Automobile seat back plate device with angle adjusting table plate

Abstract

The utility model discloses an automobile seat back plate device with an angle adjusting table plate, and relates to the field of automobile spare parts, an automobile seat back assembly comprises a back plate body and a table plate pivoted to the back plate body, and the table plate and the back plate body form a kinematic pair through a multi-stage positioning hinge mechanism; the multi-stage positioning hinge mechanism comprises two bearing base rods which are symmetrically arranged, two mounting bases which are matched with the bearing base rods in an aligned manner, and an angle adjusting mechanism. According to the device, through innovative structural design, the function of flexibly adjusting the table plate angle is achieved, the problems that a traditional small table plate of an automobile seat cannot be kept horizontal, use is inconvenient and comfort is poor due to adjustment of the seat backrest angle can be effectively solved, the requirements of passengers for table plate use at different seat backrest angles are met, and the practicability is high. The use experience and the comfort degree of passengers are remarkably improved, and high practicability and market application value are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile parts, in particular to a backboard device of an automobile seat with an angle-adjustable table board. BACKGROUND

[0002] In modern transportation tools, especially in the design of automobile seats, the application of small table boards of vehicle seats is very widespread. The commonly used small table boards of automobile seats usually adopt a structure design of fixed horizontal state. This structure mainly realizes through a four-bar linkage mechanism between the installation support and the table board. When the table board is turned to a specific position, it can be kept horizontal and fixed, so as to meet the basic needs of passengers in the process of taking a car, such as short-term work, meal, and placing articles. However, this design of table board with fixed horizontal state has obvious limitations. In actual use, with the adjustment of the angle of the backrest of the automobile seat, the position and angle of the table board cannot be adjusted accordingly, which greatly affects the use experience of the passengers.

[0003] The main defect of this technology is its fixed design mode, which seriously lacks flexibility. When the passenger needs to adjust the angle of the seat backrest according to his own comfort, the traditional small table board structure cannot adapt to this change, and cannot adjust the angle of the table board according to the angle of the seat backrest. This not only makes the use of the table board extremely inconvenient, but also greatly limits the freedom of the passenger in the car, especially in the case of long-term car travel, the passenger needs to adjust the seat position according to his own comfort, but the table board cannot meet this demand, which leads to a significant decline in the use experience.

[0004] The root cause of this defect is that the design of the existing table board mechanism is too simple and lacks the necessary angle adjustment function. Although the four-bar linkage mechanism can effectively fix the table board at the horizontal position, it does not fully consider the influence of the change of the angle of the seat backrest on the position and angle of the table board, which leads to the fact that the table board cannot be adjusted when the seat backrest is adjusted, and the flexibility and comfort of the use of the table board are greatly reduced.

[0005] Therefore, it is particularly important to develop a table board folding mechanism in a backboard device of an automobile seat with an angle adjustment function to meet the needs of passengers in using the table board at different angles of the seat backrest and to improve the use experience and comfort of passengers. CONTENT OF THE INVENTION

[0006] The purpose of the present application is to at least overcome one of the deficiencies in the prior art, provide an automobile seat back plate device with an angle-adjustable table plate, which realizes flexible adjustment of the table plate angle through innovative structural design, effectively solves the problems of the traditional automobile seat small table plate caused by the seat backrest angle adjustment, such as the table plate cannot be kept horizontal, inconvenient to use, and poor comfort, meets the needs of passengers for table plate use under different seat backrest angles, significantly improves the passenger's use experience and comfort, and has high practicality and market application value.

[0007] To achieve the above-mentioned purpose, the present application discloses an automobile seat back plate device with an angle-adjustable table plate, which comprises a back plate body and a table plate pivotally connected thereto, wherein the table plate forms a kinematic pair with the back plate body through a multi-stage positioning hinge mechanism;

[0008] The multi-stage positioning hinge mechanism comprises two symmetrical load-bearing base bars, two mounting bases matched with the load-bearing base bars, and an angle adjustment mechanism;

[0009] The load-bearing base bar is inserted into the table plate and rigidly connected thereto by a fastener;

[0010] The fixed base is rigidly connected to the back plate body by a fastener;

[0011] The load-bearing base bar is provided with a first pivot hole and a second pivot hole, and the corresponding mounting base is provided with a third pivot hole and a fourth pivot hole in the height direction, a first connecting rod rotatable about an axis is arranged between the first pivot hole and the third pivot hole, and a second connecting rod is hingedly connected between the second pivot hole and the fourth pivot hole;

[0012] The angle adjustment mechanism is arranged between the two load-bearing base bars in the table plate, and comprises a center adjustment gear, a toothed adjustment rod meshing with the center adjustment gear, and a rotation control knob connected to the center adjustment gear;

