Locking assembly and headrest

Abstract

The application relates to a locking assembly and a headrest. The locking assembly comprises a locking piece and a locking block. The locking piece is arranged on the outer periphery of a rotating shaft and is fixed relative to the circumference of the rotating shaft. At least part of the locking block is arranged on a first structural member. The locking block is located on one side of the locking piece. The locking block can move along a specified straight line on the first structural member towards the locking piece to engage the locking block with the locking piece, so as to limit the relative rotation of the first structural member and a second structural member. The locking block can move along the specified straight line on the first structural member away from the locking piece to separate the locking block from the locking piece, so as to release the limitation on the first structural member and the second structural member. The locking assembly can quickly lock, has a small processing difficulty, is easy to operate, and is convenient for use of the headrest.

Description

[0001] This application claims the following priority: prior application number 202521105260.5, with a priority date of May 30, 2025. Although this application does not repeat the description of the aforementioned prior application, the description, claims, and drawings of the prior application are incorporated herein by reference in their entirety and are considered part of the scope of this application. Technical Field

[0002] This application relates to the field of headrest technology, and in particular to a locking component and method. Background Technology

[0003] With the fast pace of modern life and increasing work pressure, people are paying more and more attention to the importance of short breaks, especially office workers who sit for long periods of time. Lunch break has become a crucial time to relieve morning fatigue and restore energy. In response, headrests have been introduced to the market for users to use during lunch breaks. These headrests support the user's head, improving comfort during lunch breaks.

[0004] Some headrests for lunch breaks include a support component, a headrest, a base, and locking components. The two ends of the support component are rotatably connected to the base and headrest, respectively. Locking components are installed at opposite ends of the support component to lock the relative positions between the support component and the base, and between the support component and the headrest. In use, the two ends of the support component can be rotated relative to the base and headrest, allowing adjustment of the headrest's height and angle. Once adjusted, the locking components lock the relative positions of the support component and the base, as well as the headrest, for user convenience.

[0005] However, the locking component in the headrest of the related technology achieves the locking function by meshing two gears. During adjustment, the locking teeth on the two gears need to mesh one by one in a step-by-step manner, which cannot lock quickly. In addition, it requires high precision in the machining of the gears and is difficult to manufacture. Utility Model Content

[0006] Therefore, it is necessary to provide a locking component and a headrest to address the above problems. The locking component can lock quickly, is easy to manufacture, and is easy to operate, making the headrest convenient to use.

[0007] On one hand, a locking assembly is provided for use in a rotating mechanism, the rotating mechanism including a first structural member, a second structural member, and a rotating shaft, the first structural member being rotatably connected to the second structural member via the rotating shaft, and the locking assembly including:

[0008] A locking element, wherein the locking element is disposed on the outer periphery of the rotating shaft, and the locking element is fixed circumferentially relative to the rotating shaft; and

[0009] A locking block, at least a portion of which is disposed on the first structural member, is located on one side of the locking member. The locking block is movable along a predetermined straight line on the first structural member toward the locking member to engage with the locking member, thereby restricting relative rotation between the first and second structural members. The locking block is also movable along the predetermined straight line on the first structural member toward the distance from the locking member to separate from the locking member, thereby releasing the restriction on the first and second structural members.

[0010] In one embodiment, the locking member is a one-way gear, which prevents the locking member from rotating in a first direction relative to the locking member when the locking block engages with the locking member, thereby limiting the reduction of the included angle α between the first structural member and the second structural member.

[0011] In one embodiment, the locking block is provided with an engagement surface and a guide surface, both of which are located at the end where the locking block engages with the locking member. The engagement surface can restrict the locking member from rotating relative to the locking member in the first direction, and the guide surface can guide the locking member to rotate relative to the locking block in the second direction, which is opposite to the first direction.

[0012] In one embodiment, the locking member includes a plurality of locking positions, which are spaced apart around the locking block. One end of the locking block can be inserted into any of the locking positions so that the locking block can engage with the locking member.

[0013] In one embodiment, the locking element further includes a gear body and a plurality of teeth evenly arranged on the outer periphery of the gear body. The gear body is connected to the rotating shaft, and the teeth are used to mesh with the locking block. The plurality of teeth are evenly and spaced around the axis of the gear body, and the locking position is formed between two adjacent teeth. The total distribution range of the locking position on the outer periphery of the gear body has an arc of β, where 0° < β ≤ 180°.

[0014] In one embodiment, the total radian β of the tooth distribution on the gear body is 90°.

[0015] In one embodiment, the first structural member is a support member of the headrest, and the second structural member is a headrest or base of the headrest.

[0016] In one embodiment, the first structural member is provided with a mounting hole, the locking member is disposed in the mounting hole, and at least a portion of the locking block is disposed inside the first structural member, the locking block being able to enter the mounting hole and engage with the locking member.

[0017] In one embodiment, a driving member is further included, at least a portion of which is disposed inside the first structural member. The driving member is connected to the locking block and is capable of driving the locking block to move along the predetermined straight line.

[0018] In one embodiment, a control element is further included, at least a portion of which is exposed outside the first structural member. The control element is connected to the drive element, and both the control element and the drive element are movable relative to the first structural member. The control element is capable of driving the drive element to move, thereby driving the locking block to move along the predetermined straight line.

[0019] In one embodiment, an elastic element is further included, which is connected to at least one of the locking block, the drive element, and the control element, and the elastic element always has a tendency to drive the locking block toward the locking element.

[0020] In one embodiment, a positioning post is further included, which is connected to the driving member, and an elastic member is sleeved on the outer periphery of the positioning post, with one end of the elastic member away from the driving member used to connect to the first structural member.

