JP5611766B2 - blind - Google Patents

Description

  The present invention relates to a blind capable of rotating a slat by an operation dial.

  As this type of blind, one shown in Patent Document 1 is known.

  The blind shown here includes a head box incorporating a drum for rotating a ladder cord, an operation dial having a rotation center axis parallel to the longitudinal direction of the head box, and a first storage space for storing the operation dial. And an operation case provided with a second storage space for storing a shaft for connecting the operation dial and the drum, and provided so as to be fitted and assembled to a longitudinal end of the head box. The case is provided with openings on the front surface and the rear surface, and the operation dial stored in the first storage space can be operated through the openings on the front surface and the rear surface.

  As a result, the front and rear shapes of the operation case assembled to the head box can be made the same, so the operation case can be assembled to either the right end or the left end of the head box, and the operating position of the blind Parts can be shared regardless of which side is left or right.

No. 7-34151

  When a part of the operation dial is exposed from the opening as in the blind described in Patent Document 1, there is a problem that the operation is difficult because the degree of exposure is limited. If the exposure level of the operation dial is increased, the operation becomes easier. However, even if the radial dimension of the operation dial is increased, it is difficult to fit in the operation case.

  For this reason, it is conceivable to form recesses on the left and right sides of the opening of the operation case so as to relatively increase the degree of exposure without changing the radial dimension of the operation dial. Only the left and right widths are required in the operation case, which will affect the blind width. That is, as the concave portion, a space is required on both the left and right sides of the operation dial so that the operator's finger does not interfere with the concave portion. Therefore, the width of the operation portion is increased by that amount and is not particularly suitable for blinds with a small blind width.

  Further, since the rotation of the operation dial is transmitted to the rotation shaft at a ratio of 1: 1, there is a problem that the amount of rotation necessary for rotating the slat increases.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a blind capable of easily operating the operation dial while keeping the operation case small.

In order to achieve the above-described object, the invention according to claim 1 is an operation unit provided at one end of a head box, and a rotary shaft that is rotatably supported in the head box and can be rotated by the operation unit. And a blind comprising a plurality of ladder cords that are suspended from the head box and tilted in conjunction with rotation of the rotation shaft, and a plurality of slats that are supported in alignment with the ladder cords,
One end of the head box is provided with an operation case that accommodates the operation unit. The operation unit is connected to one end of the rotating shaft so as to rotate integrally with the rotating shaft, and the support is offset from the axis of the rotating shaft. An operation dial supported rotatably at a position, and an inner tooth is formed on the inner periphery of the operation dial. The operation dial rotates the outer gear in the same direction as the operation dial via the inner tooth. A part of the operation dial protrudes from the operation case and is exposed, and the operation dial can be rotated from the outside.

  According to a second aspect of the present invention, in the blind according to the first aspect, the operation dial can be supported at any one of the support positions provided symmetrically before and after the blind about the rotation axis in the operation case. According to the selected support position, a part of the operation dial is exposed from either the front surface or the rear surface of the operation case.

  According to the present invention, by offsetting the axis of the operation dial from the axis of the rotation shaft, the operation dial is disposed in the operation case so as to be offset from the axis of the rotation shaft. It can be exposed from the operation case. Thereby, since the degree of exposure from the operation case of the operation dial can be increased, it is possible to easily operate the operation dial while keeping the operation case small.

  Further, since the rotation is transmitted from the internal teeth of the operation dial to the external gear, a rotation difference is generated between the two, and the slat can be rotated with a small operation amount.

  Also, depending on the selected support position, the operation dial can be exposed from either the front or the back of the operation case, so it can be used for both right and left operation. In addition, sharing of left and right parts and switching between left and right operation positions can be supported.

It is a front view of the blind comprised for right operations. It is sectional drawing showing the state which accommodated the operation part in the operation case for right operation. It is the fragmentary sectional view seen along the AA line of FIG. It is a perspective view showing the state which accommodated the operation part in the operation case for right operation. It is a disassembled perspective view of the operation part and operation case comprised for right operations. It is a front view of the blind comprised for left operations. It is sectional drawing showing the state which accommodated the operation part in the operation case for left operation. It is a disassembled perspective view of the operation part and operation case comprised for left operations.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 5 show a blind according to the present invention configured for right operation, and an operation unit 14 is provided at the right end of the head box 10 in FIG.

  The operation unit 14 is accommodated in an operation case 28 provided at the right end of the head box 10, and is connected to one end of the rotary shaft 12 that extends in the longitudinal direction of the head box 10 and is rotatably supported. Thus, the rotary shaft 12 can be rotated.

