Rotary arm type protective lock

Abstract

The utility model discloses a tumbler type protective lock which comprises a first lock piece, a second lock piece, a connecting mechanism and a locking mechanism, and the connecting mechanism is connected between a pivot arm of the first lock piece and a rotating shaft portion of the second lock piece so that the second lock piece can rotate between a first state and a second state. The connecting mechanism acts in the axial direction to drive the first proximity lock piece and the second proximity lock piece of the locking mechanism to be connected or separated, and therefore rotation of the second lock piece is locked or unlocked. According to the protective lock, the oven door can be locked at the completely-closed position, the structure is simplified by integrating a locking structure on the lock body and the connecting mechanism, and unlocking is carried out through simultaneous operation on the two sides so that operation of children can be avoided.

Description

Technical Field

[0001] This utility model belongs to the field of child safety locks, specifically relating to a rotary arm safety lock that can be used to lock oven doors, etc. Background Technology

[0002] As people's living standards improve, furniture and home appliances are becoming increasingly common in homes. While bringing convenience, these can also create safety hazards. For example, children may operate the doors of furniture or appliances out of curiosity or to imitate adults. For instance, ovens often have open doors, and the heat they generate during operation could burn children. Furthermore, fingers could be pinched when closing the door.

[0003] Therefore, it is necessary to develop protective locks to prevent children from being harmed by unauthorized operation. For example, Chinese utility model CN213898513U discloses a sliding protective lock that locks or unlocks an oven by rotating the lock body 1 relative to the rotating base 2. Another example is a sliding protective lock that achieves locking or unlocking by sliding the lock body 100 relative to the base 200.

[0004] However, existing safety locks are easy to unlock, and children may try to open the oven door multiple times or imitate adult operation; furthermore, the safety locks are also difficult to lock the oven door in the fully locked position, leaving very little room for opening. In addition, the oven door cannot be opened to a predetermined small extent for ventilation. Utility Model Content

[0005] The purpose of this invention is to provide a rotary arm protective lock that can lock the oven door in a fully locked position while also allowing the oven door to open for ventilation.

[0006] To achieve the above objectives, the present invention adopts the following solution:

[0007] A rotary arm type protective lock includes a first locking member and a second locking member. The second locking member includes a rotating shaft and a rotating arm, and is pivotally connected to the first locking member. Thus, the rotation of the rotating arm around its axis locks components such as oven doors. Compared to sliding locks and rotary locks, the locking position of the component to be protected can be adjusted as needed, allowing for complete locking or opening for a small distance for ventilation and heat dissipation.

[0008] The swivel-arm protective lock also includes a connecting mechanism and a locking mechanism. The locking mechanism includes a first proximity lock and a second proximity lock. The first proximity lock and the second proximity lock are respectively disposed on the connecting mechanism and the first lock or the second lock. That is, when the first proximity lock is disposed on the connecting mechanism, the second proximity lock is disposed on the first lock or the second lock (one of the two), and when the second proximity lock is disposed on the connecting mechanism, the first proximity lock is disposed on the first lock or the second lock.

[0009] Furthermore, the connecting mechanism is connected between the pivot arm of the first locking member and the rotating shaft of the second locking member, so that the second locking member can be rotated between a first state and a second state. The connecting mechanism moves axially to drive the first access locking member to engage or disengage with the second access locking member, thereby locking or unlocking the rotation of the second locking member.

[0010] By adopting this technical solution, in addition to allowing for adjustment of the specific position of the locking state as needed, the structure can be simplified and child-proof operation can be prevented.

[0011] Preferably, the connecting mechanism includes a first connecting member and a second connecting member, which are axially telescopically movable (or, as can be understood, each of the first and second connecting members can independently telescopically move along the axial direction). The second connecting member is non-rotatably fitted inside the first connecting member. The second proximity lock includes a first locking member and a second locking member, which are respectively disposed on the first and second connecting members, and the locking units of the first and second locking members are offset to allow the first proximity lock to engage with the first and second locking members alternately. The axially telescopical movable arrangement of the first and second connecting members can be independent, or one can telescopically move relative to the other first, followed by the other telescopically moving relative to the rotating shaft as a whole. Currently, this allows the two connecting members to perform independent telescopic movements to meet the requirements of subsequent sequential engagement (such as meshing), avoiding the inability to achieve the double meshing function if the two connecting members telescopically move synchronously.

[0012] Preferably, the first proximity lock is composed of a third locking member. The first locking member, the second locking member, and the third locking member are all toothed members. When the third locking member engages with one of the first locking member and the second locking member, the other is abutted to perform axial retraction. For example, at a certain position, the third locking member is engaged with the first locking member. Due to the misalignment of the first and second locking members, the teeth of the second locking member are in contact with the teeth of the third locking member. If the first and second connecting members cannot retract independently, structural interference will occur, leading to damage to the teeth or the third locking member failing to engage with the first locking member. However, in this invention, because of the independently retractable structure, when the teeth of the second and third locking members are in contact, the second connecting member will retract inward (relative to the first connecting member) to ensure that the engagement of the third and first locking members is unaffected. Similarly, when the third locking member engages with the second locking member, the first locking member retracts along with the first connecting member. Therefore, this structural design allows the second locking member to have twice the number of locking positions within the same size range, achieving more precise and smaller-scale rotational adjustment.

[0013] In some embodiments, the first connector is non-rotatably disposed within the pivot portion, and the first proximity lock is fixed to the pivot arm. Preferably, a shaft passes through the pivot arm and the connecting mechanism, and the shaft is axially displaceable to drive the connecting mechanism to axially displace.

[0014] In other embodiments, the first connecting member is non-rotatably connected to the pivot arm, and the first proximity lock is fixedly connected to or integrally formed with the rotating shaft. Preferably, the shaft is non-rotatably inserted through the pivot arm and the connecting mechanism, and the shaft is axially movable to drive the connecting mechanism to axially displace. Preferably, the shaft includes a second shaft, and the fifth limiting member of the second shaft is non-rotatably connected to the second connecting member, and the fourth limiting member is non-rotatably connected to the pivot arm. Preferably, an anti-rotation arm is fixedly connected to at least one side of the pivot hole, and the first proximity lock is disposed on the inner wall of the anti-rotation arm.

