CN220365502U

CN220365502U - Novel telescopic door fence

Info

Publication number: CN220365502U
Application number: CN202321818379.8U
Authority: CN
Inventors: 王红娟
Original assignee: Guangzhou Xuya Household Items Co ltd
Current assignee: Guangzhou Xuya Household Items Co ltd
Priority date: 2023-07-11
Filing date: 2023-07-11
Publication date: 2024-01-19
Anticipated expiration: 2033-07-11

Abstract

The utility model discloses a novel telescopic door rail, which is characterized in that a ratchet wheel, a pawl and a torsion spring are arranged in an upper fixing seat of the telescopic door rail, and the ratchet wheel can be limited to pivot towards the direction of unfolding a curtain body when the pawl is meshed with the ratchet wheel. The unlocking piece and the driving piece are movably arranged in the upper fixing seat respectively, the unlocking piece can push the pawl away from the ratchet wheel or enable the pawl to be meshed with the ratchet wheel, the first top spring applies elastic force to the unlocking piece, which moves away from the direction of the pawl, the driving piece can ascend or descend to be away from the unlocking piece or contact with the unlocking piece and force the unlocking piece to move between the positions where the unlocking piece is in forward movement to unlock the ratchet wheel, the ratchet wheel and the pawl are disengaged in a manner that the driving piece is in downward movement by being pressed by external force, so that the ratchet wheel is unlocked, the ratchet wheel and the pawl can be meshed again by the elastic force applied by the first top spring after the external force is cancelled, the whole structure is simple, the operation is convenient, the unlocking is not easy, and the situation that a child plays by pulling the curtain body can not occur.

Description

Novel telescopic door fence

Technical Field

The utility model relates to the technical field of child protection products, in particular to a novel telescopic door rail.

Background

In order to prevent accidents such as walking away and personal injury caused by the infant going out from the room, people often install a telescopic protective door rail on the indoor door. The protective door rail mainly comprises an upper fixing seat, a lower fixing seat, a scroll component, a curtain body and the like, wherein the curtain body is connected with the scroll component and can be pulled out, and the curtain body can be automatically rolled up through the scroll component.

The locking mechanism is generally arranged in the upper fixing seat, the reel assembly can not rotate after locking and can not unwind or retract the curtain body, and the reel assembly can automatically rotate after unlocking, so that the curtain body can be automatically wound.

The telescopic protective door rail on the market at present has some problems, such as complex locking structure of the telescopic protective door rail, inconvenient assembly, easy unlocking of the scroll component, and certain danger in the situation that children can play by pulling the curtain body.

Disclosure of Invention

The utility model mainly aims to provide a novel telescopic door rail, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the utility model provides a novel telescopic door rail, which comprises a scroll component, a curtain body arranged on the scroll component, an upper fixing seat and a lower fixing seat respectively assembled at the upper end and the lower end of the scroll component, wherein the upper fixing seat is provided with a locking mechanism,

the locking mechanism comprises a ratchet wheel, a pawl and a torsion spring, wherein the ratchet wheel is connected with the upper end of the scroll component and can pivot along with the rotation of the scroll component, the pawl can swing between a position meshed with the ratchet wheel and a position far away from the ratchet wheel, the torsion spring exerts elastic force on the pawl which swings towards the meshing direction of the ratchet wheel, and the pawl can limit the ratchet wheel to pivot towards the direction of unfolding the curtain body when the pawl is meshed with the ratchet wheel;

the upper fixing seat is movably provided with an unlocking piece and a driving piece respectively, the unlocking piece can move between positions where the pawl is pushed to be far away from the ratchet wheel by advancing and positions where the pawl is far away from the pawl by retreating, the driving piece can move between positions where the unlocking piece is lifted away from the unlocking piece, and the unlocking piece is contacted with the unlocking piece in a descending mode and is forced to do advancing movement to unlock the ratchet wheel, and a first top spring is further arranged and used for applying elastic force for the unlocking piece to move in a direction far away from the pawl.

