Locking device and sliding rail assembly

Abstract

The utility model relates to a locking device and a sliding rail assembly, the locking device is used for the sliding rail assembly, and the sliding rail assembly comprises a first rail and a second rail capable of sliding relative to the first rail; the locking device comprises a lock hole formed in the front end of the second rail; the push block is arranged at the front end of the outer side of the first rail and can slide relative to the first rail in the moving direction of the first rail; the locking block penetrates through the pushing block, the rear end of the locking block is rotationally connected to the outer side of the first rail, and the locking block comprises a sliding groove formed in the inner side of the locking block and perpendicular to the moving direction of the first rail, and the rear end of the sliding groove is gradually away from the first rail with the front end of the sliding groove as a starting point; the second shaft body is arranged on the outer side of the push block and is perpendicular to the moving direction of the first rail. The second shaft body is clamped into the front end of the sliding groove, the locking block is clamped into the locking hole, and the second rail and the first rail can be automatically locked. The locking block is pushed towards the rear end, the second shaft body slides from the front end of the sliding groove to the rear end, the locking block rotates and is separated from the locking hole, the second rail and the first rail can be unlocked, the structure is simple, and use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to slide rail technical field especially relates to locking device and slide rail assembly. BACKGROUND

[0002] The slide rail is usually installed on the drawer structure of furniture or electrical appliances. The drawer structure includes a cabinet body and a drawer box that is pulled out or pushed into the cabinet body relative to the cabinet body. The outer rail of the slide rail is fixed to the two inner walls of the cabinet body, and the inner rail is fixed to the two sides of the drawer box. When the drawer box is pulled out, the inner rail drives the middle rail, and the middle rail drives the outer rail, so that the entire slide rail is pulled out. When the drawer box is pushed in, the inner rail is pushed in and then drives the middle rail to be pushed in until the slide rail is completely closed.

[0003] Because the inner rail is not subjected to a force in the pulling-out direction or is subjected to a small force, the inner rail may still bounce outwards after being pushed in, which causes the drawer box to be unable to be completely closed and hidden dangers to occur.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0005] In view of the deficiencies of the prior art, the embodiments of the utility model disclose a locking device and a slide rail assembly to solve the problem that the slide rail may still bounce out after being pushed in, which causes the drawer box to be unable to be completely closed.

[0006] The technical solutions adopted by the utility model are as follows:

[0007] The locking device is used for a slide rail assembly, and the slide rail assembly includes a first rail and a second rail that can slide relative to the first rail. The locking device includes a lock hole that is formed in the front end of the second rail, a push block that is arranged on the outer side of the front end of the first rail and can slide relative to the first rail in the moving direction of the first rail, and a lock block that is arranged through the push block and is rotationally connected to the outer side of the first rail at the rear end. The lock block includes a sliding groove that is formed in the inner side of the lock block and is perpendicular to the moving direction of the first rail. The sliding groove has a front end and a rear end, and the rear end gradually moves away from the first rail. A second shaft body is arranged on the outer side of the push block and is perpendicular to the moving direction of the first rail. The second shaft body is clamped into the front end of the sliding groove, and the lock block is clamped into the lock hole. When the lock block is pushed towards the rear end, the second shaft body slides from the front end to the rear end of the sliding groove, the lock block rotates and is separated from the lock hole.

[0008] Further, the outer side of the first rail extends two first extension parts, the lock block is a half frame body with an opening on the inner side, and the lock block is arranged on the outer side or the inner side of the two first extension parts. The locking device includes:

[0009] A first shaft body is perpendicular to the first rail moving direction and passes through the lock block and the two first extension parts.

[0010] Further, the push block extends outwards with two second extension parts, and the second shaft body passes through the two second extension parts.

[0011] Further, a through hole is formed on the push block, the first extension part passes through the through hole, and the second extension part is positioned corresponding to the through hole.

[0012] Further, an elastic member is connected between the rear end of the push block and the first rail.

[0013] Further, four waist-shaped holes are symmetrically formed on the push block along the axis, and rivets pass through the waist-shaped holes and are riveted with the first rail.

[0014] Further, a push plate is arranged at the front end of the push block and extends towards the outside.

[0015] The utility model discloses a slide rail assembly provided with the locking device, and the slide rail assembly comprises a first rail, a second rail capable of sliding relative to the first rail and a third rail capable of sliding relative to the second rail.

[0016] The utility model has the following advantages:

[0017] (1) The locking device and the slide rail assembly can automatically lock the second rail and the first rail when the slide rail is completely pushed in, and the locking device is simple in structure and convenient to use, and can ensure that the slide rail is completely pushed in.

[0018] (2) Further, the locking device is installed on the slide rail assembly, so that the slide rail can be stably locked even when it is completely pushed in, and the stability of the slide rail is further improved, and the locking device is especially suitable for multi-section slide rails. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the axonometric drawing of the utility model slide rail assembly.

[0020] Figure 2 It is the explosion view of the utility model locking device.

[0021] Figure 3 is a top view structural schematic diagram of the locking device in the locking state in the utility model.

