CN2635880Y - One-way transmission device for lifting curtains and curtains using the same - Google Patents

Abstract

The utility model provides a one-way transmission device of lifting curtain, which is an upper transverse frame arranged on the curtain and comprises: a force input shaft which can be driven by a user to rotate; the output shaft is sleeved on a fixed shaft and connected with the input shaft to be driven to rotate; a transmission shaft which is sleeved on the output shaft and is jointed with the linkage rod of the curtain, and the inner peripheral surface of the transmission shaft is provided with a convex part which extends into the gap of the pipe wall of the output shaft; at least one spiral spring, each has two abutting parts projecting outward from the spiral part along the radial direction, the spring is wound around the fixed shaft and is positioned at the inner side of the output shaft, and the two abutting parts extend into the gap and are positioned at different sides of the convex part; the output shaft can push the spring and the transmission shaft to rotate along with the output shaft, so that the linkage rod drives the shielding component of the curtain to lift; when the transmission shaft is driven by the weight of the shielding component to rotate, the spring is forced to tighten and be blocked.

Description

One-way transmission device for lifting curtains and curtains using the same

technical field

The utility model is related to curtains, in particular to a shielding component (referring to blinds or curtains) that can be used in lifting curtains (such as venetian blinds or roller blinds, etc.), so that the driving force of the operator can be transmitted smoothly to drive the curtains. Curtains, etc.) extend downward or contract upward, but the downward weight of the shielding component does not return the one-way transmission device, and the lifting curtain using the transmission device.

Background technique

Most of the general lifting curtains use a bead chain or a drawstring hanging on the side of the curtain for the user to pull in a circle or pull it up and down, so as to control the downward extension or upward condensation of the shielding components (referring to the curtain leaves or curtains, etc.) ; But because the exposed drawstring of this type of curtain may be entangled with people and cause accidents, the industry is working hard to develop manual curtains without exposed drawcord recently.

One of the existing types of lifting curtains without exposed pull cords is to install a transmission device including an input shaft and an output shaft on the headrail of the curtain, wherein the input shaft can be directly controlled by the user and stay in place. Rotation (for example, a control rod extending downward from the input shaft for the user to rotate, or the user holds a control rod separated from the curtain and inserts the input shaft upwards to drive the rotation), the output shaft can be driven by the input shaft It is driven to rotate in situ, and the output shaft is coaxially engaged with a linkage rod pivoted on the upper horizontal frame. When the linkage rod rotates, it can drive the shade components of the curtains to extend downward or to condense upward, such as the French FR -2692002 patent case disclosed.

In order to enable the shade assembly to be positioned at the adjusted height, the above-mentioned curtain uses a complex stay cord winding method with a draw cord tension adjuster to prevent the shade assembly from sinking due to its own weight. However, this method is more complicated in assembly work. Trouble; there is another simple one-way transmission function, that is, the worm and worm gear that are fitted with each other are used as the aforementioned input shaft and output shaft; in theory, when the fitting angle of the worm and the worm wheel is within a certain range, it does have a one-way transmission function. The function of the transmission The worm can drive the worm gear with a small transmission force, but the worm gear must use a large transmission force to drive the worm; however, in practical applications, it is often due to the weight of the curtain covering component is too heavy, or the force is applied due to the size of the component The upper limit is insufficient, and the torsion check effect of the aforementioned worm and worm gear mechanism is not reliable enough. As a result, the shielding component of the curtain cannot be positioned immediately after height adjustment and will sink slightly, or the positioning is not stable enough and it will sink when it is bumped. Further improvement is needed .

Utility model content

The main purpose of this utility model is to provide a one-way transmission device for lifting curtains, which is applied to lifting curtains without exposed pull cords, so that the driving force of the operator can be smoothly transmitted to the output end to drive The shade component of the curtain is stretched downward or retracted upward, but the weight of the shade component will not be transmitted back to the input end, so that the shade component can be stably and reliably positioned at the expected height.

