Lock body mechanism, automobile door and automobile

Abstract

The invention provides a lock body mechanism. The lock body mechanism comprises a motor; a first gear; when the motor drives the first gear to rotate in the first direction, the first gear drives the electric release rod; comprising an inhaul cable, and when the electric release rod is driven by the first gear, the electric release rod drives the transmission assembly; when the transmission assembly is driven by the electric release rod, the transmission assembly drives the unlocking rod, so that the unlocking rod drives the pawl, and the pawl rotates to release the ratchet wheel from being kept at the locking position; the electric release rod and the unlocking rod are coaxially arranged and rotate around a first shaft; the ratchet wheel, the pawl, the motor, the first gear, the electric release rod and the unlocking rod are all installed on the bottom plate, and the bottom plate is provided with a limiting structure used for limiting the ratchet wheel when the ratchet wheel crosses a preset stroke of a locking position; a back plate; and the pawl shaft is fixedly connected with the back plate and the bottom plate, and the pawl can rotate around the pawl shaft.

Description

Technical Field

[0001] The present disclosure relates to the technical field of lock bodies, and in particular to a lock body mechanism, a vehicle door, and a vehicle. Background Art

[0002] In a vehicle door lock system, the lock mechanism is the core component that enables the door to lock and unlock. Traditional lock mechanisms typically include a ratchet (also known as a deadbolt), a pawl, a motor, an electric release lever, and an unlocking lever.

[0003] In existing lock mechanisms, the electric release lever and the unlocking lever are usually arranged non-coaxially and linked through one or more intermediate transmission parts. This not only increases the complexity of the transmission path, but also easily introduces transmission errors, affecting the accuracy and response speed of the unlocking action.

[0004] Existing lock mechanisms lack an effective limiter mechanism for the ratchet's locked position. When a user forcefully closes a car door, the ratchet experiences a certain amount of "overtravel," meaning it travels a certain distance beyond the locked position. However, excessive overtravel can cause the locked state to become unstable, preventing the ratchet from returning to the locked position due to the ratchet return spring. This can easily lead to mechanical damage to the lock mechanism and misjudgment of its state.

[0005] The rotation fulcrum of the ratchet and pawl of the existing lock body mechanism is generally supported by only one side of the base plate, which lacks stability. During long-term use of the vehicle, problems such as pawl deflection and jamming are prone to occur, affecting the stability and durability of the locking performance. Summary of the Invention

[0006] According to one aspect of the present disclosure, a lock mechanism is provided, comprising a ratchet and a pawl, wherein the pawl is capable of holding the ratchet in a locked position, the lock mechanism comprising: Motor; First gear; an electric release lever, wherein when the motor drives the first gear to rotate in a first direction, the first gear drives the electric release lever; a transmission assembly including a cable, wherein the electric release lever drives the transmission assembly when the electric release lever is driven by the first gear; an unlocking lever, wherein when the transmission assembly is driven by the electric release lever, the transmission assembly drives the unlocking lever, causing the unlocking lever to drive the pawl, causing the pawl to rotate to release the ratchet from the locked position; the electric release lever and the unlocking lever are coaxially arranged and both rotate around a first axis; A base plate, wherein the ratchet, pawl, motor, first gear, electric release lever and unlocking lever are all mounted on the base plate, and the base plate has a limiting structure for limiting the ratchet when the ratchet exceeds a preset stroke of the locking position; Back panel; A pawl shaft is fixedly connected to the back plate and the bottom plate respectively, and the pawl can rotate around the pawl shaft.

[0007] According to the lock body mechanism of at least one embodiment of the present disclosure, the limiting structure includes an opening portion and a blocking portion. When the ratchet moves to the locked position, it is embedded in the opening portion and protrudes from the opening portion, and the blocking portion blocks the ratchet to limit the ratchet.

[0008] According to the lock body mechanism of at least one embodiment of the present disclosure, the bottom plate includes a first plate portion and a second plate portion, the first plate portion and the second plate portion are an integral structure or a split structure, and the second plate portion is bent.

[0009] According to the lock body mechanism of at least one embodiment of the present disclosure, the motor and the first gear are installed on the first plate portion, the electric release lever, the unlocking lever, the ratchet and the pawl are installed on the second plate portion, and the limiting structure is formed at a first edge position of the second plate portion, and the first edge position is away from the first plate portion.

