Small door structure for vehicle

Abstract

The utility model belongs to the field of small doors for vehicles, and provides a small door structure for vehicles, which comprises a mounting seat, a locking rod, a driving disc and a flip cover component, the flip cover component is movably arranged in the mounting seat, and the flip cover component is provided with a cover plate which can be switched between an opening position and a closing position of the mounting seat; the locking rod is provided with a driving end and a locking end, the driving end comprises a guide part and an anti-falling part which are communicated with each other, and the driving disc is clamped to the anti-falling part and movably abuts against the guide part so as to drive the locking end to be separated out of the cover plate; and the driving disc is arranged on the mounting seat. Compared with the prior art, the locking device has the advantages that the driving disc abuts against the guide part to achieve stable driving of the locking rod, meanwhile, the relative position of the driving disc and the locking rod is guaranteed through clamping matching of the anti-disengaging column and the anti-disengaging part, the risk that parts are misplaced or even disengaged is effectively prevented, and the service life of the locking device is prolonged. And the unlocking precision is improved to ensure that the cover plate is normally opened and used, so that the use experience of a user is not influenced.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle small doors, specifically relating to a vehicle small door structure. Background Technology

[0002] With the rapid development of the modern automotive industry and the increasing demands of users for intelligent and comfortable vehicles, the design of automotive interior structures is no longer limited to the realization of basic functions, but is moving towards a more human-centered, automated, and integrated direction. Especially in the design of functional components with frequent human-machine interaction, such as small automotive door structures like the center console storage box cover, charging port cover, fuel filler cap, and air conditioning vent adjustment door, their ease of operation, locking reliability, and overall aesthetics have become important factors in measuring the overall quality of a vehicle.

[0003] Traditional automotive door mechanisms typically employ simple hinges with manual locking mechanisms, requiring users to manually press or rotate to open and close. While this design is cost-effective and technologically mature, it suffers from several drawbacks in practical use: First, users must manually unlock the door before opening it, a cumbersome process. Second, mechanical mechanisms often rely on a simple clamping action between a drive disc and a locking rod to unlock or lock the door. During this process, the movement of the locking rod is frequently affected by vehicle vibrations, wear and tear from prolonged use, and other external factors. This can lead to deviations or even jamming when the drive disc engages the locking rod, severely impacting the normal opening and closing of the door and diminishing the user experience. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a vehicle door structure that is simple in structure, has good stability, and ensures smooth unlocking and locking of the cover plate.

[0005] The objective of this utility model can be achieved through the following technical solution: a vehicle door structure is proposed, including a mounting base, a locking rod, a drive disc, and a flip-up assembly, wherein:

[0006] The flip-top assembly is movably disposed within the mounting base, and the flip-top assembly has a cover plate that can be switched between an open position and a closed position of the mounting base;

[0007] The locking rod has a driving end and a locking end. The driving end includes a guide part and an anti-disengagement part that are connected to each other. The driving disc is engaged with the anti-disengagement part and is movably pressed against the guide part to drive the locking end to disengage from the cover plate.

[0008] The drive disk is disposed on the mounting base, and the drive disk can drive the flip cover assembly to switch the cover plate between the open position and the closed position;

[0009] When the cover is in the closed position, the locking end passes through the mounting base and extends into the cover;

[0010] When the drive disc rotates and causes the locking end to disengage from the cover plate, the flip-top assembly can drive the cover plate to switch from the closed position to the open position due to the continued rotation of the drive disc.

[0011] In the above-mentioned vehicle door structure, the guide portion has an angled avoidance slope and an unlocking slope, the avoidance slope and the unlocking slope together form an avoidance groove, the drive disc has a drive arc surface, the drive arc surface can extend into the avoidance groove and move against the unlocking slope when the drive disc rotates.

[0012] In the above-mentioned vehicle door structure, a mounting post is formed on the drive end, and an elastic element with both ends respectively abutting against the mounting seat and the drive end is sleeved on the mounting post.

