Seat headrest adjustment mechanism

Abstract

The utility model relates to a kind of seat headrest adjusting mechanism, to effectively solve the locking safety problem of headrest while meeting appearance effect. The mechanism includes: for connecting to the guide sleeve of seat backrest;For connecting to the plug rod of seat headrest, the plug rod can slide in the guide sleeve in first direction, and is provided with the locking slot extending perpendicularly to the first direction;Top cover, the top cover is set on the top of seat backrest, for covering the guide sleeve, and the top cover has appearance surface inclined relative to the first direction;Unlock button, the unlock button is movably arranged on the guide sleeve along second direction, and includes operating part and locking part;And locking piece, the locking piece is connected to the locking part, and can be moved by the unlock button between the locking position kept in the locking slot and the unlocking position separated from the locking slot.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle seat parts. More specifically, this utility model relates to a seat headrest adjustment mechanism. Background Technology

[0002] Currently, an increasing number of vehicle seats include adjustable headrests. Specifically, a guide sleeve is connected to the seat back, and a rod is connected to the headrest, with a locking groove on the rod. When the locking element of the adjustment mechanism is held in the locking groove, the rod is locked in the guide sleeve. When the locking element is released from the locking groove by pressing the unlock button, the rod can slide in the guide sleeve to adjust the height of the headrest or to remove the headrest from the seat back.

[0003] like Figures 1A to 1C As shown, a drawback of existing headrest adjustment mechanisms on the market is that, since the top surface S of the backrest BR generally forms an acute angle α with the axial direction of the insert rod 10 (i.e., the sliding direction of the insert rod 10), in order to make the top surface S of the backrest BR, the top cover 1 of the adjustment mechanism, and the unlocking button 8 have a harmonious appearance, the arrangement angle of the locking groove 1001 on the insert rod 10 and the corresponding locking element (e.g., the stop pin) is close to the angle of the top surface S of the backrest BR. That is, the extension direction of the locking groove 1001 also forms an acute angle α with the axial direction of the insert rod 10. However, this design leads to unstable locking effect. For example, the headrest is prone to lose locking and fly outwards during dynamic impact tests, causing the test to fail. The main reason for the failure is that, since the extension direction of the locking groove 1001 is not perpendicular to the axial direction of the insert rod 10, the insert rod 10 will be torsional under the component force during dynamic tests, which will cause the locking element to disengage from the locking groove 1001, resulting in the headrest flying out. Utility Model Content

[0004] The purpose of this invention is to provide an improved headrest adjustment mechanism that can effectively solve the headrest locking safety problem while achieving a good aesthetic effect.

[0005] To address this, the present invention provides a seat headrest adjustment mechanism, comprising: a guide sleeve for connecting to a seat back; a plug for connecting to a seat headrest, the plug being slidable within the guide sleeve along a first direction and having a locking groove extending perpendicular to the first direction; a top cover disposed on the top of the seat back for covering the guide sleeve, and the top cover having an external surface inclined relative to the first direction; an unlock button movably disposed on the guide sleeve along a second direction and including an operating part and a locking part; and a locking member connected to the locking part and movable by the unlock button between a locked position held within the locking groove and an unlocked position separated from the locking groove.

[0006] Based on the above technical concept, the present invention may further include any one or more of the following optional forms.

[0007] In some alternative configurations, the outer surface of the operating part is substantially flush with the outer surface of the top cover.

[0008] In some alternative forms, the unlock button further includes a connecting portion comprising a main body and a transition portion. The main body is connected to the locking portion and has a flat shape extending perpendicular to the first direction. The transition portion protrudes from the main body and has a top surface substantially parallel to the outer surface of the top cover. The operating portion is connected to the transition portion.

[0009] In some alternative versions, the seat headrest adjustment mechanism further includes a support block disposed below the unlock button, the support block being connected to the guide sleeve and having a support surface substantially parallel to the outer surface of the top cover, such that the operating part is adapted to slide along the support surface.

[0010] In some alternative forms, the guide sleeve includes a first receiving cavity, and at least a portion of the support block is positioned within the first receiving cavity and engages with the guide sleeve.

[0011] In some alternative forms, the guide sleeve includes a second receiving cavity that is shaped to match the locking portion and the connecting portion, such that the locking portion and the connecting portion are adapted to slide within the second receiving cavity along the second direction.

