JP2008230306A - Light shielding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve driving force transmission efficiency, and to enhance start-up performance of a link mechanism. <P>SOLUTION: At start-up in developing a screen 12, a lower link 46 and an upper link 48 are displaced once from a first mode of θ1=θ2 to a second mode of θ2>θ1, and then, rotated in a direction developing the screen 12. Accordingly, at start-up of the lower link 46 and the upper link 48, an angle θ2 formed by an imaginary line L1 and the upper link 48 becomes larger than an angle θ1 formed by the imaginary line L1 and the lower link 46, therefore, the driving force transmission efficiency from the lower link 46 to the upper link 48 can be improved. Thus, the start-up performance of the link mechanism 16 with the lower link 46 and the upper link 48 can be enhanced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a light shielding device, and more particularly, to a light shielding device configured to unfold a screen with the operation of a link mechanism.

Conventionally, as this kind of light shielding device, for example, the following is known (for example, see Patent Document 1). In the example described in Patent Document 1, a pair of left and right link arms each provided with an upper arm and a lower arm are provided, and the pair of link arms are actuated by receiving the spring force of the unfolding spring unit, thereby causing a screen. Has been expanded.
Japanese Patent Laid-Open No. 2001-311375 (FIG. 1)

  However, this type of light-shielding device having a link mechanism having an upper arm and a lower arm is configured to be activated from a state in which the upper arm and the lower arm are folded. For this reason, when the link mechanism is started, the driving force transmission efficiency from the lower arm to the upper arm is lowered, and the startability of the link mechanism may be deteriorated. Therefore, there is room for improvement in order to improve the startability of the link mechanism.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a light shielding device capable of improving the startability of the link mechanism.

  In order to solve the above-described problem, the light shielding device according to claim 1 includes a driving unit that generates a driving force, a first link that is rotated by receiving the driving force of the driving unit, and the first link. A second link that is pivotally connected via a pivot shaft, a sheet-like screen that is developed as the first link and the second link pivot, and a width direction of the screen. When the angle formed between the imaginary line passing through the rotating shaft and the first link is θ1, and the angle formed between the imaginary line and the second link is θ2, the first link and the first link And permitting means for allowing the two links to be displaced from the first mode in which θ1 = θ2 to the second mode in which θ2> θ1, and when unfolding the screen, the first link and the second link Two links from the first aspect to the second aspect Characterized by comprising a control means for controlling said drive means so as to be rotated in a direction to expand the screen from the second embodiment after being position.

  In the light shielding device according to claim 1, when the driving source generates driving force, the first link is rotated by receiving the driving force of the driving source, and when the first link is rotated, the first link is rotated. And the second link connected via the rotation shaft portion is rotated. And a sheet-like screen is developed with rotation of this 1st link and the 2nd link.

  By the way, in the light-shielding device configured to expand the screen with the operation of this type of link mechanism, it is necessary to improve the startability of the link mechanism in order to stably expand the screen.

  In this respect, in the light shielding device according to claim 1, an angle formed between the imaginary line passing through the rotation shaft portion and parallel to the width direction of the screen and the first link is θ1, and the imaginary line and the second link are formed. When the angle is θ2, the first link and the second link are in the first mode in which θ1 = θ2 when in the normal stop state.

  On the other hand, at the time of activation when the screen is developed, more specifically, the control unit controls the driving unit, whereby the first link and the second link are operated as follows. That is, the first link and the second link are temporarily displaced from the first mode in which θ1 = θ2 to the second mode in which θ2> θ1. At this time, the displacement of the first link and the second link from the first mode to the second mode is permitted by the permission means. And a 1st link and a 2nd link are rotated in the direction which expand | deploys a screen from the 2nd aspect which becomes (theta) 2> (theta) 1.