[0013] In the above-mentioned vehicle door structure, the drive disc is further provided with an anti-detachment post located at the end of the drive arc surface, and the anti-detachment post is movably engaged in the anti-detachment part.

[0014] In the above-mentioned vehicle door structure, a latch is formed by bending the locking end, an extension block is formed on the cover plate, a lock groove is provided in the extension block, and the latch passes through the mounting base and is movably inserted into the lock groove.

[0015] In the above-mentioned vehicle door structure, a limiting groove is also provided in the drive end, and a limiting block is provided on the mounting base, and the limiting groove and the limiting block are movably engaged.

[0016] In the aforementioned vehicle door structure, the locking rod also has a bent portion near its central position.

[0017] In the aforementioned vehicle door structure, the flip-up assembly further includes:

[0018] A flip rod is movably disposed within the mounting base, and the cover plate is connected to the end of the flip rod;

[0019] A drive shaft is connected to the end of the flipping rod away from the cover plate and is movably connected to the mounting base. The side wall of the drive disc is provided with a driving sector gear, and a driven sector gear is connected to the drive shaft. The driving sector gear and the driven sector gear are movably meshed.

[0020] In the above-mentioned vehicle door structure, a retention gap is formed on the driving sector gear, and a stop portion is formed on the driven sector gear. When the stop portion extends to the retention gap, the driving sector gear and the driven sector gear disengage.

[0021] In the above-mentioned vehicle door structure, a drive component is detachably connected to the mounting base, and the output end of the drive component is connected to the drive disk via a spline.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The vehicle door structure of this utility model achieves stable driving of the locking rod by pressing the drive disc against the guide part, and at the same time, the anti-disengagement column and the anti-disengagement part are engaged to ensure the relative position of the drive disc and the locking rod, effectively preventing the risk of misalignment or even falling off of the parts, improving the unlocking accuracy to ensure the normal opening and use of the cover, so that the user's experience is not affected.

[0024] (2) The design of the bending part effectively disperses the stress distribution of the locking rod during operation, reduces the overload of a single area, extends the service life of the parts, and improves the reliability and stability of the overall structure.

[0025] (3) The design of the retention gap and the stop part enables the active sector gear and the driven sector gear to automatically disengage at a specific angle. That is, under the drive of the same driving component, the sequential execution of the cover unlocking and cover opening actions is realized. The two do not interfere with each other, which improves the control accuracy and enhances the safety, stability and smoothness of the vehicle door operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a vehicle door structure according to this application;

[0027] Figure 2 This is a schematic diagram of the mounting structure of the drive disc and locking rod on the mounting base;

[0028] Figure 3 yes Figure 2 A schematic diagram of the installation structure of each component after removing the mounting base;

[0029] Figure 4 This is an exploded view of the area between the drive disc and the locking lever;

[0030] Figure 5 This is a schematic diagram of the structure of the driving sector gear and the driven sector gear.

[0031] In the figure, 1 is the mounting base; 10 is the driving component; 2 is the locking rod; 20 is the driving end; 200 is the guide part; 200a is the clearance slope; 200b is the unlocking slope; 200c is the clearance groove; 201 is the anti-detachment part; 202 is the mounting post; 203 is the elastic element; 204 is the limit groove; 21 is the locking end; 210 is the locking tongue; 22 is the bending part; 3 is the driving disc; 30 is the driving arc surface; 31 is the anti-detachment post; 32 is the driving sector gear; 320 is the retention gap; 4 is the flip-top assembly; 40 is the cover plate; 400 is the extension block; 400a is the locking groove; 41 is the flip rod; 42 is the drive shaft; 43 is the driven sector gear; and 430 is the stop part. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0034] like Figures 1 to 5 As shown, this utility model discloses a vehicle door structure, including a mounting base 1, a locking rod 2, a drive disc 3, and a flip-up assembly 4. The flip-up assembly 4 is movably disposed within the mounting base 1 and has a cover plate 40 that can be switched between an open and closed position on the mounting base 1. The locking rod 2 has a drive end 20 and a locking end 21. The drive end 20 includes a guide portion 200 and an anti-detachment portion 201 that are interconnected. The drive disc 3 is engaged with the anti-detachment portion 201 and movably abuts against the guide portion. Part 200 drives the locking end 21 to disengage from the cover plate 40; the drive disk 3 is mounted on the mounting base 1, and the drive disk 3 can drive the flip cover assembly 4 to switch the cover plate 40 between the open position and the closed position; when the cover plate 40 is in the closed position, the locking end 21 passes through the mounting base 1 and extends into the cover plate 40; when the drive disk 3 rotates and causes the locking end 21 to disengage from the cover plate 40, the flip cover assembly 4 can drive the cover plate 40 to switch from the closed position to the open position due to the continued rotation of the drive disk 3.

