A three - section slide rail capable of achieving synchronous movement

Abstract

The present invention discloses a three - section slide rail capable of realizing synchronous movement, including an outer rail, a middle rail, and an inner rail. The outer rail is slidably connected to the middle rail left - and - right, and the middle rail is slidably connected to the inner rail left - and - right. A spring arm is provided at the left end of the middle rail, a first limiting portion is provided at the movable end of the spring arm, a second limiting portion is provided at the left end of the inner rail, and the first limiting portion and the second limiting portion can be in limiting cooperation. A third limiting portion is provided at the right end of the middle rail, a fourth limiting portion is provided at the right end of the inner rail, and the third limiting portion and the fourth limiting portion can be in limiting cooperation to restrict the left - and - right movement of the inner rail relative to the middle rail. The structural design of the present invention is reasonable. It can, according to the needs of users, select whether the inner rail and the middle rail perform relative movement or synchronous movement, thus providing more choices for users and facilitating the use of users.

Description

Technical Field

[0001] The present invention relates to the technical field of slide rails, and particularly relates to a three - section slide rail capable of achieving synchronous movement. Background Art

[0002] A three - section slide rail generally includes an outer rail, a middle rail, an inner rail, a ball nest and balls. Stoppers and stop points are provided on the outer rail to prevent the balls from coming out and causing the separation of the middle rail and the outer rail. The middle rail is arranged on the outer rail, the inner rail is arranged on the middle rail, and stoppers and stop points are provided on the middle rail to prevent the balls from coming out and causing the separation of the middle rail and the inner rail. The balls are embedded in the ball nest or ball strip. Ball nests and balls are provided between the inner side surface of the outer rail and the outer side surface of the middle rail, and between the inner side surface of the middle rail and the outer side surface of the inner rail.

[0003] The existing three - section slide rails have the following problems: when pulling the inner rail, not only does the middle rail move relative to the outer rail, but the inner rail also moves relative to the middle rail. Therefore, when only the relative movement between the middle rail and the outer rail is required, but the relative movement between the inner rail and the middle rail is not required, how to make the inner rail and the middle rail move synchronously is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] The purpose of the present invention is to provide a three - section slide rail capable of achieving synchronous movement, so as to enable the inner rail to move synchronously with the middle rail when the middle rail moves relative to the outer rail.

[0005] To achieve the above purpose, the technical solution of the present invention provides a three - section slide rail capable of achieving synchronous movement, including an outer rail, a middle rail, and an inner rail. The outer rail is slidably connected to the middle rail in the left - right direction, and the middle rail is slidably connected to the inner rail in the left - right direction. A spring arm is provided at the left end of the middle rail, a first limiting portion is provided at the movable end of the spring arm, a second limiting portion is provided at the left end of the inner rail, and the first limiting portion and the second limiting portion can be in limiting cooperation. A third limiting portion is provided at the right end of the middle rail, a fourth limiting portion is provided at the right end of the inner rail, and the third limiting portion and the fourth limiting portion can be in limiting cooperation to limit the left - right movement of the inner rail relative to the middle rail.

[0006] Further, a first chute extending in the left - right direction is provided at the top of the outer rail, a second chute extending in the left - right direction is provided at the top of the middle rail, and a third chute extending in the left - right direction is provided at the bottom of the inner rail. The middle rail is arranged in the first chute, and the inner rail is arranged in the second chute.

[0007] Further, the front and rear side walls of the first chute are respectively slidably connected to the front and rear side walls of the middle rail in the left - right direction through ball strips, and the front and rear side walls of the second chute are respectively slidably connected to the front and rear side walls of the inner rail in the left - right direction through ball nests.

[0008] Furthermore, a clamping position sealant is provided at the left end of the first sliding groove. The clamping position sealant is arranged to the left of the middle rail. First clamping blocks are respectively provided on the front and rear side walls at the left end of the middle rail. Second clamping blocks are respectively provided on the front and rear side walls at the right end of the first sliding groove. The right end of the middle rail can pass through the space between the second clamping blocks on the front and rear sides to the right. The bead strip is arranged between the first clamping block and the second clamping block.

