CN218298752U - Adjusting mechanism for telescopic support of ground lifting curtain, telescopic support and ground lifting curtain - Google Patents

Abstract

The utility model discloses an adjusting mechanism for a flexible support of a ground lifting curtain, a flexible support and a ground lifting curtain, wherein the adjusting mechanism for the flexible support of the ground lifting curtain comprises a first chute arranged on a first rod body of the flexible support, which is not connected with an elastic part, and the first chute is arranged along the flexible direction of the elastic part; the first sliding unit is matched in the first sliding groove and connected with one end of the elastic piece; and the first moving unit is arranged on the first rod body of the telescopic bracket and has a locking function, and the first moving unit can move along the telescopic direction of the elastic piece so as to drive the first sliding unit to move under the action of the first moving unit and the elastic piece. Therefore, the position of the first sliding unit can be adjusted in a mode that the first moving unit resists the elastic force of the elastic piece, so that the elastic deformation amount of the elastic piece in a stretching or compressing state is adjusted, and the elastic force exerted on the telescopic bracket by the elastic piece is further adjusted.

Description

Adjusting mechanism for telescopic support of ground lifting curtain, telescopic support and ground lifting curtain

Technical Field

The utility model relates to a flexible curtain technical field, concretely relates to an adjustment mechanism and telescopic bracket and ground lift curtain for ground lift curtain telescopic bracket.

Background

The flexible curtain is as a kind of projection curtain, except can acting as the screen when the cooperation projector uses, can also be convenient for accomodate in shrink when not using to reduce the hindrance to other article, improve the utilization efficiency in space.

In recent years, with the improvement of living standard of people, the ground rises curtain has gradually replaced the curtain that hangs with its advantages such as convenient installation and regulation, the applicable scene is many, becomes one of people's preferred flexible curtain. Currently, the ground lifting curtain in the market mainly includes a hand pulling type and an electric type, wherein the electric type ground lifting curtain is the main type of the ground lifting curtain due to the convenience of operation.

The conventional realization form of the electric ground lifting curtain mainly comprises the steps that a telescopic rod is connected to a base, a telescopic curtain is connected to the telescopic rod, the telescopic curtain is driven to stretch through the stretching of the telescopic rod, specifically, a motor and an accommodating rod can be arranged on the base, and the telescopic curtain is retracted through the rotating direction of the motor driven accommodating rod; simultaneously, be connected with elastic component (for example spring) on the telescopic link, when accomodating the pole and accomodate flexible curtain, the telescopic link is in the contraction state, elastic component on the telescopic link is in tensile state or compression state, when motor drive accomodates the pole release and accomodates the flexible curtain above that, because not receive the resistance effect that motor drive accomodates the pole and accomodate flexible curtain, elastic component on the telescopic link changes from tensile state or compression state to initial state, change to the expansion state from the contraction state in order to drive the telescopic link, the telescopic link that is in the expansion state supports the flexible curtain of release, make it keep the exhibition, the state of stretching out.

However, since the extension of the telescopic rod is realized by the elastic force of the elastic member, when the elastic force applied to the telescopic rod is inappropriate, the telescopic rod may not be fully extended due to the small elastic force, so that the telescopic curtain cannot be smoothly extended; it may also cause the telescopic rod to deform after being unfolded due to the large elastic force, so that the telescopic curtain still cannot be unfolded smoothly.

SUMMERY OF THE UTILITY MODEL

In order to solve the telescopic link because of the elasticity of the elastic component of setting on it is unsuitable, and lead to the telescopic link can't expand totally or expand the back and take place to warp, finally lead to the unable problem of leveling the expansion of flexible curtain, according to the utility model discloses an aspect provides an adjustment mechanism for ground rises curtain telescopic bracket.

The adjusting mechanism for the ground lifting curtain telescopic support comprises a first sliding groove arranged on a first rod body of the telescopic support, which is not connected with an elastic part, and the first sliding groove is arranged along the telescopic direction of the elastic part; the first sliding unit is matched in the first sliding groove and connected with one end of the elastic piece; and the first moving unit is arranged on the first rod body of the telescopic support and has a locking function, and the first moving unit can move along the telescopic direction of the elastic piece so as to drive the first sliding unit to move under the action of the first moving unit and the elastic piece.

