Anti-collision seat back small table plate

Abstract

The application discloses a kind of anti-collision seat back small table board, it is related to seat back table board technical field, including mounting frame, upper table board, lower table board, two upper movable support rods, two lower movable support rods, two connecting pieces, second connecting rod and reset spring, the both ends of second connecting rod are connected with safety hook by reset spring, the lower surface of lower table board is symmetrically provided with sliding slot, and the bottom of one end of upper table board is provided with sliding plate and impact block slidably connected with sliding slot, the table board of the present design is hit to the table board that is being opened by the inertia of rear seat passenger, and transverse collision force is generated to the table board, the transverse force will drive impact block to hit safety hook, so that the hook of lower movable support rod is separated from the hook of safety hook, so that connecting piece and lower movable support rod become one fixed point from two fixed points, and connecting piece will rotate with lower movable support rod, and panel is automatically stored in the direction of mounting frame, so as to ensure the safety of the body of the person who is collided.

Description

Technical Field

[0001] This invention relates to the field of seat back table technology, specifically a collision-resistant seat back table. Background Technology

[0002] Seat backrest tables are adjustable flat panels installed on the back of chairs. They can be used as tabletops for placing items and can be folded down or unfolded. They are commonly found on the backs of seats in cars, trains, high-speed trains, and airplanes. Currently, all seat backrest tables on the market (mostly in commercial vehicles) are manually unfolded or folded. Manually unfolding seat backrest tables poses certain safety hazards.

[0003] For example, if rear passengers are not wearing seat belts and there is an emergency stop in the front, the rear passengers will hit the extended table in front due to inertia, which may lead to rib fractures in severe cases. To address this, the present invention provides a collision-resistant seat back table. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a collision-resistant seat backrest table, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a collision-resistant seat back table, including a mounting frame, and further comprising:

[0006] A disconnectable four-bar linkage is installed at the four corners of the mounting bracket and rotatably connected to it via pins;

[0007] The tabletop assembly is connected to the disconnectable four-bar linkage assembly, and the tabletop assembly has an external panel connection;

[0008] The mechanical locking hook assembly is located between the disconnectable four-bar assembly and the table assembly, and is used to lock and limit the movement.

[0009] The table assembly includes an upper table and a lower table. The upper table is slidably connected to the lower table. The lower table has symmetrical grooves on both sides of its lower surface. A sliding plate that is slidably connected to the groove is installed at one bottom end of the upper table. An impact block is vertically connected to the outer edge of the sliding plate outside the lower table.

[0010] As a further technical solution of the present invention, the disconnectable four-bar assembly includes two upper movable support rods and two lower movable support rods symmetrically arranged on both sides of the upper end and the lower end of the mounting frame. The other ends of the two upper movable support rods are rotatably connected to the outer walls of both sides of the lower table plate through pins, and the lower ends of the two upper movable support rods are each equipped with a locking block.

[0011] As a further technical solution of the present invention, the disconnectable four-bar assembly also includes a fixed plate that is connected between the two lower movable support rods, and the other end of the two lower movable support rods is connected to a connector. The lower movable support rods and the connectors are connected by a pin, and the other end of the two connectors are rotatably connected to both sides of the lower table plate by a pin.

[0012] As a further technical solution of the present invention, the other ends of the two connecting members are connected together by a first connecting rod that penetrates the lower table. Both ends of the first connecting rod are equipped with limiting teeth blocks corresponding to the locking blocks on the outside of the connecting members. The limiting teeth blocks are fan-shaped and have tooth grooves on their surfaces. The locking blocks are adapted to the tooth grooves on the surfaces of the limiting teeth blocks.

[0013] As a further technical solution of the present invention, the mechanical locking hook assembly includes a second connecting rod that is connected between the two connecting members. Both ends of the second connecting rod are connected to a return spring. Both ends of the second connecting rod pass through the connecting member and are connected to a safety hook through the return spring. One end of the lower movable support rod is provided with a protruding hook corresponding to the safety hook. One end of the safety hook is adapted to the protruding hook at one end of the lower movable support rod, and the other end of the safety hook corresponds to the impact block.