The technical scheme of the utility model is that a locking mechanism is arranged in an upper fixed seat of the telescopic door rail, the locking mechanism comprises a ratchet wheel which is connected with the upper end of a scroll component and can rotate along with the scroll component, a pawl which can swing between a position meshed with the ratchet wheel and a position far away from the ratchet wheel, and a torsion spring which can apply elastic force for the pawl to swing towards the meshing direction of the ratchet wheel, and when the pawl is meshed with the ratchet wheel, the ratchet wheel can be limited to pivot towards the direction of unfolding the curtain body. The unlocking piece and the driving piece are movably arranged in the upper fixing seat respectively, the unlocking piece can move forwards or backwards to push the pawl away from the ratchet wheel or keep away from the pawl to enable the pawl to be meshed with the ratchet wheel, the first top spring applies elastic force to the unlocking piece to move away from the pawl, the driving piece can move upwards or downwards to keep away from the unlocking piece or contact with the unlocking piece and force the unlocking piece to move between positions where the unlocking piece moves forwards to unlock the ratchet wheel, the driving piece can be pressed by external force to enable the driving piece to do the descending motion, so that the ratchet wheel and the pawl are disengaged, the ratchet wheel can be unlocked, the curtain body can be unfolded or retracted, the ratchet wheel and the pawl can be meshed again by the elastic force applied by the first top spring after the external force is cancelled, the whole structure is simple, the operation is convenient, and the unlocking is difficult to occur, and the condition that a child plays by pulling the curtain body can not occur.

Drawings

FIG. 1 is an exploded view of an upper mounting bracket;

FIG. 2 is a first angle schematic view of the upper fixing base after the upper cover is hidden;

FIG. 3 is a schematic view of the upper fixing base at a second angle after the upper cover is hidden;

fig. 4 is a perspective view of the upper cover;

FIG. 5 is a perspective view of the upper fixture seat;

FIG. 6 is a schematic diagram of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiment of the present utility model, directional indications (such as up, down, left, right, front, rear, top, bottom, inner, outer, vertical, lateral, longitudinal, counterclockwise, clockwise, circumferential, radial, axial … …) are referred to, and the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first" or "second" etc. in the embodiments of the present utility model, the description of "first" or "second" etc. is only for descriptive purposes, and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a novel telescopic door rail.

In the embodiment of the present utility model, as shown in fig. 1 to 6, the novel retractable door rail includes a roller assembly 100, a curtain body 200 disposed on the roller assembly 100, and an upper fixing base 300 and a lower fixing base 400 respectively assembled on the upper and lower ends of the roller assembly 100, wherein the upper fixing base 300 is provided with a locking mechanism, and is characterized in that:

the locking mechanism comprises a ratchet 11, a pawl 12 and a torsion spring (not shown), wherein the ratchet 11 is connected with the upper end of the scroll assembly 100 and can pivot along with the rotation of the scroll assembly 100, the pawl 12 can swing between a position meshed with the ratchet 11 and a position far away from the ratchet 11, the torsion spring applies elastic force for swinging the pawl 12 towards the meshing direction of the ratchet 11, and the pawl 12 can limit the ratchet 11 to pivot towards the direction of the unfolding curtain 200 when meshed with the ratchet 11;

the upper fixing seat 300 is movably provided with an unlocking member 21 and a driving member 22, the unlocking member 21 can move between a position where the pawl 12 is pushed to be far away from the ratchet 11 and a position where the pawl 12 is pulled back to be far away from the ratchet, the driving member 22 can move between a position where the unlocking member 21 is lifted away from the ratchet and a position where the unlocking member 21 is contacted with the ratchet and is forced to move forward to unlock the ratchet 11, and a first top spring 23 is further provided, and the first top spring 23 is used for applying elastic force to the unlocking member 21 to move in a direction far away from the pawl 12.

Specifically, the upper fixing base 300 is provided with a pressing component, and the pressing component includes the driving element 22, an annular mounting ring 24, a second top spring 25 and a pressing element 26;

the mounting ring 24 is fixedly connected with the upper fixing seat 300, a plurality of first vertical long-strip-shaped wedge strips 241 are arranged along the inner side wall of the mounting ring 24 at intervals, long-strip-shaped guide grooves 242 are formed between two adjacent first wedge strips 241, one of the two adjacent guide grooves 242 is provided with a second vertical long-strip-shaped wedge strip 243, and the second wedge strip 243 is shorter than the first wedge strip 241;

the driving member 22 is vertically provided with a third wedge strip 221 which can be inserted into the guide groove 242 at a position corresponding to the guide groove 242, the lower end wall of the first wedge strip 241, the lower end wall of the second wedge strip 243 and the upper end wall of the third wedge strip 221 are inclined surfaces, and the inclination direction of the inclined surface of the third wedge strip 221 is opposite to the inclination direction of the inclined surfaces of the first wedge strip 241 and the second wedge strip 243;

