Automobile seat back small table board capable of being folded and stored

Abstract

The utility model discloses an automobile seat back small table board capable of being folded and stored, and belongs to the technical field of automobile seats. The back plate is composed of the back plate body, the connecting rod assembly and the table plate body, the connecting rod assembly is provided with the upper connecting rod and the lower connecting rod, so that the displacement track of the table plate body is stable, and meanwhile the upper torsion spring is arranged between the upper connecting rod and the back plate connecting rod base, and the lower torsion spring is arranged between the lower connecting rod and the back plate connecting rod base. When a user unfolds or folds the table board body according to the track, only force for changing the posture of the table board body needs to be applied, force for lifting the table board body does not need to be applied, meanwhile, even if the user temporarily releases the force, the table board body is kept in the posture, and when no external force exists, the table board body and the back board body are in a balanced state; and collision damage is avoided. As a whole, the small table board on the back of the automobile seat has the advantages of being smooth in displacement, labor-saving in operation, safe in use and the like.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and in particular to a foldable and retractable small table on the back of an automotive seat. Background Technology

[0002] Car seatback tray tables are a very practical in-car accessory. Installed behind the front seats, they not only provide passengers with extra work or dining space, but can also be used to place items such as food, mobile phones, and laptops. These tray tables are usually pre-installed at the factory or added as an aftermarket installation on the back of the front seats.

[0003] The most basic function of the tray table is that when not in use, it is folded down to a position parallel to the back of the car seat via a linkage assembly, and when in use, it is unfolded to a horizontal position facing the rear passengers via the linkage assembly.

[0004] Chinese patent CN204077437U discloses a concealed snap-on folding tabletop device for a chair back, showing that the tabletop is connected to the seat back panel via two sets of linkage assemblies. Each set of linkage assemblies includes a first linkage and a second linkage. This double-link system enables folding and unfolding. However, with the increased functionality and improved materials used in the small tabletop, it inevitably becomes quite heavy. Furthermore, the multiple linkages result in numerous hinges. If the hinges are too loose, the tabletop can easily unfold on its own, generating noise; if the hinges are too tight, the user will find folding and unfolding difficult and strenuous.

[0005] This shows that the folding and unfolding of existing car seat back tray tables is not smooth, effortless, or safe. Utility Model Content

[0006] To address the problems existing in the prior art, the main objective of this utility model is to provide a foldable and retractable car seat back tray, which allows users to easily fold and unfold the tray in a labor-saving manner. The tray moves smoothly during the operation, preventing loss of control and ensuring safety.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A foldable and retractable car seat backrest table includes a backrest body, a connecting rod assembly, and a table body. The backrest body has an accommodating groove on its outer side. The table body is connected to the backrest body via the connecting rod assembly, which includes an upper connecting rod and a lower connecting rod. The backrest body has a backrest connecting rod base, and the table body has a table body connecting rod base. One end of the upper connecting rod is hinged to the upper side of the backrest connecting rod base, and the other end of the upper connecting rod is hinged to the rear side of the table body connecting rod base. One end of the lower connecting rod is hinged to the backrest body. The lower side of the plate connecting rod base has the other end of the lower connecting rod connected to the front side of the tabletop connecting rod base. The upper connecting rod and the lower connecting rod are located on the same swing plane. The upper connecting rod and the lower connecting rod cooperate to allow the tabletop body to be displaced and retracted into the receiving groove or to be displaced and unfolded outside the receiving groove. It also includes an upper torsion spring and a lower torsion spring. One end of the upper torsion spring is fixed to the back plate connecting rod base, and the other end of the upper torsion spring is fixed to the upper connecting rod. One end of the lower torsion spring is fixed to the back plate connecting rod base, and the other end of the lower torsion spring is fixed to the lower connecting rod.

[0008] Preferably, the lower torsion spring is disposed at the hinge joint between the lower connecting rod and the back plate connecting rod base at a preset torsion angle, and the upper torsion spring is sleeved at the hinge joint between the upper connecting rod and the back plate connecting rod base at a preset torsion angle.

[0009] Preferably, the back panel body is provided with a locking buckle and a locking groove of the table panel body. The locking buckle cooperates with the locking groove so that when the table panel body is displaced and retracted into the receiving groove, the table panel body is fixed in the receiving groove.

[0010] Preferably, the preset torsion angle of the lower torsion spring is greater than the preset torsion angle of the upper torsion spring.

