Armrest lock
By using the locking tongue of the unlocking hook and ratchet to cooperate with the limiting groove, the welding process is eliminated, solving the problems of high processing precision and insufficient load-bearing capacity of traditional handrail locks, and realizing a handrail lock design with lower cost and higher stability.
Patent Information
- Application Number
- CN202423250175.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Traditional car armrest locks require high precision in manufacturing, are costly, and are prone to failure or damage when subjected to torque loads, affecting the riding experience and safety.
The locking tongue, which uses an unlocking hook and ratchet to engage with the limiting groove, eliminates the welding process. The engagement of the locking tongue and the limiting groove reduces the machining accuracy requirements, increases the contact area to improve the load-bearing capacity, and reduces maintenance costs through modular connection.
It reduces production costs, improves the stability and load-bearing capacity of the mechanism, eliminates rotational clearance, simplifies the maintenance process, and reduces maintenance costs.
Smart Images
Figure CN223672333U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of lockset, especially relates to a handrail lock. BACKGROUND
[0002] In the design of automobile seats, the rear central armrest is an important component for improving passenger comfort and convenience, and its stability and reliability are crucial. The armrest lock, as a key device for locking the central armrest of the rear row of the car, directly affects the use experience and safety of the armrest. The traditional armrest locking method mainly relies on the locking of multiple tooth features of the toothed part. Although this design achieves the basic locking function of the armrest to some extent, it has many shortcomings.
[0003] Firstly, the machining precision of the tooth feature is extremely high. In order to ensure the tightness and stability of the locking, the shape, size and arrangement of each tooth need to be strictly controlled, which undoubtedly increases the difficulty and cost of machining. High-precision machining equipment and complex process flow limit the production efficiency of traditional armrest locks, and also increase the manufacturing cost of the product.
[0004] Secondly, due to the existence of machining errors, the meshing surface between the teeth is often difficult to achieve the ideal state of complete adhesion. This small gap may cause unnecessary rotation of the armrest during locking, which not only affects the stability of the locking, but also produces abnormal noise, reducing the passenger's riding experience.
[0005] In addition, the size of the traditional tooth feature is relatively small, which makes it difficult to withstand a large torque load. During vehicle driving, especially when encountering bumpy sections, the armrest may be subjected to a large impact force or torque, and the traditional tooth locking method is often difficult to effectively resist such external forces, resulting in locking failure or damage. INVENTION CONTENTS
[0006] To solve the above problems, the purpose of the utility model is to provide an armrest lock which has low machining precision requirement, lower production cost and can bear larger load.
[0007] To achieve the above purpose, the technical scheme of the utility model is as follows:
[0008] An armrest lock, comprising a lock shell and an unlocking hook, a lock shaft, a ratchet and a limiting piece arranged in the lock shell, the unlocking hook and the lock shaft are both rotationally connected in the lock shell, the ratchet is sleeved and fixedly connected to the lock shaft, and the limiting piece is arranged on one side of the ratchet; the lock shaft protrudes from the lock shell and is fixedly connected with the armrest, and the axis of the lock shaft is coaxial with the rotation axis of the armrest.
[0009] The unlocking hook is provided with a locking tongue, and is further provided with an elastic element, which gives the unlocking hook an elastic force for rotating towards the ratchet wheel;
[0010] The ratchet wheel is provided with a limiting groove, a first limiting tongue and a second limiting tongue, and the limiting element is located on the rotating path of the first limiting tongue and the second limiting tongue.
[0011] When the handrail is folded, the locking tongue abuts against the limiting groove by the elastic force and limits the rotation of the ratchet wheel towards the opening direction, and the limiting element cooperates with the second limiting tongue to limit the rotation of the ratchet wheel towards the folding direction.
[0012] When being opened, the unlocking hook is driven to rotate by an external force, the locking tongue is away from the limiting groove, and when the handrail is opened by rotating through an external force, the locking shaft is driven to rotate, the rotation of the locking shaft drives the rotation of the ratchet wheel, and when the first limiting tongue rotates to cooperate with the limiting element, the ratchet wheel and the handrail are limited.
