A seat headrest damping hinge

Abstract

The present application relates to a seat headrest damping hinge, comprising: a damping spring and a core shaft. The damping spring comprises a damping spring body and a tail, the tail being fixedly connected to the damping spring body; the tail extending along a plane, the edge of the tail having a number of notches, and the inner part of the edge of the tail having a number of openings; the tail being configured to be connected to the body of the seat headrest; the core shaft being inserted into the damping spring body, being subjected to the pressure of the damping spring body so as to have a damping force when rotating; the core shaft being configured to be connected to the side wing of the seat headrest. The seat headrest damping hinge provided in the present application has a tail being fixedly connected to the damping spring body, the tail extending along a plane, having a thin thickness, and being applicable to ultra-thin sleeping headrests; the edge of the tail having a number of notches, and the inner part of the edge having a number of openings, and during plastic coating, the plastic enters the notches and openings, fully combining with the tail, increasing the combining strength, and playing a role in preventing slipping and falling off.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of automobile parts, and in particular to a seat headrest damping hinge. Background Art

[0002] The car seat sleeping headrest is a functional headrest. When sleeping, the occupant can adjust the side wings forward to provide support on both sides of the head. When not in use, the side wings can be adjusted backward and retracted.

[0003] This structure in which the side wings are adjustable relative to the main body relies on a damping hinge. The more commonly used sleeping headrest damping hinge is mainly composed of three parts, namely the outer shell, the damping spring and the core shaft. Among them, the damping spring is wrapped in the outer shell, and the outer shell is used as the fixed end interface for plastic coating; the core shaft is inserted into the damping spring, and damping is generated through positive pressure. The knurled features are processed on both ends of the core shaft and used as the rotating end interface for plastic coating. This type of sleeping headrest damping hinge is difficult to use in ultra-thin sleeping headrests, because its damping spring must be installed in a relatively large outer shell, which makes it difficult to fix it in the ultra-thin sleeping headrest using the plastic coating process, and there are certain limitations. Utility Model Content

[0004] In view of this, the embodiment of the present application provides a seat headrest damping hinge to solve the problem that the damping hinge in the background art is difficult to apply to an ultra-thin sleeping headrest.

[0005] The embodiment of the present application provides a seat headrest damping hinge, comprising:

[0006] A damping spring, the damping spring comprising a damping spring body and a tail portion, the tail portion being fixedly connected to the damping spring body; the tail portion extending along a plane, the edge of the tail portion having a plurality of notches, the inner portion of the edge of the tail portion having a plurality of openings; the tail portion being configured to be connected to the body of the seat headrest;

[0007] A core shaft, inserted into the damping spring body, subjected to pressure from the damping spring body so as to produce a damping force when rotating; the core shaft is configured to be connected to a side wing of the seat headrest;

[0008] When the side wing of the seat headrest rotates relative to the main body of the seat headrest under external force, the core shaft rotates relative to the damping spring main body, and the damping force can keep the rotated side wing stationary when the external force is removed.

[0009] In an optional embodiment, the opening includes: an elongated hole, the length direction of the elongated hole is perpendicular to the axial direction of the damping spring body.

[0010] In an optional embodiment, the elongated hole is formed by a plurality of circular holes which are arranged in a direction perpendicular to the axial direction of the damping spring body and are connected in sequence.

[0011] In an optional embodiment, the opening includes: a screw hole, the screw hole is circular, and the screw hole is configured to allow a screw to pass through or for plastic to be injected.

[0012] In an optional embodiment, the opening includes: a waist-shaped hole, and the waist-shaped hole is configured to allow a screw to pass through or for plastic to be injected.

[0013] In an optional embodiment, the screw hole is located on the extension line of the waist-shaped hole along the length direction.

[0014] In an optional embodiment, the shape of the notch is rectangular or semicircular.

[0015] In an optional embodiment, both ends of the core shaft have knurling.

[0016] In an optional embodiment, the damping spring body is integrally connected to the tail portion.

[0017] In an optional embodiment, the damping spring is a sheet metal part.

