A lower door trim and a lower door apron assembly having the same

Abstract

The present application relates to the field of vehicle body, specifically a kind of car door lower decorative part and the car door lower apron assembly with the car door lower decorative part, including trim body, the trim body is equipped with clamping unit;The trim body can be connected on car door lower apron by clamping unit;The clamping unit includes multiple clamping structures;Each clamping structure includes the clamping mechanism and / or hanging mechanism arranged on the trim body;The clamping mechanism includes two clamping strips spaced apart on the trim body;The clamping strip includes clamping strip base body, and the clamping strip base body end is equipped with clamping protrusion;The hanging mechanism includes the guide clamping hook arranged on the trim body;The present application is used by the cooperation of clamping unit and clamping seat unit;The installation and fixation of car door lower decorative plate can be facilitated, to avoid the trouble of traditional screw or glue joint.

Description

Technical Field

[0001] This invention relates to the field of vehicle bodies, specifically to a lower door trim piece and a lower door guard plate assembly having the lower door trim piece. Background Technology

[0002] Traditionally, lower door trim pieces and lower door panels are connected using screws. While screw connections offer good strength, they require the use of installation tools to turn the screws, which hinders the efficient assembly of lower door trim pieces.

[0003] Therefore, in order to improve the above problems, a door trim piece that does not require screw installation is now needed. Summary of the Invention

[0004] The purpose of this invention is to provide a door trim piece that is easy to install and remove.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A lower door trim piece includes a trim strip body with a snap-fit ​​unit on the trim strip body; the trim strip body can be connected to the lower door panel via the snap-fit ​​unit.

[0007] The snap-fit ​​unit includes multiple snap-fit ​​structures; each snap-fit ​​structure includes a snap-fit ​​mechanism and / or a hanging mechanism disposed on the trim body;

[0008] The snap-fit ​​mechanism includes two snap-fit ​​strips spaced apart on the trim body;

[0009] The buckle strip includes a buckle strip base, and a buckle protrusion is provided at the end of the buckle strip base;

[0010] The attachment mechanism includes guide hooks disposed on the trim body.

[0011] The trim body includes a trim base plate, on which a frame plate is provided; the snap-fit ​​unit is connected to the frame plate.

[0012] The buckle protrusion has an assembly guide slope at the end away from the buckle base.

[0013] The buckle strip also includes an elastic mechanism disposed on the buckle strip base.

[0014] The elastic mechanism includes an elastic arc plate disposed on the card strip base, with both ends of the elastic arc plate connected to the card strip base respectively, and the middle region of the elastic arc plate being spaced apart from the card strip base.

[0015] The two buckle strips are symmetrically distributed; a connecting mechanism is provided between the two buckle strips, the connecting mechanism including a stress relief belt, the two ends of which are respectively connected to a buckle strip.

[0016] The unloading belt includes a belt body, on which multiple material reduction grooves are provided.

[0017] The guide hook includes a first locking block and a second locking block. The second locking block is connected to the trim body through the first locking block. The guide hook has an L-shaped vertical cross-section. The second locking block is provided with a pushing slope.

[0018] A door lower guard plate assembly includes a door lower guard plate, on which a door lower trim piece is provided. The door lower guard plate includes a lower guard plate body, on which a mounting unit is provided, each mounting unit corresponding to a snap-fit ​​unit. The mounting unit includes a mounting plate disposed on the lower guard plate body and a snap-fit ​​groove disposed on the lower guard plate. The snap-fit ​​mechanism is connected to the mounting plate, and a guide hook is arranged through the snap-fit ​​groove and passing through the lower guard plate body. A second snap-fit ​​block in the guide hook is hooked onto the lower guard plate body.

[0019] The card holder plate includes an end connecting plate, and both ends of the end connecting plate are connected to the lower guard plate body through side connecting plates respectively; the vertical cross section of the card holder plate is U-shaped; each carding unit includes two spaced guide hooks; each card holder unit includes two spaced card slots; one guide hook corresponds to one card slot.

[0020] The advantages of this invention are:

[0021] This invention discloses a lower door trim piece and a lower door guard plate assembly having the lower door trim piece.

[0022] The lower door trim disclosed in this invention uses a snap-fit ​​unit and a mounting unit in conjunction to facilitate the installation and fixing of the lower door trim panel, avoiding the inconvenience of traditional screw or glue bonding.

