Lock for back row seat backrest of automobile

Abstract

The utility model relates to an automobile rear seat backrest lock, which belongs to the field of automobile seats and comprises a lock body and a lock rod assembly. The lock body comprises a left shell and a right shell; the lock body further comprises an unlocking handle, a spring bolt and a tuning fork. The unlocking handle is connected with the left shell and the right shell through a rotating shaft; sliding holes are formed in the lower ends of the unlocking handles; guide rails are arranged on the inner wall of the left shell; the spring bolt is slidably connected with the guide rail; a spring fixing plate is fixedly connected above the spring bolt; the first spring and the second spring are connected with the spring fixing plate and the left shell; the upper end of the connecting rod is inserted into the sliding hole; the lower end of the connecting rod is inserted into a hole in the spring bolt; the tail end of the tuning fork is fixedly connected to the left shell, and the opening end supports the lower end of the spring bolt; the lock rod assembly comprises a lock rod, a supporting piece and a connecting piece. Due to the fact that the tuning fork is arranged below the spring bolt, after the spring bolt is successfully inserted into the lock hole, the tuning fork can be impacted to make a clear sound to remind a passenger that the rear-row seat is locked, and potential damage caused by the fact that the passenger does not lock the seat is avoided.

Description

Technical Field

[0001] This utility model relates to the field of automotive seats, and more particularly to a locking device for the backrest of a rear seat in an automotive vehicle. Background Technology

[0002] After unlocking, the rear seat backrest of a car can rotate forward and lie flat. Once reset, a locking device secures it to the car frame to prevent accidental forward tilting during braking, which could injure passengers. Existing rear seat backrest locks consist of a lock body fixedly connected to the rear seat and a locking rod fixedly connected to the car frame. Their shortcomings are: 1. After unlocking, an indicator behind the unlocking handle pops out, indicating the seat can be laid flat; after locking, the indicator retracts, indicating the seat has been reset. However, due to the small size of the indicator, passengers cannot easily determine whether the backrest is unlocked or locked by observation or touch. If it is not unlocked, passengers cannot lay the seat flat no matter how hard they try; if it is not locked, the rear seat backrest may accidentally tilt forward during braking, causing passenger injury. 2. Existing lock bodies already include a housing containing an independent lock cylinder, resulting in a complex structure and high manufacturing cost. Summary of the Invention

[0003] This utility model addresses the shortcomings of existing technologies by developing a car rear seat backrest lock. The technical solution adopted by this utility model is: a car rear seat backrest lock, characterized by comprising a lock body 1 and a lock rod assembly 2; the lock body 1 includes a left housing 4 and a right housing 5; the left housing 4 and the right housing 5 are connected by bolts; the lock body 1 also includes an unlocking handle 3, a locking tongue 13, and a tuning fork 17; the unlocking handle 3 is connected to the left housing 4 and the right housing 5 via a rotating shaft 21; the unlocking handle 3 has a slot 8; the lower end of the unlocking handle 3 has a sliding hole 9; the inner wall of the left housing 4 has a guide rail 14; the locking tongue 13 is slidably connected to the guide rail 14; a spring fixing plate 11 is fixedly connected above the locking tongue 13; the upper ends of a first spring 12 and a second spring 19 are respectively fixedly connected to the lower part of the spring fixing plate 11, and their lower ends are respectively fixed... The connecting rod 10 is connected to the left housing 4; the upper end of the connecting rod 10 is inserted into the sliding hole 9, and its upper end can slide within the sliding hole 9; the upper end of the connecting rod 10 is provided with a fixing piece 20; the lower end of the connecting rod 10 is inserted into the hole on the latch 13; the connecting rod 10 can rotate relative to the latch 13, and can lift the latch 13 when it moves upward; the tail end of the tuning fork 17 is fixedly connected to the left housing 4, and its open end supports the lower end of the latch 13; the locking rod assembly 2 includes a locking rod 16, a support piece 6, and a connecting piece 7; the locking rod 16 is fixedly connected to the support piece 6; a locking hole 18 is opened on the locking rod 16; the support piece 6 is fixedly connected to the connecting piece 7; a rubber pad 15 is fixedly provided on the support piece 6.