[0014] As a further technical solution of the present invention, the tabletop assembly also includes two limiting slide rods symmetrically installed at both ends of the inner side of the lower tabletop and two sets of sliding seats fixedly installed on both sides of the bottom of the upper tabletop. Each set of sliding seats has two slide rods, and each set of sliding seats is slidably connected to a limiting slide rod.

[0015] As a further technical solution of the present invention, a bendable trigger spring is fixedly connected to the front end of the upper table board, the middle part of the trigger spring is fixed to the middle part of the front side of the lower table board, and the two ends of the trigger spring are fixed to the two ends of the front side of the upper table board.

[0016] As a further technical solution of the present invention, the upper surface of the panel is provided with a movable groove corresponding to the two upper movable support rods. The movable groove is adapted to the upper movable support rod and is used for storage and limiting when the upper movable support rod rotates. The panel is fixed to the upper surface of the upper table.

[0017] This invention provides a collision-resistant seat backrest table. Compared with the prior art, it has the following advantages:

[0018] 1. A collision-resistant seat back table, which is connected to the table assembly by a disconnectable four-bar linkage and then assembled with a mounting frame. It is particularly suitable for seat back tables in cars, trains, bullet trains, airplanes and other vehicles where collisions may occur due to inertia. Moreover, the overall structure is simple. The table can be placed and carried without any problems when subjected to vertical force. However, when the table is subjected to lateral force, the table will automatically retract and will not cause harm to the human body.

[0019] 2. A collision-resistant seat back tray table. When the tray table is in the open position, in the event of a sudden situation or emergency braking, the rear passenger will be thrown against the open tray table due to inertia, generating a lateral impact force. This lateral force is transmitted to two upper movable support rods, two lower movable support rods, and two connecting parts. By designing a mechanical locking hook assembly between the tray table assembly and the disconnectable four-bar linkage assembly, when the tray table is subjected to lateral force, the upper tray table will drive the impact block to strike the safety hook, causing the protruding hook at one end of the lower movable support rod to disengage from the concave hook of the safety hook. This transforms the connecting parts and the lower movable support rod from two fixed points to one fixed point. Consequently, when the connecting parts continue to be pushed, they will rotate with the lower movable support rod, and the panel will automatically retract towards the mounting bracket, thus ensuring the safety of the person being hit. Moreover, the safety hook, under the action of a return spring, will reset during the panel retraction process and re-lock with the protruding hook at one end of the lower movable support rod, thus not affecting the use of the tray table when it is raised next time. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the panel unfolded in this invention;

[0021] Figure 2 This is a schematic diagram of the installation of the upper tabletop in this invention;

[0022] Figure 3 This is a bottom view of the lower tabletop and the upper tabletop in this invention;

[0023] Figure 4 This is a schematic diagram of the installation of the limiting tooth block in this invention;

[0024] Figure 5 This is a schematic diagram showing the engagement of the protruding hook and the safety hook of the lower movable support rod in this invention;

[0025] Figure 6 This is a schematic diagram showing the installation of the two fixing points of the lower movable support rod and the connecting rod in this invention;

[0026] Figure 7 This is a schematic diagram showing the engagement of the locking block and the limiting tooth block in this invention;

[0027] Figure 8 This is a schematic diagram illustrating the installation of the lower tabletop and the upper tabletop in this invention;

[0028] Figure 9 This is a schematic diagram of the panel being stored in this invention.

[0029] In the diagram: 1. Panel; 2. Mounting bracket; 21. Upper movable support rod; 22. Locking block; 23. Limiting tooth block; 24. First connecting rod;

[0030] 3. Upper tabletop; 31. Trigger spring; 32. Sliding seat; 33. Limiting slide bar; 34. Impact block; 35. Slide groove; 36. Slide plate;

