Adjustable headrest for seat and seat

Abstract

The utility model discloses an adjustable headrest for a seat and the seat, and belongs to the technical field of seats, and the adjustable headrest comprises a mounting frame, a headrest body and a headrest body, the driving mechanism is arranged on the mounting frame; the headrest body is arranged at the output end of the driving mechanism, and the headrest body is used for supporting the head and neck of a user; the driving mechanism is used for driving the headrest body to reciprocate in the set direction. The headrest body can be driven to move through the arranged driving mechanism, position adjustment of the headrest body is achieved, a user can conveniently adjust the headrest body to an expected position through the driving mechanism according to needs of the user, operation convenience is improved, and the control unit and the first pressure sensor are arranged, so that the user can conveniently adjust the headrest body to the expected position. The driving mechanism can be controlled to drive the headrest body according to the supporting force needed by the user to achieve automatic following and supporting of the head and the neck of the user.

Description

Technical Field

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

[0002] In order to improve user comfort, headrests are installed on the back of the seat in the related art. A common solution is to fix the headrest on the back of the seat. Since the position of the headrest cannot be adjusted, it is difficult for users to find a more comfortable posture when using such seats. There are also some solutions in which the headrest can be adjusted relative to the seat, but they are generally set to manual gear adjustment. They have multiple gears and require multiple manual adjustments, which is less convenient to use. In addition, since the position of the headrest in each gear is fixed, the position of the headrest in two adjacent gears will inevitably be separated by a certain distance, which makes it difficult to adjust the headrest to the best state for supporting the head and neck. Utility Model Content

[0003] The utility model aims to provide an adjustable headrest for a seat and a seat, which can facilitate a user to adjust the position of the headrest according to his / her own needs.

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

[0005] An adjustable headrest for a seat, the adjustable headrest comprising:

[0006] A mounting frame, which is used to be mounted on the backrest of the seat;

[0007] a driving mechanism, which is disposed on the mounting frame; and

[0008] A headrest body, which is arranged at the output end of the driving mechanism, and is used to support the user's head and neck;

[0009] Wherein, the driving mechanism is used to drive the headrest body to reciprocate along a set direction.

[0010] Preferably, the adjustable headrest further comprises a control unit, which is electrically connected to the driving mechanism and is used to control the operation of the driving mechanism;

[0011] The adjustable headrest further comprises a first pressure sensor disposed on the headrest body, and the control unit is electrically connected to the first pressure sensor, so that when the first pressure value of the headrest body obtained by the first pressure sensor does not meet the set pressure value, the control unit controls the driving mechanism to drive the movement of the headrest body until the first pressure value meets the set pressure value;

[0012] And / or, the adjustable headrest further includes a hand controller, and the hand controller is electrically connected to the control unit so that the driving mechanism can be controlled to work through the hand controller.

[0013] Preferably, the adjustable headrest also includes a second pressure sensor electrically connected to the control unit, the second pressure sensor is used to be arranged on the seat cushion or seat surface of the seat, the control unit obtains a second pressure value exerted on the seat surface or seat cushion through the second pressure sensor, the control unit is provided with a pressure threshold, and the first pressure value is collected when the second pressure value reaches the pressure threshold.

[0014] Preferably, the driving mechanism comprises a driving motor and a screw-nut transmission mechanism, and the screw-nut transmission mechanism comprises:

[0015] A transmission screw rod, which is connected to the output shaft of the driving motor and is driven to rotate by the driving motor;

[0016] A transmission nut, which is threadedly coupled with the transmission screw; and

[0017] A connecting member, which is fixedly connected to the transmission nut;

[0018] Wherein, the headrest body is arranged on the connecting member, and the adjustable headrest also includes a limiting shell fixedly arranged on the mounting frame, the limiting shell is sleeved on the outside of the connecting member and the two are slidably matched along the set direction.

[0019] Preferably, the driving motor is arranged perpendicular to the set direction, and the adjustable headrest also includes a driving bevel gear and a transmission bevel gear that mesh with each other for transmission, the driving bevel gear is fixedly arranged on the output shaft of the driving motor, and the transmission bevel gear is fixedly arranged on the transmission screw.

[0020] Preferably, the mounting frame comprises a connecting frame for mounting with the backrest of the seat and a mounting shell fixedly arranged on the connecting frame, the mounting shell is formed with a mounting cavity with an opening, the driving motor is positioned in the mounting cavity, and the transmission screw extends out of the mounting cavity from the opening;

[0021] The adjustable headrest also includes a transfer shell fixedly arranged at the open end of the installation cavity, the transfer shell is sleeved outside the limiting shell and the two are fixedly connected;

[0022] The adjustable headrest also includes a circuit board fixedly mounted on the adapter housing, and the circuit board is electrically connected to the drive motor located in the mounting cavity through the opening to transmit a control signal to the drive motor. Preferably, the headrest body includes a main frame, and docking holes are formed on both sides of the main frame, and the connecting member includes a connecting sleeve and a connecting bracket, and the connecting sleeve is fixedly mounted outside the transmission nut, and the connecting bracket includes two arc-shaped connecting rods extending from the ends of the connecting sleeve to the two sides of the main frame, and the ends of the connecting rods are formed with plugs, and the connecting member is connected to the headrest body through the plugs inserted into the docking holes.