[0018] The seat headrest damping hinge provided in the embodiment of the present application has a tail portion fixedly connected to the damping spring body, and the tail portion extends along a plane and has a thin thickness, so that it can be suitable for an ultra-thin sleeping headrest; the edge of the tail portion has a plurality of notches, and the inner part of the edge has a plurality of openings. During the plastic wrapping, the plastic enters the notches and openings and is fully combined with the tail portion, thereby increasing the combination strength and playing a role in preventing slipping and falling off.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 A schematic diagram of the assembly structure of a seat headrest damping hinge provided in an embodiment of the present application;

[0022] Figure 2 A diagram of the seat headrest damping hinge parts provided in an embodiment of the present application.

[0023] The reference numerals in the figure are:

[0024] 1. Damping spring body;

[0025] 2. Mandrel; 21. Knurling;

[0026] 3. Tail; 31 notch; 32 opening; 321 long hole; 322 screw hole; 323 waist-shaped hole. DETAILED DESCRIPTION

[0027] The exemplary embodiments disclosed in the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the specific embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope disclosed in the present application to those skilled in the art.

[0028] In the following description, a large number of specific details are given to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features known in the art are not described; that is, all features of the actual embodiments are not described here, and well-known functions and structures are not described in detail.

[0029] In the drawings, the size of components, mechanisms, gaps and their relative sizes may be exaggerated for clarity. Like reference numerals denote like elements throughout.

[0030] It should be understood that when a component or mechanism is referred to as "on ...", "adjacent to ...", "connected to" or "coupled to" other components or mechanisms, it can be directly on, adjacent to, connected to or coupled to other components or mechanisms, or there can be intermediate components or mechanisms. On the contrary, when a component or mechanism is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" or "directly coupled to" other components or mechanisms, there is no intermediate component or mechanism. It should be understood that although the terms first, second, third, etc. can be used to describe various components, mechanisms, gaps and / or parts, these components, mechanisms, gaps and / or parts should not be limited by these terms. These terms are only used to distinguish one component, mechanism, gap or part from another component, mechanism, gap or part. Therefore, without departing from the teachings of the present application, the first component, mechanism, gap or part discussed below can be expressed as the second component, mechanism, gap or part. And when the second component, mechanism, gap or part is discussed, it does not indicate that the present application necessarily has the first component, mechanism, gap or part.

[0031] Spatially relative terms such as "under", "beneath", "below", "under", "above", "above", etc., may be used herein for convenience of description to describe the relationship of one component or feature shown in the figures to other components or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the drawings is turned over, then the components or features described as "under the other components" or "beneath" or "below" will be oriented as "above" the other components or features. Therefore, the exemplary terms "under" and "under" may include both upper and lower orientations. The components may be oriented otherwise (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0032] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present application. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0033] In order to thoroughly understand the present application, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution of the present application. The preferred embodiments of the present application are described in detail below, but in addition to these detailed descriptions, the present application may also have other implementation methods.

[0034] The present application embodiment provides a seat headrest damping hinge, such as Figure 1-Figure 2 As shown, including:

[0035] A damping spring, the damping spring comprising a damping spring body 1 and a tail 3, the tail 3 being fixedly connected to the damping spring body 1; the tail 3 extending along a plane, the edge of the tail 3 having a plurality of notches 31, the inner portion of the edge of the tail 3 having a plurality of openings 32; the tail 3 being configured to be connected to the body of the seat headrest;

[0036] A core shaft 2 is inserted into the damping spring body 1 and is subjected to pressure from the damping spring body 1 so as to produce a damping force when rotating; the core shaft 2 is configured to be connected to the side wing of the seat headrest;

[0037] When the side wing of the seat headrest rotates relative to the main body of the seat headrest due to external force, the core shaft 2 rotates relative to the damping spring main body 1, and the damping force can keep the rotated side wing stationary when the external force is removed.

