Vehicle table plate folding mechanism with angle adjusting function

Abstract

The utility model discloses an automobile table plate folding mechanism with an angle adjusting function, and relates to the field of automobile accessories, the automobile table plate folding mechanism comprises two supporting main rods which are symmetrically arranged and serve as table plate supporting main bodies, and mounting bases corresponding to the supporting main rods respectively, and the mounting bases are fixed to an automobile seat framework assembly. A first-stage hinge hole site and a second-stage hinge hole site which are axially distributed are axially distributed on the supporting main rod, and a first-stage fixed pivot and a second-stage fixed pivot which are matched with the first-stage hinge hole site and the second-stage hinge hole site are correspondingly arranged on the mounting base. A rotatable first-stage connecting rod is assembled between the first-stage hinge hole position and the first-stage fixing pivot, and a second-stage connecting rod is hinged between the second-stage hinge hole position and the second-stage fixing pivot. According to the folding mechanism, by introducing an angle adjusting mechanism, the defects in the prior art can be effectively overcome, the small table plate can be adjusted to a proper angle when the angle of the seat backrest changes, and therefore the use experience of passengers is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile accessories, in particular to a folding mechanism for a desk board with angle adjustment function for vehicles. BACKGROUND

[0002] In existing vehicles, the design of the small desk board of the seat for vehicles generally adopts a structure in a fixed horizontal state. This structure is usually achieved through a four-bar linkage mechanism between the mounting bracket and the desk board, so that when the desk board is flipped to a certain position, it can be kept horizontal and fixed, thereby meeting the needs of passengers for short-term work or dining during the journey. Although this design can meet the needs in simple use scenarios, in actual use, as the angle of the seat back changes, the position and angle of the desk board cannot be adjusted accordingly, which affects the use experience of passengers.

[0003] The main deficiency of this technology lies in its fixed design mode, which lacks flexibility. When passengers need to adjust the angle of the seat back, the traditional small desk board structure cannot adapt to this change, so it cannot adjust the angle of the desk board according to the angle of the seat. This not only makes the use of the desk board inconvenient, but also limits the freedom of passengers' activities in the vehicle, especially in the case of long-term travel, passengers need to adjust the seat position according to their comfort, but the desk board cannot meet this demand, resulting in a significant decline in use experience.

[0004] The root cause of this deficiency is that the design of the existing desk board mechanism is too simple and lacks the necessary angle adjustment function. Although the four-bar linkage mechanism can effectively fix the desk board in a horizontal position, it does not take into account the impact of seat angle changes on the position and angle of the desk board, resulting in the desk board being unable to adjust when the seat back is adjusted, greatly reducing the flexibility and comfort of use.

[0005] Therefore, it is particularly important to develop a folding mechanism for a desk board with angle adjustment function for vehicles. CONTENT OF THE INVENTION

[0006] The purpose of the present application is to at least overcome one deficiency of the prior art, and to provide a folding mechanism for a desk board with angle adjustment function for vehicles. The folding mechanism introduces an angle adjustment mechanism, which can effectively solve the deficiencies in the prior art, so that the small desk board can be adjusted to an appropriate angle when the angle of the seat back changes, thereby greatly improving the use experience of passengers.

[0007] To achieve the above object, the application discloses a table board folding mechanism with angle adjusting function for vehicle, which comprises two support main rods as table board support main bodies arranged symmetrically, and installation bases corresponding to the support main rods, which are fixed on a vehicle seat framework assembly. The support main rods are axially distributed with first and second hinge hole positions, and the corresponding installation bases are provided with first and second fixed pivots matched therewith. The first hinge hole position and the first fixed pivot are assembled with a rotatable first connecting rod, and the second hinge hole position and the second fixed pivot are hingedly connected with a second connecting rod. An adjusting assembly is arranged in parallel between the two support main rods and comprises a central adjusting gear, a rack type adjusting rod matched with the central adjusting gear, and a driving handle linked with the central adjusting gear, and the central adjusting gear can be driven to rotate by operating the driving handle. The rack type adjusting rod engaged with the central adjusting gear is inserted through a lateral guide groove of the support main rod, and the contact surface of the first connecting rod with the rack type adjusting rod is in a stepped limiting structure. The axial position of the rack type adjusting rod can be changed by gear transmission, the first connecting rod can be locked with different height stepped surfaces, and thus the table board angle can be adjusted.