[0023] In addition, to achieve the above purpose, the utility model also adopts the following technical solutions:

[0024] A seat, comprising a seat back, further comprising an adjustable headrest as described in any one of the above technical solutions, wherein the adjustable headrest is arranged on the seat back through the mounting frame.

[0025] Preferably, the mounting frame is slidably disposed on the chair back, and the mounting frame has a first stroke for sliding along a predetermined direction and a second stroke for sliding in the opposite direction to the predetermined direction;

[0026] The mounting frame includes a connecting section in an elongated strip shape extending in a predetermined direction, the connecting section is formed with a long hole extending in the length direction thereof, and a side wall of one side of the long hole is provided with a plurality of slots distributed in the length direction thereof, the seat further includes:

[0027] A fixed block, which is fixedly arranged on the chair back;

[0028] A cover plate, which is detachably connected to the fixing block, and the cover plate covers the fixing block to form an assembly cavity therebetween;

[0029] A clamping member is movably disposed in the assembly cavity, and the clamping member is formed with a claw capable of moving in and out of the assembly cavity, and the claw can engage with and disengage from the clamping slot; and,

[0030] An elastic member, which is disposed in the assembly cavity and applies pressure to the clamping member so that the clamping claw has a tendency to clamp into the clamping slot;

[0031] Wherein, the inner wall of the assembly cavity is formed with a blocking portion, and the clamp is formed with a first pressure-bearing portion adapted to the blocking portion;

[0032] The other side wall of the long hole is formed with an unlocking portion and a locking portion, and the clamp is formed with a second pressure-receiving portion adapted to the unlocking portion and the locking portion;

[0033] The locking portion is used to apply pressure to the second pressure-bearing portion at the end point of the first stroke and drive the clamping member to move until the first pressure-bearing portion abuts against the blocking portion, so that the clamping claw can remain separated from the clamping slot in the second stroke;

[0034] The unlocking portion is used to apply pressure to the second pressed portion at the end point of the second stroke and drive the clamping member to move until the first pressed portion is separated from the blocking portion, so that the clamping claw can be clamped into the clamping slot under the action of the elastic member in the first stroke.

[0035] Preferably, the first stroke is an ascending stroke of the mounting frame relative to the seat back, and the second stroke is a descending stroke of the mounting frame relative to the seat back;

[0036] The blocking portion is formed on the upper inner wall of the assembly cavity, the other side wall of the long hole is formed with a groove extending along its length direction, the unlocking portion is formed on the upper inner wall of the groove, and the locking portion is formed on the lower inner wall of the groove.

[0037] Preferably, both the fixing block and the cover plate are provided with assembly grooves, the clamp is provided with an assembly shaft extending into the assembly groove, and the assembly shaft is configured to be movable along the predetermined direction and rotatable around its own axis in the assembly groove.

[0038] Preferably, the fixed block is formed with an assembly block along its middle portion, the assembly cavity is formed between the assembly block and the cover plate, the portion of the fixed block located outside the assembly block cooperates with the cover plate to form a limiting slide groove, and the portion of the connecting section located on one side of the long hole is slidably arranged in the limiting slide groove.

[0039] Preferably, the top wall and the bottom wall of the long hole respectively cooperate with the top end and the bottom end of the assembly block to limit the distances of the first stroke and the second stroke.

[0040] The adjustable headrest also includes a hand controller. Compared with the prior art, the beneficial effects of the utility model are:

[0041] By setting up a driving mechanism, the headrest body can be driven to move, thereby achieving position adjustment of the headrest body, which is convenient for the user to adjust the headrest body to the expected position through the driving mechanism according to their own needs, thereby improving the convenience of operation; further, by setting up a control unit and a first pressure sensor, the driving mechanism can be controlled to drive the headrest body according to the support force required by the user to achieve automatic following support for the user's head and neck. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of the structure of an adjustable headrest for a seat provided in an embodiment of the present application;

[0043] Figure 2 An exploded view of an adjustable headrest;

[0044] Figure 3 Schematic diagram of the structure of the drive mechanism and the headrest body Figure 1 ;

[0045] Figure 4 Schematic diagram of the structure of the drive mechanism and the headrest body Figure 2 ;

[0046] Figure 5 It is a schematic diagram of the assembly of the limiting housing and the connecting member;

[0047] Figure 6 It is an exploded view of the limit housing and the transfer housing;

[0048] Figure 7 An exploded view of the installation housing and the adapter housing;

[0049] Figure 8 A schematic diagram of the structure for installing the adjustable headrest on the seat back;

[0050] Fig. 9 This is an exploded view of the connecting frame and the chair back;

[0051] Fig.10 It is a schematic diagram of the assembly of the fixing seat, the cover plate, the clamping member and the elastic member;

[0052] Fig.11 The exploded view of the fixing seat, cover plate, clamp and elastic member;

[0053] Fig.12 Further exploded views of the fixing seat, cover plate, clamp and elastic member;

[0054] Fig.13 A partial diagram of the connecting frame at a certain position during the upward movement of the seat back Figure 1 ;

[0055] Fig.14 A partial diagram of the connecting frame at a certain position during the upward movement of the seat back Figure 2 ;

[0056] Fig.15 It is a partial schematic diagram of the connecting frame moving upward until the locking portion contacts the second pressure-bearing portion;

[0057] Fig.16 It is a partial schematic diagram of the connecting frame being at the highest position relative to the seat back (the end point of the first stroke);

[0058] Fig.17 It is a partial schematic diagram of the connecting frame moving downward until the unlocking portion contacts the second pressed portion;

[0059] Fig.18 It is a partial schematic diagram showing that the connecting frame is at the lowest position relative to the seat back (the end point of the second stroke).