[0013] The rotation control knob is at least partially exposed to the table plate operation window, and the center adjustment gear can be driven to rotate by the rotation control knob;

[0014] The toothed adjustment rod meshing with the center adjustment gear is inserted into the load-bearing base bar from the side and abuts against the bottom surface of the first connecting rod;

[0015] The matching surface of the toothed adjustment rod and the first connecting rod has a multi-stage positioning surface step structure varying in the height direction, and the multi-stage positioning surface step structure is used to adjust the matching angle of the first connecting rod and the load-bearing base bar;

[0016] The central adjusting gear changes the axial displacement of the toothed adjusting rod through the rack drive, realizes the adjustment of the cooperation of the first connecting rod and the different hierarchical positioning surfaces in the stepped structure, and thus accurately controls the pitch angle of the table plate relative to the back plate body.

[0017] Further, the first connecting rod bottom and the adjusting rod cooperation area are provided with a polyamide wear-resistant lining plate, and correspondingly, the surface of the stepped structure of the toothed adjusting rod is compounded with a polyamide wear-resistant layer, which effectively reduces the adjusting noise.

[0018] Further, in the stepped structure of the rack type adjusting rod, the adjacent hierarchical positioning surfaces are connected through inclined surfaces.

[0019] Further, the surface of the stepped structure of the toothed adjusting rod and the bottom surface of the first connecting rod are both provided with a micro-ratchet anti-skid structure, and the angle locking stability is enhanced through the tooth engagement.

[0020] Further, the first connecting rod and the second connecting rod are integrated with a damping bearing in the shaft position thereof.

[0021] Further, the table plate comprises a bottom and a panel, and the panel is locked on the bottom.

[0022] In some embodiments, the central adjusting gear is installed in the table plate through a shaft member with damping.

[0023] In another embodiment, 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 stopping pawl and a compression spring. The adjusting gear is locked in one-way rotation by the reverse stopping pawl in the normal state, and can be disengaged and rotated in the opposite direction after being pressed downward.

[0024] Compared with the prior art, through the innovative multi-level positioning hinged mechanism and the angle adjusting mechanism, the table plate can accurately adjust the angle according to the angle change of the seat back, effectively solving the problem that the traditional table plate cannot adapt to the adjustment of the seat back. When the passenger adjusts the seat back to pursue comfort, the table plate can flexibly change the angle, always maintaining the horizontal or optimal state meeting the use requirements, greatly improving the convenience and comfort of the table plate use, meeting the use requirements of the passenger for the table plate in different riding postures, and providing a good use experience for the passenger whether in long-time riding or short-distance travel.

[0025] The above listed beneficial effects are not exhaustive of all advantages. Other potential beneficial effects and detailed technical implementation modes will be further disclosed in the embodiments or other description parts of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] A better understanding of various aspects of this disclosure will be achieved by reading the following detailed description in conjunction with the accompanying drawings. The positions, dimensions, and extents of the structures shown in the drawings, etc., do not always represent actual positions, dimensions, and extents. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of one embodiment disclosed in this application.

[0028] Figure 2 This is a schematic diagram of the structure of one embodiment disclosed in this application from another perspective.

[0029] Figure 3 This is a schematic diagram of one embodiment disclosed in this application, with the panel removed.

[0030] Figure 4 yes Figure 3 Enlarged view of point A in the image.

[0031] Figure 5 This is a schematic diagram of the structure of a multi-stage positioning hinge mechanism in one embodiment of this application. Detailed Implementation

[0032] The present disclosure will now be described with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure more complete and to fully illustrate the scope of protection 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 further additional embodiments.

[0033] It should be understood that the same reference numerals denote the same elements in all the accompanying drawings. For clarity, the dimensions of certain features may be modified in the drawings.

[0034] It should be understood that the terminology used in this specification is for describing specific embodiments only and is not intended to limit this disclosure. All terms used in this specification (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. For the sake of brevity and / or clarity, techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail; however, where appropriate, such techniques, methods, and apparatus should be considered part of this specification.

[0035] As used in the specification, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. The terms "comprises," "comprising," "includes," "including," and "contains," as used in the specification, are intended to be open-ended terms i.e., to mean that the listed item includes at least the recited item and that additional items can also be present. The terms "consisting of" and "consisting essentially of" as used herein mean that the composition, method or process claimed excludes any element other than those recited in the claim.

[0036] The following is a specific embodiment of a car seat back plate device with an angle-adjustable table plate:

[0037] Referring to the accompanying drawings Figures 1 to 5 The components of the device include a back plate body 1 and a table plate 2 pivotally connected to the back plate body 1. The table plate 2 and the back plate body 1 form a kinematic pair through a multi-stage positioning hinge mechanism 3, thereby achieving flexible adjustment of the angle of the table plate.

