Three-section slide rail with locking structure adjustable

Abstract

This invention discloses an adjustable three-section slide rail with a locking structure, comprising an inner rail, a middle rail, and an outer rail arranged sequentially from top to bottom. The right end of the outer rail is formed into an arc-shaped wall, with a first inwardly protruding bulge in the middle of the arc-shaped wall. The right end of the inner rail is provided with a locking structure, which includes a rotating wheel arranged sequentially from bottom to top and a rotating wheel positioning component for mounting the rotating wheel. The rotating wheel positioning component has adjusting arms on its front and rear sides for adjusting the front and rear distance. The rotating wheel is provided with two sets of mutually symmetrical inner wheel teeth and several gear slots. The size of the gear slots decreases sequentially along the circumference of the rotating wheel shaft hole. The rotating wheel positioning component is also provided with two symmetrical locking points that match the gear slots. Rotating the rotating wheel can adjust the gear position to adjust the distance between the two adjusting arms, thereby adjusting the tightness between the inner and outer rails and improving the safety factor.

Description

Technical Field

[0001] This invention relates to the field of slide rail technology, and in particular to a three-section slide rail with an adjustable locking structure. Background Technology

[0002] In existing technology, drawer slides, also known as guide rails or slide tracks, refer to hardware connection components fixed to the cabinet body of furniture, allowing drawers or cabinet panels to move in and out. Drawer slides are suitable for connecting drawers in wooden and steel furniture such as cabinets, furniture, filing cabinets, and bathroom cabinets. There are two types of drawer slides: one is for furniture and everyday hardware, and the other is extra-large drawer slides for industrial use. This type of drawer slide has a larger load-bearing capacity and is used in industrial applications such as modified vehicles, RVs, server racks, and fire trucks.

[0003] The existing technology provides a Chinese utility model patent with authorization announcement number CN 209547482 U and patent name "Three-Section Ball Bearing Slide Rail". According to paragraph 44 of the specification of this utility model, the implementation principle of the solution is as follows: When the drawer is fully opened and the first part and the second part are engaged, the fixed part comes into contact with the second part under the action of the pulling force. When the fixed part and the second part come into contact, an impact force is generated. Under the action of the impact force, the elastic part is compressed. Then, the second part is engaged between the first and second locking blocks under the action of the first locking block and the second locking block. When the drawer is closed and the first part and the second part are separated, the elastic part is compressed under the action of the pushing force. The second locking block slides off the second part to contact the engagement between the first and second parts, so that the movable slide rail and the middle slide rail can slide normally.

[0004] The drawback of the aforementioned existing technology is that there is no locking structure between the inner and outer rails at the drawer opening when the drawer is closed, which poses a certain safety hazard. If a heavy object inside the drawer suddenly slides out of position, causing the drawer to lose its original balance, the slide rail will automatically slide outward and potentially hit or injure people. Summary of the Invention

[0005] The purpose of this invention is to provide a three-section slide rail with an adjustable locking structure to solve the technical problem of potential safety hazards caused by the lack of a locking structure between the inner and outer rails at the drawer opening.

[0006] To achieve the above objectives, the present invention provides a three-section slide rail with an adjustable locking structure, comprising an inner rail, a middle rail, and an outer rail arranged sequentially from top to bottom, and further comprising a first sliding component and a second sliding component. The outer rail has a first sliding groove adapted to the middle rail, and the middle rail has a second sliding groove adapted to the inner rail. The inner rail slides left and right with the second sliding groove via the first sliding component, and the middle rail slides left and right with the first sliding groove via the second sliding component. The right side walls of the outer rail are respectively provided with inwardly protruding arc-shaped walls, with an inwardly protruding first bulge in the middle of each arc-shaped wall. The right end of the inner rail is provided with a locking structure, which includes a rotating wheel arranged sequentially from bottom to top and a rotating wheel positioning component for mounting the rotating wheel. The rotating wheel positioning component has adjusting arms on its front and rear sides for adjusting the front-to-back distance. The adjusting arms can form a limiting contact with the first convex bulge. The rotating wheel has two arc-shaped grooves on the side near the rotating wheel positioning component. The side of the arc-shaped grooves near the rotating wheel shaft hole has several sequentially distributed gear slots. The two arc-shaped grooves each have two sets of mutually centrally symmetrical inner gear teeth. The gear slots and the inner gear teeth are spaced apart. The size of the gear slots decreases sequentially along the circumference of the rotating wheel shaft hole. The rotating wheel positioning component also has two symmetrical locking points that match the gear slots between the inner gear teeth. Rotating the rotating wheel can adjust the gear position to adjust the distance between the two adjusting arms, thereby adjusting the tension between the inner and outer rails.

