A double-spring linkage guide rail reset buffer

Abstract

A double-spring linkage guide rail reset damper includes a base, on which a reset guide rail and a buffer guide rail are disposed. A reset slider and a buffer slider are slidably mounted on the reset guide rail and the buffer guide rail. The buffer slider is connected to a damper and a first reset tension spring fixed on the base. The reset slider and the buffer slider are hinged together. The base is also provided with an auxiliary limiting device, within which the auxiliary slider slides and restricts its movement trajectory. The beneficial effects of this invention are: by using a double-spring linkage structure to pull the reset slider and the buffer slider, when the user opens the guide rail, the first part is double-spring operation and the second part is single-spring operation, reducing the pulling force required for the user to open the drawer. This makes the damper feel lighter when it disengages from the guide rail, avoiding the strong "weightlessness" caused by excessive inertia that causes the drawer to rush outward, and improving the opening and closing quality of the drawer guide rail.

Description

Technical Field

[0001] This invention relates to a reset buffer for use in drawer guides, specifically a double-spring linkage guide rail reset buffer. Background Technology

[0002] To achieve a reset and automatic buffering function for drawer slides when closed, Chinese patents 201010244745.4, 201610185174.9, 201621075544.5, 201921604046.9, and 202120849473.4 all provide similar technical solutions, the specific structures of which are as follows: Figure 1-3 As shown, it includes a base (1), on which a reset guide rail (2) and a buffer guide rail (3) are provided. The reset guide rail (2) and the buffer guide rail (3) are arranged vertically and are connected by a circular arc rail (4). A reset slider (5) and a buffer slider (6) are slidably installed on the reset guide rail (2) and the buffer guide rail (3). The buffer slider (6) is connected to a damper (7) and a first reset spring (8) fixed on the base (1). The first reset spring (8) always pulls the reset slider (5) and the buffer slider (6) in the closing direction. The reset slider (5) and the buffer slider (6) are hinged together.

[0003] like Figure 1 As shown, when the drawer is closed, the first reset spring pulls the reset slider (5) and the buffer slider (6) to the rear end of the buffer, and the pin on the guide rail hooks onto the reset slider. Figure 2 As shown, when the user opens the drawer outward, the pin on the guide rail (not shown in the figure) is used to pull the reset slider (5) and the buffer slider (6) forward. The reset slider (5) and the buffer slider (6) move forward along the reset guide rail (2). When the reset slider (5) runs into the buffer guide rail (3), the reset slider (5) swings and disengages from the pin on the guide rail, allowing the guide rail to continue to open outward. At the same time, the buffer slider (6) hooks into the buffer guide rail (3), which serves to stretch the first reset spring.

[0004] like Figure 3 As described above, when the user closes the drawer, the guide rail drives the hanging pin to move backward. When the hanging pin reaches the position of the buffer guide rail (3), it collides with the buffer slider (6), forcing the buffer slider (6) to deflect and re-engage with the hanging pin. The first reset spring pulls the reset slider (5) and the buffer slider (6) to move backward. Under the action of the buffer, the guide rail automatically buffers and resets to close.

[0005] However, in existing buffers, the return spring used is a single spring structure. During the buffer's opening process, the tension of the return spring is as follows: Figure 12As shown in Table A, the initial tension of the return spring is F1. When the guide rail opens a certain distance and the buffer slider moves to the release position L1, the tension when it disengages from the pin is F2. The change in tension of the return spring is F1-F2. At the moment of release, the return spring loses its drag on the guide rail, and the user will clearly feel a relatively heavy release when pulling the drawer outward. Under the inertia of the user's pulling force, the drawer will continue to have an inertial impact force, causing discomfort to the user. Therefore, the solution on the market is to change the initial tension of F1, so that the tension value of F2 is reduced. However, with the reduction of spring tension, there will not be enough tension to pull the drawer back when the buffer returns to its original position, making the buffer unusable for heavy-duty drawers. Therefore, further improvement is necessary. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a double-spring linkage guide rail reset buffer that is simple in structure, easy to use, and makes the user feel lighter and more comfortable when opening the drawer while meeting the closing force requirements of the drawer guide rail.