[0011] Preferably, one of the lower connecting rod and the upper connecting rod is fixedly provided with a pad so that when the table body is displaced and unfolded to its limit position, the pad abuts against the lower connecting rod and the upper connecting rod respectively.

[0012] Preferably, the back plate connecting rod base is provided with an opening that allows the upper and lower connecting rods to pass through. The opening of the back plate connecting rod base is provided with a pair of shaft holes on the upper and lower parts respectively. Each pair of shaft holes is fixed with a rotating shaft. The upper and lower connecting rods are rotatably connected to the rotating shafts on the upper and lower parts of the back plate connecting rod base through bushings. A torsion spring hole is provided on the upper and lower parts of one side of the opening. The ends of the upper and lower torsion springs are fixed to the torsion spring holes respectively.

[0013] Preferably, the tabletop connecting rod base is provided with a groove that allows the upper connecting rod and the lower connecting rod to be inserted. The groove of the tabletop connecting rod base has a pair of shaft holes on both sides at the front and rear. Each pair of shaft holes is fixed with a rotating shaft. The upper connecting rod and the lower connecting rod are rotatably connected to the rotating shafts at the front and rear of the tabletop connecting rod base through bushings.

[0014] Preferably, the upper connecting rod and the lower connecting rod are each provided with a torsion spring groove at one end near the connecting rod base of the back plate, the upper torsion spring is disposed in the torsion spring groove of the upper connecting rod, and the lower torsion spring is disposed in the torsion spring groove of the lower connecting rod.

[0015] Preferably, the linkage assembly is provided in two sets, and the two sets of linkage assemblies are symmetrically arranged on both sides of the table body.

[0016] Preferably, the receiving groove is provided with two first grooves; the first groove is provided with a second groove, and the back plate connecting rod base is fixed in the second groove; the back plate body is provided with a cover plate, and the cover plate matches and covers the first groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: The small table on the back of the car seat of this utility model, by configuring the linkage assembly into an upper linkage and a lower linkage, realizes the switching between the table body being displaced and retracted into the receiving groove or displaced and unfolded outside the receiving groove, and the displacement trajectory of the table body is stable; at the same time, by setting an upper torsion spring between the upper linkage and the back panel linkage base, and setting a lower torsion spring between the lower linkage and the back panel linkage base, the upper torsion spring provides elastic torque to the upper linkage, and the lower torsion spring provides elastic torque to the lower linkage, so that the weight of the table body is balanced. Thus, when the user unfolds or retracts the table body according to the trajectory, only the force to change the posture of the table body needs to be applied, without the need to apply the force to lift the table body. At the same time, even if the user temporarily releases the force, the table body maintains its posture, improving the operating space. When there is no external force, the table body and the back panel body are in a balanced state, avoiding collision damage, thereby meeting the needs of automotive safety. Overall, the small table on the back of the car seat has the characteristics of smooth movement, effortless operation, and safe use.

[0018] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 A three-dimensional structural diagram of a foldable and retractable car seat back table according to an embodiment of the present invention.

[0020] Figure 2 A partial three-dimensional structural diagram of a foldable and retractable car seat back table according to an embodiment of the present invention.

[0021] Figure 3A cross-sectional structural diagram of a foldable and retractable car seat backrest table in its first state according to an embodiment of the present invention.

[0022] Figure 4 A cross-sectional structural diagram of a second state of a foldable and retractable car seat back table according to an embodiment of the present invention.

[0023] Figure 5 A cross-sectional structural diagram of a foldable and retractable car seat backrest table in its third state according to an embodiment of the present invention.

[0024] Figure 6 A schematic diagram of the dispersed three-dimensional structure of the components of a foldable and retractable car seat backrest table according to an embodiment of the present invention.