Another object of the present invention is to provide a lift-type curtain without exposed pull cords, and its shielding components can be stably positioned at the current height immediately after the height is adjusted.

In order to achieve the main purpose of the previous disclosure, the one-way transmission device provided by the utility model includes: a base, which is located on the headrail of the curtain, and has a horizontal fixed shaft; an input shaft, with one end facing The lower form is pivoted on the base, which can be controlled by the user to rotate in situ; an output shaft has a shaft part, and the shaft part is pivoted on the fixed shaft and connected to the input shaft It can be driven to rotate in situ; the peripheral wall of the shaft has a gap; a transmission shaft has a set of simple parts, and the sleeve is sleeved on the shaft of the output shaft; There is a convex part on the inner peripheral surface, and the convex part is located in the gap of the output shaft; the transmission shaft is coaxially engaged with a linkage rod pivoted on the upper horizontal frame so as to be forced to rotate with each other, and the linkage rod When rotating, it can drive the shielding assembly of the curtain to extend downward or contract upward; at least one helical spring each has a circular tube-shaped helical part, and two contact parts protruding radially outward from the helical part; The spiral part is wrapped around the fixed shaft of the base, and is located inside the shaft cylinder of the output shaft. on different sides of the circumference; moreover, when the output shaft rotates, the side edge of the notch can be pushed against one of the abutting parts of each spring, so that the inner diameter of the spiral part of the spring will expand along the way, so that the output shaft can smoothly drive the The transmission shaft rotates; when the output shaft does not move, when the transmission shaft is driven by the sinking of the shielding assembly to rotate, the convex part can be pushed against one of the contact parts of the springs, and the inner diameter of the spiral part of the spring is reduced along the trend, thereby the The drive shaft can immediately lock and cannot continue to rotate.

In order to achieve another purpose disclosed above, the lifting curtain provided by the utility model includes: an upper horizontal frame; a shielding component, which is located under the upper horizontal frame and can be extended downward or upward; a linkage rod , pivotally arranged on the upper horizontal frame, which can drive the shielding assembly to extend downward or upward when rotating; a one-way transmission device, which is the structure described in the previous paragraph; a control lever, which can be connected with the input shaft of the one-way transmission device Engaged, and can be controlled by the operator to rotate, so as to drive the input shaft to rotate in situ.

The structure and effect of the utility model are described in detail by citing a preferred embodiment in conjunction with the drawings.

Description of drawings

Fig. 1 is a schematic structural view of a lifting curtain in a preferred embodiment of the present invention;

Fig. 2 is a front sectional view of the one-way transmission device in a preferred embodiment of the present invention;

Fig. 3 is a sectional view along section line 3-3 in Fig. 2;

Fig. 4 is a sectional view along line 4-4 in Fig. 2;

Fig. 5 is a perspective view of a cylindrical member in a preferred embodiment of the utility model;

Fig. 6 is a perspective view of a fitting in a preferred embodiment of the present invention;

Fig. 7 is a perspective view of a coil spring in a preferred embodiment of the present invention;

Fig. 8 is similar to Fig. 4, is a schematic diagram of the action of a preferred embodiment of the utility model, showing the state when the output shaft rotates; and

Fig. 9 is also similar to Fig. 4, and is another schematic diagram of the action of a preferred embodiment of the present invention, showing the state when the output shaft is stationary and the transmission shaft is about to rotate.

