CN112826256B

CN112826256B - Improved self-closing device

Info

Publication number: CN112826256B
Application number: CN202110034818.5A
Authority: CN
Inventors: 邹莲; 许兴隆; 钱峰; 季强; 查一帆; 朱冬; 戴凯
Original assignee: Wuxi Haidaer Precision Slides Co ltd
Current assignee: Wuxi Haidaer Precision Slides Co ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2022-10-04
Anticipated expiration: 2041-01-12
Also published as: CN112826256A

Abstract

The invention provides an improved self-closing device which is good in stability, simple in structure and more labor-saving in closing a drawer; the sliding guide structure comprises a cavity which is formed in the length direction of a main body strip, the side wall of the cavity is respectively provided with a first horizontal guide groove for the first sliding column to slide, a second horizontal guide groove for the second sliding column to slide, the front end of the first horizontal guide groove is communicated with a locking groove, the first horizontal guide groove and the second horizontal guide groove are arranged in parallel and staggered front and back, when the sliding rail is completely closed, the first sliding column and the second sliding column are positioned on the same inclined plane, and when the sliding rail is completely stretched, the first sliding column and the second sliding column are positioned on the same horizontal plane; one end of the spring is clamped in the omega-shaped clamping groove, and the other end of the spring is hooked on the second sliding column through the draw hook at the end part.

Description

Improved self-closing device

Technical Field

The invention relates to the technical field of drawer sliding rails, in particular to an improved self-closing device.

Background

The drawer sliding rail is a component for connecting the drawer and the cabinet body and enabling the drawer to be pushed and pulled smoothly, and the drawer sliding rail is usually provided with a self-closing device at present so as to prevent the problem that the drawer is pushed and pulled improperly, or the drawer and the cabinet body are collided violently, even the drawer rebounds, or the drawer can not be closed completely; for example, the self-closing device of the slide rail component disclosed in CN105815950a comprises a main body, a damping member, a spring, a slider and a pawl, wherein the slider is installed in a slide guide structure arranged on the main body, the damping member and the spring are respectively installed in a damping member installation groove and a spring groove on the main body and are both connected with the slider, the main body is fixedly installed on a fixed guide rail and the pawl in a drawer slide rail, and the slider is driven by the pawl to move back and forth in the slide guide structure and the slider releases and locks the pawl when the drawer is pushed and pulled, so that the drawer can be smoothly and gently opened and closed, and when the drawer is closed, the slider can realize an automatic and buffer closing effect after locking the pawl.

In the above-mentioned conventional self-closing device, the two positioning protrusions 422a, 422b on the slider 42 are respectively located at the front end and the rear end of the slider, the bottom surface of the slider 42 is provided with the groove 451, one end of the spring 45 is engaged in the groove 451, the slider 42 is accommodated in the cavity 411 of the sliding guide structure on the main body 41 and moves back and forth along the guide groove 412, the guide groove 412 includes the horizontal guide groove 4121 and the vertical guide groove 4122 in the downward direction, which are communicated with each other, when the slider 42 releases the pawl 43, the drawer can be opened, the positioning protrusion 422a at the front end of the slider 42 falls into the vertical guide groove 4122, the positioning protrusion 422b at the rear end is located in the horizontal guide groove 4121, that is, the slider 42 is in the inclined state of low front and high rear, and the spring 45 engaged with the slider is in the fully extended state, so that when the drawer is closed, the pawl 43 needs to push the slider 42 to change the inclined state of the low front end and high rear end into the horizontal state, even if the positioning protrusion 422a is disengaged from the vertical guide groove 4122 and is located in the horizontal guide groove 422b and the sliding guide rail is connected with the spring 4121, thereby the sliding guide rail of the drawer, the drawer is automatically pulled by the resilient force of the sliding guide rail 4142 and the sliding guide rail 4142.

