Blind-driving device with easily detachable driving shaft

Abstract

The present invention relates to a device for winding or unwinding a cord that supports slats of a blind, and specifically to a blind-driving device with an easily detachable driving shaft, in which the driving shaft for winding or unwinding the slat cord is connected to the driving device, and a means for fixing the driving shaft is improved, thereby allowing easy fixing and detachment. The objective of the present invention is to provide the blind-driving device with an easily detachable driving shaft, the device having additional features of allowing the driving shaft to be firmly fixed using an elastic plate by simply pushing the driving shaft into a push rod of the driving device, and having locking protrusion pieces of the elastic plate, firmly supported by the surface of the driving shaft, spread apart and separated from the surface of the driving shaft, thereby enabling the driving shaft to be easily detached. In order to implement the objective, the present invention, in which the driving shaft (4) is connected to a winding rod (A), the driving shaft (4) is connected to the driving device (B) so as to be rotatably driven and a driving cord (3) is connected to the driving device (B) so as to be rotatably driven, comprises: an elastic plate support piece (40, 90) having a through-hole through which the end portion of the driving shaft (4) passes, and having a space part of which the inner peripheral surface of the rear end portion is stepped; the push rod (50), which is mounted so as to be able to move forward and backward along the driving shaft (4) in the through-hole of the elastic plate support piece (40, 90), has a flange (51) formed at the rear end portion thereof so as to allow limited movement in the stepped space part, and has push rod protrusions (52) protruding rearward; and the elastic plate (60), which is supported by the perimetric portion of the elastic plate support piece (40, 90), has a hole, and has the pair of locking protrusion pieces (61) protruding into the hole so as to be inclined rearward such that the ends of the locking protrusion pieces (61) are elastically supported on the surface of the end portion of the driving shaft (4), wherein, when the push rod (50) is pushed, the push rod protrusions (52) push the locking protrusion pieces (61) and separate same from the surface of the fixed shaft (4).

Description

Blind drive unit with easy drive shaft separation

[0001] The present invention relates to a device for winding or releasing a string supporting a slat of a blind, and relates to a blind driving device with an easy-to-separate drive shaft, which connects a driving shaft for winding or releasing a slat string to a driving device and improves a means for fixing the driving shaft so that fixing and separation are easy.

[0002] Typically, blinds are installed to fit the size of the window and are used to block sunlight.

[0003]

[0004] The above-mentioned blind for blocking sunlight comprises a main body that is supported by brackets fixed to a wall or ceiling so as to be able to move in the axial direction and has a hole formed on the bottom surface through which a string passes; a winding device mounted inside the main body that operates to wind or unwind a string by the rotation of a driving line; and thin plate slats that are supported horizontally at a certain interval from the strings wound on the winding device.

[0005]

[0006] In the blinds of this prior art, when the driving line rotates in the forward or reverse direction, the string wound on the winding device is released, and the thin slats are spread downward to block sunlight, or when the string is wound, the thin slats are folded upward to allow sunlight to enter the room.

[0007]

[0008] As shown in FIGS. 16 and 17, the conventional honeycomb blind is provided with a rotation shaft (1) that is driven forward and backward by a drive line (3) on the rear side of the first housing (2) of the drive device (B) to which the drive line (3) is rotatably connected, and a rotation member (6) that is connected to the rotation shaft (1) and rotates together with a spring (7) is provided on one side inside the first housing (2), a second housing (10) is provided on the front side of the first housing (2), and a drive gear (5) is drivably connected to the drive device on one side inside the second housing (10), and a through hole is formed in a driven gear (8) that rotates while meshing with the drive gear (5), so that the rear end of the drive shaft (4) is fitted through the through hole of the driven gear (8), and an elastic plate (9) is elastically attached to the end of the drive shaft (4).

[0009]

[0010] Here, a concave portion is formed concentrically on the rear surface of the driving gear (5), and a coupling groove (a) is formed at each end axially cut at a symmetrical position on the inner surface of the concave portion, and a coupling projection (b) is formed at a symmetrical position on the outer surface of the front end of a rotating member (6) that is detachably inserted into the concave portion, so that when the front end of the rotating member (6) is inserted into the rear concave portion of the driving gear (5), a pair of coupling projections (b) are fitted into the coupling groove (a) so as to rotate together inside the first housing (1).