Detailed ways

Please refer to Figure 1 first, which is a preferred embodiment of the lift-type curtain without exposed pull cord provided by the utility model. In the illustration, the venetian blind is used as an example, but the utility model can also be equally applied to roller blinds, pleated curtains, etc. Various lifting curtains such as blinds or Roman blinds. As shown in the figure, the curtain generally includes: an upper horizontal frame 12 for fixing on the top edge of the window; It is composed of a number of curtain leaves 16 arranged in parallel, and these curtain leaves can be expanded discretely downward or folded and contracted upward; a linkage rod 18 is horizontally pivoted inside the upper horizontal frame 12, and can be rotated on the spot. Drive this shielding assembly 14 to stretch downward or to condense upward. In this example, the existing structure is also used. The end is connected to the lower cross bar 22 on the bottom side of the curtain leaf 16, and the top end is connected to the reel 24 on the linkage rod 18 to achieve; a one-way transmission device 26 is located at one end of the upper horizontal frame 12. The creation focus of the utility model, the structure will be detailed later, the main function is to transmit the torsion of its input end to the output end, and can prevent the torsion from being passed back to the input end from the output end; a control rod 28 has a straight rod 30, which is connected to the The connection structure below the one-way transmission device 26 will be detailed later. A crank 32 is provided at the bottom end, which can be rotated by the user to input torque into the transmission device 26 .

Then please refer to Fig. 2 and Fig. 3, this one-way transmission device 26 is to comprise:

A base 34 is formed by locking a main shell part 36 and a secondary shell part 38. The longitudinal section is generally rectangular, and is embedded in the interior of the aforementioned upper horizontal frame 12 shown in FIG. One of the ends of the upper horizontal frame 12 is the left end in this example. A cylindrical groove 40 coaxial with the linkage rod 18 is formed on the side of the base 34 that is closer to the outer end of the upper horizontal frame 12 , and the end of the receiving groove 40 that is closer to the inner side of the upper horizontal frame 12 communicates with it. A coaxial but smaller diameter cylindrical shaft hole 42 , the shaft hole 42 penetrates to the surface of the base 34 . From the central position of the end surface of the container 40 away from the shaft hole 42, a fixed shaft 44 protrudes out of the base 34 along the axial direction toward the shaft hole 42. The fixed shaft 44 is hollow tubular, and the near outer end is A small-diameter portion 46 is formed, and the periphery of the outermost end is beveled. At the same time, there are two opposite notches 48 extending inward from the end edge on the tube wall, so that the outer end of the fixed shaft 44 can be slightly restrained. The bottom of the base 34 corresponds to the left corner in FIG. 3 on the side of the chamber, and has a pivot hole 50 that penetrates obliquely and radially from the outside to the container 40 .

An input shaft 52 is a bevel gear with a shaft portion 54 and a helical gear portion 56 connected to one end of the shaft portion. The input shaft 52 is pivotally installed in the pivot hole 50 of the base 34 with the shaft portion 54, so that the helical gear portion 56 is located in the housing 40, and the bottom end of the shaft portion 54 protrudes from the base 34 and above. The outside of the horizontal frame 12 is obliquely directed downward to the indoor side. In addition, the bottom end of the shaft portion 54 is provided with a radial perforation 58; the top end of the straight rod 30 of the control rod 28 is hooked around the perforation 58 by a hook 60, so that the top end of the control rod 28 can be connected in a multi-directional manner. It is located at the bottom of the input shaft 52 , and the input shaft 52 can be driven to rotate when the joystick 28 rotates.

An output shaft 62 is also a bevel gear in essence, and has a shaft portion 64 and a helical gear portion 66 connected to one end of the shaft portion. The output shaft 62 is sleeved on the fixed shaft 44 of the base 34 by the cylindrical portion 64 , so that the helical gear portion 66 is located in the cavity 40 and engaged with the helical gear portion 56 of the input shaft 52 . In this embodiment, the number of teeth of the helical gear portion 56 of the input shaft 52 is less than the number of teeth of the helical gear portion 66 of the output shaft 62 , thereby achieving a transmission effect of deceleration and multiplication of force. In addition, please refer to FIG. 4 , there is a notch 68 on the peripheral wall of the shaft tube portion 64 , and the width of the notch 68 on the circumference is about a quarter of a circle.

