A chair back and seat

Abstract

The present application relates to the technical field of massage chair, and discloses a chair back and a chair. The chair back comprises a support, a driving element, a massage head and a guide rod. The support is provided with a guide rail, and the guide rail has an undulating abutting surface. The driving element is slidingly connected to the support. The driving element is drivingly connected to the massage head through the guide rod, one end of the guide rod is fixedly connected to the massage head, and the other end is abutted against the abutting surface. When the driving element is started, it can drive itself to move along a first direction relative to the support, and can drive the massage head to rotate through the guide rod. When the guide rod moves along the first direction following the driving element, it is abutted against the abutting surface and is lifted along a second direction. A single driving element can realize the functions of up-down movement, rotation and telescoping of the massage head. While the diversified massage functions are retained, the structure inside the chair back is more simple and compact, and the adaptability is stronger.

Description

Technical Field

[0001] This invention relates to the field of massage chair technology, specifically to a chair back and a chair seat. Background Technology

[0002] As living standards improve, people's functional needs for chairs are becoming increasingly diverse, with massage function being one of the growing demands. Users sit or lie on the chair, and massage components are installed inside the backrest. These components are then driven to move and massage the user. To enhance the massage effect, related technologies typically incorporate a transmission structure that allows the massage heads to extend, retract, and rotate. However, this diversification of functions leads to problems such as complex internal structures and high component costs in the chair backrest. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a chair back that has telescopic and rotating massage functions while effectively simplifying the internal structure.

[0004] This application also proposes a chair with the aforementioned backrest.

[0005] A chair back according to a first aspect embodiment of this application includes a support, a drive member, a massage head, and a guide rod. The support is provided with a guide rail extending along a first direction and having a support surface undulating along a second direction, the first direction and the second direction being perpendicular to each other. The drive member is slidably connected to the support. The drive member is drively connected to the massage head via the guide rod, and the drive member can drive the guide rod to rotate about its own axis. One end of the guide rod is fixedly connected to the massage head, and the other end abuts against the support surface. When the drive member is activated, it can drive itself to slide relative to the support along the first direction and drive the massage head to rotate via the guide rod. The support surface abuts against the guide rod, driving the massage head to rise and fall along the second direction.

[0006] The chair back according to the embodiments of this application has at least the following beneficial effects: by laying guide rails on the support, and the guide rails having undulating abutment surfaces, and then having the guide rod connected to the massage head abut against the guide rails, when the drive unit is activated, it can move itself relative to the support in a first direction, and can drive the massage head to rotate through the guide rod. Since the other end of the guide rod abuts against the undulating abutment surface, when the guide rod moves along the first direction with the drive unit, it is also abutted against by the abutment surface, thus rising and falling in a second direction. In this way, a single drive unit can realize the functions of up-and-down movement, rotation, and extension / retraction of the massage head, retaining diverse massage functions while making the internal structure of the chair back simpler, more compact, and more adaptable.

[0007] According to some embodiments of this application, the abutting surface has a first segment, and along the second direction, the distance between the first segment and the driving member is less than the distance between the remaining segments of the abutting surface and the driving member, and along the first direction, at least a portion of the first segment is located upstream of the abutting surface.

[0008] According to some embodiments of this application, the abutting surface has a second segment along the first direction, the second segment being located upstream of the first segment, and along the second direction, the distance between the second segment and the driving member is greater than the distance between the remaining segments of the abutting surface and the driving member.

[0009] According to some embodiments of this application, the abutment surface has a first transition section, the two ends of the first transition section are respectively connected to the first segment and the second segment, and the distance between the first transition section and the driving member gradually decreases from the second segment to the first segment.

[0010] According to some embodiments of this application, the abutment surface has a third segment and a second transition segment, the two ends of the second transition segment are respectively connected to the first segment and the third segment, along the first direction, the third segment is located downstream of the first segment, and the distance between the second transition segment and the driving member gradually increases from the first segment to the third segment.

[0011] According to some embodiments of this application, the first transition segment is inclined relative to the first segment and has a first slope, the second transition segment is inclined relative to the first segment and has a second slope, the first slope is greater than the second slope, and / or, along the first direction, the size of the first transition segment is smaller than the size of the second transition segment.