[0010] According to the lock body mechanism of at least one embodiment of the present disclosure, a first flanging section and a second flanging section are formed at the first edge position, the opening portion is formed between the first flanging section and the second flanging section, and the first flanging section serves as the blocking portion.

[0011] According to the lock body mechanism of at least one embodiment of the present disclosure, the first gear is a sector gear, a first end of the sector gear forms a first driving feature, and the sector gear drives the electric release lever via the first driving feature.

[0012] According to the lock body mechanism of at least one embodiment of the present disclosure, the gear axis about which the first gear rotates is parallel to the first axis.

[0013] According to the lock body mechanism of at least one embodiment of the present disclosure, an electric release rod pin is installed on the electric release rod, the first gear drives the electric release rod by driving the electric release rod pin, and the electric release rod pin is parallel to the first axis.

[0014] According to at least one embodiment of the lock mechanism of the present disclosure, the transmission assembly includes: an electric release lever cable, wherein a first end of the electric release lever cable is connected to the electric release lever, and a second end of the electric release lever cable is connected to a first end of a transfer mechanism outside the lock body mechanism; an unlocking rod cable, wherein a first end of the unlocking rod cable is connected to the unlocking rod, and a second end of the unlocking rod cable is connected to a second end of the transfer mechanism; When the electric release rod cable is pulled by the electric release rod, the electric release rod cable pulls the transfer mechanism to rotate, so that the transfer mechanism pulls the unlocking rod cable via its second end, so that the unlocking rod cable pulls the unlocking rod, thereby causing the unlocking rod to drive the pawl.

[0015] According to at least one embodiment of the present disclosure, the lock mechanism further includes: A ratchet shaft is fixedly connected to the back plate and the bottom plate respectively, and the ratchet can rotate around the ratchet shaft.

[0016] According to another aspect of the present disclosure, a vehicle door is provided, comprising the lock mechanism according to any one of the embodiments of the present disclosure.

[0017] According to yet another aspect of the present disclosure, a vehicle is provided, comprising the vehicle door according to any one of the embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0019] Figure 1 It is a schematic diagram of the overall structure of a lock body mechanism according to an embodiment of the present disclosure.

[0020] Figure 2 and Figure 3 The structural schematic diagrams of the motor according to one embodiment of the present disclosure are shown from the front and back respectively.

[0021] Figure 4 It shows that a preset overtravel is generated when the ratchet of the lock body mechanism of the present invention moves to the locking position.

[0022] Figure 5 A schematic structural diagram is shown when the ratchet of the lock mechanism of the present disclosure is in a locked position.

[0023] Figure 6 It is a structural schematic diagram of a lock body mechanism of an embodiment of the present disclosure with the motor removed.

[0024] Figure 7It is a schematic structural diagram of a base plate according to an embodiment of the present disclosure.

[0025] Figure 8 It is a schematic diagram of the partial structure of the base plate of one embodiment of the present disclosure.

[0026] Figure 9 It is a partial structural diagram of a lock body mechanism according to an embodiment of the present disclosure.

[0027] Figure 10 It is a partial structural diagram of a lock body mechanism according to an embodiment of the present disclosure.

[0028] Figure 11 and Figure 12 A schematic diagram illustrating the coordination of an electric release lever cable, an unlocking lever cable, and a transfer mechanism outside the lock body mechanism according to an embodiment of the present disclosure is shown.

[0029] Figure 13 A schematic diagram showing the cooperation between the electric release lever cable, the unlocking lever cable, the electric release lever, the unlocking lever and the pawl is shown.

[0030] Figure 14 A partial structural schematic diagram of a lock body mechanism in an unlocked state according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0031] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the relevant content and are not intended to limit the present disclosure. It should also be noted that, for ease of description, only the portions relevant to the present disclosure are shown in the accompanying drawings.

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure can be combined with each other. The technical solution of the present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] Unless otherwise stated, the exemplary embodiments / examples shown are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of the various embodiments / examples may be further combined, separated, interchanged, and / or rearranged without departing from the technical concepts of the present disclosure.

[0034] The use of cross hatching and / or shading in the accompanying drawings is generally used to make the boundaries between adjacent components clear. As such, unless otherwise indicated, the presence or absence of cross hatching or shading does not convey or indicate any preference or requirement for the specific materials, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. In addition, in the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two successively described processes can be performed substantially simultaneously or in an order opposite to the order described. In addition, the same figure numbers represent the same components.