[0007] Furthermore, the inner rail has a first positioning hole at its right end, and the rotating wheel positioning component has a through hole at the corresponding position on its right end. The rotating wheel positioning component is mounted on the inner rail by rivets.

[0008] Furthermore, the rotating wheel positioning component has a movable opening in the middle, and a riveting hole is provided on the inner rail at a position corresponding to the movable opening. The riveting hole is rotatably connected to the rotating wheel shaft hole by a rivet. The left end of the rotating wheel positioning component is set in a "V" shape, and the opening direction of the "V" shape can be set to face left or right. The "V" shape is set on the left side of the movable opening.

[0009] Furthermore, the two symmetrical locking points and the two adjusting arms protrude upward relative to the rotating wheel positioning component, with the two locking points located on the inner sides of the two adjusting arms respectively.

[0010] Furthermore, the tooth height of the two sets of inner gear teeth of the rotating wheel decreases sequentially along the circumferential direction of the rotating wheel shaft hole, and the rotating wheel is a gear with a number of outer gear teeth distributed on its outer circumference.

[0011] Furthermore, a first limiting block is fixedly installed on the middle left side of the outer rail to limit the range of leftward movement of the middle rail.

[0012] Furthermore, second limiting blocks are fixedly provided on the front and rear sides of the left end face of the middle rail. The second limiting blocks on the front and rear sides are bent and protruded along the side close to the inner wall of the outer rail to limit the range of leftward movement of the second sliding component.

[0013] Furthermore, a third limiting block is fixedly provided on the right side of the outer rail, and the third limiting blocks on the front and rear sides are respectively bent and protruded along the side close to the outer wall of the middle rail to limit the range of rightward movement of the second sliding component.

[0014] Furthermore, a third upward-protruding bulge is provided on the left side of the central rail to limit the range of leftward movement of the first sliding component.

[0015] Furthermore, the second sliding component includes a plurality of balls and an integrally formed plastic ball nest, wherein the plurality of balls are movably disposed on the plastic ball nest, and the inner rail is connected to the middle rail through the plurality of balls; the first sliding component includes a plurality of balls and an integrally formed welded ball nest, wherein the plurality of balls are movably disposed on the welded ball nest, and the middle rail is connected to the outer rail through the plurality of balls.

[0016] In summary, the technical solution of the present invention has the following beneficial effects: The structure of the present invention is reasonable. (1) By setting the size of the two sets of gear slots to decrease in a clockwise or counterclockwise direction along the circumference of the rotating wheel shaft hole, different gears are created. Moreover, the two sets of gear teeth are symmetrical to each other. At this time, two locking points that are compatible with the gear slots are symmetrically arranged on the rotating wheel positioning component. Rotating the rotating wheel can simultaneously drive its inner gear teeth to rotate, so that the two locking points will also be locked into the gear slots of the corresponding gear teeth to adjust the amplitude of the two adjusting arms to stretch outward, thereby realizing the adjustment of the front and rear distance of the adjusting arms (the rotating wheel positioning component can be a plastic part or other elastic component, so as to better adjust the distance). (2) By setting the right end of the outer rail into an arc-shaped wall that is compatible with the locking structure, and setting the first protrusion in the middle of the arc-shaped wall to cooperate with the adjusting arm of the inner rail, the inner rail can be blocked from moving to the right by setting the first protrusion. The gear can be easily adjusted by rotating the rotating wheel, thereby adjusting the magnitude of the sliding friction force that pulls the inner rail out of the outer rail. It is easy to use and greatly improves the safety factor of the slide rail. That is, when the rotating wheel is rotated to the low gear, only a small sliding friction force is needed to easily pull the inner rail out of the outer rail, while when the rotating wheel is rotated to the high gear, a larger sliding friction force is needed to pull the inner rail out of the outer rail. Users can select the appropriate gear for clamping according to actual needs. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the process of the inner rail sliding to the right in this invention;