[0021] On the other hand, a headrest is also provided, including a first structural member, a second structural member, a pivot, and the aforementioned locking assembly. The first structural member is a support member of the headrest, and the second structural member is a headrest member of the headrest. The headrest member is used to support the user's head, and the support member is rotatably connected to the headrest member through the pivot.

[0022] In one embodiment, the support includes two second structural members, one of which is the headrest and the other is the base of the headrest. Two pivots and two locking assemblies are provided. One end of the support is rotatably connected to the headrest via one of the pivots, and the other end of the support is rotatably connected to the base via the other pivot. Two locking assemblies are respectively disposed at the two ends of the support where the headrest and the base are located. The locking assembly closer to the headrest restricts relative rotation between the support and the headrest, and the locking assembly closer to the base restricts relative rotation between the support and the base.

[0023] In one embodiment, when the locking assembly includes a control member and a drive member, the drive member is used to drive the locking block to move along the set straight line. The drive members of the two sets of locking assemblies share a single control member. The control member abuts against the drive members of the two locking assemblies respectively. The movement of the control member can drive the drive members of the two locking assemblies to move, so as to drive the locking blocks of the two locking assemblies to move towards the locking member in the same locking assembly.

[0024] In one embodiment, the control element includes a push block, a knob, and a connecting rod. The push block is disposed inside the support and rotatably connected to the support. The knob is disposed outside the support. The connecting rod connects the push block and the knob. Rotating the knob can drive the push block to rotate via the connecting rod, so that the rotation of the push block can drive the drive members of the two locking assemblies to move away from each other.

[0025] In one embodiment, the driving member includes a first body and a second body connected to the first body. The first body is disposed at one end of the second body near the locking member. The second body includes a first segment and at least one second segment connected to the first segment. The first segment and the second segment are disposed at an angle. The second segment is connected between the first segment and the first body. The first segments of the two locking components are spaced apart and disposed opposite to each other. The push block is disposed between the first segments of the driving member in the two locking components.

[0026] In one embodiment, the knob includes a knob body and a decorative cover, the knob body being connected to the connecting rod, and the decorative cover being disposed on the outer periphery of the knob body.

[0027] In the aforementioned locking assembly, the locking block moves along a predetermined straight line on the first structural member towards the locking member, causing the locking block to engage with the locking member to restrict relative rotation between the first and second structural members. Conversely, the locking block moves along the predetermined straight line away from the locking member on the first structural member, causing the locking block to disengage from the locking member to release the restriction on the first and second structural members. Through the cooperation of the locking block and the locking member, the relative positions of the first and second structural members can be quickly locked. Furthermore, the machining precision requirements for the locking block and the locking member are low, which helps reduce the machining difficulty of the locking assembly, facilitates adjustment of the included angle between the first and second structural members, and is convenient for user operation. Attached Figure Description

[0028] Figure 1 This is a perspective view of the headrest in some embodiments of this application (the headrest is in a folded state).

[0029] Figure 2 This is a perspective view of the headrest in some embodiments of this application (the headrest is in an open state).

[0030] Figure 3 This is a perspective view of the headrest from another angle in some embodiments of this application (the headrest is in a folded state).

[0031] Figure 4 for Figure 3 The headrest shown is a cross-sectional view.

[0032] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0033] Figure 6 This is a structural diagram of the support member, rotating component, and locking assembly in some embodiments of this application.

[0034] Figure 7 This is a first exploded view of the support member, rotating component, and locking assembly in some embodiments of this application.

[0035] Figure 8 This is a second exploded view of the support member, rotating component, and locking assembly in some embodiments of this application.

[0036] Figure 9 This is a cross-sectional view of the support member, rotating component, and locking assembly in some embodiments of this application.

[0037] Figure 10 for Figure 9 A magnified view of a section at point B.

[0038] Figure 11 This is a perspective view of the control components in some embodiments of this application.

[0039] Figure 12 This is a schematic diagram of a gear transmission structure in some embodiments of this application.

[0040] 100. Support component; 101. Support body; 1011. Rib plate; 102. Connecting part; 1021. Mounting hole; 103. Protective cover; 200. Head support component; 300. Base; 400. Rotating component; 401. Shaft; 4011. Shaft body; 4012. Extension rod; 402. Connecting block; 1. Locking component; 11. Gear body; 12. Gear tooth; 13. Locking position; 2. Locking block; 21. 1. Engaging surface; 22. Guide surface; 23. Transition surface; 3. Driving component; 31. First body; 311. Sliding hole; 32. Second body; 321. First section; 322. Second section; 4. Elastic component; 5. Positioning post; 6. Control component; 61. Push block; 62. Connecting rod; 63. Knob; 7. Fixing assembly; 71. Fixing component; 72. Limiting block; 8. Connecting hole; 9. Rack; 10. Rotating gear. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0047] See Figure 7 , Figure 7 A first exploded view of the support member 100, the rotating member 400, and the locking assembly in some embodiments of this application is shown; Figure 8 A second exploded view of the support member 100, the rotating component 400, and the locking assembly in some embodiments of this application is shown. One embodiment of the locking assembly provided in this application is applied in a rotating mechanism. The rotating mechanism includes a first structural member, a second structural member, a rotating shaft 401, and the locking assembly. The first structural member is rotatably connected to the second structural member via the rotating shaft 401 of the rotating component 400. The locking assembly includes a locking member 1 and a locking block 2. The locking member 1 is disposed on the outer periphery of the rotating shaft 401, and the locking member 1 is fixed circumferentially relative to the rotating shaft 401. In this example, the locking member 1 is arranged in a ring around the outer periphery of the rotating shaft 401. In other examples, the locking member 1 may also be arranged in a semi-ring around the outer periphery of the rotating shaft 401. No specific limitation is made here regarding the manner in which the locking member 1 is disposed on the outer periphery of the rotating shaft 401. At least a portion of the locking block 2 is disposed on the first structural member. The locking block 2 is located on one side of the locking member 1. The locking block 2 can move along a set straight line on the first structural member toward the locking member 1 to engage with the locking member 1, thereby restricting the relative rotation of the first structural member and the second structural member. The locking block 2 can also move along a set straight line on the first structural member away from the locking member 1 to separate from the locking member 1, thereby releasing the restriction on the first structural member and the second structural member.