[0025] Reference numerals: 10. Backplate body; 11. Receiving groove; 12. Backplate connecting rod base; 13. Locking buckle; 14. First groove; 15. Second groove; 16. Cover plate; 20. Connecting rod assembly; 21. Upper connecting rod; 22. Lower connecting rod; 23. Upper torsion spring; 24. Lower torsion spring; 25. Pad; 30. Tabletop body; 31. Tabletop connecting rod base; 32. Locking groove. Detailed Implementation

[0026] To better illustrate the purpose, technical solution, and advantages of this utility model, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] like Figures 1 to 6 The image shows a foldable and retractable car seat backrest table according to an embodiment of the present invention. The car seat backrest table includes a backrest body 10, a connecting rod assembly 20, and a table body 30. A mounting base plate is used to fix it to the car seat back and provides space for the fixed installation of the backrest body 10 and the table body 30. The backrest body 10 can be configured to the shape of a car seat backrest, making the car seat more aesthetically pleasing, while also allowing the table body 30 to be stored. The table body 30 provides a place for the user to place items and is connected to the backrest body 10 via the connecting rod assembly 20. To make the table body 30 more robust and stable, the connecting rod assembly 20 is typically configured in two sets, with each set of the connecting rod assembly 20 having two connecting rods.

[0028] In detail, the linkage assembly 20 includes an upper linkage 21 and a lower linkage 22. The back panel body 10 is provided with a back panel linkage base 12, and the tabletop body 30 is provided with a tabletop linkage base 31. One end of the upper linkage 21 is hinged to the upper side of the back panel linkage base 12, and the other end of the upper linkage 21 is hinged to the rear side of the tabletop linkage base 31. One end of the lower linkage 22 is hinged to the lower side of the back panel linkage base 12, and the other end of the lower linkage 22 intersects with the front side of the tabletop linkage base 31. The upper linkage 21 and the lower linkage 22 are located in the same swing plane. The upper link 21 and the lower link 22 cooperate with each other. When the upper link 21 and the lower link 22 swing to the lower limit position, the table body 30 is displaced and retracted into the receiving groove 11. When the upper link 21 and the lower link 22 swing to the upper limit position, the upper link 21 and the lower link 22 abut against each other, and at the same time, the table body 30 is displaced and unfolded outside the receiving groove 11, and remains in a horizontal state facing the passenger.

[0029] To further achieve the purpose of this utility model, an upper torsion spring 23 is provided between the upper connecting rod 21 and the back plate connecting rod base 12, and a lower torsion spring 24 is provided between the lower connecting rod 22 and the back plate connecting rod base 12. One end of the upper torsion spring 23 is fixed to the back plate connecting rod base 12, and the other end of the upper torsion spring 23 is fixed to the upper connecting rod 21. One end of the lower torsion spring 24 is fixed to the back plate connecting rod base 12, and the other end of the lower torsion spring 24 is fixed to the lower connecting rod 22. For ease of understanding, the unfolding process of the small table on the back of the car seat in this embodiment is described by referring to... Figures 3 to 5 The upper torsion spring 23 applies a counterclockwise torque to the upper connecting rod 21, and the lower torsion spring 24 also applies a counterclockwise torque to the lower connecting rod 22. This causes the upper connecting rod 21 and the lower connecting rod 22 to rotate a certain angle relative to their lower limit position when there is no external force, thus counteracting the weight of the tabletop body 30. When the user applies a slight force to the tabletop body 30 to make it swing, the tabletop body 30 will be lifted upwards and swing horizontally, quickly unfolding into a horizontal state. When the user releases force at any time while swinging the tabletop body 30, due to factors such as friction at the hinge, the tabletop body 30 can maintain its posture to a certain extent and will not quickly slip to the lowest point, thereby improving the user experience of the folding tabletop. Similarly, when the user pushes the tabletop body 30 slightly, the tabletop body 30 can be adjusted from a horizontal state to a state approximately parallel to the back panel body 10. A slight press will allow the tabletop body 30 to be stored in the groove of the back panel body 10.

[0030] Therefore, this utility model allows users to easily fold and unfold the small table in a labor-saving manner. The small table moves smoothly during the operation, avoiding loss of control and ensuring safety.

[0031] To improve the folding experience, refer to Figures 2 to 5Specifically, in this embodiment, the lower torsion spring 24 is positioned at a preset torsion angle at the hinge between the lower connecting rod 22 and the back plate connecting rod base 12, and the upper torsion spring 23 is sleeved at a preset torsion angle at the hinge between the upper connecting rod 21 and the back plate connecting rod base 12. Thus, at any position of the upper connecting rod 21 and the lower connecting rod 22, both the lower torsion spring 24 and the upper torsion spring 23 can apply auxiliary torque. To improve the folding experience, refer to... Figures 3 to 5 Specifically, in this embodiment, the back panel body 10 is provided with a locking buckle 13 and a locking groove 32 for the table panel body 30. The locking buckle 13 cooperates with the locking groove 32 so that when the table panel body 30 is displaced and retracted into the receiving groove 11, the table panel body 30 is fixed in the receiving groove 11. The locking buckle 13 can fix the table panel body 30 into the receiving groove 11. Since both the lower torsion spring 24 and the upper torsion spring 23 are provided with preset torsion angles, when the locking buckle 13 releases the table panel body 30, the table panel body 30 will automatically pop out and maintain a parallel posture with the back panel body 10.