[0023] This invention uses a combination of a snap-fit ​​mechanism (snap-fit ​​strip) and a hook-fit mechanism (guide hook), which is more reliable than traditional single snap-fit ​​fixing and can effectively prevent decorative parts from making abnormal noises or loosening due to vibration during vehicle operation.

[0024] The buckle strip of this invention has an elastic mechanism (elastic arc plate) that allows the buckle strip to undergo elastic deformation when inserted, which facilitates assembly and absorbs tolerances.

[0025] By setting up the unloading belt, it can act as a central support component during use, ensuring the stability of the connection between the buckle strip and the buckle plate. When the unloading belt is subjected to external pressure, it will cause the two buckle strips to retract, thereby facilitating the separation between the buckling mechanism and the buckle plate, and making the actual disassembly operation convenient.

[0026] In addition, the present invention enables tool-free installation of the lower door trim by using a snap-fit ​​mechanism and a snap-fit ​​seat mechanism in combination. The present invention is fixed entirely by a snap-fit ​​structure, avoiding the cumbersome process of traditional screw connection or glue bonding, and improving assembly efficiency.

[0027] The flexible arc plate design gives the buckle strip elasticity, allowing for easy insertion while accommodating tolerances that may arise during manufacturing and assembly. It also works in conjunction with the guide hooks to ensure the stability of the connection between the lower door trim and the lower door panel. Attached Figure Description

[0028] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0029] Figure 1 This is a first-view structural schematic diagram of the lower door trim piece in this invention.

[0030] Figure 2 This is a structural schematic diagram of the lower door trim piece in the present invention from a second perspective.

[0031] Figure 3 This is a first-view structural schematic diagram of the lower door trim piece and the lower door guard plate of the present invention.

[0032] Figure 4 This is a second-view structural schematic diagram of the lower door trim piece of the present invention connected to the lower door guard plate.

[0033] Figure 5 This is a schematic diagram of the structure of the lower door guard plate in this invention.

[0034] Figure 6 for Figure 5 A magnified view of a portion of the card slot unit in area A.

[0035] Figure 7 This is a schematic diagram of the snap-fit ​​unit in this invention.

[0036] Figure 8 This is a first-view structural schematic diagram of the snap-fit ​​mechanism and the card holder plate in this invention.

[0037] Figure 9 This is a second-view structural schematic diagram of the snap-fit ​​mechanism and the card holder plate in this invention.

[0038] Figure 10This is a cross-sectional view of the snap-fit ​​mechanism connected to the card seat plate in this invention.

[0039] The markings in the above figures are all:

[0040] 1-1. Snap-fit ​​structure; 1-2. Snap-fit ​​unit;

[0041] 1. Lower door trim piece; 2. Clip-on mechanism; 3. Hook-on mechanism; 4. Lower door guard plate. Detailed Implementation

[0042] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0043] A door trim piece 1 includes a trim strip body with a snap-fit ​​unit on the trim strip body; the trim strip body can be connected to the door lower guard plate 4 through the snap-fit ​​unit; the door trim piece 1 disclosed in this invention is mainly arranged on the door lower guard plate 4, and the door trim piece 1 and the door lower guard plate 4 are connected by a snap-fit ​​unit, which facilitates the connection between the two.

[0044] Specifically, the snap-fit ​​unit of the present invention includes multiple snap-fit ​​structures 1-1; generally, multiple snap-fit ​​structures 1-1 are arranged sequentially and spaced apart along the length direction of the lower trim piece 1 of the door; each snap-fit ​​structure 1-1 includes a snap-fit ​​mechanism 2 and / or a hooking mechanism 3 provided on the trim body; the snap-fit ​​mechanism 2 and the hooking mechanism 3 are generally used simultaneously, but can be selected according to specific working conditions. In the present invention, the snap-fit ​​mechanism 2 includes two buckle strips 21 spaced apart on the trim body; the buckle strip 21 includes a buckle base 211, and the end of the buckle base 211 is provided with a buckle protrusion 213; the buckle base 211 and the buckle protrusion 213 form a barb structure, which can be hooked onto the buckle seat plate 42, thereby realizing the connection between the snap-fit ​​mechanism 2 and the lower trim piece 4 of the door.

[0045] In addition, the hooking mechanism 3 described in this invention includes a guide hook 301 disposed on the trim body; the guide hook 301 is essentially a hook structure, which is mainly attached to the lower door guard plate 4, thereby realizing the connection between the lower door trim piece 1 and the lower door guard plate 4.

