Backrest turnover table plate mechanism and application

Abstract

The invention relates to a backrest overturning table plate mechanism and application. The backrest overturning table plate mechanism comprises a small table plate, a backrest framework, an angle adjuster, a synchronous rod and a limiting mechanism. The small table plate is fixed on the backrest framework, the backrest framework is connected with the co-driver seat backrest through the angle adjuster, the synchronizing rod penetrates through the center of the angle adjuster, the synchronizing rod is rotated, the adjuster is unlocked, and the angle between the backrest framework and the co-driver seat backrest is adjusted through the angle adjuster; the limiting mechanism comprises a coil spring, a limiting side upper plate and a limiting side lower plate, the limiting side upper plate and the limiting side lower plate can rotate relatively, the coil spring is fixed on the limiting side lower plate, and the limiting side lower plate is fixed on the seat backrest; the limiting side upper plate is fixed on the backrest framework; the requirements of customers are met, and the backrest overturning table plate is arranged at the co-driver position, so that the co-driver is provided with a multifunctional seat.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing, and specifically to a backrest flip-up table mechanism and its application. Background Technology

[0002] In the current technology, the functions of commercial vehicle seats are relatively simple, especially the front passenger seat, which mostly lacks multi-functionality.

[0003] Reference patent CN111942241A discloses a multifunctional integrated middle seat, in which the folding table is height-adjustable and mounted on the back of the folding seat, the bottom storage box can be rotated open and closed, and the seat is also equipped with a quick-release structure.

[0004] However, the table in this patent folds backward, making it suitable for rear-seat passengers but not for the front passenger seat, which requires it to be folded forward.

[0005] On the other hand, reference patent CN2820609Y discloses a foldable table seat in a light passenger vehicle, whose backrest can be flipped down to be level with the seat cushion and used as a desk, but it also does not mention the function of flipping the table forward in the front passenger position.

[0006] The table folding directions in the aforementioned existing technologies do not meet the requirement of the front passenger seat flipping forward, and there are no products with this function in the commercial vehicle market.

[0007] Therefore, the technical problem of this application is how to design a backrest flip table mechanism suitable for the passenger seat so as to flip it forward and lay it flat, so as to meet the multi-functional needs of customers in the passenger seat for working, eating or placing items. Summary of the Invention

[0008] The purpose of this invention is to provide a backrest flip-up table mechanism for automobiles, aiming to solve the problem of limited functionality in existing car seats. To address the problems of the prior art, this application proposes a commercial vehicle backrest flip-up table mechanism composed of an unlocking strap, an adjuster, a limiting mechanism, and a small table. The adjuster enables the backrest frame to fold, and the small table, fixed to the backrest frame, can rotate with the backrest frame, achieving a forward-flipping and flattening function, filling a market gap.

[0009] It should be noted that, in this document, relational 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 such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0010] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution:

[0011] A backrest flipping table mechanism includes a small table 4 and a backrest frame 5. The small table 4 is fixed on the backrest frame 5. It also includes an angle adjuster 2, a synchronizing rod 7, and a limiting mechanism 3.

[0012] The backrest frame 5 is connected to the seat back 6 via the angle adjuster 2. The synchronizing rod 7 passes through the center of the angle adjuster 2. Rotating the synchronizing rod 7 unlocks the adjuster 2, and the angle between the backrest frame 5 and the seat back 6 is adjusted via the angle adjuster 2.

[0013] The limiting mechanism 3 includes a coil spring 8, a limiting side upper plate 10, and a limiting side lower plate 11. The limiting side upper plate 10 and the limiting side lower plate 11 can rotate relative to each other. The coil spring 8 is fixed on the limiting side lower plate 11, and the limiting side lower plate 11 is fixed on the seat back 6. The limiting side upper plate 10 is fixed on the backrest frame 5.

[0014] Furthermore, the limiting mechanism 3 also includes a limiting pin 9, which is fixed on the upper plate 10 on the limiting side.