[0012] According to some embodiments of this application, the chair back includes a worm gear, a worm, a driving tooth, and a first driven tooth. The power end of the driving member is connected to the worm, the worm is connected to the worm gear via a transmission connection, the driving tooth is coaxially connected to the worm gear, the first driven tooth meshes with the driving tooth, and the guide rod is slidably disposed through the first driven tooth. The first driven tooth has a first abutment surface, and the guide rod has a second abutment surface. When the first driven tooth rotates, the first abutment surface abuts against the second abutment surface to drive the guide rod to rotate.

[0013] According to some embodiments of this application, the chair back includes a rack and a second driven tooth. The rack extends along the first direction, the second driven tooth meshes with the rack and is coaxially connected to the first driven tooth, and the guide rod is slidably passed through the second driven tooth. When the first driven tooth rotates, the second driven tooth rotates to move relative to the rack along the first direction.

[0014] According to some embodiments of this application, the diameter of the first driven tooth is greater than the diameter of the second driven tooth, and / or the diameter of the first driven tooth is greater than the diameter of the worm gear and the diameter of the driving tooth.

[0015] The seat according to a second aspect embodiment of this application includes the backrest as described in any one of the first aspect embodiments.

[0016] The chair according to the embodiments of this application has at least the following beneficial effects: by laying guide rails on the support, and the guide rails having undulating abutment surfaces, and then having the guide rod connected to the massage head abut against the guide rails, when the drive unit is activated, it can move itself relative to the support in a first direction, and can drive the massage head to rotate through the guide rod. Since the other end of the guide rod abuts against the undulating abutment surface, when the guide rod moves along the first direction with the drive unit, it is also abutted against by the abutment surface, thus rising and falling in a second direction. In this way, a single drive unit can realize the functions of up-and-down movement, rotation, and extension / retraction of the massage head, retaining diverse massage functions while making the internal structure of the chair back simpler and more compact, with stronger adaptability. More components can be placed inside the chair back to enhance the overall functionality of the chair.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a perspective view of a seat in one embodiment of this application; Figure 2 This is a first perspective view of the internal structure of the chair back in one embodiment of this application; Figure 3 This is a second perspective view of the internal structure of the chair back in one embodiment of this application; Figure 4 This is an exploded view of the internal structure of the chair back in one embodiment of this application; Figure 5 This is a side view of the internal structure of the chair back in one embodiment of this application; Figure 6 for Figure 5 Enlarged view of region A in the middle; Figure 7 This is a partial perspective view of the chair back in one embodiment of this application.

[0019] Reference numerals: Seat 100; Backrest 101; Bracket 201; Guide rail 202; Support surface 203; Massage head 204; Guide rod 205; Housing 206; Drive component 401; Worm gear 402; Worm 403; Driving gear 404; First driven gear 405; Rack 406; Heating module 407; Roller 408; First contact surface 409; Second contact surface 410; First section 501; Second section 502; First transition section 503; Third section 504; Second transition section 505; Second driven gear 601. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0024] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] refer to Figures 1 to 3 According to a first aspect embodiment of this application, the chair back 101 includes a support 201, a drive member 401, a massage head 204, and a guide rod 205. The support 201 is provided with a guide rail 202 extending along a first direction. The guide rail 202 has a support surface 203 undulating along a second direction, the first and second directions being perpendicular to each other. The drive member 401 is slidably connected to the support 201. The drive member 401 is driveably connected to the massage head 204 via the guide rod 205. The drive member 401 can drive the guide rod 205 to rotate around its own axis. One end of the guide rod 205 is fixedly connected to the massage head 204, and the other end abuts against the support surface 203. When the drive member 401 is activated, the drive member 401 can drive itself to slide relative to the support 201 along the first direction, and drive the massage head 204 to rotate via the guide rod 205. The support surface 203 abuts against the guide rod 205, driving the massage head 204 to rise and fall along the second direction. By laying a guide rail 202 on the support 201, and the guide rail 202 having an undulating support surface 203, and then having the guide rod 205 connected to the massage head 204 abut against the guide rail 202, when the drive unit 401 is activated, it can move itself relative to the support 201 in a first direction, and can drive the massage head 204 to rotate through the guide rod 205. Since the other end of the guide rod 205 abuts against the undulating support surface 203, when the guide rod 205 moves with the drive unit 401 in the first direction, it will be abutted by the support surface 203, thus moving up and down in a second direction. In this way, a single drive unit 401 can realize the functions of up and down movement, rotation, and extension and retraction of the massage head 204, while retaining diverse massage functions, and the internal structure of the chair back 101 is simpler, more compact, and more adaptable.

