A return buffer device for a guide rail and a drawer guide rail having the same

Abstract

The application discloses a return buffer device for a guide rail, which comprises a damper, a rotating part, an elastic part and a trigger part, the damper is arranged on a fixed rail or a sliding rail, the rotating part is arranged on the fixed rail and cooperates with the damper, one end of the elastic part is connected to the rotating part and the other end is connected to the fixed rail, and the trigger part is arranged on the sliding rail. When the sliding rail is driven to return to a certain position, the trigger part can drive the rotating part to rotate to a state of disengagement from balance, then the elastic part drives the rotating part to continuously rotate and compress the damper to realize damping buffering, and meanwhile the rotating part drives the trigger part to move to realize automatic return of the sliding rail. Thus, the rotating part is arranged between the sliding rail and the damper to realize transmission, the linear buffering stroke of the sliding rail is converted into the rotating stroke of the rotating part and then into the linear compression stroke of the damper, the compression stroke of the damper is greatly reduced, a smaller damper can meet the product requirements, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of drawer slide technology, and more particularly to a return buffer device for drawer slides and a drawer slide having the same. Background Technology

[0002] This section provides only background information related to this application to enable those skilled in the art to understand this application more thoroughly and accurately, and it is not necessarily prior art.

[0003] Currently, drawers with guide rails move very smoothly. To avoid impacts and noises when the drawer closes, most guide rails are equipped with a return buffer mechanism. In the later stage of closing, the drawer is slowly moved until it is fully closed by the combined action of a pre-stretched spring and a damper. For example, the self-closing buffer assembly for drawer guides disclosed in patent authorization number CN208798875U includes a buffer frame, a damper, a tension spring, a moving slider, and a rotating slider. The damper is mounted on the buffer frame; one end of the tension spring is fixed to the buffer frame, and the other end is connected to the moving slider; the moving slider is inserted into the buffer frame and can move in a specific direction; the damping pin end of the damper is connected to the moving slider; the rotating slider is rotatably mounted on the moving slider and inserted into the buffer frame and can move in a specific direction. Therefore, when the drawer is closed to a certain position, the drive block on the drawer guide rail drives the rotating slider to rotate in the opposite direction and disengage from the recessed position. At this time, under the tension of the tension spring, the rotating slider, the moving slider, and the drive component can move in the opposite direction on the buffer frame, and the drawer can be slowly closed by itself under the action of the damper.

[0004] However, some shortcomings of the device were found during use that need to be improved: when the drawer guide rail drives the rotating slider to disengage from the recessed position, the rotating slider and the moving slider will move synchronously and in the opposite direction with the drawer guide rail on the buffer frame. That is, the buffer movement stroke of the drawer guide rail is the same as the extension and retraction stroke of the damper's damping pin. When the required buffer movement stroke of the drawer guide rail is large, the corresponding extension and retraction stroke of the damping pin is also large, which means that a larger damper is required, thereby increasing the cost. Summary of the Invention

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a return buffer device for guide rails. The sliding rail and the damper are driven by a rotating component, which can convert the linear buffer stroke of the sliding rail into the rotational stroke of the rotating component, and then into the linear compression stroke of the damper. This greatly reduces the compression stroke of the damper, requiring only a smaller damper to meet product requirements, thereby reducing costs.

[0006] This invention is achieved using the following technical solution: a guide rail return buffer device, comprising:

[0007] A damper, which is used to be installed on a fixed rail or a sliding rail;

[0008] A rotating component, which is rotatably mounted on a fixed rail and cooperates with the damper;

[0009] An elastic element, one end of which is connected to the rotating element, and the other end of which is used to connect to the fixed rail;

[0010] A trigger element, which is used to be mounted on a sliding rail;

[0011] When the sliding rail is pulled out to a certain position, the rotating component is in a balanced or locked state under the elastic force of the elastic component, and the damper is in an uncompressed initial state.

[0012] When the sliding rail is driven back to a certain position, the trigger causes the rotating part to rotate from the balanced state to the unbalanced state, or the trigger causes the rotating part to rotate from the locked state to the balanced state and then to the unbalanced state. Subsequently, the elastic element causes the rotating part to continue rotating and compress the damper to achieve damping and buffering. At the same time, the rotating part causes the trigger to move to achieve automatic return of the sliding rail.