[0009] Furthermore, the left end of the first limiting part and the right end of the second limiting part can be in limiting cooperation to limit the rightward movement of the inner rail relative to the middle rail. The fourth limiting part is located to the right of the third limiting part. The right end of the third limiting part and the left end of the fourth limiting part can be in limiting cooperation to limit the leftward movement of the inner rail relative to the middle rail.

[0010] Furthermore, the elastic arm is arranged at the left end of the second sliding groove. The second limiting part is arranged at the left end of the third sliding groove. The third limiting part is arranged at the right end of the second sliding groove. The fourth limiting part is arranged at the right end of the third sliding groove.

[0011] Furthermore, the number of the elastic arms is two. The two elastic arms are sequentially distributed in the front-rear direction. The right ends of the elastic arms on the front and rear sides are respectively connected to the front and rear ends of the fixing part. The fixing part is fixed to the middle of the bottom surface of the second sliding groove. The left end of the elastic arm is set as the movable end. The first limiting part is arranged outside the movable end.

[0012] Furthermore, a guide plate is provided in the middle of the first sliding groove. A guide groove is provided at the top of the guide plate. The guide plate is arranged below the middle rail. A through hole penetrating downward to the first sliding groove is provided at the left end of the second sliding groove. A guide block is provided at the bottom of the movable end of the elastic arm. The guide block passes through the through hole downward to reach the first sliding groove. The guide block and the guide groove can be in guiding cooperation to make the movable ends of the elastic arms approach each other.

[0013] Furthermore, the left end of the guide groove is set as an opening. The space of the guide groove gradually contracts from left to right towards the middle. First arc-shaped surfaces are respectively provided on the front and rear side walls of the guide groove. A second arc-shaped surface is provided on the outer side of the guide block. Both the first arc-shaped surface and the second arc-shaped surface gradually extend from left to right towards the middle.

[0014] Further, grooves are respectively provided on the front and rear sides of the top of the third limiting portion, and the front and rear side walls of the right end of the inner rail are respectively in left-right sliding fit with the grooves on the front and rear sides; a rib is further provided on the top of the third limiting portion, and the rib is arranged between the grooves on the front and rear sides; a fifth limiting portion is provided in the middle of the third sliding groove, and the right end of the fifth limiting portion can be in limiting fit with the left end of the rib to limit the inner rail from disengaging from the right end of the middle rail.

[0015] To sum up, by applying the technical solution of the present invention, the following beneficial effects are achieved: The structure of the present invention is reasonably designed. (1) By the limiting fit between the first limiting portion and the second limiting portion, and the limiting fit between the third limiting portion and the fourth limiting portion, the left-right movement of the inner rail relative to the middle rail is restricted. Thus, when the inner rail is pulled, only the middle rail and the outer rail move relative to each other, while the inner rail and the middle rail will move synchronously. (2) By arranging the first limiting portion at the movable end of the elastic arm, when the movable end of the elastic arm is driven to make the first limiting portion and the second limiting portion form a dislocation, the relative movement between the inner rail and the middle rail can be realized. (3) From the above analysis, it can be seen that the three-section slide rail of the present invention can, according to the needs of users, choose whether the inner rail and the middle rail perform relative movement or synchronous movement, thus providing more choices for users and facilitating the use of users. Description of the Drawings

[0016] Figure 1 is the top view structural schematic diagram of the present invention;

[0017] Figure 2 is the top view structural schematic diagram of the present invention when the inner rail is removed;

[0018] Figure 3 is the top view structural schematic diagram of the outer rail of the present invention;

[0019] Figure 4 is the top view structural schematic diagram of the middle rail of the present invention;

[0020] Figure 5 is the top view structural schematic diagram of the middle rail of the present invention when the elastic arm is removed;

[0021] Figure 6 is the bottom view structural schematic diagram of the elastic arm of the present invention;

