JP2015047922A - Shading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shading device which allows a user to operate a screen by hand operation.SOLUTION: A shading device 10 comprises: a drive motor 14; an arm 18 connected to the drive motor 14 via a drive force transmission mechanism 16, and operated by receiving drive force outputted from the drive motor 14; a screen 22 connected to the arm 18 and expanded and stored following the operation of the arm 18; and a clutch mechanism 54 which is disposed between the drive motor 14 and the drive force transmission mechanism 16, and blocks connection between the drive motor 14 and the drive force transmission mechanism 16 when torque exceeds a set torque.

Description

  The present invention relates to a light shielding device.

  2. Description of the Related Art Conventionally, there is a light shielding device that includes a drive motor, an arm connected to the drive motor via a drive force transmission mechanism, and a screen connected to the arm (for example, see Patent Document 1). In this shading device, when the drive motor is driven, the arm is actuated by the driving force of the drive motor, and the screen is unfolded or stored as the arm is actuated.

JP 2010-179699 A

  However, in this light shielding device, the screen is unfolded or stored only when the drive motor is driven. For this reason, for example, there is a disadvantage that the screen cannot be manually operated.

  Therefore, an object of the present invention is to provide a light shielding device capable of manually operating a screen as an example.

  To achieve the above object, a light-shielding device according to claim 1 is provided with a drive motor, an arm connected to the drive motor via a drive force transmission mechanism, and operated by receiving the drive force of the drive motor; The drive motor connected to the arm and provided between the drive motor and the drive force transmission mechanism is provided between the drive motor and the drive force transmission mechanism, and a screen that is deployed and stored in accordance with the operation of the arm. And a clutch mechanism for cutting off the connection between the driving force transmission mechanism and the driving force transmission mechanism.

  According to this light shielding device, the clutch mechanism is provided between the drive motor and the drive force transmission mechanism, and in this clutch mechanism, power transmission is interrupted when a torque exceeding the set torque is applied. Therefore, for example, when an operation load exceeding a certain level is applied to the screen, the clutch mechanism is disengaged, so that the screen can be operated manually.

  The light-shielding device according to claim 2 is the light-shielding device according to claim 1, wherein the clutch mechanism includes an output member provided on an output shaft of the drive motor, and an engagement member. A driving member having an engaged portion engaged and connected to the driving force transmission mechanism and provided coaxially with the output member, and an elastic member for pressing one of the output member and the driving member to the other side It is set as the structure which has.

  According to the light shielding device, when a torque exceeding the set torque acts on the clutch mechanism, one of the output member and the drive member is separated from the other against the elastic force of the elastic member, and the engaging portion and the engaged portion are engaged. The engagement state of the part is released. Thereby, power transmission between the output member and the drive member can be interrupted.

  The light-shielding device according to claim 3 is the light-shielding device according to claim 2, wherein the driving force transmission mechanism is a link mechanism provided between the driving member and the arm, and the link mechanism is A link rod extending in the horizontal width direction of the screen and connected to a position shifted outward from the rotation center of the drive member, and reciprocating in the horizontal width direction of the screen as the drive member reciprocates. The end of the link rod on the side of the driving member overlaps with the driving member in the horizontal width direction of the screen as the driving member reciprocates and rotates in the horizontal width direction of the screen with respect to the driving member. The link rod is shifted to the driving member side end of the link rod, and the end is overlapped with the driving member in the horizontal width direction of the screen. Curved portions disposed along the outer periphery of the drive member is a formed structure in a state in which up to.

  According to this light shielding device, a curved portion is formed at the end of the link rod on the drive member side, and the curved portion is connected to the drive member in the lateral width direction of the screen. It arrange | positions along the outer periphery of a drive member in the state which overlaps. Therefore, when the end of the link rod on the side of the drive member overlaps the drive member in the horizontal width direction of the screen, the end of the link rod on the side of the drive member is prevented from protruding outward in the radial direction of the drive member. be able to. Thereby, size reduction of a light-shielding apparatus can be achieved.

It is a figure which shows the state which stored the screen in the light-shielding apparatus which concerns on one Embodiment of this invention. It is a figure which shows the state which expand | deployed the screen shown by FIG. It is a principal part enlarged view of the drive motor periphery part in the light-shielding apparatus shown by FIG. FIG. 3 is an enlarged view of a main part around a drive motor in the light shielding device shown in FIG. 2. FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 3 and shows a state where a clutch mechanism is connected. It is a figure which shows the state by which the clutch mechanism shown by FIG. 5 was interrupted | blocked. FIG. 7 is a two-side view of the output gear shown in FIGS. 5 and 6.