[0008] Further, the first connecting rod bottom and the adjusting rod matched area are provided with a polyamide wear-resistant lining plate, and the surface of the corresponding stepped limiting structure is compounded with a wear-resistant layer of the same material, so that the adjusting noise is effectively reduced.

[0009] Further, the stepped limiting structure of the rack type adjusting rod adopts a progressive inclined surface connection design.

[0010] Further, the adjusting rod stepped surface and the first connecting rod bottom surface are both provided with a micro-ratchet anti-skid structure, and the angle locking stability is enhanced by tooth engagement.

[0011] Further, the first connecting rod and the second connecting rod are integrated with a damping bearing at the hinge position thereof.

[0012] Further, the central adjusting gear is a floating ratchet type adjusting gear, which comprises a gear body, a wave-shaped elastic washer, a reverse stop pawl and a compression spring. The adjusting gear is locked in one-way rotation by the reverse stop pawl in normal state, and the meshing can be released and the adjusting gear can be reversely rotated after being pressed downward.

[0013] Compared with the prior art, the angle adjusting mechanism is introduced, so that the small table board can be automatically adjusted to a suitable angle, the problem that the table board cannot adapt to the seat backrest adjustment in the prior art is solved, and the use convenience of passengers in different seat angles is greatly improved. Meanwhile, in the structure, the micro-ratchet anti-skid structure and the damping bearing are adopted, the locking stability of the table board after being adjusted to a specific angle is effectively enhanced by tooth engagement and damping effect, accidental change of the table board angle during use is avoided, and the safety and reliability of use are improved.

[0014] The above-listed benefits are not exhaustive of all advantages. Other potential benefits and detailed technical implementations will be further disclosed in the embodiments or other description sections of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0015] Aspects of the present disclosure will become more fully understood from the detailed description and accompanying drawings. The figures shown in the drawings are sometimes exaggerated, not to scale, to illustrate specific details of certain features shown therein, and, thus, are not intended to limit the scope of the present disclosure. In the drawings:

[0016] Figure 1 is a structural schematic diagram of an embodiment of the present disclosure. DETAILED DESCRIPTION

[0017] The present disclosure will be described with respect to the drawings in which some embodiments of the present disclosure are shown. It is to be understood that the present disclosure can assume various different embodiments and is not limited to the embodiments described hereinafter; in fact, the embodiments described hereinafter are intended to make the present disclosure more complete and to fully convey the scope of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0018] It should be understood that, in all the drawings, the same reference numerals indicate the same elements. In the drawings, the dimensions of some features can be distorted for the sake of clarity.

[0019] It should be understood that the language used in the specification is only used to describe specific embodiments and is not intended to limit the present disclosure. Unless otherwise defined, all terms (including technical and scientific terms) used in the specification have meanings commonly understood by those skilled in the art. For the sake of brevity and / or clarity, techniques, methods, and apparatuses known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the description of the present disclosure.

[0020] As used in the specification, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. As used in the specification, the terms "comprises", "comprising", and "including" mean that the stated features are included, but not that one or more features are excluded. As used in the specification, the term "and / or" includes any and all combinations of one or more of the associated listed items. EMBODIMENTS

[0021] Referring to the drawings Figure 1The embodiment relates to a folding mechanism with an angle adjusting function for a table plate of a vehicle, which is composed of two symmetrical support main rods 1, a corresponding mounting base 2, a first connecting rod 3, a second connecting rod 4 and an adjusting assembly 5, and the folding mechanism realizes flexible adjustment and stable support of the angle of the table plate through mutual cooperation between the components.

[0022] Specifically, the support main rod 1 is used as a support main body of the table plate, and the material of the support main rod 1 is high-strength aluminum alloy, which guarantees sufficient support strength and has relatively light weight, so that the vehicle seat is not excessively burdened. The support main rod 1 is in a strip shape and has an L-shaped cross section, and a first hinge hole position 101 and a second hinge hole position 102 are distributed on the vertical surface of the support main rod 1 in an axial direction.

[0023] The mounting base 2 is made of solid steel and is fixed on a vehicle seat frame assembly through bolts, and the mounting base 2 is provided with a first fixed pivot 201 and a second fixed pivot 202 matched with the hole positions of the support main rod 1, and the surface of the pivot is subjected to quenching treatment, so that the wear resistance and strength of the pivot are improved, and the pivot can bear the friction force and pressure generated when the connecting rod rotates.