[0048] The first structural component is rotatably connected to the second structural component via a rotating shaft 401. Since the locking element 1 is located on the outer periphery of the rotating shaft 401 and is fixed circumferentially relative to the rotating shaft 401, when the locking block 2 on the first structural component engages with the locking element 1, it can restrict the rotation of the first structural component relative to the second structural component, thereby locking the relative positions of the first and second structural components. When it is necessary to adjust the included angle between the first and second structural components, the locking block 2 is moved along a set straight line on the first structural component in a direction away from the locking element 1 until the locking block 2 separates from the locking element 1, thereby releasing the restriction on the first and second structural components.

[0049] In this type of locking assembly, the locking block 2 moves along a set straight line on the first structural member toward the locking member, causing the locking block 2 to engage with the locking member 1 to restrict the relative rotation of the first and second structural members. The locking block 2 also moves along a set straight line away from the locking member 1 on the first structural member, causing the locking block 2 to separate from the locking member 1 to release the restriction on the first and second structural members. Through the cooperation of the locking block 2 and the locking member 1, the relative positions of the first and second structural members can be quickly locked. Furthermore, the machining accuracy requirements for the locking block 2 and the locking member 1 are low, which helps reduce the machining difficulty of the locking assembly, facilitates adjustment of the included angle between the first and second structural members, and makes user operation convenient.

[0050] It can be explained that the set line is parallel to the line where the locking block 2 points to the locking member 1.

[0051] The rotating mechanism can be a headrest, phone holder, or reading stand, etc. The following description uses a headrest as an example to further illustrate the specific structure of the locking assembly.

[0052] See Figure 1 and Figure 2 , Figure 1 An angle perspective view of the headrest (in a folded state) is shown in some embodiments of this application. Figure 2 A perspective view of a headrest (in an open state) is shown in some embodiments of this application. When the above-described locking assembly is applied to the headrest, the first structural member is the headrest support 100, and the second structural member is the headrest 200, which supports the user's head.

[0053] In some embodiments, the locking element 1 is a one-way gear. When the locking block 2 engages with the locking element 1, the locking block 2 prevents the locking element 1 from rotating relative to it in a first direction, thereby limiting the reduction of the included angle α between the support member 100 (i.e., the first structural member) and the headrest member 200 (i.e., the second structural member). Thus, when the locking block 2 and the locking element 1 are engaged, the locking element 1 cannot rotate in the first direction but can only rotate in the second direction. At this time, the included angle α between the support member 100 and the headrest member 200 cannot be reduced; it can only be increased. Therefore, when the locking block 2 and the locking element 1 are engaged, the user can increase the included angle α between the support member 100 and the headrest member 200 as needed. Through the one-way locking of the locking element 1 by the locking block 2, the included angle α between the support member 100 and the headrest member 200 is prevented from being accidentally reduced after the headrest is adjusted, thus preventing the normal use of the headrest from being affected.

[0054] It should be noted that in this application, when the locking member 1 rotates relative to the locking block 2 in the first direction, the included angle α between the support member 100 (i.e., the first structural member) and the head support member 200 (the second structural member) decreases, that is, the first direction is the direction indicated by the Y arrow in the figure.

[0055] Of course, in other examples, the locking element 1 can also be set as a two-way gear. When the locking element 1 is a two-way gear, when the locking block 2 engages with the locking element 1, it prevents the locking element 1 from rotating in the first and second directions, thus achieving two-way locking. At this time, the support 100 (first structural element) and the head support 200 (i.e., the second structural element) cannot rotate relative to each other.

[0056] It can be explained that the second direction is opposite to the first direction. When the locking member 1 rotates in the second direction, the included angle α between the support member 100 (i.e. the first structural member) and the head support member 200 (i.e. the second structural member) increases. That is, the second direction is the direction indicated by the X arrow in the figure.

[0057] When the locking element 1 is a one-way gear, combined with Figure 9 and Figure 10 The locking block 2 is provided with a biting surface 21 and a guide surface 22. Both the biting surface 21 and the guide surface 22 are provided at the end where the locking block 2 and the locking member 1 are biting. The biting surface 21 can restrict the locking member 1 from rotating in a first direction relative to the locking block 2, and the guide surface 22 can guide the locking member 1 to rotate in a second direction relative to the locking block 2.

[0058] The locking member 1 includes multiple locking positions 13, which are spaced apart around the locking block 2. One end of the locking block 2 can be inserted into any of the locking positions 13 so that the locking block 2 can engage with the locking member 1. The multiple locking positions 13 can lock the support member 100 and the headrest member 200 in multiple positions, realizing the adjustment of the headrest in multiple positions.

[0059] In this example, there are seven teeth 12, and a locking position 13 is formed between two adjacent teeth 12. Therefore, there are six locking positions 13. In other examples, the number of locking positions 13 can be flexibly adjusted as needed, and there is no specific limit to the number of locking positions 13 here.

