Locking mechanism and door stopper

Abstract

The present invention discloses a locking mechanism, including a fixed seat, a slider, a swing arm, an elastic member, an elastic component and two buckle plates; the slider is slidably connected to the fixed seat, and the two buckle plates are respectively rotatably connected to the fixed seat, and the slider is respectively connected to the two buckle plates, and when the slider slides, the two buckle plates are driven to move away from or approach each other; the elastic member is connected between the slider and the fixed seat and is used to drive the slider to reset; the first end of the swing arm is rotatably connected to the slider, and the second end of the swing arm is limited on the fixed seat and moves at least in a circular path; the elastic component is connected to the fixed seat, and the elastic component is used to lock the second end of the swing arm, and the elastic component is also used to apply a force to the second end of the swing arm, and the second end of the swing arm can move around the circular path to the initial position under the joint action of the elastic member and the force; this solution mainly solves the technical problems of high manufacturing cost and low service life of door suction in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of locking mechanisms, and in particular to a locking mechanism and a door stopper. Background Art

[0002] Most existing door catches use a magnetic structure, securing the door to prevent strong slamming and locking caused by strong winds. While this effectively protects household doors, magnetic door catches are not effective against strong winds. To improve the retention of door catches, a small number of door catches use gear-type structures. However, these gear-type door catches are more expensive and prone to tooth breakage over time.

[0003] Therefore, there is a need to improve the existing technology. Summary of the Invention

[0004] The present invention provides a locking mechanism and a door stopper, which mainly solve the technical problems of high manufacturing cost and short service life of the door stopper in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A locking mechanism includes a fixing seat, a slider, a swing arm, an elastic member, an elastic component and two buckle plates;

[0007] The slider is slidably connected to the fixing seat along a first direction, the two pinch plates are respectively rotatably connected to the fixing seat, the slider is respectively connected to the two pinch plates, and when the slider slides relative to the fixing seat, it has a first position in sequence along the first direction so that the two pinch plates are separated from each other and a second position so that the two pinch plates are close to each other, and the close proximity of the two pinch plates is used to lock a preset object; the elastic member is connected between the slider and the fixing seat and is used to drive the slider to move from the second position to the first position;

[0008] The first end of the swing arm is rotatably connected to the slider, and the second end of the swing arm away from the first end is limited on the fixed seat and moves relative to the fixed seat at least in a circular path; the elastic component is connected to the fixed seat, and when the slider is in the second position, the elastic component is used to lock the position of the second end of the swing arm, and when the slider continues to move from the second position along the first direction to a predetermined position, the elastic component is used to apply a force to the second end of the swing arm in a second direction, and the second direction is not collinear with the first direction, so that the second end of the swing arm can move around the circular path to the initial position under the combined action of the elastic force of the elastic member and the force.

[0009] In one of the technical solutions, the fixing seat is provided with an annular groove connected end to end, the annular groove has the annular path, and the second end of the swing arm is provided with a protrusion, and the protrusion is confined in the annular groove.

[0010] In one technical solution, the annular groove includes a straight segment and a curved segment, one end of the curved segment is connected to one end of the straight segment to form a first connection point, the other end of the curved segment is connected to the other end of the straight segment to form a second connection point, and the straight segment extends along the first direction;

[0011] When the slider moves from the first position to the second position along the first direction, the protrusion passes through the first connecting point and always moves linearly along the straight segment; and when the protrusion is located at the second connecting point, the second end of the swing arm is freed from the restriction of the elastic component and is subjected to the force of the elastic component in the second direction.

[0012] In one of the technical solutions, the elastic component is arranged on the side of the straight segment facing away from the curved segment, and the elastic component includes an elastomer and a positioning pin. The elastomer is connected between the fixing seat and the positioning pin. A slot is provided at the second end of the swing arm. The positioning pin is limited on the fixing seat and is inserted into the slot by the elastic force of the elastomer. When the protrusion moves to the second connecting point, the positioning pin applies the force to the second end of the swing arm along the second direction under the elastic force of the elastomer.

[0013] In one of the technical solutions, the annular groove is provided with a raised step at the first connecting point, and the step makes the end of the curved segment higher than the end of the straight segment.

