Headrest assembly, seat and terminal equipment

Abstract

The invention discloses a headrest assembly, a seat and terminal equipment, and relates to the technical field of seat structures of the terminal equipment, the headrest assembly comprises a mounting seat, a supporting frame and a headrest, the mounting seat is used for being mounted on a seat backrest; the supporting frame can be installed on the installation base in an up-down movable mode, a first limiting assembly is arranged between the supporting frame and the installation base, and the first limiting assembly is used for positioning the supporting frame to the installation base when the supporting frame is located at multiple different positions in the up-down direction; the headrest is installed on the supporting frame in a front-back movable mode, a second limiting assembly is arranged between the headrest and the supporting frame, and the second limiting assembly is used for positioning the headrest on the supporting frame when the headrest is located at multiple different positions in the front-back direction. The invention aims to provide a seat headrest capable of being adjusted in multiple directions.

Description

Technical Field

[0001] The present invention relates to the technical field of terminal device seat structures, and in particular to a headrest assembly, a seat and a terminal device. Background Art

[0002] The seats in the terminal equipment cabin must ensure a comfortable sitting position for different people in different postures. At the same time, the headrests must be adjusted according to different heights and sitting postures to provide comfortable support for the head. Summary of the Invention

[0003] The main purpose of the present invention is to provide a headrest assembly, a seat and a terminal device, aiming to provide a seat headrest that can be adjusted in multiple directions.

[0004] To achieve the above objectives, the present invention provides a headrest assembly, wherein the headrest assembly comprises:

[0005] A mounting base for mounting on a seat back;

[0006] a support frame movably mounted on the mounting seat in an up-and-down direction, and a first position-limiting assembly is provided between the support frame and the mounting seat, the first position-limiting assembly being used to position the support frame on the mounting seat when the support frame is located at a plurality of different positions in the up-and-down direction; and

[0007] A headrest can be movably installed on the support frame forward and backward, and a second limiting component is provided between the headrest and the support frame. The second limiting component is used to position the headrest on the support frame when the headrest is located at multiple different positions in the forward and backward directions.

[0008] In one embodiment, the first limiting assembly includes a plurality of first limiting portions respectively arranged on one of the mounting seat and the support frame, and a first limiting piece arranged on the other of the mounting seat and the support frame. The plurality of first limiting portions are spaced apart in the up and down directions, and the first limiting piece can be movably arranged so that the first limiting piece has a limiting position cooperating with the first limiting portion and a movable position disengaged from the first limiting portion.

[0009] In one embodiment, the first limiting assembly includes a first limiting rack arranged on one of the mounting seat and the support frame, the first limiting rack extends in the up and down directions, the first tooth groove on the first limiting rack forms the first limiting portion, and the first limiting member has a limiting position extending into the first tooth groove and a movable position out of the first tooth groove.

[0010] In one embodiment, a first elastic reset member is further provided on a side of the first limiting member facing away from the first tooth groove, and the first elastic reset member is used to reset the first limiting member to the limiting position extending into the first tooth groove.

[0011] In one embodiment, both side walls of the first tooth groove are inclined to form a first guiding slope, so that when the support frame moves up and down, the first limiting member can move along the first guiding slope to escape from the first tooth groove.

[0012] In one embodiment, a limiting structure is provided on one of the headrest and the support frame, and a matching structure is provided on the other side. The second limiting assembly includes a plurality of second limiting portions provided on the limiting structure, and a second limiting piece provided on the matching structure. The plurality of second limiting portions are spaced apart in the front-to-back direction, and the second limiting piece can be movably provided to have a limiting position that matches the second limiting portion and a movable position that is separated from the second limiting portion.

[0013] In one embodiment, the limiting structure includes a second limiting rack, which extends along the front-to-back direction. The second tooth groove on the second limiting rack forms the second limiting portion, and the second limiting member has a limiting position extending into the second tooth groove and a movable position out of the second tooth groove.

[0014] In one embodiment, a second elastic reset member is further provided on a side of the second limiting member facing away from the second tooth groove, and the second elastic reset member is used to reset the second limiting member to the limiting position extending into the second tooth groove.

[0015] In one embodiment, a second guide slope is formed on one side of the groove walls on both sides of the second tooth groove, and a stop surface is formed on the other side, so that when the headrest moves forward, the second limiting member can move along the second guide slope to escape from the second tooth groove, and when the headrest moves backward, the stop surface stops the second limiting member.

