A sun visor pulling mechanism and a vehicle sun visor

Abstract

A sun visor pulling mechanism and a vehicle sun visor, comprising: a sliding guide rail having an inner cavity; at least one support rod sleeve head slider arranged in the inner cavity; one end of the support rod sleeve head slider is provided with an elastic protrusion corresponding to the inner cavity to fit with the inner cavity by interference; a pulling support rod is arranged at the other end of the support rod sleeve head slider, so that the support rod sleeve head slider can drive the sliding guide rail to rotate around the pulling support rod; and the support rod sleeve head slider drives the pulling support rod to move relative to the inner cavity; the above technical scheme sets the elastic protrusion structure on the outer surface of the support rod sleeve head slider, solves the problems of large assembly force value and inconvenient operation of the traditional interference fit, prevents the loosening phenomenon from occurring after wear through the elastic compensation mechanism, and maintains the stable damping function.

Description

Technical Field

[0001] This application relates to the field of vehicle accessory technology, specifically to a sun visor pull-out mechanism and a vehicle sun visor. Background Technology

[0002] The core function of a vehicle sun visor is to block sunlight and prevent direct sunlight from hitting specific areas inside the car. At the same time, it can ensure driving safety by preventing glare from direct sunlight and reducing the risk of accidents caused by blurred vision. It can also reduce the local temperature inside the car, preventing the dashboard, steering wheel and other parts from getting too hot due to sun exposure, thus improving ride comfort. In addition, it can protect the interior of the car and reduce the aging and fading damage to materials such as seats and center console caused by direct sunlight.

[0003] The pull-out mechanism of a sun visor typically includes a sliding guide rail, a pull-out support rod, and a support rod cap slider. The sliding guide rail has an inner cavity, and the support rod cap slider is connected to the inner cavity. The pull-out support rod passes through the support rod cap slider, allowing the support rod cap slider to drive the sliding guide rail to rotate around the pull-out support rod. In use, the sliding guide rail can be pulled away from the side of the pull-out support rod, causing the support rod cap slider to move relative to the inner cavity, thus bringing the sliding guide rail to the desired position. Similarly, after use, the sliding guide rail can be pushed back towards the pull-out support rod, causing the support rod cap slider to move relative to the inner cavity, thus returning the sliding guide rail to its original position. In the prior art, the connection between the support rod cap slider and the inner cavity often adopts an interference fit design. This fitting method can effectively lock the relative position of the support rod sleeve slider and the inner cavity in the early stages of use, but it has obvious defects: on the one hand, the force required for assembly is large, making operation inconvenient; on the other hand, with wear during use, the original interference fit will irreversibly turn into a clearance fit, eventually causing the support rod sleeve slider and the inner cavity to loosen, and at the same time losing the damping function. Utility Model Content

[0004] In view of the above problems, this application provides a pull-out mechanism for a sun visor to solve the above problems.

[0005] To achieve the above objectives, the inventor provides a pull-out mechanism for a sun visor, comprising:

[0006] The sliding guide rail has an internal cavity;

[0007] At least one rod sleeve slider is disposed in the inner cavity; one end of the rod sleeve slider is provided with an elastic protrusion corresponding to the inner cavity, so as to make an interference fit with the inner cavity through the elastic protrusion;

[0008] A pull-out support rod is inserted through the other end of the support rod sleeve slider, so that the support rod sleeve slider can drive the sliding guide rail to rotate around the pull-out support rod; and the support rod sleeve slider drives the pull-out support rod to move relative to the inner cavity.

[0009] Furthermore, the elastic protrusions are respectively provided on the upper and lower surfaces of one end of the support rod sleeve slider.

[0010] Furthermore, the elastic protrusions are therefore arc-shaped or arch-shaped.

[0011] Furthermore, one end of the support rod sleeve slider is provided with at least one first protrusion on the side of the inner cavity.

[0012] Furthermore, the first protrusion is arc-shaped.

[0013] Furthermore, the other end of the support rod sleeve slider is provided with at least one second protrusion corresponding to the inner cavity.

[0014] Furthermore, the second protrusion is arc-shaped.

[0015] Furthermore, the inner cavity is provided with a foolproof guide rib, and the support rod sleeve slider is provided with a foolproof guide opening corresponding to the foolproof guide rib, and the foolproof guide opening is in clearance fit with the foolproof guide rib.