[0011]

[0012] In addition, as shown in FIGS. 18 and 19, the conventional Venetian blind is provided with a first housing (2') of a driving device (B) to which a driving line (3) is rotatably connected, and a rotating shaft (1') having a driving gear (5') integrally connected to the front is provided, a gear portion (c) having teeth formed on an inner surface of a predetermined diameter is provided on the front of the first housing (2'), and a driven gear (8') having four meshing teeth coupled to a rotating plate (16) having pins (d) formed on the inside of one side of the first housing (2') is operated by meshing the teeth on the inner surface of the gear portion (c) with the driving gear (5') of the first rotating shaft (1'), and a second housing (10') is coupled to the front of the first housing (2') of the driving device, and a spring (7) is provided inside the second housing (10'). The second rotating part (15) that is coupled to the pin (d) of the supported first rotating part (14) and the rotating plate (16) rotates together with the driven gear (8'), and the driving shaft (4) is inserted into the first rotating part (14) through the second housing (10') and then fixed by a fixing screw (17).

[0013]

[0014] In these conventional honeycomb blinds or Venetian blinds, when the drive device (B) is rotated by the drive line (3), the drive shaft (4) is rotated, and the screw shaft (C) and the winding rod (A) linked to the drive shaft (4) are rotated, and the string connected to the slat is wound around the winding rod, causing the slat to rise and fall.

[0015]

[0016] Meanwhile, when the honeycomb blind is pushed into the through hole of the driven gear (8), the drive shaft (4) is pushed into the second housing (10) by pushing the engaging protrusion of the elastic plate (9) supported between the elastic plate support member (13) and the rear surface of the driven gear (8), so that the engaging protrusion is elastically pressed against the outer surface of the drive shaft (4).

[0017]

[0018] However, this conventional blind drive device (B) had a problem in that the drive shaft (4) could not be separated again because the catch protrusion of the elastic plate (9) was firmly supported in a bent state on the outer surface of the drive shaft (4).

[0019]

[0020] And, the Venetian blind has a drive shaft (4) that is fixed by a fixing screw (17) formed on the first rotating part (14), but because it is supported firmly, there is a problem that it is not easily separated or that the drive shaft (4) must be separated using a tool, which is cumbersome.

[0021] The purpose of the present invention is to solve the above-mentioned problem, and to provide a blind drive device with easy drive shaft separation, in which the drive shaft is firmly fixed by an elastic plate simply by pushing it into the drive shaft of the drive device, and a configuration is added to separate the drive shaft from the drive shaft surface by spreading the engaging protrusion of the elastic plate firmly supported on the drive shaft surface, thereby enabling the drive shaft to be easily separated.

[0022]

[0023] In order to achieve the above object, the present invention provides an elastic plate support member in which a drive shaft is connected to a winding rod, the drive shaft is rotatably connected to a drive device, and a drive line is rotatably connected to the drive device, wherein a through hole is formed through which a distal end of the drive shaft passes, and a space portion forming a step is provided on an inner surface of a rear end; a push rod that is mounted so as to be movable back and forth along the drive shaft within the through hole of the elastic plate support member, a flange is formed at the rear end to restrict movement within the step space portion, and a push rod projection is provided to protrude rearward; and on the outer surface of the elastic plate support member

[0024] It is characterized by being supported by a hole formed and a pair of hook projections protruding backwardly and obliquely into the hole, the ends of the hook projections being elastically engaged with the surface of the distal end of the driving shaft, and an elastic plate that pushes the hook projections to separate from the surface of the fixed shaft when the push rod is pushed.

[0025]

[0026] According to the present invention, when the drive shaft is pushed in, the engaging projection of the elastic plate spreads and enters, and at this time, the engaging projection is elastically adhered to the surface of the drive shaft to restrict movement, and when the push rod exposed to the outside is pushed backward, the push rod projection spreads while pushing the engaging projection, thereby separating it from the surface of the drive shaft, thereby allowing the drive shaft to move freely, thereby making the fixing and detachment of the drive shaft easy and simple.

[0027]

[0028] Figure 1 is a perspective view showing a honeycomb blind of the first embodiment of the present invention.

[0029] Figure 2 is an exploded perspective view showing the honeycomb blind of the first embodiment of the present invention with the frame removed.

[0030] Figure 3 is an exploded perspective view showing the driving device of the first embodiment of the present invention.

[0031] Figure 4 is a perspective view showing a driving device of the first embodiment of the present invention;

[0032] Figure 5 is a drawing showing the first embodiment of the present invention in which a drive shaft is inserted and a hook protrusion of an elastic plate is formed.