[0046] In this invention, the guide hook 301 and the buckle strip 21 are distributed in parallel at intervals and generally face the same direction.

[0047] The hooking mechanism 3 of the present invention generally includes two guide hooks 301, which are distributed on opposite sides of the hooking mechanism 2. Through the cooperation of the guide hooks 301 with the corresponding card slots 43, the accuracy and stability of the docking between the hooking mechanism 2 and the card seat plate 42 can be guaranteed.

[0048] Furthermore, in this invention, the trim body includes a trim base plate 11, which is the main structure of the trim body. A frame plate 12 is provided on the trim base plate 11. The frame plate 12 is disposed on the side of the trim base plate 11 near the lower door guard plate 4. The frame plate 12 serves as a connecting plate and a reinforcing plate. The connecting plate facilitates the arrangement of the snap-fit ​​unit. In this invention, the snap-fit ​​unit is connected to the frame plate 12. The frame plate 12 also acts as a reinforcing member on the inner side of the trim base plate 11, ensuring the overall structural strength of the lower door trim piece 1.

[0049] In this invention, the end of the buckle protrusion 213 away from the card strip base 211 is provided with an assembly guide slope. In this invention, the assembly guide slope is mainly arranged on the outer side of the buckle protrusion 213. It is mainly used for guiding the buckle protrusion when it is inserted into the card seat plate 42, so as to avoid the existence of the buckle protrusion affecting the insertion between the buckling mechanism 2 and the card seat plate 42.

[0050] The buckle strip 21 described in this invention also includes an elastic mechanism disposed on the buckle strip base 211. In this invention, the elastic mechanism is arranged on the side of the buckle strip base 211 near the lower door trim piece 1. After being inserted into the buckle seat plate 42, it is pressed against the end connecting plate 421 in the buckle seat plate 42. One function is to prevent the buckle strip 21 from shaking in the buckle seat plate 42. Another function is that it can be used with the guide hook 301 to ensure the tight fit between the lower door trim piece 1 and the lower door guard plate 4.

[0051] Furthermore, the elastic mechanism described in this invention includes an elastic arc plate 213 disposed on the card strip base 211. The two ends of the elastic arc plate 213 are respectively connected to the card strip base 211, and the middle area of ​​the elastic arc plate 213 is spaced apart from the card strip base 211. The elastic arc plate 213 is essentially an arch bridge structure. The elastic arc plate 213 and the card strip base 211 can be an integral structure or an external structure added later. Elasticity is provided by the deformation of the elastic arc plate 213. In this invention, the elastic arc plate 213 and the card seat plate 42 are pressed against each other, so that after being inserted into the card seat plate 42, it is pressed against the end connecting plate 421 in the card seat plate 42. One function is to avoid the buckle strip 21 shaking in the card seat plate 42. Another function is that it can be used with the guide hook 301 to ensure the tight fit between the lower door trim piece 1 and the lower door guard plate 4.

[0052] Furthermore, in this invention, the two snap-fit ​​strips 21 are symmetrically distributed; a connecting mechanism is provided between the two snap-fit ​​strips 21, which ensures the linkage and integrity of the two snap-fit ​​strips 21; the connecting mechanism in this invention includes a stress-relieving belt, the two ends of which are respectively connected to a snap-fit ​​strip 21; the stress-relieving belt has multiple functions in this invention, one of which is that the stress-relieving belt can act as a support reinforcement, and when not subjected to external force, the stress-relieving belt can provide support force to the two snap-fit ​​strips 21, ensuring the stability of the snap-fit ​​strips 21 when hooked to the seat plate 42 during subsequent connection.

[0053] When subjected to external force, the unloading band moves or deforms, causing the ends of the two buckle strips 21 to move closer to each other, thereby enabling the buckle protrusions 213 in the buckle strips 21 to disengage from the seat plate 42, and thus enabling the buckling mechanism 2 to disengage from the seat mechanism; facilitating the subsequent disassembly and replacement of the lower door trim piece 1.

[0054] The stress relief belt described in this invention includes a belt body, on which a plurality of material reduction grooves are provided; the material reduction grooves reduce the weight of the parts, reduce the amount of material used, and most importantly, facilitate subsequent deformation operations.