A transmission shaft 70 is composed of a cylindrical part 72 as shown in FIG. 5 and a fitting part 74 as shown in FIG. 6 based on the assembly practice in this embodiment. The cylindrical member 72 has a generally cup-shaped sleeve portion 76, and the central position of the end surface of the sleeve portion 76 has a bundle tube 78 passing through in the axial direction, and protrudes outward from the circumference of the bundle tube 78 on the outer end surface. Three flexible barbs 80 distributed equiangularly are provided, and the tail ends of each barb 80 are hooked from inside to outside. The inner peripheral surface of the sleeve portion 76 has a strip-shaped convex portion 82 extending in the axial direction. The cylindrical member 72 is sleeved on the outer periphery of the shaft cylinder portion 64 of the output shaft 62 with the sleeve portion 76 ring-attached. The protrusion 82 on the inner peripheral surface of the cylindrical part 76 is located in the notch 68 of the shaft cylindrical part 64 as shown in FIG. 4 ; The outer end is nested to the small-diameter portion 46 of the fixed shaft 44 by utilizing the above-mentioned beveled shape and converging ability of the end of the fixed shaft 44; thereby, the cylindrical member 72 and the output shaft 62 are pivoted in a freely rotatable manner. On the fixed shaft 44, there is no danger of falling off.

On the other hand, the fitting part 74 is in the shape of a round basin, with three locking grooves 84 equiangularly distributed on the peripheral wall, and an inserting hole 86 penetrating in the axial direction at the center of the end surface. The cross-sectional shape of the moving rod 18 is, for example, a regular hexagon. The fitting part 74 is fitted with the cylindrical part with the opening facing the cylindrical part 72, so that the tail ends of the flexible barbs 80 of the cylindrical part 72 are respectively hooked into the slots 84 of the fitting part 74, so that Make the two 7274 form the aforementioned power transmission shaft 70 and act synchronously. Moreover, the insertion hole 86 of the fitting part 74 is coaxially fitted with the end of the linkage rod 18 , so that the transmission shaft 70 and the linkage rod 18 can rotate mutually.

Two helical springs 88, the appearance of each spring 88 is as shown in Figure 7, is to comprise a helical part 90 that is circular tube, and a first abutting part 92 protruding radially outwards from two ends of this helical part 90 respectively and A second resisting portion 92, wherein the included angle of the two resisting portions 9294 is about 90 degrees, and the spiral portion 90 of the spring 88 is bent outwards on the inner side of the aforementioned included angle to form each resisting portion 9294. The two springs 88 are in the same helical direction, so that the helical part 90 wraps around the fixed shaft 44 of the base 34 and is located inside the shaft cylinder part 64 of the output shaft 62, and, as shown in Figure 4, each The two abutting portions 9294 of the spring 88 protrude in the notch 68 of the output shaft 62, and are respectively located on different sides of the circumference of the convex portion 82 of the transmission shaft 70; in this example, the two abutting portions of the spring 88 The portions 9294 abut against two opposite side edges of the notch 68 respectively.