[0035] When a component is referred to as being “on,” “over,” “connected to,” or “coupled to” another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another component, there are no intervening components present. For this purpose, the term “connected” may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0036] For descriptive purposes, the present disclosure may use spatially relative terms such as "below," "beneath," "under," "down," "above," "upper," "above," "higher," and "side (e.g., in a "sidewall")," to describe the relationship of one component to another (other) component as shown in the accompanying drawings. The spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device in the drawings is turned over, a component described as "below" or "beneath" another component or feature would then be positioned "above" the other component or feature. Thus, the exemplary term "below" can encompass both the "above" and "below" orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and as such, the spatially relative descriptors used herein should be interpreted accordingly.

[0037] The terms used herein are for the purpose of describing specific embodiments and are not intended to be restrictive. As used herein, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, the features, integral bodies, steps, operations, parts, assemblies and / or their groups stated are explained, but the presence or addition of one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups is not excluded. It should also be noted that, as used herein, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values and / or the values provided that will be recognized by those of ordinary skill in the art.

[0038] Figure 1 It is a schematic diagram of the overall structure of a lock body mechanism according to an embodiment of the present disclosure.

[0039] refer to Figure 1 The lock mechanism of the present disclosure includes a ratchet 800 and a pawl 700. The pawl 700 can keep the ratchet 800 in the locked position. The lock mechanism also includes: Motor 100; First gear 200; The electric release lever 300, when the motor 100 drives the first gear 200 along the first direction ( Figure 1 When the first gear 200 rotates in the counterclockwise direction, the first gear 200 drives the electric release lever 300; a transmission assembly including a cable (preferably consisting of two cables described below), wherein the electric release lever 300 drives the transmission assembly when the electric release lever 300 is driven by the first gear 200; Unlocking rod 600, when the transmission assembly is driven by the electric release rod 300, the transmission assembly drives the unlocking rod 600, so that the unlocking rod 600 drives the pawl 700, so that the pawl 700 rotates to release the ratchet 800 from the locked position; the electric release rod 300 and the unlocking rod 600 are coaxially arranged and both rotate around the first axis 1100.

[0040] Preferably, the lock mechanism further includes a base plate 900 , and the ratchet 800 , the pawl 700 , the motor 100 , the first gear 200 , the electric release lever 300 and the unlocking lever 600 are all mounted on the base plate 900 .

[0041] Preferably, the base plate 900 of the present disclosure has a limiting structure 930 for limiting the ratchet 800 when the ratchet 800 exceeds a preset stroke of the locking position, thereby preventing the ratchet 800 from generating unnecessary "overstroke".

[0042] Continue to refer Figure 1 Preferably, the lock body mechanism of the present disclosure further includes a back plate 1200 and a pawl shaft 1000, the two ends of the pawl shaft 1000 are fixedly connected to the back plate 1200 and the bottom plate 900 respectively, and the pawl 700 can rotate around the pawl shaft 1000 (the pawl shaft 1000 can be a rivet, for example).

[0043] Among them, the pawl 700 and the ratchet 800 (i.e., the lock tongue) cooperate to perform the locking function, which belongs to the existing technology. Please refer to the applicant's multiple prior patents and will not be repeated in this disclosure.

[0044] Figure 2 and Figure 3 The structural schematic diagrams of the motor 100 according to one embodiment of the present disclosure are shown from the front and back respectively.

[0045] refer to Figure 2 and Figure 3 Preferably, the motor 100 of the present disclosure includes a motor body 110 and a gear mechanism 120 , and the gear mechanism 120 preferably includes a rotation output gear 121 , which can cooperate with the first gear 200 to drive the first gear 200 .

[0046] The gear mechanism 120 may further include a rotation receiving gear (or a rotation receiving worm gear) not shown, and the output shaft (which may be in the form of a worm) of the motor body 110 cooperates with the rotation receiving gear to drive the rotation receiving gear.

[0047] The rotation receiving gear and the rotation output gear 121 rotate coaxially, and the two can constitute a reduction gear set (which belongs to the prior art, and reference can be made to the applicant's prior patent application), which will not be described in detail.

