A buckle, a detachable headrest, and a headrest back plate assembly

Abstract

The application belongs to the technical field of seat structure, and particularly relates to a buckle, a detachable headrest and a headrest back plate assembly. The structure of the buckle comprises a fixed frame body unit for clamping the upper surface, the front surface and the back surface of the upper horizontal bar of the back plate, a bottom front extension plate arranged on the fixed frame body unit, and a limiting frame body unit arranged on the bottom front extension plate and used for clamping the lower surface and the front surface of the upper horizontal bar of the back plate. The application has at least the following beneficial effects: the buckle is open, and can fully clamp the upper surface, the lower surface, the front surface and the back surface of the upper horizontal bar of the back plate, so that the dual advantages of installation stability and convenience of establishing and releasing the buckling state can be realized on the upper horizontal bar of the back plate, and the installation requirements of the detachable headrest of the seat are met.

Description

Technical Field

[0001] This application belongs to the field of seat structure technology, and particularly relates to a snap-fit ​​component, a detachable headrest, and a headrest back panel assembly. Background Technology

[0002] Commonly available headrest accessories for seats mainly consist of a mounting section and a head and neck support section. The mounting section connects to the seat back panel, while the head and neck support section directly supports the user. Typically, the mounting section and the head and neck support section are hinged, and the main support surface of the head and neck support section is made of leather or mesh fabric.

[0003] On the other hand, to ensure sufficient installation stability between the mounting section and the seat back panel, the connection method is mainly screw-in. However, the screw-in connection method requires special tools for both establishing and disengaging, thus its practicality is relatively poor.

[0004] Furthermore, while ensuring sufficient stability of the aforementioned connection methods, various new headrest structures for chairs that do not require bolts, screws, or other parts have emerged. For example, utility model patent CN220308740U, with an authorization announcement date of January 9, 2024, discloses a quick-release office chair headrest, whose main structural components include: a connecting seat, a connecting cavity, a connecting plate, a limiting hole, a limiting rod, a telescopic column, a spring, and a movable plate.

[0005] The headrest in this utility model patent has the following functions and advantages: when the headrest needs to be disassembled for cleaning, only external force needs to be applied to the movable plate to move it, thereby separating the limiting rod from the limiting hole, which can release the fixed state of the headrest and facilitate operation.

[0006] However, in actual use, this headrest still has the following shortcomings in practicality, specifically:

[0007] The way the limiting hole and the limiting rod are connected is essentially similar to a screw connection. The overall structure is still relatively complex, which increases the difficulty of production and the complexity of use. The above-mentioned release action still requires the cooperation of both hands, so its practicality and convenience are relatively low. Utility Model Content

[0008] This application provides a snap-fit ​​component, the technical problem to be solved by which the connection between the detachable headrest and the seat back panel has the dual advantages of sufficient stability and convenient disassembly and assembly, such as being able to be disassembled and assembled with one hand.

[0009] In addition, this application also provides a detachable headrest including the above-mentioned fasteners and a headrest back panel assembly including the above-mentioned fasteners.

[0010] The technical solution adopted by this application to solve the above problems is: a buckle, the structure of which includes a fixing frame unit for engaging the upper surface, front and back of the crossbar on the back plate, a bottom front-facing extension plate disposed on the fixing frame unit, and a limiting frame unit disposed on the bottom front-facing extension plate and for engaging the lower surface and front of the crossbar on the back plate.

[0011] A further preferred technical solution is that the fixed frame unit includes a transverse connecting plate disposed on the upper surface of the crossbar on the back plate, an anti-tilting limiting block disposed on the transverse connecting plate and protruding downwards for engaging the front of the crossbar on the back plate, and an anti-tilting limiting plate disposed on the transverse connecting plate and having the bottom front-facing extension plate for engaging the back of the crossbar on the back plate.

[0012] A further preferred technical solution is that the limiting frame unit includes a vertical locking plate disposed on the bottom front extension plate and used to lock the lower surface of the crossbar on the back plate, and a limiting block for the installation endpoint disposed on the vertical locking plate and used to lock the front of the crossbar on the back plate.