[0055] In this invention, the guide hook 301 includes a first hook block and a second hook block. The second hook block is connected to the trim body through the first hook block. The guide hook 301 has an L-shaped vertical cross-section. In this invention, the first hook block is set perpendicular to the second hook block and also perpendicular to the buckle strip 21. The second hook block is set parallel to the buckle strip 21. In subsequent use, the first hook block is inserted into the corresponding buckle groove 43, and the second hook block passes through the buckle groove 43 and is located on the other side of the lower door guard plate 4. When the snap-fit ​​mechanism 2 snaps into the buckle plate 42, the second hook block is also equivalent to being hung on the lower door guard plate 4. Based on this design, the connection between the guide hook 301 and the lower door guard plate 4 is guaranteed.

[0056] Meanwhile, in this invention, the second card block is provided with a pushing slope. In this invention, the pushing slope is located on the side of the second card block closer to the trim base plate 11, which makes the second card block equivalent to a wedge-shaped block structure. The second card block and the frame plate 12 form a flared structure, that is, an opening that is larger on the outside and smaller on the inside. This setting facilitates the attachment of the second card block to the lower door guard plate 4. Through the gradual contact between the second card block and the lower door guard plate 4, the elastic mechanism can be kept in a compressed state, thereby ensuring the stability and tightness of the connection between the lower door trim piece 1 and the lower door guard plate 4.

[0057] A door lower guard plate assembly 4 includes a door lower guard plate 4, on which a door lower trim piece 1 is provided. The door lower guard plate 4 includes a lower guard plate body 41, on which a mounting unit 1-2 is provided. Each mounting unit 1-2 corresponds to one mounting unit. The present invention achieves a stable connection between the door lower guard plate 4 and the door lower trim piece by using multiple mounting units and multiple mounting units 1-2 in cooperation.

[0058] In this invention, the card holder unit 1-2 includes a card holder plate 42 disposed on the lower guard plate body 41 and a card strip groove 43 disposed on the lower guard plate; the card engaging mechanism 2 is connected to the card holder plate 42, and the guide hook 301 is arranged through the card strip groove 43 through the lower guard plate body 41; the second card block in the guide hook 301 is hooked on the lower guard plate body 41; the card holder plate 42 is equivalent to a transverse through groove formed on the lower guard plate body 41, mainly to facilitate the insertion and hooking of the card engaging mechanism 2; the card strip groove 43 plays a role in avoidance and guidance; the end of the card strip groove 43 cooperates with the guide hook 301 to realize the secondary hooking and fixing of the lower door trim 1 and the lower door guard plate 4.

[0059] In this invention, the card seat plate 42 includes an end connecting plate 421, the two ends of which are connected to the lower guard plate body 41 via side connecting plates 422; the vertical cross section of the card seat plate 42 is U-shaped; the card seat plate 42 is equivalent to a U-shaped plate inverted on the lower guard plate body 41; the two side connecting plates 422 are respectively hooked to a buckle strip 21, and the end connecting plate 421 is used to cooperate with the elastic mechanism to realize the compression and limiting of the snap-fit ​​mechanism 2.

[0060] In this invention, each snap-fit ​​unit includes two spaced-apart guide hooks 301; each snap-fit ​​seat unit 1-2 includes two spaced-apart snap-fit ​​grooves 43; one guide hook 301 corresponds to one snap-fit ​​groove 43; the two guide hooks 301 and the two snap-fit ​​grooves 43 cooperate with each other to play a good calibrating and guiding role, ensuring the straightness of the snap-fit ​​mechanism 2 when it is inserted into the snap-fit ​​seat plate 42; at the same time, the two guide hooks 301 can also be hooked on the lower door guard plate 4, which better ensures the stability of the connection between the lower door trim piece 1 and the lower door guard plate 4.

[0061] In this invention, in order to facilitate the two buckle strips 21 to be snapped onto the two side connecting plates 422 respectively, the shortest distance between the two outer sides of the two side connecting plates 422 is required to be equal to the shortest distance between the outer sides of the two buckle bases 211; the buckle protrusion 213 is equivalent to the protruding point on the buckle base 211.

[0062] The present invention discloses a lower door trim piece 1 and a lower door guard plate 4 assembly having the trim piece.

[0063] The lower door trim piece 1 includes a trim strip body. The trim strip body is composed of a trim strip base plate 11 and a frame plate 12 disposed on the inner side of the trim strip base plate 11 (near the lower door guard plate 4). The frame plate 12 serves not only as a structural reinforcement but also as a connector for the snap-fit ​​unit.

