Headrest assembly of seat and seat

Abstract

The utility model discloses a headrest assembly of a seat and the seat. The headrest assembly of the seat comprises a support, a headrest, a shaft assembly, a locking piece and an elastic piece. A rotating seat is arranged on the back of the headrest, and a plurality of clamping parts arranged along an arc-shaped track are arranged on the outer edge surface of the rotating seat; a connecting seat is arranged on the support, the locking piece is movably installed on the connecting seat so that the locking piece can have the freedom degree of moving relative to the rotating seat along a linear track, the linear track is parallel to the plane where the arc-shaped track is located or falls on the plane where the arc-shaped track is located, and a clamping part is arranged at the end, facing the rotating seat, of the locking piece. The elastic piece is installed between the locking piece and the connecting base and used for providing elastic stress for pushing the locking piece towards the rotating base so that the clamping part can be combined with one clamping position part. The shaft assembly transversely penetrates through the rotating base and the connecting base. The headrest can provide stable support for the head and the neck of a user, and angle adjustment of the headrest can be completed conveniently and quickly.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a headrest assembly of a seat and the seat. Background Art

[0002] In order to provide better support for the human head and neck, current gaming chairs and study chairs generally install headrests on the top of the backrests. However, the headrests and backrests of most chairs are fixedly matched, and can only provide support in a fixed posture, which makes it difficult to meet the individual needs of users.

[0003] At present, there are also some seats that have adjustable headrests installed on the top of the backrests. Users can adjust the support angle of the headrest according to their body shape and different sitting postures to keep the headrest in an optimal supporting state. Although the existing adjustable headrests can adjust the support angle as needed, they provide damping through the static friction between the headrest and the backrest, and keep the position of the headrest fixed when providing support for the user's head and neck. In actual use, in order to enable the headrest to provide a larger support force value to stably support the user's head and neck, it is necessary to have a larger static friction between the headrest and the backrest. During the assembly process, the headrest and the backrest have a better degree of compression, but this causes the user to spend more time and effort when turning the headrest to adjust the angle of the headrest. When the compression between the headrest and the backrest is reduced during assembly, although the angle adjustment of the headrest can be facilitated, the headrest often rotates abnormally due to pressure when supporting the user's head and neck, making it difficult to provide better support. Utility Model Content

[0004] The utility model aims to provide a headrest assembly of a seat and a seat, which can provide relatively stable support for the head and neck of a user while facilitating the adjustment of the angle of the headrest.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A headrest assembly of a seat, comprising a bracket, a headrest, a shaft assembly, a locking member and an elastic member;

[0007] A rotating seat is arranged at the back of the headrest, and a plurality of locking portions arranged along an arc track are arranged on the outer edge surface of the rotating seat; a connecting seat is arranged on the bracket, and a locking member is movably mounted on the connecting seat so that the locking member has the freedom to move relative to the rotating seat along a straight track, and the straight track is parallel to the plane where the arc track is located, or falls on the plane where the arc track is located, and a clamping portion is arranged at one end of the locking member facing the rotating seat, and an elastic member is installed between the locking member and the connecting seat, and is used to provide an elastic stress for pushing the locking member toward the rotating seat so that the clamping portion is combined with one of the locking portions;

[0008] The shaft assembly crosses the rotating seat and the connecting seat to pivotally connect the rotating seat and the connecting seat together.

[0009] Preferably, the locking portion is a locking groove arranged on the outer edge surface of the rotating seat, and the engaging portion is a protruding tooth arranged on one end of the locking member facing the rotating seat.

[0010] Preferably, a first axial hole is provided on the rotating seat and a second axial hole is provided on the connecting seat, a first mating surface perpendicular to the axis of the first axial hole is formed on one side of the rotating seat, a second mating surface perpendicular to the axis of the second axial hole and abutting against the first mating surface is provided on the connecting seat, the shaft assembly includes an shaft head crossing the first axial hole and the second axial hole, a first connecting member crossing the shaft head, and a second connecting member, one end of the shaft head abuts against the rotating seat, one end of the first connecting member abuts against the other end of the shaft head, the second connecting member abuts against the connecting seat and is screwed together with the other end of the first connecting member.

[0011] Preferably, a recess is provided on the connecting seat for the rotating seat to be embedded, a second mating surface is formed on one side of the recess, the second axial hole extends from the second mating surface to the side surface of the connecting seat, the inner wall surface of the second axial hole is provided with a first snap-fitting portion and a second snap-fitting portion, a first mating portion is provided on the shaft head, the first mating portion and the first snap-fitting portion are engaged with each other so that the shaft head and the connecting seat are synchronously engaged, and a second mating portion is provided on the second connecting member, the second mating portion and the second snap-fitting portion are engaged with each other so that the second connecting member and the connecting seat are synchronously engaged.