  As described above, according to the light shielding device of the first aspect, at the time of starting up when the screen is expanded, the first link and the second link are temporarily set to θ2> θ1 from the first mode in which θ1 = θ2. It is displaced to become the 2nd mode which becomes, and is rotated in the direction which develops a screen after this. Therefore, when the first link and the second link are activated, the angle θ2 formed by the virtual line and the second link is larger than the angle θ1 formed by the virtual line and the first link. The driving force transmission efficiency from the link to the second link can be improved. Thereby, the startability of the link mechanism having the first link and the second link can be improved.

  The light-shielding device according to claim 2 is the light-shielding device according to claim 1, wherein the first link and the second link are in the first mode when the screen is in the housed state. When in the first mode, the rotary shaft portion and each rotary end portion on the opposite side in the longitudinal direction are in a folded posture, and the control means is configured to unfold the screen from the stored state. Controlling the driving means so that the first link and the second link are rotated from the second mode to the second mode after being displaced from the first mode to the second mode. It is characterized by.

  According to the light shielding device of the second aspect, the first link and the second link are folded in such a manner that the rotating shaft portion and the rotating end portions on the opposite side in the longitudinal direction are brought close to each other when the screen is in the stored state. A tatami posture is assumed. However, at the time of startup when the screen is expanded from the storage state, as described above, the first link and the second link are changed from the first mode in which θ1 = θ2 to the second mode in which θ2> θ1. It is displaced, and after that, it is rotated in the direction of developing the screen. Therefore, the startability of the link mechanism can be improved even when starting up when the screen is unfolded from the stored state.

  The light-shielding device according to claim 3 is the light-shielding device according to claim 1 or 2, wherein the first link and the second link are provided on both sides in the width direction of the screen, and the permission means is The screen extends along the widthwise edge of the unfolded side of the screen, and both sides of the widthwise direction are rotatably connected to the second link, and are configured to have flexibility. It is comprised by the screen support member which supports the width direction edge part.

  According to the light-shielding device of the third aspect, the screen support member is provided at the width direction edge portion on the development side of the screen, and both sides of the screen support member rotate in the width direction with the second link. It is movably connected and is configured to be flexible. Therefore, at the time of starting up when the screen is deployed, the screen support member is bent by receiving an external force, so that the displacement of the first link and the second link from the first mode to the second mode can be allowed. .

  The light-shielding device according to claim 4 is the light-shielding device according to claim 3, wherein the first link and the second link are rotated from the first mode to the side displaced from the first mode. In addition, there is provided a restricting means for restricting the movement of the screen support member.

  According to the light-shielding device of the fourth aspect, when the first link and the second link are rotated to the side displaced from the first mode to the second mode, the movement of the screen support member is regulated by the regulating means. The Therefore, by restricting the movement of the screen support member by this restricting means, the screen support member can be bent by applying an external force to the screen support member.

  In order to solve the above-mentioned problem, the light-shielding device according to claim 5 includes a driving unit that generates a driving force, a pair of first links that are rotated by receiving the driving force of the driving unit, A pair of second links coupled to a pair of first links via a pivot shaft, respectively, and a sheet-like screen that is deployed as the first link and the second link rotate. And extending along the widthwise edge of the unfolded side of the screen, and both sides of the widthwise direction are rotatably connected to the second link, and are flexible. It is characterized by comprising a screen support member for supporting the width direction edge portion, and a restricting means for restricting movement of the screen support member in a direction opposite to the developing direction of the screen.

  In the light-shielding device according to claim 5, when the driving source generates a driving force, the first link is rotated by receiving the driving force of the driving source, and when the first link is rotated, the first link is rotated. And the second link connected via the rotation shaft portion is rotated. And a sheet-like screen is developed with rotation of this 1st link and the 2nd link.

  By the way, in the light shielding device configured to expand the screen with the operation of this type of link mechanism, it is necessary to improve the startability of the link mechanism in order to stably expand the screen.

  In this respect, in the light-shielding device according to claim 5, the angle formed by the imaginary line passing through the rotation shaft portion and parallel to the width direction of the screen and the first link is θ1, and the imaginary line and the second link are formed. When the angle is θ2, the first link and the second link are in the first mode in which θ1 = θ2 when in the normal stop state.