[0060] In one example, the locking element 1 further includes a gear body 11 and a plurality of teeth 12 evenly distributed on the outer periphery of the gear body 11. The gear body 11 is connected to a rotating shaft 401. In this example, the axis of the gear body 11 coincides with the axis of the rotating shaft 401, and the teeth 12 are used to engage with the meshing surface 21 of the locking block 2. It should be noted that when the locking element 1 includes the gear body 11, the axis of the locking element 1 is the axis of the gear body 11. The plurality of teeth 12 are evenly and spaced around the axis of the gear body 11, wherein the axis is set to be the axis of the gear body 11. A locking position 13 is formed between two adjacent teeth 12, and the total arc of the locking position 13 on the outer periphery of the gear body 11 is β, 0°<β≤180°. The guide surface 22 is an inclined surface. When the locking element 1 rotates in the second direction, the guide surface 22 guides the locking element 1 to slide over the locking block 2, preventing the locking element 1 from being jammed. Setting 0°<β≤180° allows for a larger range of angle adjustment between the support member 100 (i.e., the first structural member) and the head support member 200 (i.e., the second structural member), thus meeting user needs.

[0061] It can be explained that the total distribution range of the locking position 13 on the outer circumference of the gear body 11 refers to the radian of the angle range covered by all the locking positions 13 on the same locking member 1 in the circumferential direction.

[0062] Furthermore, the total distribution arc β of the gear teeth 12 on the gear body 11 is 90°, so that the adjustment angle between the support member 100 (i.e. the first structural member) and the head support member 200 (i.e. the second structural member) can be limited to 0°-90°.

[0063] Of course, in other examples, the total distribution arc β of the gear teeth 12 on the gear body 11 can be flexibly adjusted as needed, for example, β can be adjusted to 120°, 250° or 180°, etc.

[0064] To reduce the risk of the locking block 2 scratching the locking element 1, a transition surface 23 is provided at the end where the locking block 2 and the locking element 1 engage. The transition surface 23 connects the engagement surface 21 and the guide surface 22. The transition surface 23 is an arc-shaped surface. By providing the transition surface 23 with an arc-shaped structure, the engagement surface 21 and the guide surface 22 can transition smoothly, avoiding sharp edges at the end where the locking block 2 and the locking element 1 engage.

[0065] In some embodiments, a headrest is provided, see below. Figure 1 , Figure 2 and Figure 3 The headrest includes a headrest 200, a support member 100, a rotating component 400, and a locking assembly of any of the above structures. The headrest 200 supports the user's head, and one end of the support member 100 is rotatably connected to the headrest 200 via the rotating component 400. (See also...) Figure 4 and Figure 5 The rotating component 400 includes a rotating shaft 401 and a connecting block 402. The rotating shaft 401 passes through the connecting block 402 and is circumferentially fixed relative to the connecting block 402. One end of the connecting block 402 is fixed to the head support 200. One end of the support 100 is rotatably connected to the rotating shaft 401 so that the support 100 can be rotatably connected to the head support 200 through the rotating shaft 401.

[0066] In this example, the first structural component is the support component 100, and the second structural component is the head support component 200. Since the support component 100 is rotatably connected to the head support component 200 via a rotating shaft 401, when the locking block 2 of the locking assembly is separated from the locking element 1, the head support component 200 can be rotated relative to the support component 100. This allows adjustment of the angle between the head support component 200 and the support component 100, thus adjusting the operating angle of the head support component 200 to meet user needs. When the head support component 200 is adjusted to a suitable operating angle, the locking block 2 and the locking element 1 engage, restricting the relative rotation of the support component 100 and the head support component 200, thereby preventing the angle between them from unexpectedly increasing or decreasing. The cooperation of the locking block 2 and the locking element 1 allows for quick locking of the relative position of the support component 100 and the head support component 200, reducing the precision requirements for the machining of the locking block 2 and the locking element 1, and helping to reduce the machining difficulty of the locking assembly.

[0067] In one example, the headrest also includes a base 300. When the headrest includes a base 300, there are two rotating components 400 and two locking assemblies. One end of the support member 100 is rotatably connected to the headrest member 200 via a pivot 401 of one of the rotating components 400, and the other end of the support member 100 is rotatably connected to the base 300 via a pivot 401 of the other rotating component 400. Two locking assemblies are respectively disposed at the two ends of the support member 100 where the headrest member 200 and the base 300 are connected. The locking assembly near the headrest member 200 restricts the rotation of the support member 100 relative to the headrest member 200, and the locking assembly near the base 300 restricts the rotation of the support member 100 relative to the base 300.

[0068] In this type of headrest, the support member 100 is the first structural component, and the headrest 200 and the base 300 are both second structural components. That is, there are two second structural components: one is the headrest 200, and the other is the base 300. The base 300 is used to support the headrest as a whole on a placement surface, such as a table, ensuring stable placement. By rotatably connecting one end of the support member 100 to the headrest 200 via a pivot 401 of one of the rotating components 400, and by rotatably connecting the other end of the support member 100 to the base 300 via a pivot 401 of the other rotating component 400, the angle α between the support member 100 and the headrest 200, and the angle α between the support member 100 and the base 300, can be adjusted respectively. This allows for adjustment of the usage angle of the headrest 200 and the height of the support member 100, improving the adjustability of the headrest.

[0069] In actual use, with the locking block 2 separated from the locking member 1, the angles α between the support members 100 and the headrest 200, and between the support member 100 and the base 300, can be adjusted to decrease. This allows the headrest 200 and the base 300 to be fitted onto opposite sides of the support member 100, enabling the headrest to fold and be easily stored. When the headrest is needed, the angles α between the support members 100 and the headrest 200, and between the support member 100 and the base 300, can be increased to open the headrest.