[0060] Among them, 1. mounting frame; 10. connecting frame; 100. connecting section; 101. long hole; 102. slot; 103. groove; 1030. unlocking part; 1031. locking part; 11. mounting shell; 110. first half shell; 111. second half shell; 112. open mouth; 113. plug plate; 2. driving motor; 20. driving bevel gear; 3. transmission screw; 30. transmission bevel gear; 4. transmission nut; 5. connecting member; 50. connecting sleeve; 500. slider; 501. bump; 51. connecting rod; 510. plug column ; 6. limit housing; 60. slide groove; 61. limit block; 62. first connecting hole; 7. adapter housing; 70. slot; 71. circuit board; 72. second connecting hole; 8. headrest body; 80. main frame; 81. docking hole; 9. backrest; 90. fixing block; 900. assembly block; 91. cover plate; 92. clamp; 920. claw; 921. first pressure-bearing part; 922. second pressure-bearing part; 923. assembly shaft; 93. assembly cavity; 930. blocking part; 931. assembly groove; 94. elastic member; 95. limit slide groove. DETAILED DESCRIPTION

[0061] 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.

[0062] This embodiment provides an adjustable headrest for a seat, such as Figure 1 and Figure 2 As shown in the figure, the adjustable headrest includes a mounting frame 1, a driving mechanism and a headrest body 8. The mounting frame 1 is used to be mounted on the seat back 9 of the seat, the driving mechanism is arranged on the mounting frame 1, the headrest body 8 is arranged at the output end of the driving mechanism, and the headrest body 8 is used to support the user's head and neck. The driving mechanism is used to drive the headrest body 8 to reciprocate along a set direction.

[0063] By providing a driving mechanism, the headrest body 8 can be driven to move, thereby achieving position adjustment of the headrest body 8, which is convenient for the user to adjust the headrest body 8 to a desired position through the driving mechanism according to their own needs, thereby improving operational convenience.

[0064] The driving mechanism in this embodiment includes a driving motor 2 and a screw-nut transmission mechanism. The driving motor 2 is connected to the headrest body 8 through the screw-nut transmission mechanism and is used to drive the headrest body 8 to move back and forth along a set direction. In addition, by using the screw-nut transmission mechanism to drive the headrest body 8 to move, the moving distance of the headrest body 8 can be controlled by accurately controlling the number of rotations of the driving motor 2, so that the headrest body 8 can stay at any position on its moving stroke. While using the screw-nut transmission mechanism to achieve torque transmission, its self-locking ability can also be used to ensure that the headrest body 8 can remain stationary after reaching the expected position.

[0065] To further realize automatic adjustment of the position of the headrest body 8, the adjustable headrest provided in this embodiment further includes a control unit, which is electrically connected to the drive mechanism and used to control the operation of the drive mechanism. Specifically, the control unit is electrically connected to the drive motor 2 to realize the transmission of control signals.

[0066] In an optional control scheme, the adjustable headrest also includes a hand controller, which is electrically connected to the control unit, and the user can operate the hand controller to control the operation of the drive mechanism. For example, the "forward" and "backward" buttons are directly marked on the hand controller. After the user presses the "forward" button, the drive motor 2 is controlled to rotate forward, and the corresponding drive headrest body 8 moves forward along the set direction (that is, moves in the direction of the face of the user sitting on the seat); after the user presses the "backward" button, the drive motor 2 is controlled to reverse, and the corresponding drive headrest body 8 moves backward along the set direction. This scheme is a user manual operation control scheme.

[0067] Alternatively, the adjustable headrest further comprises a first pressure sensor, which is arranged on the headrest body 8, and the force exerted by the user on the headrest body 8 can be detected by the first pressure sensor. The control unit is electrically connected to the first pressure sensor and obtains the first pressure value exerted on the headrest body 8 through the first pressure sensor, and the control unit can control the driving mechanism to work according to the first pressure value after being triggered, so that the headrest body 8 can apply pressure to the user's head and neck with the set pressure value. Specifically, a preset pressure value can be set and stored in the control unit in advance (it can be set at the factory, or it can be manually input by the user according to his own preference; the preset pressure value can be a fixed value, or it can be a plurality of different range values ​​distributed in gears), when the first pressure value collected by the first pressure sensor is less than the preset pressure value, the control unit will automatically control the driving motor 2 to rotate forward through the driving mechanism, so that the headrest body 8 moves forward, and the pressure applied to the user's head and neck is increased, until the first pressure value collected by the first pressure sensor reaches the preset pressure value, and the control unit controls the driving motor 2 to stop working, thereby realizing the function of the headrest body 8 automatically following and supporting the user's head and neck according to the support strength required by the user. This solution is an automatic control solution of the control unit.

[0068] Furthermore, the headrest body 8 also includes a second pressure sensor electrically connected to the control unit, the second pressure sensor is used to be arranged on the seat cushion or seat surface of the seat, the control unit is electrically connected to the second pressure sensor and obtains the second pressure value of the seat cushion through the second pressure sensor. The second pressure sensor can be used to determine whether a user is sitting on the seat cushion. It is a prior art to arrange a pressure sensor on the seat cushion or seat surface of the seat to determine whether a user is sitting on the seat cushion, which will not be described in detail here.

