Guiding device for a movable furniture part

Abstract

The present invention belongs to the technical field of slide rails and relates to a guiding device for movable furniture components, including an inner rail, a middle rail, and an outer rail. The inner rail is slidably connected to the middle rail through a first cage, and the middle rail is slidably connected to the outer rail through a second cage. It is characterized in that: an unlocking block is fixed on the inner rail, and a self-locking assembly matched with the unlocking block is installed on the outer rail; the self-locking assembly includes a base, a first gear is rotatably arranged on the base, a second gear and a third gear are respectively arranged on both sides of the first gear. The first gear includes an outer ring tooth, a cylindrical part, and an inner ring tooth fixedly connected in sequence along the axial direction. The outer ring tooth is meshed with the second gear and the third gear at the same time, and the rack of the unlocking block is meshed with the outer ring tooth. This guiding device adopts a gear-rack structure to achieve the purpose of self-locking analysis, ensuring more reliable locking and not easy to unlock.

Description

Technical Field

[0001] The present invention belongs to the technical field of slide rails and relates to a guiding device for movable furniture components. Background Art

[0002] Slide rails are widely used in production and daily life. The structure of a slide rail generally includes an outer rail, a middle rail, and an inner rail that are slidably connected to each other. In order to maintain the state of the slide rail when it is closed, a self-locking structure is usually provided on the slide rail to maintain the self-locking state of the slide rail. Currently, the common self-locking structure of a slide rail includes an unlocking block and a self-locking component that cooperates with the unlocking block. The existing unlocking block structure is a block structure with an unlocking groove, and the self-locking component includes a self-locking rod that can elastically slide along a base. The self-locking rod cooperates with the unlocking groove. This structure has been widely used in practice, but after long-term use, it is found that this structure also has some problems. Mainly, after long-term use, there are problems such as unreliable locking and easy unlocking. Summary of the Invention

[0003] In view of the above problems, the present invention provides a guiding device for movable furniture components. The guiding device adopts a gear-rack structure to achieve the purpose of unlocking and self-locking, ensuring more reliable locking and not easy to unlock.

[0004] According to the technical solution of the present invention: a guiding device for movable furniture components includes an inner rail, a middle rail, and an outer rail. The inner rail and the middle rail are slidably connected through a first cage, and the middle rail and the outer rail are slidably connected through a second cage. It is characterized in that: an unlocking block is fixed on the inner rail, and a self-locking component that cooperates with the unlocking block is installed on the outer rail;

[0005] The self-locking component includes a base. A first gear is rotatably arranged on the base. A second gear and a third gear are respectively arranged on both sides of the first gear. The first gear includes an outer ring tooth, a cylindrical part, and an inner ring tooth that are fixedly connected in sequence along the axial direction. The outer ring tooth meshes with the second gear and the third gear at the same time, and the rack of the unlocking block meshes with the outer ring tooth;

[0006] A first slider is slidably connected to the base near the bottom surface of the outer rail. A spring is connected between the first slider and the base. An arc groove is arranged at a position of the first slider close to the bottom of the base. A protrusion is arranged at one end of the arc groove. The outer end of the inner end panel of the base that forms the arc groove is a tangent end face. A sliding groove, an avoidance groove, and a tangent plane groove that communicate with each other are arranged on the first slider. A second slider is arranged in the sliding groove in a matching manner. The cylindrical protrusion D of the second slider is arranged in the guiding sliding groove of the base, and the end of the guiding sliding groove is transitionally connected with a deflecting arc;

[0007] The bottom surface of the second gear is eccentrically provided with a cylindrical protrusion B, and the bottom surface of the third gear is eccentrically provided with a cylindrical protrusion C. The cylindrical protrusion C is matched with the tangent end face to push the first slider to slide along the base; the cylindrical protrusion B is matched with the tangent plane groove to push the first slider to slide along the base.

[0008] As a further improvement of the present invention, first spring slots are respectively arranged on both sides of the bottom of the base, second spring slots are correspondingly arranged on the first slider, and a spring is connected between the corresponding first spring slot and the second spring slot.