That is, when the drawer is opened and closed, the slider 42 rotates around the vertical guide groove 4122 with the rear end positioning projection 422b always located in the horizontal guide groove 4121 as the center of rotation, and the slider 42 changes between the inclined state and the horizontal state to lock and release the pawl 43; on one hand, if the included angle between the horizontal guide groove 4121 and the downward vertical guide groove 4122 is too large, the positioning protrusion 422a at the front end of the slider 42 easily slides out of the vertical guide groove 4122, and is under the action of the restoring force of the spring, when the drawer is in an open state, the slider 42 returns to the position when the drawer is in a closed state, the pawl 43 cannot be locked with the slider 42 to achieve buffering self-closing of the closed drawer, so that the self-closing device fails, and particularly if the cabinet body vibrates under the action of external force, the stability of the self-closing device is worse.

On the other hand, if the angle between the horizontal guide groove 4121 and the downward vertical guide groove 4122 is too small, although the locking force of the vertical guide groove 4122 to the front end positioning protrusion 422a of the slider 42 can be enhanced, so as to enhance the stability of the self-closing apparatus, when the drawer is closed, before the pawl 43 enters the top groove 421 of the slider 42 and is locked with the slider, the action point of the pawl 43 pushing the slider 42 to rotate is the rear end groove wall 4212 of the top groove 421, and the rear end groove wall 4212 is close to the rotation center of the slider 42, i.e., the rear end positioning protrusion 422b, so that the pushing force required when the drawer is closed is large, about 7N or more, especially when the drawer contains heavy objects, the drawer is more difficult to close, and in addition, because one end of the spring 45 is engaged in the groove 451 on the bottom surface of the slider 42, the rotating angle force of the spring needs to be overcome, and the pushing force is also increased.

Disclosure of Invention

The invention provides an improved self-closing device, aiming at the problems that the drawer needs larger thrust when the drawer is closed by the existing self-closing device, the drawer is hard to close and the stability is influenced.

The invention adopts the following technical scheme: it includes main part, spring and slider, the main part is equipped with communicating sliding guide structure and spring groove, the slider is arranged in among the sliding guide structure, the spring is arranged in the spring inslot, the one end of spring with the slider links to each other its characterized in that: the sliding guide structure comprises a cavity which is formed in the length direction of the main body strip, a first horizontal guide groove and a second horizontal guide groove are formed in the side wall of the cavity respectively, the first horizontal guide groove and the second horizontal guide groove are used for allowing the first sliding column to slide, the front end of the first horizontal guide groove is communicated with a locking groove, the first horizontal guide groove and the second horizontal guide groove are arranged in a parallel and front-back staggered mode, when the sliding rail is completely closed, the first sliding column and the second sliding column are located on the same inclined plane, and when the sliding rail is completely stretched, the first sliding column and the second sliding column are located on the same horizontal plane; one end of the spring groove is communicated with the cavity, the other end of the spring groove and the main body are provided with omega-shaped clamping grooves, one end of the spring is clamped in the omega-shaped clamping grooves, and the other end of the spring is hooked on the second sliding column through a drag hook at the end part.

It is further characterized in that:

the shifting block comprises a block body, a front clamping tooth and a rear clamping tooth, the front clamping tooth and the rear clamping tooth are in shifting fit with the connecting groove of the sliding block, an installation plate is arranged in the middle of the block body, step grooves are symmetrically arranged at two ends of the block body on one side of the block body, and positioning columns are arranged on the other side of the block body and the end part of the installation plate;

the outer side surface of the front groove wall of the connecting groove is an arc-shaped guide surface; the shifting block forms a clamping opening matched with the front groove wall of the connecting groove between the front clamping tooth and the rear clamping tooth, and an inward concave self-rescue opening is formed in the shifting block at the rear part of the rear clamping tooth;

the locking groove is an arc locking groove;

an L-shaped groove is formed in the main body above the spring groove;

one end of the main body is provided with a linear clamping groove, the main body is provided with a bayonet, and a positioning block is arranged between the linear clamping groove and the bayonet and the main body;

the shifting block, the sliding block and the main body are all made of plastic materials.

