Three-section type sliding rail

Abstract

The utility model provides a three-section type sliding rail which comprises an outer rail, a middle rail and an inner rail, a middle rail unfolding lock is arranged at the inner side end of the middle rail, the middle of the middle rail unfolding lock is elastically and rotatably connected with the middle rail, an upper limiting plate is arranged on the upper side of one end of the middle rail unfolding lock, and a lower limiting plate is arranged on the lower side of the other end of the middle rail unfolding lock. A second limiting boss is arranged at the inner side end of the inner rail, the first limiting boss is matched with the lower limiting plate, and the second limiting boss is matched with the upper limiting plate. An inner rail unfolding lock is arranged at the inner side end of the inner rail, a baffle is arranged at the outer side end of the middle rail, one end of the inner rail unfolding lock is elastically and rotationally connected with the inner rail, a rectangular clamping groove clamped with the baffle is formed in one side of the middle of the inner rail unfolding lock, and when the baffle is clamped in the clamping groove, the middle rail and the inner rail are unfolded and locked. The inner rail is further provided with an unlocking mechanism capable of releasing the unfolding locking state. The locking device is simple in structure, and the locking and unlocking processes are simple, stable and smooth; and an unfolded locking mechanism and an unfolded unlocking mechanism are arranged, so that locking is stable, and safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of slide rails, in particular to a three-section slide rail. Background Art

[0002] The three-section slide rail has the advantages of small occupied space, strong load-bearing capacity, etc., and is therefore widely used in fields such as financial self-service equipment, servers, storage cabinets, etc. The three-section slide rail includes an outer rail, a middle rail, and an inner rail. When in use, generally the outer rail is fixed, and under the action of pulling or pushing, the middle rail and the inner rail slide out or slide back to realize the telescoping of the slide rail.

[0003] Existing three-section slide rails generally expand or retract in a sequential manner, and the sequential movement is achieved through the cooperation of a limiting member and a locking member. However, the structural design of the limiting member and the locking member is complex, the processing difficulty is large, the installation is inconvenient, and the locking and unlocking processes are complex during the movement, resulting in high failure rates and low reliability.

[0004] In addition, existing three-section slide rails generally do not have an expansion locking device. In the state where the middle rail and the inner rail are fully expanded, due to the small limiting resistance between the components, the end of the inner rail is extremely easy to close when colliding with an external force in the moving direction of the slide rail, affecting the use experience and even causing safety accidents such as pinching hands. Summary of the Utility Model

[0005] The utility model aims to provide a three-section slide rail to overcome the deficiencies existing in the prior art.

[0006] To solve the above technical problems, the technical solution of the present utility model is: a three-section slide rail, including an outer rail, a middle rail, and an inner rail connected in sequence. A stop block is provided at the inner end of the outer rail. A locking and limiting member is provided at the inner end of the middle rail. The locking and limiting member includes a middle rail unfolding lock. The middle of the middle rail unfolding lock is elastically rotatably connected to the middle rail. An upper limiting plate that is vertically bent upward and inclined is provided on the upper side of one end, and a lower limiting plate that is vertically bent downward is provided on the lower side of one end. A through hole for the lower limiting plate to pass downward is provided on the middle rail, and this through hole can also limit the rotation angle of the lower limiting plate. A limiting convex platform one protruding upward is provided in the middle of the outer rail. A limiting convex platform two protruding downward is provided at the inner end of the inner rail. The limiting convex platform one and the limiting convex platform two are both provided with inclined limiting guiding surfaces, and the inclined directions of the limiting guiding surfaces of the limiting convex platform one, the limiting convex platform two, and the upper limiting plate are the same. The cooperation between the limiting convex platform one and the lower limiting plate can lock the inner end of the middle rail in the middle of the outer rail and unlock the locking connection between the inner end of the middle rail and the inner end of the inner rail. The cooperation between the limiting convex platform two and the upper limiting plate can release the locking of the inner end of the middle rail and the middle of the outer rail and lock the inner end of the inner rail in the inner end of the middle rail. A locking mechanism is further provided at the inner end of the inner rail. The locking mechanism includes an inner rail unfolding lock. A baffle vertically bent upward is provided at the outer end of the middle rail. One end of the inner rail unfolding lock is elastically rotatably connected to the inner rail. A rectangular card slot for engaging with the baffle is provided on one side of the middle part. When the baffle is clamped in the card slot, the middle rail and the inner rail are unfolded and locked. An unlocking mechanism is further provided on the side of the inner rail facing the middle rail. The unlocking mechanism cooperates with the inner rail unfolding lock to release the unfolding lock between the middle rail and the inner rail.