[0007] The objective of this invention is achieved through the following method: a double-spring linkage guide rail reset buffer, comprising a base, on which a reset guide rail and a buffer guide rail are disposed, the reset guide rail and the buffer guide rail being perpendicularly arranged and connected by an arc rail transition; a reset slider and a buffer slider are slidably mounted on the reset guide rail and the buffer guide rail; the buffer slider is connected to a damper fixed on the base and a first reset tension spring; the first reset tension spring always pulls the reset slider and the buffer slider in the closing direction; the reset slider and the buffer slider are hinged together; characterized in that: an auxiliary limiting device is also provided on the base, the auxiliary slider slides within the auxiliary limiting device, and the movement trajectory of the auxiliary slider is limited;

[0008] The auxiliary slider is also equipped with a latching mechanism. When the auxiliary slider slides within the auxiliary limiting device, the latching mechanism engages or disengages with the reset slider or buffer slider according to the designed trajectory to achieve linkage.

[0009] A second reset spring is also provided between the auxiliary slider and the base to always pull the auxiliary slider in the closing direction.

[0010] The auxiliary limiting device consists of a guide boss on the base and a first hook on the side wall of the auxiliary slider. The guide boss protrudes from the upper surface of the base, and the first hook slides on the side wall of the guide boss. When the first hook of the auxiliary slider moves to the front end of the guide boss, it swings and hooks onto the front end of the guide boss.

[0011] The latching mechanism consists of a second hook on the side wall of the auxiliary slider and a reset boss on the reset slider or buffer slider. When the second hook of the auxiliary slider moves to the front end of the reset boss, it swings and the second hook hooks onto the front end face of the reset boss.

[0012] The auxiliary limiting device is a guide groove set on the base. The guide groove includes a reset groove set parallel to the base and a buffer groove set perpendicular to the reset groove. The reset groove and the buffer groove are connected by an arc groove. The bottom of the auxiliary slider is provided with a guide post that slides in the guide groove and restricts the movement trajectory of the auxiliary slider.

[0013] The latching mechanism is an open slot provided on the side wall of the auxiliary slider. Correspondingly, the reset slider is provided with a first locking pin that cooperates with it. The auxiliary slider is latched or separated from the first locking pin through the open slot, so as to realize the linkage between the auxiliary slider and the reset slider.

[0014] The latching mechanism is an opening slot provided on the side wall of the auxiliary slider. Correspondingly, a second locking pin is provided on the buffer slider to cooperate with it. The buffer slider is latched or separated from the second locking pin through the opening slot, so as to realize the linkage between the auxiliary slider and the buffer slider.

[0015] The base surface is fitted with a mask that covers the auxiliary slider and the second reset spring.

[0016] The mask has elastic buckles on its sidewalls, and the mask is secured to the base by these elastic buckles within the mounting bracket.

[0017] The initial tension of the first reset spring is greater than the initial tension of the second reset spring.

[0018] The beneficial effects of this invention are: 1. Simple structure, low production cost, and improved market competitiveness. 2. The use of a double-spring linkage structure to pull the reset slider and buffer slider allows the user to operate with double springs in the first part and single springs in the second part when opening the drawer, reducing the pulling force required for opening the drawer. This makes the buffer feel lighter when it disengages from the drawer, avoiding the strong "weightlessness" caused by excessive inertia that causes the drawer to lurch outwards, and improving the opening and closing feel of the drawer guide rails. Attached Figure Description

[0019] Figure 1-3 This is a schematic diagram of the prior art structure in this invention.

[0020] Figure 4-6 This is a schematic diagram of the buffer opening process in the first embodiment of the present invention.

[0021] Figure 7 This is a structural assembly diagram of the first embodiment of the present invention.

[0022] Figure 8 This is a structural assembly diagram of the second embodiment of the present invention.

[0023] Figure 9-10 This is a schematic diagram of the buffer opening process in the third embodiment of the present invention.

[0024] Figure 11 This is a schematic diagram of the fourth embodiment of the present invention.

[0025] Figure 12 This is a schematic diagram showing the change in spring stroke and tension in this invention. Implementation

[0026] The invention will be further described below with reference to the accompanying drawings. A double-spring linkage guide rail reset buffer includes a base 1, on which a reset guide rail 2 and a buffer guide rail 3 are disposed. The reset guide rail 2 and the buffer guide rail 3 are perpendicularly arranged and connected by an arc rail 4. A reset slider 5 and a buffer slider 6 are slidably mounted on the reset guide rail 2 and the buffer guide rail 3. The buffer slider 6 is connected to a damper 7 and a first reset tension spring 8 fixed on the base 1. The first reset tension spring 8 always pulls the reset slider 5 and the buffer slider 6 in the closing direction. The reset slider 5 and the buffer slider 6 are hinged together. The invention is characterized in that: an auxiliary limiting device is also provided on the base 1, and an auxiliary slider 9 slides within the auxiliary limiting device, limiting the movement trajectory of the auxiliary slider 9.