[0019] Figure 3 This is a structural schematic diagram of another side of the inner rail of the present invention;

[0020] Figure 4 yes Figure 3 Detailed enlarged schematic diagram;

[0021] Figure 5 This is a structural diagram of the other side of the rotating wheel;

[0022] Figure 6 yes Figure 3 A structural diagram without the rotating wheel;

[0023] Figure 7 yes Figure 6 Detailed enlarged diagram of C;

[0024] Figure 8 yes Figure 6 Detail B, enlarged schematic diagram;

[0025] Figure 9 This is an exploded structural diagram of the present invention;

[0026] Figure 10 yes Figure 9 Detail A enlarged diagram;

[0027] Figure 11 This is a schematic diagram of the structure of the fourth limiting block of the present invention.

[0028] Explanation of reference numerals in the attached drawings: 1-Inner rail, 101-First positioning hole, 102-Guide opening, 103-Second recess; 104-Stop arm assembly, 1041-First stop arm, 10411-Abutting surface, 1042-Second stop arm, 1043-Third stop arm, 1044-Rotating shaft, 1045-Modular included angle, 105-Third slide groove; 2-Middle rail, 201-Second limiting block, 202-Third protrusion; 203-Fourth limiting block, 2031-Slot, 2032-Limiting protrusion, 2033-Fifth limiting block, 2034-Fourth slide groove; 204-Second slide groove; 3- Outer rail, 301-arc-wall, 3011-first convex bulge, 302-first limiting block, 303-third limiting block, 304-first sliding groove, 307-riveting hole; 4-first sliding component; 5-second sliding component; 6-locking structure, 601-rotating wheel, 6011-arc-groove, 60111-ring, 6012-inner wheel tooth, 6013-blocking wall, 6014-outer wheel tooth; 602-rotating wheel positioning component, 6021-adjusting arm, 6022-locking point, 6023-"V" shape, 6024-through hole, 6025-movable opening; 7-rivet, 8-ball bearing. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, but this does not constitute a limitation on the scope of protection of the present invention.

[0030] In this invention, for clarity, the following description is provided: The observer faces the attached... Figure 1 When observing, the observer's left side is designated as left, the observer's right side as right, the observer's front as down, the observer's rear as up, the observer's top as front, and the observer's bottom as back. It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below" used in this document indicate orientations or positional relationships based on the accompanying drawings. These are merely for the purpose of clearly describing the invention and do not indicate or imply that the structures or components referred to must have a specific orientation or be constructed in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.

