Headrest built-in lock locking guide sleeve and headrest mounting structure

Abstract

The utility model relates to a built-in lock locking guide sleeve of a headrest and a headrest mounting structure. The built-in lock locking guide sleeve comprises a headrest guide sleeve body, a guide sleeve cover and an unlocking button, wherein the headrest guide sleeve body comprises a columnar assembly part and a button cover, the side face of the button cover is provided with an insertion port, a button cavity used for containing the unlocking button is formed between the button cover and the columnar assembly part, and the side, away from the insertion port, of the top face of the button cover is provided with a long-strip-shaped clamping groove; the guide sleeve cover covers the button cover; the unlocking button is arranged in the button cavity and moves in the Y direction relative to the button cover. The end, inserted into the button cavity, of the unlocking button is provided with a wave spring, and the top face of the unlocking button is provided with a clamping block which is arranged in the clamping groove and moves in the Y direction relative to the clamping groove. And a locking block is arranged on the unlocking button, is matched with a one-way guide locking groove in the tail end of the headrest rod and is used for limiting the tail end of the headrest rod from continuing to move upwards. The guide sleeve can play a locking role when the headrest rod is about to be pulled out without influencing Z-direction movement of the headrest rod.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle seats, relates to the installation and fixation of headrests, and particularly relates to a hidden lock locking guide sleeve for a headrest and a headrest installation structure. Background Art

[0002] The headrest rod of the existing split headrest is installed on the seat frame in a detachable manner. Usually, 2 guide sleeves are installed on the headrest, one guide sleeve has a visible lock, and the other guide sleeve has no lock. When the headrest is normally lifted or lowered, only the visible lock needs to be pressed to unlock; however, when the user uses the visible lock to lift or lower the headrest, there is a possibility of accidentally pulling out the headrest; therefore, it is necessary to design a hidden lock guide sleeve structure to replace the existing lockless guide sleeve, which can not only be distinguished from the existing visible lock guide sleeve to avoid accidental operation during unlocking; at the same time, it can also play a limiting role when the headrest rod is about to be pulled out. Summary of the Invention

[0003] In view of the above technical problems and disadvantages, the purpose of the utility model is to provide a hidden lock locking guide sleeve for a headrest. The unlocking button of the guide sleeve is in a hidden state, which can be well distinguished from the existing guide sleeve with a visible lock to avoid accidental operation during unlocking; at the same time, by improving the headrest rod matching with it, it can play a locking role when the headrest rod is about to be pulled out without affecting the Z-direction movement of the headrest rod.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A hidden lock locking guide sleeve for a headrest, comprising a headrest guide sleeve body, a guide sleeve cover, and an unlocking button; wherein, the headrest guide sleeve body includes a columnar assembly part installed in the sleeve of the backrest frame and a button cover arranged at the upper end of the columnar assembly part. A first headrest rod assembly hole is arranged at the axial center position of the columnar assembly part; an insertion port is arranged on the side surface of the button cover, a button cavity for accommodating the unlocking button is arranged between the button cover and the columnar assembly part, a second headrest rod assembly hole is arranged at the top surface of the button cover at a position opposite to the first headrest rod assembly hole, and a long strip-shaped card slot is arranged on the side away from the insertion port;

[0006] The guide sleeve cover covers the button cover, and a fourth headrest rod assembly hole is arranged at a position of the guide sleeve cover opposite to the second headrest rod assembly hole;

[0007] The unlocking button is arranged in the button cavity and moves in the Y direction relative to the button cover; a third headrest rod assembly hole is arranged at a position of the unlocking button opposite to the second headrest rod assembly hole. One end inserted into the button cavity is provided with a corrugated spring, and a clamping block is arranged at the top surface at a position opposite to the card slot. The clamping block is arranged in the card slot and moves in the Y direction relative to the card slot; a locking block is arranged on the side surface of the third headrest rod assembly hole, and the locking block cooperates with a one-way guiding locking groove at the end of the headrest rod to limit the continuous upward movement of the end of the headrest rod.

[0008] Preferably, at least two sides of the columnar assembly part are provided with concave elastic fixing parts for fixing the headrest rod, and the elastic fixing parts are arranged near the lower end and / or the middle of the columnar assembly part.

[0009] Preferably, two symmetrical claws are arranged on the outer side wall of the columnar assembly part near the middle, and grooves are formed on the upper surface and both sides of the two claws.

[0010] Preferably, an avoidance notch is arranged on the guide sleeve cover at a position opposite to the pressing part of the unlocking button, the pressing part of the unlocking button is a structure imitating the avoidance notch, and the pressing part and the guide sleeve cover form a complete cover.