[0016] In one embodiment, the second limiting assembly further includes an adjusting member movably disposed on the mating structure, and in the movable stroke of the adjusting member, there is an adjusting position for cooperating with the second limiting member to limit the second limiting member to the movable position, and a disengaging position for disengaging from the second limiting member.

[0017] In one embodiment, the second limiting member can be movably arranged in the matching structure along the left-right direction, and the adjusting member can be movably arranged in the matching structure along the front-back direction. The adjusting member is provided with an accommodating notch on one side facing the second limiting member, and the second limiting member is placed in the accommodating notch so that the second limiting member is limited to the movable position.

[0018] In one embodiment, a driving part is provided on the adjusting member, and the driving part and the second limiting rack are stacked up and down, so that when the headrest moves relative to the support frame, the second limiting rack frictionally drives the driving part to move relative to the headrest, so that the adjusting member moves back and forth on the matching structure.

[0019] In one embodiment, an elastic supporting member is further provided on a side of the driving portion facing away from the second position-limiting rack, and the elastic supporting member is used to support the driving portion against the second position-limiting rack.

[0020] The present invention further provides a seat, wherein the seat comprises:

[0021] chair seat;

[0022] a seat back mounted to the seat; and

[0023] A headrest assembly, the headrest assembly includes a mounting seat, a support frame and a headrest, the mounting seat is used to be installed on the seat back; the support frame can be movably installed on the mounting seat up and down, and a first limiting assembly is provided between the support frame and the mounting seat, the first limiting assembly is used to position the support frame on the mounting seat when the support frame is located at multiple different positions in the up and down directions; the headrest can be movably installed on the support frame forward and backward, and a second limiting assembly is provided between the headrest and the support frame, the second limiting assembly is used to position the headrest on the support frame when the headrest is located at multiple different positions in the front and back directions.

[0024] The present invention also proposes a terminal device, wherein the terminal device includes a seat, the seat includes a seat, a seat back and a headrest assembly, the seat back is installed on the seat; the headrest assembly includes a mounting seat, a support frame and a headrest, the mounting seat is used to be installed on the seat back; the support frame can be movably mounted on the mounting seat up and down, and a first limiting assembly is provided between the support frame and the mounting seat, the first limiting assembly is used to position the support frame on the mounting seat when the support frame is located at multiple different positions in the up and down directions; the headrest can be movably mounted on the support frame forward and backward, and a second limiting assembly is provided between the headrest and the support frame, the second limiting assembly is used to position the headrest on the support frame when the headrest is located at multiple different positions in the forward and backward directions.

[0025] In the technical solution of the present invention, in order to meet the sitting comfort of different groups of people after adjusting the seat, an adjustable headrest assembly is proposed. The headrest assembly is used to adjust the position of the headrest in the up-down direction and the front-back direction, thus meeting the needs of different groups of people, and the adjustment freedom is large and more applicable. Specifically, the headrest can be mounted on the support frame movably forward and backward, and the position of the headrest in the front-back direction is positioned by the second limiting assembly to provide forward support for the head. On this basis, the support frame can be mounted on the mounting seat movably upward and downward. Similarly, the first limiting assembly is provided between the support frame and the mounting seat to position the support frame and the headrest located on the support frame in the up-down direction by the first limiting assembly to provide support adapted to the height of the head. The overall structure is mounted on the seat back through the mounting seat, which has a simple structure, is easy to use, and has a good effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a seat provided by the present invention;

[0028] Figure 2 A schematic plan view of the structure of a headrest assembly according to an embodiment of the present invention;

[0029] Figure 3 for Figure 2 Another planar structural schematic diagram of the middle headrest assembly;

[0030] Figure 4 for Figure 2 Another planar structural schematic diagram of the middle headrest assembly;

[0031] Figure 5 for Figure 2 A three-dimensional exploded diagram of the center headrest assembly;

[0032] Figure 6 for Figure 2 Another exploded perspective view of the center headrest assembly;

[0033] Figure 7 for Figure 2 A schematic diagram of the three-dimensional structure of the first limiting assembly in the middle headrest assembly;

[0034] Figure 8 for Figure 6 A partial enlarged view of point A in the middle;

[0035] Figure 9 for Figure 2 Schematic diagram of a planar explosion of the center headrest assembly with the headrest adjusted to the rearmost position of maximum travel;

[0036] Figure 10 for Figure 9 A schematic diagram of the planar structure of the second limiting component in FIG.

[0037] Figure 11 for Figure 2 Schematic diagram of a planar explosion of the center headrest assembly with the headrest adjusted to the maximum forward travel position;

[0038] Figure 12 for Figure 11 Schematic diagram of the planar structure of the second limiting component.