[0031] 4. Lower movable support rod; 41. Fixing plate; 42. Connecting piece; 43. Second connecting rod; 44. Return spring; 5. Safety hook; 6. Lower table. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1-4 As shown, the present invention provides a technical solution for a collision-resistant seat backrest table: a collision-resistant seat backrest table includes a mounting frame 2, and further includes a disconnectable four-bar linkage assembly installed at the four corners of the mounting frame 2 and rotatably connected to it via pins. The disconnectable four-bar linkage assembly includes two upper movable support rods 21 and two lower movable support rods 4 symmetrically arranged on both sides of the upper and lower ends of the mounting frame 2, and also includes a fixing plate 41 connecting the two lower movable support rods 4 together. The other end of the two lower movable support rods 4 is connected to a connector 42, and the lower movable support rods 4 and the connector 42 are connected by pins. The two connecting pieces 42 are rotatably connected to the two sides of the lower tabletop 6 via pins at their other ends. The two upper movable support rods 21 are rotatably connected to the outer walls of the two sides of the lower tabletop 6 via pins at their other ends. The device can be fixed to the backrest of any seat, such as a car seat, train seat, high-speed train seat, or airplane seat, where collisions due to inertia may occur, using the mounting bracket 2. Furthermore, both the upper movable support rods 21 and the lower movable support rods 4 are hinged to the mounting bracket 2 via pins, allowing the upper movable support rods 21 and the lower movable support rods 4 to rotate relative to the mounting bracket 2 when the tabletop (i.e., panel 1) is extended or retracted. Figure 9 (as shown);

[0034] like Figure 1As shown, a tabletop assembly is connected to a disconnectable four-bar linkage assembly, and a panel 1 is connected to the outside of the tabletop assembly. The upper surface of the panel 1 has movable grooves corresponding to the two upper movable support rods 21. The movable grooves are adapted to the upper movable support rods 21 and are used for storage and limiting when the upper movable support rods 21 rotate. The panel 1 is fixed to the upper surface of the upper tabletop 3. It should be noted that the opening length of the movable grooves is sufficient to allow the upper movable support rods 21 to move from a horizontal state to a vertical state.

[0035] like Figure 3 , 5 As shown in Figure 8, the table assembly includes an upper table panel 3 and a lower table panel 6. The upper table panel 3 is slidably connected to the lower table panel 6. Sliding grooves 35 are symmetrically formed on both sides of the lower surface of the lower table panel 6. A sliding plate 36, slidably connected to the sliding groove 35, is installed at one end of the bottom of the upper table panel 3. An impact block 34 is vertically connected to the outer edge of the sliding plate 36 outside the lower table panel 6. The table assembly also includes two limiting sliding rods 33 symmetrically installed at both ends on the inner side of the lower table panel 6, and two sets of sliding seats 32 fixedly installed on both sides of the bottom of the upper table panel 3. Each set of sliding seats 32 has two members, and each set of sliding seats 32 is slidably connected to a limiting sliding rod 33. A bendable trigger spring 31 is fixedly connected to the front end of the upper table panel 3. The trigger spring 31 can also be a leaf spring. In the uncompressed state (i.e., normal state), the trigger spring 31 is bent, with both ends of the trigger spring 31 curving outwards (e.g., as shown in Figure 8). Figure 8 As shown), the middle part of the trigger spring 31 is fixed to the middle part of the front side of the lower table 6, and the two ends of the trigger spring 31 are fixed to the two ends of the front side of the upper table 3. When encountering a sudden situation or emergency braking, when the rear passenger hits the front table that is currently open due to inertia, that is, when it hits the panel 1, the panel 1 is subjected to an impact force (i.e., a pushing force), which drives the upper table 3 to move along the lower table 6 towards the mounting bracket 2 (this moving distance is the sliding distance of the slide plate 36 in the slide groove 35 when the trigger spring 31 changes from a bent state to a straight state, which is sufficient for the impact block 34 to push the safety hook 5 to rotate, causing the convex hook to disengage from the concave hook). At this time, the upper table 3 The movement will cause the impact block 34 to impact the safety hook 5, causing the protruding hook at one end of the lower movable support rod 4 to disengage from the concave hook of the safety hook 5. This will change the connection point 42 and the lower movable support rod 4 from two fixed points to one fixed point, allowing the connection point 42 and the lower movable support rod 4 to rotate, thus facilitating the retraction of the panel 1 towards the mounting bracket 2. It should be noted that the two fixed points mentioned above are specifically: the lower movable support rod 4 and the connection point 42 are connected by a pin, this is the first fixed point, denoted as A; when the protruding hook at one end of the lower movable support rod 4 engages with the concave hook of the safety hook 5, this is the second fixed point, denoted as B. Figure 6 As shown;