[0070] When the locking element 1 is a one-way gear, when the locking block 2 engages with the locking element 1, it restricts the locking element 1 from rotating in the first direction, thereby restricting the rotation of the support member 100 relative to the headrest member 200, and preventing the included angle between the support member 100 and the headrest member 200 from decreasing; when the locking block 2 engages with the one-way gear, it does not restrict the rotation of the one-way gear in the second direction. In this headrest, when the locking block 2 engages with the one-way gear, the included angle α between the support member 100 and the headrest member 200 or the included angle α between the support member 100 and the base 300 can be increased, but the included angle α between the support member 100 and the headrest member 200 or the included angle α between the support member 100 and the base 300 cannot be decreased. In actual use, when the locking block 2 and the locking member 1 are engaged, the angle α between the support member 100 and the headrest member 200 or the angle α between the support member 100 and the base 300 can be increased as needed. After the adjustment is in place, there is no need to perform the locking action, and the angle α between the support member 100 and the headrest member 200 or the angle α between the support member 100 and the base 300 will not decrease unexpectedly, ensuring the normal use of the headrest.

[0071] Combination Figure 7 The support member 100 is provided with a mounting hole 1021, the locking member 1 is disposed in the mounting hole 1021, and at least a portion of the locking block 2 is disposed inside the support member 100, allowing the locking block 2 to enter the mounting hole 1021 and engage with the locking member 1. In this way, at least a portion of the locking member 1 can be disposed inside the support member 100, improving the structural compactness between the support member 100, the rotating shaft 401, and the locking member 1.

[0072] Combination Figure 6 The support member 100 includes a support body 101 and a connecting portion 102 disposed at one end of the support body 101. When the headrest includes a base 300, connecting portions 102 are respectively provided at both ends of the support body 101. The connecting portion 102 of the support member 100 is rotatably connected to the base 300 or the headrest 200 via a rotating shaft 401. The connecting portion 102 is provided with a mounting hole 1021, and the portion of the rotating shaft 401 with a locking member 1 is disposed in the mounting hole 1021. A cavity is provided inside the support body 101, and a communicating hole 8 is provided between the support body 101 and the connecting portion 102, connecting the cavity and the mounting hole 1021. The locking block 2 is slidably disposed in the cavity of the support body 101. When the locking block 2 moves along a set straight line towards the locking member 1, the end of the locking block 2 that engages with the locking member 1 passes through the communicating hole 8 and enters the mounting hole 1021, so that the locking block 2 engages with the locking member 1.

[0073] In one example, combined Figure 5 , Figure 6 and Figure 7Two connecting parts 102 are provided on the same end of the support body 101. The two connecting parts 102 on the same end are distributed at intervals along the width direction of the support member 100, and the connecting block 402 is located between the two connecting parts 102.

[0074] When the support member 100 has two connecting parts 102 at the same end, the same locking assembly has two locking members 1 and two locking blocks 2. The locking members 1 and locking blocks 2 in the same locking assembly correspond one-to-one, and the locking blocks 2 can engage with their corresponding locking blocks 2. The two locking members 1 in the same locking assembly are respectively connected to the two axial ends of the rotating shaft 401. By setting two locking members 1 and two locking blocks 2 in the same locking assembly, and by the one-to-one engagement of the two locking blocks 2 with the two locking members 1, the limiting force between the headrest 200 or the base 300 and the support member 100 can be enhanced, thereby improving the reliability of the headrest.

[0075] Combination Figure 5 The headrest also includes a fixing component 7, which is used to fix the locking member 1 to the rotating shaft 401. The fixing component 7 includes a limiting block 72 and a fixing member 71. The rotating shaft 401 includes a shaft body 4011 and an extension rod 4012 disposed at one axial end of the shaft body 4011. The axis of the shaft body 4011 coincides with the axis of the extension rod 4012. The connecting block 402 is disposed on the outer periphery of the shaft body 4011. A portion of the shaft body 4011 protrudes radially from the outer periphery of the extension rod 4012, forming a first step between the shaft body 4011 and the extension rod 4012. A limiting block 72 is disposed at the end of the extension rod 4012 away from the shaft body 4011, and protrudes radially from the extension rod 4012. A second step is formed between the limiting block 72 and the extension rod 4012. A locking member 1 is sleeved on the outer periphery of the extension rod 4012 and located between the first and second steps. The extension rod 4012 is provided with a first connecting hole, and the limiting block 72 is provided with a second connecting hole, which communicates with the first connecting hole. One end of the fixing member 71 passes through the second connecting hole and is fixed in the first connecting hole, thereby limiting the locking member 1 on the rotating shaft 401. The fixing member 71 can be a screw, but is not limited to a screw; it can also be a rivet, etc.

[0076] In this example, the extension rod 4012 is a square rod, and the locking member 1 is provided with a square hole that matches the square rod. The locking member 1 is sleeved on the outer periphery of the extension rod 4012 through the square hole, so as to achieve circumferential relative fixation between the locking member 1 and the rotating shaft 401.

[0077] Furthermore, combined Figure 7 and Figure 8The support member 100 also includes a protective cover 103. The protective cover 103 is disposed on the side of the connecting part 102 facing away from the connecting block 402. The protective cover 103 is used to cover the opening of the mounting hole 1021 facing away from the connecting block 402, so that the locking member 1 is blocked inside the connecting part 102, preventing foreign objects from entering the interior of the mounting hole 1021 and affecting the normal use of the locking member 1. In addition, the protective cover 103 can also improve the aesthetics of the support member 100.

[0078] It is understandable that the number of protective covers 103 is equal to the number of connecting parts 102, and the protective covers 103 correspond one-to-one with the connecting parts 102. The protective covers 103 are located on the side of the corresponding connecting part 102 that faces away from the connecting block 402.

[0079] See Figure 7 , Figure 8 and Figure 9 The locking assembly also includes a driving member 3, at least a portion of which is disposed inside the support member 100. The driving member 3 is connected to the locking block 2 and can drive the locking block 2 to move relative to the locking member 1. Driving the locking block 2 by the driving member 3 facilitates engagement or disengagement between the locking block 2 and the locking member 1. When the support member 100 includes a support body 101, the driving member 3 is disposed within the cavity of the support body 101.