[0027] The auxiliary slider 9 is also provided with a latching mechanism. When the auxiliary slider 9 slides within the auxiliary limiting device, the latching mechanism engages or disengages with the reset slider 5 or the buffer slider 6 according to the designed trajectory to achieve linkage.

[0028] A second reset spring 10 is also provided between the auxiliary slider 9 and the base 1 to always pull the auxiliary slider 9 in the closing direction.

[0029] First embodiment:

[0030] like Figure 4-7 As shown, the auxiliary limiting device consists of a guide boss 11 on the base 1 and a first hook 91 on the side wall of the auxiliary slider 9. The guide boss 11 protrudes from the upper end face of the base 1, and the first hook 91 slides on the side wall of the guide boss 11. When the first hook 91 of the auxiliary slider 9 moves to the front end of the guide boss 11, it swings and the first hook 91 hooks onto the front end face of the guide boss 11.

[0031] The latching mechanism consists of a second hook 92 on the side wall of the auxiliary slider 9 and a reset boss 52 on the reset slider 5 or the buffer slider 6. When the second hook 92 of the auxiliary slider 9 moves to the front end of the reset boss 52, it swings and the second hook 92 hooks onto the front end face of the reset boss 52.

[0032] Working principle of the first embodiment: as follows Figure 4 As shown, after the guide rail is closed, the second hook 92 is engaged with the front end face of the reset boss 52, and the side wall of the first hook is located on the side wall of the guide boss 11. When the user pulls the guide rail outward to open the drawer, the hook pin on the guide rail (not shown in the figure) is engaged with the buffer slider, thereby dragging the buffer slider and the reset slider outward along the side wall of the guide boss 11. When the first hook 91 of the auxiliary slider 9 reaches the front end of the guide boss 11, the side wall of the guide boss loses its blocking effect on the first hook, and the auxiliary slider swings under the action of the tension spring, and the first hook 91 engages with the front end face of the guide boss 11. After the auxiliary slider swings, the second hook 92 on the auxiliary slider separates from the front end face of the reset boss 52, and the second reset tension spring 10 loses its drag on the reset slider and the buffer slider. As the guide rail continues to open, the pin continues to pull the reset slider and buffer slider forward until the buffer slider 6 reaches the buffer guide rail 3. At this point, the buffer slider 6 sways and disengages from the pin on the guide rail, allowing the guide rail to continue moving forward until it is fully open. When the guide rail closes, the pin on the guide rail collides with the buffer slider 6, forcing the buffer slider 6 to sway and re-engage with the pin. After swaying, the buffer slider 6 separates from the buffer guide rail, and under the tension of the first reset spring, it pulls the guide rail inward to close. When the buffer slider 6 retracts to the rear end of the buffer groove 13, the side wall of the auxiliary slider loses the obstruction of the reset boss 52. Under the action of the second reset spring, the auxiliary slider sways, and the second hook 92 engages with the front end of the reset boss 52. The second reset spring and the first reset spring are simultaneously subjected to force, pulling the reset slider and buffer slider to reset. Under the action of the damper, the guide rail and drawer are pulled to achieve the reset and buffering function. In this embodiment, the trajectory of the auxiliary slider is limited by the guide boss 11 and the reset boss 52. When the buffer is working, the auxiliary slider slides on the side walls of the guide boss 11 and the reset boss 52 using the first hook and the second hook on both sides of it.

[0033] Second embodiment: as follows Figure 8 As shown, the auxiliary limiting device is a guide groove provided on the base 1. The guide groove includes a reset groove 12 arranged parallel to the base 1 and a buffer groove 13 perpendicular to the reset groove 12. The reset groove 12 and the buffer groove 13 are connected by an arc groove 14. The bottom of the auxiliary slider 9 is provided with a guide post 15 that slides in the guide groove and restricts the movement trajectory of the auxiliary slider 9.

