CN220748092U - Buffer with adjustable lower limit - Google Patents

Abstract

The utility model relates to an adjustable lower limit buffer, which comprises a fixed sleeve, a tightening spring, an adjusting ring, a sleeve seat and a lower limit seat; the adjusting ring pushes the two ends of the tightening spring in opposite directions by applying an external force, so that the tightening spring is elastically loosened and is not tightened on the outer edge of the fixed sleeve, and then the end can sequentially push the sleeve seat and the lower limit seat to rotate, so that the inner tube of a roller shutter axially moves relative to the lower limit seat, and the distance between the lower limit seat on a threaded section of the inner tube and the upper limit seat can be adjusted, so that the effect of adjusting the lower limit of the roller shutter is achieved.

Description

Buffer with adjustable lower limit

Technical Field

The utility model relates to a rolling shutter component, in particular to an adjustable lower limit buffer for a rolling shutter without disassembly.

Background

At present, a common rolling curtain is provided with a buffer which is limited up and down so as to prevent the rolling curtain from exceeding the up and down positions of a window when being rolled up or unrolled down. The structure of the upper and lower limit buffer of the common rolling curtain is as the novel M605068 'rolling curtain and buffer thereof' patent which can be provided with upper and lower limit and is announced by Taiwan of China, 12 months and 11 days in 2020. The method is as follows: comprises an inner tube, a first sliding seat, a first limit seat and a second limit seat. When a curtain is drooped by a linkage component, the linkage component drives the first sliding seat to push against the first limiting seat, so that the linkage component stops drooping the curtain; when the curtain cloth is pulled up by the linkage component, the linkage component drives the first sliding seat to push against the second limiting seat, so that the linkage component stops pulling up the curtain cloth. By means of the first limiting seat and the second limiting seat, the curtain cloth can be limited no matter the curtain cloth is to be lowered or lifted, and the curtain cloth is not required to be damaged due to excessive lowering or lifting.

In the structure of the vertical limit buffer in the prior art, when the vertical limit buffer is adjusted, the outer tube of the connecting curtain cloth needs to be disassembled for adjustment, so that the situation that the position of the lower limit is not right after the rolling curtain is installed on the wall of the window is often detected, the rolling curtain of the whole group needs to be disassembled again for adjustment, the construction adjustment is quite troublesome, the labor hour is consumed, and the use is quite unsatisfactory.

Disclosure of Invention

Accordingly, the conventional structure for adjusting the lower limit of the damper of the roller shutter has the above drawbacks. Therefore, the present utility model provides a buffer with adjustable lower limit without disassembly, which is assembled on a roller shutter in a matching way, comprising:

a fixed sleeve sleeved on a shaft rod of the roller blind and not rotating relatively; at least one tightening spring axially tightening the outer edge of the fixed sleeve, wherein the tightening spring is provided with two end parts, and the two end parts are pushed in opposite directions by an external force to elastically loosen the tightening spring and not tightening the outer edge of the fixed sleeve; the adjusting ring is sleeved on the outer edge of the binding spring, the adjusting ring is provided with a slot, two side edges of the slot respectively form a pushing part, two end parts are positioned between the two pushing parts, and when the adjusting ring rotates, any pushing part generates the external force so as to push the corresponding end part; the sleeve seat is sleeved on the outer edge of the adjusting ring, a pushing block is convexly arranged on the sleeve seat, the pushing block stretches into the groove and is positioned between two end parts, and when any one of the end parts is pushed by the pushing part, the end part pushes the pushing block to enable the sleeve seat to rotate; the lower limit seat is screwed on an inner tube of the roller shutter and rotates in linkage with the sleeve seat through a transmission spring, so that the inner tube moves axially relative to the lower limit seat.

The section of the shaft rod is non-circular, one end of the fixed sleeve is axially provided with a first shaft hole with the same section shape as the shaft rod, and the first shaft hole is movably sleeved on the shaft rod.

The adjusting ring is axially provided with a second shaft hole which is axially sleeved on the outer edge of the tightening spring.

One end of the adjusting ring is provided with a rotating part.

An elastic element is arranged between the sleeve seat and the rotating part.

The sleeve seat is axially provided with a third shaft hole which is axially sleeved on the outer edge of the adjusting ring.

The pushing block is axially and convexly arranged on the inner wall edge of the third shaft hole.

The outer edge of the sleeve seat is sleeved with a protecting cover.