[0026] Furthermore, related technologies typically require multiple motors to separately realize the lifting and rotating of the massage head 204, as well as the movement of the massage assembly as a whole within the chair back 101. This application integrates a single motor structure, which can also achieve the above functions, effectively reducing costs.

[0027] It should be noted that, Figure 2 The internal structure of the chair back 101 shown is installed in Figure 1Inside the chair back 101 shown, the first direction is the height direction of the chair back 101, and the second direction is the thickness direction of the chair back 101. Therefore, the sliding of the drive component 401 along the first direction drives the massage head 204 to slide up and down along the chair back 101, thereby massaging different areas of the user's back. The massage head 204 and the guide rod 205 are pushed up and down along the second direction by the abutment surface 203, which is to massage or press different areas of the user's back. The rotation of the massage head 204 is to knead and massage the user's back. The combination of the three can provide users with a multi-functional experience, and the structure is simple and highly integrated. In addition to the mounting bracket 201, there is more space inside the chair back 101 to accommodate other components, or to meet the lightweight requirements of the chair back 101.

[0028] It should be noted that, Figure 2 The diagram shows the state when the massage head 204 is positioned relatively high. At this time, the guide rod 205 abuts against the second section 502, so the height of the massage head 204 is relatively small. Figure 3 The diagram shows the state of the massage head 204 after it has moved downwards. At this time, the guide rod 205 abuts against the first segment 501, and the first segment 501 pushes the guide rod 205 upwards, thereby causing the massage head 204 to move downwards. Figure 3 As shown, it extends.

[0029] It should be noted that the reference Figure 3 , Figures 5 to 7 In some embodiments, the chair back 101 includes a roller 408, which is disposed at one end of the guide rod 205 facing the abutment surface 203. The roller 408 is used to abut against the abutment surface 203. The roller 408 can reduce the friction between the guide rod 205 and the abutment surface 203 during the sliding of the guide rod 205 in the first direction, improve the service life of the component, and reduce noise. When the guide rod 205 passes through the undulating position of the abutment surface 203, such as the connection between the second segment 502 and the first transition segment 503, or the connection between the first transition segment 503 and the first segment 501, the roller 408 can further reduce friction to make the sliding process of the guide rod 205 smoother, and the abutment surface 203 can also better push the guide rod 205 to extend in the second direction.

[0030] It should be noted that the reference Figure 4 In some embodiments, the chair back 101 also includes a heating module 407, which is disposed on the side of the massage head 204 facing the drive member 401. This further enhances the versatility of the massage functions, enabling the massage area to be heated during the massage. The heating module 407 may specifically be a heating lamp, heating wire, heating plate, or other components.

[0031] refer to Figure 5In some embodiments of this application, the abutment surface 203 has a first segment 501. Along the second direction, the distance between the first segment 501 and the drive member 401 is less than the distance between the remaining segments of the abutment surface 203 and the drive member 401. Along the first direction, at least a portion of the first segment 501 is located upstream of the abutment surface 203. The first segment 501 is closest to the drive member 401 than the other segments of the abutment surface 203. Therefore, when the guide rod 205 slides to the first segment 501, it is pushed out to the greatest extent, and the massage head 204 extends to the greatest extent at this time. The first segment 501 is positioned upstream of the abutment surface 203, which can effectively massage the user's neck area. After the bracket 201 is placed inside the chair back 101, it is at a height equivalent to the chair back 101. This position can fit the neck position of most users. The neck is more concave than the back of the head and back, so the massage head 204 at this position extends to the greatest extent to massage the neck, improving the user experience.

[0032] It should be noted that "resistance surface 203 upstream" refers to the upstream of... Figure 5 The centerline of the bracket 201 shown ( Figure 5 Using the horizontal dotted line as a reference, the area above, the first segment 501 upstream, can effectively massage the neck or the upper part of the back.

[0033] refer to Figure 5 In some embodiments of this application, the abutment surface 203 has a second segment 502. Along the first direction, the second segment 502 is located upstream of the first segment 501. Along the second direction, the distance between the second segment 502 and the drive member 401 is greater than the distance between the remaining segments of the abutment surface 203 and the drive member 401. The second segment 502 is located at the top of the abutment surface 203, corresponding to the position of the back of the head, which is usually less demanding for massage. Furthermore, when a user sits in the seat 100, the back of the head is usually tilted back to a certain extent. Therefore, the position of the second segment 502 is set to be furthest from the drive member 401, and the extension of the massage head 204 is minimized, avoiding pressure on the back of the user's head during use and improving the user experience.