[0036] like Figure 2-7As shown, this design also includes a mechanical locking hook assembly located between the disconnectable four-bar linkage assembly and the tabletop assembly, used for locking and limiting. The mechanical locking hook assembly includes a second connecting rod 43 connected to two connecting parts 42. Both ends of the second connecting rod 43 are connected to return springs 44. Both ends of the second connecting rod 43 pass through the connecting parts 42 and are connected to safety hooks 5 via the return springs 44. One end of the lower movable support rod 4 is provided with a protrusion corresponding to the safety hook 5. One end of the safety hook 5 is adapted to the protrusion at one end of the lower movable support rod 4, and the other end of the safety hook 5 corresponds to the impact block 34. It should be noted that... The protruding hook at one end of the lower movable support rod 4 is perfectly matched with the concave hook of the safety hook 5. Under normal conditions, the protruding hook at one end of the lower movable support rod 4 is hooked in the concave hook of the safety hook 5. The safety hook 5 is connected to one end of the second connecting rod 43 through the return spring 44. Using the torque of the return spring 44, when the upper end of the safety hook 5 is pushed by the impact block 34, it will rotate at an angle, causing the protruding hook at one end of the lower movable support rod 4 to disengage from the concave hook of the safety hook 5. When the impact block 34 does not push the safety hook 5, the safety hook 5 will be reset by the return spring 44, so that the protruding hook at one end of the lower movable support rod 4 is hooked on the concave hook of the safety hook 5.

[0037] like Figure 4 and 7 As shown, the other ends of the two connectors 42 are connected by a first connecting rod 24 that passes through the lower tabletop 6. The lower ends of the two upper movable support rods 21 are each equipped with a locking block 22. The two ends of the first connecting rod 24 are located on the outside of the connectors 42 and are equipped with limiting teeth 23 corresponding to the locking blocks 22. The limiting teeth 23 are fan-shaped and have tooth grooves on their surfaces. The locking block 22 is adapted to the tooth grooves on the surface of the limiting teeth 23. The locking block 22 is set at the lower end of the upper movable support rod 21 so that when the panel 1 is pulled out to the maximum extent, the locking block 22 is just locked in the tooth groove of the limiting teeth 23 (i.e., the groove between two teeth), thereby limiting the panel 1. At this time, the panel 1 is just in a horizontal state.

[0038] The working principle of this invention is as follows: In use, this design uses the mounting bracket 2 and bolts to fix the entire tabletop to the back of the chair. When the passenger needs to use it, the panel 1 can be pulled to rotate one end of the upper movable support rod 21 and the lower movable support rod 4 around the mounting bracket 2. When the lower movable support rod 4 rotates from a vertical state to a horizontal state, the panel 1 is in a horizontal state. At this time, the locking block 22 at the lower end of the upper movable support rod 21 will engage with the tooth groove of the limiting tooth block 23 to achieve locking. Secondly, the protruding hook at one end of the lower movable support rod 4 engages with the concave hook of the safety hook 5, so that the lower movable support rod 4 and the connecting piece 42 form two fixed points (i.e., point A and point B), thereby completing the support of the panel 1.

[0039] When encountering a sudden situation or emergency braking, the rear passenger will be pushed by inertia into the front open panel 1. This will cause the panel 1 to be pushed and move the upper table 3 along the lower table 6 towards the mounting frame 2. At this time, the movement of the upper table 3 will cause the impact block 34 to impact the safety hook 5 through the sliding plate 36, causing the safety hook 5 to rotate. This will cause the protruding hook at one end of the lower movable support rod 4 to disengage from the concave hook of the safety hook 5, thereby changing the connection 42 and the lower movable support rod 4 from two fixed points to one fixed point. As a result, when the connection 42 continues to be pushed, it will rotate with the lower movable support rod 4, and the panel 1 will automatically retract towards the mounting frame 2, so that the panel 1 is retracted from the horizontal state to the vertical state.