The above is the detailed structure of the lifting curtain in a preferred embodiment of the present invention, especially the one-way transmission device therein. With the lift-up structure, if the user wants to adjust the covering area of the curtain, he can turn the crank 32 at the bottom of the control rod 28 to make the straight rod 30 rotate in a predetermined direction, so as to drive the one-way transmission device 26 above. The input shaft 52 correspondingly rotates. When the input shaft 52 is driven to rotate, the output shaft 62 coupled with it will be driven to rotate correspondingly. Please refer to Fig. 4, when the output shaft 62 rotates, it will push against the same-side contact portion 9294 of each coil spring 88 with one side of the notch 68 of the shaft tube 64. Note: According to the drawing, if the output shaft 62 Clockwise rotation will push against the first abutting portion 92, and clockwise rotation will push against the second abutting portion 94, and based on the aforementioned relationship between the helical portion 90 of the spring 88 and the second abutting portion 9294, regardless of the direction of rotation as the output axis When the 62 pushes against the contact portion 9294 of the spring 88 along the circumference, it pushes the end of the spring 88 along the helical direction from the end to the inside, so that the inner diameter of the helical portion 90 of the spring 88 is slightly enlarged, so that it can be loosely mounted on the fixed shaft 44 In this way, the output shaft 62 can be smoothly driven by the input shaft 52 to rotate because it can push the spring 88 to rotate. Assuming that the user drives the output shaft 62 to rotate counterclockwise in FIG. 4, as shown in FIG. The convex portion 82, and then, the output shaft 62 can continuously push the transmission shaft 70 to rotate synchronously therewith. When the power transmission shaft 70 rotates, it can directly drive the aforementioned linkage rod 18 engaged with it to rotate in situ, so that the two reels 24 on the linkage rod 18 can be rolled up or the two suspension ropes 20 can be released downward, so that The curtains 16, that is, the shielding components 14 are condensed upwards or stretched downwards to change the area of the shielded window.

After adjusting to the desired height, the user can let go of the control lever 28. At this time, the weight of the shielding assembly 14 will pull the suspension rope 20 downwards, thereby generating a force that drives the linkage rod 18 and the transmission shaft 70 to rotate. However, referring to Fig. 9, assuming that the aforementioned torsional force is to make the transmission shaft 70 rotate clockwise, then the transmission shaft 70 will reach the strip-shaped protrusion 82 on its inner peripheral surface just after it is about to rotate or rotate a slight angle. The first abutting portion 92 of the two springs 88 is just opposite to the aforementioned situation at this time. The transmission shaft 70 pushes against the abutting portion 92 of the spring 88 along the circumference, pushing the end of the spring 88 along the helical direction from the inner side to the end. The internal diameter of the helical part 90 of the spring 88 is slightly reduced, and it is tightly bound on the fixed shaft 44 and cannot rotate; in this way, the transmission shaft 70 is immediately unable to rotate due to being blocked by the contact part 92 of the spring 88, and the shielding assembly 14 will not sink downward. .

With the above mechanism, after the user adjusts the shade component of the curtain to the desired height, no other action is required to lock the shade component; once the user does not turn the control lever, the input force of the one-way transmission device will When the shaft is not driven, the shielding component will immediately stop at the current height, which is not only very convenient in operation, but also the shielding component can be positioned stably and accurately, and is not easy to slide down at will. In addition, in conjunction with the structure of the one-way transmission device, the lift-type curtain uses a control rod for the user to control the lifting of the shielding component, and does not have exposed bead chains or pull ropes, which can avoid accidents caused by ropes being entangled with people.

It must be added that the input shaft and output shaft in the one-way transmission mechanism of the present invention are used to convert the input torque rotating along the longitudinal axis into the output torque rotating along the horizontal axis; In addition to the bevel gear of the embodiment, of course, the worm can also be used as the input shaft, and the worm wheel can be used as the output shaft, so that the anti-reverse effect of torsion can be more reliable.

In addition, the one-way transmission mechanism of the utility model has the following advantages in terms of detailed space design in addition to the one-way torsion transmission and the function of ensuring the positioning of the curtains:

1. Modular design, convenient assembly: the one-way transmission mechanism of the utility model uses a base to cover the components to form a modular design. Therefore, when the curtain is assembled, only the curtain needs to be connected. The moving rod is directly inserted into the one-way transmission mechanism, and it can be replaced quickly even for maintenance in the future.

2. Small size: the input shaft design of the utility model skillfully connects the vertically arranged transmission rod and the control rod for force transmission; at the same time, the bottom end of the input shaft protrudes outside the base, so that the control rod can be quickly connected, so that A single input shaft component has multiple functions, which greatly simplifies the components and minimizes the space.

Therefore, what is described above is only a preferred feasible embodiment of the present invention, so all equivalent structural changes made by applying the description of the present invention and the scope of the patent application should be regarded as the creative spirit of the present invention.

