Folding headrest

Abstract

The present application relates to a folding headrest, which is characterized by comprising: a headrest support; a connecting member passing through two opposite sides of the headrest support, the headrest support and the connecting member being rotatably adjustable with respect to each other; and a damping guide sleeve arranged at a rotary joint between the connecting member and the headrest support, the damping guide sleeve being in interference fit with the connecting member and in limiting connection to the headrest support. The folding headrest according to the present application has the advantages of smooth turning and a small wobble amplitude.

Description

A folding headrest

[0001] This application is based on and claims priority to Chinese Patent Application No. 202421594835.X, filed on July 8, 2024, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

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

[0003] A car headrest is a driving comfort and safety accessory. When resting, the head rests on the car headrest to relieve neck fatigue, and the headrest also provides protection for the vulnerable neck and head.

[0004] However, different drivers have different usage habits, so there are often situations where the headrest needs to be adjusted. The existing car headrests have a gap between the headrest and the pivot, which often causes the headrest to wobble a lot during use or adjustment. This can cause abnormal noise when the headrest is folded, and the large amount of headrest wobble and the fast flipping speed can make the user experience worse. Summary of the Invention

[0005] The purpose of this application is to provide a folding headrest that overcomes at least one deficiency of the prior art. The folding headrest, in particular, reduces the wobbling that occurs when the headrest is rotated, increases comfort during use, and effectively controls the folding speed.

[0006] The technical solution to achieve the above objective is a folding headrest according to this application, the folding headrest comprising:

[0007] Headrest support;

[0008] Connectors are inserted on opposite sides of the headrest bracket, allowing for relative rotational adjustment between the headrest bracket and the connectors; and

[0009] A damping guide sleeve is disposed between the connector and the headrest bracket and is limitedly connected to the headrest bracket. The damping guide sleeve and the connector are interference-fitted so that the damping guide sleeve and the connector produce an interference match.

[0010] Furthermore, the connector passes through the damping guide sleeve, and the inner surface of the damping guide sleeve is provided with a partial protrusion towards the connector, so that the damping guide sleeve and the connector are in an interference fit.

[0011] Furthermore, the protruding structure is a thickened portion of the axial central section of the damping guide sleeve; and / or the protruding structure is an arched portion of the axial central section of the damping guide sleeve; and / or the protruding structure is a raised rib.

[0012] Furthermore, the damping guide sleeve has foldable guide sleeve flanges at both ends. The damping guide sleeve is installed on the headrest bracket. By folding the guide sleeve flanges to be perpendicular to the damping guide sleeve, the damping guide sleeve and the headrest bracket are axially limited and connected.

[0013] Furthermore, the damping guide sleeve and the headrest bracket are connected to resist relative rotation by contacting each other.

[0014] Furthermore, the guide sleeve has multiple stop edges, which are spaced apart along the two ends of the damping guide sleeve.

[0015] Furthermore, the inner surface of the damping guide sleeve has a Teflon (PTFE) coating.

[0016] Furthermore, the damping guide sleeve has a plurality of spaced weakening holes formed in its circumferential direction.

[0017] Furthermore, the damping guide sleeve is disposed on at least one of the two sides of the headrest bracket.

[0018] Furthermore, a left sheet metal is installed on the side of the headrest bracket, and the left sheet metal has a first through section corresponding to the connector;

[0019] The headrest bracket has a right sheet metal installed on the side away from the left sheet metal, and the right sheet metal has a second through section corresponding to the first through section. The connector passes through the first through section and the second through section.

[0020] Furthermore, the headrest support is equipped with a rotatable pawl.

[0021] A first cam is fixedly installed on the connector. The first cam has a plurality of locking slots corresponding to the pawl. By rotating the pawl, the pawl is locked into the corresponding locking slot to fix the headrest bracket.

[0022] Furthermore, the pawl can rotate about its axis of rotation between a position engaged with the first cam and a position disengaged from the first cam.

[0023] Furthermore, a rotatable and adjustable unlocking handle is installed on the side of the headrest bracket, and the unlocking handle controls the connection of the pawl.

[0024] Furthermore, the pawl can be disengaged from the first cam by rotating the unlocking handle.

[0025] In some embodiments, the folding headrest of this application can have the following advantages compared with the prior art:

[0026] 1. By installing a damping guide sleeve between the headrest support and the connector, swaying, especially the swaying that occurs when the headrest rotates, can be reduced;

[0027] 2. By applying a Teflon (PTFE) coating to the damping guide sleeve, the lubrication effect between the damping guide sleeve and the connecting parts can be increased, thereby reducing abnormal noise generated during rotation.