[0007] Further, for the above three-section slide rail, the locking and limiting member further includes an elastic member one. The elastic member one is a torsion spring. One end of it is sleeved on a pin, and the other end is provided with two crossed torsion bars. The bending part of one torsion bar is inserted into the jack of the middle rail unfolding lock, and the bending part of the other torsion bar is inserted into the jack of the middle rail. The pin is fixed on the middle rail. And the middle of the middle rail unfolding lock is elastically rotatably connected to the middle rail through a pin shaft and the elastic member one.

[0008] Further, for the above three-section slide rail, the locking mechanism further includes an elastic member two. The elastic member two is a torsion spring. One end of the elastic member two is sleeved on a pin, and the other end is provided with two torsion bars. One torsion bar abuts against the side wall of the inner rail, and the other torsion bar abuts against the inner rail unfolding lock. A limiting plate is provided on the inner rail unfolding lock. The limiting plate and the side surface of the inner rail unfolding lock close to the inner rail form a step. The torsion bar on the elastic member abutting against the inner rail unfolding lock is arranged in the step. One end of the inner rail unfolding lock is elastically rotatably connected to the inner rail through a pin shaft and the elastic member two. A limiting groove for limiting the rotation angle of the inner rail unfolding lock is further provided in the middle of the inner rail unfolding lock.

[0009] Further, for the above three-stage slide rail, the unlocking mechanism includes a push rod, which is slidably connected to the inner rail. One end of the push rod cooperates with the driving part of the inner rail unfolding lock, and the other end extends to the outer end of the inner rail. When the push rod is pushed inward at the outer end of the inner rail, the push rod pushes the driving part to make the inner rail unfolding lock rotate towards the second elastic member, and the baffle disengages from the card slot to release the locking between the middle rail and the inner rail.

[0010] Further, for the above three-stage slide rail, a first inclined surface is provided on the driving part, and a second inclined surface opposite to the first inclined surface is provided at one end of the push rod that cooperates with the driving part. The first inclined surface and the second inclined surface cooperate with each other, and a plurality of arc-shaped bosses are provided on the second inclined surface. Preferably, a guiding inclined surface is provided on one side of the card slot close to the driving part, and the guiding inclined surface is connected to the first inclined surface.

[0011] Further, for the above three-stage slide rail, the unlocking mechanism further includes an inner rail sliding member provided at the outer end of the inner rail. The inner rail sliding member is slidably connected to the inner rail and includes a main board and a pushing part protruding from the main board. The pushing part is provided in the middle of the main board; a T-shaped groove is provided at one end of the main board close to the push rod, and a T-shaped connecting part inserted into the T-shaped groove is provided at one end of the push rod close to the inner rail sliding member. The push rod is connected to the inner rail sliding member through the T-shaped connecting part.

[0012] Further, for the above three-stage slide rail, a plurality of kidney-shaped sliding holes one are provided on the push rod along the sliding direction of the push rod. The push rod is slidably connected to the inner rail through rivets inserted into the kidney-shaped sliding holes one; a plurality of kidney-shaped sliding holes two are further provided on the main board on both sides of the pushing part. The inner rail sliding member is slidably connected to the inner rail through rivets inserted into the kidney-shaped sliding holes two, and trapezoidal limiting bosses are provided on both sides of the middle part of the kidney-shaped sliding holes two.

[0013] Further, for the above three-stage slide rail, the unlocking mechanism further includes a elastic sheet provided at the outer end of the inner rail. The elastic sheet includes a hinged part provided in the middle of the elastic sheet and pressing plates and elastic plates provided on both sides of the hinged part. The hinged part is hinged to the inner rail, the pressing plates and the elastic plates are arranged at an angle, and the elastic plates are inserted into the pushing part of the inner rail sliding member and are elastic inclined plates that cooperate with the pushing part.