[0038] The multi-stage positioning hinge mechanism 3 is composed of two symmetrically arranged load-bearing base bars 301, two mounting bases 302 matched with the load-bearing base bars 301, and an angle adjustment mechanism 303. The load-bearing base bars 301 are made of high-strength aluminum alloy material, which has good strength and toughness, and is relatively light in quality. After being inserted into the table plate 2, they are rigidly connected to the table plate 2 through fasteners, ensuring the stability of the connection.

[0039] The mounting bases 302 are also made of high-strength aluminum alloy material and are rigidly connected to the back plate body 1 through fasteners, providing stable support for the entire hinge mechanism.

[0040] The load-bearing base bars 301 are provided with a first pivot hole 304 and a second pivot hole 305, and the corresponding mounting bases 302 are provided with a third pivot hole 306 and a fourth pivot hole 307 in the height direction. The first pivot hole 304 and the third pivot hole 306 are fitted with a first connecting rod 308 that can rotate around the shaft, and the second pivot hole 305 and the fourth pivot hole 307 are hingedly connected to a second connecting rod 309.

[0041] In actual implementation, the first connecting rod 308 and the second connecting rod 309 are generally made of high-quality carbon steel material, which has high strength and wear resistance and can withstand large loads and frequent rotation operations.

[0042] The angle adjustment mechanism 303 is ingeniously arranged between the two load-bearing base bars 301 inside the table plate 2, and mainly includes a center adjustment gear 310, a toothed adjustment rod 311 meshing with the center adjustment gear 310, and a rotation control knob 312 connected to the center adjustment gear 310. The center adjustment gear 310 is made of high-quality alloy steel material, which has high hardness and wear resistance. It is installed inside the table plate 2 through a shaft with damping. The setting of the damping bearing makes the rotation control knob have good damping feeling during operation, improving the comfort and precision of operation.

[0043] The rotation control knob 312 is at least partially exposed to the operation window of the table plate 2, which is convenient for passengers to operate. The material of the rotation control knob 312 is engineering plastic, which has good strength and corrosion resistance. The rotation control knob 312 can drive the central adjusting gear to rotate.

[0044] The toothed adjusting rod 311 engaged with the central adjusting gear 310 is inserted into the bearing base rod 301 from the side and abuts with the bottom surface of the first connecting rod 308. The toothed adjusting rod 311 is made of high-strength alloy steel and is heat treated on the surface, which has high hardness and wear resistance. The surface of the toothed adjusting rod 311 has a stepped structure with multiple level positioning surfaces changing along the height direction. The adjacent level positioning surfaces are connected by inclined surfaces. This design enables the first connecting rod 308 to smoothly switch between different level positioning surfaces during adjustment, avoiding sudden jumps and impacts, and improving the stability and precision of adjustment. The surface of the stepped structure of the toothed adjusting rod 311 and the bottom surface of the first connecting rod 308 are both provided with micro-ratchet anti-slip structures, which enhance the angle locking stability through tooth engagement, ensuring that the table plate 2 can maintain the set angle position during vehicle driving and will not deviate due to factors such as vibration.

[0045] During operation of the embodiment, the central adjusting gear 310 changes the axial displacement of the toothed adjusting rod 311 through rack drive, and then adjusts the cooperation of the first connecting rod 308 with different level positioning surfaces in the stepped structure, thereby accurately controlling the pitch angle of the table plate 2 relative to the back plate body 1. In actual operation, passengers drive the central adjusting gear 310 to rotate by rotating the rotation control knob 312, the rotation of the central adjusting gear 310 drives the toothed adjusting rod 311 to move axially, and the movement of the toothed adjusting rod 311 enables the first connecting rod 308 to switch on different level positioning surfaces of the stepped structure, thereby changing the included angle of the first connecting rod with the bearing base rod 301, and finally adjusting the angle of the table plate 2.

[0046] More specifically, in the embodiment, the first connecting rod 308 is provided with a polyamide wear-resistant lining plate at the cooperation area with the toothed adjusting rod 311, and the surface of the stepped structure of the toothed adjusting rod 311 is compounded with a polyamide wear-resistant layer. The polyamide material has good wear resistance, which effectively reduces the adjustment noise and reduces the wear between components, prolonging the service life of the device.

[0047] In addition, in the preferred embodiment, the first connecting rod 308 and the second connecting rod 309 are integrated with damping bearings in their shaft positions. The damping bearings can provide appropriate resistance during the rotation of the connecting rod, making the table plate 2 more stable during angle adjustment, avoiding the impact and shaking caused by rapid rotation, and improving the comfort of passengers.