[0013] In one embodiment, when the rotating component is in a balanced state, the connection points of the elastic component and the fixed rail, the connection points of the elastic component and the rotating component, and the connection points of the rotating component and the fixed rail are all on the same straight line.

[0014] In one embodiment, when the rotating member is in the locked state, the rotating member abuts against the fixed rail.

[0015] In one embodiment, the damper includes a fixed portion and a telescopic portion that moves relative to the fixed portion to form a damping buffer, the rotating member being connected to the telescopic portion.

[0016] In one embodiment, the rotating component has a first slot that cooperates with the trigger. When the sliding rail is driven back to its original position until the trigger engages with the first slot, the sliding rail is driven back to its original position, and the rotating component is driven to rotate to a state of disequilibrium through the engagement of the trigger with the first slot. After the elastic element drives the rotating component to continue rotating.

[0017] When the sliding rail is pulled out, the sliding rail engages with the first slot through the trigger to drive the rotating component to overcome the elastic force of the elastic component and reset its rotation. At the same time, the rotating component drives the damper to reset until the trigger disengages from the first slot. Under the elastic force of the elastic component, the rotating component is in a balanced or locked state, and at this time the damper resets to its initial state.

[0018] In one embodiment, the rotating component is further provided with a second slot that engages with the trigger. When the trigger is engaged in the second slot and pulled out of the sliding rail until the trigger is disengaged from the second slot, the rotating component is in a balanced or locked state under the elastic force of the elastic component. At this time, the damper is reset to its initial state.

[0019] In one embodiment, the rotating component is further provided with a guide wedge for guiding the trigger component into the second slot.

[0020] In one embodiment, a mounting bracket for mounting on a fixed rail is also included, and the damper is mounted on the mounting bracket.

[0021] In one embodiment, a shielding cover disposed on the mounting bracket is further included, the shielding cover at least partially shielding the elastic element.

[0022] In addition, the present invention also provides a drawer guide rail, including a fixed rail, a sliding rail, and a return buffer device disposed between the fixed rail and the sliding rail.

[0023] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a rotating component to transmit power between the sliding rail and the damper. When the sliding rail is driven back to its original position, the rotating component will continue to rotate under the elastic force of the elastic component and synchronously compress the damper and drive the sliding rail back to its original position. In this way, the linear buffer stroke of the sliding rail can be converted into the rotation stroke of the rotating component and then into the linear compression stroke of the damper, thereby greatly reducing the compression stroke of the damper. Only a smaller damper is needed to meet the product requirements, thereby reducing the cost. Attached Figure Description

[0024] Figure 1 This is an exploded view of the drawer guide rail of the present invention;

[0025] Figure 2 for Figure 1 A structural diagram from another perspective;

[0026] Figure 3 This is a schematic diagram of the drawer guide rail of the present invention when the sliding rail is in the pulled-out state;

[0027] Figure 4 for Figure 3 A structural diagram with the mounting bracket and cover removed;

[0028] Figure 5 This is a schematic diagram of the structure in the drawer guide rail of the present invention, showing the initial contact between the sliding rail and the rotating component.

[0029] Figure 6 This is a schematic diagram of the structure of the drawer guide rail of the present invention when the sliding rail is in a damped buffer state;

[0030] Figure 7 This is a schematic diagram of the structure of the drawer guide rail after the damping buffer is completed;

[0031] Figure 8 This is a schematic diagram of the structure of the drawer guide rail of the present invention, in which the rotating component is in an abnormal position when the sliding rail is in the pulled-out state;

[0032] Figure 9 This is an exploded view of a drawer guide rail according to another embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of the drawer guide rail according to another embodiment of the present invention.

[0034] The labels in the diagram represent the following meanings: 1. Damper; 11. Fixed part; 12. Telescopic part; 2. Rotating part; 21. First slot; 22. First mounting hole; 23. First protrusion; 24. Second slot; 25. Reinforcing groove; 26. Guide block; 3. Rivet; 4. Elastic part; 5. Trigger; 6. Mounting bracket; 61. Mounting groove; 62. First slider; 63. Second slider; 64. Buckle; 7. Cover; 8. Fixed rail; 81. Second mounting hole; 82. Second protrusion; 83. First slide groove; 84. Second slide groove; 85. Locking hole; 9. Sliding rail. Detailed Implementation