[0014] Further, for the above three-stage slide rail, the unlocking mechanism further includes a return spring and a spring seat. The spring seat is fixed on the inner side surface of the inner rail. A spring groove parallel to the push rod is provided on the spring seat. The return spring is arranged in the spring groove, and the inner side end of the return spring is connected to the side wall of the spring groove, and the outer side end is connected to the spring connecting part on the push rod; a sliding table parallel to the spring groove is provided on the spring seat, and a sliding groove connected to the spring connecting part is provided on the side surface of the push rod. The sliding groove is slidably connected to the sliding table.

[0015] Further, in the above three-stage slide rail, an unlocking handle is further provided on the deployed lock of the inner rail. The unlocking handle is connected to the driving part and extends towards the push rod.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: The locking and limiting member for realizing sequential movement in the present utility model has a simple structure, and the locking and unlocking processes are simple. The operation is stable and smooth. Moreover, an unfolding locking mechanism is provided, and the locking mechanism is stably locked and will not disengage from the card slot to unlock when subjected to the force in the moving direction of the slide rail, ensuring high safety. Additionally, a double unlocking mechanism is provided on the inner rail, which is convenient and fast to unlock and will not affect the locking performance of the locking mechanism due to accidental touch. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is an exploded schematic view of the three-stage slide rail of the present utility model;

[0019] Figure 2 is Figure 1 a partial enlarged schematic view of A in

[0020] Figure 3 is Figure 1 a partial enlarged schematic view of B in

[0021] Figure 4 is a schematic view of the inner side of the inner rail of the three-stage slide rail of the present utility model;

[0022] Figure 5 is a schematic view of the connection between the sliding member and the elastic piece of the inner rail of the three-stage slide rail of the present utility model;

[0023] Figure 6 is a schematic view of the closed state of the three-stage slide rail of the present utility model;

[0024] Figure 7 is a schematic view of the deployment and locking of the outer rail and the middle rail of the three-stage slide rail of the present utility model;

[0025] Figure 8 is a schematic view of the deployment and locking of the inner rail and the middle rail of the three-stage slide rail of the present utility model;

[0026] In the figure: 1. Outer rail; 11. First limiting convex platform; 2. Middle rail; 21. Baffle; 3. Inner rail; 31. Second limiting convex platform;

[0027] 4. Locking mechanism; 41. Inner rail expansion lock; 411. Card slot; 412. Driving part; 413. Limiting plate; 414. Guiding inclined plane; 415. Unlocking handle; 416. Limiting groove; 42. Second elastic part;

[0028] 5. Unlocking mechanism; 51. Push rod; 511. Arc-shaped boss; 512. T-shaped connecting part; 513. First kidney-shaped sliding hole; 514. Spring connecting part; 515. Sliding groove; 52. Inner rail sliding part; 521. Main board; 522. Pushing part; 523. T-shaped groove; 524. Second kidney-shaped sliding hole; 525. Trapezoidal boss; 53. Elastic sheet; 531. Hinged part; 532. Pressing plate; 533. Elastic plate; 54. Return spring; 55. Spring seat; 551. Sliding table;

[0029] 6. Locking and limiting part; 61. Middle rail expansion lock; 611. Upper limiting plate; 612. Lower limiting plate; 62. First elastic part;