[0022] Figure 7 is the top view structural schematic diagram of the inner rail of the present invention;

[0023] Figure 8 is the bottom view structural schematic diagram of the inner rail of the present invention;

[0024] Explanation of the accompanying drawings: 1-outer rail, 101-first slide groove, 102-second locking block; 2-middle rail, 201-second slide groove, 202-first locking block, 203-through hole; 3-inner rail, 301-third slide groove; 4-elastic arm, 401-guide block, 402-second arcuate surface; 5-first limiting part, 6-second limiting part; 7-third limiting part, 701-groove, 702-convex strip; 8-fourth limiting part, 9-bead strip, 10-bead nest, 11-locking glue, 12-fixing part; 13-guide plate, 1301-guide groove, 1302-first arcuate surface; 14-fifth limiting part. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention, but this does not constitute a limitation on the protection scope of the present invention.

[0026] In the present invention, for a clearer description, the following explanation is made: the observer faces the attached Figure 1 For observation, the left side of the observer is set as left, the right side of the observer is set as right, the front of the observer is set as bottom, the rear of the observer is set as top, the top of the observer is set as front, and the bottom of the observer is set as back. It should be pointed out that the terms "front end", "rear end", "left side", "right side", "middle", "top", "bottom" and the like in the text indicate the orientation or position relationship based on the orientation or position relationship set in the drawings, which is only for the convenience of clearly describing the present invention, and does not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", and "fourth" are only used for the purpose of clarity or simplification of description, and cannot be understood as indicating or implying relative importance or quantity.

[0027] See also Figures 1 to 8, this embodiment provides a three - section slide rail capable of achieving synchronous movement, including an outer rail 1, a middle rail 2, and an inner rail 3. The outer rail 1 is slidably connected to the middle rail 2 in the left - right direction, and the middle rail 2 is slidably connected to the inner rail 3 in the left - right direction. A spring arm 4 is provided at the left end of the middle rail 2, a first limiting portion 5 is provided at the movable end of the spring arm 4, a second limiting portion 6 is provided at the left end of the inner rail 3, and the first limiting portion 5 and the second limiting portion 6 can be in limiting cooperation. A third limiting portion 7 is provided at the right end of the middle rail 2, a fourth limiting portion 8 is provided at the right end of the inner rail 3, and the third limiting portion 7 and the fourth limiting portion 8 can be in limiting cooperation to limit the left - right movement of the inner rail 3 relative to the middle rail 2. Functions: (1) By the limiting cooperation between the first limiting portion and the second limiting portion, and the limiting cooperation between the third limiting portion and the fourth limiting portion, the left - right movement of the inner rail relative to the middle rail is restricted. Thus, when pulling the inner rail, only the middle rail and the outer rail move relative to each other, while the inner rail and the middle rail will maintain synchronous movement; (2) By providing the first limiting portion at the movable end of the spring arm, when driving the movable end of the spring arm to make the first limiting portion and the second limiting portion out of alignment, the relative movement between the inner rail and the middle rail can be achieved; (3) From the above analysis, it can be seen that the three - section slide rail of the present invention can, according to the needs of users, choose whether the inner rail and the middle rail perform relative movement or synchronous movement, thus providing more choices for users and facilitating the use of users. Preferably, the first limiting portion, the second limiting portion, the third limiting portion, and the fourth limiting portion are in block or plate shape.

[0028] Specifically, a first chute 101 extending in the left - right direction is provided at the top of the outer rail 1, a second chute 201 extending in the left - right direction is provided at the top of the middle rail 2, and a third chute 301 extending in the left - right direction is provided at the bottom of the inner rail 3. The middle rail 2 is arranged in the first chute 101, and the inner rail 3 is arranged in the second chute 201. Functions: By providing the first chute, the second chute, and the third chute, the sliding cooperation between the outer rail and the middle rail, and between the middle rail and the inner rail is facilitated.