During the use, the other end of elastic component is connected on other body of rods of telescopic bracket to drive the motion of other relative first body of rods of body of rod through the elastic component and finally realize telescopic bracket's extension (or expansion), wherein, telescopic bracket is including the support that can extend and contract, also including the support that can expand and draw in. The utility model discloses a connect the elastic component on the first slip unit with first spout adaptation, and simultaneously, set up the flexible direction of elastic component along first spout, and set first mobile unit and the elastic component that will have the locking function, first slip unit can move under arbitrary person's in the two drive, can adjust the position of first slip unit with the mode through the elasticity of first mobile unit confrontation elastic component, elastic deformation volume when being in tensile or compression state with the adjustment elastic component, and then the elasticity of adjustment elastic component application on telescopic bracket.

In some embodiments, the first moving unit includes a screw structure provided on the first rod; and a first nut adapted to the threaded structure; the first nut abuts on a side of the first sliding unit facing the elastic member. Therefore, the first nut can be locked while the first nut is moved by rotating the first nut relative to the threaded structure, the position of the first sliding unit can be adjusted by rotating the first nut, and the operation is convenient and fast.

In some embodiments, the thread formation is an external thread provided on an outer diameter of the first rod; the first nut is sleeved on the outer side of the first rod body. Because the first nut is sleeved on the outer side of the first rod body, an operator can conveniently rotate the first nut.

In some embodiments, the first moving unit includes a first screw provided on the first rod; a second screw rod arranged on the first sliding unit; and a second nut adapted to the first screw and the second screw; wherein, the screw thread of first screw rod and second screw rod sets up along the flexible direction of elastic component. Therefore, the second nut can be locked while the second nut is moved by rotating the second nut relative to the first screw and the second screw, so that the position of the first sliding unit can be adjusted by rotating the second nut, and the operation is convenient.

In some embodiments, the first sliding groove is a through groove for penetrating the first rod body; the first sliding unit comprises a screw matched with the through groove and a third nut matched with the screw; the first moving unit abuts on the head of the screw and a side of the third nut facing the elastic member, or the first moving unit is attached to both ends of the screw. Therefore, the first sliding unit can be prevented from falling off the first sliding chute; moreover, because both ends of the first sliding unit are abutted against or connected to the first moving unit, the first sliding unit can be prevented from swinging relative to the first sliding groove due to uneven stress.

According to an aspect of the utility model, a telescopic bracket is provided, this telescopic bracket includes the aforesaid is used for rising curtain telescopic bracket's adjustment mechanism. From this, can adjust the size of applying the elasticity on telescopic bracket through guiding mechanism to guarantee that telescopic bracket stretches out and expands under the effect of suitable elasticity, avoid telescopic bracket to appear the condition of warping because of the elasticity that receives is too big.

In some embodiments, the telescoping support further comprises a first rod; a second lever pivotally connected to the first lever about a first pivot axis; and an elastic member having one end connected to the first sliding unit of the adjusting mechanism; the other end of the elastic piece is fixedly arranged relative to the second rod body; the first rod body is provided with a first accommodating cavity for accommodating the elastic piece; the elastic piece and the adjusting mechanism are arranged in a way that when the telescopic bracket is in a contraction state, the elastic piece is in a stretching state or in a compression state; when the telescopic bracket is in an expansion state, the elastic piece is in an initial state, or in a state between a stretching state and the initial state, or in a state between a compression state and the initial state.

Therefore, when the telescopic bracket in the contraction state is not acted by external force, the second rod body can rotate around the first pivot shaft relative to the first rod body under the action of the elastic force of the elastic part, so that the telescopic bracket is converted into the expansion state.

In some embodiments, the telescopic bracket further comprises a non-elastic cord, and the end of the elastic member, to which the first sliding unit is not connected, is connected to the second rod body through the non-elastic cord. So as to fix the elastic piece relative to the second rod body under the condition of not increasing the occupied space of the telescopic bracket.

According to an aspect of the utility model, a ground lift curtain is provided, should rise the curtain including at least one aforementioned telescopic bracket. In order when the flexible curtain of release, flexible curtain can expand under the elastic force effect of elastic component, moreover, because adjustment mechanism can adjust the size of elasticity, can guarantee that telescopic bracket expands to suitable size, avoids leading to the emergence of the unable phenomenon such as level expansion of flexible curtain because of telescopic bracket's the development degree is unsuitable.

In some embodiments, the floor screen further comprises a base, a cover, and a retractable screen; one of the first rod body and the second rod body of the telescopic bracket can be pivotally connected to the base around a second pivot shaft, the other one of the first rod body and the second rod body can be pivotally connected to the cover around a third pivot shaft, and the second pivot shaft and the third pivot shaft are parallel to the first pivot shaft between the first rod body and the second rod body; one end of the telescopic curtain is fixed relative to the base, and the other end of the telescopic curtain is fixed relative to the cover body.