[0009] As a further improvement of the present invention, a first round hole, a second round hole, and a third round hole are arranged on the base. The first gear is rotatably connected to the first round hole, the second gear is rotatably connected to the second round hole, and the third gear is rotatably connected to the third round hole; a first elastic wall is arranged on the base corresponding to the outside of the second round hole, the second gear is provided with a first shaft, and the first shaft is in limit fit connection with the second round hole through a first hanging platform arranged on its surface; a second elastic wall is arranged on the base corresponding to the outside of the third round hole, the third gear is provided with a second shaft, and the second shaft is in limit fit connection with the third round hole through a second hanging platform arranged on its surface.

[0010] As a further improvement of the present invention, installation arrows are respectively arranged at both ends of the base along the length direction, the directions of the two installation arrows are opposite, a first retaining edge is arranged on the bottom surface of the second gear, the second gear is provided with a first arc tooth, a second retaining edge is arranged on the bottom surface of the third gear, and the third gear is provided with a second arc tooth; during initial installation, the first arc tooth and the second arc tooth respectively point to the adjacent installation arrows; the first retaining edge and the second retaining edge support on the bottom surface of the outer ring teeth of the first gear.

[0011] As a further improvement of the present invention, guiding protrusions are respectively arranged on both sides of the base, and the guiding groove of the first slider is in sliding fit connection with the guiding protrusion.

[0012] As a further improvement of the present invention, a buffer rubber is arranged at the upper end of the base.

[0013] As a further improvement of the present invention, an arc convex part is arranged at one end of the base close to the buffer rubber, and a groove part is arranged on the first slider, and the groove part is matched with the arc convex part.

[0014] As a further improvement of the present invention, a third retaining edge is further arranged on the base, and the third retaining edge forms a limit for the third gear.

[0015] The technical effect of the present invention is that the product structure of the present invention is reasonable and ingenious. Aiming at the problem that the existing slide rail structure has unreliable locking and is easy to unlock after long-term use, targeted improvements are made. The use of a gear-rack structure can ensure reliable locking. Description of the Drawings

[0016] Figure 1 This is the explosion diagram of the present invention.

[0017] Figure 2 This is the explosion diagram of the self-locking component.

[0018] Figure 3 This is the perspective view of the self-locking component.

[0019] Figure 4 This is the cross-sectional view of the self-locking component.

[0020] Figure 5 This is the mating diagram of the rack and the self-locking component.

[0021] Figure 6 、 7 This is the perspective view of the base.

[0022] Figure 8 、 9 This is the perspective view of the first slider.

[0023] Figure 10 、 11 This is the perspective view of the unlocking block.

[0024] Figure 12 、 13 This is the perspective view of the first gear.

[0025] Figure 14 This is the perspective view of the second gear.

[0026] Figure 15 This is the perspective view of the third gear.

[0027] Figure 16 This is the perspective view of the third gear.

[0028] Figure 17 This is the structural diagram of the second slider.

[0029] Figure 18 、 19 This is the schematic diagram of the initial position of the self-locking component.

[0030] Figure 20 、 21 This is the schematic diagram of the pulling process of the self-locking component.

[0031] Figure 22 、 23 This is the schematic diagram of the pulled and locked position of the self-locking component.

[0032] Figure 24 、 25 This is the schematic diagram of the failure reset of the self-locking component.

[0033] Figure 26 、27 It is a schematic diagram of the failure reset of the self-locking component. Specific embodiments

[0034] The following further describes the specific embodiments of the present invention with reference to the accompanying drawings.