[0035] This embodiment implements the sequential execution of the unlocking and opening actions of the cover plate 40. Specifically, as follows: Figures 1 to 5 As shown, when not in use, the cover 40 is in the closed position within the mounting base 1 (see reference). Figure 1 (Structure shown), and the locking end 21 on the locking rod 2 extends into the cover plate 40 to achieve the locking function (see reference). Figure 3(Structure shown); when the user needs to open the cover 40, the vehicle control system or mechanical key controls the drive disc 3 along... Figure 2 Rotating clockwise will cause the locking lever 2 to move along... Figure 2 Moving to the right, the unlocking operation is completed when the cover plate 40 is disengaged at the locking end 21. During the rotation of the drive disc 3, in this embodiment, the drive disc 3 actively presses against the guide portion 200 on the drive end 20 to ensure accurate application of the locking rod 2 along its length. Figure 2 The unlocking force moving to the right, on the other hand, simultaneously utilizes the locking engagement between the drive disc 3 and the anti-disengagement part 201 to effectively ensure the position between the drive disc 3 and the drive end 20, so that the locking rod 2 can always move along the right side. Figure 2 A linear displacement to the right prevents the locking rod 2 from becoming misaligned or even falling off due to vehicle vibration, wear from prolonged use, or other external factors during movement. This improves unlocking accuracy and ensures the stability of the cover 40 during normal opening and use, guaranteeing an unaffected user experience. Once the rotation of the drive disc 3 disengages the locking end 21 from the cover 40 (thus completing the unlocking function of the cover 40), the drive disc 3 continues to move linearly to the right under the control of the aforementioned control system. Figure 2 Rotating clockwise causes the drive disc 3 to rotate relative to the mounting base 1, allowing the unlocked cover 40 to open smoothly without jamming. This demonstrates that the vehicle door structure achieves the separation and sequential execution of the unlocking and opening actions of the cover 40 under the same drive source (i.e., drive disc 3), with the two not interfering with each other, thus improving operational safety and service life.

[0036] The guide section 200 has an angled clearance slope 200a and an unlocking slope 200b. The clearance slope 200a and the unlocking slope 200b together form a clearance groove 200c. The drive disk 3 has a drive arc surface 30. The drive arc surface 30 can extend into the clearance groove 200c and move against the unlocking slope 200b when the drive disk 3 rotates.

[0037] like Figures 2 to 4 As shown, when the cover plate 40 is in Figure 1 When in the closed position as shown, the locking end 21 of the locking rod 2 is inserted into the cover plate 40, completing the locking action. At this time, the driving arc surface 30 of the driving disc 3 remains in contact with the guide portion 200 on the driving end 20. Figure 2 As shown in the relative positions, when it is necessary to unlock the cover 40, the drive disk 3 begins to move along... Figure 2As the drive disc 3 rotates clockwise, the drive arc surface 30 gradually approaches and extends into the clearance groove 200c. During this process, the design of the clearance slope 200a provides sufficient space for the drive arc surface 30 to press against the unlocking slope 200b, and provides a certain buffer area, reducing the possibility of direct collision between the drive arc surface 30 and the unlocking slope 200b. As the drive arc surface 30 transitions from the clearance slope 200a to the unlocking slope 200b and moves to press against the unlocking slope 200b, the drive arc surface 30 applies a force to the unlocking slope 200b, driving the locking rod 2 to move the locking end 21 outward (i.e., along...). Figure 3 (Move to the right) Once the locking end 21 is completely disengaged from the cover plate 40, the unlocking action is completed. Therefore, this embodiment, through the reasonable design of the cooperation relationship between the avoidance groove 200c and the driving arc surface 30, ensures that the locking rod 2 can move accurately along the predetermined trajectory during the unlocking process, avoiding mechanical failures caused by improper angles or excessive force, and improving the overall reliability and durability of the system.