Therefore, when the telescopic support is not subjected to external force, the second rod body can rotate relative to the first rod body under the action of the elastic piece, so that the telescopic support is in an expansion state, and the telescopic curtain can be in a flat expansion state under the support of the telescopic support.

In some embodiments, the first shaft is disposed below the second shaft.

In some embodiments, there are two telescopic supports, and the two telescopic supports are arranged such that when the telescopic supports are in the extended state, the included angles between the first rod body and the second rod body of the two telescopic supports, which are smaller than 180 °, are arranged away from each other. From this for when telescopic machanism is in the expansion state, two telescopic bracket can support the middle part region of flexible curtain to give flexible curtain better support.

Drawings

Fig. 1 is a schematic structural diagram of an adjusting mechanism for a telescopic support of a ground lifting curtain according to one embodiment of the present invention;

FIG. 2 is a schematic sectional view of the adjusting mechanism for the telescopic support of the ground curtain shown in FIG. 1;

fig. 3 is a schematic structural diagram of an adjusting mechanism for a telescopic support of a ground lifting curtain according to another embodiment of the present invention;

fig. 4 is a schematic structural view of a telescopic bracket according to one embodiment of the present invention;

FIG. 5 is a cross-sectional view of the telescoping support of FIG. 4;

fig. 6 is a schematic structural view of a telescopic bracket according to another embodiment of the present invention;

fig. 7 is a schematic structural view of a ground lifting curtain according to an embodiment of the present invention;

FIG. 8 is a schematic view, partially in section, of the ground screen of FIG. 7;

reference numerals: 20. a base; 21. a second chute; 30. a cover body; 31. a third chute; 40. a telescopic bracket; 41. a first rod body; 410. a first accommodating chamber; 411. a first chute; 412. a thread structure; 413. a first nut; 414. a first screw; 415. a second screw; 416. a second nut; 417. a sleeve; 42. a second rod body; 43. an elastic member; 44. a first sliding unit; 441. a screw; 442. a third nut; 45. a non-stretch cord; 60. a telescopic curtain.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" comprises 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element. The terms used herein are generally terms commonly used by those skilled in the art, and if they are inconsistent with such commonly used terms, the terms herein control.

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 1 to 3 schematically show an adjusting mechanism for a ground curtain telescopic bracket 40 according to at least one embodiment of the present invention.

As shown in fig. 1 to 3, the adjusting mechanism for the telescopic bracket 40 of the ground curtain comprises a first sliding slot 411 provided on the first rod 41 of the telescopic bracket 40 to which the elastic member 43 is not connected, a first sliding unit 44 fitted in the first sliding slot 411, and at least one first moving unit having a locking function provided on the first rod 41 of the telescopic bracket 40; wherein, the first sliding slot 411 is arranged along the extension direction of the elastic element 43; the first sliding unit 44 is connected to one end of the elastic member 43; the first moving unit is disposed to be movable in the extending and contracting direction of the elastic member 43 to move the first sliding unit 44 by the first moving unit and the elastic member 43.

For example, the elastic member 43 may be a spring structure such as a tension spring, a compression spring, a torsion spring, or an elastic member made of an elastic material such as TPU or polyurethane, or an elastic member made of an elastic material such as rubber.

Fig. 1 and 2 schematically show one embodiment of the adjusting mechanism for the telescopic support 40 of the ground curtain, in which the first moving unit includes a thread structure 412 provided on the first rod 41; and a first nut 413 fitted with the screw structure 412; the first nut 413 abuts against a side of the first sliding unit 44 facing the elastic member 43, so that the position of the first sliding unit 44 can be adjusted by rotating the first nut 413, and the operation is convenient. Illustratively, the thread structure 412 is an external thread provided on the outer diameter of the first rod 41; the first nut 413 is disposed on the outer side of the first shaft 41, so that the operator can rotate the first nut 413. For example, the thread structure 412 may be directly machined on the first rod 41, and for convenience of machining, a sleeve 417 may be sleeved on an outer diameter of the first rod 41, the sleeve 417 may be detachably connected to the first rod 41, and the thread structure 412 is machined on the outer diameter of the sleeve 417.