[0080] To facilitate the movement of the drive member 3, the locking assembly also includes a control member 6, at least a portion of which protrudes from the outside of the support member 100. The control member 6 is connected to the drive member 3, and both the control member 6 and the drive member 3 can move relative to the support member 100. The control member 6 can drive the drive member 3 to move relative to the support member 100, thereby causing the drive member 3 to drive the locking block 2 to move.

[0081] In one example, the control member 6 is a slider that is slidably connected to the support member 100 and can slide back and forth along a set straight line. Thus, by sliding the control member 6 along the set straight line, the locking block 2 can be driven by the drive member 3 to move back and forth along the set straight line, thereby causing the locking block 2 to engage or disengage from the locking member 1.

[0082] In another example, combined Figure 8 and Figure 11The locking block 2 always tends to move closer to the locking member 1 along a set straight line. In this case, the control member 6 includes a push block 61, a knob 63, and a connecting rod 62. The push block 61 is disposed inside the support body 101 of the support member 100 and is rotatably connected to the support body 101. The knob 63 is disposed outside the support body 101 of the support member 100. The connecting rod 62 connects the push block 61 and the knob 63. The push block 61 abuts against the drive member 3. The push block 61 is elongated. When the knob 63 is rotated, the push block 61 can be rotated inside the support body 101 so that the length direction of the push block 61 can be parallel to the set straight line. Under normal conditions, the locking block 2 and the locking member 1 are engaged under the action of the driving member 3. When the knob 63 is rotated outside the support member 100 until the length direction of the pushing block 61 is parallel to the set line, one end of the pushing block 61 overcomes the preload of the driving member 3, causing the driving member 3 to move away from the locking block 2 along the set line, thereby driving the locking block 2 and the locking member 1 to separate through the driving member 3.

[0083] Combination Figure 9 The locking assembly also includes an elastic element 4, which is connected to at least one of the locking block 2, the driving element 3, and the operating element 6. The elastic element 4 always has a tendency to drive the locking block 2 to move along a set straight line toward the locking element 1. In this example, the elastic element 4 is connected to the driving element 3. A stiffening plate 1011 is provided in the cavity of the support body 101, and the elastic element 4 is connected to the driving element 3 and the stiffening plate 1011 respectively. The elastic element 4 has the ability to elastically deform. Since the elastic element 4 always tends to drive the locking block 2 to move along a set straight line towards the locking element 1, the locking block 2 remains engaged with the locking element 1 when no external force is applied. When it is necessary to separate the locking block 2 from the locking element 1, the control element 6 applies an external force to the driving element 3, driving the driving element 3 to move away from the locking element 1, thereby moving the locking block 2 away from the locking element 1 until the locking block 2 separates from the locking element 1. When the external force is removed, under the elastic force of the elastic element 4, the locking block 2 can automatically move along a set straight line towards the locking element 1, achieving automatic engagement between the locking block 2 and the locking element 1. The elastic element 4 enables automatic engagement between the locking block 2 and the locking element 1, facilitating the operation of the locking assembly. In a feasible embodiment, the elastic element 4 is a spring or an elastic sheet.

[0084] Furthermore, continue to combine Figure 9The locking assembly also includes a positioning post 5, which is connected to the driving member 3. An elastic member 4 is sleeved on the outer periphery of the positioning post 5, and the end of the elastic member 4 away from the driving member 3 is used to connect to the support member 100. The stiffening plate 1011 is spaced apart from the driving member 3, and the positioning post 5 is located between the stiffening plate 1011 and the driving member 3. The elastic member 4 is sleeved on the outer periphery of the positioning post 5, and the positioning post 5 is used to position the elastic member 4 to prevent the movement path of the driving member 3 from deviating.

[0085] Of course, in actual implementation, the elastic element 4 can also be connected to the locking block 2 or the control element 6.

[0086] In one example, the drive member 3 is provided with a sliding hole 311. The length direction of the sliding hole 311 is parallel to the set straight line. The inner side wall of the support body 101 is provided with a protruding rod (the protruding rod is not shown in the figure because it is blocked by the side wall of the support body 101). The protruding rod is slidably disposed in the sliding hole 311. In this way, when the drive member 3 moves back and forth along the set straight line, the protruding rod slides in the sliding hole 311, so that the locking block 2 can move along the set straight line on the support member 100 in a direction closer to or away from the locking member 1.

[0087] In another example, the locking assembly also includes a lead screw (not shown in the figure) disposed inside the support 100. In this example, the lead screw is disposed inside the support body 101, and the length direction of the lead screw is parallel to a set straight line. The locking block 2 is slidably connected to the inner wall of the support body 101, and the locking block 2 is provided with a threaded hole. The lead screw passes through the threaded hole and is threadedly connected to the inner wall of the threaded hole. Thus, when the lead screw rotates in the forward or reverse direction, it can drive the locking block 2 to reciprocate along the set straight line, thereby realizing the engagement or disengagement of the locking block 2 and the locking member 1.

[0088] In another example, combined Figure 12Alternatively, a gear transmission structure can be used to move the locking block 2 along a predetermined straight line on the support member 100 towards or away from the locking member 1. The gear transmission structure includes a rack 9 and a rotating gear 10, both disposed inside the support member 100. The rack 9 and the rotating gear 10 are meshed together. The length direction of the rack 9 is parallel to the predetermined straight line. The rotating gear 10 is rotatably connected to the support member 100, and the rack 9 is fixed to the locking block 2. When the support member 100 includes a support body 101, the rotating gear 10 is rotatably connected to the inner wall of the support body 101. In this example, the locking block 2 is located at the end of the rack 9 closest to the locking member 1. The rotating gear 10 meshes with the rack 9. When the rotating gear 10 rotates in the forward direction, it drives the locking block 2 to move along a set straight line towards the locking member 1, causing the locking block 2 to engage with the locking member 1. When the rotating gear 10 rotates in the reverse direction, it drives the locking block 2 to move along a set straight line away from the locking member 1, causing the locking block 2 to disengage from the locking member 1. This design eliminates the need for the elastic element 4 to drive the locking block 2 to move along a set straight line towards the locking member 1. In actual implementation, the rotation of the rotating gear 10 can be driven manually or electrically, without specific limitations.