[0015] Preferably, the second connector and the first connector are respectively provided with a protrusion and a recess, so that the first connector and the second connector are non-rotatably connected.

[0016] Preferably, the toothed component includes a pair of meshing teeth, or a tooth and a tooth groove. These two sets of structures have the same principle but differ only in shape, and can achieve the same effect. The tooth can be a unidirectional tooth with one side as a limiting surface and the other as an inclined or curved surface to form a guiding surface, or it can be a "tooth" with limiting surfaces on both sides (this differs from the structural shape of teeth commonly considered in the prior art, but achieves the technical purpose of this utility model). In other words, a pair of teeth in this utility model generally refers to a pair of components that can engage with each other.

[0017] Preferably, at least one of the first and second proximity locks uses a one-way tooth, such that the opening rotation of the second lock is locked and the locking rotation is allowed.

[0018] Preferably, the number of the first, second, and third locking components are 2-4 each, and they are evenly distributed along the circumference. Here, "number" refers to the total number of each component, not the number of teeth in each locking component. Since they engage in time-sharing pairs, setting two or more and evenly distributing them ensures stable locking and prevents damage or failure of components due to uneven locking force. The specific number can be set as needed.

[0019] Preferably, the protective lock further includes a first elastic element and a second elastic element, wherein the first elastic element acts on the first connector to provide an outward tendency, and the second elastic element acts on the second connector to provide an outward tendency.

[0020] Preferably, the locking mechanism continuously locks at different positions within the rotation range of the second locking member or locks only in the first and second states.

[0021] Preferably, the first connector includes a second body and a second cavity formed within the second body, the periphery of the second cavity being provided with a first convex wall member and a first positioning cavity; the second connector includes a third body and a second convex wall member disposed around the third body, a second positioning cavity being formed between the two second convex wall members; the third body is sleeved within the second cavity and the second convex wall member is sleeved within the first positioning cavity.

[0022] Furthermore, the first locking member is disposed on the top surface of the first convex wall member, and the second locking member is disposed on the top surface of the second convex wall member.

[0023] In some embodiments, there are two connecting mechanisms symmetrically arranged on both sides of the rotating shaft. A first limiting member is provided on the side wall or bottom wall of the rotating shaft, and a second limiting member is correspondingly provided on the outer side wall or bottom end of the first connecting member. Preferably, the first locking member includes a housing and a core member disposed within the housing, and the first proximity locking member is disposed on the core member.

[0024] In other embodiments, the connecting mechanism has a third connecting member located on one side of the rotating shaft portion, and a third connecting member located on the other side of the rotating shaft portion. The third connecting member is rotatably disposed within the rotating shaft portion, such that both sides of the rotating shaft portion are rotatably supported. Preferably, a third limiting member is provided on the pivot arm, and a fourth limiting member is provided on the second shaft member. The fourth limiting member is engaged with the third limiting member, such that the first connecting member is non-rotatably connected to the pivot arm. Preferably, the third connecting member is non-rotatably connected to the first locking member or the connecting mechanism.

[0025] In some other embodiments, the connecting mechanism is a single-tooth connector, which is non-rotatably disposed in the first cavity, and the third shaft of the single-tooth connector is rotatably disposed in the pivot hole of the pivot arm. The second proximity lock is disposed on the outer end face of the single-tooth connector, and the first proximity lock is disposed on the inner wall of the pivot arm.

[0026] Preferably, the single-tooth connector is positioned by protrusions and concave parts respectively disposed on its side wall and the side wall of the pivot hole or its bottom wall and the bottom wall of the pivot hole, so that the single-tooth connector is not rotatable.

[0027] Preferably, the first proximity lock is composed of a plurality of toothed grooves arranged in a circumferential array around the pivot hole, and the second proximity lock is composed of a plurality of toothed blocks arranged around the periphery of the third shaft.

[0028] There are two single-tooth connectors, which are respectively located on both sides of the second lock. An elastic element is provided between the single-tooth connector and the second lock, or an elastic element is provided between the two single-tooth connectors.

[0029] Preferably, the single-tooth connector is an integral component.

[0030] Preferably, the locking mechanism continuously locks at different positions within the rotation range of the second locking member or locks only in the first and second states.

[0031] Preferably, the locking mechanism provides unidirectional or bidirectional locking of the rotation of the second locking member.

[0032] This utility model has at least the following beneficial effects:

[0033] 1. The second locking member rotates along a pivot parallel to its bottom surface, so that the second locking member can lock the oven door and other locking components in a fully locked position, and can also open to a predetermined angle for heat dissipation by adjusting the rotation angle of the second locking member, thereby enriching the function of the protective lock and diversifying the applicable scenarios.

[0034] 2. The safety lock is unlocked by pressing on both sides, and the second locking element must be turned while the pressure is maintained, which reduces the possibility of children operating it and improves safety.

[0035] 3. The locking mechanism is integrated into the first and second locking and connecting mechanisms, which is easy to manufacture and assemble, and reduces costs.