[0030] 71. Outer ball strip; 72. Inner ball strip. Detailed implementation mode

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] Embodiment 1

[0033] Such as Figure 1-8As shown in the figure, a three-section slide rail includes an outer rail 1, a middle rail 2, and an inner rail 3 that are connected in sequence. There is an outer roller bar 71 between the outer rail 1 and the middle rail 2, and an inner roller bar 72 is provided between the middle rail 2 and the inner rail 3, making the sliding smoother and more stable. Moreover, a convex hull for restricting the outer roller bar 71 from sliding out of the outer rail 1 is provided at the inner side end of the middle rail 2 and the outer side end of the outer rail 1, and a restricting member for restricting the inner roller bar 72 is also provided on the middle rail 2. A stop block is provided at the inner side end of the outer rail 1, and a locking and limiting member 6 is provided at the inner side end of the middle rail 2. The locking and limiting member 6 includes a middle rail unfolding lock 61. The middle of the middle rail unfolding lock 61 is elastically rotatably connected to the middle rail 2. An upper limiting plate 611 that is vertically bent upward and inclined is provided on the upper side of one end, and a lower limiting plate 612 that is vertically bent downward is provided on the lower side of one end. That is, the upper limiting plate 611 and the lower limiting plate 612 are staggeredly arranged on the upper and lower sides of one end of the middle rail unfolding lock 61. An upward protruding limiting boss one 11 is provided in the middle of the outer rail 1, and a downward protruding limiting boss two 31 is provided at the inner side end of the inner rail 3. Inclined limiting guiding surfaces are provided on both the limiting boss one 11 and the limiting boss two 31, and the inclined directions of the limiting guiding surfaces of the limiting boss one 11, the limiting boss two 31, and the upper limiting plate 611 are the same. The cooperation between the limiting boss one 11 and the lower limiting plate 612 can lock the inner side end of the middle rail 2 in the middle of the outer rail 1 and unlock the locking connection between the inner side end of the middle rail 2 and the inner side end of the inner rail 3. The cooperation between the limiting boss two 31 and the upper limiting plate 611 can release the locking between the inner side end of the middle rail 2 and the middle of the outer rail 1 and lock the inner side end of the inner rail 3 at the inner side end of the middle rail 2.

[0034] In addition, as Figure 1-5 shown, a locking mechanism 4 is further provided at the inner side end of the inner rail 3. The locking mechanism 4 includes an inner rail unfolding lock 41. A baffle 21 that is vertically bent upward is provided at the outer side end of the middle rail 2. One end of the inner rail unfolding lock 41 is elastically rotatably connected to the inner rail 3. A rectangular card slot 411 for clamping with the baffle 21 is provided on one side of the middle part. When the baffle 21 is clamped in the card slot 411, the middle rail 2 and the inner rail 3 are unfolded and locked. An unlocking mechanism 5 is further provided on the side of the inner rail 3 facing the middle rail 2. The unlocking mechanism 5 cooperates with the inner rail unfolding lock 41 to release the unfolding lock between the middle rail 2 and the inner rail 3.

[0035] In the above structure, as Figure 1 shown, the locking and limiting member 6 further includes an elastic member one 62. The elastic member one 62 is a torsion spring. One end of it is sleeved on a pin, and the pin is fixed on the middle rail 2. The other end of the elastic member one 62 is provided with two crossed torsion bars. The bent part of one torsion bar is inserted into the jack of the middle rail unfolding lock 61, and the bent part of the other torsion bar is inserted into the jack of the middle rail 2. Moreover, the middle of the middle rail unfolding lock 61 is elastically rotatably connected to the middle rail 2 through a pin shaft and the elastic member one 62. Through the setting of the elastic member one 62 and the middle rail unfolding lock 61, the locking force in the locked state is ensured, and the torsion spring structure of the torsion bar is simple and convenient to install.

[0036] As Figure 1 shown, the locking mechanism 4 further includes a second elastic member 42, the second elastic member 42 is a torsion spring, one end of the second elastic member 42 is sleeved on a pin, this pin is fixed on the inner rail 3, the other end of the second elastic member 42 is provided with two torsion bars, one of the torsion bars abuts against the side wall of the inner rail 3, and the other torsion bar abuts against the inner rail unfolding lock 41. A limiting plate 413 is provided on the inner rail unfolding lock 41, and the limiting plate 413 and the side surface of the inner rail unfolding lock 41 close to the inner rail 3 form a step, and the torsion bar on the second elastic member 42 that abuts against the inner rail unfolding lock 41 is arranged in the step to ensure the connection between the second elastic member 42 and the inner rail unfolding lock 41; One end of the inner rail unfolding lock 41 is elastically rotatably connected to the inner rail 3 through a pin shaft and the second elastic member 42, and a limiting groove 416 for restricting the rotation angle of the inner rail unfolding lock 41 is further provided in the middle of the inner rail unfolding lock 41. Through the arrangement of the second elastic member 42, without increasing the applied force, the baffle 21 is firmly stuck at the bottom of the card slot 411, ensuring the firm locking of the inner rail 3 and the middle rail 2.

