A self-locking mechanism

Abstract

The utility model belongs to the technical field of lockset, concretely relates to a self -locking mechanism, including mounting panel, the two hinged shafts of symmetry of mounting panel are respectively hinged with the lock piece with the lock hook, and the lock hook of two lock pieces is opposite and is located the head of lock piece, and the head of two lock pieces is provided with the hook or the hook elastic body of hooking respectively, be provided with the lock head on the hook or the column of elastic body that sets up and promotes two lock pieces to rotate each other close, be provided with the lock head, the lock head includes the lock rod and sets up the lock bolt that can be hooked in the lock hook of two lock pieces in the two sides symmetry of lock rod head outward bulge, the advantage is: two lock pieces of symmetry set up with the lock head cooperation automatic locking, make two lock pieces to the lock head symmetry exert force, the structure stress is even, two limit posts make two lock pieces be in the state of waiting to lock all the time, be convenient for automatic locking, simple structure, reliable work, low in production cost, can be used in telescopic sofa or telescopic bed locking in the unfolded state or / and the state of gathering.

Description

Technical Field

[0001] This utility model belongs to the field of lock technology, and in particular relates to a self-locking mechanism. Background Technology

[0002] For devices such as telescopic sofas and telescopic beds, pulling them out unfolds them, and pushing them back resets them. However, after being pushed back into place, telescopic sofas or telescopic beds sometimes automatically unfold under certain external forces because they lack a locking device, causing inconvenience to users. Summary of the Invention

[0003] The purpose of this invention is to provide a self-locking mechanism that can automatically lock.

[0004] The purpose of this utility model is to solve the following problem:

[0005] A self-locking mechanism includes a mounting plate. Two hinged shafts symmetrically arranged on the mounting plate are hinged to locking plates with locking hooks. The locking hooks of the two locking plates are arranged opposite each other and located at the heads of the locking plates. The heads of the two locking plates are respectively provided with hooks or columns for attaching elastic bodies. The hooks or columns are provided with elastic bodies that cause the two locking plates to rotate and move closer to each other. A lock head is provided. The lock head includes a locking rod and locking tongues symmetrically arranged on both sides of the head of the locking rod, protruding outwards and capable of being attached to the locking hooks of the two locking plates.

[0006] As a further optimization of the above technical solution, the elastic body is a tension spring, and the two ends of the tension spring are respectively hooked onto the hook or column.

[0007] As a further optimization of the above technical solution, the part where the lock hook engages with the lock tongue is a trapezoidal groove.

[0008] As a further optimization of the above technical solution, the latch is a trapezoidal body that matches the trapezoidal groove, and the latches on both sides form a trapezoidal body with a smooth transition to the lock head.

[0009] As a further optimization of the above technical solution, the corners of the trapezoidal body and / or trapezoidal groove are rounded.

[0010] As a further optimization of the above technical solution, the mounting plate is a right-angle plate formed by connecting one side of a horizontal plate and a vertical plate. The locking piece is hinged to the horizontal plate of the right-angle plate, and the vertical plate is provided with two or more mounting holes at intervals along the length direction of the vertical plate.

[0011] As a further optimization of the above technical solution, a first square tube or a first square rod is provided, and the mounting plate is fixed on the first square tube or the first square rod.

[0012] As a further optimization of the above technical solution, a second square tube or a second square rod is provided, and the locking rod is fixed on the second square tube or the second square rod.

[0013] As a further optimization of the above technical solution, a gasket is provided between the mounting plate and the locking piece, and the pin passes through the hinge hole on the locking piece and the mounting hole on the gasket to be fixed on the mounting plate.

[0014] As a further optimization of the above technical solution, limiting posts are respectively provided on the inner sides of the two locking plates to restrict the locking plates from rotating towards each other.