[0013] According to an embodiment of the utility model, the ratchet wheel is provided with a waist-shaped assembly hole, the locking shaft is provided with a waist-shaped assembly part, the cross section shape of waist-shaped assembly part matches with waist-shaped assembly hole, the ratchet wheel is set on the waist-shaped assembly part through the waist-shaped assembly hole, and the waist-shaped assembly hole and the waist-shaped assembly part are in interference fit.
[0014] According to an embodiment of the utility model, the one end outer wall of the locking shaft extending from the lock shell is provided with a rotation limiting part and a fixed threaded hole on the end face, and the handrail is provided with a mounting hole matching with the rotation limiting part.
[0015] The rotation limiting part is arranged in the mounting hole, and the rotation of the locking shaft relative to the handrail can be limited by cooperation; the locking shaft and the handrail are fixed by the bolt threaded connection in the mounting hole and the fixed threaded hole.
[0016] According to an embodiment of the utility model, the rotation limiting part includes two oppositely arranged planes and two oppositely arranged inclined surfaces.
[0017] According to an embodiment of the utility model, the limiting element is a limiting pin, and the limiting pin is fixedly connected with the lock shell.
[0018] According to an embodiment of the utility model, the elastic element is a torsion spring.
[0019] According to an embodiment of the utility model, the lock shell includes a first shell and a second shell, and the unlocking hook, the ratchet wheel and the limiting element are arranged between the first shell and the second shell.
[0020] The utility model discloses the following advantages and positive effects compared with prior art by adopting the above technical scheme.
[0021] 1. The utility model discloses the interlocking of the lock tongue and the limiting groove is matched with each other, and compared with the traditional tooth pattern cooperation, the processing precision requirement is small, and the production cost is lower, and the traditional tooth pattern cooperation needs high-precision processing to ensure the close meshing between the teeth, and the cooperation mode of the lock tongue and the limiting groove is relatively tolerant, can guarantee the stable cooperation effect even under the condition that there is certain processing error, thereby reduce the production cost.
[0022] Secondly, in the bearing capacity aspect, the contact area between the lock hook and the ratchet wheel is increased due to the larger cooperation surface characteristics of the lock tongue and the limiting groove, thereby improving the bearing capacity of the mechanism and enabling the mechanism to bear greater load.
[0023] In addition, the utility model discloses the limiting of the ratchet wheel from two directions by the unlocking hook and the limiting piece, effectively eliminates the rotation gap. The traditional tooth pattern cooperation mode is prone to the situation that the teeth cannot be completely attached to each other due to processing error and long-term use wear, resulting in rotation gap when folding, affecting the stability and reliability of the mechanism. The utility model completely avoids this problem, improves the folding precision and stability of the mechanism.
[0024] 2. The utility model discloses the ratchet wheel is set on the waist shape assembly part through the waist shape assembly hole, and the waist shape assembly hole and the waist shape assembly part are in interference fit, and this assembly structure is lower in the requirement for the machining precision of parts, and is higher in strength, simple in structure and easier to process, and cancels the welding procedure, and is lower in cost.
[0025] 3. The utility model discloses the lock shaft is connected with the handrail through the rotary limiting portion and the mounting hole, so that the modularization is realized, and the maintenance cost is reduced. The traditional structure adopts the welding process to weld the connecting sheet metal on the lock shaft and the handrail into a welded assembly, and welding needs to purchase welding equipment and special tooling, and if the welded assembly is damaged, the whole needs to be replaced, and the maintenance cost is high. DRAWINGS
[0026] The specific embodiments of the utility model will be further explained in detail below in combination with the drawings, wherein:
[0027] Figure 1 It is the axonometric drawing of the utility model;
[0028] Figure 2 It is the explosion drawing of the utility model;
[0029] Figure 3 It is the assembly schematic view of the lock shaft and the ratchet wheel of the utility model;
[0030] Figure 4Fig. 2 is a schematic view of the folding state of the handrail;
[0031] Figure 5 Fig. 3 is a schematic view of the opening process of the handrail Figure 1 ;
[0032] Figure 6 Fig. 4 is a schematic view of the opening process of the handrail Figure 2 ;
[0033] Figure 7 Fig. 5 is a schematic view of the folding state of the handrail.