[0015] Furthermore, the upper plate 10 on the limiting side is provided with a limiting side upper plate retaining pin 12 and a limiting side upper plate arc hole 22;

[0016] The lower limit plate 11 is provided with a lower limit plate retaining pin 23 and a lower limit plate arc hole 21;

[0017] The upper plate retaining pin 12 on the limiting side engages with the arc hole 21 on the lower plate on the limiting side, allowing the upper plate retaining pin 12 to move within the arc hole 21 on the lower plate on the limiting side.

[0018] The lower plate retaining pin 23 on the limiting side engages with the arc hole 22 on the upper plate on the limiting side, allowing the lower plate retaining pin 23 to move within the arc hole 22 on the upper plate on the limiting side.

[0019] Furthermore, the lower limiting plate 11 is provided with two limiting points. When the coil spring end 15 abuts against the first limiting point 13 and the limiting pin 9 presses the coil spring end 15 into contact with the first limiting point 13, the small table is in an upright state, and the backrest frame 5 is in a straight line with the seat back 6, serving as a backrest for the passenger seat. When the limiting pin 9 contacts the second limiting point 14, the coil spring end 15 is separated from the first limiting point 13, the small table is in a flat state, and the backrest frame 5 is perpendicular to the seat back 6.

[0020] Furthermore, the aforementioned backrest flip table mechanism also includes an unlocking knob 17, an upper side plate 19 of the adjuster 2 fixed to the backrest frame 5, and a lower side plate 20 of the adjuster 2 fixed to the seat back 6; a synchronizing rod 7 passes through the unlocking knob 17 and the adjuster 2 in sequence, one end of the synchronizing rod is limited at the backrest frame 5 by a limiting card 18, the synchronizing rod 7 is connected to the adjuster 2 by a key, the synchronizing rod 7 is connected to the unlocking knob 17 by a key, the key on the synchronizing rod 7 is inserted into the key groove of the adjuster and the unlocking knob 17, when the unlocking knob 17 is rotated, it drives the synchronizing rod 7 to rotate, the synchronizing rod 7 drives the unlocking rod in the adjuster 2 to unlock the adjuster, so that the adjuster can adjust the rotation angle.

[0021] Furthermore, a protrusion is provided on the synchronizing rod 7 to restrict the movement of the unlocking knob 17 along the axial direction of the synchronizing rod; the end of the unlocking knob 17 abuts against one side of the angle adjuster 2, and the limiting card 18 restricts the other side of the angle adjuster.

[0022] Furthermore, the coil spring 8 is fixed to the lower plate 11 on the limiting side by the backrest connecting rivet 16.

[0023] Furthermore, the backrest flip table mechanism also includes an unlocking strap 1, one end of which is fitted onto the unlocking knob 17 to increase the rotational torque of the unlocking knob 17.

[0024] Furthermore, the backrest frame 5 is adapted to the shape of the human head and shoulders, and the shape of the small table 4 matches the shape of the backrest frame 5.

[0025] An application of a backrest flip-up table mechanism, which is used in automobiles.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. This invention meets the needs of customers by providing a flip-up table with a backrest in the passenger seat, making the passenger seat a multi-functional seat.

[0028] 2. This invention fills the gap in the current domestic market for commercial vehicles with backless folding table functions.

[0029] 3. This invention has fewer parts, a simple structure, is easy to assemble, has a low failure rate, is convenient to maintain, and can quickly solve customer problems. Attached Figure Description

[0030] The invention will now be further described with reference to the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of a backrest flip-up table mechanism according to the present invention;

[0032] Figure 2 This is a schematic diagram showing the connection relationship between the backrest frame, where a backrest flip-up table mechanism is located, and the seat back.

[0033] Figure 3a This is a schematic diagram of a backrest flip table mechanism in two states: vertical and horizontal.

[0034] Figure 3b A schematic diagram of the dynamic transition of a backrest flip-up tabletop mechanism from vertical to horizontal.

[0035] Figure 4 This is a schematic diagram showing the structural connections of the angle adjuster.

[0036] Figure 5 Schematic diagram of the components and positional connections of the limit mechanism Figure 1 ;

[0037] Figure 6 Schematic diagram of the components and positional connections of the limit mechanism Figure 2 ;

[0038] Figure 7 Schematic diagram 3 shows the composition and positional connection of the limiting mechanism;

[0039] Figure 8 A schematic diagram showing the connection relationship between the angle adjuster and the rotary knob.