[0064] The snap-fit ​​unit includes multiple snap-fit ​​structures 1-1 distributed along the length of the trim body. Each snap-fit ​​structure 1-1 includes a snap-fit ​​mechanism 2 and a hook-fit mechanism 3.

[0065] The snap-fit ​​mechanism 2 includes two symmetrically spaced snap-fit ​​strips 21 on the frame plate 12. Each snap-fit ​​strip 21 consists of a snap-fit ​​strip base 211 and snap-fit ​​protrusions 213 at its ends. The outer ends of the snap-fit ​​protrusions 213 are provided with assembly guide slopes. The snap-fit ​​strip base 211 is also provided with an integrally formed elastic mechanism, which is preferably an arch-shaped elastic arc plate 213. Its two ends are connected to the snap-fit ​​strip base 211, and its middle area is suspended from the snap-fit ​​strip base 211 to provide stable elastic deformation capability.

[0066] Connecting mechanism (unloading belt): An unloading belt is provided between two symmetrical buckle bars 21. The two ends of the unloading belt are connected to the two buckle bars 21 respectively, and multiple material reduction grooves are provided on the belt body.

[0067] The hooking mechanism 3 includes two spaced-apart guide hooks 301, typically arranged on both sides of the hooking mechanism 2. The guide hooks 301 have an L-shaped vertical cross-section and consist of a first hook block connected to the frame plate 12 and a second hook block for hooking. The second hook block has a pushing ramp, and the second hook block and the frame plate 12 form a funnel-shaped guide opening that is wider on the outside and narrower on the inside.

[0068] The lower door guard plate 4 assembly structure includes the lower door guard plate 4 and the aforementioned lower door trim piece 1. The lower door guard plate 4 includes a lower guard plate body 41, on which are provided mounting units 1-2 corresponding to the mounting units.

[0069] The card holder unit 1-2 includes a card holder plate 42 and card slots 43. The card holder plate 42 has a vertical cross-section in the shape of a "[" and is composed of an end connecting plate 421 and side connecting plates 422 that are connected to both ends of the end connecting plate 421 and connected to the lower guard plate body 41. Two card slots 43 are provided through the lower guard plate body 41, corresponding one-to-one with the positions of the guide hooks 301.

[0070] Assembly process: During assembly, first align the guide hook 301 with the retaining strip groove 43. Guided by the retaining strip groove 43, the engaging mechanism 2 enters the area of ​​the retaining plate 42. Under the action of the assembly guide slope, the latching protrusion 213 squeezes the two latching strips 21 inward until the latching protrusion 213 passes over the side connecting plate 422 of the retaining plate 42. At this time, the latching strips 21 spring back under the reset action of the elastic arc plate 213, and the latching protrusion 213 is reliably hooked onto the side connecting plate 422.

[0071] Stable state: After assembly, the elastic arc plate 213 and the end connecting plate 421 of the card seat plate 42 form elastic compression, eliminating the gap between the buckle strip 21 and the card seat plate 42, ensuring the tightness of the connection and vibration resistance.

[0072] Disassembly principle: During disassembly, the tool is applied to the unloading belt, which is deformed or displaced under pressure, causing the ends of the two buckle strips 21 to move closer to each other, so that the buckle protrusion 213 is disengaged from the side connecting plate 422, and at the same time the guide hook 301 is withdrawn from the buckle groove 43, thus realizing the disassembly operation.

[0073] Through the specific structural design described above, this invention offers the following significant advantages over existing technologies:

[0074] A double-layered, secure mechanism enhances connection reliability.

[0075] This invention employs a combined fixing scheme of "buckle strip 21 (buckle mechanism 2) and guide hook 301 (hook mechanism 3)". The buckle strip 21 provides the primary locking force, securing the decorative piece to the mounting plate 42; while the guide hook 301 not only provides initial guidance but also, after installation, its L-shaped second latch hooks onto the lower guard plate body 41, forming an auxiliary anti-detachment structure. This dual fixing method effectively avoids the loosening or abnormal noise problems that may occur with a single buckle under long-term vibration.

[0076] The innovative detachable design allows for non-destructive assembly and disassembly, as well as reuse.