  On the other hand, for example, at the time of activation when the screen is expanded, the first link and the second link can be operated as follows, for example. That is, the first link and the second link are temporarily displaced from the first mode in which θ1 = θ2 to the second mode in which θ2> θ1. At this time, the displacement of the first link and the second link from the first mode to the second mode is allowed by the screen support member being bent by the restricting means. And the 1st link and the 2nd link are rotated in the direction which develops a screen from the 2nd mode which becomes theta2> theta1.

  In this way, when the first link and the second link are activated, the angle θ2 formed by the virtual line and the second link is greater than the angle θ1 formed by the virtual line and the first link. Therefore, the driving force transmission efficiency from the first link to the second link can be improved. Thereby, the startability of the link mechanism having the first link and the second link can be improved.

  First, the configuration of the light shielding device 10 according to an embodiment of the present invention will be described.

  FIG. 1 is a perspective view showing the overall configuration of a light shielding device 10 according to an embodiment of the present invention, FIG. 2 is a front view showing the overall configuration of the light shielding device 10, and FIG. The principal part expanded sectional view of each is shown. 1 shows a state when the screen 12 is in the middle of deployment, and FIGS. 2 and 3 show a state when the screen 12 is wound around and stored in the winding member 26. FIG. Has been.

  A light shielding device 10 according to an embodiment of the present invention is mounted on a vehicle in order to shield a rear glass of, for example, a passenger car, and as shown in FIGS. A winding mechanism 14, a link mechanism 16, a base member 18, a drive mechanism 20, and a controller 22 as a control means are provided as main components.

  The screen 12 is made of, for example, a cloth material having a light shielding property, and is formed in a sheet shape. One end of the screen 12 is fixed to a winding member 26 described later. A screen support member 24 is provided on the widthwise edge portion 12A on the development side of the screen 12 as a flexible allowing means. The screen support member 24 is provided along the longitudinal direction of the width direction edge portion 12 </ b> A of the screen 12, and the screen 12 is expanded in the width direction by the width direction edge portion 12 </ b> A being supported by the screen support member 24. Maintained.

  As illustrated in FIG. 3, the winding mechanism 14 includes a winding member 26, a coil spring 28, and a cover member 30. The winding member 26 is for winding the screen 12, and is formed in a longitudinal cylindrical shape. Holder caps 32 and 34 are integrally fitted to both ends of the winding member 26, and shafts 36 and 38 are rotatably held by the holder caps 32 and 34, respectively. The shafts 36 and 38 are integrally fixed to a stay 40 provided on the base member 18 (see FIG. 1). With this configuration, the winding member 26 is rotatable with respect to the base member 18 described later.

  The coil spring 28 is disposed inside the winding member 26 with one shaft 36 inserted therein. The coil spring 28 has one end 28 </ b> A fixed to the shaft 36 and the other end 28 </ b> B fixed to the holder cap 32. The coil spring 28 is radially expanded when the screen 12 is deployed from the winding member 26, and biases the winding member 26 in the direction in which the screen 12 is wound by the torsional force.

  The cover member 30 (silencer) serves to prevent interference between the coil spring 28 and the winding member 26, and is configured in a tube shape (cylindrical shape). The cover member 30 has a coil spring 28 disposed therein and is disposed inside the winding member 26.

  As shown in FIGS. 1 and 2, the link mechanism 16 includes a link rod 42, a lever 44, a lower link 46 as a first link, and an upper link 48 as a second link. ing. Each link rod 42 has one end rotatably connected to each rotation end of a link lever 58 described later, and the other end rotatably connected to each rotation end of each lever 44.

  Each lever 44 is rotatably connected to both ends of the base member 18, and each lower link 46 is integrally fixed to the rotation shaft of each lever 44 and rotated together with each lever 44. It has become so. Each upper link 48 is connected to a rotating end of each lower link 46 via an intermediate joint 50 as a rotating shaft portion, and the rotating end can be rotated to both ends of the screen support member 24 described above. It is connected to.