[0013] A further preferred technical solution is that the limiting frame unit further includes a supplementary limiting transition plate disposed on the vertical locking plate and connected to the anti-tilting limiting plate, and used to lock the back of the horizontal bar on the back plate.

[0014] A further preferred technical solution is that: the number of anti-tilt limiting blocks is 2, which are respectively set at both ends of the transverse connecting plate.

[0015] A further preferred technical solution is that the number of the limiting frame units is two, which are respectively set at both ends of the bottom front extension plate.

[0016] A detachable headrest including the aforementioned buckle, the structure further includes a headrest connecting rod disposed on the upper surface of the fixed frame unit and having a length ≤10cm.

[0017] A further preferred technical solution includes: a hinged transverse cylinder disposed on the headrest connecting rod; a tension neck rotating plate disposed on the hinged transverse cylinder and used to tilt and press down the fixed frame unit; and a mounting transverse shaft disposed on the tension neck rotating plate and inserted into the hinged transverse cylinder.

[0018] A headrest back panel assembly including the aforementioned fastener, further comprising an upper surface, front and back surface that engage with the fixing frame unit, and a lower surface and front surface that engage with a horizontal bar on the back panel of the limiting frame unit.

[0019] A further preferred technical solution includes a front slot provided on the front of the crossbar on the back plate, which is used to insert the fixing frame unit and the limiting frame unit.

[0020] The beneficial effects of this application include at least the following seven points.

[0021] First, the buckle itself has an opening and fully engages with the upper, lower, front, and back surfaces of the horizontal bar on the back panel. Therefore, it can achieve the dual advantages of installation stability and ease of setting and releasing the buckle on the horizontal bar of the back panel, thus meeting the installation requirements of detachable headrests for seats.

[0022] Secondly, the overall structure of the fastener provides sufficient and appropriate deformation, and the locking strength provided by the limiting block at the installation end is also sufficient and appropriate. Ultimately, this makes the rotation installation and rotation removal of the detachable headrest relatively simple and convenient, and can be completed with one hand.

[0023] Third, the supplementary limiting transition plate in this fastener has at least the following two functions: 1. Together with the anti-tilt limiting plate, it engages with the back of the horizontal bar on the back plate. Under the premise of ensuring that the fastener is fully attached to the back of the horizontal bar on the back plate, the bending range of the anti-tilt limiting plate itself is allowed to be relatively small. Otherwise, the bending degree of the anti-tilt limiting plate can only be relatively large, which will greatly increase the elasticity of the entire fastener and reduce its engagement strength; 2. As a connecting transition position between the limiting frame unit and the fixed frame unit, it makes the structural stability of the limiting frame unit better and makes the two units less likely to be torn apart.

[0024] Fourth, the fastener has two anti-tilt limit blocks and two installation endpoint limit blocks, which are located on both sides of the fastener, thus providing a comprehensive limiting effect.

[0025] Fifth, in the above-mentioned detachable headrest, the headrest connecting rod has a relatively small length, which makes the torque in the tendency of the anti-tilt limiting block to break relatively small, making it less prone to breakage.

[0026] Sixth, in the above-mentioned detachable headrest, the rotating plate for stretching the neck has at least the following two functions: 1. It can rotate upward and backward, thereby guiding the user to stretch the neck, which is beneficial to neck health; 2. It adjusts the direction of the force that the user's neck ultimately presses down on the fixed frame unit downward, thereby obtaining a larger downward component force and a smaller backward component force, which is also beneficial to the installation stability of the fasteners.

[0027] Seventh, in this headrest back panel assembly, the horizontal bar on the back panel combined with the front slot allows the entire fastener to have basic installation stability on the horizontal bar on the back panel, and further enhances the engagement stability of the anti-tilt limit block and the installation end limit block on the front slot. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the fastener structure in this application.

[0029] Figure 2 This is a schematic diagram of the position and structure of the fixed frame unit in this application.

