Lock latch assembly capable of movably adjusting position and backrest lock structure

Abstract

The utility model discloses a plunger latch assembly and a backrest lock structure capable of movably adjusting position, the plunger latch assembly comprises a plunger latch steel wire, a plunger latch fixing support and a backrest plunger latch support, the backrest plunger latch support is fixed on a vehicle body, the backrest plunger latch support is provided with a chute extending up and down, the plunger latch steel wire is fixed on the front side of the plunger latch fixing support, and the backrest plunger latch support is provided with a chute extending up and down. A guide protrusion matched with the sliding groove is arranged on the back face of the plunger latch fixing support, the guide protrusion is embedded into the sliding groove and can slide up and down along the sliding groove, the guide protrusion is limited in the sliding groove in a sliding mode through a limiting bolt, and a reset spring is further arranged between the plunger latch fixing support and the backrest plunger latch support. The reset spring has elastic force for driving the plunger latch fixing support to reset upwards along the sliding groove. The position of the plunger latch steel wire can be flexibly adjusted, so that the locking position of the seat backrest can be continuously adjusted in real time according to different use scenes and requirements of passengers.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and in particular to a latch assembly with adjustable position and a backrest lock structure. Background Technology

[0002] In the continuous development of the automotive industry, car seats, as a key component of the vehicle interior, have always been a focus of attention for consumers and automakers in terms of comfort, safety, and functionality. The car seat backrest locking structure, as an important device ensuring the stability and safety of the seat back, directly affects the overall quality of the seat and the passenger's riding experience. Traditional car seat backrest locking structures typically employ a fixed latch design, with the relative position of the latch to the vehicle body or seat frame remaining constant. This fixed latch structure was widely used in early automobile manufacturing, its main advantages being its simple structure, relatively low manufacturing cost, and ability to meet basic seat backrest locking requirements under typical automotive usage scenarios.

[0003] However, with the continuous advancement of automotive technology and the increasingly diverse functional needs of consumers for car seats, the limitations of traditional fixed latch structures have gradually become apparent. Passengers of different statures and with different driving habits have diverse requirements for the height and tilt angle of the seat back. Due to the limitations of the fixed latch structure, the existing backrest frame cannot be adjusted in height or tilt angle when the backrest is locked, resulting in poor adaptability of the seat back and difficulty in meeting the diverse usage needs of passengers, thus affecting the comfort and convenience of riding. Utility Model Content

[0004] In view of the problems existing in the prior art, the present invention aims to provide a latch assembly and backrest lock structure with adjustable position, which can adjust the locking position of the seat back in real time and continuously according to different usage scenarios and passenger needs.

[0005] To achieve the above objectives, this utility model proposes a movable and adjustable latch assembly, including a latch wire, a latch fixing bracket, and a backrest latch bracket. The backrest latch bracket is fixed to the vehicle body and has a vertically extending slide groove. The latch wire is fixed to the front of the latch fixing bracket, and the back of the latch fixing bracket has a guide protrusion that matches the slide groove. The guide protrusion is embedded in the slide groove and can slide up and down along it. The guide protrusion is slidably limited in the slide groove by a limiting bolt. A return spring is also provided between the latch fixing bracket and the backrest latch bracket. The return spring has an elastic force that drives the latch fixing bracket to return upward along the slide groove.

[0006] In the above solution: a bushing is provided inside the slide groove, and the guide protrusion is embedded in the bushing and can slide up and down along it. The presence of the bushing greatly extends the service life of the component, ensures the smooth movement of the latch wire, and helps to eliminate frictional noise between the guide protrusion and the slide groove.

[0007] In the above scheme: there are two limiting bolts, arranged vertically at intervals. The shank of each limiting bolt extends from the backrest latch bracket into the bushing and is fixed to the guide protrusion, thereby limiting the sliding of the latch fixing bracket within the slide groove. The vertically spaced arrangement of the two limiting bolts provides good limiting and stabilizing effect on the movement of the latch fixing bracket within the slide groove. Specifically, the middle part of the backrest latch bracket arches forward relative to the left and right ends, and the slide groove is located at the arch. This design provides space for the installation of the limiting bolts, facilitating their installation from the back of the backrest latch bracket.