[0012] In some alternative forms, the first direction is perpendicular to the second direction.

[0013] In some alternative configurations, the locking element is integrally connected to or detachably connected to the unlocking button.

[0014] In some alternative forms, the locking element is a stop pin, the stop pin having a generally rectangular cross-section.

[0015] In some alternative forms, the locking portion and the main body portion form a through hole through which the insertion rod passes, and a portion of the locking member is located within the through hole.

[0016] In some alternative versions, the seat headrest adjustment mechanism further includes a spring, one end of which abuts against the guide sleeve and the other end of which abuts against the unlock button to provide an elastic force suitable for pushing the unlock button toward the locked position.

[0017] In some alternative configurations, the top cover engages with the guide sleeve.

[0018] Compared with the prior art, the seat headrest adjustment mechanism according to this utility model has several beneficial technical effects, especially: while ensuring the appearance effect, that is, when the appearance surface of the top cover is tilted relative to the sliding direction of the insert rod, the extension direction of the locking groove is set to be perpendicular to the sliding direction of the insert rod. In this way, even if the insert rod is twisted during the dynamic test of the headrest, the locking member can be effectively locked with the locking groove, thus ensuring the locking safety of the headrest. Attached Figure Description

[0019] Other features and advantages of this invention will be better understood through the following detailed description of preferred embodiments in conjunction with the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts.

[0020] Figure 1A and Figure 1B These are schematic diagrams from different perspectives of the top of the seat back with a headrest adjustment mechanism in existing technologies.

[0021] Figure 1C This is an assembly diagram of the lever and unlock button of the adjustment mechanism in the prior art.

[0022] Figure 2 This is an exploded view of a seat headrest adjustment mechanism according to one embodiment of the present invention, wherein the insert rod is not shown.

[0023] Figure 3A and Figure 3B These are three-dimensional views of the guide sleeve of the adjustment mechanism from different perspectives.

[0024] Figure 4 This is a three-dimensional view of the support block of the adjustment mechanism.

[0025] Figure 5A and Figure 5B These are 3D views of the unlock button of the adjustment mechanism from different perspectives.

[0026] Figure 6 This is a partial 3D view of the top cover of the adjustment mechanism.

[0027] Figure 7A and Figure 7B These are assembly diagrams of the lever and unlock button of the adjustment mechanism from different perspectives.

[0028] Figure 8A and Figure 8B These are schematic diagrams of the adjustment mechanism before and after the support block is installed.

[0029] Figure 9 This is a schematic diagram showing the assembly of the adjustment mechanism with the seat back.

[0030] Figure 10A and Figure 10B These are schematic diagrams showing the locking and unlocking positions of the adjustment mechanism's unlock button.

[0031] The elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to precise scale or shape. It should be understood that the drawings are not only used for explanation and illustration of the present invention, but also, where necessary, to limit the present invention. Detailed Implementation

[0032] The implementation and use of specific embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of particular ways of implementing and using this utility model, and are not intended to limit the scope of this utility model.

[0033] In this specification, the descriptions of structural positions, such as up, down, top, and bottom, are not absolute but relative. For example, these descriptions are appropriate when the components are arranged as shown in the figure, but they should be changed accordingly when the positions of the components change.

[0034] A preferred embodiment of the seat headrest adjustment mechanism according to the present invention will now be described with reference to the accompanying drawings.

[0035] like Figure 2 As shown, the seat headrest adjustment mechanism according to this utility model mainly includes a top cover 1, a guide sleeve 5, and a plug rod 10 (see reference). Figures 7A to 10B The guide sleeve 5 includes an unlock button 8, a support block 11, and a locking element for locking the insert rod 10. It is understood that there are generally two guide sleeves and insert rods; for convenience, this specification and accompanying drawings describe only one set of guide sleeves and insert rods as an example, while the other set may have the same or similar construction. The guide sleeve 5 is used to connect to the interior of the seat back, for example, to be fixedly connected to the upper crossbeam of the seat back. The insert rod 10, used to connect to the seat headrest, can slide in the guide sleeve 5 along a first direction (i.e., the axial direction of the insert rod 10) and is provided with a plurality of locking grooves 1001 extending perpendicular to the first direction (see reference). Figure 7A ).