[0031] See Figures 1 to 11This embodiment provides a three-section slide rail with an adjustable locking structure, including an inner rail 1, a middle rail 2, and an outer rail 3 arranged sequentially from top to bottom. It also includes a first sliding component 4 and a second sliding component 5. The outer rail 3 has a first sliding groove 304 adapted to the middle rail 2, and the middle rail 2 has a second sliding groove 204 adapted to the inner rail 1. The inner rail 1 slides left and right with the second sliding groove 204 via the first sliding component 4, and the middle rail 2 slides left and right with the first sliding groove 304 via the second sliding component 5. The right side walls of the outer rail 3 are respectively provided with inwardly protruding arc-shaped walls 301, with an inwardly protruding first bulge 3011 in the middle of each arc-shaped wall 301. The right end of the inner rail 1 is provided with a locking structure 6, which includes a rotating wheel 601 arranged sequentially from bottom to top, and a rotating wheel positioning component 602 for mounting the rotating wheel 601. The rotating wheel positioning component 602 has front and rear sides respectively provided for adjusting the front and rear distance. The adjusting arm 6021 can form a limiting contact with the first protrusion 3011. The rotating wheel 601 has two arc-shaped grooves 6011 on the side near the rotating wheel positioning member 602. Several sequentially distributed stop grooves 60111 are provided on the side of the arc-shaped grooves 6011 near the shaft hole of the rotating wheel 601. Two sets of mutually centrally symmetrical inner gear teeth 6012 are respectively provided inside the two arc-shaped grooves 6011. The several stop grooves 60111 and the several inner gear teeth... The gears are spaced 6012 apart, and the size of several gear slots 60111 decreases sequentially along the circumference of the shaft hole of the rotating wheel 601. The rotating wheel positioning component 602 is also provided with two symmetrical locking points 6022. The locking points 6022 are adapted to the gear slots 60111 between the inner wheel teeth 6012. Thus, rotating the rotating wheel 601 can realize the gear adjustment, thereby adjusting the distance between the two front and rear adjusting arms 6021, and thus realizing the tension adjustment between the inner rail 1 and the outer rail 3.Functions: (1) By setting the size of the two sets of gear slots to decrease clockwise or counterclockwise along the circumference of the rotating wheel shaft hole, different gears are created. Moreover, the two sets of gear teeth are symmetrical to each other. At this time, the rotating wheel positioning part is symmetrically set with two locking points that are compatible with the gear slots. Rotating the rotating wheel can simultaneously drive its inner gear teeth to rotate, so that the two locking points will also be locked into the gear slots of the corresponding gear teeth to adjust the amplitude of the two adjusting arms to stretch outward, thereby realizing the adjustment of the front and rear distance of the adjusting arms (the rotating wheel positioning part can be a plastic part or other elastic component, so as to better adjust the distance); (2) By setting the right end of the outer rail as The arc-shaped wall is adapted to the locking structure, and a first protrusion is set in the middle of the arc-shaped wall to cooperate with the adjusting arm of the inner rail. The first protrusion prevents the inner rail from moving to the right. The gear can be easily adjusted by rotating the rotating wheel, thereby adjusting the sliding friction force required to pull the inner rail off the outer rail. This simplifies use and greatly improves the safety factor of the slide rail. Specifically, when the rotating wheel is turned to the low gear, only a small amount of sliding friction is needed to easily pull the inner rail off the outer rail, while when the rotating wheel is turned to the high gear, a larger amount of sliding friction is required. Users can select the appropriate gear for locking according to their actual needs. See also... Figure 1-7 In practical applications, (1) the lower surface of the rotating wheel 601 is marked with the numbers 1-6 in a clockwise or counterclockwise direction, representing six different gears. The larger the gear, the wider the adjusting arm 6021 is opened, and the tighter the inner rail 1 is locked on the outer rail 3; (2) the lower surface of the rotating wheel 601 is also marked with a clockwise arrow, indicating that when the distance between the two adjusting arms 6021 is increased, the knob of the rotating wheel 601 is turned clockwise, and when the distance between the two adjusting arms 6021 is decreased, the knob of the rotating wheel 601 is turned counterclockwise; (3) the lower surface of the two adjusting arms 6021 on the rotating wheel positioning part 602 is marked with arrows pointing to the rotating wheel 601, so that the operator can check the current gear status and judge the magnitude of the locking force.

[0032] See Figure 5 , 7 In practical applications, the number of 6012 teeth in each of the two sets is set to five. See [link / reference] Figure 5 , 7In practical applications, the rotating wheel 601 achieves a locking effect by engaging the two locking points 6022 on the rotating wheel positioning member 602 into the gear slot 60111, thereby achieving the stopping effect of the inner rail 1 on the outer rail 3. The two sets of inner wheel teeth 6012 of the present invention are symmetrically arranged in the two arc-shaped grooves 6011, and the two locking points 6022 are also symmetrically distributed. The connection between the two arc-shaped grooves 6011 of the present invention is provided with a blocking wall 6013. Therefore, the locking points 6022 only operate on their respective sets of wheel teeth 6012, complementing each other. With the setting of the blocking wall 6013, and the fact that there are five wheel teeth 6012 in each set, each set of wheel teeth 6012 has six locking slots (gear slots 60111), which means that six gears can be selected.

