Guide rail base

Abstract

The invention relates to a guide rail base which comprises a base body, a supporting assembly, an elastic piece and a retainer, and the base body comprises a bottom plate and a side plate arranged on the bottom plate. The supporting assembly and the bottom plate are arranged at an interval and used for supporting the guide rail. The elastic piece is arranged between the bottom plate and the supporting assembly. The retainer is movably arranged on the side plate and matched with the supporting assembly, the retainer has an unlocking state and a locking state, in the locking state, the retainer can limit the supporting assembly to move towards one side close to the bottom plate, and in the unlocking state, the retainer can unlock the supporting assembly; when the speed of the supporting assembly moving towards the side close to the bottom plate reaches a speed threshold value, the retainer can be switched from the unlocking state to the locking state. According to the guide rail base, the height can be self-adaptively adjusted according to the gliding distance of the guide rail when the guide rail works normally, so that the manpower maintenance cost is saved; and the guide rail can be effectively supported when the guide rail rapidly slides down due to abnormity, so that the sliding distance of the guide rail is prevented from being too large.

Description

Technical Field

[0001] This application relates to the field of elevator technology, and in particular to a guide rail base. Background Technology

[0002] After a building is constructed, it will experience some shrinkage and settlement during its initial use. As a component installed on the building shaft wall, the elevator guide rail will also descend during this period. Generally, to prevent the guide rail from bending due to building shrinkage and settlement, the guide rail base needs to be configured with a height-adjustable structure, allowing the guide rail to slide a certain distance to one side without bending. Simultaneously, the guide rail base also needs to support the guide rail when it is clamped by the safety clamp and descends rapidly, preventing excessive descent.

[0003] In some related technologies, the guide rail base consists of bolts, support plates, and shims. When the guide rail descends due to building shrinkage, the height of the guide rail base is adjusted by changing the height of the support plates or removing part of the shims. Therefore, maintenance personnel are required to regularly inspect and adjust the height of the guide rail base, resulting in high labor costs. Summary of the Invention

[0004] Therefore, it is necessary to provide a guide rail base that can not only adaptively adjust the height when the building shrinks and settles, but also support the guide rail when it is clamped by a safety clamp and descends rapidly. This guide rail base can effectively save labor costs.

[0005] A guide rail base, comprising:

[0006] The base body includes a base plate and side plates disposed on the base plate;

[0007] A support assembly is provided at a distance from the base plate and is used to support the guide rail;

[0008] An elastic element is disposed between the base plate and the support assembly;

[0009] A stop is movably disposed on the side plate and cooperates with the support assembly. The stop has an unlocked state and a locked state. In the locked state, the stop can restrict the support assembly from moving towards the side of the base plate. In the unlocked state, the stop can release the lock on the support assembly. When the speed at which the support assembly moves towards the side of the base plate reaches a speed threshold, the stop can switch from the unlocked state to the locked state.

[0010] The technical solution will be further explained below:

[0011] In one embodiment, the stop includes a latching portion and a driving portion connected together. In the locked state, the latching portion engages with the support component to restrict the movement of the support component towards the side closer to the base plate. In the unlocked state, the latching portion releases its engagement with the support component, and the driving portion can engage with the support component. When the speed at which the support rod moves towards the side closer to the base plate reaches a speed threshold, the driving portion can drive the stop from the unlocked state to the locked state under the action of the support component.

[0012] In one embodiment, the stop is rotatably mounted on the side plate via a pivot located between the latching portion and the driving portion. The weight of the latching portion is greater than the weight of the driving portion, and the stop can be maintained in the unlocked state under the action of gravity.

[0013] In one embodiment, the support assembly includes a support plate and a support rod. The support plate is disposed opposite to the base plate and is used to support the guide rail. The support rod is located on the side of the support plate facing the base plate, and the end of the support rod away from the support plate is connected to the elastic member. The support rod has a mating part. In the unlocked state, the mating part can contact and engage with the driving part. In the locked state, the locking part engages with the mating part. When the speed at which the support rod moves towards the base plate reaches a speed threshold, the mating part engages with the driving part to drive the stop member to rotate from the unlocked state to the locked state.

[0014] In one embodiment, the mating part includes a plurality of locking teeth arranged sequentially along the extension direction of the support rod. In the locked state, the engaging part can restrict the support rod from moving towards the side closer to the base plate by engaging with one of the locking teeth. In the unlocked state, the driving part can engage with one of the locking teeth.

