A buffer three-section rail

Abstract

The utility model discloses a kind of buffer three-section rails, including outer rail, middle rail, inner rail and buffer device, middle rail is located on outer rail, inner rail is located on middle rail, buffer device includes fixed block, sliding block, spring and damper, fixed block is fixed on outer rail, sliding block is matched with fixed block, sliding block is equipped with rotary piece, rotary piece is penetrated sliding block and is matched with outer rail, spring is two, one end of damper is fixed on fixed block, the other end is connected with sliding block, damper is located between two springs, first mounting hole is equipped on outer rail, the bottom of fixed block is equipped with clamping block, clamping block is matched with first mounting hole. By being equipped with spring in the both sides of damper, the stress of two sides spring is consistent, it is beneficial to improve the service life of spring, to ensure the service life of entire buffer device;Meanwhile, by being equipped with first mounting hole on outer rail, clamping block is equipped on fixed block, therefore, fixed block can be quickly fixed on outer rail, and it is quick and convenient to assemble.

Description

Technical Field

[0001] This utility model belongs to the field of guide rails, and in particular relates to a buffer three-section rail. Background Technology

[0002] In existing drawer slides, the operator applies force to the drawer, causing the slide to extend or retract, thus opening and closing the drawer. Many existing slides are equipped with dampers, using springs and dampers for cushioning. However, some dampers have a spring on one side and a damper on the other, such as the slide damper disclosed in application number 201721564869.4. With prolonged use, the spring on one side of this type of damper is prone to deformation, resulting in inconsistent cushioning force on both sides and affecting the lifespan of the damper. Utility Model Content

[0003] The purpose of this invention is to provide a buffer three-section rail that can solve at least one of the above problems.

[0004] According to one aspect of this utility model, a buffer three-section rail is provided, including an outer rail, a middle rail, an inner rail, and a buffer device. The middle rail is disposed on the outer rail, and the inner rail is disposed on the middle rail. The buffer device includes a fixed block, a slider, a spring, and a damper. The fixed block is fixed on the outer rail, and the slider cooperates with the fixed block. The middle rail abuts against the front end of the slider. The slider is provided with a rotating plate, which passes through the slider and cooperates with the outer rail. There are two springs. One end of the damper is fixed on the fixed block, and the other end is connected to the slider. The damper is located between the two springs. One end of the spring is disposed on the fixed block, and the other end is connected to the slider. The outer rail is provided with a first mounting hole, and the bottom of the fixed block is provided with a locking block, which cooperates with the first mounting hole.

[0005] The beneficial effects of this utility model are: by providing springs on both sides of the damper, the force on the springs on both sides can be kept consistent, which helps to improve the service life of the springs and thus ensure the service life of the entire buffer device; at the same time, by providing a first mounting hole on the outer rail and a locking block on the fixing block, the fixing block can be quickly fixed on the outer rail, making assembly quick and convenient.

[0006] In some embodiments, a second mounting hole is provided on the outer rail, and a limiting piece is provided in the second mounting hole. A card is provided at the bottom of the fixing block, and the card is inserted between the limiting piece and the second mounting hole. Thus, through the cooperation of the card and the limiting piece, the fixing block can be limited to prevent it from moving on the outer rail.

[0007] In some embodiments, the front end of the inner rail is provided with a toothed hook, and the fixed block is provided with a sliding groove. One end of the rotating plate engages with the sliding groove, and the other end passes through the slider and engages with the toothed hook. Thus, the engagement of the toothed hook and the rotating plate facilitates the function of the inner rail and the buffer device.

[0008] In some embodiments, the front end of the outer rail is provided with a U-shaped groove, the toothed hook is sleeved in the U-shaped groove, and limiting steps are provided on both sides of the toothed hook. The bottom end of the U-shaped groove is in contact with the limiting steps. Thus, by providing limiting steps, the limiting installation of the toothed hook can be facilitated.

[0009] In some embodiments, the top of the slider is provided with two limiting strips, which are located on both sides of the toothed hook and correspond to the two side walls of the inner rail, respectively. Therefore, by providing limiting strips, the accurate engagement between the toothed hook and the rotating plate can be facilitated.

[0010] In some embodiments, the top edges of both sides of the fixing block include a first plane and a second plane, with the first plane being higher than the second plane and the second plane smoothly transitioning to the first plane. The first plane is higher than the top edge of the rotating blade. Thus, by having the first plane higher than the top edge of the rotating blade, the rotating blade can be protected, preventing the drawer from colliding with it.

[0011] In some embodiments, the bottom of the fixing block is provided with a first mounting groove and a second mounting groove, with the spring disposed in the first mounting groove and the damper disposed in the second mounting groove. Thus, the mounting grooves facilitate the installation of the spring and the damper.