[0030] Figure 3 This is a structural schematic diagram of the limiting frame unit in this application.

[0031] Figure 4 This is a schematic diagram illustrating the installation method of the clips in this application.

[0032] Figure 5 This is a schematic diagram showing the shape of the position where the horizontal axis is installed in this application.

[0033] Figure 6 This is a schematic diagram showing the position of the horizontal bar on the back panel in this application.

[0034] The meanings of the markings in the diagram are as follows.

[0035] Fixed frame unit 1, bottom front extension plate 2, limiting frame unit 3;

[0036] Horizontal connecting plate 101, anti-tilt limit block 102, anti-tilt limit plate 103;

[0037] Vertical clamping plate 301, installation endpoint limiting block 302, supplementary limiting transition plate 303;

[0038] 4. Headrest connecting rod; 5. Hinged transverse cylinder; 6. Neck extension rotating plate; 7. Mounting transverse shaft.

[0039] Horizontal bar 11 on the back panel, and slot 12 on the front panel. Detailed Implementation

[0040] The following description is merely a preferred embodiment of this application and is not intended to limit the scope of this application.

[0041] like Figures 1-6 As shown, a fastener has a structure including a fixing frame unit 1 for engaging the upper surface, front and back of the crossbar 11 on the back plate, a bottom front-facing extension plate 2 disposed on the fixing frame unit 1, and a limiting frame unit 3 disposed on the bottom front-facing extension plate 2 for engaging the lower surface and front of the crossbar 11 on the back plate.

[0042] In this embodiment, the fastener is integrally formed and is made of materials such as nylon 6, nylon 66, or nylon 56.

[0043] The buckle has a C-shaped overall design and is made of a material that combines high strength with excellent toughness. Therefore, it provides sufficient installation stability on the crossbar 11 on the back panel, as well as easy assembly and disassembly.

[0044] When used with a seat headrest, the fixing frame unit 1 provides basic forward, backward, and downward limiting effects, giving the headrest basic support, but overall stability is insufficient. Correspondingly, when the fixing frame unit 1 is combined with the bottom front extension plate 2 and the limiting frame unit 3, the entire fastener is completely fixed vertically, thus providing relatively efficient and stable support for the user's head and neck weight.

[0045] The installation method of this fastener on the horizontal bar 11 on the back panel mainly includes the following steps:

[0046] 1. The buckle is tilted so that the bottom front faces the extension plate 2 and is tilted back at an appropriate angle, so that the fixing frame unit 1 is fastened to the upper surface of the cross bar 11 on the back plate.

[0047] 2. Rotate the buckle roughly around the position of the upper surface of the horizontal bar 11 on the back plate, so that the limiting frame unit 3 is successively released, pressed, and finally passes over the lower surface of the horizontal bar 11 on the back plate. At this time, the fixing frame unit 1 is fully attached to the back of the horizontal bar 11 on the back plate, and the entire installation operation is completed.

[0048] The side of the back panel with the horizontal bar 11 facing the user is the front, and the opposite side is the back. The method for disassembling this fastener mainly includes the following steps:

[0049] First, hold the bottom front facing the extension plate 2 or the limiting frame unit 3, and rotate the buckle backward and upward around the position of the upper surface of the horizontal bar 11 on the back plate, so that the limiting frame unit 3 passes over, squeezes, and separates from the lower surface of the horizontal bar 11 on the back plate in sequence.

[0050] Second, lift the entire buckle directly upwards to separate the fixed frame unit 1 from the crossbar 11 on the back plate, thus completing the entire disassembly operation.

[0051] The fixed frame unit 1 includes a transverse connecting plate 101 disposed on the upper surface of the crossbar 11 on the back plate, an anti-tilting limiting block 102 disposed on the transverse connecting plate 101 and protruding downward for engaging the front of the crossbar 11 on the back plate, and an anti-tilting limiting plate 103 disposed on the transverse connecting plate 101 and having the bottom front-facing extension plate 2 for engaging the back of the crossbar 11 on the back plate.