[0039] Description of Figure Numbers:

[0040] 1000. Seat; 100. Headrest assembly; 1. Mounting seat; 2. Support frame; 3. Headrest; 4. First position-limiting assembly; 41. First position-limiting rack; 411. First tooth groove; 411a. First guide slope; 42. First position-limiting member; 43. First elastic return member; 5. Second position-limiting assembly; 51. Second position-limiting rack; 511. Second tooth groove; 511a. Second guide slope; 511b. Stop surface; 512. Maintaining portion; 52. Second position-limiting member; 53. Second elastic return member; 54. Adjusting member; 541. Accommodating notch; 542. Driving portion; 543. Elastic supporting member; 200. Chair seat; 300. Seat back.

[0041] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] The seats in the terminal equipment cabin must ensure a comfortable sitting position for different people in different postures. At the same time, the headrests must be adjusted according to different heights and sitting postures to provide comfortable support for the head.

[0046] In view of this, the present invention proposes a headrest assembly, please refer to Figures 1 to 12 , is an embodiment of the headrest assembly proposed in this application, and the headrest assembly will be described in detail below with reference to specific drawings.

[0047] See also Figures 1 to 6 The headrest assembly 100 includes a mounting seat 1, a support frame 2 and a headrest 3, wherein the mounting seat 1 is used to be installed on the seat back 300; the support frame 2 can be movably installed on the mounting seat 1 up and down, and a first limiting assembly 4 is provided between the support frame 2 and the mounting seat 1, and the first limiting assembly 4 is used to position the support frame 2 on the mounting seat 1 when the support frame 2 is located at multiple different positions in the up and down directions; the headrest 3 can be movably installed on the support frame 2 forward and backward, and a second limiting assembly 5 is provided between the headrest 3 and the support frame 2, and the second limiting assembly 5 is used to position the headrest 3 on the support frame 2 when the headrest 3 is located at multiple different positions in the forward and backward directions.

[0048] In the technical solution of the present invention, in order to meet the sitting comfort requirements of different groups of people after adjusting the seat 1000, an adjustable headrest assembly 100 is proposed. The headrest assembly 100 is used to adjust the position of the headrest 3 in the vertical direction and the front-to-back direction, thereby meeting the needs of different groups of people and having a large degree of adjustment freedom and greater applicability. Specifically, the headrest 3 can be mounted on the support frame 2 in a forward and backward manner, and the position of the headrest 3 in the front-to-back direction is positioned by the second limiting assembly 5 to provide forward support for the head. On this basis, the support frame 2 can be mounted on the mounting seat 1 in a forward and backward manner. Similarly, the first limiting assembly 4 is provided between the support frame 2 and the mounting seat 1 to position the support frame 2 and the headrest 3 on the support frame 2 in the vertical direction by the first limiting assembly 4 to provide support adapted to the height of the head. The overall structure is mounted on the seat back 300 through the mounting seat 1. The structure is simple, easy to use, and effective.

[0049] Specifically, see Appendix Figure 5 To the attached Figure 7 The first limiting assembly 4 includes a plurality of first limiting portions provided on one of the mounting base 1 and the support frame 2, and a first limiting member 42 provided on the other of the mounting base 1 and the support frame 2. The plurality of first limiting portions are spaced apart in the vertical direction, and the first limiting member 42 is movable so that the first limiting member 42 has a limiting position in which it engages with the first limiting portion and a movable position in which it disengages from the first limiting portion. The structural form in which the plurality of first limiting portions correspond to the first limiting member 42 is a multi-level adjustment form. Compared with stepless adjustment, multi-level adjustment has a lower degree of freedom but a higher degree of stability. That is, the first limiting member 42 in this application engages with the first limiting portion at a plurality of predetermined height levels, thereby providing stable support. The adjustment accuracy is determined by the number of height levels provided. That is, the more first limiting portions are provided, the closer the distance between two adjacent first limiting portions is. Consequently, the more height levels are provided, the higher the adjustment accuracy is. The specific number of first limiting portions is determined based on actual needs and is not limited herein.