[0038] The seat headrest damping hinge of this embodiment is used for adjusting the side wings of the sleeping headrest of the car seat, wherein the tail 3 is connected to the main body of the seat headrest through the overmolding process, and the core shaft 2 is connected to the side wings of the seat headrest through the overmolding process or by setting a matching piece. The overmolding process refers to a plastic sealing process in which a plastic sheet is fixed in a heat-sealing mold, and then the mold is heated to melt the sheet and bond it to the wrapped object. Through the overmolding process, the tail 3 of this embodiment is fixed to the main body of the seat headrest, and the core shaft 2 is fixed to the side wings of the seat headrest. In this embodiment, the damping spring main body 1 is a sleeve-shaped, elastic component, and its inner diameter before assembly should be smaller than the outer diameter of the core shaft 2. In this way, after the core shaft 2 is assembled inside it, it is squeezed under the action of its elasticity, and the relative rotation between the two will generate a certain damping force. Through the seat headrest damping hinge of this embodiment, the main body and the side wings of the seat headrest can rotate relative to each other and there is a damping feeling, which is convenient for the positioning of the side wings. When the user uses the car seat sleeping headrest, the user can push and pull the side wings by hand to rotate the side wings to the appropriate position, and the side wings can be maintained in this position due to the damping; when the side wings are not needed, the side wings can be pushed back to the storage position, and the side wings can also be maintained in the storage position under the action of damping.

[0039] The seat headrest damping hinge provided in the embodiment of the present application has a tail portion 3 fixedly connected to the damping spring body 1. The tail portion 3 extends along the plane and is thin, so it can be suitable for ultra-thin sleeping headrests. Compared with the prior art, the volume of the damping spring that needs to be installed in the headrest after an outer shell is added; the edge of the tail portion 3 has a plurality of notches 31, and the inner part of the edge has a plurality of openings 32. During the plastic wrapping, the plastic enters the notches 31 and the openings 32, and is fully combined with the tail portion 3, thereby increasing the bonding strength, playing a role in preventing slipping and falling off, and ensuring sufficient connection strength even without a outer shell.

[0040] In an optional embodiment, the seat headrest damping hinge of this embodiment, such as Figure 2As shown, the opening 32 includes: an elongated hole 321, the length direction of which is perpendicular to the axial direction of the damping spring body 1. In this embodiment, the provision of the elongated hole 321 allows the plastic of the main body of the seat headrest to fully enter the elongated hole 321 during the overmolding process to form an elongated plastic part that matches the main body of the seat headrest. Since the length direction of the elongated plastic part is perpendicular to the axial direction of the damping spring body 1, and the side wings are also most likely to become loose due to the force perpendicular to the axial direction of the damping spring body 1, the provision of the elongated plastic part can greatly improve the connection strength of the plastic structure of the main body of the seat headrest to the side wings and the seat headrest damping hinge, thereby reducing the possibility of the side wings and the seat headrest damping hinge falling off.

[0041] In an optional embodiment, the seat headrest damping hinge of this embodiment, such as Figure 2 As shown, the elongated hole 321 is formed by a plurality of circular holes arranged in a direction perpendicular to the axial direction of the damping spring body 1 and connected in sequence. In this solution, the manufacturing process of the elongated hole 321 is simple, and when drilling holes on the tail 3, multiple circular holes can be processed continuously. The processing of the circular holes is relatively simple, so the cost can be well controlled, which is conducive to industrialization.

[0042] In an optional embodiment, the seat headrest damping hinge of this embodiment, such as Figure 2 As shown, the opening 32 includes a screw hole 322, which is circular and configured to allow a screw to pass through or for plastic to be injected. In this embodiment, the screw hole 322 is circular. This design can allow plastic to enter during the overmolding process, and can also be used with screws when a fixing member is selected for fixing, thereby improving the versatility of the parts.

[0043] In an optional embodiment, the seat headrest damping hinge of this embodiment, such as Figure 2 As shown, the opening 32 includes a waist-shaped hole 323, which is configured to allow screws to pass through or plastic to be injected. In this embodiment, the design of the waist-shaped hole 323 can allow plastic to enter during the overmolding process, and can also be used to fix with screws when a fixing member is selected, thereby improving the versatility of the parts; and the characteristics of the waist-shaped hole 323 can allow the position of the screw connection to be adjusted to a certain extent, thereby further improving the versatility of the parts.

[0044] In an optional embodiment, if Figure 2As shown, the screw hole 322 is located on the extension line of the waist-shaped hole 323 along the length direction. In this embodiment, the screw hole 322 and the waist-shaped hole 323 are arranged along the same straight line, which can improve the balance of force when the tail 3 is fixed. Preferably, the long hole 321 is located in the middle of the tail 3, and the screw hole 322 and the waist-shaped hole 323 can be arranged on both sides of the long hole 321 respectively, so as to further improve the balance of force when the tail 3 is fixed.