the pressing piece 26 is adapted to the inner side of the mounting ring 24, the bottom wall of the pressing piece 26 extends into the inner side of the mounting ring 24 and then abuts against the third wedge strip 221, a clamping block 261 is arranged at a position of the outer side wall of the pressing piece 26 corresponding to the second wedge strip 243, the clamping block 261 can extend into the guiding groove 242 and is opposite to the second wedge strip 243 to limit the pressing piece 26 to separate from the mounting ring 24, the bottom wall of the pressing piece 26 is provided with an annular tooth surface 262, one part of the inclined surface of the third wedge strip 221 is positioned in the guiding groove 242, and the other part abuts against the tooth surface 262;

the second top spring 25 is located below the driving member 22, and is used for applying an elastic force to the driving member 22, wherein the elastic force moves in a direction of inserting the third wedge strip 221 into the guiding groove 242.

The pressing piece 26 can be pressed down by an external force to drive the driving piece 22 to move downwards to unlock the ratchet 11, meanwhile, the third wedge strip 221 is forced to withdraw from the guide groove 242, the driving piece 22 is pivoted relative to the mounting ring 24 through the elastic force exerted by the second top spring 25 and the inclined plane of the first wedge strip 241 is matched with the inclined plane of the third inclined plane, so that the inclined plane of the third wedge strip 221 moves to be kept against the inclined plane of the second wedge strip 243 to keep the unlocking state of the ratchet 11, after the pressing piece 26 is pressed down again, the third wedge strip 221 is forced to separate from the second wedge strip 243 and withdraw from the guide groove 242, the driving piece 22 is pivoted relative to the mounting ring 24 through the elastic force exerted by the second top spring 25 and the inclined plane of the first wedge strip 241 is matched with the inclined plane of the third inclined plane, so that the driving piece 22 is lifted away from the unlocking piece 21, the third wedge strip 221 moves into the insertion guide groove 242, the first top spring 23 exerts the elastic force to force the unlocking piece 21 away from the pawl 12, so that the pawl 12 is meshed with the ratchet 11, and the ratchet 11 is locked.

Specifically, a support member 27 is fixedly installed in the upper fixing seat 300 at a position corresponding to the position between the driving member 22 and the ratchet 11, the support member 27 is provided with a vertical connecting shaft 271, the driving member 22 and the second top spring 25 are movably sleeved on the connecting shaft 271, one end of the second top spring 25 is connected with the support member 27, and the other end of the second top spring is elastically abutted against the bottom wall of the driving member 22.

Specifically, a knob 28 is further provided, an accommodating groove 500 for accommodating the knob 28 is formed in the top of the upper fixing seat 300, the mounting ring 24 is arranged on the bottom wall of the accommodating groove 500, the inner side of the mounting ring 24 is communicated with the accommodating groove 500, a strip-shaped connecting portion 281 is arranged at the bottom of the knob 28 corresponding to the pressing piece 26, the connecting portion 281 is locally embedded into the top of the pressing piece and locked through a screw, a plurality of positioning holes 501 surrounding the mounting ring 24 are annularly formed in the bottom wall of the accommodating groove 500 at intervals, positioning posts 282 extend downwards at the bottom of the knob 28 corresponding to the positioning holes 501, the knob 28 can rotate between positions enabling the positioning posts 282 and the positioning holes 501 to be aligned and staggered relative to the pressing piece 26, and after the knob 28 rotates to align the positioning posts 282 with the positioning holes 501, the pressing piece 26 can be forced to move downwards through the connecting portion 281 in a mode of pressing the knob 28, so that the driving piece 22 can move downwards.

Specifically, the bottom wall of the accommodating groove 500 further penetrates through a long-strip-shaped guide hole 502 communicated with the inside of the upper fixing seat 300, a guide post 283 capable of extending into the guide hole 502 is arranged at the bottom of the knob 28, the guide post 283 can swing within the range of the guide hole 502 along with the rotation of the knob 28, a tension spring 503 connected with the guide post 283 is further arranged in the upper fixing seat 300, and the tension spring 503 applies a tension force for moving in a direction staggered with the positioning hole 501 to the positioning post 282 through the guide post 283.

Specifically, the locking piece 3 with the latch 31 is pivotally mounted on the side, away from the ratchet 11, of the upper fixing seat 300 corresponding to the pawl 12, a clamping groove (not shown) is formed in the side, close to the locking piece 3, of the pawl 12, the locking piece 3 can swing between a position where the latch 31 is clamped into the clamping groove and a position where the pawl 12 is far away from the pawl, a third top spring 30 is further arranged, and an elastic force swinging towards the direction where the latch 31 is clamped into the clamping groove is applied to the locking piece 3 through the third top spring 30, so that the pawl 12 can be locked after the latch 31 is clamped into the clamping groove.

