JP5117181B2 - Camera blade drive - Google Patents

Description

  The present invention relates to a camera blade driving device that is mounted on a digital camera or the like and drives and positions a blade member such as a barrier blade, a shutter blade, or a diaphragm blade that opens and closes an opening for an optical path.

  Conventional camera blade driving devices include a base plate that defines an opening for an optical path, a shutter blade that is supported so that the opening can be opened and closed with respect to the base plate, and a drive pin that is inserted into a long hole provided in the shutter blade. Actuator (moving magnet type motor) including a rotor having a balance plate that is rotated in the opposite direction to the shutter blade by the movement of the drive pin, and rotating the rotor within a predetermined angular range, A device that attempts to position and hold the shutter blade at a predetermined position by driving the opening and closing and suppressing the impact of the shutter blade by a balance plate is known (for example, see Patent Document 1).

  Other camera blade driving devices are provided on a substrate that defines an opening for an optical path, a pair of interlocking barrier blades that are supported so that the opening can be opened and closed with respect to the substrate, and one barrier blade. And a rotor having a link member that has a slit for receiving the connection pin on one end side and is swingably supported by the substrate, and a drive pin that is inserted into a long hole provided on the other end side of the link member. The actuator (moving magnet type motor), the other barrier blade connected to one barrier blade, a stopper for positioning the pair of barrier blades in the open position, and the like are provided by rotating the rotor within a predetermined angular range. Open and close the barrier blades and use magnetic force to hold the barrier blades in the open position so that the barrier blades do not move freely due to impact, etc. Which it is known (for example, see Patent Document 2).

  However, in these devices, since the center of gravity of the shutter blade or barrier blade is located away from the center of rotation, the inertial force or rotational moment around the center of rotation increases, and the shutter into which the drive pin is inserted The long hole of the blade is simply formed as a straight long hole, and the slit that receives the connecting pin of the barrier blade is formed as a straight notch. Relative movement is likely to occur between the holes or between the connecting pin and the slit, and the shutter blade or the barrier blade held at a predetermined position may move without permission. Further, it is necessary to provide a magnet to hold the balance plate and the barrier blade, which increases the cost.

JP 2007-33602 A JP 2006-284441 A

  The present invention has been made in view of the above circumstances, and the object of the present invention is to provide a blade member even if an impact force is applied due to dropping or the like while simplifying the structure and downsizing the apparatus. Is provided in a predetermined stop position (for example, a closed position for closing the opening or an open position for opening the opening).

A camera blade driving device according to a first aspect of the present invention is inserted into a substrate having an opening, a single blade member supported by the substrate so that the opening can be freely opened and closed, and a long hole of the blade member. A camera blade drive device comprising an interlocking lever having a connecting pin and rotatably supported on a substrate, and an actuator including a driving pin connected to the interlocking lever and rotating a predetermined operating angle. The elongated hole of the blade member is connected to the first inner peripheral edge portion that inscribes the connection pin when the blade member is driven to open and close, and the connection pin when the blade member is positioned at a stop position that closes or opens the opening portion. A second inner peripheral edge that is continuously formed at a different inclination angle from the first inner peripheral edge and extends in a direction substantially perpendicular to the rotation center of the interlocking lever and a straight line passing through the connecting pin ; When moving the blade member to the stop position In order to further overtravel in the same direction, having a third inner peripheral edge portion which is continuously formed at a different inclination angle and the second inner peripheral portion, and characterized in that.
According to this configuration, when the rotor is rotated, the interlocking lever is rotated, the connecting pin is inscribed in the first inner peripheral edge of the elongated hole, and the blade member opens and closes the opening. And when a blade | wing member stops in the stop position which closes or open | releases an opening part, a connection pin is inscribed in the 2nd inner peripheral part of a long hole. Here, since the second inner peripheral edge extends in a direction substantially perpendicular to the straight line passing through the rotation center of the interlocking lever and the connecting pin, the blade member is reversed from the stop position (closed position) by an impact force or the like. The second inner peripheral edge of the long hole provided in the blade member is connected to the connecting pin even if trying to move freely (toward the open position when stopping to the closed position and toward the closed position when stopping to the open position). Pressing toward the rotation center of the interlocking lever prevents relative movement between the connecting pin and the long hole, and prevents rotation of the interlocking lever, that is, movement of the blade member.
In addition, since it has a third inner peripheral edge formed continuously at an inclination angle different from that of the second inner peripheral edge, when the rotor generates detent torque at the stop position of the blade member, the connecting pin of the interlocking lever Is inscribed from the second inner peripheral edge to the third inner peripheral edge, and the blade member is excessively moved from a predetermined stop position (when stopping at the closed position, further toward the closed side or when stopping at the open position) Further, the urging force is exerted so as to move toward the open position, and the blade member can be reliably positioned and held at the stop position (fully closed position or fully open position).
Accordingly, the blade member can be moved to a predetermined stop position (for example, a position where the opening is closed or opened, even if an impact force due to a drop or the like is received while achieving simplification and downsizing of the apparatus without providing a special mechanism. Position). Further, since the blade member and the interlocking lever are made of a single member, the influence of the accumulated tolerance at the time of assembly is small, and the contact angle between the connecting pin and the long hole (the inner peripheral edge portion) can be set with high accuracy. .