  The base member 18 is provided along the longitudinal direction of the winding member 26 described above. Assist springs 52 (balance springs) are provided on both ends of the base member 18, respectively. One end of each assist spring 52 is locked to the base member 18, and the other end is locked to the rotation end of each lever 44. Each assist spring 52 urges the lever 44 in the direction in which the screen 12 is deployed (in the direction of arrow R3 in FIG. 1).

  Further, in the base member 18, the position in the vicinity of the rotation axis of each lower link 46 is configured as a movement restricting portion 54 (corresponding to a restricting means). As will be described in detail later, when the screen 12 is wound around and stored in the winding member 26 as shown in FIG. 2, the movement restricting portion 54 has both ends of the screen support member 24 provided on the screen 12. It plays a role of regulating movement in the direction opposite to the unfolding direction of the side screen 12 (that is, the direction of arrow A in FIG. 2).

  The drive mechanism 20 includes a drive motor 56 as a drive means, a link lever 58, and a support member 60, and is disposed at the center of the base member 18. The drive motor 56 is fixed to the base member 18 by a support member 60, and the link lever 58 is rotatably supported by the support member 60. The link lever 58 is connected to the output shaft 62 of the drive motor 56 and is rotated together with the output shaft 62 of the drive motor 56.

  For example, the controller 22 includes an electric circuit on which a CPU, a ROM, a RAM, and the like are mounted, and is configured to input a control signal output from an external control device and control the drive motor 56. ing. The operation of the controller 22 will be described together with the following actions and effects.

  Next, the operation and effect of the light shielding device 10 according to one embodiment of the present invention will be described.

  First, the outline of the operation of the light shielding device 10 according to an embodiment of the present invention will be described. The drive motor 56 shown in FIG. 1 inputs a control signal (normal rotation signal) from the controller 22 to perform normal rotation, and the link When the lever 58 is rotated in the R1 direction, the lever 44 connected to the link lever 58 via the link rod 42 is rotated in the R3 direction. Further, when the lever 44 is rotated in the R3 direction, the lower link 46 fixed to the lever 44 is rotated in the R5 direction, and the upper link 48 connected to the lower link 46 via the intermediate joint 50 is formed. It is rotated in the R7 direction. Then, with the operation of the lower link 46 and the upper link 48, the screen 12 is pulled upward, whereby the screen 12 is deployed from the winding member 26.

  At this time, the coil spring 28 disposed inside the winding member 26 is expanded in the radial direction when the screen 12 is deployed from the winding member 26, and the winding member 26 is moved to the screen 12 by the twisting force. Is energized in the direction of winding. Accordingly, the slack of the screen 12 is prevented and the screen 12 is expanded. Then, when the lower link 46 and the upper link 48 are rotated so that the lower link 46 and the upper link 48 are linear along the vertical direction, the link mechanism 16 is in the extended posture. In addition, when the link mechanism 16 is in the extended posture, the screen 12 is in an unfolded state that covers the entire rear glass of the vehicle, for example.

  On the other hand, when the drive motor 56 is reversed by inputting a control signal (inverted signal) from the controller 22 and the link lever 58 is rotated in the R2 direction, the link lever 58 and the link rod 42 are connected. The lever 44 is rotated in the R4 direction. When the lever 44 is rotated in the R4 direction, the lower link 46 fixed to the lever 44 is rotated in the R6 direction, and the upper link 48 connected to the lower link 46 via the intermediate joint 50 is formed. It is rotated in the R8 direction.

  At this time, the winding member 26 is rotated in the direction of winding the screen 12 by the torsional force of the coil spring 28, so that the screen 12 is wound around the winding member 26. As shown in FIG. 2, when the lower link 46 and the upper link 48 are rotated and the lower link 46 and the upper link 48 overlap each other in the substantially horizontal direction, the link mechanism 16 is in the folded posture. Is done. Further, when the link mechanism 16 is in the folded posture, the screen 12 is brought into a storage state in which the screen 12 is completely wound around the winding member 26.