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

  A light shielding device 10 according to an embodiment of the present invention shown in FIGS. 1 and 2 is for shielding a rear glass provided in a vehicle such as a passenger car, for example, and includes a base member 12 and a drive motor 14. A driving force transmission mechanism 16, a pair of arms 18, a winding mechanism 20, and a screen 22.

  The base member 12 is constituted by a pipe, and the drive motor 14 is fixed to the central portion in the longitudinal direction of the base member 12. An output plate 24 constituting a clutch mechanism 54 described later is connected to the output shaft of the drive motor 14. The output plate 24 rotates about its longitudinal center.

  The driving force transmission mechanism 16 is a link mechanism having a pair of link rods 26 and a pair of levers 28. The pair of link rods 26 extend in the horizontal width direction (arrow W direction) of the screen 22, and are provided side by side in the horizontal width direction of the screen 22. One end portion of each link rod 26 is rotatably connected to both end portions in the longitudinal direction of the output plate 24 (positions shifted outward from the rotation center portion), and the other end portion of each link rod 26 is The lever 28 is pivotally connected to the pivot end of the lever 28. Each lever 28 is extended from the base end part of the lower arm 32 mentioned later.

  Each of the pair of arms 18 includes an upper arm 30 and a lower arm 32. The base end portion of each upper arm 30 is rotatably connected to the tip end portion of the lower arm 32 via a joint 34, and the tip end portion of each upper arm 30 is connected to both longitudinal ends of a screen support member 44 described later, respectively. It is connected so that it can rotate. Further, the base end portion of each lower arm 32 is rotatably supported by first brackets 36 provided on both ends in the longitudinal direction of the base member 12.

  The winding mechanism 20 is fixed to a pair of second brackets 38 provided together with the first bracket 36 on both ends in the longitudinal direction of the base member 12. The winding mechanism 20 includes a support shaft 40, a winding member 42 that is rotatably supported by the support shaft 40 and winds up the screen 22, and a rotation direction of the winding member 42 with respect to the support shaft 40. It has a spring (not shown) or the like that biases it.

  The screen 22 is formed of a trapezoidal sheet material having a light shielding property. An end portion on the base end side of the screen 22 is fixed to a winding member 42, and a screen support member 44 is provided at an end portion on the development side of the screen 22. The screen support member 44 is provided along an end portion of the screen 22 on the development side, and supports the screen 22 in a state where the screen 22 is expanded in the horizontal width direction.

  And as FIG. 2 shows, this light-shielding apparatus 10 operate | moves as follows. That is, when the drive motor 14 rotates forward and the output plate 24 rotates in the R1 direction, the pair of link rods 26 slides inward in the horizontal width direction of the screen 22, and each lever 28 rotates in the R3 direction. Is done. When each lever 28 is rotated in the R3 direction, each lower arm 32 is rotated in the R5 direction, the upper arm 30 is rotated in the R7 direction, the screen 22 is pulled upward, and the screen 22 is It is pulled out from the winding mechanism 20.

  At this time, the screen 22 is pulled by the winding mechanism 20 in the winding direction. Therefore, the screen 22 is always stretched in a tensioned state. Further, an assist spring 46 is provided between the distal end side of the lever 28 and the base member 12, and an assist force is applied to the lower arm 32 in the R5 direction by the assist spring 46. When the pair of arms 18 are actuated until receiving a driving force of the driving motor 14 and extending in a straight line, the screen 22 is unfolded.

  On the other hand, when the drive motor 14 is reversed from the state in which the screen 22 is deployed and the output plate 24 is rotated in the R2 direction, the pair of link rods 26 slides outward in the lateral width direction of the screen 22, and each lever 28 is rotated in the R4 direction. When each lever 28 is rotated in the R4 direction, each lower arm 32 is rotated in the R6 direction, and each upper arm 30 is rotated in the R8 direction. When the pair of arms 18 are actuated until they are bent by receiving the driving force of the drive motor 14, the screen 22 is wound and stored in the winding mechanism 20 (see FIG. 1).

  Next, the characteristic part of the light-shielding apparatus 10 which concerns on one Embodiment of this invention is demonstrated in detail.