[0024] The first connecting rod 3 and the second connecting rod 4 are made of high-quality carbon structural steel and have good toughness and mechanical strength. The first connecting rod 3 is assembled between the first hinge hole position 101 and the first fixed pivot 201, and clearance fit is adopted during assembly, so that the first connecting rod can rotate flexibly around the pivot, thereby realizing the basic folding function of the table plate. The second connecting rod 4 is hingedly connected between the second hinge hole position 102 and the second fixed pivot 202, and reasonable clearance fit is also adopted, so that the second connecting rod 4 can keep stable and flexibly respond to the folding action of the table plate during rotation, and cooperates with the first connecting rod 3 to provide a stable support structure for the table plate.

[0025] In the embodiment, the adjusting assembly 5 is parallelly arranged between the two support main rods 1 and is a key part for realizing fine adjustment of the angle of the table plate. The adjusting assembly 5 includes a center adjusting gear 501 and a rack type adjusting rod 502.

[0026] Specifically, the rack type adjusting rod 502 meshing with the center adjusting gear 501 is inserted into a lateral guide groove of the support main rod 1, the inner wall of the guide groove is subjected to grinding processing and is smooth, and low-friction sliding fit is formed between the rack type adjusting rod 502 and the guide groove. The material of the rack type adjusting rod 502 is quenched steel, and the teeth are subjected to precise machining and are accurately matched with the tooth shape of the center adjusting gear 501, so that the accuracy of transmission is guaranteed.

[0027] The contact surface of the rack type adjusting rod 502 with the first level link 3 is a stepped limiting structure. This structure ingeniously uses stepped surfaces of different heights to realize the positioning of the table board at different angles. By changing the axial position of the rack type adjusting rod 502 through gear transmission, the bottom of the first level link 3 is provided with a polyamide wear-resistant lining plate in the matching area of the rack type adjusting rod 502. The lining plate has excellent wear resistance and self-lubricating property, which can effectively reduce the friction coefficient between the first level link and the adjusting rod and reduce the adjusting noise. On the opposite side of the above structure, the corresponding stepped limiting structure surface is compounded with a wear-resistant layer of the same material, which further enhances the wear resistance of the two and prolongs the service life.

[0028] In addition, the stepped limiting structure of the rack type adjusting rod 502 adopts a progressive slope connection design, so that the first level link 3 is more smooth when cooperating with stepped surfaces of different heights, avoiding the phenomenon of table board angle adjustment jam caused by sudden change of stepped surface height. At the same time, the stepped surface of the adjusting rod and the bottom surface of the first level link 3 are both provided with a micro-ratchet anti-skid structure (not shown in the figure). These tiny ratchets are pressed by high-precision molds, with clear and uniform tooth patterns. Through the biting action between the tooth patterns, the stability of angle locking is greatly enhanced. Even if the vehicle encounters bumps or shakes during driving, the table board can remain at the set angle position and will not easily slide or deflect.

[0029] On the basis of the above structure, the first level link 3 and the second level link 4 are integrated with a damping bearing at their hinge joints. The damping bearing is made of high-performance rubber and metal composite material, which can provide appropriate damping force when the link rotates, making the table board move more smoothly and slowly during folding and unfolding, avoiding impact or damage caused by too fast movement, and also improving the operation experience of the user.

[0030] In the preferred embodiment, the center adjusting gear 501 adopts a floating ratchet type design, which ingeniously integrates the functions of gear transmission and ratchet reverse prevention. The gear body of the adjusting gear is processed by a high-precision machine tool, with high tooth shape precision. The wave-shaped elastic washer matched with it can effectively compensate the axial gap of the gear during transmission, ensuring the stability of transmission. The reverse pawl is controlled by precise spring force, tightly engaged in a specific tooth groove of the gear body in normal state, realizing one-way rotation locking and preventing the table board from changing angle accidentally due to external force during use. When it is necessary to adjust the angle of the table board, press the driving center adjusting gear 501 and drive the handle to make the center adjusting gear 501 go down through the mechanical linkage mechanism, releasing the engagement of the reverse pawl. At this time, the center adjusting gear 501 can be rotated in reverse, thereby driving the entire adjusting assembly to work.