[0033] Specifically, the inner rail 1 has a first positioning hole 101 at its right end, and the rotating wheel positioning component 602 has a through hole 6024 at the corresponding position on its right end. The rotating wheel positioning component 602 is mounted on the inner rail 1 by rivets 7. See also Figure 1 , 7 In practical applications, the rotating wheel positioning component 602 is first initially positioned on the inner rail 1 by rivets 7. Then, the rotating wheel 601 is placed on the rotating wheel positioning component 602, and the rotating wheel 601 is riveted to the inner rail 1 by another rivet 7. At this time, the rotating wheel 601 can be manually rotated clockwise or counterclockwise, thereby causing the rotating wheel positioning component 602 to be stretched outward or pressed inward. Note: Riveting includes movable riveting and fixed riveting. Movable riveting is not a rigid connection; the connecting parts of movable riveting can rotate relative to each other.

[0034] Specifically, the rotating wheel positioning component 602 has a movable opening 6025 in the middle. A riveting hole 307 is provided on the inner rail 3 at a position corresponding to the movable opening 6025. The riveting hole 307 is rotatably connected to the shaft hole of the rotating wheel 601 via a rivet 7. The left end of the rotating wheel positioning component 602 is shaped like a "V" 6023. The opening direction of the "V" 6023 can be set to the left or right, and the "V" 6023 is located to the left of the movable opening 6025. Function: By shaped the left end of the rotating wheel positioning component 602 into a "V" 6023, it is beneficial to fully utilize the elastic stretching or compression of the rotating wheel positioning component 602, so as to easily expand outward or compress the adjusting arm 6021 of the rotating wheel positioning component 602, thereby allowing easy gear adjustment when manually rotating the rotating wheel 601. See also... Figure 7 As a preferred option, the opening direction of the "V" shape 6023 in this design is set to face left.

[0035] Specifically, the two symmetrical locking points 6022 and the two adjusting arms 6021 protrude upward relative to the rotating wheel positioning component 602, and the two locking points 6022 are located on the inner side of the two adjusting arms 6021 respectively.

[0036] Specifically, the tooth height of the two sets of inner gear teeth 6012 of the rotating wheel 601 decreases sequentially along the circumferential direction of the shaft hole of the rotating wheel 601, and the rotating wheel 601 is a gear with a number of outer gear teeth 6014 distributed on its outer circumference. In practical applications, the greater the tooth height, the deeper the gear slot 60111, and the tighter the fit between the locking point 6022 and the gear slot 60111.

[0037] Specifically, a first limiting block 302 is fixedly installed at the middle left side of the outer rail 3 to limit the leftward movement of the middle rail 2. See also Figure 2 In practical applications, during the leftward movement of the middle rail 2, its left end face abuts against the first limiting block 302 of the outer rail 3, thereby restricting the leftward movement of the middle rail 2. Preferably, the left end of the inner rail 1 is configured as a guide opening 102 adapted to the first limiting block 302. The opening direction of the guide opening 102 is to the left, and the opening of the guide opening 102 gradually increases from right to left, so that the inner rail 1 can easily accommodate the first limiting block 302 as it moves to the left along the guide opening 102.

[0038] Specifically, a second limiting block 201 is fixedly installed on the front and rear sides of the left end face of the middle rail 2. The second limiting blocks 201 on the front and rear sides are bent and protruded along the side close to the inner wall of the outer rail 3 to limit the range of the second sliding component 5 to move to the left.

[0039] Specifically, a third limiting block 303 is fixedly installed on the right side of the outer rail 3. The third limiting blocks 303 on both the front and rear sides are bent and protruded along the side closest to the outer wall of the middle rail 2 to limit the rightward movement of the second sliding component 5. Function: By setting the second limiting block 201 and the third limiting block 303, the left and right movement of the second sliding component 5 can be limited.