Fig. 3 schematically shows another embodiment of the adjusting mechanism for the telescopic ground curtain bracket 40, in which the first moving unit includes a first screw 414 provided on the first rod 41; a second screw 415 provided on the first sliding unit 44; and a second nut 416 fitted on the first screw 414 and the second screw 415; the threads of the first screw 414 and the second screw 415 are disposed along the extending direction of the elastic element 43, so that the position of the first sliding unit 44 can be adjusted by rotating the second nut 416, which is convenient to operate.

Use the utility model discloses a during an adjustment mechanism for ground rises curtain telescopic bracket 40, with the other end of elastic component 43 connect on telescopic bracket 40's other bodies of rod can. Adopt the utility model discloses an adjustment mechanism for ground rises curtain telescopic bracket 40 can adjust the position of first slip unit 44 through the mode of first mobile unit antagonism elastic force of elastic component 43 to the elastic deformation volume when adjusting elastic component 43 and being in tensile or compression state, and then the elasticity of adjustment elastic component 43 application on telescopic bracket 40, can't expand completely because of the elasticity of applying on it is too little with avoiding telescopic bracket 40, or because of the too big bending deformation of the elasticity of applying on it.

In order to prevent the first sliding unit 44 fitted in the first sliding groove 411 from sliding off the first sliding groove 411, as a preferred embodiment, the cross section of the first sliding groove 411 is configured to have a groove or a rib, and the first sliding unit 44 is a sliding block adapted to the shape of the first sliding groove 411, so that the sliding block can be prevented from rotating relative to the first sliding groove 411, and can be prevented from sliding off the first sliding groove 411. As another preferred embodiment, as shown in fig. 1 to 3, the first sliding slot 411 is a through slot through which the first rod 41 passes; the first sliding unit 44 comprises a sliding block matched with the through groove and limiting blocks connected to two ends of the sliding block and positioned outside the through groove, and the size of each limiting block is larger than that of the through groove so as to prevent the sliding block from moving out of the through groove; preferably, the slider connected with the limiting block can be realized as follows: the sliding block is a screw 441 matched with the through groove, the limiting block is a third nut 442 matched with the screw 441, and the screw 441 penetrates through the through groove and then is in threaded connection with the third nut 442 so as to prevent the screw 441 from sliding off the sliding groove; more preferably, when the adjustment mechanism for the telescopic support 40 of the ground curtain of the first embodiment is adopted, as shown in fig. 1 and 2, the first nut 413 abuts against the head of the screw 441 and the side of the third nut 442 facing the elastic member 43; when the adjusting mechanism for the telescopic support 40 of the ground curtain according to the second embodiment is adopted, as shown in fig. 3, the second screw 415 is connected to two ends of the screw 441, that is, two sets of the first screw 414, the second screw 415 and the second nut 416 are provided, the two sets of the first screw 414 are respectively connected to two opposite sides of the first rod 41, the two sets of the second screw 415 are respectively connected to two ends of the slider penetrating through the through slot, and the first screw 414 and the second screw 415 on the same side are connected through a second nut 416 by screw threads. Thereby, the first sliding unit 44 can be prevented from falling off the first chute 411; moreover, since both ends of the first sliding unit 44 abut against or are connected to the first moving unit, the first sliding unit 44 can be prevented from swinging relative to the first sliding slot 411 due to uneven force.

Fig. 4 to 6 schematically show a telescopic bracket 40 according to an embodiment of the present invention.

As shown in fig. 4 to 6, the telescopic bracket 40 includes the aforementioned adjusting mechanism for the telescopic ground curtain bracket 40. Therefore, the size of the elastic force applied to the telescopic bracket 40 can be adjusted through the adjusting mechanism, so that the telescopic bracket 40 is ensured to stretch and expand under the action of proper elastic force, and the situation that the telescopic bracket 40 deforms due to overlarge elastic force is avoided.