[0036] The top cover 1 has a hole 102 through which the insertion rod 10 passes, and a notch 103 on one side for accommodating the unlocking button 8. The top cover 1 is located on top of the seat back and serves to cover and connect to the guide sleeve 5 from above for aesthetic purposes; the top surface of the top cover 1 forms the visible exterior surface inside the vehicle. To match the shape of the top surface of the seat back, the exterior surface of the top cover 1 is inclined relative to a first direction. It is understood that the exterior surface of the top cover 1 is not necessarily completely flat; it may have a certain curvature or a downwardly extending flange.

[0037] The unlock button 8 is movably disposed on the guide sleeve 5 along a second direction. In the illustrated embodiment, the second direction is perpendicular to the first direction. For example, the second direction is the vehicle width direction (i.e., the Y-direction of the vehicle) perpendicular to the axial direction of the insert 10, to facilitate easier pushing operation by the operator.

[0038] like Figure 2 , Figure 5A and Figure 5B As shown, the unlock button 8 includes an operating part 801, a locking part 803, and a connecting part 802 connecting the operating part 801 and the locking part 803. The locking part 803 has, for example, a generally U-shaped flat shape extending perpendicular to a first direction, for the insertion rod 10 to pass through, and is provided with a mounting hole 804. The connecting part 802 includes a main body 808 and a transition part 806. The main body 808 is connected to the locking part 803 and also has a flat shape extending perpendicular to the first direction. The locking part 803 and the main body 808 form a through hole 809 for the insertion rod 10 to pass through. The transition part 806 has a generally wedge-shaped shape protruding upward from the main body 808 and has a top surface that is generally parallel to the outer surface of the top cover 1. The operating part 801 is connected to the transition part 806 so that the operator can push the unlock button 8 to move in a second direction, and the outer surface of the operating part 801 is generally flush with the outer surface of the top cover 1. Furthermore, a plurality of protruding ribs 807 are provided below the operating part 801, extending from the adapter part 806. In other words, the adapter part 806 constitutes an angle conversion feature of the unlock button 8, causing the thickness of the unlock button 8 to change in the second direction.

[0039] The locking element of the adjustment mechanism is, for example, a stop pin 7 made of metal. This stop pin 7 passes perpendicularly to the second direction through the mounting hole 804 of the locking portion 803 and is detachably inserted into the mounting hole 804, for example, by an interference fit. A portion of the stop pin 7 is located within a through hole 809, allowing it to be moved by the unlocking button 8 between a locked position held within the locking groove 1001 and an unlocked position separated from the locking groove 1001. In the locked position, the insert 10 is locked onto the guide sleeve 5 and cannot slide relative to it. In the unlocked position, the insert 10 can slide relative to the guide sleeve 5, allowing the operator to adjust or remove the headrest. Preferably, the stop pin 7 has a generally rectangular cross-section to increase the contact area with the locking groove 1001. It is understood that the stop pin 7 can also be integrally connected to the locking portion 803, for example, by insert molding.

[0040] like Figure 2 , Figure 3A and Figure 3BAs shown, the guide sleeve 5 includes an axially extending portion 51 extending along a first direction for sliding of the insertion rod 10, and a radially extending portion 52 protruding radially from the axially extending portion 51. The radially extending portion 52 includes a base plate 508, a top plate 510 inclined relative to the base plate 508, and an intermediate plate 509 located between the base plate 508 and the top plate 510 and parallel to the base plate 508. A first receiving cavity is formed between the base plate 508 and the intermediate plate 509, and a second receiving cavity is formed between the top plate 510 and the intermediate plate 509. The second receiving cavity is shaped to match the connecting portion 802 and the locking portion 803 of the unlock button 8. By pushing the operating portion 801 of the unlock button 8, the connecting portion 802 and the locking portion 803 of the unlock button 8 can slide in the second receiving cavity along a second direction.

[0041] A support block 11 is positioned below the unlock button 8, and at least a portion of the support block 11 is located within the first receiving cavity and connected to the guide sleeve 5, thereby preventing the unlock button 8 from detaching from the guide sleeve 5. More specifically, as Figure 2 and Figure 4 As shown, the support block 11 includes a fixing part 1101, a support part 1103, and a connecting part 1102 connecting the fixing part 1101 and the support part 1103. The fixing part 1101 has a flat shape extending perpendicular to the first direction to be able to be inserted into the first receiving cavity. The end of the fixing part 1101 is provided with two hooks 1104, and the guide sleeve 5 is provided with two engaging surfaces 511 that engage with the two hooks 1104. The support part 1103 has a flat shape that is inclined relative to the fixing part 1101, and the top surface of the support part 1103 forms a support surface that is substantially parallel to the outer surface of the top cover 1. The operating part 801 of the unlock button 8 is supported on the support surface and can slide on the support surface in the second direction.