[0032] To improve the folding experience, refer to Figures 3 to 5 Specifically, in this embodiment, the preset torsion angle of the lower torsion spring 24 is greater than the preset torsion angle of the upper torsion spring 23. The rotation angle of the lower torsion spring 24 during unfolding is greater than that of the upper torsion spring 23. The larger preset torsion angle of the lower torsion spring 24 provides greater torque, thus providing auxiliary torque throughout the unfolding process of the entire tabletop body 30. Simultaneously, the cooperation between the lower torsion spring 24 and the upper torsion spring 23 ensures that the tabletop body 30 remains parallel to the back panel body 10 when released.

[0033] To improve the folding experience, refer to Figures 3 to 5 In this embodiment, a pad 25 is fixedly provided on the upper side of the lower connecting rod 22 near the table body 30, so that when the table body 30 is displaced and unfolded to its limit position, the lower connecting rod 22 will abut against the upper connecting rod 21 with its pad 25. The pad 25 can prevent the upper connecting rod 21 from colliding with the lower connecting rod 22, and at the same time achieve the desired effect.

[0034] Specifically, in this embodiment, refer to Figure 2 The back panel connecting rod base 12 has an opening that allows the upper connecting rod 21 and the lower connecting rod 22 to pass through, thereby bringing the tabletop body 30 and the back panel body 10 closer together. On both sides of the opening of the back panel connecting rod base 12, there are pairs of shaft holes at the top and bottom. Each pair of shaft holes is fixed with a rotating shaft. The upper connecting rod 21 and the lower connecting rod 22 are rotatably connected to the rotating shafts at the top and bottom of the back panel connecting rod base 12 via bushings, thus making the support of the upper connecting rod 21 and the lower connecting rod 22 more stable and the rotation relative to the back panel body 10 smoother. On one side of the opening, there is a torsion spring hole at the top and bottom. The ends of the upper torsion spring 23 and the lower torsion spring 24 are fixed to the torsion spring holes, making the installation of the upper torsion spring 23 and the lower torsion spring 24 more convenient.

[0035] Specifically, in this embodiment, refer to Figure 2 The tabletop connecting rod base 31 is provided with a groove that allows the upper connecting rod 21 and the lower connecting rod 22 to be inserted. The groove of the tabletop connecting rod base 31 has a pair of shaft holes on the front and rear sides respectively. Each pair of shaft holes is fixed with a rotating shaft. The upper connecting rod 21 and the lower connecting rod 22 are rotatably connected to the rotating shafts at the front and rear parts of the tabletop connecting rod base 31 through bushings, thereby making the support of the upper connecting rod 21 and the lower connecting rod 22 more stable and the rotation relative to the tabletop body 30 smoother.

[0036] Specifically, in this embodiment, the upper connecting rod 21 and the lower connecting rod 22 are each provided with a torsion spring groove at one end near the back plate connecting rod base 12. The upper torsion spring 23 is disposed in the torsion spring groove of the upper connecting rod 21, thereby accommodating an upper torsion spring 23 with more coils. The lower torsion spring 24 is disposed in the torsion spring groove of the lower connecting rod 22, thereby accommodating an upper torsion spring 23 with more coils.