[0038] The drive disk 3 is also provided with an anti-detachment post 31 located at the end of the drive arc surface 30, and the anti-detachment post 31 is movably engaged in the anti-detachment part 201.

[0039] Furthermore, such as Figure 2 , Figure 4 as well as Figure 5 As shown, in this embodiment, based on the aforementioned driving arc surface 30, clearance groove 200c, and unlocking inclined surface 200b, an anti-detachment post 31 is added to the side wall of the driving disk 3. Preferably, the anti-detachment post 31 is located at the end of the driving arc surface 30 near the driving end 20 (see reference). Figure 5 As shown in the diagram, this structure, while ensuring the driving arc surface 30 abuts against the unlocking arc surface to complete the unlocking operation of the locking rod 2, also utilizes the interlocking engagement between the anti-detachment post 31 and the anti-detachment part 201 (which is a groove-shaped structure) to effectively prevent accidental disengagement between the driving disc 3 and the locking rod 2 during operation. This is especially important when encountering vibrations and bumps during vehicle operation or when parts show wear after prolonged use, maintaining excellent connection stability. In other words, this structure adds an extra safety mechanism to the vehicle door structure, eliminating concerns about any abnormal situations during operation, reducing the probability of component wear and damage due to frequent operation or external factors, helping to extend the service life of the entire vehicle door structure, reducing maintenance costs, and also increasing user trust and satisfaction.

[0040] Preferably, such as Figure 5As shown, this embodiment also has a limiting groove 204 in the drive end 20 and a limiting block (not shown in the figure) on the mounting base 1. It is worth noting that one end of the limiting groove 204 faces the mounting base 1, which facilitates the assembly and disassembly between the locking rod 2 and the mounting base 1. The other end of the limiting groove 204 faces the unlocking direction of the locking rod 2. With the cooperation of the limiting groove 204 and the limiting block in a movable engagement, the movement direction of the locking rod 2 is further restricted, ensuring its precise position and posture during the unlocking and locking process, and improving the accuracy and consistency of the overall operation.

[0041] A locking tongue 210 is formed by bending on the locking end 21, and an extension block 400 is formed on the cover plate 40. A locking groove 400a is opened in the extension block 400, and the locking tongue 210 passes through the mounting base 1 and is movably inserted into the locking groove 400a.

[0042] like Figures 2 to 4 As shown, along drive disk 3 Figure 2 As the locking lever 2 moves to the right by rotating clockwise, the locking tongue 210, which was originally inserted into the extension block 400, gradually disengages from the lock groove 400a, so that the subsequent flipping component can drive the unlocked cover plate 40 to open. It should be noted that in this embodiment, a positioning hole (not shown in the figure) is also provided on the mounting base 1. The locking tongue 210 passes through the positioning hole and is movably inserted into the lock groove 400a. Therefore, the positioning hole guides and limits the reciprocating movement of the locking tongue 210, ensuring that the locking tongue 210 and the lock groove 400a can smoothly engage or disengage, improving the smoothness of the entire unlocking and locking process, and thus providing a better operating experience.

[0043] Preferably, such as Figure 3 and Figure 4 As shown, in this embodiment, the locking rod 2 also has a bent portion 22 near its central position. The design of this bent portion 22 effectively disperses the stress distribution of the locking rod 2 during operation, reduces overload in a single area, effectively improves the overall structural strength of the locking rod 2, extends the service life of components, and also helps to improve the reliability of the overall structure.