[0028] 3. By setting a damping guide sleeve, the rotation speed of the headrest can be controlled, and the rotation speed is smooth during the rotation process, which can improve the comfort during use.

[0029] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0030] The present application will now be described in more detail with reference to the accompanying drawings and exemplary embodiments. In the drawings:

[0031] Figure 1 is a structural schematic diagram of the folding headrest of this application in its usage state.

[0032] Figure 2 is a structural schematic diagram of a folding headrest in a flipped state according to this application.

[0033] Figure 3 is an exploded structural diagram of an embodiment 1 of the folding headrest of this application.

[0034] Figure 4 is an exploded structural diagram of an embodiment 1 of the folding headrest of this application from another perspective.

[0035] Figure 5 is an overall structural diagram of the damping guide sleeve of a folding headrest according to this application.

[0036] Figure 6 is a cross-sectional view of AA in Figure 5.

[0037] Figure 7 is an exploded view of Embodiment 2 of the folding headrest of this application.

[0038] Figure 8 is an exploded structural diagram of an embodiment 2 of the folding headrest of this application from another perspective.

[0039] Legend: 1. Insert rod; 2. Unlock handle; 3. Damping guide sleeve; 31. Guide sleeve retainer; 32. Weakening hole; 4. Left sheet metal; 5. Connector; 6. Second cam; 7. Pawl; 8. Ratchet shaft; 9. Connecting shaft; 10. Cam spring; 11. First cam; 12. Toothed leaf spring; 13. Right sheet metal; 14. Guide sleeve. Detailed Implementation

[0040] The present application will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] Referring to Figure 1, this application provides a folding headrest, which includes a headrest support, a connector 5, and a damping guide sleeve 3. The connector 5 can pass through the headrest support, allowing for rotatable adjustment between the connector 5 and the headrest support. A damping guide sleeve 3 can be provided at the rotatable connection between the connector 5 and the headrest support. The damping guide sleeve 3 and the headrest support can be limitedly connected or fixed relative to each other, and the damping guide sleeve 3 and the connector 5 can be interference-fitted to create an interference match. Therefore, when the headrest is rotated, the headrest support will rotate along with the damping guide sleeve 3 relative to the connector 5. Because of the interference fit between the damping guide sleeve 3 and the connector 5, the damping guide sleeve 3 and the headrest support will experience a certain resistance when rotating relative to the connector 5, thereby reducing the swaying of the headrest during rotation and improving comfort during use.

[0042] Furthermore, to facilitate rotation, the connector 5 can be a tubular structure.

[0043] Therefore, this application provides a folding headrest that can reduce swaying during rotation. As shown in Figure 2, in use, insert rods 1 can be provided at both ends of the connector 5. By inserting the insert rods 1 into the back of the seat, the folding headrest can be installed, making the installation of the folding headrest convenient.

[0044] Referring to Figures 5 and 6, further, in some embodiments, the damping guide sleeve 3 has an outer surface a and an inner surface b, and the inner surface b of the damping guide sleeve 3 may partially protrude toward the connector 5. After the connector 5 passes through the damping guide sleeve 3, the protruding portion of the damping guide sleeve 3 can fit tightly with the connector 5, so that the damping guide sleeve 3 and the connector 5 have an interference fit.

[0045] Furthermore, in some embodiments, the thickness H1 of the portion of the damping guide sleeve 3 near both ends (see Figure 6, which shows the axial direction of the damping guide sleeve 3, i.e., the two ends in the left-right direction in the figure) can be less than the thickness H2 of the middle protruding portion of the damping guide sleeve. Thickening the middle protruding portion of the damping guide sleeve 3, and thickening it towards the inner surface b, makes the protruding portion of the damping guide sleeve 3 more robust. The through-hole space enclosed by this protruding portion is slightly smaller than the diameter of the connector, which can avoid the problem of difficulty in rotation due to excessive interference between the connector 5 and the damping guide sleeve 3. In other embodiments, the damping guide sleeve 3 can have a substantially uniform thickness, and the axial middle section of the damping guide sleeve 3 can at least partially arch radially inward to form a through-hole space slightly smaller than the diameter of the connector 5.