[0077] Traditional clips often require forceful prying during disassembly, which can easily lead to breakage. This invention incorporates a stress-relieving band between two symmetrical clip strips 21. This design achieves two key functions:

[0078] Disassembly function: During disassembly, the external force is applied to the relief belt rather than directly to the buckle itself. The relief belt deforms and causes the buckle strip 21 to retract and disengage, making the disassembly process easy and safe, and completely solving the industry pain point of "breaking upon disassembly".

[0079] Enhanced function: In the normal snap-fit ​​state, the unloading belt acts as a connecting beam, enhancing the structural integrity of the two independent snap-fit ​​strips 21 and preventing them from being accidentally deformed or loosened in the non-disassembly state.

[0080] An optimized assembly guidance system reduces assembly difficulty and the risk of damage.

[0081] This solution incorporates guiding structures at multiple stages:

[0082] The end of the snap-fit ​​strip 21 is provided with an assembly guide ramp, allowing the snap-fit ​​to smoothly pass over the edge of the seat plate 42. The guide hook 301 is provided with a pushing ramp, which, together with the frame plate 12, forms a flared opening, guiding the decorative part to be quickly and accurately inserted into the snap-fit ​​slot 43 even when vision is obstructed. These designs significantly reduce the operating force required for assembly and avoid scratches or whitening on the surface of the plastic parts caused by forced assembly.

[0083] The built-in elastic compensation structure ensures a tight fit over the long term.

[0084] The elastic arc plate 213 on the buckle strip 21 is not a simple protrusion, but rather adopts an arch-bridge hollow structure. After assembly, the elastic arc plate 213 always maintains an elastic compression state with the end connecting plate 421 of the buckle plate 42. This pre-tightening force can automatically absorb dimensional fluctuations caused by manufacturing tolerances or temperature changes, maintaining a tight fit between the lower door trim 1 and the lower door guard plate 4 for a long time, effectively suppressing vibration and abnormal noise during driving.

[0085] The design balances lightweighting and structural strength: The material-reducing grooves on the unloading strip and the frame plate 12 embody the concept of structural optimization. The material-reducing grooves reduce material usage while ensuring sufficient strength and deformation capacity of the unloading strip, contributing to the overall vehicle weight reduction; while the frame plate 12, as the connecting base, strengthens local stiffness, making the clamping force distribution more uniform and avoiding structural damage caused by stress concentration.

[0086] Example:

[0087] In a preferred embodiment, the lower door trim piece 1 of the present invention mainly includes a trim strip body, which forms the basis of the overall structure. Multiple snap-fit ​​units are provided on the inner side of the trim strip body (i.e., the side facing the lower door panel 4). Typically, these snap-fit ​​units are distributed sequentially at intervals along the length of the trim strip body to achieve multi-point fixation and ensure connection stability. Through these snap-fit ​​units, the trim strip body can be easily installed on the lower door panel 4.

[0088] Furthermore, each snap-fit ​​unit is specifically composed of two structures: a snap-fit ​​mechanism 2 and a hook-fit mechanism 3. In practical applications, these two mechanisms are usually used together to form a double fixation. The snap-fit ​​mechanism 2 includes two snap-fit ​​strips 21 spaced apart on the trim body. The structure of each snap-fit ​​strip 21 includes a basic snap-fit ​​base 211, and at the end of the snap-fit ​​base 211, there is an outwardly protruding snap-fit ​​protrusion 213. Together, they form a hook-like structure, which can then be firmly hooked to the card seat plate 42 on the lower door panel 4.

[0089] On the other hand, the hooking mechanism 3 includes guide hooks 301 disposed on the trim strip body. The guide hook 301 is essentially a hook structure used for hooking onto corresponding parts on the lower door panel 4. In this embodiment, the guide hooks 301 and the latching strip 21 are spaced apart and parallel to each other, and their orientations are basically the same. To achieve better positioning and fixing effects, each hooking unit is typically equipped with two guide hooks 301, which are respectively arranged on opposite sides of the hooking mechanism 2.

[0090] Specifically, the trim strip body comprises a trim strip base plate 11 as the main body, and a frame plate 12 is provided on the side of the trim strip base plate 11 near the lower door guard plate 4. The frame plate 12 serves two purposes: firstly, it acts as a connecting plate, providing a mounting base for the aforementioned snap-fit ​​unit; secondly, it also acts as a reinforcing rib, significantly improving the overall structural strength of the trim strip body. The aforementioned snap-fit ​​strip 21 and guide hook 301 are both connected to the frame plate 12.