[0033] A cross-sectional view showing a state of elastic adhesion to a coaxial surface,

[0034] Figure 6 is an enlarged cross-sectional view of part A of Figure 5 of the present invention.

[0035] Figure 7 is a cross-sectional view showing a state in which the engaging protrusion of the elastic plate is pushed by the push rod in the first embodiment of the present invention, and the engaging protrusion is separated from the surface of the driving shaft and detached.

[0036] Figure 8 is an enlarged cross-sectional view of part B of Figure 7 of the present invention.

[0037] Fig. 9 is a perspective view showing a Venetian blind of the second embodiment of the present invention.

[0038] Figure 10 is an exploded perspective view showing a driving device of the second embodiment of the present invention.

[0039] Figure 11 is a perspective view showing a driving device of the second embodiment of the present invention.

[0040] Figure 12 is an exploded perspective view showing the connection relationship between the drive shaft and the elastic plate in the second embodiment of the present invention.

[0041] Figure 13 is an isometric exploded perspective view showing the drive shaft and elastic plate of the drive device in the second embodiment of the present invention in a cut state.

[0042] Figure 14 is an isometric cross-sectional perspective view showing a state in which the engaging protrusion of the elastic plate is elastically engaged with the surface of the drive shaft in the second embodiment of the present invention.

[0043] Fig. 15 is an isometric cross-sectional perspective view showing a state in which the engaging protrusion is separated from the surface of the drive shaft by pushing the engaging protrusion in the second embodiment of the present invention.

[0044] Figure 16 is an exploded perspective view showing the driving device of a conventional honeycomb blind.

[0045] Fig. 17 is a perspective view showing a driving device of a conventional honeycomb blind.

[0046] Figure 18 is an exploded perspective view showing the driving device of a conventional Venetian blind.

[0047] Fig. 19 is a perspective view showing the driving device of a conventional Venetian blind.

[0048]

[0049] The present invention, as illustrated in FIGS. 1 to 4, comprises a drive shaft (4) connected to a winding rod (A), a drive device (B) drivably connected to the drive shaft (4), and a drive line (3) provided at the end of a frame (F) in which a first housing (2) of the drive device (B) is built to enable rotational driving of a rotational shaft (1) inside the drive device (B) in forward and reverse directions; a second housing (10) provided on the front of the first housing (2) so as to have a predetermined internal space and having a front cover (11) coupled to the front; a drive gear (20) rotatably mounted on one side of the interior of the second housing (10) so as to be linked with the drive device (B); a driven gear (30) which is configured to rotate by engaging with the drive gear (20) inside the second housing (10), and has an operating space portion concavely formed on the front, and fixed projections (31) are provided on the outer circumference of the front; An elastic plate support member (40) having an outer circumference of the front end rotatably mounted on the front cover (11) of the second housing (10), fixed projections (41) formed on the outer circumference of the rear end to mesh with fixed projections (31) of a driven gear (30), a stepped portion formed on the inner circumference of a pair of fixed projections (41') at symmetrical positions among the fixed projections (41), and a space formed as a stepped portion on the inner circumference of the rear end where a through hole is formed; a push rod (50) that is axially movably mounted in the through hole of the elastic plate support member (40), and is formed in the shape of a square shaft so that a driving shaft (4) is inserted through it and rotates together, and a flange (51) is provided at the shaft end so that movement is limited by the stepped portion of the through hole of the elastic plate support member (40), and a pair of push rod protrusions (52) are provided at the end to protrude rearward;The basic technical feature of the invention is that the outer part of the elastic plate support member (40) is mounted between the inner surface step (41') of the elastic plate support member (40) and the front contact surface of the driven gear (30), and a hole is formed on the inside of the plate, and a hooking protrusion (61) is provided on both sides of the inner surface of the hole so as to protrude toward the working space of the driven gear (30) and to be inclinedly engaged with the surface of the driving shaft (4) protruding through the push rod (50).

[0050]

[0051] The present invention, which is configured in this manner, is such that when the drive line (3) is operated, the rotary shaft (1) and the drive gear (20) rotate, the driven gear (30) rotates by the drive gear (20), the elastic plate support member (40) engaged with the driven gear (30) rotates in the same direction, and the push rod (50) and the drive shaft (4) also rotate together.