[0052] In this embodiment, the vertical dimension of the anti-tilt limiting plate 103 is larger than that of the anti-tilt limiting block 102.

[0053] The limiting frame unit 3 includes a vertical locking plate 301 disposed on the bottom front extension plate 2 and used to lock the lower surface of the horizontal bar 11 on the back plate, and a limiting block 302 for the installation endpoint disposed on the vertical locking plate 301 and used to lock the front of the horizontal bar 11 on the back plate.

[0054] In this embodiment, the overall size of the installation endpoint limiting block 302 is smaller than that of the anti-tilt limiting block 102. When the fastener is used correctly, the anti-tilt limiting block 102 is the main pressure-bearing position compared to the installation endpoint limiting block 302, therefore its overall size needs to be relatively larger.

[0055] Correspondingly, the installation endpoint limiting block 302 and the anti-tilt limiting block 102 are both located on the front side of the horizontal bar 11 on the back plate, with the former at the bottom and the latter at the top.

[0056] At this point, the horizontal connecting plate 101 and the vertical locking plate 301 clamp the horizontal bar 11 on the back plate one above the other; the anti-tilt limiting block 102 and the installation endpoint limiting block 302 are combined together and matched with the anti-tilt limiting plate 103, thus clamping the horizontal bar 11 on the back plate one in front and one in back, ultimately ensuring that the fastener has sufficient installation stability.

[0057] The limiting frame unit 3 also includes a supplementary limiting transition plate 303 disposed on the vertical locking plate 301 and connected to the anti-tilting limiting plate 103, and used to lock the back of the horizontal bar 11 on the back plate.

[0058] In this embodiment, in addition to adjusting its own toughness and elasticity parameters in terms of materials and processes, the buckle can also adjust the above parameters in terms of structure. This is the first function of the supplementary limiting transition plate 303, as follows.

[0059] The existing common backplate horizontal bar 11 is generally not a completely flat surface on its four sides (top, bottom, front, and back). Therefore, when the anti-tilt limiting plate 103 needs to fully fit the curved back of the backplate horizontal bar 11, it needs a relatively large bending arc. This can easily lead to excessive elasticity of the plate itself and the entire fastener, resulting in low installation stability and overly easy disassembly and assembly. In other words, the installation endpoint limiting block 302 can pass over the lower surface of the backplate horizontal bar 11 with relatively little effort.

[0060] At this time, the supplementary limiting transition plate 303 fits against the back of the horizontal bar 11 on the back plate through its appropriate arc edge, thereby allowing the anti-tilt limiting plate 103 to straighten appropriately without a large degree of bending, and finally adjusting the elastic strength of the entire buckle.

[0061] In the first function described above, the supplementary limiting transition plate 303 is a flat plate. It fits the back of the horizontal bar 11 on the back plate by means of its curved edge rather than its own bending. Therefore, it will not increase the elasticity of the buckle again. However, this is something that the anti-tilting limiting plate 103, which is also the main pressure-bearing part, cannot achieve. This is also the main purpose of setting the supplementary limiting transition plate 303.

[0062] On the other hand, the second function of the supplementary limiting transition plate 303 is:

[0063] It serves as a transition and connection between the anti-tilt limiting plate 103 and the vertical locking plate 301, preventing them from easily breaking apart and improving the structural strength of the entire fastener.

[0064] The further enhancement effect of the second function mentioned above is that, in order to fully fit the back of the horizontal bar 11 on the back plate in the first function, the supplementary limiting transition plate 303 has a relatively large vertical dimension and its upper end is relatively high, which makes the connection in the second function further highlight and strengthen the overall effect.

[0065] Specifically, the horizontal connecting plate 101, the anti-tilt limiting block 102, the anti-tilt limiting plate 103, and the vertical locking plate 301 are generally rectangular in shape. The installation endpoint limiting block 302 is generally triangular or semi-circular in shape, and the supplementary limiting transition plate 303 is generally sickle-shaped. See the attached diagram for details. Figure 3 .