[0022] Figure 4 is a top view structural schematic diagram of the locking device in the unlocking state in the utility model.

[0023] In the drawing:

[0024] 1, first rail; 11, first extension; 12, first shaft body; 13, first clamping spring; 2, second rail; 21, lock hole; 3, third rail; 4, push block; 41, second extension; 42, second shaft body; 43, second clamping spring; 44, through hole; 45, waist-shaped hole; 46, push plate; 5, lock block; 51, sliding groove; 6, rivet; 7, elastic member; 8, middle rail retainer; 9, outer rail retainer. DETAILED DESCRIPTION

[0025] The specific embodiments of the utility model will be described below in conjunction with the drawings.

[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the device proposed by the utility model is further described in detail below in conjunction with the drawings and specific embodiments. According to the following description, the advantages and features of the utility model will be more clear. It should be noted that the drawings are very simplified and all use non-precise proportions, only to facilitate and clearly assist the purpose of explaining the embodiments of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the drawings. It is known that the structure, proportion, size and the like shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, so that people skilled in the art can understand and read, and are not used to limit the limiting conditions of the implementation of the utility model, so they do not have the technical essence, any modification of structure, change of proportion relationship or adjustment of size, as long as it does not affect the effect and purpose that can be achieved by the utility model, it should still fall within the scope of the technical content disclosed by the utility model.

[0027] First embodiment:

[0028] The present embodiment discloses a locking device.

[0029] The locking device is used for a slide rail assembly, and the slide rail assembly comprises a first rail 1 and a second rail 2 which can slide relative to the first rail 1. The slide rail assembly can have two or more than two tracks. In the present embodiment, the first rail 1 is an inner rail, and the second rail 2 is an outer rail.

[0030] In Figure 1In the embodiments shown in the other accompanying drawings, the direction pointed to by arrow X is the front end of the slide rail assembly, i.e., the opening direction, and the opposite direction pointed to by arrow X is the rear end of the slide rail assembly, i.e., the closing direction. The direction pointed to by arrow Y is the inner side of the slide rail assembly, and the opposite direction pointed to by arrow Y is the outer side of the slide rail assembly. The direction pointed to by arrow Z is the upper end of the slide rail assembly, and the opposite direction pointed to by arrow Z is the lower end of the slide rail assembly.

[0031] The locking device includes a lock hole 21, a push block 4, a lock block 5, and a second shaft 42.

[0032] Figure 1 This is an isometric view of the slide rail assembly of this utility model. Figure 1 As shown, the keyhole 21 is located at the front end of the second rail 2.

[0033] Figure 2 This is an exploded view of the locking device of this utility model. Figure 2 As shown, the push block 4 is disposed at the outer front end of the first rail 1 and can slide relative to the first rail 1 in the moving direction of the first rail 1. For example, four oblong holes 45 are symmetrically opened on the push block 4 along the axis. The oblong holes 45 are disposed along the moving direction of the first rail 1. The rivet 6 passes through the oblong holes 45 and is riveted to the first rail 1. When the push block 4 is pushed, the oblong holes 45 and the rivet 6 slide relative to each other.

[0034] like Figure 1 As shown, the locking block 5 passes through the push block 4 and is rotatably connected to the outside of the first rail 1. The locking block 5 includes a groove 51, which is perpendicular to the moving direction of the first rail 1 and is located inside the locking block 5. Starting from the front end of the groove 51, the rear end of the groove 51 gradually moves away from the first rail 1. For example, two parallel first extensions 11 extend from the outside of the first rail 1. The locking block 5 is a semi-frame with an opening on the inside. The locking block 5 is fitted onto the outside or inside of the two first extensions 11, saving material costs. The locking device includes a first shaft 12, which is perpendicular to the moving direction of the first rail 1 and passes through the locking block 5 and the two first extensions 11, allowing the locking block 5 to rotate around the first shaft 12 in the horizontal plane. Specifically, the first shaft 12 is a pin, and a first retaining spring 13 is also engaged at the outer end of the first shaft 12 away from the pin head to restrict the axial movement between the locking block 5 and the first extensions 11, while preventing the first shaft 12 from disengaging from the locking block 5 and the first extensions 11.

[0035] like Figure 1 As shown, the second shaft 42 is disposed on the outside of the push block 4, perpendicular to the moving direction of the first rail 1. For example, two second extensions 41 extend from the outside of the push block 4, and the second shaft 42 passes through the two second extensions 41. Specifically, the second shaft 42 is a pin, and a second retaining spring 43 is also provided at the end of the second shaft 42 away from the pin head to prevent the second shaft 42 from disengaging from the second extensions 41.