[0040] Figure 9 This is a schematic diagram showing the connection relationship between the unlocking pull strap and the unlocking knob.

[0041] Figure 10 This is a schematic diagram showing the positional relationship between the synchronization lever and the unlocking knob;

[0042] In the picture:

[0043] 1. Unlock the pull strap;

[0044] 2. Angle adjuster;

[0045] 3. Limiting mechanism;

[0046] 4. Small table;

[0047] 5. Backrest frame;

[0048] 6. Seat backrest

[0049] 7. Synchronizing rod

[0050] 8. Coil spring;

[0051] 9. Limit pin;

[0052] 10. Limiting side upper plate;

[0053] 11. Limiting side lower plate;

[0054] 12. Limit side upper plate card connector;

[0055] 13. First limit;

[0056] 14. Second limit;

[0057] 15. Spring end;

[0058] 16. Backrest connecting rivets;

[0059] 17. Rotate the knob;

[0060] 18. Restricted cards;

[0061] 19. Upper side panel of the angle adjuster;

[0062] 20. Lower side panel of the angle adjuster;

[0063] 21. Arc-shaped hole on the lower limit plate;

[0064] 22. Arc-shaped hole on the upper plate of the limiting side;

[0065] 23. Limit side lower plate card connector pin. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below with reference to the accompanying drawings.

[0067] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0068] The present invention will now be described in detail with reference to the accompanying drawings:

[0069] This folding table with backrest mainly consists of an unlocking strap 1, an angle adjuster 2, a limiting mechanism 3, a small table 4, and a backrest frame 5. The backrest frame 5 is folded over by the angle adjuster 2, and the small table 4 is fixed on the backrest frame 5 and rotates with the backrest frame 5 to achieve the function of flipping forward and flattening.

[0070] like Figure 2 As shown, the unlocking pull strap 1 and the angle adjuster 2 are on the angle adjuster side; the limiting mechanism 3 is on the limiting side.

[0071] When the small table is laid flat, it can be used for various purposes such as working, eating, and placing items. When the small table is upright, the backrest frame 5 is aligned with the passenger seat backrest 6, serving as the passenger seat backrest.

[0072] The backrest frame 5 is adapted to the shape of the human head and shoulders, and the shape of the small table 4 matches the shape of the backrest frame 5.

[0073] like Figure 1 , Figure 2 As shown, a backrest flip table mechanism includes an unlocking strap 1, an angle adjuster 2, a limiting mechanism 3, a small table 4, and a backrest frame 5;

[0074] like Figure 2 As shown, the backrest frame 5 is connected to the seat back 6 via the angle adjuster 2. The synchronizing rod 7 passes through the center of the angle adjuster 2. By rotating the synchronizing rod 7, the adjuster 2 is unlocked, and the angle between the backrest frame 5 and the seat back 6 is adjusted via the angle adjuster 2.

[0075] The small table 4 is fixedly connected to the backrest frame 5 by bolts. When the angle of the backrest frame 5 relative to the seat back 6 changes, the angle between the small table 4 and the seat back 6 also changes accordingly.

[0076] like Figure 4 , Figure 8 , Figure 9 , Figure 10As shown, the angle adjuster 2 is a commercially available component. The upper side plate 19 of the angle adjuster 2 is fixed to the backrest frame 5, and the lower side plate 20 of the angle adjuster 2 is fixed to the seat back 6. The synchronizing rod 7 passes through the unlocking knob 17 and the angle adjuster 2 in sequence. One end of the synchronizing rod is limited at the backrest frame 5 by the limiting card 18. The synchronizing rod 7 is connected to the angle adjuster 2 by a key, and the synchronizing rod 7 is connected to the unlocking knob 17 by a key. The key on the synchronizing rod 7 is inserted into the keyway of the angle adjuster and the unlocking knob 17. When the unlocking knob 17 is rotated, it drives the synchronizing rod 7 to rotate. The synchronizing rod 7 drives the unlocking rod in the angle adjuster 2 to unlock the angle adjuster, so that the angle adjuster can adjust the rotation angle. The synchronizing rod 7 drives the unlocking rod in the angle adjuster 2 to unlock the angle adjuster, so that the angle adjuster can adjust the rotation angle. This is a prior art technology. The angle adjuster used is the Lever1000Recliner, a manual angle adjuster. Through optimized design, it features small size, light weight, and excellent performance, offering excellent cost performance.