[0069] The control unit is provided with a pressure threshold, and the first pressure value is collected when the second pressure value reaches the pressure threshold. That is, when the control unit determines that a user is sitting on the seat cushion according to the second pressure value detected by the second pressure sensor, the control unit will be triggered to receive the first pressure value collected by the first pressure sensor, and compare it with the set pressure value, and then execute the above-mentioned automatic control scheme, that is, the control unit will control the drive motor 2 to work according to the first pressure value, and realize the automatic support of the headrest body 8 for the user's head and neck until the first pressure value meets the set pressure value.

[0070] In other optional implementations, the triggering of the control unit can also be achieved through other solutions. For example, the aforementioned hand controller can be set at the same time, and an "automatic neck tracking" button can be directly set on the hand controller. After the user presses the "automatic neck tracking" button, the control unit will be triggered, and then the control unit will execute the automatic control solution, that is, the control unit will control the drive motor 2 to work according to the first pressure value, so as to realize the automatic support of the headrest body 8 for the user's head and neck.

[0071] The above two control schemes for the driving motor 2 can be applied to the seat by selecting one of them, or both of them can be applied to the seat.

[0072] In other embodiments, a set pressure value associated with the first pressure value and a pressure threshold associated with the second pressure value may be input into the control unit through a hand controller.

[0073] The screw-nut transmission mechanism in this embodiment includes a transmission screw 3, a transmission nut 4 and a connecting member 5. The transmission screw 3 is connected to the output shaft of the driving motor 2 and is driven by the driving motor 2 to rotate. The set direction described in this embodiment is also the axial direction of the transmission screw 3. The transmission nut 4 is threadedly matched with the transmission screw 3, and the connecting member 5 is fixedly connected to the transmission nut 4. That is, the connecting member 5 can reciprocate synchronously with the transmission nut 4. The headrest body 8 is arranged on the connecting member 5, so that the driving motor 2 can drive the transmission screw 3 to rotate when working, thereby driving the transmission nut 4 and the connecting member 5 fixedly connected to the transmission nut 4 to move, and driving the headrest body 8 to move through the connecting member 5.

[0074] Of course, in order to enable the transmission nut 4 to only reciprocate along the set direction and not to rotate with the transmission screw 3, the adjustable headrest provided in this embodiment further includes a limit housing 6 fixedly arranged on the mounting frame 1, and the limit housing 6 is sleeved on the outside of the connecting member 5 and the two are slidably matched along the set direction. That is, the connecting member 5 is limited by the limit housing 6, so that the connecting member 5 can only slide along the set direction and cannot rotate.

[0075] In other optional embodiments, a linear drive such as an electric push rod can also be selected as a driving mechanism, and the headrest body 8 can be directly pushed to move back and forth linearly through the linear drive. However, the design of the driving mechanism provided by this embodiment has the following advantages: since the headrest body 8 is driven to move by a screw nut transmission mechanism, the moving distance of the headrest body 8 can be controlled by accurately controlling the number of rotations of the driving motor 2, thereby improving the control accuracy of the moving distance of the headrest body 8, and the headrest body 8 can stay at any position on its moving stroke. In this way, the user can accurately adjust the headrest body 8 to the desired position according to his or her own needs.

[0076] like Figure 3 and Figure 4 As shown in Figure 3 The figure shows the state where the headrest body 8 is closest to the mounting frame 1 along the set direction. Figure 4 , the state in which the headrest body 8 is farthest from the mounting frame 1 along the set direction is shown. In addition, the drive motor 2 in this embodiment is arranged perpendicular to the set direction, and the adjustable headrest also includes an active bevel gear 20 and a transmission bevel gear 30 that mesh with each other for transmission. The active bevel gear 20 is fixedly arranged on the output shaft of the drive motor 2, and the transmission bevel gear 30 is fixedly arranged on the transmission screw 3. Through the above arrangement, the length direction of the drive motor 2 can be arranged perpendicular to the set direction, so that the occupied space of the drive motor 2 along the set direction can be reduced. It is easy to understand that reducing the occupied space of the drive motor 2 along the set direction can reduce the overall design size of the adjustable headrest along the set direction, which is more beautiful. On this basis, the drive motor 2 can also select a motor with slightly larger power to obtain greater power. Through the cooperation of the active bevel gear 20 and the transmission bevel gear 30, on the one hand, the transmission steering can be realized, and on the other hand, the transmission torque can be increased through the transmission ratio design.

[0077] As mentioned above, the limiting housing 6 in this embodiment is slidably matched with the connecting member 5. Specifically, Figure 5 As shown in FIG. 1 , in this embodiment, a slider 500 is formed on the connecting member 5, and a slide groove 60 is provided on the inner wall of the limiting housing 6. The connecting member 5 is slidably arranged in the slide groove 60 through the slider 500. Figure 6As shown in the figure, the inner wall of the limit housing 6 forms a limit block 61 at the end away from the drive motor 2, and the connecting member 5 forms a protrusion 501 at the end close to the drive motor 2. The limit block 61 cooperates with the protrusion 501 to limit the moving stroke of the connecting member 5.

[0078] Through the above structural design, the connecting member 5 can stably slide relative to the limiting housing 6. Figure 3 When the connecting member 5 is at the middle position, the connecting member 5 will interfere with the end of the transmission screw 3, thereby limiting the connecting member 5 from moving further toward the mounting frame 1; Figure 4 When the connecting member 5 is at the middle position, the protrusion 501 interferes with the limiting block 61, thereby limiting the connecting member 5 from moving further away from the mounting bracket 1.