[0008] In the above scheme: the reset spring is a tension spring, the upper end of which is fixed to the backrest latch bracket, and the lower end of which is fixed to the latch fixing bracket. The structure is simple and the installation is convenient.

[0009] In the above scheme: the top of both the backrest latch bracket and the latch fixing bracket are vertically provided with horizontal lugs, and the return spring is connected between the two horizontal lugs. The presence of the horizontal lugs facilitates the installation of the return spring.

[0010] This utility model also proposes a backrest lock structure, including a backrest frame, with a backrest lock at the upper end of the backrest frame, and also including the aforementioned movable and adjustable latch assembly. The backrest lock is locked to the latch wire. When the backrest frame moves downward, it can pull the latch wire downward, thereby causing the guide protrusion on the latch fixing bracket to slide downward along the slide groove to achieve adjustment of the locking position.

[0011] Specifically, the lower end of the backrest frame is rotatably connected to the slide rail assembly. The slide rail assembly can drive the backrest frame to move forward. When the slide rail assembly drives the backrest frame to slide forward, the lower end of the backrest frame can rotate backward around the slide rail assembly. At the same time, the upper end of the backrest frame can pull the locking wire downward to complete the tilt angle adjustment of the backrest frame.

[0012] The beneficial effects of this utility model are:

[0013] By incorporating a latch fixing bracket with up-and-down sliding function and a return spring, the position of the latch wire can be flexibly adjusted. This allows for real-time and continuous adjustment of the seat back locking position according to different usage scenarios and passenger needs. Compared with existing technologies, this method offers numerous advantages, including simple structure, convenient adjustment, low cost, and high safety and reliability. It effectively solves the problems existing in traditional fixed latch structures and current improvements, providing a completely new solution for the development of automotive seat back lock technology. This innovation has significant innovative value and broad application prospects. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model (the backrest lock is not locked onto the latch assembly).

[0015] Figure 2 This is an exploded view of the latch assembly.

[0016] Figure 3 This is a schematic diagram of the application of this utility model to a car seat. Detailed Implementation

[0017] like Figure 1 As shown in Figure 3, a movable and adjustable latch assembly mainly consists of a latch wire 105, a latch fixing bracket 103, and a backrest latch bracket 101.

[0018] The backrest latch bracket 101 is fixed to the vehicle body. The backrest latch bracket 101 is provided with a vertically extending slide groove. The latch wire 105 is fixed to the front of the latch fixing bracket 103. The back of the latch fixing bracket 103 is provided with a guide protrusion 107 that matches the slide groove. The guide protrusion 107 is embedded in the slide groove and can slide up and down along it. The guide protrusion 107 is slidably limited in the slide groove by the limiting bolt 106.

[0019] A return spring 104 is also provided between the latch fixing bracket 103 and the backrest latch bracket 101. The return spring 104 has an elastic force that drives the latch fixing bracket 103 to return upward along the slide groove.

[0020] Preferably, a bushing 102 is provided inside the slide groove, and the guide protrusion 107 is embedded in the bushing 102 and can slide up and down along it. The presence of the bushing 102 greatly extends the service life of the component, ensures the smooth movement of the latch wire 105, and helps to eliminate frictional noise between the guide protrusion 107 and the slide groove.

[0021] Ideally, there should be two limiting bolts 106, arranged vertically at intervals. The shank of the limiting bolt 106 extends from the backrest latch bracket 101 into the bushing 102 and is fixed to the guide protrusion 107, thereby limiting the sliding of the latch fixing bracket 103 within the slide groove. The vertically spaced arrangement of the two limiting bolts 106 provides good limiting and stabilizing effect on the movement of the latch fixing bracket 103 within the slide groove. Specifically, the middle part of the backrest latch bracket 101 arches forward relative to the left and right ends, and the slide groove is located at the arch. This design provides space for the installation of the limiting bolts 106, facilitating the installation of the limiting bolts 106 from the backrest latch bracket 101.