The lower limit seat is screwed on a thread section of the inner pipe and comprises a first seat body and a second seat body which are connected with each other, a first end of the transmission spring is connected with the sleeve seat, a second end of the transmission spring is connected with the first seat body, and the sleeve seat is linked with the first seat body to rotate by the transmission spring.

The first seat body is axially provided with a fourth shaft hole, the fourth shaft hole is axially sleeved on the outer edge of the shaft rod, the inner wall edge at one end of the fourth shaft hole is axially provided with a connecting part in a protruding mode, the second seat body is axially provided with a fifth shaft hole, one end of the fifth shaft hole is axially provided with a connecting groove, the connecting part is clamped in the connecting groove, the first seat body is enabled to drive the second seat body to rotate, the other end of the fifth shaft hole is axially provided with an inner thread part, the inner thread part is in threaded connection with the thread section, and the second seat body rotates to enable the thread section to axially move relative to the inner thread part.

The technical characteristics have the following advantages:

1. when the lower limit adjustment of the buffer is carried out, the adjustment can be carried out immediately without detaching the whole group of roller blinds on the wall or disassembling any component in the roller blinds.

2. Therefore, the method is quite simple and convenient in construction adjustment, can greatly save the labor hour and the labor force of assembly, and is particularly suitable for the installation adjustment of a large quantity of roller blinds.

3. When the rolling curtain is unfolded downwards, the rotating inertia generated by the rolling curtain is used for driving one end part of the tightening spring to be pushed by the push block to rotate and move reversely towards the other end part, so that the tightening spring can be tightened on the outer edge of the fixed sleeve more to counteract the rotating inertia, a braking effect is generated, and the rolling curtain is prevented from being unfolded downwards excessively.

Drawings

Fig. 1 is an exploded perspective view of an embodiment of the present utility model.

FIG. 2 is a schematic view showing the damper assembled on the roller shutter according to the embodiment of the present utility model.

FIG. 3 is an enlarged view of the damper assembled on the roller blind according to the embodiment of the present utility model.

Fig. 4 is a cross-sectional view showing the assembly of the damper to the roll screen according to the embodiment of the present utility model.

Fig. 5 is a combined cross-sectional view of a damper according to an embodiment of the present utility model.

Fig. 6 is a sectional view of VI-VI in fig. 4, which is an embodiment of the present utility model.

Fig. 7 is a schematic view illustrating a movement of the sliding seat against the upper limit seat according to an embodiment of the present utility model.

Fig. 8 is a schematic view illustrating a movement of the sliding seat against the lower limit seat according to an embodiment of the present utility model.

Fig. 9 is a schematic diagram showing the pushing portion rotating to push the end portion, and the end portion pushing the pushing block rotating.

Fig. 10 is a schematic view illustrating adjusting the distance between the lower limit seat and the upper limit seat on the threaded section according to an embodiment of the present utility model.

FIG. 11 is a schematic view showing the pushing block pushing the end portion to move reversely toward the other end portion to elastically tighten the tightening spring according to the embodiment of the present utility model.

Reference numerals illustrate: 1, fixing a sleeve; 11, a first shaft hole; 2, tightening the spring; an end portion 21; 3, adjusting the ring; 31, a second shaft hole; 32, grooving; 33, a pushing part; 34, a rotating part; 4, a sleeve seat; 41, a third shaft hole; 42, pushing blocks; 43 an elastic element; 44, protecting cover; 5, a lower limit seat; 51, a transmission spring; 511 a first end; 512 a second end; 52, a first seat body; 521, a fourth shaft hole; 522 a connection portion; 53, a second seat body; 531 a fifth shaft hole; 532, a connecting groove; 533 an internal thread portion; a, rolling curtain; a1, a shaft lever; a2, an inner tube; a21, a thread section; a3, an upper limit seat; a4, a sliding seat; a5, an outer tube; a6, curtain cloth.