[0066] There are two anti-tilt limit blocks 102, which are respectively set at both ends of the transverse connecting plate 101.

[0067] The number of the limiting frame units 3 is 2, which are respectively set at both ends of the bottom front extension plate 2.

[0068] In this embodiment, one of the functions of the vertical locking plate 301 is to ensure that the installation endpoint limiting block 302 has sufficient structural stability even though its own size is relatively small. The principle is as follows:

[0069] 1. If the vertical locking plate 301 is not set, the installation endpoint limiting block 302 is directly set on the bottom front extension plate 2. The former is vertical and the latter is horizontal. The bend is relatively easy to break, that is, the installation endpoint limiting block 302 falls off.

[0070] 2. After the vertical locking plate 301 is set, although the vertical locking plate 301 and the bottom front extension plate 2 are also bent perpendicularly to each other, the connection area is large, so it is not easy to break. Furthermore, at this time, the vertical locking plate 301 and the installation end point limit block 302 are not bent structures, but coplanar structures, so they are relatively less prone to breakage.

[0071] It should be noted that although the anti-tilt limit block 102 and the transverse connecting plate 101 are mutually perpendicular bending structures, the size of the anti-tilt limit block 102 is much larger than the limit block 302 used at the installation end point, so the bending point is also not easy to break.

[0072] A detachable headrest including the aforementioned buckle, the structure further includes a headrest connecting rod 4 disposed on the upper surface of the fixed frame unit 1 and having a length ≤10cm.

[0073] In this embodiment, the headrest connecting rod 4, due to its relatively small length, results in a relatively small torque in the fracture tendency of the anti-tilt limiting block 102, ultimately making it less prone to breakage.

[0074] The structure of this detachable headrest also includes a hinged transverse cylinder 5 disposed on the headrest connecting rod 4, a neck-stretching rotating plate 6 disposed on the hinged transverse cylinder 5 and used to tilt and press down the fixed frame unit 1, and a mounting transverse shaft 7 disposed on the neck-stretching rotating plate 6 and inserted into the hinged transverse cylinder 5.

[0075] In this embodiment, the hinged transverse cylinder 5 is integrally formed with the headrest connecting rod 4, and the mounting transverse shaft 7 is integrally formed with the hinged transverse cylinder 5, so that the user's head and neck are indirectly pressed on the fixed frame unit 1.

[0076] Therefore, the relative rotatable function between the hinged transverse cylinder 5 and the stretching neck rotating plate 6 serves at least the following two purposes:

[0077] First, it guides the user's head and neck to tilt upwards and backwards, which is beneficial to the health of the head and neck;

[0078] Second, the rotating plate 6 for stretching the neck is rotated upward and backward, which increases the downward component of the indirect pressure and decreases the backward component. The latter component has a greater destructive effect on the anti-tilt limit block 102, thus making the anti-tilt limit block 102 less prone to breakage.

[0079] The horizontal cylinder 5 for hinge is generally cylindrical, the rotating plate 6 for tension neck is basically a vertical plate, and the mounting horizontal shaft 7 is a circular shaft. Furthermore, the rotating plate 6 for tension neck has the following specific shape: two vertical plates plus an arc-shaped plate. The vertical plates are located on both sides of the horizontal cylinder 5 for hinge, and the arc-shaped plate rotates around the horizontal cylinder 5 for hinge. See the attached diagram for details. Figure 5 .

[0080] A headrest back panel assembly including the aforementioned fasteners, further comprising a horizontal bar 11 on the back panel that engages with the fixing frame unit 1 on its upper surface, front surface, and back surface, and with the limiting frame unit 3 on its lower surface and front surface.

[0081] In this embodiment, the horizontal bar 11 on the back panel is one of the components of the back panel frame. The back panel frame is rectangular in shape, and a mesh cloth is then set on it to achieve the basic seat back panel support function.

[0082] The structure of the headrest back panel assembly also includes a front slot 12 on the front of the crossbar 11 on the back panel, which is used to insert the fixing frame unit 1 and the limiting frame unit 3.