[0052]

[0053] And, as shown in FIGS. 5 to 8, the tip of the push rod (50) is provided to protrude outward from the elastic plate support member (40), and when the push rod (50) is pushed backward, the two push rod projections (52) on the rear of the push rod (50) push the engaging projections (61) of the elastic plate (60) to spread the engaging projections (61) to both sides, thereby separating the engaging projections (61) from the surface of the drive shaft (4) and detaching them, thereby allowing the drive shaft (4) to move in the axial direction and be completely separated from the drive device (B). Conversely, when the completely separated drive shaft (4) is pushed into the drive device (B) through the push rod (50), the two engaging projections (61) of the elastic plate (60) are elastically pressed against the outer surface of the drive shaft (4) at an angle, so that the drive shaft (4) is maintained in a fixed state.

[0054]

[0055] In addition, when the position of the drive shaft (4) is slightly moved and the push rod (50) is moved forward, the two catch protrusions (61) of the elastic plate (60) are elastically pressed against the outer surface of the drive shaft (4) at an angle, so that the drive shaft (4) is maintained in a fixed state.

[0056]

[0057] Here, the second housing (10) has a rotating projection and a rotating hole formed on the rear, so that the rear end of the driving gear (20) is rotatably supported in the rotating hole, and the rear end of the driven gear (30) is rotatably supported in the rotating projection, and large and small rotating parts of a certain diameter are formed on the front cover (11) coupled to the front, so that the outer circumference of the elastic plate support member (40) is rotatably mounted on the large rotating part, and the front end of the driving gear (20) is rotatably supported on the small rotating part, and through holes are formed at the corner portions, so that the fixing screws (12) penetrating the front cover (11) pass through the through holes and are coupled to the front of the first housing (2).

[0058]

[0059] The driving gear (20) has a rear end formed as a rotation shaft in the form of a bearing, and the bearing part is rotatably mounted in a rotation hole on the rear of the second housing (10). A concave portion is formed concentrically on the rear end, and a coupling groove (a) is formed at each end at a symmetrical position on the inner surface of the concave portion, and a coupling protrusion (b) is formed at a symmetrical position on the outer surface of the front end of a rotating member (6) that is detachably inserted into the concave portion, so that when the front end of the rotating member (6) is inserted into the rear concave portion of the driving gear (20), a pair of coupling protrusions (b) are fitted into the coupling groove (a) so that they rotate together inside the first housing (2).

[0060]

[0061] The driven gear (30) has concave spaces formed on the front and rear sides, and the inner surface of the rear end is rotatably supported by a rotational projection on the rear side of the second housing (10), and the engaging projection (61) of the elastic plate (60) can move back and forth in the front space, and fixed projections (31) are formed along the front circumference to engage with the fixed projections (41, 41') of the elastic plate support member (40) and rotate together.

[0062]

[0063] The elastic plate support member (40) has two pairs of fixed projections (41, 41') formed in the shape of a rear end that mesh with the fixed projections (31) of the driven gear (30), and a step is formed on the inner surface of one of the pair of fixed projections (41'), so that when the fixed projections (31) and the fixed projections (41, 41') mesh, a gap is created between the step of the fixed projection (41') and the front part of the fixed projection (31), and the outer part of the elastic plate (60) is supported movably in this gap.

[0064]

[0065] Meanwhile, FIGS. 9 to 14 illustrate a second embodiment of the present invention applied to Venetian blinds, in which the rear portion of the second rotating portion (15) is connected to the front of the first housing (2') of the driving device (B) driven by the driving line (3) so as to be rotatably driven, the front portion of the second rotating portion (15) and the first rotating portion (70) are connected to be rotated together by a spring (71) and a spring support plate (72), and the front end of the first rotating portion (70) is inserted into the rear end of an elastic plate mounting hole (80) in which a through hole through which the driving shaft (4) passes is formed.

[0066]

[0067] In addition, the elastic plate mounting member (80) has a mounting portion formed on the front, and a pair of fixed projections (81) are formed on the outer circumference of the front so that the elastic plate (60) is mounted on the mounting portion, and the elastic plate support member (90) on the front is connected in a form that is interlocked with the fixed projections (81).

[0068]

[0069] The elastic plate (60) has a hole formed on the inside, and a hook-and-loop protrusion (61) is formed protruding on both sides of the inner surface of the hole.

[0070]

[0071] This elastic plate (60) is pushed by the driving shaft (4) that protrudes through the push rod (50) while pushing the engaging protrusion (61) of the elastic plate (60), so that the engaging protrusion (61) is elastically pressed against the surface of the driving shaft (4) toward the rear with a predetermined incline.