[0034] The working principle of the second embodiment: Compared with the first embodiment, the trajectory of the auxiliary slider in this embodiment is defined by an L-shaped trajectory groove composed of a reset groove 12, a buffer groove 13, and an arc groove 14. When the auxiliary slider moves into the buffer groove 13, it wobbles, causing the auxiliary slider hook to be hooked into the buffer groove 13 and separated from the reset boss. Since the reset boss has a certain length, when the position of the buffer slider and the reset slider exceeds the position of the buffer groove 13, the second hook slides on the side wall of the reset boss, locking the auxiliary slider in the buffer groove 13 and preventing it from disengaging.

[0035] Third embodiment: as follows Figure 9 , 10 As shown, unlike the first and second embodiments, the latching mechanism in this example is an opening groove 93 provided on the side wall of the auxiliary slider 9. Correspondingly, the reset slider 5 is provided with a first locking post 94 that cooperates with it. The auxiliary slider 9 latches or separates from the first locking post 94 through the opening groove 93, thereby realizing the linkage between the auxiliary slider 9 and the reset slider 5.

[0036] The working principle of the third embodiment is as follows: When the buffer opens outward, and the auxiliary slider 9 moves to the point where it disengages from the reset slider, the auxiliary slider 9 sways, causing its opening slot 93 to separate from the first locking pin 94, thus causing the second reset spring to lose its drag on the reset slider and the buffer slider. When the buffer closes, the auxiliary slider 9 resets under the action of the reverse impact, and re-engages with the first locking pin 94 through the opening slot 93, realizing the linkage between the auxiliary slider 9 and the reset slider 5. The second reset spring then pulls the reset slider and the buffer slider backward again, pulling the guide rail and the drawer to close.

[0037] Fourth embodiment: as Figure 11 As shown, the latching mechanism is an opening groove 93 provided on the side wall of the auxiliary slider 9. Correspondingly, the buffer slider 6 is provided with a second locking post 95 that cooperates with it. The buffer slider 6 is latched or separated from the second locking post 95 through the opening groove 93, so as to realize the linkage between the auxiliary slider 9 and the buffer slider 6.

[0038] The working principle of the fourth embodiment is similar to that of the third embodiment. The second locking post 9, which cooperates with the opening groove 93 on the side wall of the auxiliary slider 9, is set on the buffer slider 6, which can also realize the linkage function between the auxiliary slider 9 and the buffer slider 6.

[0039] In order to make the buffer look neater and more aesthetically pleasing and the related moving parts run more stably, a mask 16 is installed on the surface of the base 1 in this case. The mask 16 covers the auxiliary slider 9 and the second reset spring 10 inside it.

[0040] The face mask 16 is provided with an elastic buckle 17 on its side wall. The face mask 16 is fixed to the base 1 by the elastic buckle 17 and placed in the mounting plate 18 on the base 1.

[0041] The initial tension of the first reset spring 8 is greater than the initial tension of the second reset spring 10.

[0042] like Figure 12 As shown in Table B, the linear relationship between the tension and length of the first reset spring during operation is Fa-Fb, and the change in tension upon tripping is Fb-L1. The linear relationship between the tension and length of the second reset spring during operation is Fc-Fd, and the change in tension upon tripping is Fd-L2.

[0043] like Figure 12 As shown in Table C, in this case, a unique linkage mechanism links the first and second reset springs, causing the second reset spring to trip first during the opening process. Therefore, when the guide rail opens from L0 to L2, it trips, and the user-supplied tension changes linearly as F1-Fd. When the second spring trips later, the guide rail opens from L2 to L3, and the tension changes as Fd-Fc. When the user opens the guide rail to L1, the buffer completely trips from the guide rail, and the tension changes as Fc-Fb. After tripping, the guide rail can be opened to the fully open state. Through observation... Figure 12 The height of the tripping tension F2-L1 changes during the process described in Table A, and observations are made. Figure 12 In Table C, the change in trigger pull force Fb-L1 shows that, with L1 being the same, the value of F2 is much greater than the value of Fb. This makes the user feel a lighter touch when pulling the drawer outward, and the "weightlessness" experienced by the user when the buffer is fully disengaged is also less, thus improving the operational quality of opening the drawer.