[0036] Figure 3 This is a top view of the locking device in the locked state of this utility model. Wherein, as... Figure 3 As shown, when the first rail 1 is fully pushed into the second rail 2, the second shaft 42 is engaged with the front end of the slide groove 51. Since the front end of the slide groove 51 is close to the inner rail, the locking block 5 is pushed by the second shaft 42 to rotate toward the second rail 2. The locking block 5 is engaged in the lock hole 21, and the locking device locks. Figure 4 This is a top view of the locking device in the unlocked state of this utility model. Figure 4 As shown, when the locking block 5 is pushed toward the rear end, the second shaft 42 slides from the front end of the slide groove 51 to the rear end. Since the rear end of the slide groove 51 is far from the inner rail, the locking block 5 is pulled by the second shaft 42 to rotate toward the first rail 1 until the locking block 5 disengages from the lock hole 21 and the locking device is unlocked.

[0037] Preferably, a through hole 44 is provided on the push block 4, the first extension 11 passes through the through hole 44, and the position of the second extension 41 corresponds to the through hole 44, thereby saving space between the first rail 1 and the second rail 2 and reducing the volume of the slide rail assembly.

[0038] like Figure 2 As shown, furthermore, an elastic element 7 is connected between the rear end of the push block 4 and the first rail 1. After the push block 4 is released, the elastic element 7 can push the push block 4 to reset. For example, the elastic element 7 can be a compression spring, tension spring, leaf spring, torsion spring, or other elastic structure, as long as it can provide the force to push the push block 4 to reset. This utility model does not impose further limitations on this.

[0039] like Figure 2 As shown, further, a push plate 46 is provided at the front end of the push block 4, and the push plate 46 extends outward.

[0040] In this embodiment, by installing a locking device on the slide rail, when the slide rail is fully pushed in, the second shaft 42 engages with the front end of the slide groove 51, and the locking block 5 engages with the locking hole 21, automatically locking the second rail 2 and the first rail 1. When it is necessary to pull out the slide rail, pressing the push block 4 pushes the second shaft 42, causing the second shaft 42 to slide from the front end of the slide groove 51 to the rear end, pulling the locking block 5 towards the first rail 1 until the locking block 5 disengages from the locking hole 21, thus unlocking the second rail 2 and the first rail 1. The locking device has a simple structure, is easy to use, and ensures that the slide rail is fully pushed in.

[0041] Second embodiment:

[0042] This embodiment discloses a slide rail assembly.

[0043] The slide rail assembly is provided with the locking device of the first embodiment, and the slide rail assembly comprises a first rail 1, a third rail 3 which is slidable relative to the first rail 1, and a second rail 2 which is slidable relative to the third rail 3. For example, the first rail 1 is an inner rail, the second rail 2 is an outer rail, and the third rail 3 is a middle rail. The inner rail is mounted on the middle rail through a middle rail holder 8, and the middle rail is mounted on the outer rail through an outer rail holder 9.

[0044] In the embodiment, the locking device is mounted on the slide rail assembly, so that the slide rail can ensure stable locking between the rails even when being fully pushed in, and the stability of the slide rail is further improved. The locking device is especially suitable for multi-section slide rails.

[0045] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present application.

[0046] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that, for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. Locking device, characterized in that A locking device for a slide rail assembly, the slide rail assembly comprising a first rail and a second rail slidable relative to the first rail, the locking device comprising: a locking hole formed in a front end of the second rail; a push block disposed on an outer side of a front end of the first rail and slidable relative to the first rail in a moving direction of the first rail; a lock block disposed through the push block and rotatably connected to an outer side of the first rail at a rear end thereof, the lock block comprising a sliding groove formed in an inner side of the lock block perpendicular to the moving direction of the first rail, the sliding groove having a front end and a rear end, the rear end gradually moving away from the first rail starting from the front end of the sliding groove; a second shaft disposed on an outer side of the push block perpendicular to the moving direction of the first rail; wherein the second shaft is engaged into the front end of the sliding groove and the lock block is engaged into the locking hole, the lock block is pushed towards the rear end, the second shaft slides from the front end to the rear end of the sliding groove, and the lock block rotates and disengages from the locking hole.

2. The locking device of claim 1, wherein: The first rail extends two first extension portions on an outer side thereof, the lock block is a half frame body having an opening on an inner side thereof, and the lock block is sleeved on an outer side or an inner side of the two first extension portions. The locking device comprises a first shaft perpendicular to the moving direction of the first rail and disposed through the lock block and the two first extension portions.

3. The locking device of claim 2, wherein: The push block extends two second extension portions on an outer side thereof, and the second shaft is disposed through the two second extension portions.

4. The locking device of claim 3, wherein: A through hole is formed in the push block, the first extension portions are disposed through the through hole, and the second extension portions are positioned corresponding to the through hole.

5. The locking device of claim 1, wherein: An elastic member is connected between the push block and the first rail at a rear end thereof.

6. The locking device of claim 1, wherein: Four waist-shaped holes are symmetrically formed in the push block along an axis, and rivets are riveted through the waist-shaped holes and the first rail.

7. The locking device of claim 1, wherein: A push plate is disposed on a front end of the push block and extends towards an outer side.

8. A slide rail assembly installed with the locking device according to any one of claims 1 to 7, characterized in that, The slide rail assembly comprises a first rail, a second rail slidable relative to the first rail, and a third rail slidable relative to the second rail.

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