[0072]

[0073] The elastic plate support member (90) is formed in a cylindrical shape with a hexagonal through hole formed inside, a step portion formed inside, and a pair of fixing protrusions (91) formed on the rear circumference so that the fixing protrusions (91) are connected by interlocking with the fixing protrusions (81) of the elastic plate mounting member (80), and a hexagonal cross-section-shaped push rod (50) is fitted into the through hole so as to be able to move in the axial direction.

[0074]

[0075] The push rod (50) has a through hole formed so that the drive shaft (4) can be inserted through it and rotate together, and a flange (51) is provided at the end of the shaft so that movement is restricted by the step of the through hole of the elastic plate support member (90), and a pair of push rod projections (52) are provided at the end so as to protrude rearward so as to push the engaging projection (61) of the elastic plate (60).

[0076]

[0077] In the second embodiment of the present invention configured as described above, when the drive line (3) is operated, the second rotating part (15) and the first rotating part (70) rotate together with the spring (71), the elastic plate mounting member (80) and the elastic plate support member (90) rotate in the same direction, and the push rod (50) and the drive shaft (4) also rotate together.

[0078]

[0079] And, when the tip of the push rod (50) is provided to protrude outward from the elastic plate support member (90), and the push rod (50) is pushed backward, the two push rod projections (52) on the rear of the push rod (50) push the engaging projections (61) of the elastic plate (60) to spread the engaging projections (61) to both sides, thereby separating the engaging projections (61) from the surface of the driving shaft (4) and detaching them, thereby allowing the driving shaft (4) to move in the axial direction and be completely separated from the driving device (B). Conversely, when the completely separated driving shaft (4) is pushed into the driving device (B) through the push rod (50), the two engaging projections (61) of the elastic plate (60) are elastically pressed against the outer surface of the driving shaft (4) at an angle, so that the driving shaft (4) is maintained in a fixed state.

[0080]

[0081] In addition, when the position of the drive shaft (4) is slightly moved and the push rod (50) is moved forward, the two catch protrusions (61) of the elastic plate (60) are elastically pressed against the outer surface of the drive shaft (4) at an angle, so that the drive shaft (4) is maintained in a fixed state.

Claims

1. In the case where a drive shaft (4) is connected to a winding rod (A), the drive shaft (4) is rotatably connected to a drive device (B), and the drive line (3) is rotatably connected to the drive device (B), An elastic plate support member (40,90) having a through hole formed through the end of the driving shaft (4) and a space formed with a step on the inner surface of the rear end; a push rod (50) that is mounted so as to be movable back and forth along the driving shaft (4) within the through hole of the elastic plate support member (40,90), and has a flange (51) formed at the rear end to allow limited movement within the step space, and a push rod protrusion (52) protruding rearward; and an outer surface of the elastic plate support member (40,90) A blind drive device with easy drive shaft separation, characterized in that it is supported by a bracket, a hole is formed, a pair of hooking projections (61) are provided in a shape that protrudes backwards in an inclined manner inside the hole, the ends of the hooking projections (61) are elastically engaged with the surface of the distal end of the drive shaft (4), and when the push rod (50) is pushed, the push rod protrusion (52) pushes the hooking projections (61) to separate them from the surface of the fixed shaft (4).

2. In paragraph 1, It is driven by rotation by the driving device (B), and the fixed projections (31) are outside the front circumference. A blind drive device with easy drive shaft separation, characterized in that a driven gear (30) formed on a main surface is provided, an elastic plate support member (40) is formed with two pairs of fixed projections (41, 41') that engage with the fixed projections (31) of the driven gear (30) in a cylindrical shape at the rear end, a step is formed on the inner surface of one pair of fixed projections (41'), and when the fixed projections (31) and the fixed projections (41, 41') engage, a gap is created between the step of the fixed projection (41') and the front part of the fixed projection (31), and the outer part of the elastic plate (60) is supported in this gap.

3. In paragraph 1, A blind drive device with easy drive shaft separation, characterized in that it is rotationally driven by a drive device (B), and has an elastic plate mounting member (80) having a pair of fixed projections (81) formed on the outer circumference of the front surface, and an elastic plate support member (90) has a pair of fixed projections (91) formed on the rear circumference, and when the fixed projections (91) engage with the fixed projections (81) of the elastic plate mounting member (80), a gap is created between the front portion of the fixed projections (91) and the fixed projections (81), and the outer portion of the elastic plate (60) is supported by this gap.

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