[0048] The table plate 2 comprises a bottom and a panel, the panel is made of high-strength plastic material, has good strength and corrosion resistance, and is locked on the bottom. The bottom is made of metal material, such as aluminum alloy, has high strength and rigidity, and provides stable support for the panel. This structure design makes the table plate 2 both light and strong, and is convenient for production and assembly.

[0049] In actual use scenarios, when the passenger needs to adjust the angle of the table plate, he or she only needs to rotate the rotation control knob 312 slightly, and then can adjust the table plate 2 to a suitable angle according to his or her comfort and use requirements. For example, in a long journey, the passenger can adjust the seat backrest to a relatively inclined angle, and at the same time adjust the table plate 2 to a position parallel to the thighs, so as to place a notebook computer for work or food for meal, greatly improving the passenger's use experience and comfort. Compared with the traditional fixed horizontal state of the automobile seat small table plate, the device can adapt to the change of the angle of the seat backrest, meet the use requirements of the passenger for the table plate in different riding postures, effectively solve the problem that the traditional table plate cannot be kept horizontal due to the adjustment of the angle of the seat backrest, is inconvenient to use, and has poor comfort, and has significant practical advantages and market application prospects.

[0050] 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 defined by the appended claims, and the equivalents of these claims are also included.

Claims

1. A backrest device for a car seat with an angularly adjustable table board, characterized in that The automobile seat backrest assembly comprises a backboard body and a table plate pivotally connected to the backboard body, wherein the table plate is connected to the backboard body through a multi-stage positioning hinge mechanism; The multi-stage positioning hinge mechanism comprises two symmetrical load base bars, two mounting bases matched with the load base bars, and an angle adjusting mechanism; The load base bars are inserted into the table plate and rigidly connected to the table plate through fasteners; The mounting bases are rigidly connected to the backboard body through fasteners; The load base bars are provided with first and second pivot holes, and the corresponding mounting bases are provided with third and fourth pivot holes matched with each other in the height direction, a first connecting rod rotatable around an axis is arranged between the first and third pivot holes, and a second connecting rod is arranged between the second and fourth pivot holes. The angle adjusting mechanism is arranged between the two load base bars in the table plate, and comprises a center adjusting gear, a toothed adjusting rod matched with the center adjusting gear, and a rotating control knob connected to the center adjusting gear; The rotating control knob is at least partially exposed to an operating window of the table plate, and the center adjusting gear can be driven to rotate through the rotating control knob; The toothed adjusting rod is inserted into the load base bar from the side and abuts against the bottom surface of the first connecting rod; The matching surface of the toothed adjusting rod and the first connecting rod has a stepped structure with multiple levels of positioning surfaces changing in the height direction, and the matching angle of the first connecting rod and the load base bar is adjusted through the multi-stage positioning stepped structure; The center adjusting gear changes the axial displacement of the toothed adjusting rod through a rack drive, adjusts the matching of the first connecting rod and the different levels of positioning surfaces in the stepped structure, and accurately controls the pitch angle of the table plate relative to the backboard body.

2. A vehicle seat backrest device with an angle-adjustable table board as defined in claim 1, characterized in that The first connecting rod bottom and the adjusting rod matching area are provided with a polyamide wear-resistant lining plate, and correspondingly, the stepped structure surface of the toothed adjusting rod is compounded with a polyamide wear-resistant layer, which effectively reduces the adjusting noise.

3. A vehicle seat backrest apparatus with an angle-adjustable table board as defined in claim 1, characterized in that In the stepped structure of the rack type adjusting rod, adjacent levels of positioning surfaces are connected through inclined surfaces.

4. A vehicle seat backrest apparatus with an angle-adjustable table board as defined in claim 1, characterized by The surface of the stepped structure of the toothed adjusting rod and the bottom surface of the first connecting rod are provided with micro-ratchet anti-slip structures, and the angle locking stability is enhanced through the tooth engagement.

5. A vehicle seat backrest apparatus with an angle-adjustable table board as defined in claim 1, wherein The first connecting rod and the second connecting rod are integrated with a damping bearing in the shaft position.

6. A vehicle seat backrest apparatus with an angle-adjustable table board as defined in claim 1, wherein The table plate comprises a bottom and a panel, and the panel is locked to the bottom.

7. A vehicle seat backrest apparatus with an angle-adjustable table board as defined in claim 1, wherein The center adjusting gear is installed in the table plate through a damping shaft.

8. A vehicle seat backrest apparatus with an angle-adjustable table board as defined in claim 1, characterized by The center adjusting gear is a floating ratchet type adjusting gear, which comprises a gear body, a wave-shaped elastic washer, a reverse pawl, and a compression spring. The adjusting gear is locked in one direction by the reverse pawl in the normal state, and can be disengaged and rotated in the opposite direction after being pressed downward.

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