[0037] The sequential movement process of the three-section slide rail of the present utility model is as follows:

[0038] As Figure 6-8 shown, when unfolding, the outer rail 1, the middle rail 2, and the inner rail 3 are closed. Pull the product outward to open it. Since the inner end of the middle rail 2 is locked and connected to the inner end of the inner rail 3, the inner rail 3 and the middle rail 2 move outward together. When the middle rail 2 moves to the middle of the outer rail 1, the lower limiting plate 612 rotates towards the direction of the first elastic member 62 under the guiding drive of the limiting guiding surface of the first limiting boss 11. When the lower limiting plate 612 rotates a certain angle, the middle rail unfolding lock 61 can no longer rotate, and the lower limiting plate 612 slides out of the range of the first limiting boss 11 and resets under the action of the first elastic member. The inner end of the lower limiting plate 612 is blocked by the end surface of the first limiting boss 11 to limit the middle rail from moving inward. At this time, the outer ball strip 71 is restricted by the convex bulge on the outer rail 1 to prevent the middle rail from continuing to unfold outward, locking the inner end of the middle rail 2 to the middle of the outer rail 1. At the same time, the upper limiting plate 611 also rotates a certain angle and slides out from the limiting guiding surface of the second limiting boss 31. After sliding open, the inner end of the inner rail 3 is separated from the inner end of the middle rail 2, releasing the locking between the inner rail and the middle rail; Then continue to pull the product outward, and the inner rail 3 continues to unfold. When the inner end of the inner rail 3 moves to the outer end of the middle rail 2, the inner rail unfolding lock 41 collides with the baffle 21. Apply a certain external force, and the inner rail unfolding lock 41 overcomes the elastic force of the second elastic member 52 and slides open from the outside of the baffle 21 until the baffle 21 is stuck in the card slot 411. Since the card slot 411 is a rectangular slot with vertical sides on both sides, it cannot be disengaged from the card slot 411 under the action of the external force, so that the inner end of the inner rail 3 is locked to the outer end of the middle rail 2, realizing the unfolding lock.

[0039] As Figure 6-8As shown, when retraction is required, since the inner rail 3 and the middle rail 2 are in an extended and locked state, the unlocking mechanism 5 needs to be activated first to release the lock between the inner rail 3 and the middle rail 2. Then, push the product inward. Since the inner end of the middle rail 2 and the middle part of the outer rail 1 are in a locked state, the middle rail 2 does not move, and the inner rail 3 moves inward. When the second limiting boss 31 of the inner rail 3 moves to the upper limiting plate 611, the limiting guiding surface of the second limiting boss 31 drives the upper limiting plate 611 to rotate towards the elastic member 61 against the elastic force of the first elastic member 62. When the upper limiting plate 611 rotates by a certain angle, the lower limiting plate 612 leaves the end face of the first limiting boss and enters the limiting guiding surface of the first limiting boss until the lower limiting plate 612 disengages from the limiting guiding surface of the first limiting boss, and the lock between the inner end of the middle rail 2 and the middle part of the outer rail 1 is released. At the same time, the upper limiting plate 611 is reset under the action of the first elastic member 61 and is blocked by the limiting guiding surface of the second limiting boss 31, locking the inner end of the middle rail 2 and the inner end of the inner rail 3. Then, continue to push the product inward, and the inner rail 3 and the middle rail 2 move inward together until they are blocked by the stop block, and the middle rail 2 and the inner rail 3 are completely retracted.

[0040] In summary, it can be seen that the locking and limiting member for realizing sequential movement has a simple structure, a simple locking and unlocking process, stable and smooth operation; and an unfolding locking mechanism is provided, and the locking mechanism has stable locking and will not disengage from the card slot to release the lock when subjected to the force in the sliding rail movement direction, with high safety.

[0041] Embodiment 2

[0042] Based on the structure of Embodiment 1, as Figure 1 、 4 、5 shows, the unlocking mechanism 5 includes a push rod 51, the push rod 51 is slidably connected to the inner rail 3, one end of the push rod 51 is matched with the driving part 412 of the inner rail unfolding lock 41, and the other end extends to the outer end of the inner rail 3. Push the push rod 51 inward at the outer end of the inner rail 3, and the push rod 51 pushes the driving part 412 to make the inner rail unfolding lock 41 rotate towards the second elastic member 42, and the baffle 21 disengages from the card slot 411 to release the lock between the middle rail 2 and the inner rail 3.