[0050] Furthermore, the first limiting assembly 4 includes a first limiting rack 41 provided on one of the mounting seat 1 and the support frame 2. The first limiting rack 41 extends in the up-down direction. The first tooth groove 411 on the first limiting rack 41 forms the first limiting portion. The first limiting member 42 has a limiting position extending into the first tooth groove 411 and a movable position disengaging from the first tooth groove 411. The specific setting form of the first limiting portion is not limited, and is mainly based on the actual cooperation and limiting with the first limiting member 42. In this embodiment, the first limiting rack 41 is provided, and the first limiting portion is formed by the first tooth groove 411 on the first limiting rack 41. In this way, the intervals between the multiple first limiting portions are uniform, and the first limiting rack 41 formed with the multiple first limiting portions has a simple structure, a mature design and manufacturing process, and is easy to produce. Correspondingly, the first limiting portion is set as the first tooth groove 411, and the first limiting member 42 is set as a structure that can extend into the first tooth groove 411, and the first limiting member 42 is limited by the two side groove walls of the first tooth groove 411, so as to realize the function of the first limiting component 4 to position the support frame 2 on the mounting seat 1 in the up and down directions.

[0051] In addition, a first elastic reset member 43 is further provided on the side of the first limiting member 42 facing away from the first tooth groove 411. The first elastic reset member 43 is used to reset the first limiting member 42 to the limiting position extending into the first tooth groove 411. The provision of the first elastic reset member 43 makes it possible to automatically reset the first limiting member 42 by the first elastic reset member 43 when adjusting the first limiting member 42 without applying additional force, thereby simplifying the operation. The first elastic reset member 43 can also maintain the first limiting member 42 in a state of extending into the first tooth groove 411, thereby maintaining the support frame 2 in a state of being positioned on the mounting seat 1, and improving the stability of the first limiting assembly 4.

[0052] In addition, the groove walls on both sides of the first tooth groove 411 are inclined to form a first guiding slope 411 a, so that when the support frame 2 moves up and down, the first limiting member 42 can move along the first guiding slope 411 a to escape from the first tooth groove 411. The first stop member 42 is movable in the direction relative to the first tooth groove 411, and the first stop member 42 can be extended into the first tooth groove 411 for limiting, and can be disengaged from the first tooth groove 411 for up and down movement adjustment. In this embodiment, the first stop member 42 is configured to be movable along the notch direction of the first tooth groove 411, that is, it can be disengaged from the first tooth groove 411 from the notch of the first tooth groove 411 to be adjusted up and down. On this basis, the groove walls on both sides of the first tooth groove 411 are further configured as the first guide inclined surfaces 411a, so that the first stop member 42 can be movably disengaged from the first tooth groove 411 along the first guide inclined surfaces 411a. With this configuration, there is no need to additionally provide a driving member to drive the first stop member 42 to move. When adjusting the support frame 2 up and down, force can be directly applied to the support frame 2. At this time, since the support frame 2 and the mounting seat 1 have a tendency to move relative to each other in the up and down directions, the first stop member 42 has a tendency to move relative to each other in the first The first limit member 42 is moved along the first guide slope 411a to compress the first elastic return member 43 in the direction of disengaging from the first tooth groove 411 until the first limit member 42 passes over the tooth portion on the first limit rack 41. At this time, the first limit member 42 continues to move relative to the first limit rack 41, and the first elastic return member 43 drives the first limit member 42 to extend into another first tooth groove 411. Subsequently, if the first limit member 42 continues to move relative to the first limit rack 41, the above action is repeated until the first limit member 42 no longer moves relative to the first limit rack 41, and the first elastic return member 43 can drive the first limit member 42 to extend into the current corresponding first tooth groove 411, thereby completing the positioning of the support frame 2 by the first limit assembly 4.

[0053] It can be understood that when the user's head rests on the headrest 3, the direction of the force applied to the headrest 3 is from front to back. Therefore, although the headrest 3 can move in the up and down directions under the up and down forces, the direction of the force applied by the user's head is the front and back direction. Therefore, the structural setting of the first limiting component 4 will not affect the normal support of the headrest 3 for the user's head, and facilitates the adjustment of the headrest 3 in the up and down directions.

[0054] In addition, two of the first limiting racks 41 are arranged at intervals in the front-to-back direction to form a sliding channel between the two first limiting racks 41. One of the mounting seat 1 and the support frame 2 is provided with the first limiting rack 41, and the other is slidably arranged in the above-mentioned sliding channel, so that the two first limiting racks 41 are used to guide the movement of the mounting seat 1 and the support frame 2 in the up and down directions, making the relative movement more stable.