[0091] To improve assembly smoothness, an assembly guide slope is provided on the outer side of the end of the snap-fit ​​protrusion 213 away from the snap-fit ​​base 211. This assembly guide slope guides the snap-fit ​​protrusion 213 when it is inserted into the snap-fit ​​base plate 42, preventing the protrusion from directly hitting the edge of the snap-fit ​​base plate 42 and causing interference, thereby reducing insertion resistance.

[0092] An elastic mechanism is also provided on the latch strip 21, which is arranged on the side of the latch strip base 211 near the trim strip body. As a preferred implementation, the elastic mechanism can be an elastic arc plate 213. The two ends of the elastic arc plate 213 are connected to the latch strip base 211, while the middle area is spaced apart from the latch strip base 211, forming an arch-like structure. This design gives the elastic arc plate 213 good deformation capability and provides stable elastic force. When the latching mechanism 2 is inserted into the latch seat plate 42, the elastic arc plate 213 will press against a specific part of the latch seat plate 42. This not only eliminates the wobbling gap of the latch strip 21 in the latch seat plate 42, but also works in conjunction with the guide hook 301 mentioned later to ensure a tight fit between the lower door trim piece 1 and the lower door guard plate 4, avoiding abnormal noise.

[0093] Between the two symmetrically distributed latching strips 21, a connecting mechanism is provided. This connecting mechanism is specifically a stress-relieving band, with each end of the band connected to a latching strip 21. The design of the stress-relieving band is key to achieving the detachable function in this design. In the normal latching state, the stress-relieving band provides lateral support and reinforcement, connecting the two latching strips 21 and ensuring the structural stability of the latching strips 21 when they are engaged with the latching plate 42, preventing unexpected deformation or loosening. When it is necessary to remove the lower door trim 1, the operator can apply external force to the stress-relieving band using a specific tool or manually. The stress-relieving band will move or deform under force, causing the ends of the two latching strips 21 connected to it to move closer together. This action causes the latching protrusions 213 at the ends of the latching strips 21 to retract inward, thereby disengaging from the latching plate 42, unlocking the latching mechanism 2, allowing the entire lower door trim 1 to be easily removed without damaging the latches themselves, greatly improving the reusability of parts. To further optimize the performance of the unloading belt, multiple material reduction grooves can be set on its belt body. These grooves can not only reduce the weight of the parts and save materials, but also adjust the rigidity of the unloading belt to a certain extent, making it easier to produce the expected deformation when under stress.

[0094] The guide hook 301 includes a first hook block and a second hook block. The second hook block is connected to the frame plate 12 on the trim body via the first hook block, and its overall vertical cross-section is "L" shaped. Specifically, the first hook block is set perpendicular to the second hook block and also perpendicular to the extension direction of the latch strip 21, while the second hook block is set parallel to the latch strip 21. A pushing ramp is also specially provided on the second hook block. This pushing ramp is located on the side of the second hook block near the trim base plate 11, making the second hook block present a wedge-shaped structure. During installation, the second hook block first contacts the edge of the latch groove 43 on the lower door guard plate 4 through the pushing ramp. As the insertion goes deeper, the ramp gradually guides the guide hook 301 to the correct position. When the latching mechanism 2 is fully engaged with the latch plate 42, the second hook block has completely passed through the latch groove 43 and is located on the other side of the lower door guard plate 4, and its hook-shaped part is hooked on the lower guard plate body 41. At this time, due to the action of the inclined plane, the hooking process of the guide hook 301 will gradually squeeze the elastic mechanism, putting it in a continuous pressure state, thereby ensuring the tightness and stability of the entire connection system.

[0095] On the other hand, the present invention also provides a door lower guard plate 4 assembly including the aforementioned lower door trim piece 1. The assembly includes a door lower guard plate 4, and the lower guard plate is provided with a mounting unit 1-2 corresponding to the mounting unit on the trim piece.

[0096] The card holder unit 1-2 specifically includes a card holder plate 42 disposed on the lower guard plate body 41 and a card slot 43 formed on the lower guard plate. The structure of the card holder plate 42 is a frame with a vertical cross-section in the shape of a "[". It consists of an end connecting plate 421 and side connecting plates 422 connected to both ends of the end connecting plate 421. The other ends of the two side connecting plates 422 are connected to the lower guard plate body 41, thereby forming a transverse through groove structure on the lower guard plate body 41. This through groove is used to accommodate and engage the aforementioned engaging mechanism 2. The card slot 43 is a through hole formed on the lower guard plate body 41, used to avoid and guide the guide hook 301 through.