After the structure is adopted, the second sliding column is arranged below the connecting groove instead of the rear end of the sliding block, on one hand, compared with the prior art, the second sliding column is closer to the first sliding column at the front end as a rotating support point, the power arm is increased, the resistance arm is reduced, the pushing force when the drawer is closed can be effectively reduced, and the drawer is lighter and more economical when a user closes the drawer; on the other hand, the second sliding column that is located the groove below of plugging into and the first sliding column of front end slide in two horizontal guide slots respectively, and in the department of taking place to rotate, compare prior art, the rotation orbit of first sliding column more matches with the guide effect of sliding guide structure, has further reduced the thrust when closing the drawer.

The spring is hooked on the second sliding column through the draw hook at the end part, so that the spring and the second sliding column serving as a rotating fulcrum are always in the same horizontal plane, and the thrust when the drawer is closed can be further reduced without overcoming the rotating angular force of the spring; and because of the spring hook hangs in the second slip post to make the block portion of spring and second slip post unite two into one with the second slip post among the prior art, not only optimized the structure, still reducible production and the degree of difficulty and the error of assembly.

Drawings

FIG. 1 is an exploded view of a first aspect of the present invention;

FIG. 2 is an exploded view of a second perspective of the present invention;

FIG. 3 is an exploded view of a third aspect of the present invention.

FIG. 4 is a schematic view of a first aspect of the present invention with the track fully closed;

FIG. 5 is a schematic structural view of a second aspect of the present invention with the slide rail fully closed;

fig. 6 is a third perspective view of the present invention when the slide rail is fully closed.

Fig. 7 is a schematic structural view of the present invention when the slide rail is fully extended.

FIG. 8 is a schematic view of the slider and spring connection of the present invention;

fig. 9 is an enlarged schematic view of a point a in fig. 8.

FIG. 10 is a schematic diagram of a first perspective of an application of the present invention;

FIG. 11 is a schematic diagram of a second perspective of an exemplary application of the present invention;

fig. 12 is an assembly structure diagram of an application example of the present invention.

Detailed Description

The invention is further described with reference to the accompanying drawings in which:

as shown in fig. 1 to 12, the present invention provides an improved self-closing device, which includes a main body 4, a spring 3, and a slider 2, as shown in fig. 6, the main body 4 is provided with a sliding guide structure and a spring groove 412 which are communicated with each other, the slider 2 is disposed in the sliding guide structure, the spring 3 is disposed in the spring groove 412, one end of the spring 3 is connected to the slider 2, the device further includes a shifting block 1, as shown in fig. 1~3, a connection groove 201 is disposed at the top of the slider 2, the shifting block 1 is in sliding fit with the slider 2 through the connection groove 201, a first sliding column 202 is disposed at the front end of the slider 2, a second sliding column 203 is disposed below the connection groove 201 and the slider 2, as shown in fig. 1 to 7, the sliding guide structure includes a cavity 402 formed along the length direction of the main body 4, a first horizontal guide groove 405 for the first sliding column 202 and a second horizontal guide groove 410 for the second sliding column 203 are disposed on the side walls of the cavity 402, the first horizontal guide groove 405 is communicated with a locking groove 406, the first horizontal guide groove and the second sliding column 405 and the slider 2 is disposed in parallel to facilitate the slider 2 to rotate in a front-back-and back direction; preferably, the first sliding column 202 and the second sliding column 203 are respectively crossed with the slider 2, so that a balanced and stable sliding end is formed on two sides of the slider 2; the first horizontal guide groove 405, the locking groove 406 and the second horizontal guide groove 410 are all symmetrically arranged on two side walls of the cavity 402, namely an outer side wall 407 and an inner side wall 408 close to one side of the slide rail, wherein the first horizontal guide groove 405, the locking groove 406 and the second horizontal guide groove 410 on the inner side wall 408 are all through grooves, and the second horizontal guide groove 410 on the outer side wall 407 does not penetrate through the outer side wall 407 of the cavity 402, so that the appearance can be improved, the stable sliding and rotating of the slider can be ensured, and the stability of the self-closing device can be improved.