[0077] A protrusion is provided on the synchronizing rod 7 to restrict the movement of the unlocking knob 17 along the axial direction of the synchronizing rod. The end of the unlocking knob 17 abuts against one side of the angle adjuster 2, and the limiting card 18 restricts the other side of the angle adjuster.

[0078] like Figure 5 , Figure 6 , Figure 7 As shown, the limiting mechanism 3 consists of a coil spring 8, a limiting pin 9, a limiting upper plate 10, and a limiting lower plate 11. The limiting upper plate 10 is provided with a limiting upper plate retaining pin 12 and a limiting upper plate arc hole 22. The limiting lower plate 11 is provided with a limiting lower plate retaining pin 23 and a limiting lower plate arc hole 21. The limiting upper plate retaining pin 12 cooperates with the limiting lower plate arc hole 21, allowing the limiting upper plate retaining pin 12 to move within the limiting lower plate arc hole 21. The limiting lower plate retaining pin 23 cooperates with the limiting upper plate arc hole 22, allowing the limiting lower plate retaining pin 23 to move within the limiting upper plate arc hole 22. Under the condition that the limiting upper plate 10 and the limiting lower plate 11 move relative to each other with the aforementioned retaining pin and arc hole cooperation, they can rotate relative to each other.

[0079] The coil spring 8 is fixed to the lower limiting plate 11 via the backrest connecting rivet 16, and the lower limiting plate 11 is fixed to the passenger seat backrest 6; the limiting pin 9 is fixed to the upper limiting plate 10, and the upper limiting plate 10 is fixed to the backrest frame 5; the lower limiting plate 11 is provided with two limiting points. When the coil spring end 15 is against the first limiting point 13 and the limiting pin 9 presses against the coil spring end 15 and contacts the first limiting point 13, the small table is in an upright state, and the backrest frame 5 and the seat backrest 6 are in a straight line, serving as the passenger seat backrest; when the limiting pin 9 contacts the second limiting point 14, the coil spring end 15 is separated from the first limiting point 13, the small table is in a flat state, and the backrest frame 5 is perpendicular to the seat backrest 6.

[0080] like Figure 3a , Figure 3b , Figure 10 As shown, when the unlocking strap 1 is pulled, it causes the unlocking knob 17 to rotate, unlocking the angle adjuster 2 and adjusting the angle of the backrest frame 5. Due to the limitation of the two limit positions, the angle of the backrest frame 5 relative to the horizontal direction can be adjusted between 0 and 90 degrees. Under the action of the spring force, the spring end 15 springs the limit pin 9, and the limit pin 9 drives the backrest frame 5 to move. When the limit pin 9 contacts the second limit 14, the spring end 15 is separated from the first limit 13, the small table is in a flat state, and the backrest frame 5 is perpendicular to the seat back 6. At this time, the unlocking strap 1 is pulled continuously, and the angle adjuster 2 is always in the unlocked state. If you use manual force to lift the backrest frame 5, from the state where the backrest frame 5 is perpendicular to the seat back 6 to the state where the backrest frame 5 and the seat back 6 are in a straight line, you also need to pull the unlocking strap 1 continuously, and the angle adjuster 2 will always be in the unlocked state. If the unlocking strap 1 is released, the angle adjuster 2 will be locked, and the backrest frame 5 and seat back 6 will form a certain angle. Due to the two limiting points, this angle is between 0 and 90 degrees. Depending on the required angle, the unlocking strap can be pulled to control the angle adjuster to be in the unlocked or locked state. When in the unlocked state, the angle can be adjusted; when in the locked state, the angle cannot be adjusted, and the backrest frame 5 and seat back 6 will be in a fixed, stationary state at a certain angle.

[0081] like Figure 3a , Figure 3b , Figure 4 , Figure 9 , Figure 10 As shown, one end of the unlocking pull strap 1 is fitted onto the unlocking knob 17, increasing the rotational torque of the unlocking knob 17, making it easier for the unlocking knob 17 to rotate and drive the synchronizing rod 7 to rotate.