[0035] To further illustrate the technical means and effects adopted by this application to achieve the intended purpose, the following detailed description of the specific implementation methods, structures, features and effects of this application, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0036] In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0037] It should also be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0039] Example 1

[0040] See Figure 1-8 This invention discloses a drawer slide. In this embodiment, the drawer slide is a concealed slide and includes a fixed rail 8, a sliding rail 9 that slides linearly relative to the fixed rail 8, and a return buffer device disposed between the fixed rail 8 and the sliding rail 9. By providing the return buffer device, the drawer can be moved slowly until it is fully closed in the later stage of closing, thereby avoiding impact and noise when the drawer is closed, and thus extending the service life of the drawer.

[0041] Specifically, the return buffer device includes a damper 1, a rotating member 2, an elastic member 4, and a trigger member 5. The damper 1 is mounted on a fixed rail 8 and includes a fixed part 11 and a telescopic part 12 that moves relative to the fixed part 11 to form a damping buffer. The rotating member 2 is rotatably mounted on the fixed rail 8 and connected to the telescopic part 12 of the damper 1. One end of the elastic member 4 is connected to the rotating member 2, and the other end is connected to the fixed rail 8. The trigger member 5 is mounted on a sliding rail 9 and cooperates with the rotating member 2.

[0042] Preferably, the damper 1 is a hydraulic cylinder, and the fixed rail 8 is provided with a mounting bracket 6, which has a mounting groove 61 for mounting the hydraulic cylinder. The cylinder has a rod that abuts against the mounting groove 61 to form a fixed part 11, and a cylinder body that extends and retracts relative to the rod to form a telescopic part 12. The rotating component 2 is a rotating block that is connected to the cylinder body. The rotating block has a first mounting hole 22, and the fixed rail 8 has a second mounting hole 81 corresponding to the first mounting hole 22. Thus, the rotating block can be rotatably connected to the fixed rail 8 by using a rivet 3 that passes through the first mounting hole 22 and is fixed in the second mounting hole 81. The elastic component 4 is a tension spring. The rotating block has a first protrusion 23, and the fixed rail 8 has a second protrusion 82. One end of the tension spring is sleeved on the first protrusion 23, and the other end is sleeved on the second protrusion 82. The trigger component 5 is a locking pin that is set on the side wall of the sliding rail 9. The rotating block has a first locking groove 21 that cooperates with the locking pin.

[0043] In this embodiment, the bottom of the mounting bracket 6 is provided with a first slider 62 and a second slider 63. The fixed rail 8 is provided with a first groove 83 and a second groove 84 that respectively cooperate with the first slider 62 and the second slider 63. In addition, the mounting bracket 6 is also provided with a buckle 64, and the fixed rail 8 is provided with a corresponding locking hole 85. Thus, when the first slider 62 and the second slider 63 in the mounting bracket 6 are slid into the first groove 83 and the second groove 84 respectively until the buckle 64 engages with the locking hole 85, the mounting bracket 6 can be installed on the fixed rail 8.

[0044] In this embodiment, the rotating block is also provided with several reinforcing grooves 25, which improves the support strength of the rotating block and extends its service life.

[0045] Additionally, a shielding cover 7 is provided on the mounting bracket 6, which at least partially shields the tension spring, thereby preventing dust and impurities from adhering to the spring and affecting its elasticity. Preferably, the shielding cover 7 is integrally formed with the mounting bracket 6, thus eliminating the need to separately manufacture two parts and saving costs.

[0046] See Figure 7 When the drawer is fully closed, the trigger 5 is engaged in the first slot 21. Then, when the drawer is pulled outwards to move the sliding rail 9 relative to the fixed rail 8, the sliding rail 9, through the engagement of the trigger 5 with the first slot 21, drives the rotating component 2 to overcome the elastic force of the elastic component 4 and reset its rotation. Simultaneously, the rotating component 2 drives the cylinder of the damper 1 to reset, until the trigger 5 disengages from the first slot 21 (e.g., ...). Figure 3 As shown in the figure, at this time, the rotating part 2 abuts against the side wall of the fixed rail 8 under the elastic force of the elastic part 4 and is in a locked state, while the damper 1 is reset to the initial state.