Specifically, the top walls of the pawl 12 and the locking member 3 extend upward to form a first urging portion 121 and a second urging portion 32, the unlocking member 21 is provided with a first pushing portion 211 and a second pushing portion 212, and the first urging portion 121 and the second urging portion 32 can be pushed by the first pushing portion 211 and the second pushing portion 212 during the forward movement of the unlocking member 21, so that the pawl 12 and the ratchet 11 are simultaneously unlocked.

Specifically, the upper fixing base 300 includes an upper cover 301 and a base 302, the upper cover 301 and the base 302 are detachably connected and fixed by a fastening structure or are detachably locked by a screw to form an accommodating space for accommodating the locking mechanism, and the adjusting knob 28 is located outside the upper cover 301.

Specifically, the mating surface of the upper fixing base 300 and the position to be installed is detachably provided with a connecting piece 4 for fixedly connecting with the position to be installed, the connecting piece 4 is integrally in a plate-shaped structure, the upper side, the left side and the right side of the connecting piece 4 are outwards provided with extension parts 41, a step shape is formed between the connecting piece 4 and the extension parts 41, the upper fixing base 300 is provided with an installation groove 303 with a bottom opening, one side of the installation groove 303 close to the position to be installed is provided with a partial opening, and the connecting piece 4 can be vertically inserted into the installation groove 303 through the bottom opening of the installation groove 303 so that the extension parts 41 are horizontally opposite to the inner wall of the installation groove 303 to limit the connecting piece 4 from being separated from the installation groove 303 from the horizontal direction;

the locking piece 5 is movably mounted in the upper fixing seat 300, the locking piece 5 is provided with a driving part 51 and a locking part 52, one side, close to the locking piece 5, of the connecting piece 4 is provided with a lock hole 42 for horizontally inserting the locking part 52, the locking part 52 can limit the connecting piece 4 to be separated from the mounting groove 303 from the vertical direction when being positioned in the lock hole 42, one end of the fourth top spring 6 is fixedly connected with the inner side of the upper fixing seat 300, the other end of the fourth top spring is elastically abutted against the locking piece 5, the fourth top spring is used for applying elastic force to the locking piece 5 for inserting the locking part 52 into the lock hole 42, the driving part 51 vertically penetrates through the bottom wall of the upper fixing seat 300 and is exposed outside, the driving piece 22 can be driven to move towards the direction that the locking part 52 is separated from the lock hole 42 through external force, the fourth top spring is compressed, and after the applied external force is cancelled, the fourth top spring releases the elastic force to push the locking piece to insert the locking part into the lock hole.

Specifically, the bottom of the upper fixing seat is provided with a strip-shaped avoiding hole, and the driving part vertically passes through the avoiding hole and then is exposed outside.

Specifically, the unlocking member 21 has a strip structure, one end of the unlocking member 21, which is close to the driving member 22, extends obliquely downward to form a guiding portion 213 with an inclined surface, and the edge of the driving member 22 can force the unlocking member 21 to move forward through the inclined surface in the descending process.

The upper fixing base 300 can be detachably assembled with the position to be mounted through the detachable matching with the connecting piece 4 so as to be convenient for quick mounting or dismounting.

Specifically, the top wall of the unlocking member 21 is provided with a first mark 214 and a second mark 215 adjacent to each other, the upper fixing seat 300 is provided with an observation window 304 communicated with the interior of the upper fixing seat 300, when the ratchet 11 is locked, the first mark 214 is aligned with the observation window 304, and when the ratchet 11 is unlocked, the second mark 215 is aligned with the observation window 304, i.e. the first mark 214 is in a locked state, and the second mark 215 is in an unlocked state.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. The utility model provides a novel flexible door fence, includes spool subassembly (100), locates curtain body (200) of spool subassembly (100) and assembles fixing base (300) and lower fixing base (400) on both ends about spool subassembly (100) respectively, goes up fixing base (300) and is equipped with locking mechanical system, its characterized in that:

the locking mechanism comprises a ratchet wheel (11), a pawl (12) and a torsion spring, wherein the ratchet wheel (11) is connected with the upper end of the scroll assembly (100) and can rotate along with the rotation of the scroll assembly (100), the pawl (12) can swing between a position meshed with the ratchet wheel (11) and a position far away from the ratchet wheel, the torsion spring exerts elastic force on the pawl (12) to swing towards the meshing direction of the ratchet wheel (11), and the pawl (12) can limit the ratchet wheel (11) to pivot towards the direction of the unfolding curtain body (200) when meshed with the ratchet wheel (11);