[0014] In one of the technical solutions, a guide groove extending along a first direction is provided on the fixed seat, a driving groove is provided on each of the buckle plates, and a protrusion is provided on the slider. The protrusion is simultaneously passed through the guide groove and the driving groove. The slider drives the buckle plate to rotate relative to the fixed seat by squeezing the groove wall of the driving groove through the protrusion.

[0015] In one of the technical solutions, the locking mechanism also includes an upper shell and a lower shell, and the upper shell and the lower shell are spliced ​​together to form an installation cavity, and the fixing seat, the slider, the swing arm, the elastic part, the elastic component and the two buckle plates are all accommodated in the installation cavity, and the upper shell is provided with a notch, and the notch is used to expose the slider and the two buckle plates.

[0016] In one of the technical solutions, a longitudinally penetrating avoidance hole is provided on the fixing seat, the slider is passed through the avoidance hole, the slider includes a first part passing upward relative to the avoidance hole and a second part passing downward relative to the avoidance hole, the elastic member is provided at the top of the fixing seat and is against the first part, the two buckle plates are also provided at the top of the fixing seat, the swing arm and the elastic component are both located at the bottom of the fixing seat, the first end of the swing arm is rotatably connected to the second part, and the second part is slidably connected to the fixing seat along the first direction.

[0017] The present application also provides a door stopper, comprising the locking mechanism described in any of the above technical solutions.

[0018] In one of the technical solutions, the door stopper also includes a connecting piece, which is used to be fixed at the bottom of the door, and the connecting piece is used to push the slider from the first position to the second position, and the two buckle plates are brought close to each other to lock the connecting piece.

[0019] Compared with the prior art, the locking mechanism provided by the present invention has at least the following beneficial effects:

[0020] When the door is unlocked, the door stops moving, and the two latches move closer to each other under the action of the elastic component, so that the two latches can be locked in the position of the door when the slider is in the second position. When the door needs to be unlocked, the door needs to continue to push the slider to slide, and the slider will overcome the elastic force of the elastic component when sliding. When the slider slides to the predetermined position, the elastic component will apply a force in the second direction to the second end of the swing arm away from the slider, and then the second end of the swing arm will move to the initial position around the annular path under the combined action of the elastic force of the elastic component and the force. At this time, the slider has been reset to the initial first position under the elastic force of the elastic component, that is, the slider has driven the two latches away from each other to unlock the restriction on the door, so that the door can leave the locking mechanism.

[0021] The locking mechanism of this solution uses fewer parts and has the advantages of low manufacturing cost, simple assembly and small size. Compared with the traditional magnetic solution, the locking mechanism of this solution locks the door more securely, and the user no longer needs to pull the door with great force when leaving the locking structure, which improves the user experience; in addition, since the locking mechanism of this solution does not use gears, the locking mechanism of this solution will not have the problem of broken teeth, so that when the door stopper uses the locking mechanism of this solution, it has the advantage of longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A front view schematic diagram of a locking mechanism in an unlocked state provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the back side of a locking mechanism in an unlocked state provided in an embodiment of the present application;

[0025] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0026] Figure 4 A front view schematic diagram of a locking mechanism provided in an embodiment of the present application in a locked state;

[0027] Figure 5 A schematic diagram of the back side of a locking mechanism in a locked state provided in an embodiment of the present application;

[0028] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0029] Figure 7 A schematic diagram of the structure of a slider provided in an embodiment of the present application;

[0030] Figure 8 A schematic diagram of the structure of the gusset plate provided in an embodiment of the present application;

[0031] Figure 9 for Figure 1 The structure diagram of the locking mechanism shown is after the housing is provided;

[0032] Figure 10 A schematic diagram of the structure of the locking mechanism provided in an embodiment of the present application when used as a door stopper in combination with a door;

[0033] Figure 11 for Figure 10 A partial enlarged view of point C in the middle.

[0034] Reference numerals:

[0035] 1. Fixing seat; 11. Guide groove; 12. Annular groove; 121. Straight segment; 122. Curved segment; 123. First connecting point; 124. Second connecting point; 125. Step; 13. Bump; 14. Avoidance hole;

[0036] 2. Slider; 21. First part; 22. Second part; 23. Bump;

[0037] 3. Swing arm; 31. First end; 32. Second end; 321. Protrusion; 322. Slot;

[0038] 4. Elastic member; 5. Elastic assembly; 51. Elastic body; 52. Positioning pin; 521. Inclined surface;

[0039] 6. Buckle plate; 61. Drive slot; 7. Upper shell; 71. Notch; 8. Lower shell; 10. Connector. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0041] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0042] It should be understood that the terms, "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0045] Please also refer to Figures 1 to 6 An embodiment of the present invention provides a locking mechanism, which mainly includes a fixing seat 1, a slider 2, a swing arm 3, an elastic member 4, an elastic component 5 and two buckle plates 6.