[0040] Specifically, a third convex bulge 202 protrudes upward on the left side of the middle rail 2 to limit the leftward movement of the first sliding component 4. In practical applications, the third convex bulge 202 restricts the leftward movement of the first sliding component 4. Since the first sliding component 4 is the medium for the relative sliding of the inner rail 1 and the middle rail 2, the third convex bulge 202 locks the inner rail 1 in position relative to the leftward sliding of the middle rail 2, causing the inner rail 1 to slide to the left along with the middle rail 2 until the middle rail 2 abuts against the first limiting block 302. Then, the locking structure 6 is adjusted to lock the inner rail 1 onto the outer rail 3.

[0041] Specifically, the second sliding component 5 includes several ball bearings 8 and an integrally molded plastic ball socket. The ball bearings 8 are movably disposed on the plastic ball socket, and the inner rail 1 is connected to the middle rail 2 through the ball bearings 8. The first sliding component 4 includes several ball bearings 8 and an integrally molded welded ball socket. The ball bearings 8 are movably disposed on the welded ball socket, and the middle rail 2 is connected to the outer rail 3 through the ball bearings 8. Function: The integrally molded plastic ball socket and welded ball socket greatly reduce the number of parts, and assembly is simple and cost-effective.

[0042] To provide a clearer and more complete explanation and facilitate understanding, the following will introduce another major innovation: the locking structure between the inner and outer rails at the drawer opening.

[0043] Preferably, as shown in 9-11, a fourth limiting block 203 is fixedly installed at the right end of the middle rail 2. The fourth limiting block 203 has a fourth sliding groove 2034 adapted to the inner rail 1. The inner rail 1 passes through the second sliding groove 204 and the fourth sliding groove 2034 sequentially to the right. A limiting protrusion 2032 is fixedly installed on the inner side wall of the fourth sliding groove 2034. A second recess 103 is provided on one side wall at the right end of the inner rail 1. The second recess 103 can engage with the limiting protrusion 2032 for limiting, thereby driving the middle rail 2 to slide to the right. Function: By using the fourth limiting block 203 fixedly installed at the right end of the middle rail 2 and the corresponding second recess 103 on the inner rail 1, a limiting engagement between the inner rail 1 and the middle rail 2 is achieved. The structure is simple, the cost is low, and the safety factor is improved to a certain extent. See also... Figure 10-11 In practical applications, when the operator pulls the drawer outward, the inner rail 1 and the middle rail 2 temporarily form a whole due to the cooperation between the second recess 103 and the limiting protrusion 2032. When this whole moves to the limit position, the outer rail 1 will lock the middle rail 2. Moreover, when the sliding friction of pulling the drawer is greater than the blocking force of the second recess 103, the inner rail 1 will slide to the right from the middle rail 2, thereby realizing the layered sliding of the three sections of the slide rail.

[0044] Specifically, a fifth limiting block 2033 is fixedly installed on the left side of the limiting protrusion 2032. A third sliding groove 105 is provided inside the inner rail 1. A stop arm assembly 104 is riveted to the left side of the third sliding groove 105. The stop arm assembly 104 includes a rotatable first stop arm 1041. A stop surface 10411 is provided on the right side of the first stop arm 1041. The inner rail 1 can be limited and engaged with the fifth limiting block 2033 through the stop surface 10411. (See also...) Figure 6 , 8 11. In practical applications, when the inner rail 1 slides to the right on the middle rail 2 to a certain extent, the inner rail 1 is locked in place with the middle rail 2 by the abutment surface 10411 to restrict the inner rail 1 from continuing to move to the right.

[0045] Specifically, the stop arm assembly 104 further includes a second stop arm 1042, a third stop arm 1043, and a rotating shaft 1044. The second stop arm 1042 and the first stop arm 1041 are respectively fixedly disposed on the two side walls of the third stop arm 1043. The left side of the third stop arm 1043 is rotatably engaged with the third slide groove 105 via the rotating shaft 1044. The second stop arm 1042 abuts against the inner wall of the inner rail 1. There is a movable included angle 1045 between the second stop arm 1042 and the third stop arm 1043. The rightward extension length of the third stop arm 1043 is greater than the rightward extension lengths of the second stop arm 1042 and the first stop arm 1041, to facilitate operator use. See also Figure 8 In practical application, the operator can easily drive the first stop arm 1041 fixed on the third stop arm 1043 to swing together by moving the third stop arm 1043, thereby releasing the limiting cooperation between the blocking surface 10411 and the fifth limiting block 2033. Then, the inner rail 1 can be detached by gently pulling it.