  As shown in FIGS. 3 and 4, the drive motor 14 has a motor main body 48, a worm 50 provided on the rotation shaft of the motor main body 48, and a worm wheel 52 meshed with the worm 50. ing. A clutch mechanism 54 is provided between the drive motor 14 and the output plate 24. As shown in FIGS. 5 and 6, the clutch mechanism 54 includes an output gear 56, which is an example of an output member, a cover plate 58, and an elastic member, in addition to the output plate 24, which is an example of the drive member described above. The coil spring 60 is an example.

  The output gear 56 is integrally formed on a surface on one side in the axial direction of the worm wheel 52 described above. The output gear 56 is provided coaxially with the worm wheel 52 and is fixed to the output shaft 62 of the drive motor 14 together with the worm wheel 52. The drive motor 14 is provided with a motor bracket 64, and the output gear 56 is inserted into a hole 66 formed in the motor bracket 64. On one side of the output gear 56 in the axial direction, a plurality of engaging portions 68 having a triangular shape as viewed in the radial direction of the output gear 56 are formed. The plurality of engaging portions 68 are annularly arranged along the circumferential direction of the output gear 56 (see FIG. 7).

  The output plate 24 is provided coaxially with the output gear 56 on one axial side of the output gear 56. On the output gear 56 side of the output plate 24, a plurality of engaged portions 70 having a triangular shape as viewed in the radial direction of the output plate 24 are formed. The plurality of engaged portions 70 are annularly arranged around the rotation center portion of the output plate 24, similarly to the plurality of engaging portions 68 described above. Further, the output plate 24 can move together with the link rod 26 to the side opposite to the output gear 56 side.

  The cover plate 58 has a pair of leg portions 72 erected with respect to the motor bracket 64 and a connecting portion 74 that connects the upper ends of the pair of leg portions 72. The connecting portion 74 is located on the side opposite to the output gear 56 side with respect to the output plate 24. The connecting portion 74 is formed with a circular convex portion 76 in a plan view protruding toward the output plate 24 side. Similarly, the output plate 24 is formed with a circular convex portion 78 in a plan view that protrudes toward the connecting portion 74. The pair of convex portions 76 and 78 are provided coaxially with the output plate 24 and the output gear 56.

  The coil spring 60 is interposed between the output plate 24 and the connecting portion 74. One end portion of the coil spring 60 in the axial direction is engaged with the convex portion 76 of the connecting portion 74, and the other end portion of the coil spring 60 in the axial direction is engaged with the convex portion 78 of the output plate 24. .

  The coil spring 60 is interposed between the output plate 24 and the connecting portion 74 in a compressed state or a free state. As shown in FIG. 5, the output plate 24 is pressed toward the output gear 56 by the coil spring 60, whereby the plurality of engaging portions 68 and the plurality of engaged portions 70 are normally engaged with each other. Are combined.

  In the clutch mechanism 54, for example, when an external force is applied to the above-described screen support member 44 (see FIGS. 1 and 2) or the like, a torque exceeding a preset torque is applied to the output plate 24. The output plate 24 is separated from the output gear 56 against the elastic force of the coil spring 60, and the engagement state between the plurality of engaging portions 68 and the plurality of engaged portions 70 is released.

  Similarly, for example, the drive motor 14 is driven while the screen support member 44 and the arm 18 (see FIGS. 1 and 2) and the like are held, and a torque exceeding the set torque is applied to the output gear 56. Even in this case, the output plate 24 is separated from the output gear 56 against the elastic force of the coil spring 60, and the engagement state between the plurality of engaging portions 68 and the plurality of engaged portions 70 is released. .

  In the clutch mechanism 54, the output plate 24 is separated from the output gear 56 against the elastic force of the coil spring 60 as described above, and the engagement between the plurality of engaging portions 68 and the plurality of engaged portions 70. By canceling the combined state, power transmission is interrupted.

  On the other hand, when the state in which the torque exceeding the set torque is applied to the clutch mechanism 54 is released, the output plate 24 is pressed toward the output gear 56 by the coil spring 60, and the plurality of engaging portions 68 and the plurality of covered parts are again pressed. The engagement portion 70 is engaged, and the clutch mechanism 54 is restored to a state where normal power transmission is possible. As described above, when the clutch mechanism 54 is returned to the state where the power can be transmitted, the drive motor 14 can electrically expand or retract the screen 22 as described above.