[0047] It should be noted that the rotating component 2 has three states under the elastic force of the elastic component 4: a static state of force equilibrium, a state of rotation to the left, or a state of rotation to the right. Let point A be the connection point between the elastic component 4 and the fixed rail 8, point B be the connection point between the elastic component 4 and the rotating component 2, and point C be the connection point between the rotating component 2 and the fixed rail 8. When points A, B, and C are all on the same straight line, the rotating component 2 is in a state of force equilibrium. When point B deviates from the straight line connecting points A and C and is located on the left, the rotating component 2 rotates to the left under the elastic force of the elastic component 4. When point B deviates from the straight line connecting points A and C and is located on the right, the rotating component 2 rotates to the right under the elastic force of the elastic component 4.

[0048] See again Figure 3When the sliding rail 9 is pulled out until the trigger 5 is disengaged from the first slot 21, point B deviates from the straight line connecting points A and C and is located on the left. Therefore, the rotating part 2 rotates to the left and abuts against the side wall of the fixed rail 8 to form a locking state.

[0049] Of course, in other embodiments, the rotating component 2 can also be in a balanced state, that is, when the sliding rail 9 is pulled out until the trigger 5 is disengaged from the first slot 21, points A, B and C are all on the same straight line, and the rotating component 2 is in a static state of force balance. There are no restrictions here.

[0050] When the drawer is closed, causing the sliding rail 9 to return to its original position relative to the fixed rail 8, the trigger 5 first engages with the first slot 21 (e.g., Figure 5 As shown), the sliding rail 9 continues to return to its original position, and the trigger 5 engages with the first slot 21 to drive the rotating part 2 from the locked state to a state of force balance (i.e., points A, B, and C are all on the same straight line). After the balance state is lost, the elastic element 4 drives the rotating part 2 to continue rotating to the right and compress the cylinder of the damper 1 to achieve damping and buffering. At the same time, the rotating part 2 engages with the first slot 21 through the trigger 5 to drive the sliding rail 9 to automatically return to its original position (as shown). Figure 6 As shown), until the sliding rail 9 is fully buffered and closed (as shown). Figure 7 (As shown).

[0051] Therefore, this invention uses a rotating component 2 between the sliding rail 9 and the damper 1 for transmission. When the sliding rail 9 returns to its original position, and the rotating component 2 is no longer in equilibrium, it will continue to rotate under the elastic force of the elastic component 4, simultaneously compressing the damper 1 and driving the sliding rail 9 back to its original position. This configuration converts the linear buffer stroke of the sliding rail 9 into the rotational stroke of the rotating component 2, and then into the linear compression stroke of the damper 1, thus significantly reducing the compression stroke of the damper 1. Only a smaller damper 1 is needed to meet product requirements, thereby reducing costs. Furthermore, this invention uses a single rotating component 2 instead of the rotating and moving sliders in the prior art, reducing the number of parts and simplifying the structure, further lowering production costs.

[0052] It should be noted that in other embodiments, the damper 1 can also be mounted on the sliding rail 9, and a fixing block is provided on the fixed rail 8 for abutting and engaging with the telescopic part 12 of the damper 1. Thus, when the sliding rail 9 is driven back to its original position until the telescopic part 12 of the damper 1 abuts against the fixing block, the fixing block drives the telescopic part 12 to move relative to the fixed part 11 to achieve damping and buffering, which can also achieve the same damping and buffering effect, so there is no limitation here.

[0053] Furthermore, the rotating component 2 is also provided with a second slot 24 that engages with the trigger component 5, and a guide block 26 for guiding the trigger component 5 into the second slot 24; for details, please refer to Figure 8 When the drawer is in the extended state and the rotating part 2 is out of balance and pulled by the elastic part 4 to fully compress the damper 1, the drawer is closed again to drive the sliding rail 9 back to its original position until the trigger 5 abuts against the guide block 26 and enters the second slot 24 along the guide block 26. At this time, the drawer is pulled out again to drive the sliding rail 9 to move until the trigger 5 disengages from the second slot 24. At this time, the rotating part 2 returns to the locked state under the elastic force of the elastic part 4 (e.g., Figure 3 (As shown) or in a balanced state, when the drawer is closed again, the trigger 5 can engage with the first slot 21.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] This invention utilizes a rotating component 2 for transmission between the sliding rail 9 and the damper 1. When the sliding rail 9 returns to its original position, and the rotating component 2 de-equipped, it continues to rotate under the elastic force of the elastic component 4, simultaneously compressing the damper 1 and driving the sliding rail 9 back to its original position. This design converts the linear buffer stroke of the sliding rail 9 into the rotational stroke of the rotating component 2, which in turn converts into the linear compression stroke of the damper 1. This significantly reduces the compression stroke of the damper 1, requiring only a smaller damper 1 to meet product requirements, thus lowering costs. Furthermore, this invention uses a single rotating component 2 instead of the rotating and moving sliders in the prior art, reducing the number of components and simplifying the structure, further lowering production costs.