[0037] The above embodiments mainly describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A foldable and retractable car seat backrest table, comprising a backrest body (10), a linkage assembly (20), and a table body (30), characterized in that, The back panel body (10) has a receiving groove (11) on its outer side. The tabletop body (30) is connected to the back panel body (10) via a connecting rod assembly (20). The connecting rod assembly (20) includes an upper connecting rod (21) and a lower connecting rod (22). The back panel body (10) is provided with a back panel connecting rod base (12), and the tabletop body (30) is provided with a tabletop connecting rod base (31). One end of the upper connecting rod (21) is hinged to the upper side of the back plate connecting rod base (12), and the other end of the upper connecting rod (21) is hinged to the rear side of the tabletop connecting rod base (31). One end of the lower connecting rod (22) is hinged to the lower side of the back plate connecting rod base (12), and the other end of the lower connecting rod (22) is connected to the front side of the tabletop connecting rod base (31). The upper connecting rod (21) and the lower connecting rod (22) are located on the same swing plane. The upper connecting rod (21) and the lower connecting rod (22) cooperate to allow the tabletop body (30) to be displaced and retracted into the receiving groove (11) or to be displaced and unfolded outside the receiving groove (11). It also includes an upper torsion spring (23) and a lower torsion spring (24). One end of the upper torsion spring (23) is fixed to the back plate connecting rod base (12), and the other end of the upper torsion spring (23) is fixed to the upper connecting rod (21). One end of the lower torsion spring (24) is fixed to the back plate connecting rod base (12), and the other end of the lower torsion spring (24) is fixed to the lower connecting rod (22).

2. The foldable and retractable car seat backrest table according to claim 1, characterized in that, The lower torsion spring (24) is set at the hinge of the lower connecting rod (22) and the back plate connecting rod base (12) with a preset torsion angle, and the upper torsion spring (23) is sleeved at the hinge of the upper connecting rod (21) and the back plate connecting rod base (12) with a preset torsion angle.

3. A foldable and retractable car seat backrest table according to claim 2, characterized in that, The back panel body (10) is provided with a locking buckle (13) and a locking groove (32) of the table body (30). The locking buckle (13) and the locking groove (32) cooperate to fix the table body (30) in the receiving groove (11) when the table body (30) is displaced and retracted into the receiving groove (11).

4. A foldable and retractable car seat backrest table according to claim 2, characterized in that, The preset torsion angle of the lower torsion spring (24) is greater than the preset torsion angle of the upper torsion spring (23).

5. A foldable and retractable car seat backrest table according to claim 1, characterized in that, One of the lower connecting rod (22) and the upper connecting rod (21) is fixedly provided with a pad (25) so that when the table body (30) is displaced and unfolded to the limit position, the pad (25) abuts against the lower connecting rod (22) and the upper connecting rod (21) respectively.

6. A foldable and retractable car seat backrest table according to claim 1, characterized in that, The back plate connecting rod base (12) is provided with an opening that allows the upper connecting rod (21) and the lower connecting rod (22) to pass through. The back plate connecting rod base (12) has a pair of shaft holes on both sides of the opening, and a rotating shaft is fixed in each pair of shaft holes. The upper connecting rod (21) and the lower connecting rod (22) are rotatably connected to the rotating shafts of the upper and lower parts of the back plate connecting rod base (12) through bushings. A torsion spring hole is provided on one side of the opening, and the ends of the upper torsion spring (23) and the lower torsion spring (24) are fixed in the torsion spring holes respectively.

7. A foldable and retractable car seat back table according to claim 6, characterized in that, The tabletop connecting rod base (31) is provided with a groove that allows the upper connecting rod (21) and the lower connecting rod (22) to be inserted. The groove of the tabletop connecting rod base (31) is provided with a pair of shaft holes on the front and rear sides respectively. Each pair of shaft holes is fixed with a rotating shaft. The upper connecting rod (21) and the lower connecting rod (22) are rotatably connected to the rotating shafts at the front and rear parts of the tabletop connecting rod base (31) through bushings.

8. A foldable and retractable car seat backrest table according to claim 1, characterized in that, The upper connecting rod (21) and the lower connecting rod (22) are respectively provided with torsion spring grooves at one end near the back plate connecting rod base (12). The upper torsion spring (23) is provided in the torsion spring groove of the upper connecting rod (21), and the lower torsion spring (24) is provided in the torsion spring groove of the lower connecting rod (22).

9. A foldable and retractable car seat back table according to claim 1, characterized in that, The linkage assembly (20) is provided in two sets, and the two sets of linkage assemblies (20) are respectively symmetrically arranged on both sides of the table body (30).

10. A foldable and retractable car seat backrest table according to claim 9, characterized in that, The receiving groove (11) is provided with two first grooves (14); the first groove (14) is provided with a second groove (15), and the back plate connecting rod base (12) is fixed in the second groove (15); the back plate body (10) is provided with a cover plate (16), and the cover plate (16) matches and covers the first groove (14).

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