[0016] Furthermore, the support rod sleeve slider has two parts, which are connected by a connecting rod.

[0017] A vehicle sun visor, employing the sun visor's pull-out mechanism.

[0018] Unlike existing technologies, the above-mentioned technical solution incorporates an elastic protrusion structure on the outer surface of the support rod sleeve slider. This protrusion's inherent elastic deformation capability allows it to form an interference fit with the corresponding sliding guide inner cavity. During assembly, the elastic protrusion adapts to external forces, effectively offsetting the enormous assembly force required for traditional interference fits and reducing operational difficulty. In use, the elastic protrusion recovers its deformation and continuously applies stable pressure to the inner cavity wall, ensuring reliable locking between the support rod sleeve slider and the inner cavity. When wear occurs on the mating surfaces during the pulling process, the elastic reserve of the protrusion can promptly compensate for the gap caused by wear, preventing irreversible failure of the fit relationship due to wear in traditional interference fits.

[0019] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0020] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this utility model and other related contents, and should not be considered as limitations on this application.

[0021] In the accompanying drawings of the instruction manual:

[0022] Figure 1 This is a schematic diagram of the pull-out mechanism of the sunshade as described in the specific embodiment;

[0023] Figure 2 This is a front view of the pull-out mechanism structure of the sunshade as described in the specific embodiment;

[0024] Figure 3 for Figure 2 Sectional view at point AA;

[0025] Figure 4 This is a schematic diagram of the support rod sleeve slider structure described in the specific implementation method;

[0026] Figure 5 This is a schematic diagram of the support rod sleeve slider structure described in a specific embodiment.

[0027] The reference numerals used in the above figures are explained as follows:

[0028] 10. Pull-out support rod;

[0029] 20. Sliding guide rail;

[0030] 201. Inner cavity; 202. Anti-foolproof guide rib;

[0031] 30. Support rod sleeve slider;

[0032] 301. Elastic protrusion; 302. First protrusion; 303. Second protrusion; 304. Foolproof guide opening;

[0033] 40. Connecting rod. Detailed Implementation

[0034] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0035] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0036] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0037] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0038] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0039] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0040] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0041] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0042] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral arrangement; it can be a direct connection or an indirect connection through an intermediate medium; it can be a relationship of two components combined together, an interaction relationship between two components, or a connection within two structures. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0043] See Figures 1-5 As shown, a pull-out mechanism for a sun visor utilizes an elastic protrusion 301 structure on the outer surface of the support rod sleeve slider 30. The elastic protrusion 301's inherent elastic deformation capability allows it to form an interference fit with the inner cavity 201 of the corresponding sliding guide rail 20. During assembly, the elastic protrusion 301 can adaptively deform under external force, effectively offsetting the enormous assembly force required for traditional interference fits and reducing operational difficulty. In use, the elastic protrusion 301 recovers its deformation and continuously applies stable pressure to the wall of the inner cavity 201, achieving reliable locking between the support rod sleeve slider 30 and the inner cavity 201. When wear occurs on the mating surfaces during the pull-out process, the elastic reserve of the elastic protrusion 301 can promptly compensate for the gap caused by wear, preventing irreversible failure of the traditional interference fit due to wear. This solves the problems of large assembly force and inconvenient operation associated with traditional interference fits, prevents loosening after wear through the elastic compensation mechanism, maintains stable damping function, and significantly improves the service life and reliability of the connection structure.

[0044] The following combination Figures 1-5 An embodiment of a pull-out mechanism for a sun visor is provided, comprising:

[0045] The sliding guide rail 20 has an inner cavity 201;

[0046] At least one rod sleeve slider 30 is disposed in the inner cavity 201; one end of the rod sleeve slider 30 is provided with an elastic protrusion 301 corresponding to the inner cavity 201, so as to allow the elastic protrusion 301 to be interference-fitted with the inner cavity 201.

[0047] The pull-out support rod 10 is inserted through the other end of the support rod sleeve slider 30, so that the support rod sleeve slider 30 can drive the sliding guide rail 20 to rotate around the pull-out support rod 10; and the support rod sleeve slider 30 drives the pull-out support rod 10 to move relative to the inner cavity 201.