[0043] In the above structure, as Figure 1 、 4 、5 shows, a first inclined surface is provided on the driving part 412, and an inclined surface two opposite to the first inclined surface is provided at one end of the push rod 51 in cooperation with the driving part 412. The first inclined surface and the inclined surface two are matched, and a plurality of arc-shaped bosses 511 are provided on the inclined surface two, so that the driving friction between the first inclined surface and the inclined surface two is reduced and the operation is more labor-saving. And a guiding inclined surface 414 is provided on one side of the card slot 411 close to the driving part 412, and the guiding inclined surface 414 is connected to the first inclined surface, which is convenient for the baffle 21 to accurately spring into the card slot 411 when the inner rail 3 unfolds.

[0044] When unlocking, the push rod 51 is pushed, and the wedge shape of the inclined surface 1 and the inclined surface 2 cooperate, so that the inner rail deployment lock 41 overcomes the elastic force of the elastic component 2 42 and rotates toward the elastic component 2 42, so that the baffle 21 is disengaged from the slot 411 to release the lock between the middle rail 2 and the inner rail 3. The push rod 51 is a long rod arranged in the inner rail 3, which is not easy to be accidentally touched, and the push rod 51 also extends to the outer end of the inner rail 3, which can facilitate the unlocking operation.

[0045] like Figure 1 , 4 As shown in Figure 5, the unlocking mechanism 5 also includes an inner rail sliding member 52 disposed at the outer end of the inner rail 3, the inner rail sliding member 52 is slidably connected to the inner rail 3, and includes a main board 521 and a pushing portion 522 protruding from the main board 521, the pushing portion 522 is disposed in the middle of the main board 521; the main board 521 is provided with a T-slot 523 at one end close to the push rod 51, the push rod 51 is provided with a T-shaped connecting portion 512 embedded in the T-slot 523 at one end close to the inner rail sliding member 52, and the push rod 51 is connected to the inner rail sliding member 52 via the T-shaped connecting portion 512. When unlocking, the push rod 51 is moved by pushing the pushing portion 52, and the operation is more convenient.

[0046] like Figure 1 , 3 -5, the push rod 51 is provided with a plurality of waist-shaped sliding holes 513 arranged along the sliding direction of the push rod 51, and the push rod 51 is slidably connected to the inner rail 3 through rivets inserted in the waist-shaped sliding holes 513; the main board 521 is also provided with a plurality of waist-shaped sliding holes 524 located on both sides of the pushing part 522, and the inner rail sliding member 52 is slidably connected to the inner rail 3 through rivets inserted in the waist-shaped sliding holes 524, and trapezoidal bosses 525 for limiting are provided on both sides of the middle part of the waist-shaped sliding holes 524. The pushing portion 52 is pushed with a certain force, so that the rivet overcomes the limiting effect of the trapezoidal boss 525, slides over the trapezoidal inclined surface of the trapezoidal boss 525 to the other section of the waist-shaped sliding hole 2 524, thereby pushing the push rod 51 to move; the waist-shaped sliding hole 1 513 and the waist-shaped sliding hole 2 524 can limit the moving stroke of the push rod 51, ensuring the cooperation between the push rod 51 and the driving portion 412, and the trapezoidal boss 525 can prevent the pushing portion 522 from being accidentally touched to cause the inner rail sliding member 52 to move, and has a certain locking effect.

[0047] In addition, if Figure 1 , 3As shown in Figure 5, the unlocking mechanism 5 further includes a shrapnel 53 disposed at the outer end of the inner rail 3. The shrapnel 53 includes a hinge portion 531 disposed in the middle of the shrapnel 53, and pressing plates 532 and elastic plates 533 disposed on both sides of the hinge portion 531. The hinge portion 531 is hinged to the inner rail 3. The pressing plates 532 and the elastic plates 533 are arranged at an angle. The elastic plate 533 is inserted into the pushing portion 522 of the inner rail slider 52 and is an elastic inclined plate that cooperates with the pushing portion 522. When unlocking, press the pressing plate 532 to rotate the elastic plate 533 towards the pushing portion 522 of the inner rail slider, so that the pushing portion 522 slides away from the shrapnel 53, further improving the operation convenience; and the pressing direction is perpendicular to the moving direction of the push rod 51, and the unlocking mechanism will not be actuated due to accidental contact with the inner rail 3, affecting the locking performance of the locking mechanism.