[0045] In an optional embodiment, the seat headrest damping hinge of this embodiment, such as Figure 2 As shown, the shape of the notch 31 is rectangular, which is convenient for processing, or it can also be semicircular, which is also convenient for processing and reduces costs.

[0046] In an optional embodiment, the seat headrest damping hinge of this embodiment, such as Figure 2 As shown, both ends of the core shaft 2 have knurling 21. In this embodiment, the structure of the knurling 21 is easy to process, and can enhance the tightness of contact with the plastic when combined with the side wing through the overmolding process, so as to ensure that the rotation of the side wing and the core shaft 2 can be synchronized.

[0047] In an optional embodiment, the seat headrest damping hinge of this embodiment, such as Figure 1 , Figure 2 As shown, the damping spring body 1 is integrally connected with the tail portion 3. In this embodiment, the damping spring body 1 and the tail portion 3 of the damping spring can be integrally formed during manufacture, which reduces the cost and ensures reliable fixation.

[0048] In an optional embodiment, the seat headrest damping hinge of this embodiment, such as Figure 1 , Figure 2 As shown, the damping spring is a sheet metal part. In this solution, the damping spring is manufactured by sheet metal technology, which is low in cost and easy to industrialize. A metal sheet can be used to make the damping spring body 1 by sheet metal, and the remaining part is used as the tail 3. The process is simple and reliable, and the subsequent punching process is easy to operate.

[0049] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations included in the claims. Various modifications and changes may be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form other embodiments of the present application that may not be explicitly described. Therefore, the above embodiments only express several implementations of the present application and do not limit the scope of protection of the patent of this application.

Claims

1. A seat headrest damping hinge, characterized in that: include: A damping spring, the damping spring comprising a damping spring body (1) and a tail (3), the tail (3) being fixedly connected to the damping spring body (1); the tail (3) extending along a plane, the edge of the tail (3) having a plurality of notches (31), and the inner portion of the edge of the tail (3) having a plurality of openings (32); the tail (3) being configured to be connected to the body of the seat headrest; A core shaft (2) is inserted into the damping spring body (1) and is subjected to pressure from the damping spring body (1) so as to produce a damping force when rotating; the core shaft (2) is configured to be connected to the side wing of the seat headrest; When the side wing of the seat headrest rotates relative to the main body of the seat headrest under external force, the core shaft (2) rotates relative to the damping spring main body (1), and the damping force can keep the rotated side wing stationary when the external force is removed.

2. The seat headrest damping hinge according to claim 1, characterized in that: The opening (32) comprises: an elongated hole (321), wherein the length direction of the elongated hole (321) is perpendicular to the axial direction of the damping spring body (1).

3. The seat headrest damping hinge according to claim 2, characterized in that: The elongated hole (321) is formed by a plurality of circular holes arranged in a direction perpendicular to the axial direction of the damping spring body (1) and connected in sequence.

4. The seat headrest damping hinge according to any one of claims 1 to 3, characterized in that: The opening (32) comprises: a screw hole (322), the screw hole (322) is circular, and the screw hole (322) is configured to allow a screw to pass through or for plastic to be injected.

5. The seat headrest damping hinge according to claim 4, characterized in that: The opening (32) comprises a waist-shaped hole (323), and the waist-shaped hole (323) is configured to allow a screw to pass through or for plastic to be injected.

6. The seat headrest damping hinge according to claim 5, characterized in that: The screw hole (322) is located on the extension line of the waist-shaped hole (323) along the length direction.

7. The seat headrest damping hinge according to any one of claims 1 to 3, characterized in that: The shape of the notch (31) is rectangular or semicircular.

8. The seat headrest damping hinge according to any one of claims 1 to 3, characterized in that: Both ends of the core shaft (2) are provided with knurling (21).

9. The seat headrest damping hinge according to any one of claims 1 to 3, characterized in that: The damping spring body (1) and the tail portion (3) are integrally connected.

10. The seat headrest damping hinge according to claim 9, characterized in that: The damping spring is a sheet metal part.

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