In the configuration according to the first aspect, the extending direction of the second inner peripheral edge portion is 75 degrees to 90 degrees with respect to a straight line passing through the rotation center of the interlocking lever and the connecting pin when the blade member is at the stop position. A configuration that is oriented as such can be employed.
According to this configuration, when the blade member is located at the stop position, when receiving an impact force or the like, the connecting pin is opposite to the direction toward the stop position with respect to the long hole (second inner peripheral edge). It can be prevented from moving. As a result, the blade member can be prevented from malfunctioning, and functional reliability can be ensured.

In the configuration according to the first aspect, the first inner peripheral edge portion is substantially parallel to a straight line passing through the rotation center of the interlocking lever and the rotation center of the blade member when the rotor is positioned approximately in the middle of the operating angle. The formed configuration can be adopted.
According to this configuration, when moving the blade member toward the open position or the closed position from the state in which the connecting pin contacts the second inner peripheral edge and holds the blade member in the stop position, the connection pin is in the middle of the operating range. Since the connecting pin located in contact with the first inner peripheral edge which is substantially parallel to the straight line passing through the rotation center of the interlocking lever and the rotation center of the blade member, the rotational torque exerted by the connection pin is efficiently transmitted to the blade member and rotated. The stagnation time during which no torque is transmitted can be shortened, and the blade member can be moved at high speed.

A camera blade driving device according to a second aspect of the present invention is inserted into a substrate having an opening, a single blade member supported by the substrate so that the opening can be opened and closed, and a long hole of the blade member. A blade drive device for a camera having an actuator including a rotor having a drive pin and rotating a predetermined operating angle, wherein a long hole of the blade member inscribes the drive pin when the blade member is driven to open and close The rotor is continuously formed with an inclination angle different from that of the first inner peripheral edge so as to inscribe the drive pin when the blade member is positioned at a stop position where the blade member closes or opens the opening. A second inner peripheral edge extending in a direction substantially perpendicular to a straight line passing through the rotation center and the drive pin, and a second inner peripheral edge in order to further move in the same direction when the blade member is moved to the stop position. And continuously formed at different inclination angles And a third inner peripheral edge portion, and characterized in that.
According to this configuration, when the rotor rotates, the drive pin is inscribed in the first inner peripheral edge of the long hole, and the blade member opens and closes the opening. And when a blade | wing member stops in the stop position which closes or open | releases an opening part, a drive pin is inscribed in the 2nd inner peripheral part of a long hole. Here, since the second inner peripheral edge extends in a direction substantially perpendicular to the straight line passing through the rotation center of the rotor and the drive pin, the blade member is moved backward from the stop position (to the closed position) by an impact force or the like. The second inner peripheral edge of the long hole provided in the blade member causes the drive pin to move to the rotor, even when trying to move freely (toward the open position when stopping and toward the closed position when stopping at the open position). Thus, the relative movement between the drive pin and the long hole is prevented, and the rotation of the rotor, that is, the movement of the blade member is prevented.
In addition, since it has a third inner peripheral edge formed continuously at an inclination angle different from that of the second inner peripheral edge, when the rotor generates detent torque at the stop position of the blade member, the drive pin of the rotor The blade member is inscribed from the second inner peripheral edge to the third inner peripheral edge, and the blade member is excessively moved from a predetermined stop position (in the case of stopping at the closed position, further toward the closed side and further at the open position) The urging force is applied so that the blade member moves toward the open position, and the blade member can be reliably positioned and held at the stop position (fully closed position or fully open position).
Accordingly, the blade member can be moved to a predetermined stop position (for example, a position where the opening is closed or opened, even if an impact force due to a drop or the like is received while achieving simplification and downsizing of the apparatus without providing a special mechanism. Position). In addition, the apparatus can be simplified by the amount that the interlocking lever is eliminated.