[0034] refer to Figure 5 In some embodiments of this application, the abutment surface 203 has a first transition section 503, with its two ends connecting to the first section 501 and the second section 502, respectively. The distance between the first transition section 503 and the driving member 401 gradually decreases from the second section 502 towards the first section 501. The first transition section 503 makes the connection between the first section 501 and the second section 502 less abrupt. When the guide rod 205 slides from the second section 502 to the first section 501, it slowly rises via the first transition section 503 (rising refers to moving towards the driving member 401, i.e.,...). Figure 5Moving to the left from the center, and moving downwards, refers to moving away from the drive unit 401. Figure 5 (Move from center to right), the massage head 204 also extends slowly, so the user will not feel it is too abrupt during use, resulting in a better experience.

[0035] refer to Figure 5 In some embodiments of this application, the supporting surface 203 has a third segment 504 and a second transition segment 505. The two ends of the second transition segment 505 are respectively connected to the first segment 501 and the third segment 504. Along the first direction, the third segment 504 is located downstream of the first segment 501. From the first segment 501 to the third segment 504, the distance between the second transition segment 505 and the driving member 401 gradually increases. The third segment 504 is located at the bottom of the supporting surface 203. This area corresponds to the lower back area of ​​the human body, where the need for massage is relatively small. Therefore, the position of the third segment 504 is set further away from the first segment 501 and the driving member 401, and the extension of the massage head 204 is also smaller, avoiding pressure on the lower back area of ​​the user during use and improving the user experience. The second transition section 505 makes the connection between the first section 501 and the third section 504 less abrupt. When the guide rod 205 slides from the first section 501 to the third section 504, it descends slowly via the second transition section 505, and the massage head 204 also retracts slowly. The user will not feel any abruptness during use, resulting in a better experience. Similarly, when the drive component 401 slides from bottom to top along the first direction, the guide rod 205 slides through the third section 504, the first section 501, and the second section 502 in sequence, and it will also be smoother under the action of the first transition section 503 and the second transition section 505.

[0036] refer to Figure 5 In some embodiments of this application, the first transition segment 503 is inclined relative to the first segment 501 and has a first slope ( Figure 5 (angle β), the second transition segment 505 is inclined relative to the first segment 501 and has a second slope ( Figure 5In the first transition segment 503, the first slope is greater than the second slope, and / or, along the first direction, the size of the first transition segment 503 is smaller than the size of the second transition segment 505. The first slope being greater than the second slope makes the transition from the second segment 502 to the first segment 501 more perceptible than the transition from the first segment 501 to the third segment 504. This is because the shape change from the user's head to the neck and back is more pronounced than the shape change from the upper half of the back to the lower half. From the second segment 502 to the first segment 501, the massage head 204 needs to extend more noticeably to massage the user's neck, allowing the user to perceive that the massage head 204 has extended and is massaging, thus improving the user experience. The perceived change in the back does not need to be very rapid; the transition from the upper half of the back to the lower half can be a slow rise or fall, therefore the second slope is set relatively small. It should be noted that... Figure 5 The dotted lines in the diagram are auxiliary lines parallel to the first segment 501, used to represent the first and second slopes. As for the first direction, the size of the first transition segment 503 is smaller than the size of the second transition segment 505. The former is to enhance user perception, while the latter is to minimize it. Areas such as the back of the head and neck experience significant shape changes within a short distance; therefore, the size of the first transition segment 503 cannot be too long to fit most human bodies. The back area, however, is relatively flat, and different users will not experience significant shape changes. Therefore, the second transition segment 505 is designed to be longer and flatter to adapt to the human body.

[0037] In summary, this application can adapt to most users by adjusting the shape of the guide rail 202. It does not require much cost or intelligent design. The fixed mechanical structure can meet most needs. While reducing costs, it still provides a good user experience. The shape of the support surface 203 can be designed in various forms. It can adjust its height based on big data analysis of the section that the user's neck or back most often leans on, or it can be customized according to the user's needs. The design and manufacturing methods are flexible and diverse.