  Note that the above-described set torque, which is a threshold value for interrupting power transmission in the clutch mechanism 54, is set by the elastic force of the coil spring 60, the shape of the inclined surfaces of the engaging portion 68 and the engaged portion 70, and the like. . This set torque is set to a value larger than the torque acting on the clutch mechanism 54 when the screen 22 is electrically expanded or stored by the drive motor 14 in the normal operation of the light shielding device 10.

  Further, as described above, the link rod 26 connected to the drive motor 14 via the clutch mechanism 54 is shifted to the outside of the rotation center portion of the output plate 24 (that is, both longitudinal end portions of the output plate 24). ) And is reciprocated in the direction of the arrow W which is the horizontal width direction of the screen 22 as the output plate 24 reciprocates (see FIGS. 1 and 2).

  Here, the end 26A of the link rod 26 on the output plate 24 side overlaps the output plate 24 in the direction of arrow W as the output plate 24 reciprocates (see FIG. 4), and the output plate 24. Is shifted to a state shifted in the arrow W direction (see FIG. 3). Further, a curved portion 80 is formed at an end portion 26A of the link rod 26 on the output plate 24 side.

  As shown in FIG. 4, the bending portion 80 is formed along the outer peripheral edge 24 </ b> A of the output plate 24 in the state where the end portion 26 </ b> A on the output plate 24 side of the link rod 26 overlaps the output plate 24 in the arrow W direction. It is arranged. That is, the outer peripheral edge 24A of the output plate 24 is formed in an arc shape centering on the rotation center portion of the output plate 24, and the curved portion 80 is formed on the outer peripheral edge 24A of the output plate 24 formed in this arc shape. Curved so as to be arranged along.

  Next, the operation and effect of one embodiment of the present invention will be described.

  As described above in detail, according to the light shielding device 10 according to the embodiment of the present invention, the clutch mechanism 54 is provided between the drive motor 14 and the driving force transmission mechanism 16, and this clutch mechanism 54 is provided. Then, when a torque exceeding the set torque acts on one of the output plate 24 and the output gear 56, the power transmission is interrupted. Therefore, for example, when an operation load of a certain level or more is applied to the screen 22, the screen support member 44, etc., the clutch mechanism 54 is disconnected, so that the screen 22 can be manually operated. That is, for example, the screen 22 can be manually displaced from the winding state or the unfolded state to an arbitrary position.

  Further, for example, even when an external force is unexpectedly applied to the screen 22, the screen support member 44, the arm 18, etc., the clutch mechanism 54 is disconnected, so that, for example, the arm 18, the link rod 26, etc. are deformed, or the drive motor 14 can be prevented from being damaged.

  Similarly, even when the drive motor 14 is driven while the screen 22, the screen support member 44, the arm 18 and the like are held, the clutch mechanism 54 is disconnected. Accordingly, even in this case, for example, it is possible to prevent the arm 18 and the link rod 26 and the like from being deformed and the worm 50 and the worm wheel 52 and the like in the drive motor 14 from being damaged.

  By the way, in this shading device 10, when the screen 22 is unfolded as shown in FIG. 2, the end 26A on the output plate 24 side of the link rod 26 is in the lateral width direction of the screen 22, as shown in FIG. It overlaps with the output plate 24 in the direction of arrow W.

  Here, a curved portion 80 is formed at an end portion 26A of the link rod 26 on the output plate 24 side. The curved portion 80 is curved so that the end portion 26A on the output plate 24 side of the link rod 26 is arranged along the outer peripheral edge 24A of the output plate 24 in a state of overlapping the output plate 24 in the arrow W direction. Is formed.

  Therefore, in the state where the end portion 26A on the output plate 24 side of the link rod 26 overlaps the output plate 24 in the arrow W direction, the end portion 26A is prevented from protruding outward in the radial direction of the output plate 24. it can. Thereby, size reduction of the light-shielding apparatus 10 can be achieved.

  Next, a modification of one embodiment of the present invention will be described.

  In the above embodiment, the engaging portion 68 and the engaged portion 70 are each formed in a triangular shape, but may be formed in a shape other than the triangular shape such as a rectangular shape or a round mountain shape. .

  Further, although the output gear 56 is formed integrally with the worm wheel 52, the output gear 56 may be separated from the worm wheel 52 and assembled integrally with the worm wheel 52.