[0012] Preferably, a receiving groove is provided on the bottom surface of the recessed position, which is recessed in a direction away from the rotating seat, and the locking member is movably embedded in the receiving groove. The elastic member is a spring placed in the receiving groove, and the two ends of the spring respectively press against the surface of the locking member away from the clamping portion and the bottom surface of the receiving groove.

[0013] Preferably, a boss is protruding from the surface of the locking member facing away from the clamping portion, a groove is provided on the bottom surface of the accommodating groove, one end of the spring is sleeved on the boss, and the other end is embedded in the groove.

[0014] Preferably, the cross-sections of the receiving groove and the locking member are both square, and the surface of the locking member is provided with ribs that are in sliding contact with the inner wall surface of the receiving groove, and the length direction of the ribs is consistent with the extension direction of the receiving groove.

[0015] Preferably, the inner wall surface of the first axial hole is provided with a boss extending along the circumference of the first axial hole, a limit groove is formed between the two end portions of the boss, one end of the shaft head is provided with a convex rib abutting against the side of the boss away from the first mating surface, and the outer circumferential surface of the shaft head is provided with a limit rib extending along the axial direction of the shaft head, and the limit rib is embedded in the limit groove so as to swing between the two ends of the limit groove.

[0016] Preferably, the first connecting member is a screw inserted into the shaft head, and the second connecting member is a nut threaded on the screw and embedded in the second shaft hole.

[0017] A seat comprises the headrest assembly of the seat mentioned above.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In the utility model, the rotating seat is placed on the back of the headrest, and the pressure exerted on the headrest by the user's head and neck will only have a small component force in the height direction. The small component force is not enough to overcome the elastic stress of the elastic member, ensuring that the clamping portion can be stably combined with the clamping portion to prevent the headrest from rotating abnormally, so that the headrest can provide stable support for the user's head and neck; when the angle of the headrest needs to be adjusted, the headrest is moved up and down, and since the torque driving the rotating seat to rotate is relatively large, the clamping portion can be separated from the clamping portion, so that the angle adjustment of the headrest can be completed conveniently and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a cross-sectional view of the utility model;

[0022] Figure 3 for Figure 2 AA section view;

[0023] Figure 4 for Figure 1 The structural diagram of the middle rotating seat;

[0024] Figure 5 for Figure 1 A schematic diagram of the structure of the middle connecting seat;

[0025] Figure 6 A view of the connection seat from another perspective;

[0026] Figure 7 for Figure 1 A schematic diagram of the structure of the middle locking member;

[0027] Figure 8 for Figure 1 Schematic diagram of the structure of the middle axis head;

[0028] Fig. 9 for Figure 1 Schematic diagram of the structure of the second connecting member.

[0029] Among them: 100, bracket; 10, connecting seat; 101, second matching surface; 102, concave position; 103, bottom surface; 11, second axial hole; 111, buckle groove; 112, boss; 12, receiving groove; 13, groove; 200, headrest; 20, rotating seat; 201, first matching surface; 21, first axial hole; 211, boss; 212, limiting groove; 22, clamping groove; 31, shaft head; 311, convex rib; 312, limiting rib; 313, protrusion; 32, second connecting member; 321, buckle groove; 33, first connecting member; 40, locking member; 41, convex tooth; 42, boss; 43, rib; 50, spring; DETAILED DESCRIPTION

[0030] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except for special instructions, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0031] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] like Figure 1 , 2, 3, 4, 5, 6, 7, 8, and 9 show a headrest assembly of a seat of the present invention, which includes a bracket 100, a headrest 200, a shaft assembly, a locking member 40, and a spring 50. A rotating seat 20 is provided at the back of the headrest 200. A plurality of slots 22 arranged along an arc track are provided on the outer edge surface of the rotating seat 20. The arc track is located on the YZ plane in the figure; a connecting seat 10 is provided on the bracket 100, and the locking member 40 is movably installed on the connecting seat 10, so that the locking member 40 has a linear track relative to the rotating seat 20. The linear trajectory falls on the YZ plane or is parallel to the YZ plane. The end of the locking member 40 facing the rotating seat 20 is provided with a convex tooth 41. The shape of the convex tooth 41 matches the shape of the slot 22. The spring 50 is installed between the locking member 40 and the connecting seat 10, and is used to provide an elastic stress for pushing the locking member 40 toward the rotating seat 20. Under the elastic stress of the spring 50, the convex tooth 41 on the locking member 40 always contacts the outer edge surface of the rotating seat 20, and then the convex tooth 41 is clamped into one of the slots 22. The shaft assembly crosses the rotating seat 20 and the connecting seat 10, and the rotating seat 20 and the connecting seat 10 are pivotally connected together. The locking member 40 is pushed toward the rotating seat 20 by the spring 50, so that the convex tooth 41 on the locking member 40 is combined with the slot 22 in a clamping manner, and then the rotation freedom of the rotating seat 20 relative to the connecting seat 10 is locked by the locking member 40.