[0029] Specifically, the front and rear side walls of the first chute 101 are respectively slidably connected to the front and rear side walls of the middle rail 2 in the left - right direction through bead strips 9, and the front and rear side walls of the second chute 201 are respectively slidably connected to the front and rear side walls of the inner rail 3 in the left - right direction through bead nests 10. Functions: By providing bead nests and bead strips, the sliding cooperation between the outer rail and the middle rail, and between the inner rail and the middle rail becomes smoother.

[0030] Specifically, a clamping and locking rubber 11 is provided at the left end of the first sliding groove 101. The clamping and locking rubber 11 is located to the left of the middle rail 2. First clamping blocks 202 are respectively provided on the front and rear side walls at the left end of the middle rail 2. Second clamping blocks 102 are respectively provided on the front and rear side walls at the right end of the first sliding groove 101. The right end of the middle rail 2 can pass through the interval between the second clamping blocks 102 on the front and rear sides to the right. The bead strip 9 is arranged between the first clamping block 202 and the second clamping block 102. Function: The clamping and locking rubber is used to prevent the middle rail from moving excessively to the left, thereby preventing the middle rail from detaching from the outer rail after moving excessively to the left. At the same time, the clamping and locking rubber also has a locking function for the inner rail. That is to say, the clamping and locking rubber can enter the inner side of the left end of the inner rail from the left end opening of the inner rail. Since the clamping and locking rubber has an elastic force, when the clamping and locking rubber enters the inner side of the left end of the inner rail, the frictional force generated between the clamping and locking rubber and the inner rail will form a locking effect on the inner rail. Therefore, the clamping and locking rubber can prevent the inner rail from freely sliding to the right when static. If it needs to slide, a force exceeding this locking force is required; and after the middle rail moves to the right to a certain extent, the right end of the bead strip will abut against the second clamping block, and the first clamping block will abut against the left end of the bead strip, thereby preventing the middle rail from continuing to move to the right, thereby preventing the middle rail from detaching from the outer rail after moving excessively to the right.

[0031] Specifically, the left end of the first limiting part 5 and the right end of the second limiting part 6 can be in limiting cooperation to limit the rightward movement of the inner rail 3 relative to the middle rail 2. The fourth limiting part 8 is located to the right of the third limiting part 7. The right end of the third limiting part 7 and the left end of the fourth limiting part 8 can be in limiting cooperation to limit the leftward movement of the inner rail 3 relative to the middle rail 2. Function: By the cooperation of the first limiting part and the second limiting part, the rightward movement of the inner rail relative to the middle rail is prevented, and by the cooperation of the third limiting part and the fourth limiting part, the leftward movement of the inner rail relative to the middle rail is prevented, so that the inner rail and the middle rail maintain synchronous movement with this structure.

[0032] Specifically, the elastic arm 4 is provided at the left end of the second sliding groove 201, and the second limiting part 6 is provided at the left end of the third sliding groove 301. The third limiting part 7 is provided at the right end of the second sliding groove 201, and the fourth limiting part 8 is provided at the right end of the third sliding groove 301. Function: By arranging the elastic arm and the third limiting part in the second sliding groove, and arranging the second limiting part and the fourth limiting part in the third sliding groove, the distance between the first limiting part and the second limiting part and the distance between the third limiting part and the fourth limiting part are made closer, so that the cooperation is more convenient.

[0033] Specifically, the number of the elastic arms 4 is two, and the two elastic arms 4 are sequentially distributed in the front-back direction. The right ends of the elastic arms 4 on the front and back sides are respectively connected to the front and back ends of the fixing part 12, and the fixing part 12 is fixed to the middle of the bottom surface of the second sliding groove 201; the left end of the elastic arm 4 is set as the movable end, and the first limiting part 5 is arranged outside the movable end. Function: By setting two elastic arms, a U-shaped opening to the left is formed between the two elastic arms, so that the two elastic arms form a catapult effect, and thus have sufficient reset elastic force. It should be noted that although the number of the elastic arms is two, the number of the second limiting parts is one. The second limiting part is in limiting cooperation with the first limiting part of one of the two elastic arms, so as to save costs while ensuring that the limiting can be achieved.