[0079] like Figure 2 As shown in , in order to facilitate the assembly of the drive motor 2, the mounting frame 1 in this embodiment includes a connecting frame 10 and a mounting shell 11 fixedly arranged on the connecting frame 10, wherein the connecting frame 10 is used to be installed with the seat back 9 of the seat. The mounting shell 11 is formed with a mounting cavity having an opening 112, the drive motor 2 is positioned in the mounting cavity, the transmission screw 3 extends out of the mounting cavity from the opening 112, and the limiting shell 6 is fixed at the opening 112 of the mounting cavity. It is easy to understand that a limiting rib that matches the outer contour of the drive motor 2 can be formed on the inner wall of the mounting cavity, and the drive motor 2 is positioned by using the limiting rib. A groove 103 can be formed on the mounting frame 1, the mounting shell 11 is assembled in the groove 103, and then the mounting shell 11 is locked and fixed to the mounting frame 1 using screws.

[0080] Further, combined with Figure 2 , Figure 6 and Figure 7 As shown in , the adjustable headrest provided in this embodiment also includes a transfer shell 7 fixedly arranged at the opening 112 of the installation cavity, and the transfer shell 7 is sleeved outside the limiting shell 6 and the two are fixedly connected. That is, the limiting shell 6 is fixedly connected to the installation shell 11 through the transfer shell 7. Specifically, a first connecting hole 62 is provided on the bottom wall of the limiting shell 6, and a second connecting hole 72 is provided on the bottom wall of the transfer shell 7. The positions of the first connecting hole 62 and the second connecting hole 72 correspond to each other, and screws are used to pass through the first connecting hole 62 and the second connecting hole 72 to lock and fix the limiting shell 6 and the transfer shell 7. As mentioned above, the provided limiting shell 6 can prevent friction noise between the connecting member 5 and the limiting shell 6, and between the transfer shell 7 and the limiting shell 6.

[0081] In addition, in order to facilitate the control of the drive motor 2, the adjustable headrest provided in this embodiment also includes a circuit board 71, and the provision of the adapter housing 7 also facilitates the arrangement of the circuit board 71. Specifically, the circuit board 71 is fixedly provided on the adapter housing 7, and at the same time, the circuit board 71 can be electrically connected to the drive motor 2 located in the installation cavity through the opening 112 to transmit a control signal to the drive motor 2. The control of the drive motor 2 will be described in detail later.

[0082] like Figure 7 As shown in , the installation housing 11 in this embodiment includes a first half shell 110 and a second half shell 111 that are detachably connected. The first half shell 110 and the second half shell 111 are fixedly installed and form a mounting cavity therebetween. A slot 70 is formed on the adapter housing 7. The first half shell 110 and the second half shell 111 are formed with a plug-in board 113 that matches the slot 70. The adapter housing 7 is fixed to the installation housing 11 by inserting the plug-in board 113 into the slot 70. Of course, in other optional embodiments, the plug-in board 113 may be provided only on one of the first half shell 110 and the second half shell 111. The split design of the installation housing 11 into the first half shell 110 and the second half shell 111 facilitates the assembly of the installation housing 11 with the drive motor 2 and the adapter housing 7.

[0083] like Figure 2 As shown in , the headrest body 8 in this embodiment includes a main frame, and docking holes 81 are formed on both sides of the main frame respectively. The connecting member 5 includes a connecting sleeve 50 and a connecting bracket. The connecting sleeve 50 is fixedly sleeved outside the transmission nut 4. The connecting bracket includes two arc-shaped connecting rods 51 extending from the ends of the connecting sleeve 50 to the two sides of the main frame 80 respectively. The ends of the connecting rods 51 are formed with plug posts 510. The connecting member 5 is connected to the headrest body 8 by plugging the plug posts 510 into the docking holes 81. By designing the structure of the headrest body 8, the headrest body 8 is rotatably connected to the connecting bracket, so that the user can adjust the angle of the headrest body 8 relative to the seat back 9 according to their own needs. Due to the structural design of the connecting bracket, the connecting bracket can have a certain deformation ability, which facilitates the assembly operation of the plug posts 510 on the connecting bracket and the docking holes 81 on the headrest body 8. At the same time, under the deformation of the connecting bracket, the connecting bracket exerts an external supporting force on the main frame of the headrest body 8, and this force can make the headrest body 8 rotate relative to the connecting bracket only under the action of a certain external force. In this way, when the user needs to adjust the angle of the headrest body 8, he can apply force to the headrest body 8 to make it rotate, and there is no need to worry about the headrest body 8 shaking when leaning on it normally.

[0084] The connecting sleeve 50 and the limiting shell 6 in this embodiment are both roughly rectangular, and the connecting member 5 and the limiting shell 6 are both made of plastic material, wherein the limiting shell 6 is made of POM material, which has good wear resistance and self-lubricating properties, and can reduce friction and abnormal noise between components. The connecting sleeve 50 and the driving nut 4 can be assembled into one body by using a metal insert injection molding process. Alternatively, in an optional embodiment, the connecting member 5 can also be designed as a split shell structure, and after the driving nut 4 is set in the split shell structure, the split shell structure is fixedly installed using screws or tight-fitting pins, which can also achieve fixed installation of the driving nut 4 and the connecting member 5. The connecting bracket and the connecting sleeve 50 can be integrally formed by injection molding, or they can be designed as separate bodies and then fixedly installed in one body.