[0004] The advantages of this utility model are as follows: 1. Because a rubber pad is set on the support plate, the seat back helps to disengage from the locking bar after the locking tongue disengages from the locking hole on the locking bar; because a tuning fork is set below the locking tongue, the locking tongue can strike the tuning fork to produce a crisp sound after successfully inserting into the locking hole, prompting the passenger that the rear seat has been locked, thus avoiding potential damage caused by the passenger not locking the seat; 2. Because the locking tongue is directly inserted into the locking bar inside the housing, there is no need to use an independent lock cylinder, which reduces production costs. Attached Figure Description

[0005] Figure 1 This is a front view schematic diagram of the structure of a car rear seat backrest lock according to this utility model;

[0006] Figure 2 This is a left-side view of the structure of a car rear seat backrest lock according to this utility model (right housing has been removed);

[0007] Figure 3 This is a right-side view of the structure of the unlocking handle 3 of this utility model;

[0008] Figure 4 This is a magnified front view schematic diagram of the locking rod assembly of this utility model;

[0009] Figure 5 This is a top-view enlarged schematic diagram of the locking rod assembly of this utility model;

[0010] Figure 6 This is a schematic diagram of the unlocking process of the lock body of this utility model;

[0011] Figure 7 This is a schematic diagram of the state of the lock body after it is unlocked and as it is laid flat with the seat back.

[0012] Figure 8 This is a schematic diagram showing the state of the locking tongue and locking rod of this utility model when the seat back is in contact during the reset process;

[0013] Figure 9 This is a schematic diagram showing the state after the seat backrest has been reset and the lock body and lock rod of this utility model have been locked.

[0014] In the diagram: 1 Lock body; 2 Lock rod assembly; 3 Unlock handle; 4 Left housing; 5 Right housing; 6 Support plate; 7 Connecting plate; 8 Slot; 9 Sliding hole; 10 Connecting rod; 11 Spring fixing plate; 12 First spring; 13 Lock tongue; 14 Guide rail; 15 Rubber pad; 16 Lock rod; 17 Tuning fork; 18 Lock hole; 19 Second spring; 20 Fixing plate; 21 Rotating shaft. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] like Figures 1 to 5As shown, a car rear seat backrest lock of this utility model includes: a lock body 1 and a lock rod assembly 2; the lock body 1 includes a left housing 4 and a right housing 5; the left housing 4 and the right housing 5 are connected by bolts; the lock body 1 also includes an unlocking handle 3, a locking tongue 13 and a tuning fork 17; the unlocking handle 3 is connected to the left housing 4 and the right housing 5 via a rotating shaft 21; the unlocking handle 3 has a slot 8; the lower end of the unlocking handle 3 has a sliding hole 9; the inner wall of the left housing 4 has a guide rail 14; the locking tongue 13 is slidably connected to the guide rail 14; a spring fixing plate 11 is fixedly connected above the locking tongue 13; the upper ends of the first spring 12 and the second spring 19 are respectively fixedly connected to the lower part of the spring fixing plate 11, and their lower ends are respectively fixedly connected to the... The left housing 4 is equipped with a connecting rod 10. The upper end of the connecting rod 10 is inserted into the sliding hole 9, and its upper end can slide within the sliding hole 9. The upper end of the connecting rod 10 is provided with a fixing piece 20. The lower end of the connecting rod 10 is inserted into the hole on the latch 13. The connecting rod 10 can rotate relative to the latch 13, and can lift the latch 13 when it moves upward. The tail end of the tuning fork 17 is fixedly connected to the left housing 4, and its open end supports the lower end of the latch 13. The locking rod assembly 2 includes a locking rod 16, a support piece 6, and a connecting piece 7. The locking rod 16 is fixedly connected to the support piece 6. The locking rod 16 has a locking hole 18. The support piece 6 is fixedly connected to the connecting piece 7. A rubber pad 15 is fixedly provided on the support piece 6.

[0017] The upper end of the connecting rod 10 is provided with a fixing piece 20. The function of the fixing piece 20 is to prevent the connecting rod 10 from detaching from the sliding hole 9.

[0018] The lock body 1 of this utility model is fixedly connected to the rear seat, and the lock rod assembly 2 is fixedly connected to the car frame.