[0056] Example 2

[0057] See Figure 9-10 The difference between the drawer guide rail in this embodiment and that in embodiment one is that the drawer guide rail is a ball bearing rail. The ball bearing rail also includes a fixed rail 8, a sliding rail 9 that slides linearly relative to the fixed rail 8, and a return buffer device disposed between the fixed rail 8 and the sliding rail 9. The structure and working process of the return buffer device are roughly the same as those in embodiment one, so they will not be described in detail here.

[0058] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A return buffer device for a guide rail, characterized in that, include: A damper, which is used to be installed on a fixed rail or a sliding rail; A rotating component, which is rotatably mounted on a fixed rail and cooperates with the damper; An elastic element, one end of which is connected to the rotating element, and the other end of which is used to connect to the fixed rail; A trigger element, which is used to be mounted on a sliding rail; When the rotating component is in equilibrium, the connection points between the elastic component and the fixed rail, the connection points between the elastic component and the rotating component, and the connection points between the rotating component and the fixed rail are all on the same straight line; the rotating component rotates around the connection point between the rotating component and the fixed rail, and does not move in a straight line with the sliding rail. When the sliding rail is pulled out to a certain position, the rotating component is in a balanced or locked state under the elastic force of the elastic component, and the damper is in an uncompressed initial state. When the sliding rail is driven back to a certain position, the trigger causes the rotating part to rotate from the balanced state to the unbalanced state, or the trigger causes the rotating part to rotate from the locked state to the balanced state and then to the unbalanced state. Subsequently, the elastic element causes the rotating part to continue rotating and compress the damper to achieve damping and buffering. At the same time, the rotating part causes the trigger to move to achieve automatic return of the sliding rail.

2. The return buffer device according to claim 1, characterized in that, When the rotating component is in the locked state, it abuts against the fixed rail.

3. The return buffer device according to any one of claims 1-2, characterized in that, The damper includes a fixed portion and a telescopic portion that moves relative to the fixed portion to form a damping buffer, and the rotating member is connected to the telescopic portion.

4. The return buffer device according to any one of claims 1-2, characterized in that, The rotating component has a first slot that cooperates with the trigger component. When the sliding rail is driven back to its original position until the trigger component engages with the first slot, the sliding rail is driven back to its original position and the rotating component is driven to rotate to a state of disequilibrium through the engagement of the trigger component with the first slot. After the rotating component is driven to rotate to a state of disequilibrium, the elastic component drives the rotating component to continue rotating. When the sliding rail is pulled out, the sliding rail engages with the first slot through the trigger to drive the rotating component to overcome the elastic force of the elastic component and reset its rotation. At the same time, the rotating component drives the damper to reset until the trigger disengages from the first slot. Under the elastic force of the elastic component, the rotating component is in a balanced or locked state, and at this time the damper resets to its initial state.

5. The return buffer device according to claim 4, characterized in that, The rotating component is also provided with a second slot that engages with the trigger component. When the trigger component is engaged in the second slot and pulled out of the sliding rail until the trigger component is disengaged from the second slot, the rotating component is in a balanced or locked state under the elastic force of the elastic component. At this time, the damper is reset to its initial state.

6. The return buffer device according to claim 5, characterized in that, The rotating component is also provided with a guide wedge for guiding the trigger component into the second slot.

7. The return buffer device according to any one of claims 1-2, characterized in that, It also includes a mounting bracket for mounting on a fixed rail, on which the damper is mounted.

8. The return buffer device according to claim 7, characterized in that, It also includes a cover disposed on the mounting bracket, the cover at least partially shielding the elastic element.

9. A drawer slide, characterized in that, It includes a fixed rail, a sliding rail, and a return buffer device as described in any one of claims 1-8 disposed between the fixed rail and the sliding rail.

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