[0034] BRIEF DESCRIPTION OF DRAWINGS
[0035] 1, first shell; 2, second shell; 3, unlocking hook; 4, lock tongue; 5, torsional spring; 6, unlocking hook gasket; 7, ratchet; 8, limiting groove; 9, first limiting tongue; 10, second limiting tongue; 11, lock shaft; 12, waist-shaped assembly part; 13, rotation limiting part; 14, bearing; 15, limiting pin; 16, hollow rivet; 17, unlocking hook rotating shaft; 18, fixed threaded hole. DETAILED DESCRIPTION
[0036] The utility model will be explained in further detail below in combination with the drawings and specific embodiments. The advantages and features of the utility model will be more apparent according to the following description. It should be noted that the drawings are all in a very simplified form and all use non-precise ratios, only for the purpose of facilitating, clearly assisting in explaining the embodiment of the utility model.
[0037] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directionality indications will also change accordingly.
[0038] Referring to Figures 1 to 7 , the core of the utility model is to provide a handrail lock, which comprises a lock shell and an unlocking hook 3, a lock shaft 11, a ratchet 7 and a limiting piece arranged in the lock shell, the unlocking hook 3 and the lock shaft 11 are both rotationally connected in the lock shell, the ratchet 7 is sleeved and fixedly connected to the lock shaft 11, and the limiting piece is arranged on one side of the ratchet 7; the lock shaft 11 extends out of the lock shell and is fixedly connected with the handrail, and the axis of the lock shaft 11 is coaxial with the rotation axis of the handrail.
[0039] The unlocking hook 3 is provided with a lock tongue 4, and the unlocking hook 3 is also provided with an elastic member, which gives the unlocking hook 3 an elastic force for rotating towards the ratchet 7, and the elastic member is a torsional spring 5 in this embodiment.
[0040] The ratchet 7 is provided with a limiting groove 8, a first limiting tongue 9 and a second limiting tongue 10, and the limiting piece is located on the rotation path of the first limiting tongue 9 and the second limiting tongue 10.
[0041] When the handrail is folded, the locking tongue 4 abuts against the limiting groove 8 by elastic force and limits the rotation of the ratchet wheel 7 towards the opening direction, and the limiting piece cooperates with the second limiting tongue 10 to limit the rotation of the ratchet wheel 7 towards the folding direction.
[0042] When the handrail is unfolded, the unlocking hook 3 is driven to rotate by external force, the locking tongue 4 leaves the limiting groove 8 to release the limitation of the rotation of the ratchet wheel 7 towards the opening direction, and when the handrail is unfolded by external force, the locking shaft 11 is driven to rotate, the rotation of the locking shaft 11 drives the rotation of the ratchet wheel 7, the side wall of the ratchet wheel 7 limits the locking tongue 4, and the locking tongue 4 abuts against the side wall of the ratchet wheel 7 by elastic force, when the first limiting tongue 9 rotates to cooperate with the limiting piece, the ratchet wheel 7 and the handrail are limited.
[0043] Referring to Figure 2 , the lock shell comprises a first shell 1 and a second shell 2, the unlocking hook 3, the ratchet wheel 7 and the limiting piece are arranged between the first shell 1 and the second shell 2, and the limiting piece is a limiting pin 15 in the embodiment, the two ends of the limiting pin 15 are fixedly connected with the first shell 1 and the second shell 2 respectively, the unlocking hook rotating shaft 17 is arranged between the first shell 1 and the second shell 2, the unlocking hook rotating shaft 17 connects the first shell 1 and the second shell 2, the unlocking hook 3 is sleeved and rotationally connected on the unlocking hook rotating shaft 17, and the unlocking hook gasket 6 is further arranged between the unlocking hook 3 and the second shell 2, and the unlocking hook gasket 6 is sleeved on the unlocking hook rotating shaft 17. The locking shaft 11 is provided with one bearing 14 between the first shell 1 and the second shell 2, and the locking shaft 11 is arranged in the two bearings 14. The first shell 1 and the second shell 2 are further provided with two hollow rivets 16, and the hollow rivets 16 are used for connecting the first shell 1 and the second shell 2.