[0038] refer to Figure 4 , Figure 6 and Figure 7In some embodiments of this application, the chair back 101 includes a worm gear 402, a worm 403, a driving tooth 404, and a first driven tooth 405. The power end of the driving member 401 is connected to the worm 403, and the worm 403 is connected to the worm gear 402 in a transmission connection. The driving tooth 404 is coaxially connected to the worm gear 402. The first driven tooth 405 meshes with the driving tooth 404. The guide rod 205 is slidably disposed in the first driven tooth 405. The first driven tooth 405 has a first abutment surface 409, and the guide rod 205 has a second abutment surface 410. When the first driven tooth 405 rotates, the first abutment surface 409 abuts against the second abutment surface 410 to drive the guide rod 205 to rotate. The worm gear 402 and worm 403 drive a smooth transmission process, and only the worm 403 can drive the worm gear 402; reverse transmission is not possible. This provides safety protection for the drive component 401. Furthermore, the worm gear 402 and worm 403 drive can change the transmission direction, adjusting the transmission shaft from perpendicular to the second direction to parallel to it, which is beneficial for the drive component 401 to be placed horizontally, improving the structural compactness. The gear transmission has a precise transmission ratio, so the desired rotational speed of the massage head 204 can be obtained by adjusting the diameter relationship between the driving gear 404, the first driven gear 405, and the worm gear 402, thus enhancing the massage experience. The first driven tooth 405 is designed with a first abutting surface 409, and the guide rod 205 has a second abutting surface 410. Therefore, the guide rod 205 can only slide axially relative to the first driven tooth 405. When the first driven tooth 405 rotates, it will drive the guide rod 205 to rotate together, so that the process of the abutting surface 203 pushing the guide rod 205 to rise and fall does not interfere with the process of the driving member 401 driving the guide rod 205 to rotate.

[0039] It should be noted that in some embodiments, the guide rod 205 may have a guide groove along the axial direction, and a protrusion may be provided inside the first driven tooth 405. The protrusion may be slidably provided in the guide groove, which can also achieve the process that the guide rod 205 can only slide relative to the first driven tooth 405 and cannot rotate relative to the first driven tooth 405 around its own axis.

[0040] refer to Figure 4 , Figure 6 and Figure 7In some embodiments of this application, the chair back 101 includes a rack 406 and a second driven tooth 601. The rack 406 extends along a first direction, and the second driven tooth 601 meshes with the rack 406 and is coaxially connected to the first driven tooth 405. A guide rod 205 slidably passes through the second driven tooth 601. When the first driven tooth 405 rotates, the second driven tooth 601 rotates to move relative to the rack 406 along the first direction. The engagement of the second driven tooth 601 with the rack 406 enables the drive member 401 to move itself along the rack 406. Furthermore, the gear and rack 406 transmission structure is stable, the transmission process is smooth with low noise, and it also has the advantages of simple structure and convenient maintenance. The drive component 401 drives the active gear 404 to rotate through the worm gear 402 and worm 403 structure. The active gear 404 drives the integrated first driven gear 405 and second driven gear 601 to rotate. The first driven gear 405 realizes the function of driving the massage head 204 to rotate, while the second driven gear 601 realizes the sliding along the rack 406, thereby driving the drive component 401 and the massage head 204 to slide in the first direction. In this process, the guide rod 205 is pushed by the undulating support surface 203, which realizes the lifting and lowering function of the massage head 204.

[0041] refer to Figure 2 and Figure 7 In some embodiments, the rack 406, worm gear 402, worm 403, first active gear 404 and other structures are all provided in two sets. The drive unit 401 is a dual-head motor, which drives the transmission structure on both sides to move at the same time. This design makes the overall structure more evenly stressed and the movement of the drive unit 401 more stable. This makes the lifting, extension and rotation functions of the massage head 204 operate more smoothly and improves the user experience.

[0042] refer to Figures 2 to 3 In some embodiments, the chair back 101 also includes a housing 206. The two sections of the housing 206 are sleeved on the guide rails on the outer periphery of the rack 406 and can slide along the rack 406. The drive component 401, rack 406, worm gear 402, worm 403, first drive tooth 404 and other structures are all set inside the housing 206. This can improve the aesthetics of the device and prevent the transmission mechanism from being contaminated or damaged.

[0043] refer to Figure 4 , Figure 6 and Figure 7In some embodiments of this application, the diameter of the first driven tooth 405 is larger than the diameter of the second driven tooth 601, and / or, the diameter of the first driven tooth 405 is larger than the diameter of the worm gear 402 and the driving tooth 404. The gear transmission has a precise transmission ratio, so the required rotational speed of the massage head 204 can be obtained by adjusting the diameter relationship between the driving tooth 404, the first driven tooth 405, and the worm gear 402. The larger diameter of the first driven tooth 405 compared to the driving tooth 404 and the worm gear 402 allows the high rotational speed of the drive member 401 to be reduced before being transmitted to the massage head 204, making the rotation of the massage head 204 more comfortable and improving the massage experience. Furthermore, the larger diameter of the first driven tooth 405 compared to the second driven tooth 601 ensures that the rotational speed of the massage head 204 is less than the sliding speed of the drive member 401 along the first direction, resulting in a faster sliding response while maintaining a slow and comfortable rotational massage from the massage head 204.