[0046] Specifically, the front and rear ends of the left side wall of the fourth limiting block 203 are respectively provided with leftward extending slots 2031. The two slots 2031 can be locked and limited with the front and rear sides of the right end of the first sliding component 4 to restrict the rightward movement of the first sliding component 4. See Figure 11 In practical applications, the size of the slot 2031 increases from right to left, which makes it easy to lock the position of the first sliding component 4 to the right.

[0047] The working principle of the present invention is as follows: (1) The outer rail is fixed to the table, while the inner rail is fixed to the drawer; (2) When the drawer is opened, the operator pulls the drawer out with force. When the pulling force is greater than the locking force of the adjusting arm 6021 and the first protrusion 3011, the inner rail 1 can slide to the right along with the middle rail 2 through the second sliding member 5 until the second sliding member 5 slides to the third limiting block 303, at which point the middle rail 2 stops sliding to the right; when the pulling force at this time is greater than the locking force of the second recess 103 and the limiting protrusion 2032, the inner rail 1 slides to the right alone through the first sliding member 4 until the first stop arm 1041 on the inner rail 1 is engaged with the fifth limiting block 2033 to stop sliding to the right, thereby achieving layered sliding; (3) At this time, if the operator wants to remove the inner rail 1 from the middle rail 2, (3) When the drawer is closed, the operator pushes the drawer and the inner rail 1 slides to the left along the slide rail of the middle rail 2 through the first sliding part 4 until the first sliding part 4 is blocked by the third protrusion 202. At this time, the second recess 103 on the inner rail 1 and the limiting protrusion 2032 on the middle rail 2 are locked together. The inner rail 1 then slides to the left along the middle rail 2 through the second sliding part 5 until the inner rail 1 is locked to the outer rail 3 by the locking structure 6. (4) When the drawer is closed, the operator pushes the drawer and the inner rail 1 slides to the left along the slide rail of the middle rail 2 through the first sliding part 4 until the inner rail 1 is locked to the outer rail 3 by the locking structure 6. (5) When the operator twists the rotating wheel 601, the adjusting arm 6021 on the rotating wheel positioning part 602 can be adjusted to realize the tightness adjustment of the inner rail 1 and the outer rail 3.

[0048] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A three-section slide rail with an adjustable locking structure, comprising an inner rail (1), a middle rail (2), and an outer rail (3) arranged sequentially from top to bottom, characterized in that: It also includes a first sliding component (4) and a second sliding component (5). The outer rail (3) has a first sliding groove (304) adapted to the middle rail (2) inside. The middle rail (2) has a second sliding groove (204) adapted to the inner rail (1) inside. The inner rail (1) slides left and right through the first sliding component (4) and the second sliding groove (204). The middle rail (2) slides left and right through the second sliding component (5) and the first sliding groove (304). The two side walls on the right end of the outer rail (3) are respectively provided with inward-facing... An arc-shaped wall (301) is formed by a protrusion, and a first protrusion (3011) protruding inward is provided in the middle of the arc-shaped wall (301). A locking structure (6) is provided at the right end of the inner rail (1). The locking structure (6) includes a rotating wheel (601) arranged sequentially from bottom to top, and a rotating wheel positioning member (602) for mounting the rotating wheel (601). The rotating wheel positioning member (602) is provided with adjusting arms (6021) on the front and rear sides for adjusting the front and rear distance, and the adjusting arms (6021) can... The rotating wheel (601) forms a limiting contact with the first convex bulge (3011). Two arc-shaped grooves (6011) are provided on the side of the rotating wheel (601) near the rotating wheel positioning member (602). Several sequentially distributed stop grooves (60111) are provided on the side of the arc-shaped grooves (6011) near the shaft hole of the rotating wheel (601). Two sets of mutually centrally symmetrical inner gear teeth (6012) are respectively provided inside the two arc-shaped grooves (6011). The several stop grooves (60111) and the several inner gear teeth (6012) are spaced apart. The size of several gear slots (60111) decreases sequentially along the circumferential direction of the shaft hole of the rotating wheel (601). The rotating wheel positioning component (602) is also provided with two symmetrical locking points (6022). The locking points (6022) are adapted to the gear slots (60111) between the inner wheel teeth (6012). Thus, rotating the rotating wheel (601) can realize the gear adjustment, thereby adjusting the distance between the two front and rear adjusting arms (6021), and thus realizing the tightness adjustment between the inner rail (1) and the outer rail (3).