[0015] The advantages of this invention compared to the prior art are:

[0016] 1. The two symmetrically arranged locking plates of this utility model cooperate with a lock head in the middle to automatically lock, so that the two locking plates exert the same squeezing force on the lock head, apply force symmetrically, the structure is evenly stressed, and the service life is long.

[0017] 2. This utility model is equipped with two limiting posts, so that the two locking plates are always in the ready-to-lock state, which facilitates automatic locking.

[0018] 3. The locking tongues on both sides of this utility model form a trapezoidal shape with a smooth transition to the lock head, which is conducive to automatic locking.

[0019] 4. This utility model has a simple structure, reliable operation, and low production cost. It can be used to lock telescopic sofas or telescopic beds in the unfolded state and / or the retracted (folded) state. Attached Figure Description

[0020] Figure 1 This is an exploded view of this utility model.

[0021] Figure 2 This is a three-dimensional schematic diagram of the front of this utility model.

[0022] Figure 3 This is a three-dimensional schematic diagram of the back side of this utility model.

[0023] Figure 4 This is a schematic diagram of the installation position of the lock plate of this utility model on the mounting plate.

[0024] Figure 5 This is a schematic diagram showing the installation position of the lock head on the second square tube of this utility model. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figures 1-5 :

[0026] A self-locking mechanism includes a mounting plate 60. Two hinge shafts 80 symmetrically arranged on the mounting plate 60 are respectively hinged to locking plates 40 with locking hooks 41. The locking hooks 41 of the two locking plates 40 are arranged opposite each other and located at the head of the locking plates 40. The head of the two locking plates 40 is respectively provided with a hook or a post 82 for attaching an elastic body 30. The hook or post 82 is provided with an elastic body 30 that causes the two locking plates 40 to rotate and move closer to each other. A lock head 20 is provided. The lock head 20 includes a lock rod 21 and a locking tongue 22 symmetrically arranged on both sides of the head of the lock rod 21, which protrudes outward and can be attached to the locking hooks 41 of the two locking plates 40.

[0027] As a further optimization of the above technical solution, the elastic body 30 is a tension spring, and the two ends of the tension spring are respectively hooked onto the hook or column 82.

[0028] As a further optimization of the above technical solution, the locking hook 41 is attached to the locking tongue 22 in a trapezoidal groove 42.

[0029] As a further optimization of the above technical solution, the latch 22 is a trapezoidal body that matches the trapezoidal groove 42, and the latches 22 on both sides form a trapezoidal body with a smooth transition to the lock head 23, which is conducive to automatic locking.

[0030] As a further optimization of the above technical solution, the corner 24 of the trapezoidal body and / or trapezoidal groove 42 is smoothly transitioned so that when the power drives the lock head 20 away from the lock plate 40, the lock tongue 22 of the lock head 20 can overcome the elastic force of the elastic body 30 and unlock smoothly.

[0031] As a further optimization of the above technical solution, the mounting plate 60 is a right-angle plate formed by connecting one side of the horizontal plate 61 and the vertical plate 62. The locking piece 40 is hinged to the horizontal plate 61 of the right-angle plate, and the vertical plate 62 is provided with two or more mounting holes 63 at intervals along the length direction of the vertical plate 62.

[0032] As a further optimization of the above technical solution, a first square tube 70 or a first square rod is provided, and the mounting plate 60 is fixed to the first square tube 70 or the first square rod by bolts 83.

[0033] As a further optimization of the above technical solution, a second square tube 10 or a second square rod is provided, and the locking rod 21 is fixed on the second square tube 10 or the second square rod.

[0034] As a further optimization of the above technical solution, a shim 50 is provided between the mounting plate 60 and the locking piece 40. The pin 80 passes through the hinge hole 41 on the locking piece 40 and the mounting hole 51 on the shim 50 and is fixed on the mounting plate 60. The purpose of providing the shim 50 is to facilitate the rotation of the locking piece 40.