[0089] In another example, a sliding structure (not shown in the figure) is provided between the locking block 2 and the support member 100. The sliding structure includes a slide rail and a slider that slides in cooperation with the slide rail. One of the slide rail and the slider is provided on the locking block 2, and the other is provided on the support member 100. The length direction of the slide rail is parallel to a set straight line. By sliding the slider in cooperation with the slide rail, the locking block 2 can also move along the set straight line on the support member 100 in a direction closer to or away from the locking member 1.

[0090] It should be noted that there are many structures that enable the locking block 2 to move along a set straight line on the support member 100 in a direction closer to or further away from the locking member 1, and they will not be listed here.

[0091] In the case of a headrest with two locking components, in order to facilitate the separation of the locking block 2 of the two sets of locking components from the locking element 1 in the same locking component, combined with... Figure 2 , Figures 6 to 9The driving components 3 in both sets of locking assemblies share a single control component 6, meaning the control component 6 in both sets of locking assemblies is integrated into one unit. When a locking assembly includes a driving component 3, the control component 6 abuts against the driving components 3 of both locking assemblies respectively. The movement of the control component 6 can drive the driving components 3 of both locking assemblies to move, thereby causing the locking blocks 2 of both locking assemblies to move towards the locking component 1 of the same locking assembly. In this way, the locking blocks 2 of both sets of locking assemblies can be controlled simultaneously through a single control component 6, facilitating the folding and unfolding of the headrest and reducing the number of parts in the headrest, thus saving on manufacturing costs.

[0092] Furthermore, combined Figure 11 The control component 6 includes a push block 61, a knob 63, and a connecting rod 62. The push block 61 is disposed inside the support member 100 and is rotatably connected to the support member 100. The knob 63 is disposed outside the support member 100. The connecting rod 62 connects the push block 61 and the knob 63. Rotating the knob 63 can drive the push block 61 to rotate via the connecting rod 62, so that the rotation of the push block 61 can drive the driving members 3 in the two locking assemblies to move away from each other. The push block 61 is elongated. By controlling the push block 61 to rotate inside the support member 100 relative to the driving members 3 in the two locking assemblies, the two sides of the push block 61 in the length direction push the two driving members 3 away from each other, thereby driving the two locking blocks 2 to separate from the locking members 1 in the same locking assembly, releasing the engagement between the locking blocks 2 and the locking members 1.

[0093] Combination Figure 8 The driving component 3 includes a first body 31 and a second body 32 connected to the first body 31. The first body 31 is disposed at one end of the second body 32 near the locking component 1. The second body 32 includes a first segment 321 and at least one second segment 322 connected to the first segment 321. The first segment 321 and the second segment 322 are disposed at an angle. The second segment 322 is connected between the first segment 321 and the first body 31. The first segments 321 of the driving component 3 in the two locking components are spaced apart and arranged opposite to each other. The push block 61 is disposed between the first segments 321 of the driving component 3 in the two locking components. In this example, the second bodies 32 in the two locking components are staggered in the thickness direction of the support 100. When the locking blocks 2 in the two locking assemblies are engaged with the locking members 1 of the same locking assembly, the first segments 321 of the two second bodies 32 on both sides of the width direction of the pushing block 61 abut against each other. When it is necessary to separate the locking blocks 2 of the two locking assemblies from the locking members 1 of the same locking assembly, the pushing block 61 is rotated so that the two sides of the length direction of the pushing block 61 abut against the first segments 321 of the two second bodies 32 respectively. Driven by the pushing block 61, the two locking blocks 2 move closer to each other, thereby separating the locking blocks 2 in the two locking assemblies from the locking members 1 of the same locking assembly.

[0094] In this example, within the same second body 32, the first segment 321 is perpendicular to the second segment 322.

[0095] In one example, within the same second body 32, there are two second segments 322, which are parallel and spaced apart. Within the same second body 32, the two second segments 322 are respectively connected to the two ends of the first segment 321.

[0096] Of course, the shape of the push block 61 is not limited to a long strip. In other instances, the push block 61 can also be set to other shapes, such as a rhombus.

[0097] In one example, the knob 63 includes a knob body (not shown in the figure) and a decorative cover (not shown in the figure). The knob body is connected to the connecting rod 62, and the decorative cover is disposed on the outer periphery of the knob body, with an anti-slip structure formed on the outer periphery of the decorative cover. In this example, the anti-slip structure consists of multiple striped patterns extending along the axial direction of the decorative cover and arranged at equal intervals. The striped patterns can both increase the friction of the decorative cover surface to prevent the user from slipping during operation and enhance the aesthetics of the knob 63, thereby improving the overall aesthetics of the headrest.

[0098] In another example, the anti-slip structure can also be a pattern or other shape.

[0099] Of course, in other examples, an anti-slip structure can also be directly installed on the knob body.

[0100] It should be noted that in other embodiments, the headrest does not include the base 300. Instead, it is fixed to the placement component by setting suction cups or clamping heads on the support 100, thereby reducing the planar requirements of the placement component and improving the applicability of the headrest.