[0046] The fixing base 1 is provided with a guide groove 11 extending in the first direction (ie, the X direction), and the slider 2 is inserted into the guide groove 11, so that the slider 2 can slide linearly in the X direction relative to the fixing base 1. Figure 1 The M shown in the figure is connected to the fixed seat 1 for rotation, and another buckle plate 6 is connected to the fixed seat 1 for rotation. Figure 1 The N shown in the figure is rotatably connected to the fixed seat 1, and the slider 2 is respectively connected to the two pinch plates 6. When the slider 2 moves along the X direction, it can drive the two pinch plates 6 to approach each other or move away from each other. The two pinch plates 6 approach each other to lock a preset object (such as a door) so that the preset object is confined between the two pinch plates 6, and the two pinch plates 6 move away from each other to unlock the preset object so that the preset object can leave the locking mechanism. In order to facilitate a clearer explanation of the locking mechanism of this scheme, this embodiment introduces the first position and the second position of the slider 2 arranged in sequence along the X direction when sliding. When the slider 2 is in the first position, the two pinch plates 6 are in a state of approaching each other to be able to lock the preset object. When the slider 2 is in the second position, the two pinch plates 6 are in a state of moving away from each other to unlock the preset object. Figure 1 This is a front view of the locking mechanism when the slider 2 is in the first position. Figure 2 and Figure 3 This is a back view of the locking mechanism when the slider 2 is in the first position. Figure 4 This is a front view of the locking mechanism when the slider 2 is in the second position. Figure 5 and Figure 6 These are all rear views of the locking mechanism when the slider 2 is in the second position. The elastic member 4 is connected between the slider 2 and the fixing base 1. The slider 2 is subjected to the elastic force of the elastic member 4 and has a tendency to automatically move from the second position to the first position.

[0047] The fixing seat 1 is provided with an annular groove 12 which is connected end to end. The annular groove 12 is equivalent to having an annular path. The first end 31 of the swing arm 3 is located at Figure 2The position P shown is rotatably connected to the slider 2. A protrusion 321 is provided on the second end 32 of the swing arm 3, distal from the first end 31. This protrusion 321 is retained within the annular groove 12, allowing the second end 32 of the swing arm 3 to be retained on the fixed base 1 and to move relative to the fixed base 1 at least in a circular path. The elastic component 5 is connected to the fixed base 1. When the slider 2 is in the second position, the elastic component 5 is used to lock the position of the second end 32 of the swing arm 3. Because the slider 2 and the swing arm 3 are connected, the swing arm 3 is indirectly locked in position by the elastic component 5. At this time, the two pinch plates 6 securely lock the predetermined object. Furthermore, when the slider 2 continues to move from the second position along the X-direction to the predetermined position, the elastic component 5 is used to apply a force to the second end 32 of the swing arm 3 in a second direction. Furthermore, the second direction cannot be collinear with the first direction. This allows the second end 32 of the swing arm 3 to move along the circular path of the annular groove 12 to its initial position under the combined action of the elastic force of the elastic member 4 and the aforementioned force. It should be additionally explained that if the second direction and the first direction are colinear, when the slider 2 continues to slide along the X direction from the second position, the second end 32 of the swing arm 3 cannot be restored to the initial position along the annular path of the annular groove 12, so that the slider 2 will be in a stuck state where it can only move in the X direction and cannot be restored to the first position.

[0048] Specifically, the door stopper can apply the locking mechanism of the present invention. When in use, the door can push the slider 2 to move from the first position to the second position, so that the two pinch plates 6 are driven by the slider 2 to approach each other so as to achieve the purpose of holding and locking the door. Since the swing arm 3 has been locked in position by the elastic component 5 when the slider 2 is in the second position, the two pinch plates 6 can lock the position of the door when the slider 2 is in the second position; when the door needs to be unlocked, the door needs to continue to push the slider 2 to slide along the X direction. The slider 2 will overcome the elastic force of the elastic component 5 when sliding. When the slider 2 slides to the predetermined position, the elastic component 5 will apply a force to the second end 32 of the swing arm 3 away from the slider 2 along the second direction. Then the second end 32 of the swing arm 3 will move to the initial position around the annular path under the combined action of the elastic force of the elastic member 4 and the force of the elastic component 5. At this time, the slider 2 has been restored to the initial first position under the elastic force of the elastic member 4, that is, the slider 2 has driven the two pinch plates 6 away from each other to unlock the restriction on the door, so that the door can leave the locking mechanism.