[0011] Preferably, the unlocking button includes a button body, a corrugated spring, a U-shaped needle or an open annular needle, and a pressing part; wherein, one end of the button body is provided with a corrugated spring, the other end is provided with a pressing part, a third headrest rod assembly hole is arranged in the middle of the button body, and a U-shaped needle or an open annular needle is also arranged inside the button body around the third headrest rod assembly hole.

[0012] Preferably, the locking grooves at the middle and upper ends of the headrest rod are two-way guiding locking grooves.

[0013] Preferably, the columnar assembly part and the button cover are integrally injection-molded.

[0014] Preferably, at least one notch is arranged on the top surface of the button body, and the U-shaped needle or the open annular needle is exposed at a position opposite to the notch.

[0015] Preferably, the U-shaped needle or the open annular needle and the corrugated spring are injection-molded onto the button body by insert molding, and the pressing part and the button body are integrally injection-molded.

[0016] The present invention also provides a headrest mounting structure, and the headrest is mounted on the backrest frame through a guide sleeve with a built-in visible lock and the above-mentioned hidden lock locking guide sleeve.

[0017] Advantages and beneficial effects of the present invention:

[0018] (1) The locking guide sleeve provided by the present invention has a simple structure, has a locking function in the Z direction, and the unlocking button is not exposed, which not only makes the appearance more beautiful, but also can be well distinguished from the existing guide sleeve with a built-in visible lock, avoiding misoperation during unlocking.

[0019] (2) The locking guide sleeve provided by the present utility model improves the headrest rod that matches with it, enabling it to play a locking role when the headrest rod is about to be pulled out without affecting the Z-direction movement of the headrest rod. After the locking guide sleeve is used in combination with the existing visible locking guide sleeve to complete the fixation of the headrest, it can prevent the headrest from being accidentally pulled out.

[0020] (3) The U-shaped pin of the present utility model is injection-molded into the unlocking button through insert molding, greatly increasing the strength of the unlocking button and thus increasing its service life. At the same time, there is an elastic deformation structure on the guide sleeve body, making the headrest rod more firmly inserted and preventing it from shaking.

[0021] (4) The upper end of the headrest guide sleeve body provided by the present utility model has two claws. The upper surface and the left and right sides of the claws are grooved, increasing the deformation tension of the guide sleeve claws, facilitating insertion and extraction, and making installation and disassembly easier. Moreover, the headrest guide sleeve body is made of PP material, which also realizes the lightweight of the parts and reduces costs.

[0022] (5) The locking guide sleeve provided by the present utility model has better strength, saves space, has strong operability, has a beautiful shape, and has a wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 Isometric view of the hidden lock locking guide sleeve of the headrest of the present utility model (without the headrest rod installed);

[0025] Figure 2 Isometric Figure 1 (with the headrest rod installed);

[0026] Figure 3 Isometric Figure 2 (with the headrest rod installed);

[0027] Figure 4 Isometric Figure 3 (with the headrest rod installed);

[0028] Figure 5 Top view of the hidden lock locking guide sleeve of the headrest of the present utility model (with the headrest rod installed);

[0029] Figure 6 For Figure 5 Sectional view along A-A in

[0030] Figure 7 Isometric view of the headrest guide sleeve body of the present utility model;

[0031] Figure 8 Isometric view of the guide sleeve cover of the present utility model;

[0032] Figure 9 Schematic diagram of the unlocking button of the present utility model;

[0033] Figure 10 Exploded schematic diagram of the unlocking button of the present utility model;

[0034] Figure 11 Schematic diagram of the headrest rod of the present utility model;

[0035] Reference numerals: headrest guide sleeve body 1, guide sleeve cover 2, unlocking button 3, corrugated spring 4, open annular needle 5, headrest rod 6, columnar assembly part 11, button cover 12, button cavity 13, fourth headrest rod assembly hole 21, avoidance notch 22, button body 30, third headrest rod assembly hole 31, locking block 32, locking piece 33, pressing part 34, one-way guiding locking groove 61, two-way guiding locking groove 62, first headrest rod assembly hole 111, elastic fixing part 112, clamping claw 113, insertion interface 121, second headrest rod assembly hole 122, clamping groove 123, notch 301. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0037] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this application is usually placed. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0038] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "set" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0039] As Figures 1 to 11 shown, this embodiment provides a headrest hidden lock locking guide sleeve, which includes a headrest guide sleeve body 1, a guide sleeve cover 2, and an unlocking button 3. Among them, the headrest guide sleeve body 1 includes a columnar assembly part 11 installed in the backrest frame sleeve and a button cover 12 arranged at the upper end of the columnar assembly part. A first headrest rod assembly hole 111 is provided at the axial center position of the columnar assembly part 11; an insertion interface 121 is provided on the side surface of the button cover 12, and a button cavity 13 for accommodating the unlocking button 3 is provided between the button cover 12 and the columnar assembly part 11. A second headrest rod assembly hole 122 is provided on the top surface of the button cover 12 at a position opposite to the first headrest rod assembly hole 111, and a long strip-shaped card slot 123 is provided on the side away from the insertion interface 121.