[0044] When the drawer is closed, the first and second return springs engage with the return slider or the buffer slider in sequence. Ultimately, the combined force of the two return springs pulls the drawer to the closed position, ensuring sufficient closing force for large and heavy drawers. Therefore, compared to the traditional single-spring structure, this design uses two springs with different initial tensions working in tandem. This means that when the user opens the drawer, the initial movement is a double-spring motion, while the subsequent movement is a single-spring motion. This results in a lighter feel when the buffer disengages from the drawer, preventing the strong "weightlessness" caused by excessive inertia that could cause the drawer to lurch outwards, and improving the overall feel of opening and closing the drawer slides.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A double-spring linkage guide rail reset buffer, comprising a base (1), a reset guide rail (2) and a buffer guide rail (3) provided on the base (1), the reset guide rail (2) and the buffer guide rail (3) being vertically arranged and connected by an arc rail (4), a reset slider (5) and a buffer slider (6) being slidably mounted on the reset guide rail (2) and the buffer guide rail (3), the buffer slider (6) being connected to a damper (7) and a first reset tension spring (8) fixed on the base (1), the first reset tension spring (8) always pulling the reset slider (5) and the buffer slider (6) in the closing direction, the reset slider (5) and the buffer slider (6) being hinged together; characterized in that: The base (1) is also provided with an auxiliary limiting device, and the auxiliary slider (9) slides within the auxiliary limiting device, thus limiting the movement trajectory of the auxiliary slider (9). The auxiliary slider (9) is also provided with a buckling mechanism. When the auxiliary slider (9) slides in the auxiliary limiting device, the buckling mechanism engages or disengages with the reset slider (5) or the buffer slider (6) according to the design trajectory to achieve linkage. A second reset spring (10) is also provided between the auxiliary slider (9) and the base (1) to always pull the auxiliary slider (9) in the closing direction. The auxiliary limiting device consists of a guide boss (11) on the base (1) and a first hook (91) on the side wall of the auxiliary slider (9). The guide boss (11) protrudes from the upper end face of the base (1), and the first hook (91) slides on the side wall of the guide boss (11). When the first hook (91) of the auxiliary slider (9) moves to the front end of the guide boss (11), it swings and hooks onto the front end face of the guide boss (11). The latching mechanism is a second hook (92) set on the side wall of the auxiliary slider (9) and a reset boss (52) set on the reset slider (5) or the buffer slider (6). When the second hook (92) of the auxiliary slider (9) runs to the front end of the reset boss (52), it swings and the second hook (92) hooks onto the front end face of the reset boss (52).

2. The double-spring linkage guide rail reset buffer according to claim 1, characterized in that: The auxiliary limiting device is a guide groove set on the base (1). The guide groove includes a reset groove (12) set parallel to the base (1) and a buffer groove (13) perpendicular to the reset groove (12). The reset groove (12) and the buffer groove (13) are connected by an arc groove (14). The bottom of the auxiliary slider (9) is provided with a guide post (15) which slides in the guide groove and restricts the movement trajectory of the auxiliary slider (9).

3. The double-spring linkage guide rail reset buffer according to claim 1, characterized in that: The latching mechanism is an opening groove (93) provided on the side wall of the auxiliary slider (9). Correspondingly, the reset slider (5) is provided with a first locking post (94) that cooperates with it. The auxiliary slider (9) latches or separates from the first locking post (94) through the opening groove (93), thereby realizing the linkage between the auxiliary slider (9) and the reset slider (5).

4. The double-spring linkage guide rail reset buffer according to claim 1, characterized in that: The buckling mechanism is an opening groove (93) provided on the side wall of the auxiliary slider (9). Correspondingly, a second locking post (95) is provided on the buffer slider (6) to cooperate with it. The buffer slider (6) is buckled or separated from the second locking post (95) through the opening groove (93) to realize the linkage between the auxiliary slider (9) and the buffer slider (6).

5. A double-spring linkage guide rail reset buffer according to claim 1, characterized in that: The base (1) is equipped with a mask (16) which covers the auxiliary slider (9) and the second reset spring (10).

6. A double-spring linkage guide rail reset buffer according to claim 5, characterized in that: The mask (16) is provided with an elastic buckle (17) on its side wall. The mask (16) is fixed to the base (1) by the elastic buckle (17) in the mounting plate (18).

7. A double-spring linkage guide rail reset buffer according to claim 1, characterized in that: The initial tension of the first reset spring (8) is greater than the initial tension of the second reset spring (10).

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