[0048] The outer surface of the sliding guide rail 20 can be connected to the sun visor body through adaptable fixing methods such as bolt fastening, snap-fit ​​fitting or adhesive bonding, so that when the support rod sleeve slider 30 can drive the sliding guide rail 20 to rotate around the pull-out support rod 10, the sliding guide rail 20 synchronously drives the sun visor body to flip through the fixed connection structure to achieve angle adjustment.

[0049] The aforementioned elastic protrusion 301 refers to an elastic protrusion 301 structure with deformation capability. The top of the elastic protrusion 301 can form point, line, or surface contact with the inner cavity 201. Preferably, the top of the protrusion forms point or line contact with the inner cavity 201. Point or line contact significantly reduces the contact area compared to surface contact, which can effectively reduce the frictional resistance during assembly and pulling. Combined with the adaptive deformation capability of the elastic bridge, it can further reduce the external force required for pulling or assembly, solving the pain point of "large assembly force and inconvenient operation" of traditional interference fit, and improving assembly efficiency and ease of operation. Specifically, the elastic protrusion 301 can be, but is not limited to, arc-shaped, arch-shaped, or wedge-shaped.

[0050] See Figures 3-5 As shown, the root of the aforementioned elastic protrusion 301 can be directly connected to the support rod sleeve slider 30 to form an angle, or a rounded surface can be used to transition to enhance the connection strength between the elastic protrusion 301 and the support rod sleeve slider 30. The rounded surface transition has one end naturally connected to the surface of the slider body, and the other end smoothly extends to the arc-shaped side of the protrusion, so that the connection area between the elastic protrusion 301 and the support rod sleeve slider 30 forms a "gradual" force transmission path, effectively dispersing the stress concentrated at the root during assembly and pulling (elastic deformation), avoiding root cracking or breakage due to stress concentration, and ensuring the structural stability of the elastic protrusion 301 during repeated deformation. Taking the arch-shaped elastic protrusion 301 as an example, the connection between the root of the elastic protrusion 301 and the support rod sleeve slider 30 is rounded. At the same time, the root of the elastic protrusion 301 extends to the top with a gentle slope transition, which not only preserves the elastic deformation space of the arch-shaped protrusion, but also expands the connection contact area between the root and the support rod sleeve slider 30 through the gentle slope, thereby improving the fatigue strength against repeated deformation.

[0051] In some embodiments, the elastic protrusion 301 can be integrally formed with the support rod sleeve slider 30. This integral forming process can be achieved by simultaneously processing the two using injection molding, die casting, or other methods, eliminating the need for subsequent connection. This simplifies the process, enhances structural integrity, and ensures uniform force transmission during elastic deformation. In some embodiments, the elastic protrusion 301 and the support rod sleeve slider 30 can be separately formed and then connected via threaded connections, welding, or other fixing methods. This facilitates the later replacement of the easily damaged elastic protrusion 301.

[0052] In use, when the sliding guide rail 20 is pulled away from the side of the pull-out support rod 10, the support rod sleeve slider 30 moves relative to the inner cavity 201, thereby causing the sliding guide rail 20 to reach the expected position. Similarly, when the sliding guide rail 20 is pushed into the side of the pull-out support rod 10, the support rod sleeve slider 30 moves relative to the inner cavity 201, thereby causing the sliding guide rail 20 to return to its original position.