[0036] 4. By setting a first locking component and a second locking component, the second locking component can be locked with twice the number of rotation steps within the same space, achieving twice the degree of adjustment on the same product, thus providing better adaptability. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the protective lock in the closed state according to Embodiment 1 of this utility model;

[0038] Figure 2 yes Figure 1 The schematic diagram of the protective lock in the embodiment when it is switched to the open state shows that the second locking member rotates along the pivot axis from... Figure 1 It is formed by pivoting along the path shown by the double arrows in the diagram;

[0039] Figure 3 yes Figure 1 An exploded view of the protective lock in the embodiment;

[0040] Figure 4 yes Figure 1 An exploded view of the structure of the first locking component in the embodiment;

[0041] Figure 5 yes Figure 4 Enlarged structural diagram at point A;

[0042] Figure 6 yes Figure 4 Enlarged structural diagram at point B;

[0043] Figure 7 yes Figure 1 An exploded view of the structure of the connection mechanism between the second locking member and the left and right sides in the embodiment;

[0044] Figure 8 yes Figure 7 An exploded view of the structure of the second locking member, the connecting mechanism, and the first shaft member;

[0045] Figure 9 Figure 7 Exploded view of the structure of the first and second connecting parts

[0046] Figure 10 yes Figure 1 The side view of the connecting mechanism installed behind the second locking member in the embodiment, wherein a portion of the second locking member is not shown;

[0047] Figure 11 This is an exploded view of the protective lock according to Embodiment 2 of this utility model;

[0048] Figure 12 yes Figure 11 An exploded view of the structure of the second locking member, the connecting mechanism, and the third connecting member in the embodiment;

[0049] Figure 13 yes Figure 11 An exploded view of the connecting mechanism and the third connecting member in the embodiment;

[0050] Figure 14 This is an exploded view of the protective lock according to Embodiment 3 of this utility model;

[0051] Figure 15 yes Figure 14 A schematic diagram and a partially enlarged schematic diagram of the first locking component in the embodiment;

[0052] Figure 16 yes Figure 14 An exploded view of the structure of the second locking member and the single-tooth connecting member in the embodiment.

[0053] in,

[0054] Protective lock 100, first locking element 10, second locking element 21, connecting mechanism 30, locking mechanism 40, first connecting element 31, second connecting element 32, first proximity lock element 41, second proximity lock element 42, shaft element 12.

[0055] First main body 101, pivot arm 102, pivot hole 103, pivot cavity 104, pivot axis 105, third limiting member 107.

[0056] Shell component 111, core component 112, core base component 113, core arm component 114, spindle hole 115, first clamping component 116.

[0057] First shaft component 120, first shaft portion 121, second shaft portion 122, second clamping component 123.

[0058] Second shaft component 130, fifth limiting component 131, fourth limiting component 132, cross hole 133.

[0059] Third locking component 201, first locking component 202, second locking component 203, toothed cavity 204, first toothed wall 205, second toothed wall 206.

[0060] Rotating shaft 211, rotating arm 212, first cavity 213, first limiting member 214, second limiting member 215.

[0061] Second body 311, second cavity 312, first convex wall member 313, first positioning cavity 314.

[0062] The third main body 321, the second convex wall component 322, and the second positioning cavity 323.

[0063] Protrusion 106, third connector 33, connecting hole 301, cylindrical surface 302, fourth limiting member 132, anti-rotation arm 216, fourth main body 331, operating member 332, pin 333, guide member 334, guide surface 335.

[0064] Gear groove 108, single tooth connector 35, fifth body 351, third shaft 352, tooth block 353, contact end 217. Detailed Implementation

[0065] To enable those skilled in the art to better understand this utility model and to more clearly define the scope of protection claimed by this utility model, the present utility model will be described in detail below with reference to certain specific embodiments.

[0066] A rotary arm type protective lock includes a first locking member 10 and a second locking member 21. The second locking member 21 includes a pivot portion 211 and a rotating arm 212, and the second locking member 21 is pivotally connected to the first locking member 10. The protective lock also includes a connecting mechanism 30 and a locking mechanism 40. The locking mechanism 40 includes a first approach locking member 41 and a second approach locking member 42. One of the first approach locking member 41 and the second approach locking member 42 is disposed on the connecting mechanism 30, and the other is disposed on one of the first locking member 10 and the second locking member 21.

[0067] The connecting mechanism 30 is connected between the pivot arm 102 of the first locking member 10 and the rotating shaft 211 of the second locking member 21, so that the second locking member 21 is rotatably configured between the first state and the second state. The connecting mechanism 30 moves and displaces along the pivot axis 105 to drive the first proximity locking member 41 and the second proximity locking member 42 to engage or disengage, thereby locking or unlocking the rotation of the second locking member 21.

[0068] Example 1

[0069] A rotating arm safety lock can be installed on an oven as an oven lock to prevent children from opening the oven door and avoid injuries such as burns and pinched fingers.

[0070] like Figure 1 , 2 As shown, the protective lock 100 is generally composed of a first locking member 10 and a second locking member 21. The first locking member 10 is used to be installed on the oven, and the second locking member 21 is rotatably connected to the first locking member 10. Thus, the oven door can be locked or unlocked by pivoting the second locking member 21, forming a first state and a second state of the protective lock. The first state is used to lock the oven door, and the second state is used to unlock it. The rotation angle of the second locking member 21 between the first state and the second state can be set as needed, for example, it can be 60°, 90° or other angles.

[0071] The first locking member 10 is generally U-shaped (i.e., composed of three interconnected sides), including a first main body 101 and two pivot arms 102. The pivot arms 102 are located at both ends of the first main body 101 to form a U-shape. Pivot holes 103 are correspondingly provided on the two pivot arms 102. After the shaft member 12 passes through the pivot holes 103, the second locking member 21 is pivotally mounted on the first locking member 10, so that the second locking member 21 can be pivotally mounted on the first locking member 10 around the pivot axis 105. The second locking member 21 can... Figure 1 The locked state (i.e., the second state) and Figure 2 The pivoting motion between the shown open state (i.e., the first state) and the rotation path is as follows: Figure 2 As shown by the double-headed arrow.

[0072] like Figure 3 As shown, the second locking member 21 is installed on the first locking member 10 via the connecting mechanism 30. Specifically, the connecting mechanism 30 is inserted into the first cavity 213 of the second locking member 21 and the inner pivot hole 103 of the first locking member 10, thereby achieving the pivotal installation of the second locking member 21.

[0073] To lock the second locking member 21 in either the first or second state, maintaining it in either a locked or open state, the protective lock 100 further includes a locking mechanism 40 acting between the first locking member 10 and the second locking member 21. The locking mechanism 40 comprises a first proximity locking member 41 and a second proximity locking member 42 respectively disposed on the first locking member 10 and the second locking member 21. The second locking member 21 is pivotally locked or unlocked by the displacement of the first proximity locking member 41 and the second proximity locking member 42 along the pivot axis 105. When the first proximity locking member 41 and the second proximity locking member 42 approach each other, they engage, for example, like gears meshing.