2. The adjustable three-section slide rail with a locking structure according to claim 1, characterized in that: The inner rail (1) has a first positioning hole (101) at the right end, and the rotating wheel positioning component (602) has a through hole (6024) at the corresponding position on the right end. The rotating wheel positioning component (602) is set on the inner rail (1) by a rivet (7).

3. The adjustable three-section slide rail with a locking structure according to claim 1, characterized in that: The rotating wheel positioning component (602) has a movable opening (6025) in the middle. The inner rail (3) has a rivet hole (307) at a position corresponding to the movable opening (6025). The rivet hole (307) is rotatably connected to the shaft hole of the rotating wheel (601) by a rivet (7). The left end of the rotating wheel positioning component (602) is set in a "V" shape (6023). The opening direction of the "V" shape (6023) can be set to face left or right. The "V" shape (6023) is set on the left side of the movable opening (6025).

4. The adjustable three-section slide rail with a locking structure according to claim 1, characterized in that: The two symmetrical locking points (6022) and the two adjusting arms (6021) protrude upward relative to the rotating wheel positioning component (602), and the two locking points (6022) are located on the inner side of the two adjusting arms (6021).

5. The adjustable three-section slide rail with a locking structure according to claim 1, characterized in that: The tooth height of the two sets of inner gear teeth (6012) of the rotating wheel (601) decreases sequentially along the circumferential direction of the shaft hole of the rotating wheel (601), and the rotating wheel (601) is a gear with a number of outer gear teeth (6014) covering its outer circumference.

6. A three-section slide rail with an adjustable locking structure according to any one of claims 1 to 5, characterized in that: A first limiting block (302) is fixedly installed on the middle left side of the outer rail (3) to limit the range of leftward movement of the middle rail (2).

7. The adjustable three-section slide rail with a locking structure according to claim 6, characterized in that: The left end face of the middle rail (2) is fixedly provided with a second limiting block (201) on both the front and rear sides. The second limiting block (201) on the front and rear sides is bent and protruded along the side close to the inner wall of the outer rail (3) to limit the range of the second sliding component (5) to move to the left.

8. The adjustable three-section slide rail with a locking structure according to claim 7, characterized in that: A third limiting block (303) is fixedly installed on the right side of the outer rail (3). The third limiting blocks (303) on the front and rear sides are bent and protruded along the side close to the outer wall of the middle rail (2) to limit the range of movement of the second sliding component (5) to the right.

9. The adjustable three-section slide rail with a locking structure according to claim 8, characterized in that: The left side of the middle rail (2) is provided with an upwardly protruding third bulge (202) to limit the range of leftward movement of the first sliding component (4).

10. A three-section slide rail with an adjustable locking structure according to any one of claims 1 to 5 and 7 to 9, characterized in that: The second sliding component (5) includes several balls (8) and an integrally formed plastic ball nest. The balls (8) are movably disposed on the plastic ball nest. The inner rail (1) is connected to the middle rail (2) through several balls (8). The first sliding component (4) includes several balls (8) and an integrally formed welded ball nest. The balls (8) are movably disposed on the welded ball nest. The middle rail (2) is connected to the outer rail (3) through several balls (8).

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