[0053] One or more elastic protrusions 301 can be provided. When multiple elastic protrusions 301 are provided, their shapes and sizes can be the same or different. The distribution of multiple elastic protrusions 301 can be set according to requirements. See also Figure 3 and Figure 5 As shown, in some embodiments, the elastic protrusions 301 are respectively provided on the upper and lower surfaces of one end of the support rod sleeve slider 30; the number of elastic protrusions 301 on the upper and lower surfaces of one end of the support rod sleeve slider 30 may be the same or different. The elastic protrusions 301 on the upper and lower surfaces of one end of the support rod sleeve slider 30 are preferably in a one-to-one correspondence (they can be located at the middle of the upper and lower surfaces of one end of the support rod sleeve slider 30). This ensures that the contact points of the elastic protrusions 301 with the upper and lower walls of the inner cavity 201 are precisely aligned, forming a balanced contact pressure. When the support rod sleeve slides into the inner cavity 201, the elastic protrusions 301 on the upper and lower surfaces of one end of the support rod sleeve slider 30 undergo elastic deformation simultaneously, applying equal and opposite elastic restoring forces to the upper and lower walls of the inner cavity 201 respectively. This avoids the force offset problem that is prone to occur in the traditional single-sided protrusion design. During the reciprocating pulling process of the support rod sleeve slider 30, the symmetrical elastic protrusions 301 can always keep the slider in the center position of the inner cavity 201, effectively suppressing the tilting or jamming phenomenon of the support rod sleeve slider 30 caused by uneven force on one side, and ensuring the smoothness of the support rod sleeve slider 30 process. At the same time, it can further enhance the stability of the fit. The contact points of the upper and lower surfaces of one end of the support rod sleeve slider 30 form a "bidirectional constraint". Compared with single-sided contact, it can more reliably lock the relative position of the support rod sleeve slider 30 and the inner cavity 201, reduce the movement of the support rod sleeve slider 30 under vibration or impact conditions, and when the elastic protrusion 301 on the upper or lower surface is slightly worn, the elastic protrusion 301 on the other surface can compensate through elastic deformation to maintain the interference of the overall fit, indirectly extending the overall service life of the elastic protrusion 301.

[0054] See Figure 5As shown, in some embodiments, at least one first protrusion 302 may be provided at one end of the support rod sleeve slider 30 corresponding to the side of the inner cavity 201. The first protrusion 302, through a structural design of "partial contact instead of full contact," effectively reduces the actual contact area between one end of the support rod sleeve slider 30 and the side of the inner cavity 201, thereby significantly reducing frictional resistance during assembly and pulling. Specifically, the first protrusion 302 can form a point, line, or surface contact with the side of the inner cavity 201. It can adopt arc-shaped, arched, or narrow-faced structural forms. During the pulling process, the first protrusion 302 always maintains contact with and slides against the side wall of the inner cavity 201. The radial preload of the first protrusion 302 maintains the stability of the slider, and the small contact area reduces frictional loss during sliding, avoiding the "jamming" phenomenon that easily occurs with full contact, making the pulling operation more effortless and convenient. One or more first protrusions 302 may be provided. When multiple first protrusions 302 are provided, their shape and size may be the same or different. The distribution of multiple first protrusions 302 can be set according to requirements.

[0055] See Figure 4 As shown, in some embodiments, the other end of the support rod sleeve slider 30 is provided with at least one second protrusion 303 corresponding to the inner cavity 201. The second protrusion 303, through a structural design of "partial contact instead of full contact," effectively reduces the actual contact area between the other end of the support rod sleeve slider 30 and the side of the inner cavity 201, thereby significantly reducing frictional resistance during assembly and pulling. Specifically, the second protrusion 303 can form a point, line, or surface contact with the side of the inner cavity 201. It can adopt arc-shaped, arched, or narrow-faced structural forms. During the pulling process, the second protrusion 303 always maintains contact with and slides against the side wall of the inner cavity 201. The radial preload of the second protrusion 303 maintains the stability of the support rod sleeve slider 30, and the small contact area reduces frictional loss during sliding, avoiding the "jamming" phenomenon that easily occurs with full contact, making the pulling operation more effortless and convenient. One or more second protrusions 303 can be provided. When multiple second protrusions 303 are provided, their shapes and sizes can be the same or different. The distribution of multiple second protrusions 303 can be set according to requirements.

[0056] It should be noted that the first protrusion 302 and the second protrusion 303 can have the same or different shapes and sizes. This design flexibility is mainly determined based on the differences in their functional positioning and the requirements of actual application scenarios. Both serve the functions of radial positioning, anti-swaying, and assisting in reducing frictional resistance.