[0035] Figures 1 to 27 Among them, it includes an inner rail 100, an unlocking block 200, a rack 210, a self-locking component 300, a base 310, an installation arrow 310-1, a first round hole 311, a second round hole 312, a third round hole 313, a guiding protrusion 314, a guiding chute 315, a deflecting arc 316, a third retaining edge 317, a third elastic wall 318, a first spring slot 319, a first slider 320, a guiding slot 321, a protrusion 322, an arc slot 323, a tangential plane slot 324, a tangential end face 325, a second spring slot 326, an avoidance slot 327, a sliding slot 328, a second slider 330, a cylindrical protrusion D 331, a first gear 340, an inner ring tooth 341, an outer ring tooth 342, a cylindrical part 343, a second gear 350, a cylindrical protrusion B 351, a first retaining edge 352, a first shaft 353, a first single tooth 354, a first hanging platform 355, a third gear 360, a cylindrical protrusion C 361, a second retaining edge 362, a second shaft 363, a second single tooth 364, a second hanging platform 365, a buffer rubber 370, an outer rail 400, a first cage 500, a middle rail 600, a second cage 700, etc.

[0036] As Figure 1 shown, the present invention is a guiding device for movable furniture components, including an inner rail 100, a middle rail 600, and an outer rail 400. The inner rail 100 is slidably connected to the middle rail 600 through a first cage 500, and the middle rail 600 is slidably connected to the outer rail 400 through a second cage 700. It is characterized in that: an unlocking block 200 is fixed on the inner rail 100, and a self-locking component 300 cooperating with the unlocking block 200 is installed on the outer rail 400.

[0037] As Figures 2 to 5 shown, the self-locking component 300 includes a base 310. A first gear 340 is rotatably arranged on the base 310. A second gear 350 and a third gear 360 are respectively arranged on both sides of the first gear 340. The first gear 340 includes an outer ring tooth 342, a cylindrical part 343, and an inner ring tooth 341 fixedly connected in sequence along the axial direction. The outer ring tooth 342 meshes with the second gear 350 and the third gear 360 at the same time, and the rack 210 of the unlocking block 200 meshes with the outer ring tooth 342.

[0038] As Figure 6 、 7As shown in the figure, a first slider 320 is slidably connected to one side of the bottom surface of the base 310 close to the outer rail 400. A spring 380 is connected between the first slider 320 and the base 310. An arc groove 323 is provided at a position of the first slider 320 close to the bottom of the base 310. A protrusion 322 is provided at one end of the arc groove 323. The outer end of the inner end panel of the base 310 that forms the arc groove 323 is a tangent end face 325. A sliding groove 328, an avoidance groove 327, and a tangent plane groove 324 that communicate with each other are provided on the first slider 320. A second slider 330 is fitted in the sliding groove 328. A cylindrical protrusion D331 of the second slider 330 is fitted in a guiding sliding groove 315 of the base 310. The end of the guiding sliding groove 315 is transitionally connected to a deflecting arc 316.

[0039] As Figure 13 , 14 As shown in the figure, a cylindrical protrusion B351 is eccentrically provided on the bottom surface of the second gear 350, and a cylindrical protrusion C361 is eccentrically provided on the bottom surface of the third gear 360. The cylindrical protrusion C361 is matched with the tangent end face 325 to push the first slider 320 to slide along the base 310; the cylindrical protrusion B351 is matched with the tangent plane groove 324 to push the first slider 320 to slide along the base 310.

[0040] First spring clamping grooves 319 are respectively provided on both sides of the bottom of the base 310. Second spring clamping grooves 326 are correspondingly provided on the first slider 320. The spring 380 is connected between the corresponding first spring clamping groove 319 and the second spring clamping groove 326.

[0041] The base 310 is provided with a first round hole 311, a second round hole 312, and a third round hole 313. The first gear 340 is rotatably connected to the first round hole 311, the second gear 350 is rotatably connected to the second round hole 312, and the third gear 360 is rotatably connected to the third round hole 313. A first elastic wall 312-1 is provided on the outside of the base 310 corresponding to the second round hole 312. The second gear 350 is provided with a first shaft 353, and the first shaft 353 is in limit-fitting connection with the second round hole 312 through a first hanging platform 355 provided on its surface. A second elastic wall 313-1 is provided on the outside of the base 310 corresponding to the third round hole 313. The third gear 360 is provided with a second shaft 363, and the second shaft 363 is in limit-fitting connection with the third round hole 313 through a second hanging platform 365 provided on its surface. The base 310 in the product of the present invention is a plastic part, and the first elastic wall 312-1 and the second elastic wall 313-1 are respectively arc holes penetrating through the base 310. When installing the second gear 350 and the third gear 360, the first hanging platform 355 and the second hanging platform 365 cross the corresponding elastic walls, so that the second gear 350 and the third gear 360 are installed in the corresponding second round hole 312 and third round hole 313. The distance between the first hanging platforms 355 at the two radial ends of the first shaft 353 is greater than the diameter of the second round hole 312, and the distance between the second hanging platforms 365 at the two radial ends of the second shaft 363 is greater than the diameter of the third round hole 313, ensuring that the second gear 350 and the third gear 360 will not slip off from the corresponding holes after installation.