Claims (18)

1. A one-way transmission device for a lifting curtain, the curtain has an upper horizontal frame, a linkage rod pivotally arranged on the upper horizontal frame, and a shielding assembly arranged below the upper horizontal frame, the linkage rod When rotating, it can drive the shielding assembly to extend downward or contract upward. It is characterized in that the one-way transmission device includes: A base, set on the upper horizontal frame, has a horizontal fixed axis; An input shaft is pivotally installed on the base with one end facing down, and can be controlled by the user to rotate on the spot; An output shaft has a shaft portion, the shaft portion is pivoted on the fixed shaft of the base, and connected to the input shaft so as to be driven by the input shaft to rotate in situ; the surrounding wall of the shaft portion has a gap; A transmission shaft has a sleeve part, and the sleeve part is sleeved on the shaft cylinder part of the output shaft; the inner peripheral surface of the sleeve part has a convex part, and the convex part is located in the gap of the output shaft ; The transmission shaft is coaxially engaged with the aforementioned linkage rod and can be forced to rotate mutually; and At least one helical spring, each having a helical part in the shape of a circular tube, and a first and a second abutment protruding radially outward from the helical part; the helical parts of each spring are wrapped around The fixed shaft of the base is located inside the shaft cylinder of the output shaft, and the two abutting parts protrude into the notch of the output shaft, and are respectively located on different sides of the circumference of the convex part of the transmission shaft. Moreover, when the output shaft rotates, the side edge of the notch can be pushed against one of the abutting parts of each spring, so that the inner diameter of the helical part of the spring can expand along the way; when the output shaft does not move, the protruding shaft can be rotated The part pushes against one of the abutting parts of each spring, and makes the inner diameter of the helical part of the spring shrink along the way. 2 . The one-way transmission device for lifting curtains as claimed in claim 1 , wherein both the input shaft and the output shaft are bevel gears. 3. The one-way transmission device for lifting curtains as claimed in claim 1, wherein the input shaft is a worm, and the output shaft is a worm wheel. 4 . The one-way transmission device for lifting curtains as claimed in claim 1 , wherein the two contact portions of each of the springs protrude outward from the two ends of the helical portion respectively. 5 . The one-way transmission device for a lift-type curtain as claimed in claim 1 , wherein the base is formed by coupling and locking a main shell part and a secondary shell part. 6 . 6. The one-way transmission device for lifting curtains as claimed in claim 1, wherein a cylindrical groove and a cylindrical shaft hole coaxial and communicated with the base are formed inside the base, and the shaft hole is It passes through to the surface of the base, so that the fixed shaft protrudes out of the base from the slot along the axial direction toward the shaft hole. 7. The one-way transmission device for lifting curtains as claimed in claim 1, wherein a small-diameter portion is formed near one end of the fixed shaft of the base, and the end has a radial portion extending inward from the end surface. The end is notched so that the end can be slightly narrowed; the sleeve part of the drive shaft is roughly cup-shaped, and the center of the end surface has a bundle tube passing through the axial direction, and the bundle tube is nested in the small diameter part of the fixed shaft . 8. The one-way transmission device for lifting curtains as claimed in claim 1, wherein the transmission shaft is composed of a cylindrical part and a fitting part; the cylindrical part has a cup-shaped The above-mentioned sleeve part protrudes from the outer peripheral surface of the sleeve part with a number of flexible barbs; The tail end of the flexible barb of the shape piece is buckled; the center of the end surface of the fitting piece has an embedding hole, which is used for inserting the above-mentioned linkage rod. 9. A lifting curtain without an exposed pull cord, characterized in that it comprises: a horizontal frame; A shielding component is arranged under the upper horizontal frame and can be extended downwards or retracted upwards; A linkage rod, pivotally arranged on the upper horizontal frame, can rotate in situ, and can drive the shielding assembly to extend downward or contract upward according to its direction