[0082] This invention provides an application of a backrest flip-up table mechanism in automobiles. When the small table is laid flat, it can be used for various purposes such as working, eating, and placing items. When the small table is upright, the backrest frame is aligned with the seat back, serving as a backrest for the front passenger.

[0083] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be included within the scope of protection of the present invention. Furthermore, all content not described in detail in this specification is prior art known to those skilled in the art.

Claims

1. A backrest flip-up table mechanism, comprising a small table and a backrest frame, wherein the small table is fixed to the backrest frame, characterized in that: It also includes an angle adjuster, a synchronizing rod, and a limit mechanism; The backrest frame is connected to the seat back via an angle adjuster. A synchronizing rod passes through the center of the angle adjuster. Rotating the synchronizing rod unlocks the adjuster, allowing the angle between the backrest frame and the secondary reinforced seat back to be adjusted. The limiting mechanism includes a coil spring, a limiting upper plate, and a limiting lower plate. The limiting upper plate and the limiting lower plate can rotate relative to each other. The coil spring is fixed to the limiting lower plate, and the limiting lower plate is fixed to the seat back. The limiting upper plate is fixed to the backrest frame.

2. The backrest flip-up table mechanism according to claim 1, characterized in that: The limiting mechanism also includes a limiting pin, which is fixed to the upper plate on the limiting side.

3. The backrest flip-up table mechanism according to claim 1, characterized in that: The upper plate on the limiting side is equipped with a limiting side upper plate retaining pin and a circular arc hole on the limiting side upper plate; The lower limit plate is equipped with a lower limit plate retaining pin and a lower limit plate arc hole; The upper plate of the limiting side has a locking pin that engages with the arc hole of the lower plate of the limiting side, allowing the upper plate of the limiting side to move within the arc hole of the lower plate of the limiting side. The lower limit plate locking pin engages with the arc hole on the upper limit plate, allowing the lower limit plate locking pin to move within the arc hole on the upper limit plate.

4. The backrest flip-up table mechanism according to claim 2, characterized in that: The lower limit plate is provided with two limit positions. The end of the coil spring is attached to the first limit position. When the limit pin presses the end of the coil spring into contact with the first limit position, the small table is in an upright state and the backrest frame is in a straight line with the seat back. When the limit pin contacts the second limit position, the end of the coil spring is separated from the first limit position, the small table is in a flat state, and the backrest frame is perpendicular to the seat back.

5. The backrest flip-up table mechanism according to claim 1, characterized in that: It also includes an unlocking knob, an upper side plate of the adjuster fixed to the backrest frame, and a lower side plate of the adjuster fixed to the seat back. A synchronizing rod passes through the unlocking knob and the adjuster in sequence. One end of the synchronizing rod is limited to the backrest frame by a limiting card. The synchronizing rod is connected to the adjuster by a key, and the synchronizing rod is connected to the unlocking knob by a key. The key on the synchronizing rod is inserted into the keyway of the adjuster and the unlocking knob. When the unlocking knob is turned, it drives the synchronizing rod to rotate. The synchronizing rod drives the unlocking rod in the adjuster to unlock the adjuster, so that the adjuster can adjust the rotation angle.

6. The backrest flip-up table mechanism according to claim 5, characterized in that: The synchronizing rod is provided with a protrusion to restrict the movement of the unlocking knob along the axial direction of the synchronizing rod; the end of the unlocking knob abuts against one side of the angle adjuster, and the limiting card restricts the other side of the angle adjuster.

7. The backrest flip-up table mechanism according to claim 2, characterized in that: The coil spring is fixed to the lower plate of the limiting side by a backrest connecting rivet.

8. The backrest flip-up table mechanism according to claim 5, characterized in that: It also includes an unlocking pull strap, one end of which is fitted onto the unlocking knob to increase the rotational torque of the unlocking knob.

9. The backrest flip-up table mechanism according to claim 1, characterized in that: The backrest frame is adapted to the shape of the human head and shoulders, and the shape of the small table matches the shape of the backrest frame.

10. An application of a backrest flip-up table mechanism, characterized in that: The backrest flip table mechanism according to any one of claims 1 to 9 is applied to an automobile.

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