[0049] The locking mechanism of this solution uses fewer parts and has the advantages of low manufacturing cost, simple assembly and small size. Compared with the traditional magnetic solution, the locking mechanism of this solution locks the door more securely, and the user no longer needs to pull the door with great force when leaving the locking structure, which improves the user experience; in addition, since the locking mechanism of this solution does not use gears, the locking mechanism of this solution will not have the problem of broken teeth, so that when the door stopper uses the locking mechanism of this solution, it has the advantage of longer service life.

[0050] In other embodiments, the annular groove 12 can also be provided at the second end 32 of the swing arm 3, and correspondingly, the protrusion 321 is provided on the fixed base 1. In this case, the second end 32 of the swing arm 3 can also be moved relative to the fixed base 1 in an annular path. However, the second end 32 of the swing arm 3 of this structure will have a larger shape, and the second end 32 of the swing arm 3 will occupy more space when it moves.

[0051] Please also refer to Figure 3 and Figure 6 The annular groove 12 forms a raised bump 13 in the middle of the annular groove 12 on the fixing seat 1. The annular groove 12 specifically includes a straight section 121 and a curved section 122. One end of the curved section 122 is connected to one end of the straight section 121 to form a first connection 123. The other end of the curved section 122 is connected to the other end of the straight section 121 to form a second connection 124. The straight section 121 extends straight along the first direction X. When the slider 2 moves from the first position to the second position along the X direction, the raised portion 321 on the swing arm 3 passes through the first connection 123 and always moves straight along the straight section 121. In other words, during the entire process of the slider 2 moving straight from the first position to the second position along the X direction, the swing arm 3 also always moves straight along the X direction. This design can improve the smoothness of the movement of the slider 2 from the first position to the second position, and it is easier to realize the function of the elastic component 5 to lock the slider 2 by locking the second end 32 of the swing arm 3. In addition, as Figure 6As shown, when the slider 2 is located at the second position, the protrusion 321 of the swing arm 3 and the second connecting portion 124 are arranged adjacent to each other in sequence along the X direction. When the protrusion 321 of the swing arm 3 does not move to the second connecting portion 124 along the X direction, the second end 32 of the swing arm 3 is restricted by the elastic component 5 or abutted against the side of the protrusion 13 by the elastic component 5, that is, the protrusion 13 also plays a role in restricting the second end 32 of the swing arm 3 so that the second end 32 of the swing arm 3 is restricted in the straight segment 121; when the protrusion 321 of the swing arm 3 moves to the second connecting portion 124 along the X direction, the second end 32 of the swing arm 3 will be free from the restriction of the elastic component 5 and since the protrusion 321 is no longer restricted by the protrusion 13, the second end 32 of the swing arm 3 will smoothly enter the curved segment 122 under the action of the elastic component 5 in the second direction, and then the elastic member 4 will drive the slider 2 to move to the first position in the opposite direction of the X direction. During the movement, the slider 2 will pull the second end 32 of the swing arm 3 along the curved segment 122 to return to the first connecting portion 123. With this structure, when the slider 2 at the second position is driven to continue to move along the X direction, the slider 2 can reliably automatically return to the first position in the opposite direction of the X direction.

[0052] Please refer to the Figure 3 and Figure 6 The annular groove 12 is provided with a raised step 125 at the first connecting portion 123. The step 125 makes the end of the curved segment 122 higher than the straight segment 121, so that when the slider 2 moves from the first position to the second position, the raised portion 321 on the swing arm 3 will not mistakenly enter the curved segment 122, ensuring that the raised portion 321 on the swing arm 3 can reliably slide straight along the X direction to the predetermined position, thereby improving the stability and reliability of the locking mechanism in locking the preset object.