[0012] In some embodiments, one end of the first mounting slot is provided with a retaining groove, and one end of the spring is engaged in the retaining groove. Thus, the retaining groove facilitates the fixing of one end of the spring. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a buffer three-section rail according to the present invention;

[0014] Figure 2 This is a structural schematic diagram of a buffer three-section rail from the bottom view of this utility model;

[0015] Figure 3 This is a cross-sectional structural diagram of a buffer three-section rail according to the present invention;

[0016] Figure 4 This is a schematic diagram of the structure of a buffer device in a three-section buffer rail according to this utility model;

[0017] Figure 5 This is a structural schematic diagram of the buffer device in a three-section buffer rail according to the present invention, viewed from the bottom. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] Reference Figures 1-5 A buffer three-section rail includes an outer rail 1, a middle rail 2, an inner rail 3, and a buffer device 4. The middle rail 2 is mounted on the outer rail 1, and the inner rail 3 is mounted on the middle rail 2. The buffer device 4 includes a fixing block 41, a slider 42, a spring 43, and a damper 44. The fixing block 41 is fixed on the outer rail 1, the slider 42 cooperates with the fixing block 41, the middle rail 2 abuts against the front end of the slider 42, the slider 42 is provided with a rotating plate 45, the rotating plate 45 passes through the slider 42 and cooperates with the outer rail 1, there are two springs, one end of the damper 44 is fixed on the fixing block 41, and the other end is connected to the slider 42. The damper 44 is located between the two springs 43, one end of the spring 43 is mounted on the fixing block 41, and the other end is connected to the slider 42. The outer rail 1 is provided with a first mounting hole 11, and the bottom of the fixing block 41 is provided with a locking block 411, which cooperates with the first mounting hole 11.

[0020] In use, the outer rail 1 of this utility model is fixed to the cabinet body with screws, and the inner rail 3 is fixed to the drawer with screws. Pulling the drawer out moves the inner rail 3 relative to the outer rail 1. When the drawer needs to be opened, external force acts on the drawer, pulling it outwards, which in turn moves the inner rail 3 outwards. The inner rail 3 then pulls the slider 42, causing the spring 43 to be stretched. When the drawer needs to be closed, pushing it inwards causes the inner rail 3 to act on the slider 42, moving it relative to the fixed block 41. During this movement, the slider 42 moves slowly under the action of the damper 44, thus providing a buffering effect. By using two springs 43, the springs on both sides of the damper 44 are evenly stressed during stretching, avoiding excessive stress on one side and extending the lifespan of the springs.

[0021] The locking block 411 and the fixing block 41 are integrally injection molded structures. When the fixing block 41 is installed, the locking block 411 is directly inserted into the first mounting hole 11, and the front end of the fixing block 41 abuts against the outer end face of the outer rail 1, so as to realize the quick installation of the fixing block 41 on the outer rail 1.

[0022] A second mounting hole 12 is provided on the outer rail 1. A limiting piece 121 is formed inside the second mounting hole 12 and faces one side of the fixing block 41. A card 412 is provided at the bottom of the fixing block 41. The card 412 is inserted between the limiting piece 121 and the second mounting hole 12. When the fixing block 41 is installed on the outer rail 1, the card 412 is inserted between the limiting piece 121 and the bottom end face of the outer rail 1 to limit the fixing block 41.

[0023] The inner rail 3 has a toothed hook 5 at its front end, and the fixing block 41 has a sliding groove 413. One end of the rotating plate 45 engages with the sliding groove 413, and the other end passes through the slider 42 and engages with the toothed hook 5. The sliding groove 413 functions the same as in existing technologies and will not be described further here. The rotating plate 45 can move along the sliding groove 413, which limits and guides the position of the rotating plate 45.

[0024] Specifically, when the drawer needs to be opened, the inner rail 3 acts on the rotating plate 45 via the toothed hook 5, causing the rotating plate 45 to move along the slide groove 413, thereby moving the slider 42. At this time, the spring 43 and the damper 44 are stretched. As the drawer gradually opens outward, the toothed hook 5 separates from the rotating plate 45. When the drawer needs to be closed, the inner rail 3 moves inward. When the toothed hook 5 acts on the rotating plate 45, it pushes the rotating plate 45 to move along the slide groove 413. Under the action of the damper 44, the slider moves slowly, providing a certain buffering effect, so that the drawer closes slowly and avoids excessive impact force.

[0025] The outer rail 1 has a U-shaped groove 13 at its front end, and the toothed hook 5 is fitted inside the U-shaped groove 13. Limiting steps 51 are formed on both sides of the toothed hook 5, and the bottom end of the U-shaped groove 13 fits against the limiting steps 51. Thus, the limiting steps 51 can prevent the toothed hook 5 from being installed too high in the U-shaped groove 13, and prevent the top of the toothed hook 5 from being higher than the top of the inner rail 3.