[0044] The unlocking hook 3 and the ratchet wheel 7 of the utility model adopt the cooperation of the locking tongue 4 and the limiting groove 8, compared with the traditional tooth cooperation, the processing precision requirement is small, and the production cost is lower, the traditional tooth cooperation needs high-precision processing to ensure the close meshing between the teeth, and the cooperation mode of the locking tongue 4 and the limiting groove 8 is relatively tolerant, even under the condition of certain processing error, the stable cooperation effect can be ensured, so that the production cost is reduced. Meanwhile, the utility model can reduce the number of parts, and cancels three parts of the ratchet, the ratchet gasket and the ratchet rotating shaft bushing.
[0045] Secondly, in the bearing capacity aspect, due to the larger cooperation surface characteristics of the locking tongue 4 and the limiting groove 8, the contact area between the locking hook and the ratchet wheel 7 is increased, and then the bearing capacity of the mechanism is improved, and larger load can be borne.
[0046] Further, the utility model discloses through the locking hook 3 and the limiting piece from two directions to the ratchet wheel 7 position limiting, effectively eliminated the rotation gap.
[0047] Further, the profile of the limiting groove 8 matches the profile of the lock tongue 4, and cooperation between the limiting groove 8 and the lock tongue 4 can make the locking hook 3 and the ratchet wheel 7 lock tighter.
[0048] The ratchet wheel 7 is provided with a waist-shaped assembly hole, the lock shaft 11 is provided with a waist-shaped assembly part 12, the cross-sectional shape of the waist-shaped assembly part 12 matches the waist-shaped assembly hole, the ratchet wheel 7 is sleeved on the waist-shaped assembly part 12 through the waist-shaped assembly hole, and the waist-shaped assembly hole is in interference fit with the waist-shaped assembly part 12.
[0049] The ratchet wheel 7 is sleeved on the waist-shaped assembly part 12 through the waist-shaped assembly hole, and the waist-shaped assembly hole is in interference fit with the waist-shaped assembly part 12, the assembly structure has lower requirements on the machining precision of parts, higher strength, simple structure, easier processing, cancellation of the welding process, and lower cost.
[0050] The end wall of the lock shaft 11 extending out of the lock shell is provided with a rotation limiting part 13, and the end face is provided with a fixed threaded hole 18, and the handrail is provided with a mounting hole matching the rotation limiting part 13.
[0051] Specifically, the rotation limiting part 13 includes two oppositely arranged planes and two oppositely arranged inclined surfaces.
[0052] The lock shaft 11 is connected with the handrail through the rotation limiting part 13 and the mounting hole, so that modularity is realized, disassembly and assembly are more convenient, and maintenance cost is reduced.
[0053] The working process of the utility model will be further described below:
[0054] Referring to Figure 4 、 5 , 6, in the process of opening the handrail, first of all, the unlocking hook 3 is driven to rotate through the hand held arranged on the handrail overcoming the elastic force, specifically, the hand held is connected with the unlocking hook 3 through a steel wire, and the hand held drives the unlocking hook 3 to rotate by pulling the steel wire to the right.
[0055] The locking tongue 4 on the unlocking hook 3 is away from the limiting slot 8 to release the limitation of the rotation of the ratchet 7 towards the opening direction, then the hand drives the handrail to rotate and open, the handrail drives the locking shaft 11 and the ratchet 7 to rotate, and the state as shown in the figure is formed, at this time, the external force on the handrail can be cancelled, and the locking tongue 4 is in abutment with the side wall of the ratchet 7 through the elastic force. Figure 5
[0056] When the first limiting tongue 9 is rotated to cooperate with the limiting pin 15, the ratchet 7 and the handrail are limited, that is, the handrail is opened to the limit position.