[0048] As shown in Figure 1 , 2 , 4, and 5, the unlocking mechanism 5 further includes a return spring 54 and a spring seat 55. The spring seat 55 is fixed on the inner side surface of the inner rail 3. The spring seat 55 is provided with a spring groove parallel to the push rod 51. The return spring 54 is disposed in the spring groove, and the inner end of the return spring 54 is connected to the side wall of the spring groove, and the outer end is connected to the spring connection portion 514 on the push rod 51. Through the setting of the return spring 54, the push rod 51 can be automatically reset after the push rod 51 is unlocked.

[0049] In the above structure, as shown in Figure 2 , the spring seat 55 is provided with a sliding table 551 parallel to the spring groove. The side surface of the push rod 51 is provided with a sliding groove 515 connected to the spring connection portion 514. The sliding groove 515 is slidably connected to the sliding table 551. Through the setting of the sliding groove 515 and the sliding table 551, the movement of the push rod 51 is guided, so that the moving direction of the push rod 51 is accurate, ensuring the stability of the unlocking action; and the spring seat 55 is made of plastic, and the push rod 51 is made of metal with better wear resistance than the spring seat 55, reducing the wear of the push rod 51, reducing the maintenance cost, and ensuring the service life of the slide rail.

[0050] Embodiment 3

[0051] Based on the structure of Embodiment 1 or 2, as shown in Figure 1 , 4 , 5, and 8, the inner rail unfolding lock 41 is further provided with an unlocking handle 415. The unlocking handle 415 is connected to the driving portion 412 and extends towards the push rod 51. The unlocking handle 415 and the unlocking mechanism 5 are combined into a double unlocking device. By pressing the unlocking handle 415, the inner rail unfolding lock 41 can be rotated towards the elastic member 42, directly disengaging the baffle 21 from the card slot 411 to complete the unlocking, which is convenient for installation and maintenance.

[0052] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0053] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A three-section slide rail, comprising an outer rail, a middle rail and an inner rail connected in sequence, wherein a stop block is provided at the inner end of the outer rail, and characterized in that: The inner end of the middle rail is provided with a locking limit piece, and the locking limit piece includes a middle rail deployment lock, and the middle part of the middle rail deployment lock is elastically rotatably connected to the middle rail, and an upper limit plate is provided on the upper side of one end thereof, which is vertically bent upward and inclined, and a lower limit plate is provided on the lower side of one end thereof, and a limiting boss 1 protruding upward is provided in the middle part of the outer rail, and a limiting boss 2 protruding downward is provided on the inner end of the inner rail, and an inclined limiting guide surface is provided on the limiting boss 1 and the limiting boss 2; the limiting boss 1 cooperates with the lower limiting plate to lock the inner end of the middle rail in the middle of the outer rail, and unlock the inner end of the middle rail and the inner end of the inner rail. Locking connection; the second limiting boss cooperates with the upper limiting plate to release the lock of the inner end of the middle rail and the middle part of the outer rail, and locks the inner end of the inner rail to the inner end of the middle rail; the inner end of the inner rail is also provided with a locking mechanism, and the locking mechanism includes an inner rail deployment lock, the outer end of the middle rail is provided with a baffle plate bent vertically upward, one end of the inner rail deployment lock is elastically rotatably connected to the inner rail, and a rectangular slot engaged with the baffle plate is provided on one side of the middle part, and when the baffle plate is engaged in the slot, the middle rail and the inner rail are deployed and locked; the side of the inner rail facing the middle rail is also provided with an unlocking mechanism, and the unlocking mechanism cooperates with the inner rail deployment lock to release the deployment lock of the middle rail and the inner rail.

2. The three-section slide rail according to claim 1, characterized in that: The locking limiter also includes an elastic member 1, which is a torsion spring, one end of which is sleeved on the pin, and the other end is provided with two crossed torsion bars, wherein the bent portion of one torsion bar is inserted into the insertion hole of the middle rail deployment lock, and the bent portion of the other torsion bar is inserted into the insertion hole of the middle rail, and the pin is fixed on the middle rail; and the middle part of the middle rail deployment lock is elastically rotatably connected with the middle rail through a pin shaft and an elastic member 1.