[0057] See Figure 2As shown, in practical applications, since the upper and lower surfaces of the support rod sleeve slider 30 are provided with elastic protrusions 301 that are structurally and functionally adapted, if the upper and lower surfaces are installed in reverse order during assembly, the elastic protrusions 301 and the inner cavity 201 will be misaligned. This will not only prevent reliable interference locking and damping control, but may also cause the protrusions to break or the inner cavity 201 to be scratched due to abnormal force. Therefore, a foolproof guide rib 202 can be provided in the inner cavity 201 of the sliding guide rail 20, and a foolproof guide opening 304 can be opened at the corresponding position of the support rod sleeve slider 30 with clearance fit. The foolproof guide rib 202 can be in the form of a long strip protrusion. The corresponding foolproof guide opening 304 is a notch that precisely matches the contour of the rib, so that the support rod sleeve slider 30 can only be inserted into the inner cavity 201 in the only correct posture. When attempting to install it in reverse, the contour of the foolproof guide opening 304 and the foolproof guide rib 202 cannot be aligned, and the support rod sleeve slider 30 cannot be inserted smoothly, thus physically blocking the reverse installation operation. The clearance fit (such as the clearance amount controlled at 0.1-0.3mm) not only avoids assembly jamming caused by excessive tightness, but also provides precise guidance for the slider insertion, ensuring that the elastic protrusion 301 is precisely aligned with the upper and lower walls of the inner cavity 201.

[0058] See Figures 4-5 As shown, there can be multiple support rod sleeve sliders 30. In some embodiments, there are two support rod sleeve sliders 30 connected by a connecting rod 40. Compared to the drawback of concentrated force on a single support rod sleeve slider 30, the two support rod sleeve sliders 30, after being fixed together by the connecting rod 40, can be arranged at intervals along the length of the inner cavity 201 of the sliding guide rail 20. This allows the driving force, rotational torque, and radial load transmitted by the pull-out support rod 10 to be evenly distributed to the two sliders through the connecting rod 40. Then, the elastic protrusions 301 of the two sliders act synchronously on the inner cavity 201 wall, achieving a uniform distribution of pressure on the mating surface. This avoids excessive wear and deformation failure of the elastic protrusions 301 due to excessive local load on a single support rod sleeve slider 30, and ensures the stability of the interference fit, significantly extending the service life of the mating structure.

[0059] This application also provides a vehicle sun visor that utilizes the aforementioned sun visor pull-out mechanism. The unfolding range and flipping angle of the sun visor can be quickly adjusted according to the angle of sunlight. Pulling out the support rod 10 drives the double sliders to move along the inner cavity 201 of the sliding guide rail 20. The interference fit of the elastic protrusion 301 allows the sun visor to remain stably in any adjustable position, preventing positional movement due to vibration even when the vehicle travels on bumpy roads.

[0060] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A pull-out mechanism for a sun visor, characterized in that, include: The sliding guide rail has an internal cavity; At least one rod sleeve slider is disposed in the inner cavity; one end of the rod sleeve slider is provided with an elastic protrusion corresponding to the inner cavity, so as to make an interference fit with the inner cavity through the elastic protrusion; A pull-out support rod is inserted through the other end of the support rod sleeve slider, so that the support rod sleeve slider can drive the sliding guide rail to rotate around the pull-out support rod; and the support rod sleeve slider drives the pull-out support rod to move relative to the inner cavity.

2. The pull-out mechanism of the sunshade according to claim 1, characterized in that, Therefore, the elastic protrusions are respectively set on the upper and lower surfaces of one end of the support rod sleeve slider.

3. The pull-out mechanism of the sunshade according to claim 1, characterized in that, Therefore, the elastic protrusions are arc-shaped or arch-shaped.

4. The pull-out mechanism of the sunshade according to claim 1, characterized in that, One end of the support rod sleeve slider is provided with at least one first protrusion corresponding to the side of the inner cavity.

5. The pull-out mechanism of the sunshade according to claim 4, characterized in that, The first protrusion is arc-shaped.

6. The pull-out mechanism of the sunshade according to claim 1, characterized in that, The other end of the support rod sleeve slider is provided with at least one second protrusion corresponding to the inner cavity.

7. The pull-out mechanism of the sunshade according to claim 6, characterized in that, The second protrusion is arc-shaped.

8. The pull-out mechanism of the sunshade according to claim 1, characterized in that, The inner cavity is provided with a foolproof guide rib, and the support rod sleeve slider is provided with a foolproof guide opening corresponding to the foolproof guide rib, and the foolproof guide opening is in clearance fit with the foolproof guide rib.

9. The pull-out mechanism of the sunshade according to claim 1, characterized in that, The support rod sleeve slider has two parts, which are connected by a connecting rod.

10. A vehicle sun visor, characterized in that, The sunshade pull-out mechanism according to any one of claims 1-9 is applied.

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