to the sliding groove 221 causes the lifting base plate 22 to lift up and down relative to the clamping assembly 21. In a further scheme, the sliding groove 221 penetrates through the front and rear sidewalls of the lifting base plate 22, the sliding block 25 is embedded into the sliding groove 221 from the rear side, and the sliding block 25 at least partially penetrates through the sliding groove 221 to abut against the clamping assembly 21 and is connected by a screwing component. The lifting base plate 22 is detachably connected with a cover 26 for closing the opening of the sliding groove 221 at the rear side. In this way, on the one hand, the clamping assembly 21 is fixedly connected to the sliding block 25, and on the other hand, the clamping assembly 21 and the sliding block 25 can be clamped on both sides of the sliding groove 221, so that they cannot be detached from the sliding groove 221. Moreover, the cover 26 can be used to close the opening of the sliding groove 221 at the rear side for aesthetic purposes.

[0031] As Figure 6As shown, the clamping assembly 21 comprises a clamping base 211, and a clamping block 212 fixed to the clamping base 211. The clamping base 211 is provided with a hook 213 for hooking the upper end of the backrest 10 frame, and the clamping block 212 is fixed to the opening direction of the hook 213, and the combination between the clamping block 212 and the hook 213 forms a clamping opening for clamping the upper end beam of the backrest 10 frame. During installation, the hook 213 is first hung on the upper end of the backrest 10 frame, and then the clamping block 212 is fixed to the opening direction of the hook 213, so that the clamping opening formed between the two can clamp the upper end of the backrest 10 frame. Further, the opening of the hook 213 is provided with a mounting groove below, and the lower end of the clamping block 212 is adaptively embedded and fixed by screwing components. The upper end of the clamping block 212 extends into the opening of the hook 213 to form the clamping opening. In this way, the clamping block 212 is adaptively installed with the mounting groove on the hook 213.

[0032] As shown in Figure 4 and 5 The headrest support 23 is constructed as an open U-shaped support, and the two ends of the headrest frame 24 are hinged to the two ends of the U-shaped support, and the rear end of the U-shaped support is connected to the upper end of the lifting base plate 22. In this scheme, the two sides of the headrest frame 24 can rotate along the two ends of the U-shaped support, and the stability is higher. In a specific embodiment, the U-shaped end of the U-shaped support is provided with a rotating shaft 231 and an arc-shaped groove 232 with the rotating shaft 231 as the axis. The end of the headrest frame 24 is provided with a through hole 241 for the rotating shaft 231 to pass through, and a limiting block 242 embedded in the arc-shaped groove 232. In this scheme, the rotating shaft 231 extends into the through hole 241 to serve as the rotating axis, and the limiting block 242 is embedded in the arc-shaped groove 232 to restrict the rotation range of the headrest frame 24. As a preferred, the upper end of the lifting base plate 22 is provided with a shaft sleeve 224, and the rear end of the headrest frame 24 is provided with connecting ears 243 on both sides of the shaft sleeve 224, and the connecting ears 243 and the shaft sleeve 224 are locked and connected by screwing components. As a preferred, the side wall of the shaft sleeve 224 is provided with a radially protruding protrusion 225, and the headrest frame 24 is formed with a groove 244 between the two connecting ears 243 for accommodating the protrusion 225. During installation, the connecting ears 243 on both sides of the rear end of the headrest frame 24 are arranged on both sides of the shaft sleeve 224, and the protrusion 225 on the side wall of the shaft sleeve 224 is embedded in the groove 244 on the headrest frame 24, and then the screwing components are passed through the two connecting ears 243 and the shaft sleeve 224 to achieve fixation. Embodiment 2

[0033] The second object of the present application is to provide a seat comprising the headrest adjusting mechanism as described in embodiment 1.

[0034] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model. The ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model without departing from the principles and purposes of the utility model.

Claims

1. A headrest adjustment mechanism, comprising a clamping assembly (21) for clamping and fixing to the upper end of a chair back (10), a lifting base plate (22) slidably connected to the clamping assembly (21), a headrest bracket (23) connected to the upper end of the lifting base plate (22), and a headrest frame (24) hinged to the headrest bracket (23); the headrest frame (24) has a support surface for supporting the head; characterized in that: The lifting base plate (22) is provided with a sliding groove (221) and a plurality of positioning slots (222) arranged at intervals along the moving direction of the sliding groove (221); the clamping assembly (21) is slidingly arranged in the sliding groove (221) of the lifting base plate (22), and the clamping assembly (21) is provided with an elastic pin assembly (27) for extending into the positioning slots (222) to be positioned.

2. A headrest adjustment mechanism according to claim 1, characterised in that: The sliding groove (221) of the lifting base plate (22) is embedded with a sliding block (25), and the clamping assembly (21) is fixedly connected to the sliding block (25), so that the clamping assembly (21) can move longitudinally along the sliding groove (221) with the sliding block (25).

3. A headrest adjustment mechanism according to claim 2, wherein: The sliding groove (221) penetrates through the front and rear sidewalls of the lifting base plate (22), the sliding block (25) is embedded into the sliding groove (221) from the rear side, and the sliding block (25) at least partially penetrates through the sliding groove (221) and is connected to the clamping assembly (21) through a screwing component; the lifting base plate (22) is detachably connected with a cover (26) for closing the opening of the rear side of the sliding groove (221).

4. The headrest adjustment mechanism according to any one of claims 1 to 3, characterized in that: The clamping assembly (21) comprises a clamping base (211) and a clamping block (212) fixedly connected to the clamping base (211); the clamping base (211) is provided with a hook (213) for hooking the upper end of the framework of the chair back (10), and the clamping block (212) is fixedly connected to the opening direction of the hook (213), and the clamping block (212) and the hook (213) are combined to form a clamping opening for clamping the upper end beam of the framework of the chair back (10).

5. A headrest adjustment mechanism according to claim 4, wherein: The opening of the hook (213) is provided with a mounting groove, the lower end of the clamping block (212) is embedded in the mounting groove and is fixedly connected through a screwing component; the upper end of the clamping block (212) extends into the opening of the hook (213) to form the clamping opening.

6. The headrest adjustment mechanism of claim 1, wherein: The headrest support (23) is constructed as an open U-shaped support, both ends of the headrest frame (24) are hingedly connected to both ends of the U-shaped support, and the rear end of the U-shaped support is connected to the upper end of the lifting base plate (22).

7. A headrest adjustment mechanism according to claim 6, wherein: The U-shaped end of the U-shaped support is provided with a rotating shaft (231) and an arc-shaped groove (232) with the rotating shaft (231) as the axis; the end of the headrest frame (24) is provided with a through hole (241) for the rotating shaft (231) to pass through, and a limiting block (242) embedded in the arc-shaped groove (232).

8. A headrest adjustment mechanism according to claim 6, wherein: The upper end of the lifting base plate (22) is provided with a shaft sleeve (224), the rear end of the headrest frame (24) is provided with a connecting lug (243) on both sides of the shaft sleeve (224), and the connecting lug (243) and the shaft sleeve (224) are locked and connected through a screwing component.

9. A headrest adjustment mechanism according to claim 8, wherein: The sidewall of the shaft sleeve (224) is provided with a radially protruding protrusion (225), and the headrest frame (24) is formed with a groove (244) for accommodating the protrusion (225) between the two connecting lugs (243).

10. A seat, characterized by: A headrest adjusting mechanism comprising any one of claims 1-9.

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