[0046] In another preferred embodiment, a portion of the inner surface of the damping guide sleeve 3 may protrude towards the connector 5, thus forming a rib. The rib may be spaced apart along the inner surface of the damping guide sleeve 3, or may be arranged in one or more turns or in a spiral pattern. The rib may extend, for example, in the axial direction of the damping guide sleeve 3 or, for example, in the circumferential direction of the damping guide sleeve 3. The rib may also extend in any suitable direction. The rib arrangement allows the damping guide sleeve 3 to fit tightly against the connector 5, providing some resistance to the rotation of the damping guide sleeve 3 without completely restricting its rotational adjustment.

[0047] Furthermore, in some embodiments, the two ends of the damping guide sleeve 3 may have foldable guide sleeve flanges 31. During installation, the damping guide sleeve 3 can be installed onto the headrest bracket, and the guide sleeve flanges 31 can be folded up to be substantially perpendicular to the damping guide sleeve 3, so that the damping guide sleeve 3 and the headrest bracket are axially limited and connected. Specifically, the damping guide sleeve 3 can be inserted into the headrest bracket, and the (axial) ends of the damping guide sleeve 3 are located on the inner and outer sides of the headrest bracket respectively. Then, the guide sleeve flanges 31 can be folded up so that the guide sleeve flanges 31 contact the corresponding inner and outer sides of the headrest bracket, thereby realizing the limited connection between the damping guide sleeve 3 and the headrest bracket. Here, on the one hand, the axial limited connection between the damping guide sleeve 3 and the headrest bracket can be achieved by the contact and friction between the damping guide sleeve 3 and the headrest bracket, together with the guide sleeve flanges 31. Preferably, in some embodiments, the headrest support may be provided with a connection hole, and the damping guide sleeve 3 may be embedded in the connection hole. Specifically, the outer surface a of the damping guide sleeve 3 may contact the wall of the connection hole of the headrest support, and the two ends of the damping guide sleeve 3 may be located on both sides of the connection hole. After folding the guide sleeve retaining edge 31, the guide sleeve retaining edge 31 may abut against the connection hole of the headrest support, especially its end face, so that the damping guide sleeve 3 is fixedly connected to the headrest support.

[0048] Preferably, in some embodiments, the guide sleeve baffle 31 can be provided on both ends of the damping guide sleeve 3. At the initial installation, the guide sleeve baffle 31 can be in a horizontal position (at this time, the guide sleeve baffle 31 can be substantially flush with the peripheral wall of the damping guide sleeve 3) so as to pass through the connecting hole on the headrest bracket, and then the guide sleeve baffle 31 can be folded into a vertical position (at this time, the guide sleeve baffle 31 can be substantially perpendicular to the peripheral wall of the damping guide sleeve 3).

[0049] Furthermore, in some embodiments, multiple guide sleeve flanges 31 may be provided. Multiple guide sleeve flanges 31 may be spaced apart along the two end edges of the damping guide sleeve 3, particularly spaced apart in the circumferential direction. Folding the guide sleeve flanges 31 so that they fit against the side of the headrest bracket can better limit the position of the damping guide sleeve 3.

[0050] Furthermore, in some embodiments, the inner surface of the damping guide sleeve 3 may have, for example, a Teflon (PTFE) coating. This Teflon coating can act as a lubricant, thereby preventing abnormal noise or uneven rotation of the connector 5 when it rotates within the damping guide sleeve 3.

[0051] Furthermore, in some embodiments, a plurality of weakening holes 32 spaced apart can be formed on the circumferential direction of the damping guide sleeve 3. When the connector 5 passes through the damping guide sleeve 3, the protruding portion of the damping guide sleeve 3 can be squeezed, and the formation of the weakening holes 32 facilitates the deformation of the damping guide sleeve 3.

[0052] Furthermore, in some embodiments, the damping guide sleeve 3 may be disposed on at least one of the two sides of the headrest bracket.

[0053] In a preferred embodiment, two damping guide sleeves 3 can be provided. The damping guide sleeves 3 are respectively provided in the rotatable connection points with the connectors 5 on opposite sides of the headrest bracket. The connectors 5 can be inserted into the two damping guide sleeves 3.

[0054] Referring to Figures 7 and 8, in another preferred embodiment: a damping guide sleeve 3 can be provided. The damping guide sleeve 3 can be provided in the rotatable connection between the headrest bracket and the connector 5 on one side. A common guide sleeve 14 can be used in the rotatable connection on the other side of the headrest bracket. The connector 5 can be inserted into the damping guide sleeve 3 and the guide sleeve 14.