[0053] Please refer to the Figure 3 and Figure 6The elastic component 5 is preferably arranged on the side of the straight segment 121 facing away from the curved segment 122. The elastic component 5 specifically includes an elastic body 51 and a positioning pin 52. The elastic body 51 is preferably a spring. The elastic body 51 is connected between the fixing seat 1 and the positioning pin 52. The second end 32 of the swing arm 3 is provided with a card slot 322. The positioning pin 52 is limited on the fixing seat 1 and is subjected to the elastic force of the elastic body 51 for inserting into the card slot 322 of the swing arm 3. When the protrusion 321 of the swing arm 3 moves to the second connecting point 124, the positioning pin 52 is subjected to the elastic force of the elastic body 51 to apply the above-mentioned force to the second end 32 of the swing arm 3 along the second direction. The side of the positioning pin 52 facing the slider 2 is preferably provided with a slope 521. When the swing arm 3 moves along the X direction, the swing arm 3 can push the positioning pin 52 to retract by squeezing the slope 521. When the second end 32 of the swing arm 3 moves to a predetermined position, the positioning pin 52 will be inserted into the slot 322 of the swing arm 3 to restrict the second end 32 of the swing arm 3, thereby realizing the function of locking the slider 2.

[0054] Please also refer to Figure 2 、 Figure 5 、 Figure 7 and Figure 8 , a driving groove 61 is provided on both buckle plates 6, and two protrusions 23 are provided on the slider 2. The protrusions 23 are simultaneously penetrated in the guide groove 11 of the fixed seat 1 and in a corresponding driving groove 61, so that the slider 2 squeezes the groove wall of the driving groove 61 through the protrusions 23 to drive the two buckle plates 6 to rotate relative to the fixed seat 1. This linkage method makes the locking mechanism smaller in size, more compact in structure, and simpler to assemble.

[0055] See also Figure 9 The locking mechanism of this embodiment also includes an upper shell 7 and a lower shell 8, which are joined together to form a mounting cavity. The aforementioned fixing seat 1, slider 2, swing arm 3, elastic member 4, elastic assembly 5, and two pinch plates 6 are all housed within this mounting cavity, thereby preventing the ingress of foreign matter and dust, thereby extending the service life of the locking mechanism. Furthermore, a notch 71 is provided in the upper shell 7, exposing the slider 2 and the two pinch plates 6. This notch 71 allows a predetermined object to push the slider 2 through the notch 71 and be locked by the two pinch plates 6.

[0056] Please also refer to Figure 4 、 Figure 5 、 Figure 7 and Figure 9The fixing base 1 is provided with a through-hole 14, and the slider 2 is inserted into this hole 14. In fact, the slider 2 includes a first portion 21 extending upward relative to the hole 14 and a second portion 22 extending downward relative to the hole 14. The elastic member 4 is provided at the top of the fixing base 1 and abuts against the first portion 21 of the slider 2. Two pinch plates 6 are also provided at the top of the fixing base 1. The swing arm 3 and the elastic component 5 are both located at the bottom of the fixing base 1, and the first end 31 of the swing arm 3 is rotatably connected to the second portion 22 of the slider 2. The aforementioned protrusion 23 is provided on the second portion 22 of the slider 2, so that the second portion 22 of the slider 2 is slidably connected to the fixing base 1 along the X direction. Through such a structural layout, the swing arm 3 and the elastic component 5 can be hidden at the bottom of the fixing base 1, further preventing foreign matter or dust from entering the swing arm 3 or the elastic component 5 through the notch 71, thereby further extending the service life of the locking mechanism.

[0057] In addition to being used in door stops, the locking mechanism of this solution can also be expanded to other fields involving self-locking and self-opening structures, such as POS machine paper bin covers and battery cover structures, or some base structures that need to be locked, or jigs used in production, etc.

[0058] Please also refer to Figure 10 and Figure 11 When the locking mechanism is applied to the door suction, in addition to the locking mechanism, the door suction preferably also includes a connecting member 10. The connecting member 10 is used to be fixed to the bottom of the door. The connecting member 10 is also used to directly push the slider 2 from the first position to the second position. When the two buckle plates 6 approach each other to lock the connecting member 10, the door is in a locked state.

[0059] The above is merely a preferred embodiment of the present invention and specifically describes the technical principles of the present invention. These descriptions are intended only to explain the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be imagined by those skilled in the art without inventive effort, shall be included within the scope of protection of the present invention.