  The rotary shaft 12 penetrates the two drums 16 that are rotatably supported in the head box 10 so as to rotate integrally. The upper end of the ladder cord 18 is connected to each drum 16 so that winding and unwinding are possible. The ladder cord 18 hangs down from the head box 10 and supports a large number of slats 20 in an aligned state. The ladder cord 18 tilts in conjunction with the rotation of the drum 16 that rotates integrally with the rotary shaft 12 to rotate the slats 20. It is supposed to let you. In addition, from the hanging position of each ladder cord 18 of the head box 10, one end of the lifting / lowering cord 22 hangs down and is connected to the bottom rail 24 disposed at the lower end of the slat 20 row so as to be lifted / lowered. The other end of the lifting / lowering cord 22 is routed in the head box 10 and hangs outside from the left end portion of the head box 10 via a stopper 26 disposed in the head box 10.

  Next, the operation unit 14 and the operation case 28 will be described in detail.

  The operation portion 14 is partially exposed from an external gear 30 connected to one end portion of the rotary shaft 12 so as to rotate integrally with the opening portion 28a provided on the front surface of the operation case 28, and can be rotated from the outside. It comprises a dial 32 and a spring 34.

  The external gear 30 has a main body 30a having outer teeth 30c formed on the outer peripheral surface thereof, and a plurality of support pieces 30b extending from the main body 30a toward the head box 10. The inside of the main body 30a is a through-hole having a non-circular cross-sectional shape that matches the non-circular cross-sectional shape of the rotary shaft 12, so that the rotary shaft 12 is inserted and the rotary shaft 12 and the external gear 30 rotate integrally. It has become. Each support piece 30b has an arcuate cross section, and the free end of the support piece 30b is an engaging claw 30d swelled in the outer diameter direction. A convex portion 30e is formed at the center of the main body 30a on the side opposite to the head box 10.

  The operation dial 32 is larger in diameter than the external gear 30 and has a cylindrical shape with one end closed. A knurling is engraved on the outer peripheral surface of the operation dial 32 so as to facilitate rotation. Are formed with internal teeth 32 a that mesh with the external teeth 30 c of the external gear 30. Further, the support shaft 32b protrudes from the inner center portion of the closing surface toward the head box 10, and the support shaft 32c protrudes coaxially with the support shaft 32b from the outer center portion of the closing surface and toward the side opposite to the head box 10. Yes. Further, an annular protrusion 32d is formed around the support shaft 32c on the outside of the closed surface.

  The spring 34 is wound around the outer periphery of the plurality of support pieces 30 b of the external gear 30.

  The operation case 28 includes a fixed portion 36 that is fitted and fixed to one end portion of the head box 10, and a cover portion 38 that is attached to the fixed portion 36.

  The fixed portion 36 is provided with an external gear support hole 36a through which the rotary shaft 12 penetrates and supports the external gear 30, and at least two positions symmetrically before and after the blind around the axis of the external gear support hole 36a. The operation dial support holes 36b and 36c for supporting the operation dial 32 parallel to the external gear support hole 36a are formed. The external gear support hole 36a has a large diameter portion 36d and a small diameter portion 36e.

  A concave portion 38a is formed in a relatively wide range on the side facing the fixed portion 36 of the cover portion 38, and further, a position facing the operation dial support holes 36b and 36c of the fixed portion 36 inside the concave portion 38a. Concave portions 38b and 38c are respectively formed in the upper and lower portions. The cover portion 38 is attached to the locked portions 36f and 36g of the fixed portion 36 by a plurality of locking portions 38d and 38e.

  A gap is provided between the fixed portion 36 and the cover portion 38 in a state where the cover portion 38 is attached to the fixed portion 36, and this gap opens the openings 28 a and 28 b on the front and rear surfaces of the operation case 28. Each is defined.

  In a state where the operation portion 14 is accommodated in the operation case 28, the support piece 30b of the external gear 30 and a part of the main body 30a in the axial direction are inserted into the external gear support hole 36a. The support piece 30b passes through the small-diameter portion 36e of the external gear support hole 36a, and the engagement claw 30d at the free end thereof can be locked around the external gear support hole 36a. It is prevented from coming off from the gear support hole 36 a and is restrained so as to be rotatable with respect to the fixed portion 36.

  The spring 34 is inserted between a main body 30a and a step portion formed at the boundary between the large diameter portion 36d and the small diameter portion 36e.

  Further, the support shaft 32b of the operation dial 32 is inserted into either one of the operation dial support holes 36b and 36c. When the operation unit 14 for the right operation is used, as shown in FIG. 5, the support shaft 32b of the operation dial 32 is inserted into the left operation dial support hole 36b that is positioned in front of the external gear support hole 36a. The Similarly, the support shaft 32c of the operation dial 32 is inserted into the recess 38b of the cover 38 facing the operation dial support hole 36b, and the operation dial 32 is rotatably supported by the operation case 28. The operation dial 32 is offset from the axis of the external gear 30 and the rotary shaft 12, and the main body 30 a of the external gear 30 is disposed inside the operation dial 32, and the external teeth 30 c of the external gear 30 and the operation dial 32 are arranged. The inner teeth 32a mesh with each other. Since the operation dial 32 is offset forward, the front side which is a part of the operation dial 32 protrudes from the opening 28a of the operation case 28 to the front surface and is exposed. Thereby, the operation dial 32 can be operated from the front side in a state where the operation unit 14 is disposed at the right end of the head box 10 and the operation case 28 is provided at the right end of the head box 10.