[0040] Furthermore, the safety hook 5, under the action of the reset spring 44, will reset during the retraction of the panel 1 and re-engage with the protruding hook at one end of the lower movable support rod 4, thus not affecting the use of the tabletop when it is lifted next time.

[0041] 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.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A collision-resistant seat back table, comprising a mounting bracket (2), characterized in that, Also includes: A disconnectable four-bar linkage assembly is installed at the four corners of the mounting bracket (2) and rotatably connected to it via pins; The tabletop assembly is connected to the disconnectable four-bar assembly, and the tabletop assembly is externally connected to a panel (1). The mechanical locking hook assembly is located between the disconnectable four-bar assembly and the table assembly, and is used to lock and limit the movement. The table assembly includes an upper table (3) and a lower table (6). The upper table (3) is slidably connected to the lower table (6). The lower table (6) has symmetrical grooves (35) on both sides of its lower surface. A sliding plate (36) that is slidably connected to the groove (35) is installed at the bottom of one end of the upper table (3). An impact block (34) is vertically connected to the outer side of the sliding plate (36) outside the lower table (6). The disconnectable four-bar assembly includes two upper movable support rods (21) and two lower movable support rods (4) symmetrically arranged on both sides of the upper end and the lower end of the mounting bracket (2). The other ends of the two upper movable support rods (21) are rotatably connected to the outer walls of both sides of the lower table plate (6) through pins, and the lower ends of the two upper movable support rods (21) are each equipped with a locking block (22). The disconnectable four-bar assembly also includes a fixed plate (41) that is connected between the two lower movable support rods (4), and the other end of the two lower movable support rods (4) is connected to a connector (42). The lower movable support rods (4) and the connector (42) are connected by a pin, and the other end of the two connectors (42) are rotatably connected to both sides of the lower table (6) by a pin. The mechanical locking hook assembly includes a second connecting rod (43) that is connected between the two connecting parts (42). Both ends of the second connecting rod (43) are connected to a return spring (44). Both ends of the second connecting rod (43) pass through the connecting parts (42) and are connected to a safety hook (5) through the return spring (44). One end of the lower movable support rod (4) is provided with a protrusion at the safety hook (5). One end of the safety hook (5) is adapted to the protrusion at one end of the lower movable support rod (4), and the other end of the safety hook (5) corresponds to the impact block (34).

2. The anti-collision seat back table according to claim 1, characterized in that, The other ends of the two connectors (42) are connected by a first connecting rod (24) that passes through the lower table (6). Both ends of the first connecting rod (24) are equipped with limiting teeth (23) corresponding to the locking block (22) on the outside of the connector (42). The limiting teeth (23) are fan-shaped and have tooth grooves on their surface. The locking block (22) is adapted to the tooth grooves on the surface of the limiting teeth (23).

3. The anti-collision seat back table according to claim 1, characterized in that, The tabletop assembly also includes two limiting slide rods (33) symmetrically installed at both ends of the inner side of the lower tabletop (6) and two sets of sliding seats (32) fixedly installed on both sides of the bottom of the upper tabletop (3). Each set of sliding seats (32) has two of them, and each set of sliding seats (32) is slidably connected to a limiting slide rod (33).

4. The anti-collision seat back table according to claim 1, characterized in that, A bendable trigger spring (31) is fixedly connected to the front end of the upper table (3). The middle part of the trigger spring (31) is fixed to the middle part of the front side of the lower table (6), and the two ends of the trigger spring (31) are fixed to the two ends of the front side of the upper table (3).

5. The anti-collision seat back table according to claim 1, characterized in that, The upper surface of the panel (1) is provided with movable grooves corresponding to the two upper movable support rods (21). The movable grooves are adapted to the upper movable support rods (21) and are used for storage and limiting when the upper movable support rods (21) rotate. The panel (1) is fixed to the upper surface of the upper table board (3).

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