Claims

1. A locking mechanism, characterized in that: It includes a fixed seat, a slider, a swing arm, an elastic member, an elastic component and two gusset plates; The slider is slidably connected to the fixing seat along a first direction, the two pinch plates are respectively rotatably connected to the fixing seat, the slider is respectively connected to the two pinch plates, and when the slider slides relative to the fixing seat, it has a first position in sequence along the first direction so that the two pinch plates are separated from each other and a second position so that the two pinch plates are close to each other, and the close proximity of the two pinch plates is used to lock a preset object; the elastic member is connected between the slider and the fixing seat and is used to drive the slider to move from the second position to the first position; The first end of the swing arm is rotatably connected to the slider, and the second end of the swing arm away from the first end is limited to the fixed seat and moves relative to the fixed seat in at least a circular path; the elastic component is connected to the fixed seat, and when the slider is in the second position, the elastic component is used to lock the position of the second end of the swing arm, and when the slider continues to move from the second position along the first direction to a predetermined position, the elastic component is also used to apply a force to the second end of the swing arm in a second direction, and the second direction is not collinear with the first direction, so that the second end of the swing arm can move around the circular path to the initial position under the combined action of the elastic force of the elastic member and the force; The fixing seat is provided with an annular groove connected end to end, the annular groove having the annular path, the second end of the swing arm is provided with a raised portion, the raised portion is limited to the annular groove; The annular groove includes a straight segment and a curved segment, one end of the curved segment is connected to one end of the straight segment to form a first connection point, the other end of the curved segment is connected to the other end of the straight segment to form a second connection point, and the straight segment extends along the first direction; When the slider moves from the first position to the second position along the first direction, the protrusion passes through the first connecting point and always moves in a straight line along the straight segment; and when the protrusion is located at the second connecting point, the second end of the swing arm is freed from the restriction of the elastic component and is subjected to the force of the elastic component in the second direction to enter the curved segment.

2. The locking mechanism according to claim 1, wherein: The annular groove is provided with a raised step at the first connecting portion, and the step makes the end of the curved segment higher than the straight segment.

3. The locking mechanism according to claim 1, wherein: The elastic component is arranged on the side of the straight segment facing away from the curved segment. The elastic component includes an elastomer and a positioning pin. The elastomer is connected between the fixing seat and the positioning pin. A slot is provided at the second end of the swing arm. The positioning pin is limited on the fixing seat and is inserted into the slot by the elastic force of the elastomer. When the protrusion moves to the second connecting point, the positioning pin applies the force to the second end of the swing arm along the second direction under the elastic force of the elastomer.

4. The locking mechanism according to any one of claims 1 to 3, wherein: The fixing seat is provided with a guide groove extending along the first direction, the buckle plates are provided with driving grooves, and the slider is provided with a protrusion, which is simultaneously penetrated into the guide groove and the driving groove. The slider drives the buckle plate to rotate relative to the fixing seat by squeezing the groove wall of the driving groove through the protrusion.

5. The locking mechanism according to any one of claims 1 to 3, characterized in that: The locking mechanism also includes an upper shell and a lower shell, and the upper shell and the lower shell are spliced ​​together to form an installation cavity. The fixing seat, the slider, the swing arm, the elastic member, the elastic assembly and the two buckle plates are all accommodated in the installation cavity. The upper shell is provided with a notch, and the notch is used to expose the slider and the two buckle plates.

6. The locking mechanism according to claim 5, wherein: The fixing seat is provided with a longitudinal avoidance hole, the slider is passed through the avoidance hole, the slider includes a first part that passes upward relative to the avoidance hole and a second part that passes downward relative to the avoidance hole, the elastic member is provided at the top of the fixing seat and abuts against the first part, the two gusset plates are also provided at the top of the fixing seat, the swing arm and the elastic component are both located at the bottom of the fixing seat, the first end of the swing arm is rotatably connected to the second part, and the second part is slidably connected to the fixing seat along the first direction.

7. A door stopper, characterized in that: The invention comprises the locking mechanism according to any one of claims 1 to 6.

8. The door stopper according to claim 7, characterized in that: The door stopper also includes a connecting piece, which is used to be fixed at the bottom of the door. The connecting piece is used to push the slider from the first position to the second position, and the two buckle plates are brought close to each other to lock the connecting piece.

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