When the sliding rail is completely closed, the first sliding column 202 and the second sliding column 203 are located on the same slope, as shown in fig. 5, the first sliding column 202 is located at the rear end of the first horizontal guide groove 405, the second sliding column 203 is located at the rear end of the second horizontal guide groove 410, the axial connecting line L1 of the first sliding column 202 and the second sliding column 203 is inclined to the stretching or closing direction of the sliding rail, and when the sliding rail is completely stretched, the first sliding column 202 and the second sliding column 203 are located on the same horizontal plane, as shown in fig. 7, the first sliding column 202 is limited at the bottom of the locking groove 406, the second sliding column 203 is located at the front end of the second horizontal guide groove 410, and the axial connecting line L2 of the first sliding column 202 and the second sliding column 203 is parallel to the stretching or closing direction of the sliding rail, so that the second sliding column 203 serving as a rotation fulcrum is located below the docking groove 201 and also located below the first sliding column 202 at the rotation end, and when the sliding block rotates, on the one hand, the second sliding column serves as a rotation fulcrum and is closer to the first sliding column, and the resistance of the sliding arm is increased and the closing force of the drawer is reduced; on the other hand, the rotating track of the first sliding column can be matched with the guiding function of the sliding guide structure, and the pushing force when the drawer is closed is further reduced.

As shown in fig. 3 and 6, one end of the spring slot 412 is communicated with the cavity 402, the other end of the spring slot 412 and the main body 4 are provided with the omega-shaped clamping groove 413, one end 302 of the spring 3 is clamped in the omega-shaped clamping groove 413, the other end of the spring 3 is hooked on the second sliding column 203 through the draw hook 301 at the end part, and the draw hook 301 is hooked on the second sliding column in a ring shape, so that the angle change of the connecting end of the spring and the sliding block due to the rotation of the sliding block can be avoided, and the pushing force when the drawer is closed is further reduced; the omega-shaped clamping groove can enhance the clamping stability of the spring and the main body and ensure the stability and effectiveness of the self-closing device; preferably, as shown in fig. 8 and 9, an avoiding groove 206 is formed in the second sliding column 203 and the sliding block 2, a limiting bar 207 is arranged on the second sliding column 203, and when the spring 3 is hooked on the second sliding column 203, the avoiding groove 206 can accommodate a draw hook 301 and the limiting bar 207 to prevent the spring 3 from slipping, so that the stability of the self-closing device is improved.

As shown in fig. 1~5, the shifting block 1 includes a block body 101, a front latch 105 and a rear latch 106, the front latch 105 and the rear latch 106 are in shifting fit with the connecting groove 201 of the slider 2, the middle portion of the block body 101 is provided with a mounting plate 103, one side of the block body 101 is symmetrically provided with step grooves 102 at two ends of the block body 101, and the other side of the block body 101 is provided with a positioning column 107 at an end portion of the mounting plate 103; preferably, the mounting plate 103 is in a suspended state and symmetrically arranged on the block body 101, and the positioning columns 107 are also symmetrically arranged at the end part of the suspended end of the mounting plate 103, so that the mounting plate 103 is slightly deformed, and the convenience and accuracy of mounting the shifting block 1 are improved.