[0042] like Figure 2 As shown, the unlock button 8 also includes two guide posts 805 protruding from the connecting part 802 along a second direction on both sides of the locking part 803, and the adjustment mechanism also includes two springs 6 respectively sleeved on the two guide posts 805, with one end of each spring 6 abutting against the connecting part 802 and the other end abutting against the inner abutting surface of the guide sleeve 5. Therefore, when the operator pushes the operating part 801 along the second direction to unlock the headrest, the spring 6 provides an elastic force opposite to the pushing force, and this elastic force can push the unlock button 8 back to the locked position when the operator releases the operating part 801.

[0043] like Figure 6As shown, the top cover 1 is preferably positioned and engaged with the guide sleeve 5 by means of positioning and snap-fitting elements at its bottom. For example, the radial extension 52 of the guide sleeve 5 is provided with positioning holes and snap-fitting holes (not shown), and the bottom of the top cover 1 is provided with positioning pins 106 and snap fasteners 107 that are respectively inserted into the positioning holes and snap-fitting holes along a first direction. In addition, the edge of the top cover 1 is preferably provided with a first snap-fitting piece 104 and a second snap-fitting piece 105 that are opposite to each other, and the radial extension 52 of the guide sleeve 5 is provided with a first limiting surface 512 and a second limiting surface 513 that are respectively engaged with the first snap-fitting piece 104 and the second snap-fitting piece 105 (see reference). Figure 3A and Figure 3B It is understood that the top cover 1 can have various shapes according to appearance requirements, such as circular, elliptical, polygonal, etc., and this utility model does not limit it in this respect.

[0044] The seat headrest unlocking mechanism of this utility model is particularly suitable for situations where the shape and angle of the unlocking button 8 vary depending on the shape of the seat back BR. More specifically, as... Figure 7A , Figure 7B and Figure 9 As shown, when the top surface S of the backrest BR and the outer surface of the top cover 1 are inclined relative to the axial direction of the insert rod 10 (i.e. forming an acute angle α with the axial direction of the insert rod 10), by providing an unlocking button 8 with an angle conversion feature (i.e., a transition part 806), it is not only possible to ensure that the operating part 801 of the unlocking button 8 is consistent with the appearance of the top surface S of the backrest BR and the outer surface of the top cover 1 in terms of appearance, but also to ensure that the extension direction of the locking part 803 of the unlocking button 8, the stop pin 7, and the locking groove 1001 on the insert rod 10 is perpendicular to the axial direction of the insert rod 10, so as to achieve optimal locking strength.

[0045] In addition, such as Figure 8A , Figure 8B , Figure 10A and Figure 10B As shown, by setting the support block 11, not only can the exposed rib 807 on the unlock button 8 be avoided, which would result in poor appearance, but the support block 1103 can also provide a support plane for the operation part 801 when the operator pushes the operation part 801 of the unlock button 8 to move from the locked position to the unlock position in the second direction, making the installation and movement of the unlock button 8 more stable.