[0034] During use, the convex teeth 41 on the locking member 40 are combined with one of the slots 22 to lock the rotating seat 20 and the connecting seat 10, thereby keeping the headrest 200 fixed relative to the bracket 100. The bracket 100 is installed on the top of the seat back. When the seat is in use, since the rotating seat 20 is placed on the back of the headrest 200, the pressure of the user's head and neck on the headrest 200 bracket is parallel to the YZ plane, and there is only a small angle between it and the front and rear movement direction of the locking member 40. Therefore, the pressure exerted by the user's head and neck on the headrest 200 will only have a small component force in the X direction of the figure, and this small component force is not enough to overcome the elastic force. The elastic stress of the spring 50 enables the convex tooth 41 to be stably combined with the slot 22, effectively preventing the headrest 200 from rotating abnormally due to the compression of the user's head during use, thereby enabling the headrest 200 to provide stable support for the user's head and neck. When the angle of the headrest 200 needs to be adjusted, the headrest 200 is pushed upward or downward in the X direction. At this time, since the torque driving the rotating base 20 to rotate is relatively large, the side of the slot 22 and the raised portion between adjacent slots 22 can squeeze the convex tooth 41, so that the convex tooth 41 can be disengaged from the slot 22 and inserted into other slots 22, so as to complete the angle adjustment of the headrest 200 conveniently and quickly.

[0035] In the utility model, the structure of the mutual connection between the locking member 40 and the rotating seat 20 is not limited to the above-mentioned convex teeth 41 and the slot 22. It can be that a plurality of locking portions are set on the outer edge surface of the rotating seat 20, and a corresponding locking portion is set on the end of the locking member 30 facing the rotating seat 20. As long as the locking portion can be combined with one of the locking portions to limit the rotational freedom of the rotating seat 20 relative to the connecting seat 10, for example, the locking portion can be a convex tooth set on the outer edge surface of the rotating seat 20, and the locking portion corresponds to the slot set on the locking member 40.

[0036] In a preferred embodiment, a first axial hole 21 is provided on the rotating seat 20, and a second axial hole 11 is provided on the connecting seat 10. The axes of the first axial hole 21 and the second axial hole 11 are consistent with the X direction in the figure. A first mating surface 201 perpendicular to the axis of the first axial hole 21 is formed on one side of the rotating seat 20, and a second mating surface 101 perpendicular to the axis of the second axial hole 11 is provided on the connecting seat 10, and the second mating surface 101 abuts against the first mating surface 201. The shaft assembly includes a shaft head 31, a first connecting member 33, and a second connecting member 32. One end of the shaft head 31 abuts against the rotating seat 20, one end of the first connecting member 33 abuts against the other end of the shaft head 31, and the second connecting member 32 abuts against the connecting seat 10 and is screwed on the other end of the first connecting member 33. The second connecting member 32 is tightened, and the shaft head 31, the rotating seat 20, and the connecting seat 10 are clamped by using the first connecting member 33 and the second connecting member 32, so that the first mating surface 201 on the rotating seat 20 and the second mating surface 101 on the connecting seat 10 are pressed against each other.

[0037] In this way, a certain static friction force is generated between the first mating surface 201 and the second mating surface 101, so that a certain damping effect is generated between the rotating seat 20 and the connecting seat 10, thereby preventing the headrest 200 from rotating abnormally, and further improving the stability of the headrest 200 in supporting the user's head and neck. The second connecting piece 32 can be rotated to adjust the compression between the first mating surface 201 and the second mating surface 101, and then the damping size between the rotating seat 20 and the connecting seat 10 can be adjusted to prevent the first mating surface 201 and the second mating surface 101 from being over-compressed, making it difficult to adjust the headrest 200.