[0083] In this embodiment, the front slot 12 can be either only formed on the horizontal bar 11 on the back plate, or it can be a complete rectangular ring formed on the entire back plate frame.

[0084] At this time, the anti-tilt limit block 102 and the installation end limit block 302 are appropriately tilted to the back, that is, bent towards the inside of the buckle, so that they can have further engagement stability on the front slot 12.

[0085] On the other hand, the anti-tilt limit block 102 and the installation endpoint limit block 302 can also be set to be curved, and are also partially embedded in the front slot 12, which improves the installation stability of the entire detachable headrest on the seat back panel.

[0086] Correspondingly, the difficulty of establishing and disengaging the locking state of the installation endpoint limit block 302 on the crossbar 11 on the back plate is relatively high. The increased locking difficulty can be compensated by appropriately increasing the elasticity of the entire fastener. Ultimately, the fastener still achieves the dual advantages of sufficient installation stability and convenient disassembly and assembly.

[0087] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this application. These are non-inventive modifications and are protected by patent law as long as they are within the scope of the claims of this application.

Claims

1. A fastener, characterized in that: The structure includes a fixing frame unit (1) for engaging the upper surface, front and back of the crossbar (11) on the back plate, a bottom front extension plate (2) disposed on the fixing frame unit (1), and a limiting frame unit (3) disposed on the bottom front extension plate (2) for engaging the lower surface and front of the crossbar (11) on the back plate.

2. A snap-fit ​​component according to claim 1, characterized in that: The fixed frame unit (1) includes a transverse connecting plate (101) disposed on the upper surface of the crossbar (11) on the back plate, an anti-tilting limiting block (102) disposed on the transverse connecting plate (101) and protruding downward for engaging the front of the crossbar (11) on the back plate, and an anti-tilting limiting plate (103) disposed on the transverse connecting plate (101) and having the bottom front-facing extension plate (2) for engaging the back of the crossbar (11) on the back plate.

3. A snap fastener according to claim 2, characterized in that: The limiting frame unit (3) includes a vertical locking plate (301) disposed on the bottom front extension plate (2) and used to lock the lower surface of the back upper horizontal bar (11), and an installation end point limiting block (302) disposed on the vertical locking plate (301) and used to lock the front of the back upper horizontal bar (11).

4. A snap-fit ​​component according to claim 3, characterized in that: The limiting frame unit (3) also includes a supplementary limiting transition plate (303) disposed on the vertical locking plate (301), connected to the anti-tilting limiting plate (103), and used to lock the back of the horizontal bar (11) on the back plate.

5. A snap-fit ​​component according to claim 2, characterized in that: There are two anti-tilt limit blocks (102), which are respectively set at both ends of the transverse connecting plate (101).

6. A snap-fit ​​component according to claim 3, characterized in that: The number of the limiting frame units (3) is 2, which are respectively set at both ends of the bottom front extension plate (2).

7. A detachable headrest comprising a snap-fit ​​element as described in any one of claims 1-6, characterized in that: The structure also includes a headrest connecting rod (4) with a length ≤10cm, which is disposed on the upper surface of the fixed frame unit (1).

8. A detachable headrest including the fastener according to claim 7, characterized in that: It also includes a hinged transverse cylinder (5) mounted on the headrest connecting rod (4), a neck-stretching rotating plate (6) mounted on the hinged transverse cylinder (5) and used to tilt and press down the fixed frame unit (1), and a mounting transverse shaft (7) mounted on the neck-stretching rotating plate (6) and inserted into the hinged transverse cylinder (5).

9. A headrest back panel assembly comprising a snap-fit ​​element as described in any one of claims 1-6, characterized in that: The structure also includes a horizontal bar (11) on the back plate of the upper surface, front and back of the fixed frame unit (1) and the lower surface and front of the limiting frame unit (3).

10. A headrest back panel assembly including the fastener according to claim 9, characterized in that: It also includes a front slot (12) provided on the front of the crossbar (11) on the back plate and used for inserting the fixed frame unit (1) and the limiting frame unit (3).

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