[0034] Specifically, a guide plate 13 is arranged in the middle of the first sliding groove 101. A guide groove 1301 is arranged at the top of the guide plate 13, and the guide plate 13 is arranged below the middle rail 2; a through hole 203 is arranged at the left end of the second sliding groove 201 and penetrates downward to the first sliding groove 101. A guide block 401 is arranged at the bottom of the movable end of the elastic arm 4. The guide block 401 passes through the through hole 203 downward to reach the inside of the first sliding groove 101. The guide block 401 can be in guiding cooperation with the guide groove 1301 to make the movable ends of the elastic arms 4 approach each other. Function: By arranging a guide plate in the middle of the first sliding groove, when the guide block of the elastic arm is on the left side of the guide plate, the movable ends of the front and rear elastic arms are in an open state, so that the first limiting part can be in limiting cooperation with the second limiting part. At the same time, due to the cooperation of the third limiting part and the fourth limiting part, the middle rail and the inner rail move synchronously; when the guide block of the elastic arm enters the guide groove to the right, due to the guiding effect of the guide groove, the movable ends of the front and rear elastic arms approach each other to the middle respectively, so that the limiting cooperation between the first limiting part and the second limiting part is destroyed, so that the second limiting part can continue to move to the right, so that the inner rail can move to the right relative to the middle rail. That is to say, when the guide block is on the left side of the guide groove, the inner rail and the middle rail move synchronously, and when the guide block is in the guide groove, the inner rail can move to the right relative to the middle rail.

[0035] Specifically, the left end of the guiding groove 1301 is set to be open, and the space of the guiding groove 1301 gradually contracts from left to right towards the middle. The front and rear side walls of the guiding groove 1301 are respectively provided with a first arc surface 1302; the outer side of the guiding block 401 is provided with a second arc surface 402, and both the first arc surface 1302 and the second arc surface 402 gradually extend from left to right towards the middle. Function: Through this setting of the guiding groove, when the guiding blocks of the front and rear spring arms enter the guiding groove from the right, due to the reduction of the space of the guiding groove, the front and rear spring arms respectively move closer to the middle, thus destroying the limiting cooperation between the first limiting portion and the second limiting portion; when the guiding block moves out of the guiding groove to the left, due to the increase of the space and the elastic force of the spring arm, the front and rear spring arms separate from each other, so that the first limiting portion and the second limiting portion can perform the limiting cooperation again. Preferably, an inclined surface or an arc surface extending from left to right towards the middle can be provided on the side of the first limiting portion away from the spring arm, so as to facilitate the return of the second limiting portion to the left of the first limiting portion.

[0036] Specifically, grooves 701 are respectively provided on the front and rear sides of the top of the third limiting portion 7, and the front and rear side walls of the right end of the inner rail 3 are respectively in left-right sliding cooperation with the front and rear grooves 701. Function: Such a setting can enable the right end of the inner rail to normally pass through the right end of the second sliding groove, and at the same time, the width of the third limiting portion can be the same as the width of the second sliding groove. A rib 702 is further provided on the top of the third limiting portion 7, and the rib 702 is arranged between the front and rear grooves 701; a fifth limiting portion 14 is provided in the middle of the third sliding groove 301, and the right end of the fifth limiting portion 14 can be in limiting cooperation with the left end of the rib 702 to limit the detachment of the inner rail 3 from the right end of the middle rail 2. Function: Through the cooperation of the rib and the fifth limiting portion, the inner rail is prevented from completely detaching from the right port of the second sliding groove, and since the fifth limiting portion is arranged in the middle of the third sliding groove, a certain left-right movement space is provided between the inner rail and the middle rail. Specifically, the fifth limiting portion can be in the shape of a block, a plate, a step, etc., and can be selected according to needs.