[0046] It should be noted that the present invention (e.g., a utility model concept, etc.) has been described in the specification and / or illustrated in the figures of this patent document according to exemplary embodiments; the embodiments of the present invention are presented by way of example only and are not intended to limit the scope of the present invention. The structure and / or arrangement of the elements of the utility model concept embodied in the present invention as described in the specification and / or illustrated in the figures are merely illustrative. Although exemplary embodiments of the present invention have been described in detail in this patent document, it will be readily understood by those skilled in the art that equivalents, modifications, variations, etc., of the subject matter of the exemplary and alternative embodiments are possible and are considered to be within the scope of the present invention; all such subject matter (e.g., modifications, variations, embodiments, combinations, equivalents, etc.) are intended to be included within the scope of the present invention. It should also be noted that various other modifications, variations, substitutions, equivalents, alterations, omissions, etc., may be made in the configuration and / or arrangement of the exemplary embodiments (e.g., in terms of concept, design, structure, device, form, assembly, construction, means, function, system, process / method, steps, sequence of process / method steps, operation, operating conditions, performance, materials, composition, combination, etc.) without departing from the scope of this utility model; all such subject matter (e.g., modifications, variations, embodiments, combinations, equivalents, etc.) is intended to be included within the scope of this utility model. The scope of this utility model is not intended to be limited to the subject matter (e.g., details, structure, function, materials, behavior, steps, sequence, system, result, etc.) described in the specification and / or figures of this patent document. Considering that the claims of this patent document will be properly interpreted to cover the full scope of the subject matter of this utility model (e.g., including any and all such modifications, variations, embodiments, combinations, equivalents, etc.); it should be understood that the terminology used in this patent document is for the purpose of providing a description of the subject matter of exemplary embodiments and not as a limitation on the scope of this utility model.

[0047] It should also be noted that, according to exemplary embodiments, the present invention may include conventional techniques (e.g., techniques implemented and / or integrated in exemplary embodiments, modifications, variations, combinations, equivalents, etc.), or may include any other applicable techniques (now and / or in the future) with the ability to perform the functions and processes / operations described in the specification and / or illustrated in the figures. All such techniques (e.g., techniques implemented in the manner of embodiments, modifications, variations, combinations, equivalents, etc.) are considered to be within the scope of the present invention in this patent document.

Claims

1. A seat headrest adjustment mechanism, characterized in that, include: Guide sleeve for connecting to the seat back; A plug for connecting to a seat headrest, the plug being slidable within the guide sleeve in a first direction and having a locking groove extending perpendicular to the first direction; A top cover, which is disposed on the top of the seat back to cover the guide sleeve, and the top cover has an exterior surface that is inclined relative to the first direction; An unlock button is movably disposed on the guide sleeve along a second direction and includes an operating part and a locking part; as well as A locking member is connected to the locking part and is movable by the unlocking button between a locked position held in the locking groove and an unlocked position separated from the locking groove.

2. The seat headrest adjustment mechanism according to claim 1, characterized in that, The outer surface of the operating part is approximately flush with the outer surface of the top cover.

3. The seat headrest adjustment mechanism according to claim 1, characterized in that, The unlock button further includes a connecting portion comprising a main body and a connecting portion. The main body is connected to the locking portion and has a flat shape extending perpendicular to the first direction. The connecting portion protrudes from the main body and has a top surface that is substantially parallel to the outer surface of the top cover. The operating portion is connected to the connecting portion.

4. The seat headrest adjustment mechanism according to claim 1, characterized in that, The seat headrest adjustment mechanism also includes a support block disposed below the unlock button. The support block is connected to the guide sleeve and has a support surface that is substantially parallel to the outer surface of the top cover, so that the operating part is adapted to slide along the support surface.

5. The seat headrest adjustment mechanism according to claim 4, characterized in that, The guide sleeve includes a first receiving cavity, and at least a portion of the support block is positioned within the first receiving cavity and engages with the guide sleeve.

6. The seat headrest adjustment mechanism according to claim 3, characterized in that, The guide sleeve includes a second receiving cavity, which is shaped to match the locking portion and the connecting portion, such that the locking portion and the connecting portion are adapted to slide in the second receiving cavity along the second direction.

7. The seat headrest adjustment mechanism according to claim 1, characterized in that, The first direction is perpendicular to the second direction.

8. The seat headrest adjustment mechanism according to claim 1, characterized in that, The locking element is integrally connected to the locking part or can be detachably connected.

9. The seat headrest adjustment mechanism according to claim 8, characterized in that, The locking element is a stop pin, and the cross-section of the stop pin has a generally rectangular shape.

10. The seat headrest adjustment mechanism according to claim 3, characterized in that, The locking part and the main body part form a through hole through which the insertion rod passes, and a portion of the locking member is located within the through hole.

11. The seat headrest adjustment mechanism according to claim 1, characterized in that, The seat headrest adjustment mechanism also includes a spring, one end of which abuts against the guide sleeve and the other end of which abuts against the unlock button to provide an elastic force suitable for pushing the unlock button toward the locked position.

12. The seat headrest adjustment mechanism according to claim 1, characterized in that, The top cover engages with the guide sleeve.

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