of rotation when rotating; A one-way transmission device includes a base, an input shaft, an output shaft, a transmission shaft and at least one coil spring; wherein: The base, set on the upper horizontal frame, has a horizontal fixed axis; the input shaft is pivotally mounted on the base with one end facing downward; The output shaft has a shaft portion, which is pivotally sleeved on the fixed shaft of the base, and connected to the input shaft so as to be driven by the input shaft to rotate in situ; the surrounding wall of the shaft portion has a gap; The transmission shaft has a sleeve portion, and the sleeve portion is sleeved on the shaft cylinder portion of the output shaft; the inner peripheral surface of the sleeve portion has a convex portion, and the convex portion is located in the gap of the output shaft ; The transmission shaft is coaxially engaged with the aforementioned linkage rod and can be forced to rotate mutually; Each of the helical springs has a circular tube-shaped helical portion, and a first abutment and a second abutment protruding radially outward from the helical portion; the helical portion of each spring is wrapped around the The fixed shaft of the base is located inside the shaft cylinder of the output shaft, and the two abutting parts protrude from the gap of the output shaft, and are respectively located on different sides of the circumference of the convex part of the transmission shaft. and, when the output shaft rotates, the side edge of the notch can be pushed against one of the abutting parts of each spring, so that the inner diameter of the helical part of the spring can be enlarged; when the output shaft does not move, the convex part can be rotated Push against one of the abutting parts of each spring, and make the inner diameter of the helical part of the spring smaller; A control rod is connected with the bottom end of the input shaft, and can be driven by the user to drive the input shaft to rotate in situ. 10 . The liftable curtain without an exposed pull cord as claimed in claim 9 , wherein both the input shaft and the output shaft are bevel gears. 11 . 11. The liftable curtain without an exposed pull cord as claimed in claim 9, wherein the input shaft is a worm, and the output shaft is a worm wheel. 12 . The liftable curtain without an exposed pull cord as claimed in claim 9 , wherein the two contact portions of each of the springs respectively protrude outward from the two ends of the spiral portion. 13 . 13. The liftable curtain without an exposed drawstring as claimed in claim 9, wherein the base is formed by locking a main shell part and a secondary shell part. 14. The lift-type curtain without an exposed pull cord as claimed in claim 9, wherein a cylindrical groove and a cylindrical shaft hole coaxial and communicated with the base are formed inside the base, and the shaft hole is It passes through to the surface of the base, so that the fixed shaft protrudes out of the base from the slot along the axial direction toward the shaft hole. 15. The lift-type curtain without an exposed pull cord as claimed in claim 9, wherein a small-diameter portion is formed near one end of the fixed shaft of the base, and the end has an inward extension from the end surface. The end is notched so that the end can be slightly narrowed; the sleeve part of the drive shaft is roughly cup-shaped, and the center of the end surface has a bundle tube passing through the axial direction, and the bundle tube is nested in the small diameter part of the fixed shaft . 16. The lift-type curtain without an exposed pull cord as claimed in claim 9, wherein the transmission shaft is composed of a cylindrical part and a fitting part; the cylindrical part has a cup-shaped The above-mentioned sleeve part protrudes from the outer peripheral surface of the sleeve part with a number of flexible barbs; The tail end of the flexible barb of the shaped piece is buckled; the center of the end surface of the fitting piece has an embedding hole; one end of the linkage rod is inserted into the embedding hole. 17. The lift-type curtain without an exposed pull cord as claimed in claim 9, wherein the one-way transmission device is provided at one end of the upper horizontal frame; the top end of the control rod can move in multiple directions It is connected to the bottom end of the input shaft by way, and hangs below the upper horizontal frame at ordinary times. 18. The lift-type curtain without an exposed pull cord as claimed in claim 9, wherein the control rod is an independent component, and its top end is detachably fitted to the bottom end of the input shaft when in use. .

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