[0019] In practice, when passengers need to fold down the rear seats, such as Figure 5 and Figure 6 As shown, the passenger inserts their finger into the slot 8 on the unlocking handle 3 and pulls the unlocking handle 3, causing it to rotate counterclockwise as shown in the figure. The lower end of the sliding hole 9 pulls the connecting rod 10 upward, and the connecting rod 10 lifts the locking tongue 13 upward, causing it to disengage from the locking hole 18 on the locking rod 16. The rubber pad 15 on the fixing plate 20 has a certain elasticity to the lock body. In addition, since the direction in which the passenger pulls the unlocking handle is the same as the direction in which the rear seat is laid flat, the rear seat of the car using this utility model is relatively more convenient to lay flat compared to the rear seat that is unlocked by pulling up or pressing down. Figure 7As shown, after unlocking, the passenger's finger leaves the unlocking handle 3. The first spring 12 and the second spring 19 pull down the spring fixing plate 11, causing the locking tongue 13 to move downward. The connecting rod 10 pulls the unlocking handle 3 downward to reset it. The tuning fork 17 supports the locking tongue 13, stopping its downward movement. If the passenger releases the unlocking handle 3 quickly, the locking tongue 13 may strike the tuning fork 17 and make a sound. If the passenger releases the unlocking handle 3 slowly, the locking tongue 13 rebounds more slowly, the strike on the tuning fork 17 is lighter, and the sound emitted by the tuning fork 17 is smaller or no sound is emitted.

[0020] When passengers return the rear seats to their original position, such as Figure 8 As shown, the locking rod 16 presses against the inclined surface of the locking tongue 13, causing it to move upwards, and the connecting rod 10 also moves upwards within the sliding hole 9, as... Figure 5 and Figure 9 As shown, when the first spring 12 and the second spring 19 pull down the spring fixing plate 11, causing the locking tongue 13 to move downwards and its lower end to insert into the lock hole 18, the lower end of the locking tongue 13 strikes the tuning fork 17, making it make a sound. When the passenger hears this sound, it indicates that the rear seat backrest is locked. At this time, the support plate 6 blocks the lock body 1, and the lock body 1 squeezes the rubber pad 15.

[0021] The embodiment of this utility model only takes the lock on the left side of the rear seat as an example. The lock on the right side has the same structure as the lock on the left side, the only difference being that they are mirror images of each other.

[0022] The above description is only a preferred embodiment of the present utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the scope of protection of the present utility model.

Claims

1. A car rear seat backrest lock, characterized in that, The lock includes a lock body (1) and a lock rod assembly (2); the lock body (1) includes a left housing (4) and a right housing (5); the left housing (4) and the right housing (5) are connected by bolts; the lock body (1) also includes an unlocking handle (3), a bolt (13) and a tuning fork (17); the unlocking handle (3) is connected to the left housing (4) and the right housing (5) by a pivot (21); the unlocking handle (3) has a slot (8); the unlocking handle (3) has a sliding hole (9) at its lower end; the inner wall of the left housing (4) has a guide rail (14); the bolt (13) is slidably connected to the guide rail (14); a spring fixing plate (11) is fixedly connected above the bolt (13); the upper ends of the first spring (12) and the second spring (19) are respectively fixedly connected to the lower part of the spring fixing plate (11), and the lower ends of the two are respectively fixedly connected to the left housing (4); The upper end of the connecting rod (10) is inserted into the sliding hole (9), and its upper end can slide in the sliding hole (9); the upper end of the connecting rod (10) is provided with a fixing piece (20); the lower end of the connecting rod (10) is inserted into the hole on the latch (13); the connecting rod (10) can rotate relative to the latch (13), and when it moves upward, it can lift the latch (13); the tail end of the tuning fork (17) is fixedly connected to the left housing (4), and its open end supports the lower end of the latch (13); the locking rod assembly (2) includes a locking rod (16), a support piece (6) and a connecting piece (7); the locking rod (16) is fixedly connected to the support piece (6); a locking hole (18) is opened on the locking rod (16); the support piece (6) is fixedly connected to the connecting piece (7); a rubber pad (15) is fixedly provided on the support piece (6).

Images