[0055] Referring to Figures 1 to 4, in some embodiments, the headrest support may include a left sheet metal 4 and a right sheet metal 13 disposed opposite to the left sheet metal 4. The left sheet metal 4 may have a first through-section corresponding to the connecting member 5; the right sheet metal 13 may have a second through-section corresponding to the first through-section. The connecting member 5 may pass through the first through-section and the second through-section.

[0056] The first and second through sections can be tubular, and their dimensions can be adapted to the dimensions of the damping guide sleeve 3. The damping guide sleeve 3 can be embedded in the first and second through sections, and the guide sleeve flanges 31 provided at both ends can be located at the corresponding ends of the first and second through sections.

[0057] Furthermore, in some embodiments, both ends of the damping guide sleeve 3 may be provided with guide sleeve flanges 31. For example, when installing the damping guide sleeve 3 in the first or second through section, one side of the guide sleeve flange 31 can be flipped up to be perpendicular to the damping guide sleeve 3, and the damping guide sleeve 3 can be inserted into the first or second through section. The flipped guide sleeve flange 31 is attached to the end of the first or second through section. Then, the other side of the guide sleeve flange 31 is folded up and attached to the other end of the first or second through section to limit the installation of the damping guide sleeve 3 in the left sheet metal 4 or right sheet metal 13.

[0058] Furthermore, in some embodiments, the damping guide sleeve 3 and the guide sleeve flange 31 can be integrally formed structures.

[0059] Furthermore, as shown in Figures 3 and 4, in some embodiments, a rotatable pawl 7 can be provided inside the headrest bracket, and a first cam 11 can be fixedly installed on the connector 5. The first cam 11 can form a plurality of locking slots corresponding to the pawl 7. By rotating the pawl 7, the pawl 7 can be locked in the corresponding locking slot to fix the headrest bracket.

[0060] Furthermore, in some embodiments, a ratchet shaft 8 may be provided between the left sheet metal 4 and the right sheet metal 13, on which the pawl 7 is fixedly mounted. The ratchet shaft 8 can limit the axis of rotation of the pawl 7. The pawl 7 can rotate about its axis of rotation between a position engaged with the first cam 11 and a position disengaged from the first cam 11.

[0061] Furthermore, in some embodiments, a rotatable and adjustable unlocking handle 2 can be installed on the side of the headrest bracket, the unlocking handle 2 controlling the connecting pawl 7.

[0062] Furthermore, in some embodiments, a connecting shaft 9 may be provided between the left sheet metal 4 and the right sheet metal 13. This connecting shaft 9 extends partially beyond the left sheet metal 4 and the right sheet metal 13 to form an operating section, on which an unlocking handle 2 is fixedly mounted. A second cam 6 may be provided, and particularly fixed, on the connecting shaft 9, with its end operably connected to a pawl 7. When the unlocking handle 2 rotates, it drives the connecting shaft 9 to rotate, causing the second cam 6 to disengage the pawl 7 from its locking groove, thus unlocking the headrest bracket and the connecting member 5, allowing the headrest bracket to be folded and adjusted.

[0063] Furthermore, a cam spring 10 can be provided on the connecting shaft 9. After the headrest bracket is folded and adjusted, for example, when the unlocking handle 2 is released, the cam spring 10 can cause the shaft 9 and the second cam 6 to rotate and reset, so that the second cam 6 can drive the pawl 7 to re-lock into the corresponding locking groove, thereby locking the relative position of the headrest bracket and the connecting piece 5.

[0064] Furthermore, a toothed leaf spring 12 can be fitted onto the connector 5. One end of the toothed leaf spring 12 can be connected to the first cam 11 fixed to the connector 5, and the other end of the toothed leaf spring 12 can be connected to the headrest bracket. The toothed leaf spring 12 can be used to offset the headrest bracket towards its initial position relative to the connector 5. When the pawl 7 disengages from the first cam 11, the toothed leaf spring 12 can be used to automatically reset the headrest bracket towards its initial position relative to the connector 5.

[0065] It should be noted that the terminology used herein is for illustrative purposes only and is not intended to limit the disclosure. The singular forms “a” and “the one” as used herein should include the plural forms unless the context explicitly states otherwise. It is understood that the terms “comprising” and “including,” and other similar terms, when used in the application documents, specifically describe the presence of the stated operation, element, and / or component, without excluding the presence or addition of one or more other operations, elements, components, and / or combinations thereof. The term “and / or” as used herein includes all arbitrary combinations of one or more of the associated listed items. In the description of the drawings, similar reference numerals always denote similar elements.