[0038] A recess 102 is provided on the connecting seat 10, and the rotating seat 20 is embedded in the recess 102. By providing the recess 102 for the rotating seat 20 to be embedded on the connecting seat 10, the connecting seat 10 and the rotating seat 20 have a relatively small lateral dimension after being assembled together, making the entire headrest assembly more compact.

[0039] A second mating surface 101 is formed on one side of the concave position 102, and the second shaft hole 11 extends from the second mating surface 101 to the side of the connecting seat 10. A first buckling portion and a second buckling portion are provided on the inner wall surface of the second shaft hole 11, wherein the first buckling portion is a buckling groove 111 provided on the inner wall surface of the second shaft hole 11, and the second buckling portion is a boss 112 provided on the inner wall surface of the second shaft hole 11. A first matching portion is provided on the shaft head 31, and the first matching portion is specifically a protrusion 313 provided on the outer edge surface of the shaft head 31, and the protrusion 313 is clamped in the buckling groove 111, so that the shaft The head 31 is synchronously matched with the connecting seat 10, that is, the shaft head 31 is prevented from rotating relative to the connecting seat 10. A second matching portion is provided on the second connecting member 32, and the second matching portion is a buckle groove 321 provided on the peripheral surface of the second connecting member 32. The second connecting member 32 is embedded in the second shaft hole 11, and the boss 112 is clamped in the buckle groove 321, so that the second connecting member 32 is synchronously matched with the connecting seat 10, that is, the second connecting member 32 is prevented from rotating relative to the connecting seat 10. In this way, the shaft assembly is fixedly matched with the connecting seat 10, and the rotating seat 20 is rotatably matched with the shaft assembly.

[0040] The bottom surface 103 of the recess 102 is opposite to the outer edge surface of the rotating seat 20, and a receiving groove 12 is provided on the bottom surface 103. The receiving groove 12 is formed by the bottom surface 103 being recessed in the direction away from the rotating seat 20. The locking member 40 is movably embedded in the receiving groove 12. The extension direction of the receiving groove 12 is consistent with the above-mentioned straight line trajectory, which is used to guide the movement of the locking member 40. The spring 50 is placed inside the receiving groove 12, and its two ends respectively abut against the surface of the locking member 40 away from the convex tooth 41 and the bottom surface of the receiving groove 12.

[0041] A protruding column 42 is provided on the surface of the locking member 40 facing away from the convex tooth 41, and a groove 13 is provided on the bottom surface of the accommodating groove 12. One end of the spring 50 is sleeved on the protruding column 42 and the other end is embedded in the groove 13. The protruding column 42 and the groove 13 limit the spring 50, so that the spring 50 can stably apply elastic stress to the locking member 40.

[0042] In other embodiments, the spring 50 may be replaced by other elastic members, such as elastic rubber blocks, etc. The cross sections of the receiving groove 12 and the locking member 40 are both set to be square, so that the receiving groove 12 can better guide the locking member 40. Ribs 43 are provided on the surface of the locking member 40. The ribs 43 are in sliding contact with the inner wall surface of the receiving groove 12. The length direction of the ribs 43 is consistent with the extension direction of the receiving groove 12. The ribs 43 are in contact with the inner wall surface of the receiving groove 12 to reduce the friction between the locking member 40 and the inner wall surface of the receiving groove 12, so that the locking member 40 can slide smoothly inside the receiving groove 12.

[0043] The rotating seat 20 is rotatably matched with the shaft assembly. Specifically, a boss 211 extending along the circumference of the first shaft hole 21 is provided on the inner wall of the first shaft hole 21, and a limiting groove 212 is formed between the two ends of the boss 211. A convex rib 311 is provided on the shaft head 31, which abuts against the side of the boss 211 away from the first matching surface 201. The boss 211 is pressed by the convex rib 311, so that the first matching surface 201 can be abutted against the second matching surface 101. A limiting rib 312 is provided on the outer circumferential surface of the shaft head 31. The limiting rib 312 extends along the axial direction of the shaft head 31, and is embedded in the limiting groove 212 and can swing between the two ends of the limiting groove 212. The limiting rib 312 cooperates with the limiting groove 212 to limit the rotation range of the rotating seat 20 relative to the connecting seat 10, and then limit the rotation range of the headrest 200.

[0044] The first connecting member 33 may be a screw that passes through a through hole preset on the shaft head 31 , and the second connecting member 32 may be a nut that is threaded onto the screw and pre-placed in the second shaft hole 11 .