  In the clutch mechanism 54, the output plate 24 is pressed toward the output gear 56 by the coil spring 60. However, for example, the output gear 56 is separated from the worm wheel 52 and the output gear 56 is axially displaceable with respect to the worm wheel 52 and can be moved toward and away from the output plate 24. The output gear 56 may be pressed toward the output plate 24 by an elastic member such as a spring.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

  Next, in addition to the invention described in the claims, the technical idea that can be grasped from the above embodiment will be described below together with the effects thereof.

A drive motor;
A drive member reciprocally rotated by the drive motor;
An arm that is connected to the drive member via a link mechanism and operates by receiving a drive force of the drive motor;
A screen connected to the arm and deployed and stored as the arm operates,
The link mechanism extends in the horizontal width direction of the screen and is connected to a position shifted outward from the rotation center portion of the drive member, and is reciprocated in the horizontal width direction of the screen as the drive member reciprocates. Link rod
The end of the link rod on the drive member side overlaps the drive member in the horizontal width direction of the screen as the drive member reciprocates and in the horizontal width direction of the screen with respect to the drive member. Changed to a shifted state,
The end portion of the link rod on the drive member side is formed with a curved portion that is disposed along the outer peripheral edge of the drive member in a state where the end portion overlaps the drive member in the horizontal width direction of the screen. ing,
Shading device.

  According to this light shielding device, a curved portion is formed at the end of the link rod on the drive member side, and the curved portion is connected to the drive member in the lateral width direction of the screen. It arrange | positions along the outer periphery of a drive member in the state which overlaps. Therefore, when the end of the link rod on the side of the drive member overlaps the drive member in the horizontal width direction of the screen, the end of the link rod on the side of the drive member is prevented from protruding outward in the radial direction of the drive member. be able to. Thereby, size reduction of a light-shielding apparatus can be achieved.

DESCRIPTION OF SYMBOLS 10 ... Light-shielding device, 12 ... Base member, 14 ... Drive motor, 16 ... Drive force transmission mechanism, 18 ... Arm, 20 ... Winding mechanism, 22 ... Screen, 24 ... Output plate (an example of a drive member), 24A ... Outside Periphery, 26 ... Link rod, 26A ... End, 28 ... Lever, 30 ... Upper arm, 32 ... Lower arm, 34 ... Joint, 36 ... First bracket, 38 ... Second bracket, 40 ... Support shaft, 42 ... Winding member 44 ... Screen support member, 46 ... Assist spring, 48 ... Motor body, 50 ... Worm, 52 ... Worm wheel, 54 ... Clutch mechanism, 56 ... Output gear (an example of an output member), 58 ... Cover plate, 60 ... Coil Spring (an example of an elastic member), 62 ... output shaft, 64 ... motor bracket, 66 ... hole, 68 ... engaging portion, 70 ... engaged portion, 72 Legs, 74 ... connecting portion, 76, 78 ... protruding portion, 80 ... curved portion

Claims (3)

A drive motor;
An arm that is connected to the drive motor via a drive force transmission mechanism and operates by receiving the drive force of the drive motor;
A screen connected to the arm and deployed and stored as the arm operates;
A clutch mechanism that is provided between the drive motor and the drive force transmission mechanism and that disconnects the connection between the drive motor and the drive force transmission mechanism when a torque exceeding a set torque is applied;
A light-shielding device. The clutch mechanism is
An output member having an engaging portion and provided on an output shaft of the drive motor;
A driving member having an engaged portion engaged with the engaging portion, coupled to the driving force transmission mechanism, and provided coaxially with the output member;
An elastic member that presses one of the output member and the drive member to the other side;
have,
The light-shielding device according to claim 1. The driving force transmission mechanism is a link mechanism provided between the driving member and the arm,
The link mechanism extends in the horizontal width direction of the screen and is connected to a position shifted outward from the rotation center portion of the drive member, and is reciprocated in the horizontal width direction of the screen as the drive member reciprocates. Link rod
The end of the link rod on the drive member side overlaps the drive member in the horizontal width direction of the screen as the drive member reciprocates and in the horizontal width direction of the screen with respect to the drive member. Changed to a shifted state,
The end portion of the link rod on the drive member side is formed with a curved portion that is disposed along the outer peripheral edge of the drive member in a state where the end portion overlaps the drive member in the horizontal width direction of the screen. ing,
The light-shielding device according to claim 2.

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