[0042] Installation arrows 310-1 are respectively provided at both ends of the base 310 along the length direction, and the directions of the two installation arrows 310-1 are opposite. A first stop edge 352 is provided on the bottom surface of the second gear 350, and the second gear 350 is provided with a first arc tooth 354. A second stop edge 362 is provided on the bottom surface of the third gear 360, and the third gear 360 is provided with a second arc tooth 364. During initial installation, the first arc tooth 354 and the second arc tooth 364 respectively point to the adjacent installation arrows 310-1. The first stop edge 352 and the second stop edge 362 are supported on the bottom surface of the outer ring teeth 342 of the first gear 340. A third stop edge 317 and a third elastic wall 318 are further provided on the base 310 to limit and fix the third gear 360. Among them, the third stop edge 317 is supported on the base 310, and the thickness of the gap formed between the third stop edge 317 and the bottom plate of the base 310 is greater than the thickness of the second gear 350. The thickness of the gap between the third elastic wall 318 and the bottom plate of the base 310 is greater than the thickness of the second gear 350.

[0043] The third stop edge 317 limits the third gear 360. The first stop edge 352 of the second gear 350 and the second stop edge 362 of the third gear 360 limit the first gear 340.

[0044] On both sides of the base 310, guiding protrusions 314 are respectively arranged. The guiding groove 321 of the first slider 320 is slidably and cooperatively connected with the guiding protrusions 314. A buffer rubber 370 is arranged at the upper end of the base 310. An arc-shaped protrusion part is arranged at one end of the base 310 close to the buffer rubber 370. A groove part is arranged on the first slider 320, and the groove part cooperates with the arc-shaped protrusion part.

[0045] As Figures 1 to 27 shown, the working principle of the product of the present invention is as follows: The present invention is a guiding device for drawers used in furniture or household appliances, having a base 310. Guiding protrusions 314 are arranged on both sides of the base 310. The guiding groove 321 of the first slider 320 can reciprocate along the guiding protrusions 314. Three round holes are arranged on the base 310, and the first gear 340, the second gear 350, and the third gear 360 are respectively sleeved. A guiding chute 315 is arranged on one side of the base 310. A deflecting arc 316 is arranged at the end of the guiding chute 315. The second slider 330 can reciprocate along the guiding chute 315 and is positionally offset through the deflecting arc 316. During the movement process, the first slider 320 can press on the first gear 340, the second gear 350, the third gear 360, and the second slider 330 to fix them on the base 310. Spring clamping grooves 319 and 326 are respectively arranged at one end of the base 310 and one end of the first slider 320, and a spring 380 is installed. The inner rail 100 fastens the unlocking block 200, and a rack 210 is arranged on the unlocking block 200.

[0046] Furthermore, the cylindrical protrusion D331 of the second slider 330 is placed into the guiding chute 315 of the base 310. A sliding groove 328 is arranged on the first slider 320, and the sliding groove 328 is in guiding cooperation with the second slider 330. Along with the reciprocating movement of the first slider 320, the second slider 330 can reciprocate along the guiding chute 315 of the base 310 and the first slider 320, and can close the avoidance groove 327 on the first slider 320.