[0074] In this embodiment, the first proximity lock 41 is disposed on the pivot arm 102, surrounding the periphery of the pivot hole 103, and the second proximity lock 42 is disposed at the corresponding position on the connecting mechanism 30. The connecting mechanism 30 is positioned and assembled in the first cavity 213 on the second lock 21 and is movable relative to the second lock 21 along the pivot axis 105, so that the connecting mechanism 30 can only move axially within the first cavity 213 and cannot rotate circumferentially. The positioning assembly refers to a limiting mechanism with circumferential rotation to prevent the connecting mechanism 30 from rotating.

[0075] For example, a first limiting member 214 is provided on the inner wall of the first cavity 213, and a second limiting member 215 is correspondingly provided on the outer wall of the connecting mechanism 30. The first limiting member 214 is a protrusion, and the second limiting member 215 is a concave part, so that the first limiting member 214 and the second limiting member 215 are in a concave-convex fit, thereby limiting the circumferential rotation of the connecting mechanism 30 relative to the first cavity 213 and preventing it from rotating. In other embodiments, concave-convex limiting mechanisms can also be provided on the bottom walls of the first cavity 213 and the connecting mechanism 30 respectively to limit the rotation of the connecting mechanism 30 through a concave-convex fit.

[0076] Therefore, when the second proximity lock 42 moves axially along the connecting mechanism 30, the second proximity lock 42 can approach or move away from the first proximity lock 41 to lock or unlock the locking mechanism 40.

[0077] like Figure 3 As shown, a pivot cavity 104 is formed between the two pivot arms 102 for the rotating shaft portion 211 of the second locking member 21 to be installed therein. The connecting mechanism 30 also includes a shaft 12. In this embodiment, the shaft 12 is composed of a first shaft 120. After assembly, the first shaft 120 passes through the pivot hole 103 of the pivot arm 102, and the first shaft 120 and the pivot hole 103 form a rotatable assembly to rotatably mount the second locking member 21 and the connecting mechanism 30 onto the first locking member 10. The second locking member 21 also includes a rotating arm 212 connected to or integrally formed with the rotating shaft portion 211. The rotating shaft portion 211 is used for pivotally mounting onto the first locking member 10, and the rotating arm 212 is used to prevent or allow the oven door to open.

[0078] The first shaft 120 serves both as a rotating connection and as a means to drive the connecting mechanism 30 to move within the first cavity 213, thereby controlling the locking mechanism 40 to switch between a locked and unlocked state. When the connecting mechanism 30 is positioned close to the pivot arm 102, the locking mechanism 40 is in a locked state; when the connecting mechanism 30 is pushed away from the pivot arm 102 by the first shaft 120, the second proximity lock 42 separates from the first proximity lock 41, causing the locking mechanism 40 to switch to a locked state.

[0079] In this embodiment, the first locking member 10 is composed of a shell member 111 and a core member 112, as follows: Figure 4 As shown, the shell 111 has a cavity for at least part of the core 112 to be installed therein. The core 112 serves as the main functional and structural component of the first locking member 10, realizing the function of the first locking member 10 and mainly satisfying the structural strength. The shell 111 is used to shape the appearance of the first locking member 10 and to assist in satisfying the structural strength, making the structural design, appearance design and material selection of the first locking member 10 more diversified. Of course, in other embodiments, the first locking member 10 can also be made by integral molding.

[0080] The core component 112 has a core bottom component 113 and two core arm components 114 located on the same side at both ends of the core bottom component 113. The core component 112 is inserted into a cavity within the shell component 111 and engages with the shell component 111. The bottom surface of the core bottom component 113 of the core component 112 forms the bottom surface of the first locking component 10 for fixing to the oven, for example, by adhesive bonding. The first proximity locking component 41 is provided on the inner wall of the core arm component 114, and the two core arm components 114 have spindle holes 115 passing through them. The first proximity locking component 41 is arranged around the periphery of the spindle holes 115.

[0081] like Figure 5 As shown, the first proximity lock 41 includes a plurality of third locking members 201 arranged in an array along the circumferential direction. Each third locking member 201 is spaced apart to form a toothed cavity 204 between adjacent third locking members 201. The two sides of the third locking member 201 are respectively provided with a first toothed wall 205 and a second toothed wall 206. The first toothed wall 205 is a limiting surface that is substantially perpendicular to the inner wall surface of the core arm member 114. The second toothed wall 206 is a guide surface that is inclined relative to the inner wall surface of the core arm member 114. The first toothed wall 205 and the second toothed wall 206 only need to satisfy their respective functions and are specifically set as needed.

[0082] Preferably, the first locking member 202, the second locking member 203, and the third locking member 201 are all composed of toothed members, that is, they include at least one toothed member, so as to engage in a meshing manner.

[0083] Therefore, in this embodiment, the first proximity lock 41 is configured as a one-way locking mechanism. When the second lock 21 rotates from the open state to the locked state, the locking mechanism 40 does not lock, but when it rotates from the locked state to the open state, it is locked by the locking mechanism 40. It can only be operated after the locking mechanism 40 is unlocked.

[0084] In this embodiment, a first locking member 116 is provided on the pivot arm 102, and a second locking member 123 is correspondingly provided on the first shaft member 120. The first locking member 116 and the second locking member 123 abut against each other to prevent the first shaft member 120 from disengaging from the pivot hole 103. The first locking member 116 is preferably provided on the core arm member 114, such as... Figure 6 As shown.

[0085] like Figure 8 As shown, the first shaft member 120 includes a first shaft portion 121 and a second shaft portion 122 extending from one side of the first shaft portion 121. The first shaft portion 121 is used to pass through and be installed in the pivot hole 103, and the second shaft portion 122 is used to pass through the connecting hole 301 of the connecting mechanism 30. In this embodiment, the second shaft portion 122 can rotate freely with respect to the connecting mechanism 30.