Detailed Description

Referring to fig. 1, 2 and 3, an embodiment of the utility model is a buffer with adjustable lower limit for being assembled on a roller shutter a. The roller shutter A is provided with a shaft rod A1 with a non-circular cross section, an inner tube A2 is sleeved on the shaft rod A1, and the inner tube A2 can axially move on the shaft rod A1 and cannot rotate relative to the shaft rod A1. As shown in fig. 4, a thread section a21 is disposed on the outer edge of the inner tube A2, an upper limit seat A3 and a sliding seat A4 are screwed on the thread section a21, an outer tube A5 is sleeved on the outer edges of the upper limit seat A3 and the sliding seat A4, and the outer tube A5 is connected with a curtain A6. When the outer tube A5 drives the curtain A6 to roll up, the sliding seat A4 is linked to rotate towards the upper limit seat A3, as shown in fig. 7, the sliding seat A4 is abutted against the upper limit seat A3 to stop rolling up, so as to form upper limit.

Referring to fig. 1, 2 and 3, an embodiment of the present utility model includes: fixed sleeve 1, lacing spring 2, adjusting ring 3, sleeve seat 4 and lower spacing seat 5, wherein:

the fixed sleeve 1 is provided with a first shaft hole 11 with the same cross section shape as the shaft rod A1 at one end in the axial direction, and the caliber of the first shaft hole 11 is equal to the outer diameter of the shaft rod A1, so that the fixed sleeve 1 can be movably sleeved on the shaft rod A1 without relative rotation and can only axially move.

At least one tightening spring 2, as shown in fig. 5, is axially tightened on the outer edge of the fixed sleeve 1, and the embodiment of the utility model is provided with three tightening springs 2, which are sequentially tightened on the outer edge of the fixed sleeve 1. Two ends 21 are provided at two ends of the tightening spring 2, when an external force is applied to the two ends 21 to push them in opposite directions, the tightening spring 2 can be loosened elastically, and is not tightened on the outer edge of the fixing sleeve 1, and when the external force is eliminated, the tightening spring 2 is re-tightened on the outer edge of the fixing sleeve 1 by elastic restoring force.

The adjusting ring 3 is axially provided with a second shaft hole 31 for the adjusting ring 3 to axially sleeve the outer edge of the tightening spring 2. The adjusting ring 3 is axially provided with a rectangular slot 32, and two side edges of the slot 32 respectively form a pushing portion 33, as shown in fig. 6, so that the two end portions 21 of the tightening spring 2 are located between the two pushing portions 33, and when the adjusting ring 3 rotates (rotates in a forward direction or rotates in a reverse direction), any pushing portion 33 can generate the external force to push the corresponding end portion 21, so that the tightening spring 2 is elastically loosened and is not tightened on the outer edge of the fixed sleeve 1. One end of the adjusting ring 3 is provided with a rotating part 34.

The sleeve seat 4 is axially provided with a third shaft hole 41, so that the sleeve seat 4 can be axially sleeved on the outer edge of the adjusting ring 3. The inner wall edge of the third shaft hole 41 is axially protruding with a push block 42, as shown in fig. 6, the push block 42 extends into the slot 32 of the adjusting ring 3 and is located between the two ends 21 of the tightening spring 2, so that when any one of the ends 21 is pushed by the pushing portion 33, the end 21 can push the push block 42 to rotate (forward or reverse) the sleeve seat 4. An elastic element 43 is disposed between the sleeve seat 4 and the rotating portion 34 of the adjusting ring 3. And a protecting cover 44 is sleeved on the outer edge of the sleeve seat 4.

The lower limit seat 5 is screwed on the thread section A21 of the inner pipe A2. The lower limit seat 5 comprises a transmission spring 51, a first seat 52 and a second seat 53, wherein the transmission spring 51 is a torsion spring, a first end 511 of the transmission spring 51 is connected to the sleeve seat 4, a second end 512 of the transmission spring 51 is connected to the first seat 52, and the sleeve seat 4 can be linked to rotate (forward or reverse) the first seat 52 by the transmission spring 51. The first base 52 is axially provided with a fourth shaft hole 521, so that the first base 52 can be axially sleeved on the outer edge of the shaft A1, and a connecting portion 522 is axially protruding from an inner wall edge of one end of the fourth shaft hole 521. The second base 53 is axially provided with a fifth shaft hole 531, one end of the fifth shaft hole 531 is axially provided with a connecting slot 532, and the connecting portion 522 can be clamped into the connecting slot 532, so that the first base 52 can be linked to rotate (forward or reverse) the second base 53. The other end of the fifth shaft hole 531 is axially provided with an internal thread 533, and the internal thread 533 is screwed onto the thread section a21 of the inner tube A2, so that when the second seat 53 rotates (rotates), the thread section a21 can move axially relative to the internal thread 533 to adjust the relative position of the lower limit seat 5 on the thread section a21, and when the curtain A6 with a counterweight at the bottom drives the outer tube A5 to expand downwards, the sliding seat A4 can be linked to rotate towards the second seat 53 of the lower limit seat 5, and the second seat 53 is abutted by the sliding seat A4 to stop expanding downwards, so as to achieve the effect of limiting the lower limit of the roller shutter a, as shown in fig. 8.