[0031] In actual use scenarios, when the passenger needs to use the table board, first, the passenger drives the center adjusting gear 501 to rotate by operating the driving handle, and then the rack adjusting rod 502 is axially moved along the lateral guide groove of the support main rod 1, so that the first-order connecting rod is locked with the corresponding height step surface of 3, thereby determining the basic elevation angle of the table board. Then, the passenger can adjust the angle of the table board according to the passenger's own needs by adjusting the driving handle again, and at this time, the one-way rotation locking function of the center adjusting gear 501 ensures that the table board can be stably maintained after being adjusted to the appropriate position. For example, when the passenger needs to use a notebook computer on the table board, the passenger can adjust the table board to a higher elevation angle to obtain a more comfortable use posture; when placing some light objects or reading documents, the passenger can adjust the table board to a lower elevation angle to increase the stability of the table board. In addition, the angle adjustment is also to adapt to the angle deviation after the angle adjustment of the seat backrest,

[0032] Compared with the traditional folding mechanism of the vehicle table board, the mechanism in the embodiment not only can realize the folding function of the table board, but also can flexibly adjust the elevation angle of the table board within a certain range, and has good stability and durability, effectively improving the convenience and comfort of the passenger using the table board in the vehicle, meeting the needs of different passengers in different use scenarios, and having significant practical value and market promotion prospects.

[0033] Although the exemplary embodiments of the present disclosure have been described, those skilled in the art should understand that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included in the protection scope of the present disclosure defined by the claims. The present disclosure is limited by the appended claims, and the equivalents of these claims are also included.

Claims

1. A folding mechanism for a vehicle table with angle adjustment function, characterized in that, The application relates to a table board supporting mechanism of a car seat, which comprises two supporting main rods arranged symmetrically as table board supporting bodies, and mounting bases corresponding to the supporting main rods, wherein the mounting bases are fixed to a car seat framework assembly. The supporting main rods are axially provided with axially distributed first and second hinge hole positions, and the corresponding mounting bases are provided with first and second fixed pivots matched with the first and second hinge hole positions; the first hinge hole position and the first fixed pivot are assembled with a rotatable first connecting rod; and the second hinge hole position and the second fixed pivot are hingedly connected with a second connecting rod. The adjusting assembly is arranged in parallel between the two supporting main rods and comprises a central adjusting gear, a rack type adjusting rod matched with the central adjusting gear and a driving handle linked with the central adjusting gear; the central adjusting gear can be driven to rotate by operating the driving handle. The rack type adjusting rod matched with the central adjusting gear is inserted into a lateral guide groove of the supporting main rod in a penetrating mode, and the contact surface of the rack type adjusting rod and the first connecting rod is provided with a stepped limiting structure; the axial position of the rack type adjusting rod can be changed through gear transmission, the first connecting rod can be locked with different height stepped surfaces, and the table board angle can be adjusted.

2. A desk board folding mechanism for a vehicle with an angle adjustment function as claimed in claim 1, characterized in that, The first connecting rod bottom and the adjusting rod matched area are provided with a polyamide wear-resistant lining plate, and the corresponding stepped limiting structure surface is compounded with a wear-resistant layer of the same material.

3. A desk board folding mechanism for a vehicle with an angle adjustment function as defined in claim 1, characterized in that, The stepped limiting structure of the rack type adjusting rod adopts a progressive inclined surface connection design.

4. The desk board folding mechanism with angle adjustment function for vehicle as claimed in claim 1, wherein The adjusting rod stepped surface and the first connecting rod bottom surface are both provided with a micro-ratchet anti-skid structure, and the angle locking stability is enhanced through tooth pattern engagement.

5. The desk board folding mechanism with angle adjustment function for vehicle as claimed in claim 1, wherein The first connecting rod and the second connecting rod are integrated with a damping bearing at the hinge position.

6. A desk board folding mechanism for a vehicle with an angle adjustment function as defined in claim 1, characterized in that The central adjusting gear is a floating ratchet type adjusting gear, which is composed of a gear body, a wave-shaped elastic washer, a reverse stop pawl and a compression spring; the adjusting gear is locked in one-way rotation under normal state through the reverse stop pawl, and the meshing can be released and the adjusting gear can be reversely rotated after being pressed downward.

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