Preferably, the shifting block 1, the sliding block 2 and the main body 4 are all made of plastic materials and are integrally formed, so that the processing and the replacement are convenient, and the service life is prolonged; as shown in fig. 1 and fig. 3, the outer side surface 204b of the front groove wall 204 of the docking groove 201 is an arc-shaped guide surface; the shifting block 1 forms a clamping opening 108 matched with the front groove wall 204 of the connecting groove between the front clamping tooth 105 and the rear clamping tooth 106, and the shifting block 1 is provided with an inward concave self-rescue opening 104 at the rear part of the rear clamping tooth 106; when the sliding rail is completely stretched, namely the drawer is opened, and the first sliding column 202 at the front end of the sliding block 2 is separated from the locking groove 406, and the sliding block 2 is pulled back to the rear end of the cavity 402 under the restoring force of the spring 3, namely the position when the sliding rail is completely closed, the drawer is closed, the sliding block cannot normally lock the shifting block, so that the self-closing device fails, at the moment, the sliding block 2 can be pulled back to the front end of the cavity 402 through the concave self-rescue opening 104, the clamping opening 108 and the front groove wall 204 of the connecting groove, so that the first sliding column 202 at the front end of the sliding block 2 can fall into the locking groove 406 again, and self-rescue of the self-closing device is realized: pushing the movable rail and driving the shifting block 1 to move along the closing direction of the sliding rail, when the rear latch 106 of the shifting block 1 contacts the arc-shaped guide outer side surface 204b of the front groove wall 204 of the connecting groove 201, the rear latch 106 of the shifting block 1 is thinner than the front latch 105 due to the concave self-rescue opening 104 at the rear part of the rear latch 106, so that the rear latch 106 is slightly deformed to cross the arc-shaped guide outer side surface 204b and enter the connecting groove 201, the front groove wall 204 of the connecting groove is clamped in the clamping opening 108 of the shifting block 1, then the movable rail is pulled and the shifting block 1 is driven to move along the stretching direction of the sliding rail, namely, the sliding block is pulled to move towards the front end of the cavity 402 by the front groove wall 204 of the connecting groove, when the second sliding column 203 slides to the vicinity of the front end of the second horizontal guide groove 410, a slightly strong pulling force is applied to the movable rail, so that the first sliding column 202 falls into the locking groove 406 again, and the clamping opening 108 is separated from the front groove wall 204 of the connecting groove 201, and the sliding block of the self-closing device is restored to the normal state as shown in fig. 7; preferably, the outer side surface 205b of the rear groove wall 205 of the docking groove 201 is also an arc-shaped guide surface, so that the aesthetic property can be improved, the abrasion among all parts of the self-closing device can be reduced, and the service life can be prolonged.

As shown in fig. 1~3, the locking groove 406 is an arc-shaped locking groove, which facilitates the smooth rotation of the slider 2 and reduces the difficulty in opening and closing the drawer; as shown in 4~6, the body is provided with an L-shaped groove 403 above the spring groove 412 to prevent deformation during processing of the body; one end of the main body 1 is provided with a linear clamping groove 401, the main body is provided with a bayonet 411, and a positioning block 409 is arranged between the linear clamping groove 401 and the bayonet 411 and the main body 1; preferably, the positioning block 409 close to the linear clamping groove 401 is a cuboid positioning block, the positioning block 409 close to the bayonet 411 is a right-angle step positioning block, and the assembling stability of the main body and the sliding rail can be enhanced; the bayonet 411 penetrates the body 1 in the width direction of the body 1, so that the viewing port 404 is formed at the side of the body 1 opposite to the bayonet 411, thereby facilitating the assembly, disassembly and maintenance.

The working principle is that as shown in fig. 10 to 12, taking a three-section slide rail 5 as an example, the slide rail 5 comprises a fixed rail 501, a middle rail 502 and a movable rail 503, the fixed rail 501 can be mounted in a cabinet body through a mounting bracket 6, the movable rail 503 is connected with a drawer, as shown in fig. 1~3 and fig. 12, a shifting block 1 and the movable rail 503 are matched and positioned through a positioning column 107 and a first positioning hole 8 and are clamped and connected with a first clamping hook 9 through a step groove 102, and the assembly is simple and reliable; in addition, as the main body and the fixed rail are in matched connection with the second hook 7 through the linear clamping groove 401 and the bayonet 411, compared with a CN105815950A 'self-closing device of a slide rail component' in which a hook arranged at the rear end of the main body can only be assembled at the rear end of the fixed rail, the main body and the fixed rail are not limited to be assembled at the rear end, so that the assembly is more flexible, and the slide rail component can be conveniently applied to slide rails with different specifications and lengths.