As an embodiment of the telescopic bracket 40, as shown in fig. 4 to 6, the telescopic bracket 40 further includes a first rod 41, a second rod 42 and an elastic member 43; wherein, the second rod 42 is pivotally connected to the first rod 41 around a first pivot axis; one end of the elastic element 43 is connected to the first sliding unit 44 of the adjusting mechanism, and the other end of the elastic element 43 is fixedly arranged relative to the second rod 42; the first rod 41 is integrally formed or machined with a first accommodating cavity 410 for accommodating the elastic member 43, so that on one hand, the weight of the first rod 41 can be reduced, and on the other hand, the elastic member 43 can be prevented from influencing the adjustment of the first moving unit by an operator; the elastic member 43 and the adjusting mechanism are arranged such that, when the telescopic bracket 40 is in a contracted state, the elastic member 43 is in a stretched state or in a compressed state; when the telescopic bracket 40 is in the expanded state, the elastic member 43 is in the initial state, or in a state between the stretched state and the initial state, or in a state between the compressed state and the initial state, that is, when the telescopic bracket 40 is in the contracted state, the elastic member 43 is in the stretched state, and when the telescopic bracket 40 is in the expanded state, the elastic force of the elastic member 43 is released, so that the elastic member 43 is in the initial state or in a state between the stretched state and the initial state; alternatively, when the telescopic bracket 40 is in the contracted state, the elastic member 43 is in the compressed state, and when the telescopic bracket 40 is in the expanded state, the elastic force of the elastic member 43 is released, so that the elastic member 43 is in the initial state or in a state between the compressed state and the initial state. Therefore, when the telescopic bracket 40 in the contracted state is not acted by external force, the second rod 42 can rotate around the first pivot shaft relative to the first rod 41 under the elastic force of the elastic member 43 therein, so that the telescopic bracket 40 is converted to the expanded state.

As one embodiment, as shown in fig. 5, the telescopic bracket 40 further includes a non-elastic cord 45, and an end of the elastic member 43, to which the first sliding unit 44 is not connected, is connected to the second rod 42 through the non-elastic cord 45. So as to fix the elastic member 43 relative to the second rod 42 without increasing the occupied space of the telescopic bracket 40.

Fig. 7 and 8 schematically show a ground lift curtain according to an embodiment of the present invention.

As shown in fig. 7 and 8, the floor screen includes at least one of the aforementioned adjustment mechanisms or telescoping legs 40 for the telescoping legs 40 of the floor screen. In order when the flexible curtain 60 of release, flexible curtain 60 can expand under the spring action of elastic component 43, moreover, because adjustment mechanism can adjust the size of elasticity, can guarantee that telescopic bracket 40 expandes to suitable size, avoids leading to the emergence of phenomenons such as flexible curtain 60 can not level and expand because of telescopic bracket 40's the unsuitable degree of expansion.

As one of the embodiments of the floor-elevating screen, as shown in fig. 7 and 8, the floor-elevating screen further includes a base 20, a cover 30, and a telescopic screen 60; one of the first rod 41 and the second rod 42 of the telescopic bracket 40 can be pivotally connected to the base 20 around a second pivot shaft, and the other can be pivotally connected to the cover 30 around a third pivot shaft, and the second pivot shaft and the third pivot shaft are parallel to the first pivot shaft between the first rod 41 and the second rod 42; one end of the retractable screen 60 is fixed with respect to the base 20, and the other end is fixed with respect to the cover 30. Generally, the base 20 is further connected with a driving device, the driving device is connected with a rotating shaft for accommodating the retractable curtain 60, the retractable curtain 60 is wound and released on the rotating shaft by the rotation of the rotating shaft driven by the driving device, the base 20 is provided with an accommodating cavity for accommodating the rotating shaft, the retractable curtain 60 and the retractable bracket 40, and when the driving device releases the retractable curtain 60, the retractable bracket 40 is extended under the elastic force of the elastic member 43 to drive the retractable curtain 60 to extend; when the driving device winds the retractable curtain 60, the retractable curtain 60 applies pressure to the retractable bracket 40 to make the elastic member 43 elastically deform, and the retractable bracket 40 contracts when receiving external force until the retractable curtain 60 and the retractable bracket 40 are accommodated in the accommodating cavity of the base 20, and then the retractable curtain 60 drives the cover body 30 to cover the opening of the accommodating cavity of the base 20.

As one of preferred embodiments, as shown in fig. 7 and 8, the first rod 41 is disposed below the second rod 42 to lower the center of gravity of the telescopic bracket 40 and ensure the stability of the telescopic bracket 40.

Preferably, as shown in fig. 7 and 8, there are two telescopic brackets 40, and the two telescopic brackets 40 are arranged such that when the telescopic brackets 40 are in the unfolded state, an included angle of less than 180 ° exists between the first rod 41 and the second rod 42 of the telescopic brackets 40, and the included angles of less than 180 ° of the two telescopic brackets 40 are arranged away from each other. Thereby, the two telescopic brackets 40 are enabled to support the middle region of the telescopic screen 60 when the telescopic mechanism is in the deployed state to give the telescopic screen 60 better support.