[0044] More preferably, such as Figure 2 As shown, in this embodiment, a mounting post 202 is also formed on the drive end 20, and an elastic element 203 with its two ends respectively abutting against the mounting base 1 and the drive end 20 is sleeved on the mounting post 202. When the cover plate 40 is switched from the open position to the closed position, the locking tongue 210 needs to be re-inserted into the locking groove 400a to complete the locking function of the cover plate 40. At this time, the drive disk 3 starts to rotate counterclockwise from the position after the locking tongue 210 is unlocked (not shown in the figure) to... Figure 2As shown in the diagram, during this process, the elastic element 203 is gradually compressed by the movement of the drive end 20 during the unlocking of the latch 210. Therefore, during the reset of the drive disc 3, the elasticity of the elastic element 203 releases the drive end 20 back. Figure 2 At the indicated position, the movement of the locking rod 2 causes the locking tongue 210 to re-insert into the lock groove 400a, completing the locking function of the cover plate 40. This process requires no additional reset mechanism or control system, simplifying the overall structure and improving the response speed and stability of the vehicle door structure. It should be noted that the elastic element 203 in this embodiment can be replaced by other elastic devices such as compression springs and return springs. Relying on this elastic element 203 to absorb part of the impact force during the unlocking process, the hard collision between mechanical parts is reduced, wear and noise are reduced, and the service life of the locking rod 2 and related transmission components is effectively extended.

[0045] The flip-top assembly 4 also includes: a flip rod 41, movably disposed within the mounting base 1, with the cover plate 40 connected to the end of the flip rod 41; a drive shaft 42, connected to the end of the flip rod 41 away from the cover plate 40 and movably connected to the mounting base 1; a driving sector gear 32 is provided on the side wall of the drive disk 3; a driven sector gear 43 is connected to the drive shaft 42, and the driving sector gear 32 and the driven sector gear 43 are movably meshed. A drive component 10 is detachably connected to the mounting base 1, and the output end of the drive component 10 is connected to the drive disk 3 via a spline.

[0046] like Figure 2 , Figure 3 as well as Figure 5 As shown, when the user triggers the start command, the drive unit 10 starts and drives the drive disk 3 to rotate. As the drive disk 3 moves along... Figure 2 After unlocking the cover plate 40 by rotating clockwise, as the drive disc 3 continues to rotate, the driving sector gear 32 on the drive disc 3 begins to gradually mesh with the driven sector gear 43 mounted on the drive shaft 42, thereby driving the drive shaft 42 to rotate around its axis and drive the flipping rod 41 along its axis. Figure 3 Rotating counterclockwise eventually causes the cover plate 40 to gradually move away from the mounting base 1, thus achieving the opening function (i.e., the opening position mentioned above, not shown in the figure). As can be seen, this embodiment relies on the meshing structure of the driving sector gear 32 and the driven sector gear 43 to accurately transmit the driving force, ensuring that the flipping rod 41 and the cover plate 40 rotate smoothly along the set trajectory, avoiding jamming or misalignment caused by transmission errors. Moreover, the sector gear design saves more space than the full circular gear, making it suitable for compact interior layouts (such as center console storage boxes, instrument panel side control doors, etc.), improving the overall integration. Furthermore, the gear transmission method has strong load-bearing capacity and vibration resistance, maintaining stable operation even under bumpy road conditions, thus improving the long-term reliability of the system.

[0047] A retention gap 320 is formed on the driving sector gear 32, and a stop portion 430 is formed on the driven sector gear 43. When the stop portion 430 extends to the retention gap 320, the driving sector gear 32 and the driven sector gear 43 disengage.