[0085] like Figure 8 As shown in , the adjustable headrest can be applied to a seat, and the adjustable headrest can be installed on the seat back 9 of the seat through the mounting frame 1. In some optional embodiments, the mounting frame 1 can be fixedly mounted on the seat back 9. However, in order to further improve the adaptability of the headrest to users of different body shapes, the mounting frame 1 is also designed in this embodiment to be able to rise and fall relative to the seat back 9, so that the user can adjust the height position of the headrest body 8 according to their own needs.

[0086] Specific, combined Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown in the figure, the mounting frame 1 in this embodiment is slidably arranged on the chair back 9, and the mounting frame 1 has a first stroke for sliding in a predetermined direction and a second stroke for sliding in the opposite direction to the predetermined direction. The first stroke in this embodiment refers to the ascending stroke of the mounting frame 1 relative to the chair back 9, and the second stroke refers to the descending stroke of the mounting frame 1 relative to the chair back 9.

[0087] The connecting frame 10 in the mounting frame 1 includes a connecting section 100 in a long strip shape and extending in a predetermined direction. The connecting section 100 is formed with a long hole 101 extending in the length direction thereof. A side wall of the long hole 101 is provided with a plurality of slots 102 distributed in the length direction thereof. The seat also includes a fixing block 90, a cover plate 91, a clamp 92 and an elastic member 94. The fixing block 90 is fixedly arranged on the chair back 9, the cover plate 91 is detachably connected to the fixing block 90, the cover plate 91 covers the fixing block 90 and forms an assembly cavity 93 therebetween. The clamp 92 and the elastic member 94 are both arranged in the elastic cavity, wherein the clamp 92 is movably arranged in the assembly cavity 93, and the clamp 92 is formed with a claw 920 that can move in and out of the assembly cavity 93, and the claw 920 can engage with and separate from the slot 102. The elastic member 94 applies pressure to the clamp 92 so that the claw 920 has a tendency to engage in the slot 102.

[0088] In this embodiment, a blocking portion 930 is formed on the inner wall of the assembly cavity 93, and the clamp 92 is formed with a first pressure-bearing portion 921 that is compatible with the blocking portion 930; an unlocking portion 1030 and a locking portion 1031 are formed on the other side wall of the long hole 101, and the clamp 92 is formed with a second pressure-bearing portion 922 that is compatible with the unlocking portion 1030 and the locking portion 1031.

[0089] Among them, the locking portion 1031 is used to apply pressure to the second pressure-bearing portion 922 at the end point of the first stroke and drive the card 92 to move to the first pressure-bearing portion 921 and abut against the blocking portion 930, so that the claw 920 can remain separated from the slot 102 in the second stroke; the unlocking portion 1030 is used to apply pressure to the second pressure-bearing portion 922 at the end point of the second stroke and drive the card 92 to move to the first pressure-bearing portion 921 and separate from the blocking portion 930, so that the claw 920 can be clamped into the slot 102 under the action of the elastic member 94 in the first stroke.

[0090] Taking the seat provided in this embodiment as an example, when the user needs to adjust the height position of the headrest body 8 upward, for example, at this time, the clamp 92 is as follows: Fig.13 In the situation shown in FIG. 1 , the connecting frame 10 is inserted into a slot 102, which can push the connecting frame 10 to slide upward relative to the chair back 9. At the moment when the connecting frame 10 slides, the inner wall of the slot 102 and the engaging portion of the elastic member 94 act, and the elastic member 94 is compressed. That is, the user's force is transmitted to the elastic member 94 through the inner wall of the slot 102 on the connecting frame 10, and the engaging member 92 is driven accordingly to move, so that the engaging portion is disengaged from the slot 102. At this time, the relative position of the engaging member 92 and the slot 102 is as shown in FIG. Fig.14 Continue to push the connecting frame 10 to slide until the headrest body 8 reaches the expected height position, so that the claw 920 on the clamping member 92 is clamped into the clamping groove 102 at the corresponding height, and the connecting frame 10 can be positioned relative to the seat back 9, so that the headrest body 8 is kept at the expected height position.

[0091] When the user needs to adjust the height of the headrest body 8 downward, the user can first push the connecting frame 10 upward to the end of the first stroke, such as Fig.15 and Fig.16 FIG. 1 shows a situation in which the locking portion 1031 contacts the second pressure-receiving portion 922 on the card 92 and further applies pressure to the second pressure-receiving portion 922. The locking portion 1031 applies pressure to the second pressure-receiving portion 922 on the card 92 to cause the card 92 to move until the card 92 moves to the point where the first pressure-receiving portion 921 on the card 92 is locked by the blocking portion 930. Fig.16 At this time, the connecting frame 10 is restricted by the structure on the fixing block 90 and cannot continue to slide up.

[0092] Then push the connecting frame 10 downward to the end of the second stroke, such as Fig.17 and Fig.18 FIG. 1 shows a situation in which the unlocking portion 1030 contacts the second pressure-receiving portion 922 on the card 92 and further applies pressure to the second pressure-receiving portion 922. The unlocking portion 1030 applies pressure to the card 92 to move the card 92 until the first pressure-receiving portion 921 on the card 92 is separated from the locking portion 1031, and the result is as shown in FIG. Fig.18 At this time, the connecting frame 10 is located at the lowest position relative to the chair back 9, and the connecting frame 10 is pushed upward to reach the expected height position.