[0040] The guide sleeve cover 2 covers the button cover 12, and a fourth headrest rod assembly hole 21 is provided on the guide sleeve cover 2 at a position opposite to the second headrest rod assembly hole 122.

[0041] The unlocking button 3 is arranged in the button cavity 13 and moves in the Y direction relative to the button cover 12; a third headrest rod assembly hole 31 is provided on the unlocking button 3 at a position opposite to the second headrest rod assembly hole 122. One end inserted into the button cavity 13 is provided with a corrugated spring 4, and a locking block 32 is provided on the top surface at a position opposite to the card slot 123. The locking block 32 is arranged in the card slot 123 and moves in the Y direction relative to the card slot 123; a locking piece 33 is provided on the side surface of the third headrest rod assembly hole 31, and the locking piece 33 cooperates with the one-way guiding locking groove 61 at the end of the headrest rod 6 to limit the continued upward movement of the end of the headrest rod 6.

[0042] Furthermore, as Figures 1 to 7 shown, in this embodiment, at least two side surfaces of the columnar assembly part 11 are provided with concave elastic fixing parts 112, and the elastic fixing parts 112 are used to fix the headrest rod 6. The elastic fixing parts 112 are arranged near the lower end and / or the middle of the columnar assembly part 11 to ensure the stability of the installation of the headrest rod 6.

[0043] Two symmetrical claws 113 are provided on the outer side wall of the columnar assembly part 11 near the middle. Grooves are provided on the top and both sides of the two claws 113 to increase the deformation tension of the claws 113, which is convenient for plugging and unplugging and is convenient for installation and disassembly.

[0044] The columnar assembly part 11 and the button cover 12 are integrally injection-molded. The headrest guide sleeve body 1 is made of PP material, which also realizes the lightweight of parts and reduces costs.

[0045] Furthermore, as shown in Figure 1 and Figure 8 , in this embodiment, the guide sleeve cover 2 is provided with an avoidance notch 22 at a position opposite to the pressing part 34 of the unlocking button 3. The pressing part 34 of the unlocking button 3 is a structure imitating the avoidance notch 22, and the pressing part 34 and the guide sleeve cover 2 form a complete cover.

[0046] Furthermore, as shown in Figure 9 and Figure 10 , in this embodiment, the unlocking button 3 includes a button body 30, a wave spring 4, a U-shaped pin or an open loop pin 5, and a pressing part 34. Among them, one end of the button body 30 is provided with a wave spring 4, the other end is provided with a pressing part 34, a third headrest rod assembly hole 31 is provided in the middle of the button body 30, and a U-shaped pin or an open loop pin 5 is further provided inside the button body 30 around the third headrest rod assembly hole 31. The setting of the U-shaped pin or the open loop pin 5 is used to increase the overall strength of the unlocking button 4;

[0047] At least one notch 301 (two notches are provided in this embodiment) is provided on the top surface of the button body 30. The U-shaped pin or the open loop pin is exposed at a position opposite to the notch. It is convenient to check whether the U-shaped pin or the open loop pin 5 is installed through the notch 301.

[0048] In this embodiment, the U-shaped pin or the open loop pin 5 and the wave spring 4 are injection-molded onto the button body 30 by insert molding, and the pressing part 34 and the button body 30 are integrally injection-molded.

[0049] Furthermore, as shown in Figure 11 , in this embodiment, the locking grooves at the positions near the middle and upper ends of the headrest rod 6 are bidirectional guiding locking grooves 62, that is, the locking grooves with guiding at both the upper and lower ends. The bidirectional guiding locking grooves 62 are used to ensure that the headrest rod 6 can move normally along the Z direction when driving the visible lock guide sleeve, and it does not perform a locking function.

[0050] The present invention also provides a headrest mounting structure. The headrest is mounted on the backrest frame through a guide sleeve with a built-in visible lock and the above-mentioned hidden lock locking guide sleeve.