[0057] Referring to Figure 7 , 4 , in the folding process of the handrail, the hand drives the handrail to rotate and open, the handrail drives the locking shaft 11 and the ratchet 7 to rotate, when the limiting slot 8 is rotated to be opposite to the locking tongue 4, the side wall of the ratchet 7 releases the limitation of the locking tongue 4, the unlocking hook 3 is rotated towards the ratchet 7 through the elastic force, the locking tongue 4 enters the limiting slot 8 and limits the rotation of the ratchet 7 towards the opening direction, and at the same time, the limiting pin 15 also cooperates with the second limiting tongue 10 to limit the rotation of the ratchet 7 towards the folding direction.
[0058] The utility model improves the strength of the locking mechanism, reduces the manufacturing precision requirement of core parts (the ratchet 7, the pawl), eliminates the rotation gap of the locking shaft 11 after locking, cancels the welding process, and reduces the cost; the assembly relationship of the locking shaft 11 and the handrail connecting sheet metal is optimized, the welding process is cancelled, bolt assembly is adopted, the modularization is more convenient to disassemble and assemble, and the maintenance cost is reduced. Meanwhile, the utility model can reduce the number of parts, and cancels three parts of the pawl, the pawl gasket and the pawl rotating shaft bushing.
[0059] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments. Even if various changes are made to the utility model, if the changes belong to the scope of the utility model claims and equivalent technologies, they still fall within the protection scope of the utility model.
Claims
1. A handrail lock characterised in that, The utility model provides a locking device of handrail, including lock shell and be located in the unlocking hook, lock axle, ratchet wheel and limiting piece in the lock shell, the unlocking hook and the lock axle are all rotationally connected in the lock shell, the ratchet wheel is sleeved and is fixedly connected in the lock axle, the limiting piece is located in one side of the ratchet wheel, the lock axle is fixedly connected with the handrail and is coaxial with the rotation axis of the handrail, The unlocking hook is provided with a lock tongue, and the unlocking hook is also provided with an elastic element, which gives the unlocking hook an elastic force for rotating towards the ratchet wheel, The ratchet wheel is provided with a limiting groove, a first limiting tongue and a second limiting tongue, and the limiting piece is located on the rotation path of the first limiting tongue and the second limiting tongue, When the handrail is folded, the lock tongue abuts in the limiting groove by the elastic force and limits the rotation of the ratchet wheel towards the opening direction, and the limiting piece cooperates with the second limiting tongue to limit the rotation of the ratchet wheel towards the folding direction, When opening, the unlocking hook is driven to rotate by external force, the lock tongue is away from the limiting groove, and when the handrail is opened by rotating through external force, the lock axle is driven to rotate, the rotation of the lock axle drives the rotation of the ratchet wheel, and when the first limiting tongue rotates to cooperate with the limiting piece, the ratchet wheel and the handrail are limited.
2. The lock according to claim 1, wherein The ratchet wheel is provided with a waist-shaped assembly hole, the lock axle is provided with a waist-shaped assembly part, the cross-sectional shape of the waist-shaped assembly part matches the waist-shaped assembly hole, the ratchet wheel is sleeved on the waist-shaped assembly part through the waist-shaped assembly hole, and the waist-shaped assembly hole and the waist-shaped assembly part are in interference fit.
3. The lock of claim 1, wherein The end wall of the lock axle extending out of the lock shell is provided with a rotation limiting part and a fixed threaded hole on the end face, and the handrail is provided with a mounting hole matching the rotation limiting part in shape. The rotation limiting part is arranged in the mounting hole and cooperates with the mounting hole to limit the rotation of the lock axle relative to the handrail, and a bolt is arranged in the mounting hole and is threadedly connected to the fixed threaded hole to fix the lock axle and the handrail.
4. The lock according to claim 3, wherein The rotation limiting part includes two oppositely arranged planes and two oppositely arranged inclined surfaces.
5. The lock of claim 1, wherein The limiting piece is a limiting pin, and the limiting pin is fixedly connected to the lock shell.
6. The lock of claim 1, wherein The elastic element is a torsion spring.
7. The lock of claim 1, wherein The lock shell includes a first shell and a second shell, and the unlocking hook, the ratchet wheel and the limiting piece are arranged between the first shell and the second shell.