[0048] like Figure 2 and Figure 5 As shown, along drive disk 3 Figure 2 During the process of rotating clockwise to push the locking lever 2 to move (i.e.) Figure 5 The driving sector gear 32 rotates counterclockwise. Due to the presence of the retention gap 320, the driving sector gear 32, which rotates synchronously with the drive disc 3, will not mesh with the driven sector gear 43 at this time. After the locking tongue 210 completely disengages from the locking groove 400a, along the... Figure 5 The active sector gear 32, which continues to rotate counterclockwise, engages with the driven sector gear 43 (i.e., the stop 430 disengages from the retention gap 320). As the drive disc 3 continues to rotate, the rotation of the driven sector gear 43 causes the unlocked cover 40 to flip open. Therefore, in this embodiment, the cooperation design of the retention gap 320 and the stop 430 enables the active gear and the driven gear to automatically disengage at a specific angle, realizing the physical separation and sequential execution of the unlocking and opening actions, avoiding mutual interference between the two, and improving control accuracy.

[0049] It should be noted that the drive component 10 in this embodiment can be replaced by other drive devices such as stepper motors and servo motors. The drive component 10 can be quickly disassembled and reassembled using screws, bolts, and other components. In addition, the spline connection in this embodiment has higher load-bearing capacity and transmission accuracy than ordinary flat key or pin connection, which can effectively prevent slippage or misalignment. It is suitable for automotive door scenarios with frequent start-stop and high torque requirements.

[0050] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0052] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A vehicle door structure, characterized in that, Includes mounting base, locking lever, drive plate, and flip cover assembly, among which: The flip-top assembly is movably disposed within the mounting base, and the flip-top assembly has a cover plate that can be switched between an open position and a closed position of the mounting base; The locking rod has a driving end and a locking end. The driving end includes a guide part and an anti-disengagement part that are connected to each other. The driving disc is engaged with the anti-disengagement part and is movably pressed against the guide part to drive the locking end to disengage from the cover plate. The drive disk is disposed on the mounting base, and the drive disk can drive the flip cover assembly to switch the cover plate between the open position and the closed position; When the cover is in the closed position, the locking end passes through the mounting base and extends into the cover; When the drive disc rotates and causes the locking end to disengage from the cover plate, the flip-top assembly can drive the cover plate to switch from the closed position to the open position due to the continued rotation of the drive disc.

2. The door structure according to claim 1, wherein The guide portion has an angled avoidance slope and an unlocking slope, which together form an avoidance groove. The drive disk has a drive arc surface, which can extend into the avoidance groove and move against the unlocking slope when the drive disk rotates.

3. The door structure according to claim 1, wherein A mounting post is formed on the drive end, and an elastic element with its two ends respectively abutting against the mounting base and the drive end is sleeved on the mounting post.

4. The door structure according to claim 2, wherein The drive disk is also provided with an anti-detachment post located at the end of the drive arc surface, and the anti-detachment post is movably engaged in the anti-detachment part.

5. The door structure according to claim 1, wherein A locking tongue is formed by bending the locking end, an extension block is formed on the cover plate, a locking groove is opened in the extension block, and the locking tongue passes through the mounting base and is movably inserted into the locking groove.

6. The door structure according to claim 1, wherein The drive end is also provided with a limiting groove, and the mounting base is provided with a limiting block. The limiting groove and the limiting block are movably engaged.

7. The door structure according to claim 1, wherein The locking rod also has a bend near its central position.

8. The door structure according to claim 1, wherein The flip-top assembly also includes: A flip rod is movably disposed within the mounting base, and the cover plate is connected to the end of the flip rod; A drive shaft is connected to the end of the flipping rod away from the cover plate and is movably connected to the mounting base. The side wall of the drive disc is provided with a driving sector gear, and a driven sector gear is connected to the drive shaft. The driving sector gear and the driven sector gear are movably meshed.

9. The door structure according to claim 8, wherein A retention gap is formed on the driving sector gear, and a stop portion is formed on the driven sector gear. When the stop portion extends to the retention gap, the driving sector gear and the driven sector gear disengage.

10. The door structure according to claim 1, wherein A drive unit is detachably connected to the mounting base, and the output end of the drive unit is connected to the drive disk via a spline.

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