[0086] like Figure 7 As shown, a connecting mechanism 30 is provided on each of the left and right sides of the second locking member 21. A pivot portion 211 can be provided on each side of the second locking member 21, and an elastic element, such as a return spring, can be provided between each connecting mechanism 30 and the bottom wall of the pivot portion 211 to ensure that the connecting mechanism 30 is initially in the extended position, i.e., the locking mechanism 40 is in the locked state. In other embodiments, the second locking member 21 may have a pivot portion 211 that extends through both sides, and a return spring can be provided between the two connecting mechanisms 30.

[0087] like Figure 7-9 As shown, the connecting mechanism 30 includes a first connecting member 31 and a second connecting member 32. The second connecting member 32 is sleeved inside the first connecting member 31, and the first connecting member 31 and the second connecting member 32 are independently and axially telescopically movable. The first connector 31 includes a second body 311 and a second cavity 312 formed within the second body 311. The second connector 32 is at least partially fitted and accommodated within the second cavity 312 and is positioned (i.e., cannot rotate relative to it). A first convex wall 313 and a first positioning cavity 314 are provided on the outer periphery of the second cavity 312 of the first connector 31 (i.e., the radial outer side of the second cavity 312). The second connector 32 includes a third body 321 and a second convex wall 322 and a second positioning cavity 323 disposed around the third body 321. The first convex wall 313 and the second positioning cavity 323, and the second convex wall 322 and the first positioning cavity 314 are correspondingly arranged (the shape of the missing part inside the first connector 31 is approximately complementary to the outer contour shape of the second connector 32, so as to allow the second connector 32 to be fitted within the first connector 31). Therefore, the second connector 32 and the first connector 31 rotate together. The second convex wall 322 and the first positioning cavity 314 constitute a second rotation-limiting structure.

[0088] In this embodiment, a first return spring is specifically provided between the first connecting member 31 and the bottom wall of the rotating shaft portion 211 to ensure that the connecting mechanism 30 is initially in the extended position. A second return spring is provided between the second connecting member 32 and the first connecting member 31 to provide an outward force so that the first connecting member 31 and the second connecting member 32 can each independently maintain their extended state. In other embodiments, the first connecting member 31 and the second connecting member 32 may also each be maintained in the extended state by a return spring.

[0089] The second proximity lock 42 includes a first locking member and a second locking member. The first locking member is disposed on the end face of the first connecting member 31, more specifically on the first protruding wall member 313, and the second locking member is disposed on the end face of the second connecting member 32, more specifically on the second protruding wall member 322. Furthermore, the locking units of the first and second locking members are offset, allowing the first proximity lock 41 to engage with both the first and second locking members alternately. Preferably, the locking units of the first and second locking members are offset by half a rotation angle in the circumferential direction, such that when the first proximity lock 41 engages with the locking unit of one of the first and second locking members, the locking unit of the other lock abuts against and retracts from the locking unit of the first proximity lock 41. For example, when the third locking member 201 engages with the first locking member 202, the second locking member 203 abuts against the third locking member 201, causing the second connecting member 32 to retract slightly. Similarly, when the third locking member 201 engages with the second locking member 203, the first locking member 202 abuts against the third locking member 201, causing the first connecting member 31 to retract slightly.

[0090] The connecting hole 301 is provided on the third body 321 and the second body 311, and its size is suitable for the second shaft portion 122 to pass through. An axially extending groove is provided on the outer wall of the first connecting member 31 to serve as a second limiting member 215, so that the first connecting member 31 is non-rotatably installed in the first cavity 213. Therefore, the first limiting member 214 and the second limiting member 215 constitute a first rotation-limiting structure.

[0091] like Figure 7-10 As shown, in addition to being non-rotatably sleeved, the first connecting member 31 and the second connecting member 32 are respectively provided with a first locking member 202 and a second locking member 203. The first locking member 202 and the second locking member 203 can both engage with the third locking member 201 in terms of structure. The first locking member 202 and the second locking member 203 are staggered so that the third locking member 201 engages with one of them. In other words, by staggering the angles of the first locking member 202 and the second locking member 203, the rotation limit angle / limit number of the third locking member 201 is doubled.

[0092] For example, in one embodiment, the first proximity lock 41 has 20 third locking members 201, meaning the angle difference between adjacent third locking members 201 is 18°. If only the first locking member 202 engages with it, the second lock 21 adjusts its locking position every 18°. With the structure of this embodiment, the angle difference between the first locking member 202 and the second locking member 203 remains 18°, but there is an overall 9° angular misalignment between the first locking member 202 and the second locking member 203. Therefore, the third locking member 201 can be locked every 9°, i.e., engaged with the first locking member 202 and the second locking member 203 respectively. Of course, the specific locking angle value can be set as needed, but structurally, this embodiment has double the number of locking positions.

[0093] Therefore, the first connecting member 31 and the second connecting member 32 are each axially telescopically movable, allowing them to engage or disengage with the third locking member 201 of the first approach locking member 41. The third locking member 201, the first locking member 202, and the second locking member 203 are each configured as a locking unit, with each tooth serving as a locking unit. In other embodiments, other locking structures may also be used, such as a combination of protrusions and grooves. Compared to other locking structures, locking by meshing between complementary two teeth or between tooth blocks and tooth grooves is smoother, noiseless, and supports unidirectional locking.

[0094] like Figure 4 , 9 As shown in Figure -10, in this embodiment, there are three of each of the first convex wall member 313 and the second convex wall member 322, which are evenly distributed along the circumference and staggered from each other. The third locking member 201 is a ring of teeth that surrounds the convex wall member 360°. Preferably, the first locking member 202 and the second locking member 203 each include a number of teeth and are disposed on the top surface of the corresponding convex wall member. The teeth are arranged in a spiral pattern and are arranged with the outer part larger than the inner part. The lateral angle of each tooth is 12°. The teeth of the first locking member 202 and the second locking member 203 are arranged at a 20° angle, so that the teeth of the two can be staggered and take turns meshing with the third locking member 201. The shape design of the teeth is conducive to improving meshing stability and enhancing meshing strength. Figure 10 The angle shown is exemplary. In other embodiments, the teeth of each locking member may also be configured in other specific ways to satisfy the misalignment.