In use, as shown in fig. 1, 2 and 3, the buffer is first pre-assembled on the roller blind a, and then the roller blind a is mounted and fixed on a window at a position above a wall, so that the roller blind a can be rolled or unrolled to cover the window. When the rolling shutter a starts to roll up, the outer tube A5 drives the curtain A6 to roll up by an automatic or manual mode, the outer tube A5 can drive the sliding seat A4 to rotate towards the upper limit seat A3 to axially approach, as shown in fig. 7, the sliding seat A4 axially abuts against the upper limit seat A3 to prevent further rotation, and then the rolling up is stopped, so as to achieve the effect of limiting the rolling shutter a. When the rolling shutter a starts to be unfolded downwards, the curtain A6 drives the outer tube A5 to be unfolded downwards by using the balancing weight in an automatic or manual mode, the outer tube A5 can drive the sliding seat A4 to rotate towards the lower limit seat 5 to axially approach, as shown in fig. 8, the sliding seat A4 is abutted against the second seat 53 of the lower limit seat 5 to prevent the sliding seat A4 from rotating any more, so that the downward unfolding is stopped and the lower limit effect of the rolling shutter a is achieved.

When the rolling shutter a needs to adjust the lower limit of the rolling shutter a, as shown in fig. 1, 2 and 4, the relative position of the lower limit seat 5 on the threaded section a21 of the inner tube A2 needs to be changed. First, the rotating portion 34 of the adjusting ring 3 is rotated, the rotation direction (forward rotation or reverse rotation) of the rotating portion 34 is mainly determined according to the rotation direction of the threaded connection between the internal threaded portion 533 and the threaded section a21, and then the distance between the lower limit seat 5 and the upper limit seat A3 on the threaded section a21 is controlled by rotating the rotating portion 34 forward or reverse rotation. When the rotating part 34 is rotated to rotate the adjusting ring 3 forward or backward, the pushing parts 33 at two side edges of the slot 32 of the adjusting ring 3 generate an external force, as shown in fig. 9, the external force can push one end 21 of the corresponding tightening spring 2 to move toward the other end 21, so that the tightening spring 2 can be elastically loosened and not tightened on the outer edge of the fixed sleeve 1 any more, and therefore, the tightening springs 2 can rotate on the outer edge of the fixed sleeve 1 after being loosened. When the tightening spring 2 rotates, the end 21 pushed by the external force can push the push block 42 in a proper direction, so that the sleeve seat 4 starts to rotate. When the sleeve seat 4 rotates, the first end 511 and the second end 512 of the transmission spring 51 can drive the first seat 52 to start rotating, when the first seat 52 rotates, the second seat 53 can be linked to start rotating (autorotation) through the clamping action of the connecting part 522 and the connecting groove 532, when the second seat 53 rotates, as the internal thread 533 of the fifth shaft hole 531 is screwed on the thread section a21 of the inner tube A2, when the second seat 53 rotates, as shown in fig. 10, the thread section a21 can axially move relative to the internal thread section 533, so that the relative position of the lower limit seat 5 on the thread section a21 can be adjusted, the distance between the lower limit seat 5 and the upper limit seat A3 can be prolonged or shortened, when the outer tube A6 drives the outer tube A5 to be unfolded downwards, the sliding seat A4 can be linked to rotate towards the second seat 53 of the lower limit seat 5, and the axial direction of the curtain can be adjusted to be close to the second seat 53 to the lower limit seat 4, so as to achieve the unfolding direction.

The buffer structure of the embodiment of the utility model can immediately adjust without re-detaching the whole group of the roller blind A on the wall of a window or disassembling any component in the roller blind A when the lower limit adjustment is carried out, thus being quite simple and convenient in construction adjustment, greatly saving labor hour and manpower and being particularly suitable for the installation adjustment of the roller blind in a large batch.