[0055] In addition, see the attached Figure 5 , Attachment Figure 6 And attached Figure 8 A limiting structure is provided on one of the headrest 3 and the support frame 2, and a matching structure is provided on the other. The second limiting assembly 5 includes a plurality of second limiting portions provided on the limiting structure, and a second limiting member 52 provided on the matching structure. The plurality of second limiting portions are spaced apart in the front-to-back direction, and the second limiting member 52 is movably provided to have a limiting position that matches the second limiting portion and a movable position that disengages from the second limiting portion. The second limiting assembly 5 is provided in the same manner as the first limiting assembly 4, namely, a plurality of second limiting portions are spaced apart in the front-to-back direction, and the second limiting member 52 is provided at the same time. By virtue of the second limiting member 52 being able to move between the plurality of second limiting portions, the front-to-back position of the headrest 3 can be adjusted to meet functional requirements.

[0056] Specifically, the limiting structure includes a second limiting rack 51 extending in the front-to-back direction. A second tooth groove 511 on the second limiting rack 51 forms the second limiting portion. The second limiting member 52 has a limiting position in which it extends into the second tooth groove 511 and a movable position in which it is released from the second tooth groove 511. Similarly, the second limiting portion is configured as the second tooth groove 511 on the second limiting rack 51, which has the same structure and function as the first tooth groove 411 provided in the first limiting assembly 4, and will not be described in detail here.

[0057] In addition, a second elastic return member 53 is provided on a side of the second limit member 52 facing away from the second tooth groove 511. The second elastic return member 53 is used to return the second limit member 52 to the limit position extending into the second tooth groove 511. Similarly, the second limit member 52 is also elastically returned by the second elastic return member 53, achieving the same function as the first elastic return member 43 described above, simplifying the adjustment operation of the second limit member 52.

[0058] Furthermore, the side walls of the second tooth groove 511 have a second guide slope 511a formed on one side and a stop surface 511b formed on the other side. This allows the second stopper 52 to move along the second guide slope 511a to escape from the second tooth groove 511 when the headrest 3 moves forward. When the headrest 3 moves backward, the stop surface 511b stops the second stopper 52. It is understood that the second stopper assembly 5 is primarily used to position the headrest 3 in the fore-aft direction. If a rack structure identical to the first stopper assembly 4 were employed, when a user leans their head against the headrest 3, the force exerted by the headrest on the headrest 3 would drive the second stopper assembly 5 to adjust in the fore-aft direction, rendering the headrest 3 unable to support the user's head forward. Therefore, in this embodiment, the structure of the second stopper rack 51 is adjusted. Specifically, the side walls of the second tooth groove 511 on the second stopper rack 51 have a stop surface 511b formed on one side. This allows the user to position the headrest 3 in the fore-aft direction. When the head rests on the headrest 3 and a backward force is applied to the headrest 3, the second stopper 52 in the second stopper assembly 5 abuts against the stop surface 511b. Because the stop surface 511b has no bevel or has a small inclination angle, the second stopper 52 does not move along the stop surface 511b and does not escape from the second tooth groove 511. This allows the second stopper 52 and the second limit rack 51 to be positioned when the user's head rests on the headrest 3, thereby positioning the headrest 3 and preventing the headrest 3 from retreating backward under force, thereby providing support for the user's head and meeting functional requirements. Conversely, when the headrest 3 is adjusted forward, the second stopper 52 contacts the second guide slope 511a, allowing it to move along the second guide slope 511a and escape from the second tooth groove 511, passing over the teeth of the second limit rack 51, and switching between two adjacent second tooth grooves 511, thereby meeting the adjustment function.

[0059] Based on the above-mentioned stop surface 511b structure, it can be understood that in order to meet the support for the user's head, the stop surface 511b cooperates with the second limiting member 52 and also affects the second limiting member 52 crossing the stop surface 511b to adjust the headrest 3 backward. In order to avoid this problem and to ensure that the headrest 3 can still be simply adjusted backward on the basis of the stop surface 511b, in this embodiment, the second limiting assembly 5 also includes an adjusting member 54 movably arranged on the cooperating structure, and in the active stroke of the adjusting member 54, it has a function of cooperating with the second limiting member 52 to limit the second limiting member 52 to the adjustment position of the active position, and a disengagement position from the second limiting member 52. That is, by providing the additional adjusting member 54 to assist the second limiting member 52 in crossing the stop surface 511b, the rearward adjustment of the headrest 3 is achieved. Specifically, the adjusting member 54 can be movably provided, and has the adjusting position cooperating with the second limiting member 52 and the disengaging position disengaging from the second limiting member 52 in its movable stroke. When the adjusting member 54 is in the disengaging position, it does not affect the normal cooperation between the second limiting member 52 and the second limiting rack 51, that is, it does not affect the forward supporting function of the headrest 3 and the simple forward adjustment. When the adjusting member 54 is in the adjusting position, the adjusting member 54 cooperates with the second limiting member 52 to limit the second limiting member 52 to the movable position, that is, to limit the second limiting member 52 to the position disengaging from the second tooth groove 511. In this way, the second limiting member 52 can cross the stop surface 511b to achieve the rearward adjustment of the headrest 3, thereby meeting the structural and functional requirements.