  By the way, in the light-shielding device 10 configured to deploy the screen 12 with the operation of this type of link mechanism 16, the screen 12 wound around the winding member 26 and housed is stably deployed. Therefore, it is necessary to improve the startability of the link mechanism 16.

  In this regard, in the light shielding device 10 according to the embodiment of the present invention, as shown in FIG. 4, the angle formed between the imaginary line L1 passing through the intermediate joint 50 and the lower link 46 is parallel to the width direction of the screen 12. When θ1 is set and the angle formed by the virtual line L1 and the upper link 48 is θ2, the lower link 46 and the upper link 48 are θ1 = θ2 when the screen 12 is in the normal stop state in which the screen 12 is stored. The first aspect is used.

  On the other hand, more specifically, the controller 22 controls the drive motor 56 as follows at the time of startup when the screen 12 is unfolded. That is, the controller 22 outputs an inversion signal to the drive motor 56 to invert the drive motor 56, and then outputs a normal rotation signal to the drive motor 56 to cause the drive motor 56 to perform normal rotation.

  As a result, the lower link 46 and the upper link 48 are operated as follows. That is, the lower link 46 and the upper link 48 are respectively rotated in the R6 direction and the R8 direction in accordance with the reversal of the drive motor 56, and from the first mode in which θ1 = θ2 shown in FIG. It is displaced to the second mode where θ2> θ1 shown in FIG.

  At this time, as the upper link 48 rotates, both ends of the screen support member 24 try to move in the direction opposite to the direction in which the screen 12 is deployed (that is, in the direction of arrow A in FIG. 5). This movement is restricted by the movement restricting portion 54 (see FIG. 2) of the base member 18. As a result, the screen support member 24 receives a load (see an arrow F in FIG. 5) in the width direction, and the screen support member 24 is bent. In the present embodiment, when the screen support member 24 is bent in this manner, the displacement of the lower link 46 and the upper link 48 from the first mode (see FIG. 4) to the second mode (see FIG. 5). Is acceptable.

  Then, the lower link 46 and the upper link 48 develop the screen 12 shown in FIG. 6 from the second mode in which θ2> θ1 shown in FIG. It is rotated in the (R5 direction and R7 direction).

  Thus, according to the light-shielding device 10 according to an embodiment of the present invention, at the time of activation when the screen 12 is deployed, the lower link 46 and the upper link 48 are temporarily changed from the first mode in which θ1 = θ2. It is displaced to the second mode in which θ2> θ1, and then rotated in the direction in which the screen 12 is developed. Therefore, when the lower link 46 and the upper link 48 are activated, the angle θ2 formed by the virtual line L1 and the upper link 48 is larger than the angle θ1 formed by the virtual line L1 and the lower link 46 ( The driving force transmission efficiency from the lower link 46 to the upper link 48 can be improved. Thereby, the startability of the link mechanism 16 having the lower link 46 and the upper link 48 can be improved.

  In particular, according to the light-shielding device 10 according to an embodiment of the present invention, when the screen 12 is in the retracted state, the lower link 46 and the upper link 48 are connected to the intermediate joint 50 and the rotation ends on the opposite side in the longitudinal direction. The folding postures are close to each other (see FIG. 2). However, at the time of startup when the screen 12 is deployed from the stored state, as described above, the lower link 46 and the upper link 48 are temporarily changed from the first mode in which θ1 = θ2 to the second mode in which θ2> θ1. After that, the screen 12 is rotated in the direction of unfolding. Therefore, the startability of the link mechanism 16 can be improved even when starting up when the screen 12 is deployed from the stored state.

  Moreover, according to the light-shielding device 10 according to an embodiment of the present invention, since a simple program is only added to the controller 22, the startability of the link mechanism 16 is improved without causing an increase in manufacturing cost. Can do.

  Next, a modified example of the light shielding device 10 according to an embodiment of the present invention will be described.