As shown in fig. 1 and 8, when the roller shutter a is unfolded downward, the sliding seat A4 is abutted against the second seat 53 of the lower limit seat 5, a rotational inertia is generated when the sliding seat A4 rotates, and the rotational inertia is transferred to the second seat 53 to rotate, and then the second seat 53 sequentially drives the first seat 52, the transmission spring 51 and the sleeve seat 4 to rotate, as shown in fig. 11, when the sleeve seat 4 rotates, the pushing block 42 rotationally pushes one end 21 of the corresponding tightening spring 2 to move reversely towards the other end 21, so that the tightening spring 2 is more tightly fastened on the outer edge of the fixed sleeve 1 to block the sleeve seat 4 from rotating, thereby counteracting the rotational inertia transferred by the sliding seat A4, and generating a braking effect to prevent the roller shutter a from being unfolded excessively downward.

While the operation, use and effectiveness of the present utility model will be fully understood from the foregoing description of the embodiments, the above-described embodiments are merely preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, i.e., the present utility model is capable of being modified or practiced in light of the appended claims and their descriptions.

Claims (10)

1. The utility model provides a buffer of adjustable lower spacing which characterized in that: it is assembled on a rolling screen in a matching way, and comprises:

a fixed sleeve sleeved on a shaft rod of the roller blind and not rotating relatively;

at least one tightening spring axially tightening the outer edge of the fixed sleeve, wherein the tightening spring is provided with two end parts, and the two end parts are pushed in opposite directions by an external force to elastically loosen the tightening spring and not tightening the outer edge of the fixed sleeve;

the adjusting ring is sleeved on the outer edge of the binding spring, the adjusting ring is provided with a slot, two side edges of the slot respectively form a pushing part, two end parts are positioned between the two pushing parts, and when the adjusting ring rotates, any pushing part generates the external force so as to push the corresponding end part;

the sleeve seat is sleeved on the outer edge of the adjusting ring, a pushing block is convexly arranged on the sleeve seat, the pushing block stretches into the groove and is positioned between two end parts, and when any one of the end parts is pushed by the pushing part, the end part pushes the pushing block to enable the sleeve seat to rotate;

the lower limit seat is screwed on an inner tube of the roller shutter and rotates in linkage with the sleeve seat through a transmission spring, so that the inner tube moves axially relative to the lower limit seat.

2. The adjustable down limit buffer of claim 1, wherein: the section of the shaft rod is non-circular, one end of the fixed sleeve is axially provided with a first shaft hole with the same section shape as the shaft rod, and the first shaft hole is movably sleeved on the shaft rod.

3. The adjustable down limit buffer of claim 1, wherein: the adjusting ring is axially provided with a second shaft hole which is axially sleeved on the outer edge of the tightening spring.

4. The adjustable down limit buffer of claim 1, wherein: one end of the adjusting ring is provided with a rotating part.

5. The adjustable lower limit buffer of claim 4, wherein: an elastic element is arranged between the sleeve seat and the rotating part.

6. The adjustable down limit buffer of claim 1, wherein: the sleeve seat is axially provided with a third shaft hole which is axially sleeved on the outer edge of the adjusting ring.

7. The adjustable lower limit buffer of claim 6, wherein: the pushing block is axially and convexly arranged on the inner wall edge of the third shaft hole.

8. The adjustable down limit buffer of claim 1, wherein: the outer edge of the sleeve seat is sleeved with a protecting cover.

9. The adjustable down limit buffer of claim 1, wherein: the lower limit seat is screwed on a thread section of the inner pipe and comprises a first seat body and a second seat body which are connected with each other, a first end of the transmission spring is connected with the sleeve seat, a second end of the transmission spring is connected with the first seat body, and the sleeve seat is linked with the first seat body to rotate by the transmission spring.

10. The adjustable lower limit buffer of claim 9, wherein: the first seat body is axially provided with a fourth shaft hole, the fourth shaft hole is axially sleeved on the outer edge of the shaft rod, the inner wall edge at one end of the fourth shaft hole is axially provided with a connecting part in a protruding mode, the second seat body is axially provided with a fifth shaft hole, one end of the fifth shaft hole is axially provided with a connecting groove, the connecting part is clamped in the connecting groove, the first seat body is enabled to drive the second seat body to rotate, the other end of the fifth shaft hole is axially provided with an inner thread part, the inner thread part is in threaded connection with the thread section, and the second seat body rotates to enable the thread section to axially move relative to the inner thread part.