[0015] In one embodiment, the locking tooth has a first surface facing the base plate, and the engaging portion has a second surface. In the locked state, the second surface can abut against the first surface of the locking tooth engaging the engaging portion, and the first surface and the second surface are in contact.

[0016] And / or, the locking part and the driving part are rod-shaped structures, the stop is rotatably disposed on the side plate via a rotating shaft, the rotating shaft is located between the locking part and the driving part, the minimum distance from the surface of the rotating shaft to the root of the locking tooth is a first distance, the length of the locking part is greater than the first distance, and the length of the driving part is less than the first distance.

[0017] In one embodiment, the snap-fit ​​portion is provided with a magnetic element, which, in the locked state, is magnetically attracted to the support component.

[0018] In one embodiment, the snap-fit ​​portion and the drive portion are respectively disposed on both sides of the rotating shaft.

[0019] In one embodiment, there are multiple side plates, which are arranged circumferentially along the base plate and connected in sequence. The base plate and the multiple side plates together form a base cavity, and the elastic member and the stop member are both disposed in the base cavity.

[0020] In one embodiment, the number of stops is two, and the two stops are arranged circumferentially spaced along the base plate.

[0021] In the aforementioned guide rail base, an elastic element connects the base plate and the support assembly. This allows the support assembly to move closer to the base plate when subjected to downward pressure from the guide rail, compressing the elastic element and thus adaptively adjusting the distance between the guide rail and the base plate. Consequently, the height of the guide rail base can be adaptively adjusted. Specifically, when the guide rail slowly moves towards the base plate due to building shrinkage and settlement, the descent speed is less than a speed threshold, allowing the stop to remain unlocked. This ensures the guide rail base can always adaptively adjust its height, preventing the guide rail from bending due to building shrinkage and settlement. When the guide rail descends rapidly due to being clamped by a safety clamp, the speed at which the support assembly moves towards the base plate exceeds the speed threshold. This causes the stop to switch from the unlocked state to the locked state, restricting the support assembly's movement towards the base plate and securing it. This, in turn, allows the support assembly to support the guide rail, preventing further descent and achieving a safety protection function. Therefore... This guide rail base can not only adaptively adjust its height according to the guide rail's sliding distance when the guide rail is working normally, thus saving manpower maintenance costs; it can also effectively support the guide rail when it slides down rapidly due to abnormalities, preventing the guide rail from sliding too far and ensuring the safety of the equipment. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0025] Figure 1 This is a cross-sectional view of the guide rail base in one embodiment of this application.

[0026] Figure 2 This is a cross-sectional view of the guide rail base in the unlocked state according to one embodiment of this application.

[0027] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the structure in the locked state.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Guide rail base; 200. Guide rail; 10. Support assembly; 1. Support plate; 2. Support rod; 21. Mating part; 21a. Locking tooth; 3. Base body; 31. Side plate; 32. Base plate; 3a. Base cavity; 4. Stop; 41. Drive part; 42. Rotating shaft; 43. Snap-fit ​​part; 44. Magnetic part; 5. Elastic part. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0036] See Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of this application provides a guide rail base 100, including a base body 3, a support assembly 10, an elastic member 5, and a stop member 4, wherein:

[0037] Combination Figures 1 to 3 As shown, the base body 3 includes a base plate 32 and a side plate 31 disposed on the base plate 32. A support assembly 10 is spaced apart from the base plate 32 and is used to support the guide rail 200. An elastic member 5 is disposed between the base plate 32 and the support assembly 10. A stop member 4 is movably disposed on the side plate 31 and cooperates with the support assembly 10. The stop member 4 has an unlocked state and a locked state. In the locked state, the stop member 4 can restrict the support assembly 10 from moving towards the side closer to the base plate 32. In the unlocked state, the stop member 4 can release the lock on the support assembly 10. When the speed at which the support assembly 10 moves towards the side closer to the base plate 32 reaches a speed threshold, the stop member 4 can switch from the unlocked state to the locked state.