[0093] As mentioned above, the first stroke in this embodiment is the ascending stroke of the mounting frame 1 relative to the chair back 9, and the second stroke is the descending stroke of the mounting frame 1 relative to the chair back 9. Accordingly, the blocking portion 930 in this embodiment is formed at the upper inner wall of the assembly cavity 93, and the other side wall of the long hole 101 is formed with a groove 103 extending along its length direction, the unlocking portion 1030 is formed on the upper inner wall of the groove 103, and the locking portion 1031 is formed on the lower inner wall of the groove 103. In other optional embodiments, the first stroke may also be the descending stroke of the mounting frame 1 relative to the chair back 9, and the second stroke may be the ascending stroke of the mounting frame 1 relative to the chair back 9. In this solution, the orientations of the aforementioned blocking portion 930, unlocking portion 1030 and locking portion 1031 need to be changed accordingly. For example, the blocking portion 930 is formed on the lower inner wall of the assembly cavity 93, the unlocking portion 1030 is formed on the lower inner wall of the groove 103, and the locking portion 1031 is formed on the upper inner wall of the groove 103. In addition, the tilting direction of the card slot 102 also needs to be changed to the opposite direction accordingly.

[0094] Combination Fig.12 As shown, in this embodiment, both the fixed block 90 and the cover plate 91 are provided with an assembly groove 931, and the clamp 92 is provided with an assembly shaft 923 extending into the assembly groove 931, and the assembly shaft 923 is configured to be movable in a predetermined direction and rotatable around its own axis and arranged in the assembly groove 931. Specifically, the assembly shaft 923 is a round shaft, and the assembly groove 931 is a long groove extending in a predetermined direction, and the length dimension of the assembly groove 931 is configured to be larger than the diameter dimension of the round shaft. Through the above configuration, the assembly shaft 923 can be moved in a predetermined direction and can be rotated around its own axis.

[0095] Combination Fig.11As shown, the fixed block 90 in this embodiment is formed with an assembly block 900 along the middle thereof, an assembly cavity 93 is formed between the assembly block 900 and the cover plate 91, the portion of the fixed block 90 located outside the assembly block 900 cooperates with the cover plate 91 to form a limiting slide groove 95, and the portion of the connecting section 100 located on one side of the long hole 101 is slidably arranged in the limiting slide groove 95. Through the above structural design, the fixed block 90 and the cover plate 91 can cooperate to limit the connection frame 10 in the front-to-back direction and the left-to-right direction, so that the connection frame 10 can stably slide along the predetermined direction. The cover plate 91 can be locked and fixed with the assembly block 900 by screws, and at the same time, the fixed block 90 can be locked and fixed with the chair back 9 by screws.

[0096] Further, combined with Fig.10 As shown, the top wall and bottom wall of the long hole 101 in this embodiment respectively cooperate with the top end and the bottom end of the assembly block 900 to limit the distance of the first stroke and the second stroke. That is, when the connecting frame 10 performs the first stroke relative to the chair back 9 and slides to the uppermost end, the bottom wall of the long hole 101 will abut against the bottom end of the assembly block 900 to play a limiting role; when the connecting frame 10 performs the second stroke relative to the chair back 9 and slides to the lowermost end, the top wall of the long hole 101 will abut against the top end of the assembly block 900 to play a limiting role.

[0097] It is easy to understand that in this embodiment, two groups of connecting sections 100 are provided on the connecting frame 10, and correspondingly, two groups of fixing blocks 90, two groups of cover plates 91, two groups of clamps 92 and two groups of elastic members 94 are provided on the chair back 9. It is easy to understand that in an optional embodiment, only one group of connecting sections 100 may be provided on the connecting frame 10, and correspondingly, one group of fixing blocks 90, cover plates 91, clamps 92 and elastic members 94 may be provided on the chair back 9.

[0098] 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. An adjustable headrest for a seat, characterized in that: The adjustable headrest comprises: A mounting frame, which is used to be mounted on the backrest of the seat; a driving mechanism, which is disposed on the mounting frame; and A headrest body, which is arranged at the output end of the driving mechanism, and is used to support the user's head and neck; Wherein, the driving mechanism is used to drive the headrest body to reciprocate along a set direction.

2. The adjustable headrest according to claim 1, characterized in that: The adjustable headrest also includes a control unit, which is electrically connected to the drive mechanism and is used to control the operation of the drive mechanism; The adjustable headrest further comprises a first pressure sensor disposed on the headrest body, and the control unit is electrically connected to the first pressure sensor, so that when the first pressure value of the headrest body obtained by the first pressure sensor does not meet the set pressure value, the control unit controls the driving mechanism to drive the movement of the headrest body until the first pressure value meets the set pressure value; And / or, the adjustable headrest further includes a hand controller, and the hand controller is electrically connected to the control unit so that the driving mechanism can be controlled to work through the hand controller.

3. The adjustable headrest according to claim 2, characterized in that: The adjustable headrest also includes a second pressure sensor electrically connected to the control unit, the second pressure sensor is used to be set on the seat cushion or seat surface of the seat, the control unit obtains a second pressure value exerted on the seat surface or seat cushion through the second pressure sensor, the control unit is provided with a pressure threshold, and the first pressure value is collected when the second pressure value reaches the pressure threshold.