[0097] In the assembled state, the two latching strips 21 in the latching mechanism 2 respectively engage with the inner sides of the two side connecting plates 422 of the latching plate 42, while the elastic mechanism presses against the end connecting plate 421 of the latching plate 42. Simultaneously, the two guide hooks 301 pass through the corresponding two latching strip grooves 43, and their second latches hook onto the outer side of the lower guard plate body 41. To achieve precise fit, the shortest distance between the outer surfaces of the two side connecting plates 422 is designed to be equal to the shortest distance between the outer surfaces of the bases of the two latching strips 21, while the latching protrusions 213 serve as protrusion points to ensure secure hooking onto the side connecting plates 422.

[0098] The lower door trim piece 1 and assembly provided in this embodiment achieve tool-free rapid installation through the precise cooperation of the snap-fit ​​unit and the mounting unit 1-2. Its unique combination design of the snap-fit ​​strip 21, elastic arc plate 213, stress-relieving band, and guide hook 301 not only ensures stable and reliable connection and effectively absorbs tolerances, but more importantly, it enables non-destructive disassembly of components, significantly improving the product's assembly convenience, reliability, and maintenance economy.

[0099] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A lower door trim piece, characterized in that, Includes a trim strip body, which has a snap-fit ​​unit; the trim strip body can be connected to the lower door panel via the snap-fit ​​unit. The snap-fit ​​unit includes multiple snap-fit ​​structures; each snap-fit ​​structure includes a snap-fit ​​mechanism and / or a hanging mechanism disposed on the trim body; The snap-fit ​​mechanism includes two snap-fit ​​strips spaced apart on the trim body; The buckle strip includes a buckle strip base, and a buckle protrusion is provided at the end of the buckle strip base; The attachment mechanism includes guide hooks disposed on the trim body.

2. The lower door trim piece according to claim 1, characterized in that, The trim body includes a trim base plate, on which a frame plate is provided; the snap-fit ​​unit is connected to the frame plate.

3. The lower door trim piece according to claim 1, characterized in that, The buckle protrusion has an assembly guide slope at the end away from the buckle base.

4. A lower door trim piece according to claim 1, characterized in that, The buckle strip also includes an elastic mechanism disposed on the buckle strip base.

5. A lower door trim piece according to claim 4, characterized in that, The elastic mechanism includes an elastic arc plate disposed on the card strip base, with both ends of the elastic arc plate connected to the card strip base respectively, and the middle region of the elastic arc plate being spaced apart from the card strip base.

6. A lower door trim piece according to any one of claims 1-5, characterized in that, The two buckle strips are symmetrically distributed; a connecting mechanism is provided between the two buckle strips, the connecting mechanism including a stress relief belt, the two ends of which are respectively connected to a buckle strip.

7. A lower door trim piece according to claim 6, characterized in that, The unloading belt includes a belt body, on which multiple material reduction grooves are provided.

8. A lower door trim piece according to claim 1, characterized in that, The guide hook includes a first locking block and a second locking block. The second locking block is connected to the trim body through the first locking block. The guide hook has an L-shaped vertical cross-section. The second locking block is provided with a pushing slope.

9. A door lower guard plate assembly, characterized in that, The device includes a lower door trim panel, wherein the lower door trim panel is provided with a lower door trim piece as described in any one of claims 1-8, the lower door trim panel includes a lower trim panel body, the lower trim panel body is provided with a mounting unit, each mounting unit corresponding to one of the aforementioned snap-fit ​​units; the mounting unit includes a mounting plate disposed on the lower trim panel body and a snap-fit ​​groove disposed on the lower trim panel; the snap-fit ​​mechanism is connected to the mounting plate, and the guide hook is arranged through the snap-fit ​​groove and passes through the lower trim panel body; the second snap-fit ​​block in the guide hook is hooked onto the lower trim panel body.

10. A door lower guard plate assembly according to claim 9, characterized in that, The card holder plate includes an end connecting plate, and both ends of the end connecting plate are connected to the lower guard plate body through side connecting plates respectively; the vertical cross section of the card holder plate is U-shaped; each carding unit includes two spaced guide hooks; each card holder unit includes two spaced card slots; one guide hook corresponds to one card slot.

Images