[0038] In the aforementioned guide rail base 100, the elastic element 5 is connected between the base plate 32 and the support assembly 10. This allows the support assembly 10 to move closer to the base plate 32 when subjected to a downward pressure force from the guide rail 200, compressing the elastic element 5. This adaptively adjusts the distance between the guide rail 200 and the base plate 32, thereby enabling the height of the guide rail base 100 to be adjusted adaptively. When the guide rail 200 slowly moves towards the base plate 32 due to building shrinkage and settlement, the stopping element 4 remains unlocked because the descent speed of the guide rail 200 is less than a speed threshold. This ensures that the guide rail base 100 can always adaptively adjust its height, preventing the guide rail 200 from being bent due to building shrinkage and settlement. When the guide rail 200 descends rapidly due to being clamped by the safety clamp, the support component 10 moves towards the base plate 32 at a speed exceeding a speed threshold. This causes the stop 4 to switch from the unlocked state to the locked state, restricting the movement of the support component 10 towards the base plate 32 and fixing it in place. This allows the support component 10 to support the guide rail 200, preventing it from descending further and achieving a safety protection function. Therefore, the guide rail base 100 not only adaptively adjusts its height according to the guide rail 200's descent distance during normal operation, saving on maintenance costs, but also effectively supports the guide rail 200 when it descents rapidly due to an abnormality, preventing excessive descent and ensuring equipment safety.

[0039] Optionally, the elastic element 5 includes a spring. The spring has good elastic properties, which can better realize the automatic adjustment of the distance between the base plate 32 and the guide rail 200.

[0040] Optionally, in one embodiment, combined with Figures 1 to 3 As shown, there are two stops 4, which are spaced apart circumferentially along the base plate 32. Thus, when the guide rail 200 descends rapidly, the two stops 4 work together to better restrict the movement of the support assembly 10, thereby preventing the guide rail 200 from sliding down and ensuring the safety of the equipment.

[0041] Preferably, the two stoppers 4 can be arranged opposite each other, so that the stoppers 4 can better fix the support assembly 10 and achieve braking when the guide rail 200 slides down rapidly.

[0042] In one embodiment, combined Figure 1 and Figure 2As shown, the stop 4 includes a latching part 43 and a driving part 41 connected together. In the locked state, the latching part 43 engages with the support assembly 10 to restrict the support assembly 10 from moving towards the base plate 32. In the unlocked state, the latching part 43 releases its engagement with the support assembly 10, and the driving part 41 can engage with the support assembly 10. When the speed at which the support rod 2 moves towards the base plate 32 reaches a speed threshold, the driving part 41 can drive the stop 4 from the unlocked state to the locked state under the action of the support assembly 10. Thus, when the speed at which the support assembly 10 moves towards the base plate 32 is less than the speed threshold, the guide rail base 100 can adjust the distance between the base plate 32 and the guide rail 200 in a timely manner under the elastic action of the elastic member 5, so as to achieve adaptive adjustment of the height of the guide rail base 100, thereby preventing the guide rail 200 from bending. When the support component 10 moves towards the side closer to the base plate 32 at a speed threshold, the connection between the drive unit 41 and the locking part 43 enables the drive unit 41 to drive the locking part 43 in a timely manner, and enables the locking part 43 to quickly lock with the support component 10, thereby achieving rapid braking of the support component 10 and preventing the guide rail 200 from sliding down a large distance.

[0043] Furthermore, in one embodiment, combined with Figures 1 to 3 As shown, the stop 4 is rotatably mounted on the side plate 31 via a pivot 42. The pivot 42 is located between the latching part 43 and the driving part 41. The weight of the latching part 43 is greater than the weight of the driving part 41, allowing the stop 4 to remain in the unlocked state under the influence of gravity. Thus, since the weight of the latching part 43 is greater than the weight of the driving part 41, in the unlocked state, gravity will drive the pivot 42 to have a tendency to rotate vertically downwards, allowing the latching part 43 to remain in contact with the support assembly 10. This rotational tendency keeps the driving part 41 in a state where it can contact and engage with the support assembly 10. When the support assembly 10 moves towards the side closer to the base plate 32 at a relatively low speed, the driving part 41 remains in contact with the support assembly 10 due to the insurmountable force of gravity, i.e., the stop 4 remains in the unlocked state. When the support assembly 10 moves towards the base plate 32 at a speed threshold, the force exerted by the support assembly 10 on the drive unit 41 is large. Therefore, the drive unit 41 overcomes gravity, causing the rotating shaft 42 to rotate in the opposite direction of the driving trend, thus switching the stop 4 to the locked state. In the unlocked state, the drive unit 41 can promptly drive the locking part 43 according to the movement state of the support assembly 10, thereby changing the state of the stop 4. This design ensures that the guide rail base 100 can function in the corresponding state, improving the reliability of the guide rail base 100.