  In the above embodiment, the flexible screen support member 24 is used to allow the displacement of the lower link 46 and the upper link 48 from the first mode to the second mode, but a configuration other than the screen support member 24 is used. The lower link 46 and the upper link 48 may be configured to be allowed to be displaced from the first mode to the second mode.

  In the above embodiment, the base member 18 is provided with the movement restricting portion 54 for restricting the movement of the screen support member 24 in the direction opposite to the deployment direction of the screen 12. It may be provided on a member other than the member 18.

It is a perspective view showing the whole light shielding device composition concerning one embodiment of the present invention. It is a front view which shows the whole structure of the light-shielding apparatus which concerns on one Embodiment of this invention. It is a principal part expanded sectional view of the light-shielding apparatus which concerns on one Embodiment of this invention. It is operation | movement explanatory drawing of the light-shielding apparatus which concerns on one Embodiment of this invention. It is operation | movement explanatory drawing of the light-shielding apparatus which concerns on one Embodiment of this invention. It is operation | movement explanatory drawing of the light-shielding apparatus which concerns on one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Light-shielding device, 12 ... Screen, 12A ... Width direction edge part, 14 ... Winding mechanism, 16 ... Link mechanism, 18 ... Base member, 20 ... Drive mechanism, 22 ... Controller (control means), 24 ... Screen support member (Allowing means), 26 ... winding member, 28 ... coil spring, 30 ... cover member, 32, 34 ... holder cap, 36, 38 ... shaft, 40 ... stay, 42 ... link rod, 44 ... lever, 46 ... lower Link (first link), 48 ... upper link (second link), 50 ... intermediate joint (rotating shaft), 52 ... assist spring, 54 ... movement restricting portion (regulating means), 56 ... drive motor (driving means) 58 ... Link lever, 60 ... Support member, 62 ... Output shaft

Claims (5)

Driving means for generating a driving force;
A first link rotated by receiving a driving force of the driving means;
A second link rotatably connected to the first link via a rotation shaft portion;
A sheet-like screen that is developed along with the rotation of the first link and the second link;
When the angle formed between the imaginary line passing through the rotating shaft and the first link parallel to the width direction of the screen and the first link is θ1, and the angle formed between the imaginary line and the second link is θ2, Permitting means for allowing the first link and the second link to be displaced from the first mode in which θ1 = θ2 to the second mode in which θ2>θ1;
When unfolding the screen, the first link and the second link are displaced from the first aspect to the second aspect, and then rotated from the second aspect in the direction of unfolding the screen. Control means for controlling the drive means;
A light-shielding device comprising: The first link and the second link are in the first mode when the screen is in the stowed state, and when the screen is in the first mode, the first link and the second link are on the opposite side of the rotation shaft portion in the longitudinal direction. Each of the rotating ends is in a folded position that is close to each other,
The control means deploys the screen from the second mode after the first link and the second link are displaced from the first mode to the second mode when the screen is deployed from the stored state. The light-shielding device according to claim 1, wherein the driving unit is controlled to rotate in a direction. The first link and the second link are provided on both sides in the width direction of the screen,
The permissive means extends along the widthwise edge of the screen on the developing side, and both widthwise sides of the screen are rotatably connected to the second link, and has flexibility. The light-shielding device according to claim 1, wherein the light-shielding device is configured by a screen support member configured to support the edge in the width direction.   When the first link and the second link are rotated from the first mode to the side displaced from the first mode, a control unit is provided for controlling the movement of the screen support member. The light-shielding device according to claim 3. Driving means for generating a driving force;
A pair of first links rotated by receiving a driving force of the driving means;
A pair of second links coupled to the pair of first links via a pivot shaft, respectively,
A sheet-like screen that is developed along with the rotation of the first link and the second link;
The width of the screen extends along the widthwise edge of the developing side, and both widthwise sides of the screen are rotatably connected to the second link, and are configured to have flexibility. A screen support member for supporting the directional edge;
A restricting means for restricting movement of the screen support member in a direction opposite to the direction of deployment of the screen;
A light-shielding device comprising:

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