[0095] The usage process of the protective lock 100 in this embodiment is as follows:

[0096] First, the protective lock 100 is fixed to a suitable position on the oven so that it can lock or unlock the oven door. Preferably, the bottom surface of the first locking member 10 is fixed by adhesive.

[0097] Next, the second locking member 21 rotates to the corresponding position of the locked state, and the second approach locking member 42 engages with the first approach locking member 41 to form the locking mechanism 40 in the locked state, thereby locking the second locking member 21 in the locked state.

[0098] Next, when it is necessary to release the protective lock 100 from locking the oven door, operate the first shaft 120 to press it inward, drive the first connector 31 and the second connector 32 to move inward, so that the second proximity lock 42 separates from the first proximity lock 41, the rotating arm of the second lock 21 returns to a freely rotatable state, and rotate the second lock 21 to the open state to allow the oven door to open.

[0099] As the second locking member 21 pivots, the third locking member 201 engages with the first locking member 202 and the second locking member 203 respectively, thereby providing a double gear adjustment function.

[0100] Furthermore, although in this embodiment the first proximity lock 41 and the second proximity lock 42 are arranged consecutively, so the second lock 21 is locked in both the locked and open states, in other embodiments the locking mechanism 40 may be arranged in the open and unlocked states so that it has a locking structure only in the two states.

[0101] Alternatively, in other embodiments, the locking mechanism 40 can be changed from the one-way locking structure of this embodiment to a two-way locking structure, that is, the guide surface can be changed to the limiting surface.

[0102] Example 2

[0103] like Figure 11-13 As shown, a protective lock 100 has a main structure similar to that of Embodiment 1, with the following differences: in Embodiment 1, the locking mechanism 40 is provided only on one side of the second lock member 21 instead of on both sides as in Embodiment 1; and secondly, the specific structures of the first lock member 10, the second lock member 21, the connecting mechanism 30, and the locking mechanism 40 have slight changes.

[0104] The differences between the two will be explained below based on Example 1.

[0105] like Figure 11 , 12 As shown, a cylindrical first cavity 213 is formed in the pivot portion 211 of the second locking member 21, and a cylindrical surface 302 is formed on the outer side wall of the connecting mechanism 30. This can also be understood as removing the first limiting member 214 and the second limiting member 215 in Embodiment 1.

[0106] In addition, an anti-rotation arm 216 is provided on one side of the first cavity 213. The anti-rotation arm 216 is provided with a through hole. The first approach lock 41 is provided on the inner wall of the anti-rotation arm 216. The first approach lock 41 is also composed of several third locking members 201 arranged in a circular direction. The third locking members 201 are preferably unidirectional teeth.

[0107] like Figure 11 As shown, the second locking member 21 is still installed on the first locking member 10 through the connecting mechanism 30, but the relative rotation relationship is different. In this embodiment, when the second locking member 21 pivots, the connecting mechanism 30 and the first locking member 10 do not rotate relative to each other, and the first cavity 213 of the second locking member 21 rotates on the cylindrical surface 302 of the connecting mechanism 30.

[0108] In this embodiment, the connecting mechanism 30 also includes a first connecting member 31 and a second connecting member 32 that are nested together. However, the detailed structure of the first connecting member 31 and the second connecting member 32 is different from all the changes in Embodiment 1. The difference is that, as before, a cylindrical surface 302 is formed on the outer wall of the first connecting member 31 instead of a second limiting member 215 as in Embodiment 1, and the circular connecting hole 301 in the middle of the second connecting member 32 is replaced by a cross hole 133.

[0109] The protective lock 100 also includes a third connector 33, on the outer side wall of which a cylindrical surface 302 is formed, such that the first connector 31 and the third connector 33 are rotatably assembled in the first cavity 213 and provide rotatable support to both sides of the first cavity 213, thereby ensuring the stable rotation of the second locking member 21. The third connector 33 is non-rotatably connected to the first locking member 10, thus allowing it to rotate relative to the second locking member 21.

[0110] like Figure 13 As shown, a return spring is provided between the first connecting member 31 and the third connecting member 33, so that the first proximity lock 41 provided on the first connecting member 31 and the second connecting member 32 initially maintains an extended tendency and engages with the second proximity lock 42 to lock. The second shaft 130 passes through the second connecting member 32, the first connecting member 31 and the third connecting member 33, and is non-rotatably connected to the second connecting member 32. A fourth limiting member 132 and a fifth limiting member 131 are provided on the second shaft 130 from the outside to the inside. The fifth limiting member 131 is a cross shaft portion, which passes through the cross hole 133 of the second connecting member 32 to form a non-rotatable connection. A third limiting member 107 is provided on the pivot arm 102 on the corresponding side of the first locking member 10. It is formed by a notch, which is defined by two protrusions 106 located on both sides of the notch. Figure 11 As shown, the fourth limiting member 132 passes through the third limiting member 107 so that the second shaft member 130 is non-rotatably connected to the first locking member 10.

[0111] In this embodiment, the third connecting member 33 is composed of a fourth body 331, an operating member 332, and a guide member 334. A third cavity (not shown in the figure) is formed on the outer side of the fourth body 331. There are two guide members 334, which are movably disposed in the third cavity in the vertical direction. A return spring is provided between the guide member 334 and the side wall of the third cavity. The operating member 332 is non-rotatably installed in the fourth body 331 and is movably disposed in the axial direction. The operating member 332 is provided with pins 333, which are inserted into both sides of the third cavity of the fourth body 331, forming a non-rotatable, only telescopic, movable mode. The pins 333 and the guide member 334 are respectively provided with guide surfaces 335, so that the telescopic displacement of the return spring is converted into the axial displacement of the operating member 332 through the guiding effect of the two guide surfaces 335. In other embodiments, the guide member 334 may be omitted, and the return spring may be disposed axially between the operating member 332 and the fourth body 331 to achieve the axial movable return of the operating member 332.