[0022] Ideally, the return spring 104 is a tension spring, with its upper end fixed to the backrest latch bracket 101 and its lower end fixed to the latch fixing bracket 103. This design is simple and easy to install.

[0023] Ideally, both the top of the backrest latch bracket 101 and the latch fixing bracket 103 are vertically provided with horizontal lugs, and the return spring 104 is connected between the two horizontal lugs. The presence of the horizontal lugs facilitates the installation of the return spring 104.

[0024] A backrest lock structure includes a backrest frame 2 and the aforementioned movable and adjustable latch assembly 1. The upper end of the backrest frame 2 is provided with a backrest lock 201, which is locked to the latch wire 105. When the backrest frame 2 moves downward, it can pull the latch wire 105 downward, thereby causing the guide protrusion 107 on the latch fixing bracket 103 to slide downward along the slide groove to realize the adjustment of the locking position.

[0025] Specifically, the lower end of the backrest frame 2 is rotatably connected to the slide rail assembly 3. The slide rail assembly 3 can drive the backrest frame 2 to move forward. When the slide rail assembly 3 drives the backrest frame 2 to slide forward, the lower end of the backrest frame 2 can rotate backward around the slide rail assembly 3. At the same time, the upper end of the backrest frame 2 can pull the locking wire 105 downward to complete the tilt angle adjustment of the backrest frame 2.

Claims

1. A latch assembly with adjustable position, comprising a latch wire (105), characterized in that: It also includes a latch fixing bracket (103) and a backrest latch bracket (101). The backrest latch bracket (101) is fixed to the vehicle body and has a vertically extending slide groove. The latch wire (105) is fixed to the front of the latch fixing bracket (103). The back of the latch fixing bracket (103) has a guide protrusion (107) that matches the slide groove. The guide protrusion (107) is embedded in the slide groove and can slide up and down along it. The guide protrusion (107) is slidably limited in the slide groove by a limiting bolt (106). A return spring (104) is also provided between the latch fixing bracket (103) and the backrest latch bracket (101). The return spring (104) has an elastic force that drives the latch fixing bracket (103) to return upward along the slide groove.

2. The latch assembly with adjustable position according to claim 1, characterized in that: The groove is provided with a bushing (102), and the guide protrusion (107) is embedded in the bushing (102) and can slide up and down along it.

3. The latch assembly with adjustable position according to claim 2, characterized in that: There are two limiting bolts (106), which are arranged vertically and horizontally. The rod of the limiting bolt (106) extends from the back of the backrest latch bracket (101) into the bushing (102) and is fixed on the guide protrusion (107) so as to limit the sliding of the latch fixing bracket (103) in the slide groove.

4. The latch assembly with adjustable position according to claim 1, characterized in that: The reset spring (104) is a tension spring, with its upper end fixed to the backrest latch bracket (101) and its lower end fixed to the latch fixing bracket (103).

5. The latch assembly with adjustable position according to claim 4, characterized in that: The top ends of the backrest latch bracket (101) and the latch fixing bracket (103) are both vertically provided with horizontal lugs, and the reset spring (104) is connected between the two horizontal lugs.

6. A backrest lock structure, comprising a backrest frame (2), wherein a backrest lock (201) is provided at the upper end of the backrest frame (2), characterized in that: It also includes a movable adjustable latch assembly (1) as described in any one of claims 1-5, wherein the backrest lock (201) is locked onto the latch wire (105), and when the backrest frame (2) moves downward, it can pull the latch wire (105) downward, thereby causing the guide protrusion (107) on the latch fixing bracket (103) to slide downward along the slide groove to achieve adjustment of the locking position.

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