the upper fixing seat (300) is movably provided with an unlocking piece (21) and a driving piece (22) respectively, the unlocking piece (21) can move between positions where the pawl (12) is pushed to be far away from the ratchet wheel (11) and the pawl (12) is pulled back, the driving piece (22) can move between positions where the unlocking piece (21) is pushed to be far away from the unlocking piece (21) and the unlocking piece (21) is contacted with the unlocking piece (21) in a descending mode and forces the unlocking piece (21) to move forward to unlock the ratchet wheel (11), and a first top spring (23) is further arranged, and the first top spring (23) is used for applying elastic force to the unlocking piece (21) to move in a direction far away from the pawl (12).

2. The novel telescoping door rail of claim 1, wherein: the upper fixing seat (300) is provided with a pressing assembly, and the pressing assembly comprises a driving piece (22), an annular mounting ring (24), a second top spring (25) and a pressing piece (26);

the mounting ring (24) is fixedly connected with the upper fixing seat (300), a plurality of first vertical long-strip-shaped wedge strips (241) are arranged at intervals along the inner side wall of the mounting ring (24), long-strip-shaped guide grooves (242) are formed between two adjacent first wedge strips (241), a second vertical long-strip-shaped wedge strip (243) is arranged in one guide groove (242) of the two adjacent guide grooves (242), and the second wedge strip (243) is shorter than the first wedge strip (241);

a third wedge strip (221) which can be inserted into the guide groove (242) is vertically arranged at the position of the driving piece (22) corresponding to the guide groove (242), the lower end wall of the first wedge strip (241), the lower end wall of the second wedge strip (243) and the upper end wall of the third wedge strip (221) are inclined planes, and the inclined direction of the inclined plane of the third wedge strip (221) is opposite to the inclined directions of the inclined planes of the first wedge strip (241) and the second wedge strip (243);

the pressing piece (26) is matched with the inner side of the mounting ring (24), the bottom wall of the pressing piece stretches into the inner side of the mounting ring (24) and then abuts against the third wedge strip (221), a clamping block (261) is arranged at the position, corresponding to the second wedge strip (243), of the outer side wall of the pressing piece (26), the clamping block (261) can stretch into the guide groove (242) and is opposite to the second wedge strip (243) so as to limit the pressing piece (26) to be separated from the mounting ring (24), the bottom wall of the pressing piece (26) is an annular tooth surface (262), one part of the inclined surface of the third wedge strip (221) is positioned in the guide groove (242), and the other part of the inclined surface abuts against the tooth surface (262);

the second top spring (25) is located below the driving piece (22) and is used for applying elastic force to the driving piece (22) and moving towards the direction of the third wedge strip (221) inserted into the guide groove (242).

3. The novel telescoping door rail of claim 2, wherein: the position inside the upper fixing seat (300) corresponding to the position between the driving piece (22) and the ratchet wheel (11) is fixedly provided with a supporting piece (27), the supporting piece (27) is provided with a vertical connecting shaft (271), the driving piece (22) and the second top spring (25) are movably sleeved on the connecting shaft (271), one end of the second top spring (25) is connected with the supporting piece (27), and the other end of the second top spring is elastically propped against the bottom wall of the driving piece (22).

4. The novel telescoping door rail of claim 2, wherein: still be equipped with knob (28), go up fixing base (300) top and be equipped with and be used for the holding tank (500) of knob (28), the diapire of holding tank (500) is equipped with installation collar (24), installation collar (24) inboard and holding tank (500) intercommunication, the position that corresponds casting die (26) in knob (28) bottom is equipped with banding connecting portion (281), through screw locking behind the top of connecting portion (281) local embedding casting die, be equipped with a plurality of locating holes (501) that enclose installation collar (24) wherein in holding tank (500) diapire annular interval, the position that corresponds locating hole (501) in knob (28) bottom downwardly extending has reference column (282), knob (28) can be rotated between the position that makes reference column (282) and locating hole (501) align and stagger relative casting die (26).