[0060] The present application does not specifically limit the specific structure of the adjusting member 54. It is sufficient that the adjusting member 54 has the two movable positions described above and can cooperate with the second limiting member 52 at the adjustment position to assist the second limiting member 52 in crossing the stop surface 511b. In this embodiment, the second limiting member 52 can be movably arranged in the left-right direction on the matching structure, and the adjusting member 54 can be movably arranged in the front-back direction on the matching structure. The adjusting member 54 has an accommodating notch 541 on one side facing the second limiting member 52. The second limiting member 52 is placed in the accommodating notch 541 so that the second limiting member 52 is limited to the movable position. The second limiting member 52 is limited by the accommodating notch 541 on the adjusting member 54, which has a simple structure and is easy to release.

[0061] In addition, see the attached Figure 8 , Attachment Figure 10 And attached Figure 12The movement of the adjusting member 54 between the adjustment position and the disengagement position requires a driving structure to be provided. It is easy to think of providing an operating member on the outside of the headrest assembly 100 to drive the connection with the adjusting member 54. When the headrest 3 needs to be adjusted backward, the operating member is operated to adjust the adjusting member 54 to the adjustment position and cooperate with the second limiting member 52. However, such a setting requires additional operations, which is obviously cumbersome. Therefore, in this embodiment, the movement of the adjusting member 54 is linked to the front and rear adjustment of the headrest 3, so that the adjustment member 54 is automatically adjusted when the headrest 3 is adjusted, which simplifies the user operation and switches the stopping state of the second limiting member 52 and the stop portion without feeling. Specifically, a driving part 542 is provided on the adjusting member 54. The driving part 542 and the second limiting rack 51 are stacked up and down, so that when the headrest 3 moves relative to the support frame 2, the second limiting rack 51 frictionally drives the driving part 542 to move relative to the headrest 3, so that the adjusting member 54 moves forward and backward on the matching structure. That is, on the matching structure, the adjusting member 54 is arranged on one side of the second limiting member 52 in the front-to-back direction, and the adjusting member 54 can move in the front-to-back direction relative to the second limiting member 52. At the same time, the adjusting member 54 is arranged to be stacked up and down with the second limiting rack 51, so that the driving portion 542 on the adjusting member 54 contacts the second limiting rack 51, so that there is relative friction between them. In this way, when the headrest 3 is adjusted backward, the matching structure drives the second limiting member 52 to move toward the stop surface 511b. At this time, the adjusting member 54 on the matching structure is subjected to a reverse friction force, so that the adjusting member 54 moves relative to the matching structure, thereby approaching the second limiting member 52 and moving the second limiting member 5 2 is accommodated in the accommodating notch 541 formed on one side thereof, thereby limiting the second limiting member 52. At the same time, when it is necessary to release the limiting of the second limiting member 52, the headrest 3 only needs to be adjusted forward. At this time, the matching structure drives the second limiting member 52 to move in the direction of the second guide slope. Friction between the adjusting member 54 and the second limiting rack 51 causes the adjusting member 54 to move relative to the matching structure, thereby moving away from the second limiting member 52, causing the second limiting member 52 to disengage from the accommodating notch 541. Driven by the second elastic return member 53, the second limiting member 52 falls back into the second tooth groove 511 on the second limiting rack 51, thus satisfying the return operation of the second limiting member 52. The above arrangement is relatively ingenious, has a smooth operation, and is easy to use.Of course, it is understandable that the adjusting member 54 configured in this way does not have the function of driving the second limiting member 52 to the active position. Therefore, the adjusting member 54 needs to perform the limiting function of the second limiting member 52 only after the second limiting member 52 moves to the active position along the second guide slope 511a. In the user's operation steps, it is necessary to adjust the headrest 3 forward until the second limiting member 52 moves to the active position, and then adjust the headrest 3 backward until the second limiting member 52 is stuck in the accommodating notch 541 of the adjusting member 54 to complete the limiting of the second limiting member 52. This will inevitably make it difficult to distinguish whether the second limiting member 52 is active during operation. The movable position has an operational blind spot. To avoid this problem, in this embodiment, a maintaining portion 512 is provided at the end of the second limiting rack 51, and the distance between the maintaining portion 512 and the bottom of the tooth groove is not less than the distance between the tooth portion of the second limiting rack 51 and the bottom of the tooth groove. In this way, when the headrest 3 is adjusted forward to the maximum amplitude, the second limiting member 52 moves to the maintaining portion 512. At this time, the second limiting member 52 is maintained in the movable position, and then the headrest 3 is adjusted backward, and the second limiting member 52 is smoothly inserted into the accommodating notch 541 of the adjusting member 54. That is, by adopting the above structure, a fixed adjustment step is formed when the headrest 3 needs to be adjusted backward. That is, first adjust the headrest 3 forward to the maximum amplitude and then adjust it backward in the opposite direction. In this way, there is no need to distinguish whether the second limiting member 52 is in the active position, that is, when the headrest 3 is adjusted forward to the maximum amplitude, the second limiting member 52 must be in the active position, thereby eliminating the above-mentioned operation blind spot. At the same time, the length of the maintaining portion 512 in the front-to-back direction is adjusted and extended, and the distance between the adjusting member 54 and the second limiting member 52 is adjusted so that when the second limiting member 52 moves to the tooth portion of the second limiting rack 51, the headrest 3 is adjusted backward, and the second limiting member 52 will preferentially slide along the second guide inclined surface 511a toward the bottom of the second tooth groove 511. The second limiting member 52 moves forward and is unable to fit into the accommodating notch 541 on the adjacent adjusting member 54, that is, when the headrest 3 is not adjusted forward to the maximum extent, the adjusting member 54 cannot cooperate with the second limiting member 52. When the headrest 3 moves forward to the maximum extent, because the front-to-back length dimension of the maintaining portion 512 is larger than the tooth portion of the second limiting rack 51, after the second limiting member 52 is in the maintaining portion 512, the headrest 3 is adjusted backward. During the movement of the second limiting member 52 along the maintaining portion 512, it is inserted into the accommodating notch 541 of the adjusting member 54, completing the limiting of the second limiting member 52 by the adjusting member 54, so as to realize the backward adjustment of the headrest 3.