[0044] In one embodiment, combined Figure 1 and Figure 2As shown, the support assembly 10 includes a support plate 1 and a support rod 2. The support plate 1 and the base plate 32 are arranged opposite to each other. The support plate 1 supports the guide rail 200. The support rod 2 is located on the side of the support plate 1 facing the base plate 32. The end of the support rod 2 away from the support plate 1 is connected to the elastic member 5. The support rod 2 has a mating part 21. In the unlocked state, the mating part 21 can contact and engage with the driving part 41. In the locked state, the locking part 43 engages with the mating part 21. When the speed at which the support rod 2 moves towards the side closer to the base plate 32 reaches a speed threshold, the mating part 21 and the driving part 41 cooperate to drive the stop member 4 from the unlocked state to the locked state. Thus, when the guide rail 200 abuts against the support plate 1 and moves towards the side closer to the base plate 32, the support plate 1 can drive the support rod 2 to move towards the side closer to the base plate 32 to compress the elastic member 5, thereby adjusting the distance between the base plate 32 and the support plate 1, and realizing the adaptive adjustment of the height of the guide rail base 100. When the guide rail 200 slowly moves towards the support plate 1 due to building shrinkage and settlement, the descent speed of the guide rail 200 is relatively small. Therefore, the speed at which the support rod 2 moves towards the base plate 32 is less than the speed threshold. The force exerted by the support rod 2 on the drive unit 41 through the mating part 21 is small, and the drive unit 41 remains in contact with the mating part 21 under the action of gravity. However, when the speed at which the support rod 2 moves towards the base plate 32 reaches the speed threshold, the force exerted by the support rod 2 on the drive unit 41 through the mating part 21 is larger. The drive unit 41 can overcome the action of gravity and drive the rotating shaft 42 to rotate at a large angle, thereby causing the locking part 43 to rotate at a large angle to the position where it engages with the mating part 21, thus locking the support rod 2 and restricting its movement towards the base plate 32. In the snap-fit ​​state, since the snap-fit ​​part 43 snaps into the mating part 21 and is connected to the rotating shaft 42, the snap-fit ​​part 43 can apply a force away from the base plate 32 to the support rod 2, thereby restricting the movement of the support rod 2 and achieving support and fixation of the guide rail 200.

[0045] Optionally, the extension direction of the support rod 2 is the same as the extension direction of the guide rail 200, so that the elastic element 5 can better adjust the height of the guide rail base 100.

[0046] Furthermore, in one embodiment, combined with Figure 2 and Figure 3As shown, the mating part 21 includes multiple locking teeth 21a, which are arranged sequentially along the extension direction of the support rod 2. In the locked state, the engaging part 43 can restrict the support rod 2 from moving towards the side closer to the base plate 32 by engaging with one of the locking teeth 21a. In the unlocked state, the driving part 41 can engage with one of the locking teeth 21a. Thus, when the stop member 4 is in the locked state, the end of the engaging part 43 facing away from the rotating shaft 42 can extend into the gap between two adjacent locking teeth 21a and abut against the side wall of the locking tooth 21a closer to the support plate 1. By applying force to the locking tooth 21a, the continued movement of the support rod 2 is prevented, thereby braking the guide rail 200. Multiple locking teeth 21a are arranged along the extension direction of the support rod 2. This allows the drive unit 41 to engage with one of the locking teeth 21a under gravity when the stop 4 is in the unlocked state. Also, when the support rod 2 moves towards the side closer to the base plate 32, the drive unit 41 can engage with the adjacent locking tooth 21a that is close to the support plate 1 after separating from the previous locking tooth 21a. This allows the locking tooth 21a to apply a large force to the drive unit 41 in time when the speed at which the support rod 2 moves towards the base plate 32 reaches the speed threshold, so that the rotating shaft 42 drives the locking part 43 to rotate at a large angle and engage with the mating part 21.