[0101] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A locking assembly, characterized in that, Applied to a rotating mechanism, the rotating mechanism includes a first structural member, a second structural member, and a rotating shaft, wherein the first structural member is rotatably connected to the second structural member via the rotating shaft, and the locking assembly includes: A locking element, wherein the locking element is disposed on the outer periphery of the rotating shaft, and the locking element is fixed circumferentially relative to the rotating shaft; and A locking block, at least a portion of which is disposed on the first structural member, is located on one side of the locking member. The locking block is capable of moving along a predetermined straight line on the first structural member toward the locking member to engage with the locking member, thereby restricting relative rotation between the first structural member and the second structural member. The locking block is also capable of moving along the predetermined straight line on the first structural member away from the locking member to separate from the locking member, thereby releasing the restriction on the first structural member and the second structural member.

2. The locking assembly according to claim 1, characterized in that, The locking element is a one-way gear. When the locking block engages with the locking element, it prevents the locking element from rotating in the first direction relative to the locking block, thereby limiting the reduction of the included angle between the first structural member and the second structural member.

3. The locking assembly according to claim 2, characterized in that, The locking block is provided with a biting surface and a guide surface, both of which are located at the end where the locking block and the locking member are biting. The biting surface can restrict the locking member from rotating relative to the locking block in the first direction, and the guide surface can guide the locking member to rotate relative to the locking block in the second direction, which is opposite to the first direction.

4. The locking assembly according to claim 2, characterized in that, The locking element includes multiple locking positions, which are spaced apart around the axis of the locking block. One end of the locking block can be inserted into any of the locking positions so that the locking block can engage with the locking element.

5. The locking assembly according to claim 4, characterized in that, The locking element also includes a gear body and a plurality of teeth evenly arranged on the outer periphery of the gear body. The gear body is connected to the rotating shaft. The teeth are used to mesh with the locking block. The plurality of teeth are evenly and spaced around the axis of the gear body. The locking position is formed between two adjacent teeth. The total distribution range of the locking position on the outer periphery of the gear body is β, where 0°<β≤180°.

6. The locking assembly according to claim 5, characterized in that, The total radian β of the tooth distribution on the gear body is 90°.

7. The locking assembly according to any one of claims 1 to 6, characterized in that, The first structural component is a support component for the headrest, and the second structural component is a headrest or base for the headrest.

8. The locking assembly according to claim 7, characterized in that, The first structural member has a mounting hole, the locking member is disposed in the mounting hole, and at least a portion of the locking block is disposed inside the first structural member, the locking block being able to enter the mounting hole and engage with the locking member.

9. The locking assembly according to claim 7, characterized in that, It also includes a driving component, at least a portion of which is disposed inside the first structural component. The driving component is connected to the locking block and is capable of driving the locking block to move along the predetermined straight line.

10. The locking assembly according to claim 9, characterized in that, It also includes a control element, at least a portion of which is exposed outside the first structural member. The control element is connected to the drive element, and both the control element and the drive element are movable relative to the first structural member. The control element can drive the drive element to move so as to drive the locking block to move along the set straight line.

11. The locking assembly according to claim 10, characterized in that, It also includes an elastic element, which is connected to at least one of the locking block, the driving element, and the control element, and the elastic element always has a tendency to drive the locking block to move toward the locking element.

12. The locking assembly according to claim 11, characterized in that, It also includes a positioning post, which is connected to the driving member, and an elastic member is sleeved on the outer periphery of the positioning post. The end of the elastic member away from the driving member is used to connect with the first structural member.

13. A headrest, characterized in that, The device includes a first structural component, a second structural component, a pivot, and a locking assembly as described in any one of claims 1 to 12. The first structural component is a support component of the headrest, the second structural component is a headrest component of the headrest, the headrest component is used to support the user's head, and the support component is rotatably connected to the headrest component via the pivot.

14. The headrest according to claim 13, characterized in that, The device includes two second structural components, one of which is the headrest and the other is the base of the headrest. It also includes two pivots and two locking assemblies. One end of the support member is rotatably connected to the headrest via one of the pivots, and the other end is rotatably connected to the base via the other pivot. The two locking assemblies are respectively located at the two ends of the support member where the headrest and the base are located. The locking assembly closer to the headrest restricts relative rotation between the support member and the headrest, and the locking assembly closer to the base restricts relative rotation between the support member and the base.

15. The headrest according to claim 14, characterized in that, When the locking assembly includes a control member and a drive member, the drive member is used to drive the locking block to move along the set straight line. The drive members of the two sets of locking assemblies share a control member. The control member abuts against the drive members of the two locking assemblies respectively. The movement of the control member can drive the drive members of the two locking assemblies to move, so as to drive the locking blocks of the two locking assemblies to move towards the locking member in the same locking assembly.

16. The headrest according to claim 15, characterized in that, The control element includes a push block, a knob, and a connecting rod. The push block is disposed inside the support and is rotatably connected to the support. The knob is disposed outside the support. The connecting rod is connected between the push block and the knob. Rotating the knob can drive the push block to rotate through the connecting rod, so that the rotation of the push block can drive the driving elements of the two locking assemblies to move away from each other.

17. The headrest according to claim 16, characterized in that, The driving component includes a first body and a second body connected to the first body. The first body is disposed at one end of the second body near the locking component. The second body includes a first segment and at least one second segment connected to the first segment. The first segment and the second segment are disposed at an angle. The second segment is connected between the first segment and the first body. The first segments of the two locking components are spaced apart and disposed opposite to each other. The pushing block is disposed between the first segments of the two locking components.

18. The headrest according to claim 17, characterized in that, The knob includes a knob body and a decorative cover. The knob body is connected to the connecting rod. The decorative cover is disposed on the outer periphery of the knob body, and the outer periphery of the decorative cover has an anti-slip structure.

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