3. The three-section slide rail according to claim 1, characterized in that: The locking mechanism also includes an elastic member 2, which is a torsion spring. One end of the elastic member 2 is sleeved on the pin, and the other end is provided with two torsion bars, one of which abuts against the side wall of the inner rail, and the other abuts against the inner rail deployment lock. A limiting plate is provided on the inner rail deployment lock, and the limiting plate and the side surface of the inner rail deployment lock close to the inner rail form a step, and the torsion bar on the elastic member 2 abutting against the inner rail deployment lock is arranged in the step; one end of the inner rail deployment lock is elastically rotatably connected to the inner rail through a pin shaft and the elastic member 2, and a limiting groove for limiting the rotation angle of the inner rail deployment lock is also provided in the middle of the inner rail deployment lock.

4. The three-section slide rail according to claim 1, characterized in that: The unlocking mechanism includes a push rod, which is slidably connected to the inner rail. One end of the push rod cooperates with a driving part of the inner rail deployment lock, and the other end extends to the outer end of the inner rail. The push rod is pushed inward at the outer end of the inner rail, and the push rod pushes the driving part to make the inner rail deployment lock rotate toward the second elastic member, and the baffle disengages from the slot to release the lock of the middle rail and the inner rail.

5. The three-section slide rail according to claim 4, characterized in that: The driving part is provided with a first inclined surface, and one end of the push rod that cooperates with the driving part is provided with a second inclined surface arranged opposite to the first inclined surface. The first inclined surface cooperates with the second inclined surface, and the second inclined surface is provided with a plurality of arc-shaped bosses.

6. The three-section slide rail according to claim 4, characterized in that: The unlocking mechanism also includes an inner rail sliding member arranged at the outer end of the inner rail, the inner rail sliding member is slidably connected to the inner rail, and includes a main board and a pushing portion protruding from the main board, and the pushing portion is arranged in the middle of the main board; a T-shaped slot is provided at one end of the main board close to the push rod, and a T-shaped connecting portion is provided at one end of the push rod close to the inner rail sliding member, and the push rod is connected to the inner rail sliding member via the T-shaped connecting portion.

7. The three-section slide rail according to claim 6, characterized in that: The push rod is provided with a plurality of waist-shaped sliding holes 1 arranged along the sliding direction of the push rod, and the push rod is slidably connected to the inner rail through a rivet inserted in the waist-shaped sliding hole 1; the main board is also provided with a plurality of waist-shaped sliding holes 2 located on both sides of the pushing part, and the inner rail sliding part is slidably connected to the inner rail through rivets inserted in the waist-shaped sliding hole 2, and trapezoidal limiting bosses are provided on both sides of the middle part of the waist-shaped sliding hole 2.

8. The three-section slide rail according to claim 6, characterized in that: The unlocking mechanism also includes a spring sheet arranged at the outer end of the inner rail, and the spring sheet includes a hinged portion arranged in the middle of the spring sheet and a pressing plate and a spring plate arranged on both sides of the hinged portion. The hinged portion is hinged to the inner rail, and the pressing plate and the spring plate are arranged at an angle. The spring plate is inserted into the pushing portion of the inner rail sliding member and is an elastic inclined plate that cooperates with the pushing portion.

9. The three-section slide rail according to any one of claims 4 to 8, characterized in that: The unlocking mechanism also includes a return spring and a spring seat. The spring seat is fixed to the inner side of the inner rail. The spring seat is provided with a spring groove arranged parallel to the push rod. The return spring is arranged in the spring groove, and the inner end of the return spring is connected to the side wall of the spring groove, and the outer end is connected to the spring connecting part on the push rod; the spring seat is provided with a slide arranged parallel to the spring groove, and the side of the push rod is provided with a slide groove connected to the spring connecting part, and the slide groove is slidably connected to the slide.

10. The three-section slide rail according to claim 1, 4 or 8, characterized in that: The inner rail deployment lock is also provided with an unlocking handle, which is connected to the driving part and extends toward the push rod.

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