[0026] The top of the slider 42 is formed with limiting strips 421. There are two limiting strips 421, which are located on both sides of the toothed hook 5 and correspond to the two side walls of the inner rail 3 respectively. By providing two limiting strips 421, the toothed hook 5 can be better guided when it is engaged with the rotating plate 45, so that the toothed hook 5 and the rotating plate 45 can be accurately aligned.

[0027] The tops of both sides of the fixing block 41 include a first plane 414 and a second plane 415. The first plane 414 is higher than the second plane 415, and the second plane 415 smoothly transitions to the first plane 414. The first plane 414 is higher than the top of the rotating piece 45. Since the inner rail 3 is locked and fixed to the drawer, the inner rail 3 is in close contact with the corresponding side of the drawer. Because the first plane 414 is higher than the top of the rotating piece 45, when the drawer is closed, when the drawer moves to the fixing block 41, the corresponding side of the drawer contacts the first plane 414, so that the corresponding side of the drawer will not touch the rotating piece 45, thereby preventing the drawer from pushing the rotating piece 45. At the same time, it prevents the rotating piece 45 from scratching the drawer, thus protecting the rotating piece 45.

[0028] The bottom of the fixing block 41 is provided with a first mounting groove 416 and a second mounting groove 417. The spring 43 is located in the first mounting groove 416 and the damper 44 is located in the second mounting groove 417.

[0029] One end of the first mounting groove 416 is provided with a retaining groove 418, and one end of the spring 43 is secured in the retaining groove 418. By providing the retaining groove 418, it is convenient to fix one end of the spring 43; similarly, the same retaining groove can be provided on the slider to facilitate fixing the other end of the spring 43 to the slider, thereby realizing the installation and fixation of the spring 43.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A buffer three-section rail, characterized in that, The system includes an outer rail (1), a middle rail (2), an inner rail (3), and a buffer device (4). The middle rail (2) is mounted on the outer rail (1), and the inner rail (3) is mounted on the middle rail (2). The buffer device (4) includes a fixed block (41), a slider (42), a spring (43), and a damper (44). The fixed block (41) is fixed on the outer rail (1), and the slider (42) cooperates with the fixed block (41). The middle rail (2) abuts against the front end of the slider (42). The slider (42) is provided with a rotating plate (45). After passing through the slider (42), it cooperates with the outer rail (1). There are two springs. One end of the damper (44) is fixed on the fixed block (41), and the other end is connected to the slider (42). The damper (44) is located between the two springs (43). One end of the spring (43) is set on the fixed block (41), and the other end is connected to the slider (42). The outer rail (1) is provided with a first mounting hole (11). The bottom of the fixed block (41) is provided with a locking block (411). The locking block (411) cooperates with the first mounting hole (11).

2. The buffer three-section rail according to claim 1, characterized in that, The outer rail (1) is provided with a second mounting hole (12), and a limiting piece (121) is provided in the second mounting hole (12). The bottom of the fixing block (41) is provided with a card (412), and the card (412) is inserted between the limiting piece (121) and the second mounting hole (12).

3. A buffer three-section rail according to claim 2, characterized in that, The inner rail (3) has a toothed hook (5) at its front end, and the fixed block (41) has a sliding groove (413). One end of the rotating plate (45) is engaged with the sliding groove (413), and the other end passes through the slider (42) and engages with the toothed hook (5).

4. A buffer three-section rail according to claim 3, characterized in that, The front end of the outer rail (1) is provided with a U-shaped groove (13), the toothed hook (5) is sleeved in the U-shaped groove (13), the two sides of the toothed hook (5) are provided with limiting steps (51), and the bottom end of the U-shaped groove (13) is in contact with the limiting steps (51).

5. A buffer three-section rail according to claim 4, characterized in that, The top of the slider (42) is provided with a limiting strip (421). There are two limiting strips (421). The two limiting strips (421) are located on both sides of the toothed hook (5) and correspond to the two side walls of the inner rail (3) respectively.

6. A buffer three-section rail according to any one of claims 3 to 5, characterized in that, The top of both sides of the fixing block (41) includes a first plane (414) and a second plane (415), the first plane (414) is higher than the second plane (415), the second plane (415) smoothly transitions to the first plane (414), and the first plane (414) is higher than the top of the rotating plate (45).

7. A buffer three-section rail according to any one of claims 1 to 5, characterized in that, The bottom of the fixing block (41) is provided with a first mounting groove (416) and a second mounting groove (417), the spring (43) is located in the first mounting groove (416), and the damper (44) is located in the second mounting groove (417).

8. A buffer three-section rail according to claim 7, characterized in that, One end of the first mounting groove (416) is provided with a slot (418), and one end of the spring (43) is engaged in the slot (418).

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