[0062] In summary, with such a configuration, the headrest 3 can be adjusted forward normally. When the headrest 3 needs to be adjusted backward, the headrest 3 is preferably adjusted forward to the maximum stroke, and then adjusted backward in the opposite direction until it is adjusted to the desired position, and then the headrest 3 is moved forward a short distance. The purpose of moving the headrest 3 forward a short distance is to make the second limiting member 52 disengage from the adjusting member 54, and be reset by the second elastic reset member 53 until the second limiting member 52 falls into the second tooth groove 511, thereby completing the adjustment of the headrest 3 in the front and rear directions.

[0063] In addition, to ensure the stability of the friction between the driving portion 542 and the second position-limiting rack 51, in this embodiment, an elastic abutting member 543 is further provided on the side of the driving portion 542 facing away from the second position-limiting rack 51. The elastic abutting member 543 is used to abut the driving portion 542 against the second position-limiting rack 51. In addition, similar to the configuration of the first position-limiting rack 41, two second position-limiting racks 51 are provided spaced apart in the vertical direction. The mating structure moves between the two second position-limiting racks 51, so that the second position-limiting member 52 simultaneously cooperates with the two second position-limiting racks 51. At the same time, two adjusting members 54 are provided, each abutting against one of the second position-limiting racks 51 in the vertical direction. The elastic abutting member 543 is placed between the two adjusting members 54 to simultaneously apply a holding force to the two adjusting members 54 against the second position-limiting rack 51, ensuring the normal function of both.

[0064] See also Figure 1 The present application also proposes a chair 1000, wherein the chair 1000 includes a seat 200, a seat back 300 and a headrest assembly 100, wherein the seat back 300 is mounted on the seat 200, and the headrest assembly 100 is mounted on the seat back 300. The specific structure of the headrest assembly 100 refers to the above embodiment. Since the chair 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0065] The present application also proposes a terminal device, which includes the seat 1000. The specific structure of the seat 1000 refers to the above embodiment. Since the terminal device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0066] It is understood that the terminal device includes an audio-visual cabin or a vehicle cabin, or other application scenarios in which the seat 1000 can be applied. Furthermore, the cabin of the terminal device may include audio-visual equipment, or only speakers, or other equipment and structures adapted to the functions of the terminal device, without specific limitation herein. In this embodiment, the terminal device primarily includes the audio-visual cabin, and the cabin of the audio-visual cabin includes at least the speaker device to provide the user with a more immersive vocal experience.