[0047] When the slide rail is pulled out, the rack 310 and the first gear 340 engage in motion. The first gear 340 rotates, driving the second gear 350 and the third gear 360 to rotate accordingly. A cylindrical protrusion C361 is provided on the third gear 360. The cylindrical protrusion C361 drives the first slider 320 to move in the pulling-out direction. When the cylindrical protrusion C361 of the third gear 360 rotates to a certain angle and leaves the first slider 320, the cylindrical protrusion B351 on the second gear 350 just enters the first slider 320 and is tangent to the tangent plane groove 324 of the first slider 320. At this time, the first slider 320 is driven by the cylindrical protrusion B351 of the second gear 350 to continue moving in the pulling-out direction. When approaching the pulling-out locking position, the second slider 330 has shifted its position along the deflection arc 316, blocking the original avoidance groove 327 on the first slider 320. When the rack 210 of the unlocking block 200 disengages from the first gear 340, the cylindrical protrusion B351 of the second gear 350 has passed the horizontal line and is locked on the second slider 330 by the action of the spring 380. When the slide rail is closed, the above process moves in reverse, achieving the purpose of automatic mechanical self-locking.

[0048] The working process of the present invention is as follows: As shown in the figure, when the slide rail is pulled out, the rack 210 and the first gear 340 engage in motion. The first gear 340 rotates, driving the second gear 350 and the third gear 360 to rotate accordingly. A cylindrical protrusion C361 is provided on the third gear 360. The cylindrical protrusion C361 is in tangential motion with the tangential end face 325 of the first slider 320, driving the first slider 320 to move in the pulling-out direction, as Figures 23 to 26 shown. When the cylindrical protrusion C361 of the third gear 360 rotates to a certain angle and leaves the first slider 320, the cylindrical protrusion B351 on the second gear 350 also rotates, has passed through the avoidance groove 327 of the first slider 320, and just enters and is tangent to the tangent plane groove 324 of the first slider 320. At this time, the inner rail 100 continues to be pulled outwards, and the rack 210 of the unlocking block 200 continues to drive the first gear 340 to rotate. The cylindrical protrusion B351 of the second gear 350 is in fitting motion with the tangent plane groove 324 of the first slider 320, driving the first slider 320 to continue moving in the pulling-out direction. When approaching the pulling-out locking position, the second slider 330 has shifted its position along the deflection arc 316, blocking the original avoidance groove 327 on the first slider 320. When the rack 210 of the unlocking block 200 on the inner rail 100 disengages from the first gear 340, the cylindrical protrusion B351 of the second gear 350 has passed the horizontal line and will be locked on the second slider 330 by the action of the spring 380, thus achieving the purpose of pulling-out locking.

[0049] As Figures 24 to 27As shown, in the failure reset mode, the inner rail 100 moves in the closing direction. The rack 210 on the unlocking block 200 drives the first gear 340 to rotate. The first gear 340 drives the third gear 360 to rotate. The cylindrical protrusion C361 on the third gear 360 is in tangential motion with the tangential end face 325 of the first slider 320. When rotating a small displacement, the cylindrical protrusion C361 on the third gear 360 enters the arc groove 323 of the first slider 320. At this time, the third gear 360 can easily rotate one circle until the cylindrical protrusion C361 on the third gear 360 passes over the protrusion 322 of the first slider 320, thus resetting to the initial pulled-out position. The protrusion 322 of the first slider 320 is an elastic wall that can deflect in the thickness direction of the slide rail, and an avoidance hole is provided at the corresponding position of the outer rail 400.