[0035] As a further optimization of the above technical solution, the inner sides of the two locking plates 40 are respectively provided with limiting posts 81 to restrict the locking plates 40 from rotating towards each other. The limiting posts 81 pass through the mounting holes 52 on the gasket 50 and are fixed on the mounting plate 60. The limiting posts 81 cooperate with the pins 80 to rotate and position the gasket 50.

[0036] Application of this utility model: The locking rod or the second square tube 10 of this utility model is fixed to the sliding or fixed part of the telescopic sofa or telescopic bed, and the mounting plate 60 or the first square tube 70 of this utility model is fixed to the fixed or sliding part of the telescopic sofa or telescopic bed, so that the fixed part and the sliding part of the telescopic sofa or telescopic bed are locked when they are in the retracted state. When the sliding part of the telescopic sofa or telescopic bed is pushed out by the power, the locking tongue 22 overcomes the elastic force of the elastic body 30 and pushes the two locking plates 40 to the sides to unlock, and continues to move to the unfolded state; or the fixed part and the sliding part of the telescopic sofa or telescopic bed are locked when they are in the unfolded state. When the sliding part of the telescopic sofa or telescopic bed is pushed out by the power, the locking tongue 22 overcomes the elastic force of the elastic body 30 and pushes the two locking plates 40 to the sides to unlock, and continues to move to the retracted reset state.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that simple substitutions or modifications can still be made to the technical solutions or technical features described in the foregoing embodiments, and these simple substitutions or modifications do not cause the essence of the corresponding technical solutions to deviate from the spirit and substance of the technical solutions of the embodiments of this utility model, and are still within the protection scope of this utility model.

Claims

1. A self-locking mechanism, comprising a mounting plate, characterized in that: Two hinge shafts symmetrically arranged on the mounting plate are respectively hinged to locking plates with locking hooks. The locking hooks of the two locking plates are arranged opposite each other and located at the head of the locking plates. The head of the two locking plates is respectively provided with a hook or a post for attaching an elastic body. The hook or post is provided with an elastic body that causes the two locking plates to rotate and move closer to each other. A lock head is provided. The lock head includes a lock rod and locking tongues that are symmetrically arranged on both sides of the head of the lock rod and protrude outwards, which can be attached to the locking hooks of the two locking plates.

2. The self-locking mechanism according to claim 1, characterized in that: The elastic body is a tension spring, and the two ends of the tension spring are respectively attached to the hook or the column.

3. The self-locking mechanism according to claim 1, characterized in that: The part where the lock hook engages with the lock tongue is a trapezoidal groove.

4. A self-locking mechanism according to claim 3, characterized in that: The latch is a trapezoidal body that matches the trapezoidal groove, and the latches on both sides form a trapezoidal body with a smooth transition to the lock head.

5. A self-locking mechanism according to claim 4, characterized in that: The corners of the trapezoidal body and / or trapezoidal groove are smoothly rounded.

6. A self-locking mechanism according to claim 1, characterized in that: The mounting plate is a right-angle plate formed by connecting one side of a horizontal plate and a vertical plate. The locking piece is hinged to the horizontal plate of the right-angle plate, and the vertical plate has two or more mounting holes spaced apart along the length of the vertical plate.

7. A self-locking mechanism according to claim 1, characterized in that: A first square tube or a first square rod is provided, and the mounting plate is fixed on the first square tube or the first square rod.

8. A self-locking mechanism according to claim 1, characterized in that: A second square tube or a second square rod is provided, and the locking rod is fixed to the second square tube or the second square rod.

9. A self-locking mechanism according to any one of claims 1-8, characterized in that: A gasket is provided between the mounting plate and the locking piece, and the pin passes through the hinge hole on the locking piece and the mounting hole on the gasket to fix it on the mounting plate.

10. A self-locking mechanism according to claim 9, characterized in that: The inner sides of the two locking plates are respectively provided with limiting posts to restrict the locking plates from rotating towards each other.

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