[0048] Figure 4 A schematic diagram shows that the ratchet of the lock mechanism of the present invention generates a preset overtravel (i.e., exceeds the preset travel of the locking position, i.e., overtravel within the allowable range) when it moves to the upper locking position. In this state, the pawl 700 and the ratchet 800 are not yet engaged.

[0049] Figure 5 A schematic structural diagram of the lock mechanism of the present invention is shown when the ratchet is in a locked position. In this state, the pawl is engaged with the ratchet.

[0050] Under the action of the reset force of the reset spring of the ratchet, the ratchet 800 is Figure 4 The status shown returns to Figure 5 Status shown.

[0051] The lock body mechanism disclosed herein reduces unnecessary transmission errors, improves linkage efficiency, saves layout space, and reduces unnecessary motion interference by arranging the electric release lever and the unlocking lever to be coaxial.

[0052] The lock body mechanism of the present disclosure can effectively prevent the ratchet from generating redundant (or excessive) "overtravel" during the locking process by designing a limiting structure on the bottom plate, thereby ensuring the stability and safety of the lock body state.

[0053] The lock body mechanism disclosed herein improves the stability of the pawl rotation fulcrum by fixedly connecting the pawl shaft to the base plate and the back plate, thereby reducing the risk of jamming and deflection during long-term use.

[0054] Figure 6 1 is a schematic structural diagram of a lock body mechanism according to an embodiment of the present disclosure, with the motor 100 removed.

[0055] Figure 7 It is a schematic structural diagram of a base plate according to an embodiment of the present disclosure.

[0056] Figure 8 It is a schematic diagram of the partial structure of the base plate of one embodiment of the present disclosure.

[0057] refer to Figure 6 、 Figure 7 and Figure 8 Preferably, the limiting structure 930 disclosed herein includes an opening portion 933 and a blocking portion 931. When the ratchet 800 moves to the locked position, it is embedded in the opening portion 933 and protrudes from the opening portion 933, and the blocking portion 931 blocks the ratchet 800 to limit the ratchet 800.

[0058] Among them, the ratchet 800 may include two ratchet arms, the first ratchet arm 810 is used to cooperate with the pawl 700, and a fishmouth opening is formed between the two ratchet arms, and the fishmouth opening is used to cooperate with the lock buckle (not shown). When the user closes the door, the ratchet 800 moves from the unlocking position to the locking position, and the movement stroke of the second ratchet arm 820 is limited by the limiting structure 930, thereby preventing the ratchet 800 from generating "overtravel".

[0059] Figures 6 to 8 The limiting structure 930 is the preferred structure of the present disclosure. Structural adjustments made to the limiting mechanism 930 by those skilled in the art based on the technical solution of the present disclosure fall within the protection scope of the present disclosure.

[0060] Continue to refer Figures 6 to 8 In a preferred embodiment of the present disclosure, the bottom plate 900 includes a first plate portion 910 and a second plate portion 920 . The first plate portion 910 and the second plate portion 920 are an integral structure or a split structure, and the second plate portion 920 is a bent shape.

[0061] In some embodiments of the present disclosure, reference Figure 1 and Figure 6The motor 100 and the first gear 200 can be installed on the first plate portion 910, the electric release lever 300, the unlocking lever 600, the ratchet 800 and the pawl 700 are installed on the second plate portion 920, and the limiting structure 930 is formed at the first edge position of the second plate portion 920, and the first edge position is away from the first plate portion 910.

[0062] In light of the technical solution disclosed herein, adjustments made by those skilled in the art to the configuration and layout of the above-mentioned components on the first plate portion and the second plate portion fall within the scope of protection of the present disclosure.

[0063] Through the above-mentioned structural design, the limiting structure 930 is formed on an edge of the base plate 900, especially on the side edge of the second plate portion 920 away from the first plate portion 910, which can effectively intercept the over-travel action of the ratchet 800 during the locking process, thereby improving the timeliness and reliability of the limiting response. At the same time, this layout method is conducive to reducing the interference of the limiting structure on the movement of other components.

[0064] Continue to refer Figure 8 Preferably, the first edge position described above is formed with a first flanging section 931 and a second flanging section 932 , an opening portion 933 is formed between the first flanging section 931 and the second flanging section 932 , and the first flanging section 931 serves as a blocking portion 931 .