Claims

1. A guiding device for a movable furniture component, comprising an inner rail (100), a middle rail (600), and an outer rail (400). The inner rail (100) is slidably connected to the middle rail (600) through a first cage (500), and the middle rail (600) is slidably connected to the outer rail (400) through a second cage (700), characterized in that: The unlocking block (200) is fixed on the inner rail (100), and a self-locking component (300) matched with the unlocking block (200) is installed on the outer rail (400). The self-locking component (300) includes a base (310). A first gear (340) is rotatably arranged on the base (310). A second gear (350) and a third gear (360) are respectively arranged on two sides of the first gear (340). The first gear (340) includes an outer ring tooth (342), a cylindrical part (343), and an inner ring tooth (341) fixedly connected in sequence along the axial direction. The outer ring tooth (342) is meshed with the second gear (350) and the third gear (360) at the same time, and the rack (210) of the unlocking block (200) is meshed with the outer ring tooth (342). A first slider (320) is slidably connected to one side of the base (310) close to the bottom surface of the outer rail (400). A spring (380) is connected between the first slider (320) and the base (310). An arc groove (323) is arranged at a position of the first slider (320) close to the bottom of the base (310). A protrusion (322) is arranged at one end of the arc groove (323). The outer end of the inner end face plate of the base (310) forming the arc groove (323) is a tangent end face (325). A sliding groove (328), an avoidance groove (327), and a tangent plane groove (324) which communicate with each other are arranged on the first slider (320). A second slider (330) is arranged in the sliding groove (328) in a matching manner. The cylindrical protrusion D (331) of the second slider (330) is arranged in the guiding sliding groove (315) of the base (310). The end of the guiding sliding groove (315) is connected with a steering arc (316) through a transition. A cylindrical protrusion B (351) is eccentrically arranged on the bottom surface of the second gear (350), and a cylindrical protrusion C (361) is eccentrically arranged on the bottom surface of the third gear (360). The cylindrical protrusion C (361) is matched with the tangent end face (325) to push the first slider (320) to slide along the base (310). The cylindrical protrusion B (351) is matched with the tangent plane groove (324) to push the first slider (320) to slide along the base (310).

2. The guiding device for a movable furniture part according to claim 1, characterized in that: First spring clamping grooves (319) are respectively arranged on two sides of the bottom of the base (310), and second spring clamping grooves (326) are correspondingly arranged on the first slider (320). The spring (380) is connected between the corresponding first spring clamping groove (319) and the second spring clamping groove (326).

3. The guiding device for a movable furniture part according to claim 1, characterized in that: The base (310) is provided with a first round hole (311), a second round hole (312), and a third round hole (313). The first gear (340) is rotatably connected to the first round hole (311), the second gear (350) is rotatably connected to the second round hole (312), and the third gear (360) is rotatably connected to the third round hole (313). A first elastic wall (312-1) is provided on the outside of the base (310) corresponding to the second round hole (312). The second gear (350) is provided with a first shaft (353). The first shaft (353) is in limiting fit connection with the second round hole (312) through a first hanging platform (355) provided on its surface. A second elastic wall (313-1) is provided on the outside of the base (310) corresponding to the third round hole (313). The third gear (360) is provided with a second shaft (363). The second shaft (363) is in limiting fit connection with the third round hole (313) through a second hanging platform (365) provided on its surface.

4. The guiding device for a movable furniture part according to claim 1, characterized in that: Installation arrows (310-1) are respectively provided at both ends of the base (310) along the length direction. The directions of the two installation arrows (310-1) are opposite. A first retaining edge (352) is provided on the bottom surface of the second gear (350). The second gear (350) is provided with a first solitary tooth (354). A second retaining edge (362) is provided on the bottom surface of the third gear (360). The third gear (360) is provided with a second solitary tooth (364). During initial installation, the first solitary tooth (354) and the second solitary tooth (364) respectively point to the adjacent installation arrows (310-1). The first retaining edge (352) and the second retaining edge (362) are supported on the bottom surface of the outer teeth (342) of the first gear (340).

5. The guiding device for a movable furniture part according to claim 1, characterized in that: Guide protrusions (314) are respectively provided on both sides of the base (310). The guide grooves (321) of the first slider (320) are in sliding fit connection with the guide protrusions (314).

6. The guiding device for a movable furniture part according to claim 1, characterized in that: A buffer rubber (370) is provided at the upper end of the base (310).

7. The guiding device for a movable furniture part according to claim 6, characterized in that: An arc convex part is provided at one end of the base (310) close to the buffer rubber (370). A groove part is provided on the first slider (320). The groove part is matched with the arc convex part.

8. The guiding device for a movable furniture part according to claim 1, characterized in that: A third retaining edge (317) is further provided on the base (310). The third retaining edge (317) forms a limit for the third gear (360).

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