[0047] Optionally, the locking teeth 21a may be arranged around the support rod 2. Schematic, the locking teeth 21a may be formed by creating a groove on the surface of the support rod 2, or by creating a protrusion on the surface of the support rod 2.

[0048] Furthermore, in one embodiment, combined with Figure 3 As shown, the locking tooth 21a has a first surface facing the base plate 32, and the engaging part 43 has a second surface. In the locked state, the second surface can abut against the first surface of the locking tooth 21a of the engaging part 43, and the first surface and the second surface are in contact. Thus, when the engaging part 43 engages with the locking tooth 21a, the contact area between the first surface and the second surface is large, thereby enabling the engaging part 43 to reliably brake the support rod 2, which helps to improve the reliability of the guide rail base 100.

[0049] Furthermore, in one embodiment, combined with Figures 1 to 3As shown, the engaging part 43 and the driving part 41 are rod-shaped structures. The stop 4 is rotatably mounted on the side plate 31 via a rotating shaft 42. The rotating shaft 42 is located between the engaging part 43 and the driving part 41. The minimum distance from the surface of the rotating shaft 42 to the root of the locking tooth 21a is the first distance. The length of the engaging part 43 is greater than the first distance, and the length of the driving part 41 is less than the first distance. In this way, it can not only ensure that the driving part 41 will not jam due to motion interference with the side wall of the locking tooth 21a in the unlocked state, but also ensure that when the driving part 41 drives the stop 4 to switch from the unlocked state to the locked state, the movement stroke of the end of the engaging part 43 away from the rotating shaft 42 can be greater than the movement stroke of the end of the driving part 41 away from the rotating shaft 42, so as to realize the amplification of the movement stroke, which is beneficial to the switching of the state of the engaging part 43.

[0050] Optionally, in one embodiment, the engaging portion 43 and the driving portion 41 are respectively disposed on both sides of the rotating shaft 42. This ensures that when the support assembly 10 moves at a speed below a speed threshold, the engaging portion 43 will not cross the centerline position parallel to the extension direction of the support rod 2. Furthermore, when the length of the engaging portion 43 is greater than the length of the driving portion 41, the engaging portion 43 can respond to state switching more quickly.

[0051] In other embodiments, the locking part 43 and the driving part 41 may also be arranged at an angle, and in the unlocked state, the end of the locking part 43 away from the rotating shaft 42 extends away from the support rod 2, and the end of the driving part 41 away from the rotating shaft 42 extends towards the elastic member 5, so that the driving part 41 can contact the locking tooth 21a under the action of gravity.

[0052] Optionally, in the snap-fit ​​state, the end of the snap-fit ​​part 43 that is away from the rotating shaft 42 can be tilted toward the support plate 1.

[0053] Optionally, in one embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the axis of the rotating shaft 42 is perpendicular to the extension direction of the support rod 2. This allows for better configuration of the drive unit 41 and the locking part 43 as needed. In the unlocked state, the locking part 43 ensures that the drive unit 41 can contact and engage with the mating part 21. Furthermore, when the drive unit 41 drives the rotating shaft 42 to rotate, causing the stop member 4 to switch to the locked state, the locking part 43 can abut against one of the locking teeth 21a to restrict the movement of the support rod 2.

[0054] In one embodiment, combined Figures 1 to 3As shown, the latching part 43 is provided with a magnetic element 44. In the locked state, the magnetic element 44 can be magnetically attracted to the support assembly 10. Thus, when the driving part 41 drives the latching part 43 to switch the stop member 4 from the unlocked state to the locked state, the magnetic element 44 can be attracted to the support assembly 10 under magnetic action to prevent the latching part 43 from rebounding due to collision with the support assembly 10, thereby preventing the latching part 43 from stopping the support rod 2 in time.

[0055] Indicatively, the magnetic element 44 can be magnetically engaged with the mating part 21 in the support rod 2, for example, with the side wall of a locking tooth 21a in the mating part 21.

[0056] Understandably, the support member can be made of a material that can be magnetically attracted by the magnetic member 44, so as to ensure that the magnetic member 44 can be magnetically attracted to the side wall of the locking tooth 21a.