[0065] The second flange section 932 does not interfere with the movement of the ratchet 800 .

[0066] The following describes how the first gear 200 and the electric release lever 300 cooperate with each other.

[0067] Figure 9 It is a partial structural diagram of a lock body mechanism according to an embodiment of the present disclosure.

[0068] refer to Figure 9 The first gear 200 of the present disclosure is preferably a sector gear, and the first end of the sector gear forms a first driving feature 201 , and the sector gear drives the electric release lever 300 through the first driving feature 201 .

[0069] The gear shaft (not shown, which may be in the form of a rivet) around which the first gear 200 rotates is parallel to the first shaft 1100 described above.

[0070] The present disclosure also provides a structural design for the first gear 200, referring to Figure 9 The first gear 200 includes an integrally formed gear rod 220 and a tooth portion 210. The gear rod 220 can be sleeved on the gear shaft described above. The tooth portion 210 and the gear rod 220 form a concave area on the side away from the electric release lever 300, thereby reducing the interference of the first gear with other components during movement.

[0071] refer to Figure 9 Preferably, the first driving feature 201 described above is formed at an end of the tooth portion 210 close to the electric release lever 300 .

[0072] Continue to refer Figure 9 Preferably, an electric release rod pin 310 is installed on the electric release rod 300, and the first gear 200 drives the electric release rod 300 by driving the electric release rod pin 310. The electric release rod pin 310 is parallel to the first axis 1100 described above and has a preset distance with the first axis 1100, so that the first gear 200 can push the electric release rod 300 to rotate by pushing the electric release rod pin 310.

[0073] The transmission assembly including the cable of the present disclosure is described below.

[0074] Figure 10 It is a partial structural diagram of a lock body mechanism according to an embodiment of the present disclosure.

[0075] refer to Figure 10 Preferably, the transmission assembly of the present disclosure includes: The electric release lever cable 400 has a first end connected to the electric release lever 300 and a second end connected to a transfer mechanism outside the lock body mechanism ( Figure 10 a first end (not shown); The unlocking lever cable 500 has a first end connected to the unlocking lever 600 and a second end connected to the transfer mechanism ( Figure 10 a second end thereof (not shown).

[0076] Figure 11 and Figure 12 A schematic diagram shows the cooperation between the electric release lever cable 400, the unlocking lever cable 500 and the transfer mechanism 2000 outside the lock body mechanism (for example, a rod rotating around a fixed axis) according to an embodiment of the present disclosure.

[0077] Figure 13 A schematic diagram of the cooperation between the electric release lever cable 400, the unlocking lever cable 500, the electric release lever, the unlocking lever and the pawl is shown.

[0078] Figure 14 A partial structural schematic diagram of a lock body mechanism in an unlocked state (ratchet in unlocked position) according to an embodiment of the present disclosure is shown.

[0079] refer to Figures 11 to 12When the electric release lever cable 400 is pulled by the electric release lever 300, the electric release lever cable 400 pulls the transfer mechanism 2000 to rotate, so that the transfer mechanism 2000 is rotated via its second end ( Figure 11 The upper end of the unlocking lever cable 500 is pulled, so that the unlocking lever cable 500 pulls the unlocking lever 600, thereby driving the unlocking lever 600 to drive the pawl 700 (reference Figure 6 ), the transfer agency 2000 by Figure 11 Shown state action to Figure 12 Status shown.

[0080] refer to Figure 13 and Figure 14 , the lock body mechanism is Figure 13 In the state shown, the unlocking rod cable 500 begins to pull the unlocking rod 600 to rotate, and the driving end 601 of the unlocking rod 600 begins to drive the driven end 701 of the pawl 700.

[0081] The pulled end 602 of the unlocking lever 600 and the driving end 601 of the unlocking lever 600 are respectively located on both sides of the first shaft 1100 described above.

[0082] refer to Figure 10 In a preferred embodiment of the present disclosure, the pulled end 320 of the electric release lever 300 and the electric release lever pin 310 are located on the same side of the first shaft 1100 described above.

[0083] The electric release lever, unlocking lever, pawl, and ratchet disclosed in the present invention can all be reset based on their respective reset springs, and all belong to the prior art and will not be described in detail.

[0084] Preferably, the lock mechanism of the present disclosure may further include a ratchet shaft (not shown), which is fixedly connected to the back plate 1200 and the bottom plate 900 respectively, and the ratchet 800 can rotate around the ratchet shaft (eg, a rivet).