4. The adjustable headrest according to any one of claims 1 to 3, characterized in that The driving mechanism comprises a driving motor and a screw-nut transmission mechanism, and the screw-nut transmission mechanism comprises: A transmission screw rod, which is connected to the output shaft of the driving motor and is driven to rotate by the driving motor; A transmission nut, which is threadedly coupled with the transmission screw; and A connecting member, which is fixedly connected to the transmission nut; Wherein, the headrest body is arranged on the connecting member, and the adjustable headrest also includes a limiting shell fixedly arranged on the mounting frame, the limiting shell is sleeved on the outside of the connecting member and the two are slidably matched along the set direction.

5. The adjustable headrest according to claim 4, characterized in that: The driving motor is arranged perpendicular to the set direction, and the adjustable headrest also includes a driving bevel gear and a transmission bevel gear that are meshed and transmitted with each other, the driving bevel gear is fixedly arranged on the output shaft of the driving motor, and the transmission bevel gear is fixedly arranged on the transmission screw.

6. The adjustable headrest according to claim 4, characterized in that: The mounting frame includes a connecting frame for mounting with the backrest of the seat and a mounting shell fixedly arranged on the connecting frame, the mounting shell is formed with a mounting cavity with an opening, the driving motor is positioned in the mounting cavity, and the transmission screw extends out of the mounting cavity from the opening; The adjustable headrest also includes a transfer shell fixedly arranged at the open end of the installation cavity, the transfer shell is sleeved outside the limiting shell and the two are fixedly connected; The adjustable headrest also includes a circuit board fixedly arranged on the adapter housing, and the circuit board is electrically connected to the drive motor located in the installation cavity through the opening to transmit a control signal to the drive motor.

7. The adjustable headrest according to claim 4, characterized in that: The headrest body includes a main frame, and docking holes are respectively formed on both sides of the main frame. The connecting component includes a connecting sleeve and a connecting bracket. The connecting sleeve is fixedly sleeved outside the transmission nut. The connecting bracket includes two arc-shaped connecting rods extending from the ends of the connecting sleeve to the two sides of the main frame respectively. Insert columns are formed at the ends of the connecting rods. The connecting component is inserted into the docking hole by the insert columns to be rotatably connected to the headrest body.

8. A seat, including a seat back, characterized in that: The seat further comprises an adjustable headrest according to any one of claims 1 to 7, wherein the adjustable headrest is disposed on the seat back via the mounting frame.

9. The seat according to claim 8, characterized in that The mounting frame is slidably disposed on the chair back, and the mounting frame has a first stroke for sliding along a predetermined direction and a second stroke for sliding in the opposite direction to the predetermined direction; The mounting frame includes a connecting section in an elongated strip shape extending in a predetermined direction, the connecting section is formed with a long hole extending in the length direction thereof, and a side wall of one side of the long hole is provided with a plurality of slots distributed in the length direction thereof, the seat further includes: A fixed block, which is fixedly arranged on the chair back; A cover plate, which is detachably connected to the fixing block, and the cover plate covers the fixing block to form an assembly cavity therebetween; A clamping member is movably disposed in the assembly cavity, and the clamping member is formed with a claw capable of moving in and out of the assembly cavity, and the claw can engage with and disengage from the clamping slot; and, An elastic member, which is disposed in the assembly cavity and applies pressure to the clamping member so that the clamping claw has a tendency to clamp into the clamping slot; Wherein, the inner wall of the assembly cavity is formed with a blocking portion, and the clamp is formed with a first pressure-bearing portion adapted to the blocking portion; The other side wall of the long hole is formed with an unlocking portion and a locking portion, and the clamp is formed with a second pressure-receiving portion adapted to the unlocking portion and the locking portion; The locking portion is used to apply pressure to the second pressure-bearing portion at the end point of the first stroke and drive the clamping member to move until the first pressure-bearing portion abuts against the blocking portion, so that the clamping claw can remain separated from the clamping slot in the second stroke; The unlocking portion is used to apply pressure to the second pressed portion at the end point of the second stroke and drive the clamping member to move until the first pressed portion is separated from the blocking portion, so that the clamping claw can be clamped into the clamping slot under the action of the elastic member in the first stroke.

10. The seat according to claim 9, characterized in that The first stroke is an ascending stroke of the mounting frame relative to the seat back, and the second stroke is a descending stroke of the mounting frame relative to the seat back; The blocking portion is formed on the upper inner wall of the assembly cavity, the other side wall of the long hole is formed with a groove extending along its length direction, the unlocking portion is formed on the upper inner wall of the groove, and the locking portion is formed on the lower inner wall of the groove.

11. The seat according to claim 9, characterized in that The fixing block and the cover plate are both provided with assembly grooves, the clamp is provided with an assembly shaft extending into the assembly groove, and the assembly shaft is configured to be movable along the predetermined direction and rotatable around its own axis in the assembly groove.

12. The seat according to claim 9, characterized in that The fixed block is formed with an assembly block along its middle, the assembly cavity is formed between the assembly block and the cover plate, the portion of the fixed block outside the assembly block cooperates with the cover plate to form a limiting slide groove, and the portion of the connecting section located on one side of the long hole is slidably arranged in the limiting slide groove.

13. The seat according to claim 12, characterized in that The top wall and the bottom wall of the long hole are matched with the top end and the bottom end of the assembly block respectively to limit the distance of the first stroke and the second stroke.

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