  Further, the external gear 30 is pressed to the side opposite to the head box 10 by the spring 34, and the convex portion 30e contacts the closing surface of the operation dial 32 to press the operation dial 32 toward the side opposite to the head box 10. The protrusion 32d of the operation dial 32 comes into elastic contact with the cover 38.

  In the blind configured as described above, when the operation dial 32 exposed from the opening 28a of the operation case 28 is rotated, the external teeth 30c mesh with the internal teeth 32a as the internal teeth 32a of the operation dial 32 rotate. Therefore, the external gear 30 also rotates in the same direction as the operation dial 32. As a result, the rotary shaft 12 rotates integrally with the external gear 30, and the rotary drum 16 rotates in the same direction as the operation dial 32, so that one of the ladder cords 18 is wound and the other is unwound, and the slat 20 Rotates.

  On the other hand, by rotating the operation dial 32 in the direction opposite to the above, the external gear 30, the rotary shaft 12 and the rotary drum 16 rotate in the direction opposite to the above, so that one of the ladder cords 18 is unwound, The other is wound and the slat 20 rotates in the opposite direction.

  6 to 8 represent a blind according to the invention configured for left operation.

  That is, in the case of the left operation portion 14, as shown in FIG. 8, the support shaft 32b of the operation dial 32 is inserted into the right operation dial support hole 36c that is positioned in front of the external gear support hole 36a. Inserted. Similarly, the support shaft 32c of the operation dial 32 is inserted into the recess 38c of the cover 38 facing the operation dial support hole 36c. As a result, as shown in FIG. 6, the operation unit 14 is disposed at the left end portion of the head box 10 and the operation case 28 is provided at the left end portion of the head box 10 and is a part of the operation dial 32. Since the front side protrudes from the opening 28b of the operation case 28 and is exposed, the operation dial 32 can be operated from the front side. Therefore, the method of rotating the slat 20 is the same as that for the right operation.

  Thus, since the operation dial 32 is attached by being offset in the front-rear direction of the operation case 28 with respect to the axis of the rotary shaft 12, the operation dial 32 can be largely exposed from the openings 28a and 28b. Can be bigger. Therefore, it is not necessary to provide recesses on the left and right sides of the openings 28a and 28b of the operation case 28, and the operation dial 32 can be easily operated while keeping the size of the operation case 28 in the width direction of the blind small. . Therefore, even when the width of the opening where the blind is set is small, the blind can be suitably attached. Since the main body 30a of the external gear 30 is almost contained within the operation dial 32, the operation unit 14 can be made smaller.

  Further, the operation unit 14 is used for the right operation and the left operation, depending on whether the operation dial 32 is attached to the left or right operation dial support hole 36b or 36c and the recess 38b or 38c with the external gear support hole 36a as the center. Since the attachment position to the operation case 28 can be changed, the common parts can be shared.

  Therefore, by changing the attachment position of the operation case 28 and the operation unit 14 to the head box 10, the operation position of the operation unit 14 can be changed to either the left or right of the blind according to the preference of the operator. It can easily cope with left / right switching of the operation position.

  Further, since rotation is transmitted from the inner teeth 32a of the large-diameter operation dial 32 to the small-diameter outer teeth 30c, a rotation difference is generated between the two, and the slat 20 can be rotated with a small operation amount.

  In the above embodiment, the operation dial 32 always protrudes and is exposed from the front surface of the operation case 28. However, the present invention is not limited to this, and the operation dial 32 can be exposed and protruded from any direction that is easy to operate. is there.

DESCRIPTION OF SYMBOLS 10 Head box 12 Rotating shaft 14 Operation part 18 Ladder cord 20 Slat 28 Operation case 30 External gear 32 Operation dial 32a Internal tooth

Claims (2)

An operating portion (14) provided at one end of the head box (10), a rotary shaft (12) rotatably supported in the head box (10) and rotatable by the operating portion (14); A plurality of ladder cords (18) suspended from the head box (10) and tilted in conjunction with the rotation of the rotary shaft (12), and a number of slats (20) supported in alignment by the ladder cord (18) And in a blind with
An operation case (28) for accommodating the operation unit (14) is provided at one end of the head box (10), and the operation unit (14) is connected to one end of the rotating shaft (12) so as to rotate integrally. An external gear (30), and an operation dial (32) rotatably supported at a support position offset from the axis of the rotary shaft (12), and an inner periphery of the operation dial (32) An internal tooth (32a) is formed, and the operation dial (32) can transmit rotation in the same direction as the operation dial (32) to the external gear (30) via the internal tooth (32a). A part of 32) protrudes from the operation case (28) and is exposed, and the operation dial (32) can be rotated from the outside. The operation dial (32) can be supported at any one of at least two support positions symmetrically provided before and after the blind around the rotation axis (12) in the operation case (28). 2. The blind according to claim 1, wherein a part of the operation dial is exposed from either the front surface or the rear surface of the operation case according to the support position.

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