[0112] refer to Figure 13 As shown, the other structures of the first connector 31 and the second connector 32 are the same as in Embodiment 1, and the arrangement and structure of the second proximity lock 42 on the two connectors are also the same, so they will not be described again.

[0113] In other embodiments, the connecting mechanism 30 of this embodiment can be changed from the single-sided setting described above to a double-sided setting, that is, the third connecting member 33 in this embodiment is replaced by the connecting mechanism 30. The specific structure of the connecting mechanism 30 is the same as that of this embodiment and is symmetrically set (it can also be understood as copying the connecting mechanism 30 and setting it symmetrically). At the same time, the anti-rotation arm 216 and the first proximity lock 41 need to be set at the original open position on the other side of the first cavity 213. If anti-rotation arms 216 are provided on both sides of the first cavity 213, the two connecting mechanisms 30 and the return spring may not be able to be installed in the first cavity 213. This is why the connecting mechanism 30 is provided on one side in this embodiment. This problem can also be solved. The second locking member 21 or the rotating shaft 211 can be changed from the integral structure of this embodiment to a split structure, that is, the second locking member 21 or the rotating shaft 211 can be formed by two parts being connected to each other. Alternatively, the anti-rotation arm 216 on at least one side can be changed from being integrally formed at the side end of the first cavity 213 to being installed separately. In this way, the purpose of allowing the connecting mechanism 30 to be installed in the first cavity 213 can be achieved.

[0114] Example 3

[0115] A protective lock 100 has a main structure similar to that of Embodiment 1, but the difference is that: firstly, Embodiment 1 does not have a double-position function, and secondly, the specific structures of the first locking member 10 and the second locking member 21 have slight changes.

[0116] The differences between the two will be explained below based on Example 1.

[0117] like Figure 14 , 15 As shown, the first proximity lock 41 is provided on the inner wall of the pivot arm 102 of the first lock member 10. The first proximity lock 41 is composed of a plurality of circumferentially arrayed tooth grooves 108 recessed on the surface of the pivot arm 102. Each tooth groove 108 includes a first tooth wall 205 and a second tooth wall 206. Similar to Embodiment 1, this embodiment also constitutes a unidirectional tooth structure. In other embodiments, the second tooth wall 206 can be changed from a guide surface to a limiting surface that is the same as the first tooth wall 205 to form a bidirectional tooth structure.

[0118] like Figure 16 As shown, in this embodiment, the connecting mechanism 30 is constructed using a single-tooth connector 35. The single-tooth connector 35 has a fifth body 351. A groove is provided axially on the outer side wall of the fifth body 351 to serve as a second limiting member 215. A third shaft 352 protrudes from the outer end face of the fifth body 351. The third shaft 352 passes through the pivot hole 103 of the pivot arm 102 to form a rotatable connection. Several tooth blocks 353 arranged in a circumferential array are provided around the third shaft 352 as the second approach lock member 42, which is composed of several unidirectional teeth arranged in a circumferential array. The single-tooth connector 35 is axially telescopically movably disposed in the first cavity 213 of the second lock member 21. Preferably, a return spring is provided between the single-tooth connector 35 and the rotating shaft 211, or a return spring is provided between two single-tooth connectors 35.

[0119] In the initial state without external force, under the action of the return spring, the single-tooth connector 35 is positioned near the pivot arm 102, and the first proximity lock 41 engages with the second proximity lock 42 to lock the rotation of the second lock 21; pressing the third shaft 352 causes both single-tooth connectors 35 to move inward simultaneously, and the second proximity lock 42 separates from the first proximity lock 41 to release the locking mechanism 40, allowing the second lock 21 to pivot.

[0120] In this embodiment, the second locking member 21 is bent to one side to form an abutment end 217, such that when the second locking member 21 is in the locked state, the abutment end 217 is substantially flush with the bottom surface of the first locking member 10, thereby completely locking the oven door and the like.

[0121] In this embodiment, the locking mechanism 40 is continuously arranged in stages within the rotation range of the second lock member 21, so the second lock member 21 can be locked as needed within the rotation range according to the locking stage. In other embodiments, the locking mechanism 40 can also be arranged only at the open and locked states of the second lock member 21. For example, the toothed grooves 108 constituting the first proximity lock member 41 can be changed from a circumferential array to one or more toothed grooves 108 arranged only at the positions corresponding to the open and locked states of the second lock member 21. Providing a rotating connection structure and a locking structure on both sides of the second lock member 21 can improve the rotational stability and locking stability of the second lock member 21, increase the locking force, prevent children from forcibly pulling it open, and keep the second lock member 21 rotating while pressing on both sides can also reduce the possibility of children operating it and improve safety.

Claims

1. A rotary arm type protective lock, comprising a first locking member (10) and a second locking member (21), the second locking member (21) comprising a pivot portion (211) and a rotary arm (212), the second locking member (21) being pivotally connected to the first locking member (10); characterized in that, It also includes a connecting mechanism (30) and a locking mechanism (40), wherein the locking mechanism (40) includes a first proximity lock (41) and a second proximity lock (42), wherein the first proximity lock (41) and the second proximity lock (42) are respectively disposed on the connecting mechanism (30) and the first lock (10) or the second lock (21); The connecting mechanism (30) is connected between the pivot arm (102) of the first locking member (10) and the first cavity (213) of the rotating shaft (211), so that the second locking member (21) can switch between the first state and the second state; The connecting mechanism (30) moves axially to drive the first proximity lock (41) to engage or disengage with the second proximity lock (42) to lock or unlock the rotation of the second lock (21).

2. The rotary arm type protective lock according to claim 1, characterized in that, The connecting mechanism (30) includes a first connecting member (31) and a second connecting member (32). The first connecting member (31) and the second connecting member (32) are respectively axially telescopically movable, and the second connecting member (32) is non-rotatably sleeved inside the first connecting member (31). The second proximity lock (42) includes a first locking member (202) and a second locking member (203) respectively disposed on the first connector (31) and the second connector (32), and the first locking member (202) and the second locking member (203) are staggered so that the first proximity lock (41) engages with the first locking member (202) and the second locking member (203) alternately when it rotates.