5. The novel telescoping door rail of claim 4, wherein: the bottom wall of the accommodating groove (500) is further penetrated with a strip-shaped guide hole (502) communicated with the inside of the upper fixing seat (300), a guide column (283) capable of extending into the guide hole (502) is arranged at the bottom of the knob (28), the guide column (283) can swing in the range of the guide hole (502) along with the rotation of the knob (28), a tension spring (503) connected with the guide column (283) is further arranged in the upper fixing seat (300), and the tension spring (503) applies a pulling force for moving in the direction staggered with the positioning hole (501) to the positioning column (282) through the guide column (283).

6. The novel telescoping door rail of claim 1, wherein: the locking piece (3) with the clamping teeth (31) is pivotally arranged on one side, away from the ratchet wheel (11), of the upper fixing seat (300) corresponding to the pawl (12), a clamping groove is formed in one side, close to the locking piece (3), of the pawl (12), the locking piece (3) can swing between the position, where the clamping teeth (31) are clamped into the clamping groove and the position, away from the pawl (12), of the pawl (3), a third top spring (30) is further arranged, and the locking piece (3) is applied to the elastic force, which swings towards the clamping groove direction, of the clamping teeth (31), through the third top spring (30), and the pawl (12) can be locked after the clamping teeth (31) are clamped into the clamping groove.

7. The novel telescoping door rail of claim 6, wherein: the top wall of the pawl (12) and the top wall of the locking piece (3) are respectively provided with a first forcing part (121) and a second forcing part (32) in an upward extending mode, the unlocking piece (21) is respectively provided with a first pushing part (211) and a second pushing part (212), and the first forcing part (121) and the second forcing part (32) are respectively pushed by the first pushing part (211) and the second pushing part (212) in the advancing movement process of the unlocking piece (21) so as to unlock the pawl (12) and the ratchet wheel (11) simultaneously.

8. The novel telescoping door rail of claim 4, wherein: the upper fixing seat (300) comprises an upper cover (301) and a base (302), the upper cover (301) and the base (302) are detachably connected and fixed through a buckle structure or are detachably locked through screws to form an accommodating space for accommodating the locking mechanism, and the knob (28) is located on the outer side of the upper cover (301).

9. The novel telescoping door rail of claim 1, wherein: the upper fixing seat (300) and the matching surface of the position to be installed are detachably provided with a connecting piece (4) which is fixedly connected with the position to be installed, the connecting piece (4) is integrally in a plate-shaped structure, an extending part (41) is outwards extended from the upper side, the left side and the right side of the connecting piece (4), a stepped shape is formed between the connecting piece (4) and the extending part (41), the upper fixing seat (300) is provided with a mounting groove (303) with a bottom opening, one side of the mounting groove (303) close to the position to be installed is provided with a local opening, and the connecting piece (4) can be vertically inserted into the mounting groove (303) through the bottom opening of the mounting groove (303) so that the extending part (41) is horizontally opposite to the inner wall of the mounting groove (303) to limit the connecting piece (4) from being separated from the mounting groove (303) in the horizontal direction;

still be equipped with locking piece (5) and fourth top spring (6), locking piece (5) movable mounting is in last fixing base (300), and locking piece (5) are equipped with drive portion (51) and locking portion (52), one side that connecting piece (4) are close to locking piece (5) is equipped with can supply locking portion (52) horizontal male lockhole (42), can restrict connecting piece (4) follow vertical direction to break away from mounting groove (303) when locking portion (52) are located lockhole (42), fourth top spring (6) one end and the inboard fixed connection of last fixing base (300), the other end offsets with locking piece (5) elasticity for apply the elasticity of inserting lockhole (42) direction motion to locking piece (5), drive portion (51) vertically pass the diapire of last fixing base (300) and expose outside, accessible external force drives driving piece (22) and breaks away from the direction motion of lockhole (42) towards locking portion (52).

10. A novel retractable door rail according to any one of claims 1 to 9, wherein: the unlocking piece (21) is in a strip-shaped structure, one end, close to the driving piece (22), of the unlocking piece (21) extends downwards in an inclined mode to form a guide part (213) with an inclined plane, and the edge of the driving piece (22) can force the unlocking piece (21) to move forwards through the inclined plane in the descending process.

11. A novel retractable door rail according to any one of claims 1 to 9, wherein: the top wall of the unlocking piece (21) is provided with a first mark (214) and a second mark (215) in a front-back adjacent mode, the upper fixing seat (300) is provided with an observation window (304) communicated with the inside of the upper fixing seat (300), when the ratchet wheel (11) is locked, the first mark (214) is aligned with the observation window (304), and when the ratchet wheel (11) is unlocked, the second mark (215) is aligned with the observation window (304).