[0085] Based on the lock body mechanism provided by the present disclosure, the present disclosure further provides a vehicle door, comprising the lock body mechanism of any embodiment of the present disclosure.

[0086] The present disclosure also provides a car, comprising the above-mentioned car door of the present disclosure.

[0087] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0088] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0089] Those skilled in the art will appreciate that the above embodiments are merely intended to clearly illustrate the present disclosure and are not intended to limit the scope of the present disclosure. Other changes or modifications may be made based on the above disclosure, and such changes or modifications are still within the scope of the present disclosure.

Claims

1. A lock mechanism comprising a ratchet and a pawl, wherein the pawl is capable of holding the ratchet in a locked position, wherein: The lock body mechanism comprises: Motor; First gear; an electric release lever, wherein when the motor drives the first gear to rotate in a first direction, the first gear drives the electric release lever; a transmission assembly including a cable, wherein the electric release lever drives the transmission assembly when the electric release lever is driven by the first gear; an unlocking lever, wherein when the transmission assembly is driven by the electric release lever, the transmission assembly drives the unlocking lever, causing the unlocking lever to drive the pawl, causing the pawl to rotate to release the ratchet from the locked position; the electric release lever and the unlocking lever are coaxially arranged and both rotate around a first axis; A base plate, wherein the ratchet, pawl, motor, first gear, electric release lever and unlocking lever are all mounted on the base plate, and the base plate has a limiting structure for limiting the ratchet when the ratchet exceeds a preset stroke of the locking position; back panel; and A pawl shaft is fixedly connected to the back plate and the bottom plate respectively, and the pawl can rotate around the pawl shaft.

2. The lock mechanism according to claim 1, wherein: The limiting structure includes an opening portion and a blocking portion. When the ratchet moves to the locked position, it is embedded in the opening portion and protrudes from the opening portion. The blocking portion blocks the ratchet to limit the ratchet.

3. The lock mechanism according to claim 2, characterized in that: The bottom plate includes a first plate portion and a second plate portion, the first plate portion and the second plate portion are an integral structure or a split structure, and the second plate portion is a bent shape.

4. The lock mechanism according to claim 3, wherein: The motor and the first gear are installed on the first plate portion, the electric release lever, the unlocking lever, the ratchet and the pawl are installed on the second plate portion, and the limiting structure is formed at a first edge position of the second plate portion, and the first edge position is away from the first plate portion.

5. The lock mechanism according to claim 4, characterized in that: A first flanging section and a second flanging section are formed at the first edge position, an opening is formed between the first flanging section and the second flanging section, and the first flanging section serves as the blocking portion.

6. The lock mechanism according to claim 4, characterized in that: The first gear is a sector gear, a first end of the sector gear forms a first driving feature, and the sector gear drives the electric release lever through the first driving feature.

7. The lock mechanism according to claim 6, wherein: The gear axis about which the first gear rotates is parallel to the first axis.

8. The lock mechanism according to any one of claims 1 to 7, characterized in that: An electric release rod pin is mounted on the electric release rod, the first gear drives the electric release rod by driving the electric release rod pin, and the electric release rod pin is parallel to the first axis; Optionally, the transmission assembly includes: an electric release lever cable, wherein a first end of the electric release lever cable is connected to the electric release lever, and a second end of the electric release lever cable is connected to a first end of a transfer mechanism outside the lock body mechanism; and an unlocking rod cable, wherein a first end of the unlocking rod cable is connected to the unlocking rod, and a second end of the unlocking rod cable is connected to a second end of the transfer mechanism; When the electric release lever cable is pulled by the electric release lever, the electric release lever cable pulls the transfer mechanism to rotate, so that the transfer mechanism pulls the unlocking lever cable via its second end, so that the unlocking lever cable pulls the unlocking lever, thereby causing the unlocking lever to drive the pawl; Optionally, the lock body mechanism further includes: A ratchet shaft is fixedly connected to the back plate and the bottom plate respectively, and the ratchet can rotate around the ratchet shaft.

9. A vehicle door, characterized in that: The invention comprises the lock body mechanism according to any one of claims 1 to 8.

10. An automobile, characterized in that: Including the vehicle door according to claim 9.

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