[0044] refer to Figure 1 The seat 100 according to the second aspect embodiment of this application includes the backrest 101 of any of the first aspect embodiments. By laying a guide rail 202 on the support 201, and the guide rail 202 having an undulating abutment surface 203, and then having the guide rod 205 connected to the massage head 204 abut against the guide rail 202, when the drive member 401 is activated, it can drive itself to move relative to the support 201 in a first direction, and can drive the massage head 204 to rotate through the guide rod 205. Since the other end of the guide rod 205 abuts against the undulating abutment surface 203, the guide rod 205 is also abutted against by the abutment surface 203 when it moves along the first direction with the drive member 401, thus rising and falling in a second direction. In this way, a single drive member 401 can realize the functions of up and down movement, rotation, and extension and retraction of the massage head 204, while retaining diverse massage functions. The internal structure of the backrest 101 is simpler and more compact, with stronger adaptability. More components can be placed inside the backrest 101 to improve the functionality of the entire seat 100.

[0045] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A chair back, characterized in that, include: The bracket is provided with a guide rail that extends along a first direction and has a support surface that undulates along a second direction, wherein the first direction and the second direction are perpendicular to each other. A driving component, which is slidably connected to the bracket; Massage head; The guide rod is connected to the massage head via the driving component. The driving component can drive the guide rod to rotate around its own axis. One end of the guide rod is fixedly connected to the massage head, and the other end abuts against the abutting surface. When the driving component is activated, the driving component can drive itself to slide relative to the bracket in the first direction, and drive the massage head to rotate through the guide rod, and the abutting surface abuts against the guide rod to drive the massage head to rise and fall in the second direction.

2. The chair back according to claim 1, characterized in that, The abutting surface has a first segment, and along the second direction, the distance between the first segment and the driving member is less than the distance between the remaining segments of the abutting surface and the driving member, and along the first direction, at least a portion of the first segment is located upstream of the abutting surface.

3. The chair back according to claim 2, characterized in that, The abutment surface has a second segment along the first direction, the second segment being located upstream of the first segment, and along the second direction, the distance between the second segment and the driving member is greater than the distance between the remaining segments of the abutment surface and the driving member.

4. The chair back according to claim 3, characterized in that, The abutment surface has a first transition section, the two ends of which are connected to the first segment and the second segment respectively. From the second segment to the first segment, the distance between the first transition section and the driving member gradually decreases.

5. The chair back according to claim 4, characterized in that, The abutment surface has a third section and a second transition section. The two ends of the second transition section are respectively connected to the first section and the third section. Along the first direction, the third section is located downstream of the first section. From the first section to the third section, the distance between the second transition section and the driving member gradually increases.

6. The chair back according to claim 5, characterized in that, The first transition segment is inclined relative to the first segment and has a first slope, the second transition segment is inclined relative to the first segment and has a second slope, the first slope is greater than the second slope, and / or, along the first direction, the size of the first transition segment is smaller than the size of the second transition segment.

7. The chair back according to claim 1, characterized in that, The chair back includes a worm gear, a worm, a driving tooth, and a first driven tooth. The power end of the driving member is connected to the worm, and the worm is connected to the worm gear. The driving tooth is coaxially connected to the worm gear. The first driven tooth meshes with the driving tooth. The guide rod is slidably inserted through the first driven tooth. The first driven tooth has a first abutting surface, and the guide rod has a second abutting surface. When the first driven tooth rotates, the first abutting surface abuts against the second abutting surface to drive the guide rod to rotate.

8. The chair back according to claim 7, characterized in that, The chair back includes a rack and a second driven tooth. The rack extends along the first direction, and the second driven tooth meshes with the rack and is coaxially connected to the first driven tooth. The guide rod is slidably inserted through the second driven tooth. When the first driven tooth rotates, the second driven tooth rotates to move relative to the rack along the first direction.

9. The chair back according to claim 8, characterized in that, The diameter of the first driven tooth is greater than the diameter of the second driven tooth, and / or the diameter of the first driven tooth is greater than the diameter of the worm gear and the driving tooth.

10. A seat, characterized in that, The chair back includes any one of claims 1 to 9.

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