[0067] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A headrest assembly, characterized in that: include: A mounting base, used for mounting on a seat back; A support frame is movably mounted on the mounting seat in an up-and-down direction, and a first position-limiting component is provided between the support frame and the mounting seat, wherein the first position-limiting component is used to position the support frame on the mounting seat when the support frame is located at a plurality of different positions in the up-and-down direction; and A headrest can be movably installed on the support frame forward and backward, and a second limiting component is arranged between the headrest and the support frame, and the second limiting component is used to position the headrest on the support frame when the headrest is located at a plurality of different positions in the forward and backward directions.

2. The headrest assembly according to claim 1, characterized in that: The first limiting assembly includes a plurality of first limiting portions respectively arranged on one of the mounting seat and the supporting frame, and a first limiting piece arranged on the other of the mounting seat and the supporting frame. The plurality of first limiting portions are arranged at intervals along the up and down directions, and the first limiting piece can be movably arranged so that the first limiting piece has a limiting position cooperating with the first limiting portion and a movable position disengaged from the first limiting portion.

3. The headrest assembly according to claim 2, characterized in that: The first limiting assembly includes a first limiting rack arranged on one of the mounting seat and the supporting frame, the first limiting rack extends in the up and down directions, the first tooth groove on the first limiting rack forms the first limiting portion, and the first limiting member has a limiting position extending into the first tooth groove and a movable position out of the first tooth groove.

4. The headrest assembly according to claim 3, characterized in that: A first elastic reset member is further provided on a side of the first limit member facing away from the first tooth groove, and the first elastic reset member is used to reset the first limit member to the limit position extending into the first tooth groove.

5. The headrest assembly according to claim 4, characterized in that: The groove walls on both sides of the first tooth groove are inclined to form a first guiding inclined surface, so that when the support frame moves up and down, the first limiting member can move along the first guiding inclined surface to escape from the first tooth groove.

6. The headrest assembly according to claim 1, wherein: A limiting structure is provided on one of the headrest and the support frame, and a matching structure is provided on the other of them. The second limiting assembly includes a plurality of second limiting parts provided on the limiting structure, and a second limiting member provided on the matching structure. The plurality of second limiting parts are arranged at intervals along the front-to-back direction, and the second limiting member can be movably provided to have a limiting position matching the second limiting part and a movable position disengaged from the second limiting part.

7. The headrest assembly according to claim 6, characterized in that: The limiting structure includes a second limiting rack, which is extended in the front-to-back direction. The second tooth groove on the second limiting rack forms the second limiting portion. The second limiting member has a limiting position extending into the second tooth groove and an active position that escapes from the second tooth groove.

8. The headrest assembly according to claim 7, characterized in that: A second elastic reset member is further provided on a side of the second limit member facing away from the second tooth groove, and the second elastic reset member is used for resetting the second limit member to the limit position extending into the second tooth groove.

9. The headrest assembly according to claim 8, characterized in that: A second guiding slope is formed on one side of the groove walls on both sides of the second tooth groove, and a stop surface is formed on the other side, so that when the headrest moves forward, the second limiting member can move along the second guiding slope to escape from the second tooth groove, and when the headrest moves backward, the stop surface stops the second limiting member.

10. The headrest assembly according to claim 9, wherein: The second limiting component also includes an adjusting member movably arranged on the matching structure, and in the movable stroke of the adjusting member, there is an adjusting position that cooperates with the second limiting member to limit the second limiting member to the movable position, and a disengaged position that disengages from the second limiting member.

11. The headrest assembly according to claim 10, characterized in that: The second position-limiting member can be movably arranged in the matching structure along the left-right direction, and the adjusting member can be movably arranged in the matching structure along the front-back direction. The adjusting member is provided with an accommodating notch on one side facing the second position-limiting member, and the second position-limiting member is inserted into the accommodating notch so that the second position-limiting member is limited to the movable position.

12. The headrest assembly according to claim 11, characterized in that: The adjusting member is provided with a driving part, and the driving part and the second limiting rack are stacked up and down, so that when the headrest moves relative to the support frame, the second limiting rack frictionally drives the driving part to move relative to the headrest, so that the adjusting member moves forward and backward on the matching structure.

13. The headrest assembly according to claim 12, wherein: An elastic abutment is further provided on a side of the driving portion facing away from the second position-limiting rack, and the elastic abutment is used to abut the driving portion against the second position-limiting rack.

14. A seat, characterized in that: include: Chair seat; A seat back, mounted on the seat; as well as, A headrest assembly, which is a headrest assembly as claimed in any one of claims 1 to 13.

15. A terminal device, characterized in that: Comprising the seat as claimed in claim 14.

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