[0066] The thickness of the elements in the accompanying drawings may be exaggerated for clarity. It is also understood that if an element is described as being on, coupled to, or connected to another element, then the element may be directly formed on, coupled to, or connected to the other element, or there may be one or more intermediate elements between them. Conversely, if the expressions "directly on," "directly coupled to," and "directly connected to" are used herein, it indicates that there is no intermediate element. Other terms used to describe relationships between elements should be interpreted similarly, such as "between" and "directly between," "attached" and "directly attached," "adjacent" and "directly adjacent," etc.

[0067] Terms such as “top,” “bottom,” “above,” “below,” “over,” “under,” etc., are used to describe the relationship of one element, layer, or region relative to another element, layer, or region, as shown in the accompanying drawings. It is understood that these terms should also encompass other orientations of the device in addition to those described in the accompanying drawings.

[0068] It is understood that although the terms "first," "second," etc., may be used herein to describe different elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from another. Therefore, a first element may be referred to as a second element without departing from the teachings of the inventive concept of this application.

[0069] It can also be considered that all the exemplary embodiments disclosed herein can be arbitrarily combined with each other.

[0070] The present application has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present application based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present application, and the scope of protection of the present application shall be defined by the appended claims.

Claims

1. A folding headrest, characterized in that, The folding headrest includes: Headrest support; Connectors (5) are inserted on opposite sides of the headrest bracket, allowing the headrest bracket and the connectors (5) to rotate and adjust relative to each other; and A damping guide sleeve (3) is provided at the rotatable connection between the connector (5) and the headrest bracket. The damping guide sleeve (3) and the connector (5) are interference-fitted. The damping guide sleeve (3) is limitedly connected to the headrest bracket.

2. The folding headrest according to claim 1, characterized in that: The connector (5) passes through the damping guide sleeve (3), and the inner surface of the damping guide sleeve (3) is provided with a partial protrusion facing the connector (5) so that the damping guide sleeve (3) and the connector (5) are interference fit.

3. The folding headrest according to claim 2, characterized in that: The protruding structure is a thickened portion of the axial central section of the damping guide sleeve (3); and / or the protruding structure is an arched portion of the axial central section of the damping guide sleeve; and / or the protruding structure is a rib.

4. The folding headrest according to any one of claims 1 to 3, characterized in that: The damping guide sleeve (3) has foldable guide sleeve baffles (31) at both ends. The guide sleeve baffles (31) are folded and then come into contact with the headrest bracket to achieve axial limiting connection between the damping guide sleeve (3) and the headrest bracket.

5. The folding headrest according to claim 4, characterized in that: The damping guide sleeve (3) and the headrest bracket are connected to resist relative rotation by contacting each other.

6. The folding headrest according to claim 4 or 5, characterized in that: Multiple guide sleeve baffles (31) are provided, and the multiple guide sleeve baffles (31) are spaced apart along the two ends of the damping guide sleeve (3).

7. The folding headrest according to any one of claims 1 to 6, characterized in that: The inner surface of the damping guide sleeve (3) has a Teflon coating.

8. The folding headrest according to any one of claims 1 to 7, characterized in that: The damping guide sleeve (3) has a plurality of weakening holes (32) spaced apart in the circumferential direction.

9. The folding headrest according to any one of claims 1 to 8, characterized in that: The damping guide sleeve (3) is disposed on at least one of the two sides of the headrest bracket.

10. The folding headrest according to any one of claims 1 to 9, characterized in that: The headrest support includes a left sheet metal (4), and the left sheet metal (4) has a first through section corresponding to the connector (5); The headrest bracket also includes a right sheet metal (13) disposed opposite to the left sheet metal (4), the right sheet metal (13) having a second through section corresponding to the first through section, and the connector (5) passing through the first through section and the second through section.

11. The folding headrest according to any one of claims 1 to 10, characterized in that: The headrest support is equipped with a rotatable pawl (7); A first cam (11) is fixedly installed on the connector (5). The first cam (11) has a plurality of locking slots corresponding to the pawl (7). By rotating the pawl (7), the pawl (7) is locked in the corresponding locking slot to fix the headrest bracket.

12. The folding headrest according to claim 11, characterized in that: The pawl (7) can rotate about its axis of rotation between a position engaged with the first cam (11) and a position disengaged from the first cam (11).

13. The folding headrest according to claim 11 or 12, characterized in that: The headrest bracket has a rotatable and adjustable unlocking handle (2) installed on its side, which controls the connection of the pawl (7).

14. The folding headrest according to claim 13, characterized in that: The pawl (7) can be disengaged from the first cam (11) by rotating the unlocking handle (2).

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