When the drawer is completely closed in the cabinet body, that is, the slide rail is completely closed, as shown in fig. 1~6, fig. 10 and fig. 12, the dial block 1 and the slide block 2 are locked through the connection groove 201, that is, the front groove wall 204 limits the front latch 105 of the dial block 1 from the front end through the inner side surface 204a, and the rear groove wall 205 limits the rear latch 106 of the dial block 1 from the rear end through the inner side surface 205a, so that the dial block 1 is locked in the connection groove 201 through the front latch 105 and the rear latch 106, and since the dial block 1 is clamped in the movable rail 503, the movable rail 503 and the fixed rail 501 are locked by the dial block 1 and the slide block 2, and the two rails do not slide relatively, thereby ensuring the completely closed state of the drawer.

When an external force is applied to pull out the drawer, that is, to pull the movable rail 503 of the sliding rail 5, as shown in fig. 1~2 and fig. 7, the shifting block 1 locked in the connecting slot 201 at the top of the sliding block 2 drives the sliding block 2 to move together, that is, the sliding block 2 slides in the cavity 402 in the sliding rail pulling direction through the first sliding column 202, the first horizontal guide slot 405, the second sliding column 203 and the second horizontal guide slot 410, and the sliding block 2 simultaneously drives the spring 3 to stretch, when the first sliding column 202 slides to the junction of the first horizontal guide slot 405 and the locking slot 406, the second sliding column 203 slides to the vicinity of the front end of the second horizontal guide slot 410, and when the movable rail 503 continues to move forward, the first sliding column 202 rotates with the second sliding column 203 as a rotation fulcrum and falls into the locking slot 406 under the action of inertia and gravity, the sliding block 2 and the connecting slot 201 thereon incline and assume a state of low front and high back, and when the first sliding column 202 falls into the bottom of the locking slot 406, the second sliding column 203 is located at the front end of the second horizontal guide slot 410 and the sliding block 201 is located at the same position as the bottom of the second horizontal guide slot 410, and releases the shifting block 1, and releases the sliding block 1 of the sliding block 2, and releases the sliding block 1, and releases the sliding block 2 from the sliding block 1, and releases the sliding block 2 in the sliding slot 410.

When the drawer is closed by applying an external force, that is, the drawer is pushed to drive the movable rail 503 of the sliding rail 5 to move towards the rear end, as shown in fig. 2 and fig. 7, the shifting block 1 moves along with the movement, the rear latch 106 enters the inclined docking slot 201 first, as the movable rail 503 continues to be pushed, the rear latch 106 touches the rear slot wall 205 of the docking slot 201 and applies a backward pushing force to the inner side surface 205a of the rear slot wall 205, so that the slider 2 has a tendency of changing from the inclined state to the horizontal state, the first sliding column 202 rotates along with the second sliding column 203 as a rotation fulcrum and slides from the locking slot 406 to the first horizontal guide slot 405, and when the first sliding column 202 slides onto the first horizontal guide slot 405, the front latch 105 of the shifting block 1 enters the docking slot 201 along with the first sliding column, the slider 2 becomes the horizontal state and locks the shifting block 1, as the restoring force of the spring 3, the spring 3 pulls the slider 7 to slide towards the rear end in the cavity 402 and drives the shifting block 1 to move, so that the shifting block 503 is closed again, and the drawer can automatically move towards the cabinet body without applying a buffering force as shown in the cabinet body 10.

When the drawer is closed, the shifting block 1 touches the rear groove wall 205 of the docking groove 201 and applies a backward thrust to the inner side surface 205a of the rear groove wall 205 as a power end, and the first sliding column 202 falling into the bottom of the locking groove 406 is a resistance end, as shown in fig. 1, 5 and 7, the second sliding column is arranged below the docking groove from the rear end of the sliding block, on one hand, compared with CN105815950a, the second sliding column is closer to the first sliding column at the front end as a rotation support, so that the distance between the second sliding column 203 and the rear groove wall 205 is increased, and the distance between the second sliding column 203 and the first sliding column 202 is reduced, i.e., the power arm is increased and the resistance arm is reduced, thereby according to the lever principle, the thrust when the drawer is closed can be effectively reduced, i.e., the user is lighter and more economical when the drawer is closed.