[0045] The seat of the utility model comprises the headrest assembly of the seat mentioned above, and other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0046] Finally, it should be noted that the above-mentioned implementation modes are only optional embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A headrest assembly of a seat, characterized in that: It includes a bracket, a headrest, a shaft assembly, a locking member and an elastic member; A rotating seat is arranged at the back of the headrest, and a plurality of locking portions arranged along an arc track are arranged on the outer edge surface of the rotating seat; a connecting seat is arranged on the bracket, and a locking member is movably mounted on the connecting seat so that the locking member has the freedom to move relative to the rotating seat along a straight track, and the straight track is parallel to the plane where the arc track is located, or falls on the plane where the arc track is located, and a clamping portion is arranged at one end of the locking member facing the rotating seat, and an elastic member is installed between the locking member and the connecting seat, and is used to provide an elastic stress for pushing the locking member toward the rotating seat so that the clamping portion is combined with one of the locking portions; The shaft assembly crosses the rotating seat and the connecting seat to pivotally connect the rotating seat and the connecting seat together.

2. The headrest assembly of a seat as claimed in claim 1, characterized in that: The clamping portion is a clamping groove arranged on the outer edge surface of the rotating seat, and the clamping portion is a convex tooth arranged on one end of the locking member facing the rotating seat.

3. The headrest assembly of a seat as claimed in claim 1, characterized in that: A first axial hole is provided on the rotating seat, and a second axial hole is provided on the connecting seat. A first mating surface perpendicular to the axis of the first axial hole is formed on one side of the rotating seat. A second mating surface perpendicular to the axis of the second axial hole and abutting against the first mating surface is provided on the connecting seat. The shaft assembly includes an shaft head crossing the first axial hole and the second axial hole, a first connecting member crossing the shaft head, and a second connecting member. One end of the shaft head abuts against the rotating seat, one end of the first connecting member abuts against the other end of the shaft head, and the second connecting member abuts against the connecting seat and is screwed together with the other end of the first connecting member.

4. The headrest assembly of a seat as claimed in claim 3, characterized in that: The connecting seat is provided with a recess for the rotating seat to be embedded, and a second mating surface is formed on one side of the recess. The second axial hole extends from the second mating surface to the side surface of the connecting seat, and the inner wall surface of the second axial hole is provided with a first snap-fitting portion and a second snap-fitting portion. The shaft head is provided with a first mating portion, and the first mating portion and the first snap-fitting portion are engaged with each other so that the shaft head and the connecting seat are synchronously engaged. The second connecting member is provided with a second mating portion, and the second mating portion and the second snap-fitting portion are engaged with each other so that the second connecting member and the connecting seat are synchronously engaged.

5. The headrest assembly of a seat as claimed in claim 4, characterized in that: A receiving groove is provided on the bottom surface of the recessed position, which is recessed in a direction away from the rotating seat. The locking member is movably embedded in the receiving groove. The elastic member is a spring placed in the receiving groove. The two ends of the spring respectively press against the surface of the locking member away from the clamping portion and the bottom surface of the receiving groove.

6. The headrest assembly of a seat as claimed in claim 5, characterized in that: A convex column is protrudingly arranged on the surface of the locking member away from the clamping portion, a concave groove is arranged on the bottom surface of the accommodating groove, one end of the spring is sleeved on the convex column, and the other end is embedded in the concave groove.

7. The headrest assembly of a seat as claimed in claim 5, characterized in that: The cross-sections of the receiving groove and the locking member are both square, and the surface of the locking member is provided with ribs that are in sliding contact with the inner wall surface of the receiving groove, and the length direction of the ribs is consistent with the extension direction of the receiving groove.

8. The headrest assembly of a seat as claimed in claim 3, characterized in that: The inner wall surface of the first axial hole is provided with a boss extending along the circumference of the first axial hole, and a limiting groove is formed between the two end portions of the boss. One end of the shaft head is provided with a convex rib abutting against the side of the boss away from the first mating surface. The outer circumferential surface of the shaft head is provided with a limiting rib extending along the axial direction of the shaft head. The limiting rib is embedded in the limiting groove so as to swing between the two ends of the limiting groove.

9. The headrest assembly of a seat as claimed in claim 3, characterized in that: The first connecting member is a screw which is inserted into the shaft head, and the second connecting member is a nut which is threaded on the screw and embedded in the second shaft hole.

10. A seat, characterized in that: A headrest assembly for a seat comprising any one of claims 1-9.

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