[0051] During normal operation, simply press the unlocking button for the visible lock guide sleeve without pressing the hidden lock, allowing the headrest rod to move up and down normally along the Z direction. When the headrest rod is about to be pulled out, the locking block 33 of the hidden lock locking guide sleeve cooperates with the one-way guiding locking groove 31 at the end of the headrest rod to restrict the continuous upward movement of the end of the headrest rod 6, effectively preventing the accidental removal of the headrest rod 6.

[0052] If it is necessary to remove the headrest from the seat, both the visible lock and the hidden lock need to be pressed. The working principle of the hidden lock locking guide sleeve is as follows: Press the unlocking button 3 of the hidden lock locking guide sleeve in the Y direction to push the unlocking button 3 out of the one-way guiding locking groove 61. The headrest rod is released from the Z-direction limit and realizes Z-direction movement. At this time, the corrugated spring 4 is compressed. When closing, remove the Y-direction force, and the unlocking button 3 is pushed into the one-way guiding locking groove 61 of the headrest rod under the stress of the corrugated spring 4 to restrict the continuous upward movement of the end of the headrest rod.

[0053] The above is the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A headrest hidden lock locking guide sleeve, characterized in that, It includes a headrest guide sleeve body, a guide sleeve cover, and an unlocking button; wherein, the headrest guide sleeve body includes a columnar assembly part installed in the sleeve of the backrest frame, and a button cover arranged at the upper end of the columnar assembly part. A first headrest rod assembly hole is provided at the axial center position of the columnar assembly part; an insertion interface is provided on the side of the button cover. A button cavity for accommodating the unlocking button is provided between the button cover and the columnar assembly part. A second headrest rod assembly hole is provided on the top surface of the button cover at a position opposite to the first headrest rod assembly hole, and a long strip-shaped card slot is provided on the side far from the insertion interface. The guide sleeve cover covers the button cover, and a fourth headrest rod assembly hole is provided on the guide sleeve cover at a position opposite to the second headrest rod assembly hole. The unlocking button is arranged in the button cavity and moves in the Y direction relative to the button cover; a third headrest rod assembly hole is provided on the unlocking button at a position opposite to the second headrest rod assembly hole. One end inserted into the button cavity is provided with a corrugated spring, and a clamping block is provided on the top surface at a position opposite to the card slot. The clamping block is arranged in the card slot and moves in the Y direction relative to the card slot; a locking block is provided on the side of the third headrest rod assembly hole. The locking block cooperates with the one-way guiding locking groove at the end of the headrest rod to limit the continuous upward movement of the end of the headrest rod.

2. The locking guide sleeve of a headrest hidden lock according to claim 1, characterized in that At least two side surfaces of the columnar assembly part are provided with concave elastic fixing parts for fixing the headrest rod. The elastic fixing parts are arranged near the lower end and / or the middle of the columnar assembly part.

3. The locking guide sleeve of the headrest hidden lock according to claim 1, characterized in that, Two symmetrical claws are provided on the outer side wall of the columnar assembly part near the middle position. Grooves are provided on the upper surface and both sides of the two claws.

4. A locking guide sleeve for a headrest latch according to claim 1, characterized in that, An avoidance notch is provided on the guide sleeve cover at a position opposite to the pressing part of the unlocking button. The pressing part of the unlocking button is a structure imitating the avoidance notch. The pressing part and the guide sleeve cover form a complete cover.

5. The headrest hidden lock locking guide sleeve according to claim 1, characterized in that, The unlocking button includes a button body, a corrugated spring, a U-shaped pin or an open-ring pin, and a pressing part; wherein, a corrugated spring is provided at one end of the button body, a pressing part is provided at the other end, a third headrest rod assembly hole is provided in the middle of the button body, and a U-shaped pin or an open-ring pin is also provided inside the button body around the third headrest rod assembly hole.

6. The locking guide sleeve of a headrest hidden lock according to claim 1, wherein, The locking grooves at the middle and upper positions of the headrest rod are two-way guiding locking grooves.

7. A locking guide sleeve for a headrest hidden lock according to claim 1, characterized in that, The columnar assembly part and the button cover are integrally injection-molded.

8. The locking guide sleeve of a headrest hidden lock according to claim 5, characterized in that At least one notch is provided on the top surface of the button body, and the U-shaped pin or the open-ring pin is exposed at a position opposite to the notch.

9. The locking guide sleeve of a headrest hidden lock according to claim 5, characterized in that, The U-shaped pin or the open-ring pin and the corrugated spring are injection-molded onto the button body by insert molding, and the pressing part and the button body are integrally injection-molded.

10. A headrest mounting structure, characterized in that, The headrest is installed on the backrest frame through a guide sleeve with a built-in lock and a hidden lock for locking the guide sleeve according to any one of claims 1 to 9.

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