On the other hand, the second sliding column positioned below the docking slot and the first sliding column at the front end respectively slide in the two horizontal guide grooves, at the rotating position, namely the connecting position of the first horizontal guide groove 405 and the locking groove 406, the second sliding column 203 serving as a rotating fulcrum is positioned below the first sliding column 202 at the rotating end, so that the rotating track of the first sliding column can be better matched with the first horizontal guide groove 405 and the locking groove 406, and when the drawer is closed, compared with the pushing force applied by the shifting block 1 in CN105815950A, the pushing force applied by the shifting block 1 can overcome the traction force of the rotating fulcrum on the front end positioning projection, the pushing force applied by the shifting block 1 can enable the sliding block to generate a self-rotating effect by taking the second sliding column 203 as a rotating shaft, so that the pushing force when the drawer is closed is further reduced.

Because the spring is connected with the second sliding column through the drag hook at the end part and the drag hook is hung on the second sliding column in an annular shape, when the drawer is closed, compared with CN105815950A, the invention needs to overcome the rotating angle force of the spring, the spring and the second sliding column which is used as a rotating fulcrum are always in the same horizontal plane, the rotation of the first sliding column can not influence the change of the angle of the spring, thereby further reducing the thrust when the drawer is closed; the spring is hooked on the second sliding column, so that the clamping part of the spring and the second sliding column in the CN105815950A and the second sliding column are combined into a whole in the invention, the structure is optimized, and the difficulty and the error of production and assembly can be reduced; through the thrust of 10 ten thousand times life-spans of quick trial assembly test, can make the thrust of closing the drawer reduce to more than 3N more than by more than 7N through above-mentioned structure to the drawer is closed more lightly sparingly, can effectively improve user's use and experience.

Claims

1. The improved self-closing device comprises a main body, a spring and a sliding block, wherein the main body is provided with a sliding guide structure and a spring groove which are communicated, the sliding block is arranged in the sliding guide structure, the spring is arranged in the spring groove, and one end of the spring is connected with the sliding block, and the improved self-closing device is characterized in that: the sliding guide structure comprises a cavity which is formed in the length direction of the main body strip, a first horizontal guide groove and a second horizontal guide groove are formed in the side wall of the cavity respectively, the first horizontal guide groove and the second horizontal guide groove are used for allowing the first sliding column to slide, the front end of the first horizontal guide groove is communicated with a locking groove, the first horizontal guide groove and the second horizontal guide groove are arranged in a parallel and front-back staggered mode, when the sliding rail is completely closed, the first sliding column and the second sliding column are located on the same inclined plane, and when the sliding rail is completely stretched, the first sliding column and the second sliding column are located on the same horizontal plane; one end of the spring groove is communicated with the cavity, an omega-shaped clamping groove is formed in the other end of the spring groove and the main body, one end of the spring is clamped in the omega-shaped clamping groove, and the other end of the spring is hooked on the second sliding column through a draw hook at the end part;

the locking groove is an arc-shaped locking groove.

2. The improved self-closing device of claim 1, wherein: the shifting block comprises a block body, a front clamping tooth and a rear clamping tooth, the front clamping tooth and the rear clamping tooth are in shifting fit with the connection groove of the sliding block, a mounting plate is arranged in the middle of the block body, step grooves are symmetrically formed in two ends of the block body, and positioning columns are arranged on the other side of the block body and the end portion of the mounting plate.

3. The improved self-closing device of claim 2, wherein: the outer side surface of the front groove wall of the connecting groove is an arc-shaped guide surface; the shifting block forms a clamping opening matched with the front groove wall of the connecting groove between the front clamping tooth and the rear clamping tooth, and an inward concave self-rescue opening is formed in the shifting block at the rear part of the rear clamping tooth.

4. The improved self-closing device of claim 1, wherein: an L-shaped groove is formed above the spring groove and on the main body.

5. The improved self-closing device of claim 1, wherein: the positioning device is characterized in that a linear clamping groove is formed in one end of the main body, a bayonet is formed in the main body, and a positioning block is arranged between the linear clamping groove and the bayonet and the main body.

6. The improved self-closing device of claim 1, wherein: the shifting block, the sliding block and the main body are all made of plastic materials.