[0057] In one embodiment, combined Figures 1 to 3 As shown, there are multiple side plates 31 arranged circumferentially along the base plate 32 and connected sequentially. The base plate 32 and the multiple side plates 31 together form a base cavity 3a. The elastic element 5 and the stop element 4 are both located in the base cavity 3a. In this way, the movement between the elastic element 5, the stop element 4, and the support assembly 10 can be prevented from being disturbed or damaged due to external factors, thereby ensuring the reliability of the guide rail base 100.

[0058] Optionally, the end of the support rod 2 that faces away from the support plate 1 can be inserted into the base cavity 3a and connected to the elastic element 5.

[0059] Optionally, the extension direction of the rotating shaft 42 is perpendicular to the thickness direction of the base plate 32. Both ends of the rotating shaft 42 are rotatably connected to two side plates 31, so that the side plates 31 can better support the rotating shaft 42. This allows the stop 4 to better support the support assembly 10 when it is in the locked state, thus restricting the movement of the support assembly 10.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A guide rail base, characterized in that, include: The base body includes a base plate and side plates disposed on the base plate; A support assembly is provided at a distance from the base plate and is used to support the guide rail; An elastic element is disposed between the base plate and the support assembly; A stop is movably disposed on the side plate and cooperates with the support assembly. The stop has an unlocked state and a locked state. In the locked state, the stop can restrict the support assembly from moving towards the side of the base plate. In the unlocked state, the stop can release the lock on the support assembly. When the speed at which the support assembly moves towards the side of the base plate reaches a speed threshold, the stop can switch from the unlocked state to the locked state.

2. The guide rail base according to claim 1, characterized in that, The stop includes a latching part and a driving part connected together. In the locked state, the latching part engages with the support assembly to restrict the support assembly from moving towards the side closer to the base plate. In the unlocked state, the latching part is released from the latching with the support component, and the driving part can contact and cooperate with the support component. When the speed at which the support rod moves towards the side closer to the base plate reaches a speed threshold, the driving part can drive the stop to switch from the unlocked state to the locked state under the action of the support component.

3. The guide rail base according to claim 2, characterized in that, The stop is rotatably mounted on the side plate via a pivot located between the latching part and the driving part. The weight of the latching part is greater than the weight of the driving part, and the stop can be maintained in the unlocked state under the action of gravity.

4. The guide rail base according to claim 2, characterized in that, The support assembly includes a support plate and a support rod. The support plate is disposed opposite to the base plate and is used to support the guide rail. The support rod is located on the side of the support plate facing the base plate, and the end of the support rod away from the support plate is connected to the elastic element. The support rod has a mating part. In the unlocked state, the mating part can contact and engage with the driving part. In the locked state, the locking part engages with the mating part. When the speed at which the support rod moves towards the base plate reaches a speed threshold, the mating part engages with the driving part to drive the stop element to rotate from the unlocked state to the locked state.

5. The guide rail base according to claim 4, characterized in that, The mating part includes multiple locking teeth, which are arranged sequentially along the extension direction of the support rod. In the locked state, the locking part can restrict the support rod from moving towards the base plate by engaging with one of the locking teeth. In the unlocked state, the driving part can engage with one of the locking teeth.

6. The guide rail base according to claim 5, characterized in that, The locking tooth has a first surface facing the base plate, and the engaging portion has a second surface. In the locked state, the second surface can abut against the first surface of the locking tooth that engages the engaging portion, and the first surface and the second surface are in contact. And / or, the locking part and the driving part are rod-shaped structures, the stop is rotatably disposed on the side plate via a rotating shaft, the rotating shaft is located between the locking part and the driving part, the minimum distance from the surface of the rotating shaft to the root of the locking tooth is a first distance, the length of the locking part is greater than the first distance, and the length of the driving part is less than the first distance.

7. The guide rail base according to claim 2, characterized in that, The snap-fit ​​part is provided with a magnetic component, and in the locked state, the magnetic component can be magnetically attracted to the support component.

8. The guide rail base according to claim 3, characterized in that, The snap-fit ​​portion and the drive portion are respectively located on both sides of the rotating shaft.

9. The guide rail base according to claim 1, characterized in that, The number of side plates is multiple, and the multiple side plates are arranged circumferentially along the base plate and connected in sequence. The base plate and the multiple side plates together form a base cavity. The elastic element and the stop element are both provided in the base cavity.

10. The guide rail base according to any one of claims 1 to 9, characterized in that, The number of the stop members is two, and the two stop members are arranged at intervals along the circumference of the base plate.

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