3. The rotary arm type protective lock according to claim 2, characterized in that, The first approach lock (41) is composed of a third locking member (201). The first locking member (202), the second locking member (203) and the third locking member (201) are toothed members. When the third locking member (201) engages with one of the first locking member (202) and the second locking member (203) and abuts against the other, it retracts axially.

4. The rotary arm type protective lock according to claim 3, characterized in that, The first connector (31) is non-rotatably disposed in the pivot (211), and the first proximity lock (41) is fixed to the pivot arm (102); A shaft (12) passes through the pivot arm (102) and the connecting mechanism (30), and the shaft (12) moves axially to drive the connecting mechanism (30) to move axially.

5. The rotary arm type protective lock according to claim 3, characterized in that, The first connector (31) is non-rotatably connected to the pivot arm (102), and the first proximity lock (41) is fixed to or integrally formed with the rotating shaft (211); The shaft (12) is non-rotatably inserted through the pivot arm (102) and the connecting mechanism (30), and the shaft (12) moves axially to drive the connecting mechanism (30) to move axially.

6. The rotary arm type protective lock according to claim 5, characterized in that, The shaft (12) includes a second shaft (130), the fifth limiting member (131) of the second shaft (130) is non-rotatably connected to the second connecting member (32), and the fourth limiting member (132) of the second shaft (130) is non-rotatably connected to the pivot arm (102). An anti-rotation arm (216) is fixedly connected to at least one side of the first cavity (213), and the first access lock (41) is disposed on the inner wall of the anti-rotation arm (216).

7. The rotary arm type protective lock according to any one of claims 3-6, characterized in that, The second connector (32) and the first connector (31) are respectively provided with a protrusion and a concave part, so that the first connector (31) and the second connector (32) are non-rotatably connected; the toothed member includes a pair of teeth that mesh with each other, or a tooth and a tooth groove.

8. The rotary arm type protective lock according to claim 7, characterized in that, At least one of the first proximity lock (41) and the second proximity lock (42) includes a one-way tooth, such that the opening rotation of the second lock (21) is locked and the locking rotation is allowed; the number of the first locking member (202), the second locking member (203) and the third locking member (201) are 2-4 respectively and each is evenly distributed along the circumferential direction.

9. The rotary arm type protective lock according to claim 7, characterized in that, It also includes a first elastic element and a second elastic element, the first elastic element acting on the first connector (31) to provide an outward tendency, and the second elastic element acting on the second connector (32) to provide an outward tendency; The locking mechanism (40) locks continuously in different positions within the rotation range of the second locking member (21) or locks only in the first and second states.

10. The rotary arm type protective lock according to claim 7, characterized in that, The first connector (31) includes a second body (311) and a second cavity (312) formed in the second body (311). The second cavity (312) is provided with a first convex wall member (313) and a first positioning cavity (314) on its periphery. The second connector (32) includes a third body (321) and a second convex wall member (322) provided on the periphery of the third body (321). A second positioning cavity (323) is formed between the two second convex wall members (322). The third body (321) is sleeved in the second cavity (312) and the second convex wall member (322) is sleeved in the first positioning cavity (314).

11. The rotary arm type protective lock according to claim 10, characterized in that, The first locking member (202) is disposed on the top surface of the first convex wall member (313), and the second locking member (203) is disposed on the top surface of the second convex wall member (322).

12. The rotary arm type protective lock according to claim 4, characterized in that, The connecting mechanism (30) has two parts and is symmetrically arranged on both sides of the rotating shaft (211). A first limiting member (214) is provided on the side wall or bottom wall of the rotating shaft (211), and a second limiting member (215) is correspondingly provided on the outer side wall or bottom end of the first connecting member (31). The first locking member (10) includes a housing (111) and a core member (112) disposed within the housing (111), and the first proximity locking member (41) is disposed on the core member (112).

13. The rotary arm type protective lock according to claim 6, characterized in that, The connecting mechanism (30) has one on one side of the rotating shaft (211), and a third connecting member (33) is provided on the other side of the rotating shaft (211). The third connecting member (33) is rotatably disposed in the rotating shaft (211), so that both sides of the rotating shaft (211) are rotatably supported.

14. The rotary arm type protective lock according to claim 13, characterized in that, The pivot arm (102) is provided with a third limiting member (107), and the second shaft (130) is provided with a fourth limiting member (132). The fourth limiting member (132) is engaged with the third limiting member (107) so that the first connecting member (31) is non-rotatably connected to the pivot arm (102). The third connector (33) is non-rotatably connected to the first lock (10) or the connecting mechanism (30).

15. The rotary arm type protective lock according to claim 1, characterized in that, The second locking member (21) includes a pivot (211) and a rotating arm (212), wherein the pivot (211) has a first cavity (213); The connecting mechanism (30) is a single-tooth connector (35), which is non-rotatably disposed in the first cavity (213). The third shaft (352) of the single-tooth connector (35) is rotatably disposed in the pivot hole (103) of the pivot arm (102). The second proximity lock (42) is provided on the outer end face of the single tooth connector (35), and the first proximity lock (41) is provided on the inner wall of the pivot arm (102).

16. The rotary arm protective lock according to claim 15, characterized in that, The single-tooth connector (35) is positioned by protrusions and concave parts respectively disposed on its side wall and the side wall of the pivot hole (103) or its bottom wall and the bottom wall of the pivot hole (103), so that the single-tooth connector (35) is not rotatable. The first proximity lock (41) is composed of a plurality of toothed grooves (108) arranged in a circumferential array around the pivot hole (103), and the second proximity lock (42) is composed of a plurality of toothed blocks (353) arranged around the periphery of the third shaft (352). There are two single-tooth connectors (35) respectively located on both sides of the second locking member (21). An elastic element is provided between the single-tooth connector (35) and the second locking member (21) or between the two single-tooth connectors (35). The locking mechanism (40) locks continuously in different positions within the rotation range of the second locking member (21) or locks only in the first and second states. The locking mechanism (40) locks the rotation of the second locking member (21) in one direction or in two directions.

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