[0037] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A three - section slide rail capable of achieving synchronous movement, comprising an outer rail, a middle rail, and an inner rail, characterized in that: The outer rail is slidably connected to the middle rail left and right, and the middle rail is slidably connected to the inner rail left and right; a spring arm is provided at the left end of the middle rail, a first limiting portion is provided at the movable end of the spring arm, a second limiting portion is provided at the left end of the inner rail, the first limiting portion and the second limiting portion are in limiting cooperation, a third limiting portion is provided at the right end of the middle rail, a fourth limiting portion is provided at the right end of the inner rail, and the third limiting portion and the fourth limiting portion are in limiting cooperation to limit the left and right movement of the inner rail relative to the middle rail; A first chute extending in the left-right direction is provided at the top of the outer rail, a second chute extending in the left-right direction is provided at the top of the middle rail, a third chute extending in the left-right direction is provided at the bottom of the inner rail, the middle rail is arranged in the first chute, and the inner rail is arranged in the second chute; The left end of the first limiting portion and the right end of the second limiting portion are in limiting cooperation to limit the rightward movement of the inner rail relative to the middle rail; the fourth limiting portion is located to the right of the third limiting portion, and the right end of the third limiting portion and the left end of the fourth limiting portion are in limiting cooperation to limit the leftward movement of the inner rail relative to the middle rail; The spring arm is arranged at the left end of the second chute, and the second limiting portion is arranged at the left end of the third chute; the third limiting portion is arranged at the right end of the second chute, and the fourth limiting portion is arranged at the right end of the third chute; The number of the spring arms includes two, the two spring arms are sequentially distributed in the front-rear direction, the right ends of the front and rear spring arms are respectively connected to the front and rear ends of the fixing portion, and the fixing portion is fixed to the middle of the bottom surface of the second chute; the left end of the spring arm is set as the movable end, and the first limiting portion is arranged outside the movable end; A guide plate is provided in the middle of the first chute, a guide groove is provided at the top of the guide plate, and the guide plate is arranged below the middle rail; a through hole penetrating downward to the first chute is provided at the left end of the second chute, a guide block is provided at the bottom of the movable end of the spring arm, the guide block passes downward through the through hole to reach the first chute, and the guide block is in guiding cooperation with the guide groove to make the movable ends of the spring arms approach each other; The left end of the guide groove is set as an opening, the space of the guide groove gradually contracts from left to right towards the middle, and first arc surfaces are respectively provided on the front and rear side walls of the guide groove; a second arc surface is provided on the outer side of the guide block, and both the first arc surface and the second arc surface gradually extend from left to right towards the middle.

2. The three - section slide rail capable of achieving synchronous movement according to claim 1, wherein: The front and rear side walls of the first chute are respectively slidably connected to the front and rear side walls of the middle rail left and right through bead strips, and the front and rear side walls of the second chute are respectively slidably connected to the front and rear side walls of the inner rail left and right through bead nests.

3. The three - section slide rail capable of realizing synchronous movement according to claim 2, wherein: A clamping lock rubber is provided at the left end of the first sliding groove. The clamping lock rubber is arranged to the left of the middle rail. First clamping blocks are respectively provided on the front and rear side walls at the left end of the middle rail. Second clamping blocks are respectively provided on the front and rear side walls at the right end of the first sliding groove. The right end of the middle rail can pass through the interval between the second clamping blocks on the front and rear sides to the right. The bead strip is arranged between the first clamping block and the second clamping block.

4. The three - section slide rail capable of achieving synchronous movement according to claim 1, wherein: Grooves are respectively provided on the front and rear sides at the top of the third limiting part. The front and rear side walls at the right end of the inner rail are respectively in left-right sliding fit with the grooves on the front and rear sides. A rib is further provided at the top of the third limiting part. The rib is arranged between the grooves on the front and rear sides. A fifth limiting part is provided in the middle of the third sliding groove. The right end of the fifth limiting part is in limiting fit with the left end of the rib to limit the inner rail from detaching from the right end of the middle rail.

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