In the present invention, the connection or installation is a fixed connection without particular emphasis. The fixed connection may be realized as a detachable connection or a non-detachable connection as is commonly used in the art. The detachable connection can be realized by the prior art, such as a threaded connection or a key connection. The non-detachable connection can also be realized by using the prior art, such as welding or gluing.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims (10)

1. A adjustment mechanism for ground lift curtain telescopic bracket, its characterized in that includes:

the first sliding groove (411) is formed in the first rod body (41) of the telescopic bracket (40) which is not connected with the elastic part (43), and the first sliding groove (411) is formed in the telescopic direction of the elastic part (43);

a first sliding unit (44) fitted in the first sliding groove (411), the first sliding unit (44) being connected to one end of an elastic member (43);

and the first moving unit is arranged on a first rod body (41) of the telescopic bracket (40) and has a locking function, and the first moving unit can move along the telescopic direction of the elastic piece (43) so as to drive the first sliding unit (44) to move under the action of the first moving unit and the elastic piece (43).

2. The adjusting mechanism for a telescopic support for a ground curtain as claimed in claim 1, wherein the first moving unit comprises:

a thread structure (412) arranged on the first rod body (41);

and a first nut (413) adapted to the threaded structure (412);

the first nut (413) rests on the side of the first sliding unit (44) facing the elastic element (43).

3. The adjusting mechanism for a telescopic support for a ground curtain as claimed in claim 2, characterized in that said threaded structure (412) is an external thread provided on the outer diameter of said first rod (41);

the first nut (413) is sleeved on the outer side of the first rod body (41).

4. The adjusting mechanism for a telescopic support for a ground curtain as claimed in claim 1, wherein the first moving unit comprises:

a first screw (414) provided on the first rod (41);

a second screw (415) provided on the first sliding unit (44);

and a second nut (416) fitted over the first screw (414) and the second screw (415); wherein the content of the first and second substances,

the threads of the first screw (414) and the second screw (415) are arranged along the expansion direction of the elastic member (43).

5. The adjusting mechanism for a telescopic support of a ground lifting curtain as claimed in any one of claims 1 to 4, wherein the first sliding slot (411) is a through slot through which the first rod (41) passes;

the first sliding unit (44) includes a screw (441) fitted to the through groove and a third nut (442) fitted to the screw (441);

the first moving unit abuts on the head of the screw (441) and a side of the third nut (442) facing the elastic member (43), or the first moving unit is attached to both ends of the screw (441).

6. Telescopic support, characterized in that it comprises an adjustment mechanism for a telescopic screen support (40) according to any one of claims 1 to 5.

7. The telescoping stand of claim 6, further comprising:

a first rod (41);

a second lever (42) pivotally connected to the first lever (41) about a first pivot axis;

and an elastic member (43) having one end connected to a first sliding unit (44) of the adjusting mechanism; wherein the content of the first and second substances,

the other end of the elastic piece (43) is fixedly arranged relative to the second rod body (42);

the first rod body (41) is provided with a first accommodating cavity (410) for accommodating the elastic piece (43);

the elastic member (43) and the adjusting mechanism are arranged in such a way that when the telescopic bracket (40) is in a contracted state, the elastic member (43) is in a stretched state or in a compressed state; when the telescopic bracket (40) is in the expansion state, the elastic piece (43) is in the initial state, or in a state between the stretching state and the initial state, or in a state between the compression state and the initial state.

8. The telescopic bracket according to claim 7, further comprising a non-elastic cord (45), wherein an end of the elastic member (43) to which the first sliding unit (44) is not connected is connected to the second rod body (42) through the non-elastic cord (45).

9. Ground curtain, characterized in that it comprises at least one telescopic support (40) according to any one of claims 6 to 8.

10. The screen of claim 9, further comprising a base (20), a cover (30), and a telescoping screen (60); wherein the content of the first and second substances,

one of the first rod body (41) and the second rod body (42) of the telescopic bracket (40) can be pivotally connected to the base (20) around a second pivot shaft, the other can be pivotally connected to the cover body (30) around a third pivot shaft, and the second pivot shaft and the third pivot shaft are parallel to the first pivot shaft between the first rod body (41) and the second rod body (42);

one end of the telescopic curtain (60) is fixed relative to the base (20), and the other end of the telescopic curtain is fixed relative to the cover body (30);

the first rod body (41) is arranged below the second rod body (42);

the telescopic supports (40) are two, and the two telescopic supports (40) are arranged in such a way that when the telescopic supports (40) are in an unfolded state, included angles smaller than 180 degrees between the first rod body (41) and the second rod body (42) of the two telescopic supports (40) are arranged oppositely.

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