In the configuration according to the second aspect, the extension direction of the second inner peripheral edge portion is set to 75 degrees to 90 degrees with respect to a straight line passing through the rotation center of the rotor and the drive pin when the blade member is at the stop position. A configuration that is oriented to can be employed.
According to this configuration, when the blade member is located at the stop position, when receiving an impact force or the like, the drive pin is opposite to the direction toward the stop position with respect to the elongated hole (second inner peripheral edge). It can be prevented from moving. As a result, the blade member can be prevented from malfunctioning, and functional reliability can be ensured.

In the configuration according to the second aspect, the first inner peripheral edge is formed so as to be substantially parallel to a straight line passing through the rotation center of the rotor and the rotation center of the blade member when the rotor is positioned approximately in the middle of the operating angle. It is possible to adopt the configuration.
According to this configuration, when moving the blade member toward the open position or the closed position from the state in which the drive pin contacts the second inner peripheral edge and holds the blade member in the stop position, the drive pin is in the middle of the operating range. Since the drive pin located contacts the first inner peripheral edge that is substantially parallel to the straight line passing through the rotation center of the rotor and the rotation center of the blade member, the rotation torque exerted by the drive pin is efficiently transmitted to the blade member, and the rotation torque The stagnation time during which no is transmitted can be shortened, and the blade member can be moved at high speed.

  According to the blade drive device for a camera having the above-described configuration, the blade member can be moved to a predetermined stop position (for example, an opening portion) even when an impact force is applied by dropping or the like while achieving simplification of the structure, downsizing of the device, and the like. (Closed position that closes or open position that opens the opening), and when this device is mounted on a digital camera or the like, it prevents high-precision shooting by preventing malfunction of the blade member. It can be performed.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying drawings.
FIGS. 1 to 11 show a lens barrier device as an embodiment of a camera blade driving device according to the present invention, FIG. 1 is an exploded perspective view of the device, and FIG. 2 is a part (cover) of the device. 3 and 5 are a plan view and a partially enlarged plan view showing a state in which the blade member is in the closed position (stop position), and FIGS. 6 and 7 show a state in which the blade member is excessively moved from the closed position. FIG. 8 and FIG. 9 are a plan view and a partial enlarged plan view showing a state where the blade member is in the middle of the operating range, and FIGS. 10 and 11 are a state where the blade member is in the open position. It is the top view and partial enlarged plan view which show.

  As shown in FIGS. 1 and 2, this apparatus has a substrate 10 having a substantially rectangular opening 10 a, an actuator 20 that is fixed to the substrate 10 and generates a rotational driving force, and is rotatably supported with respect to the substrate 10. An interlocking lever 30 that is swingably supported with respect to the substrate 10, and one barrier blade 40 as a blade member that moves between a closed position that closes the opening 10a and an open position that opens the opening 10a, A cover 50 and the like covering the barrier blades 40 are provided.

  As shown in FIGS. 1 and 2, the substrate 10 is formed of a resin material so that the outline is substantially rectangular, and supports the opening 10 a and the barrier blade 40 that are substantially rectangular for the optical path so as to be rotatable. The support shaft 11, the support shaft 12 that rotatably supports the interlocking lever 30, the substantially fan-shaped through hole 13 through which the connecting pin 33 of the interlocking lever 30 described later passes, the guide surface 14 that slides the barrier blade 40, and the barrier blade 40 A closing stopper 15 for positioning the barrier blade 40 at the closing position, an opening stopper 16 for positioning the barrier blade 40 at the opening position, a fixing portion 17 for fixing the actuator 20, a recess 18 for latching a latching piece 52 of the cover 50 described later, and the cover 50. And a screw hole 19 into which a screw B for fastening is screwed.

As shown in FIGS. 1 and 4, the actuator 20 is a moving magnet type motor. The actuator 20 rotates a predetermined operating angle around the axis S1 and has a drive pin 21a as a unit. A support frame 22 that rotatably supports the coil, an excitation coil 23 wound around the support frame 22, a cylindrical yoke 24 fitted around the support frame 22 around the coil 23, and a detent on the rotor 21. A plurality of iron pins 25 and the like fitted to the support frame 22 are provided to generate torque.
The rotor 21 is formed in a columnar shape magnetized in the N pole and the S pole in the circumferential direction. The drive pin 21a is integrally formed so as to be positioned at a predetermined distance from the rotation center (axis line S1) of the rotor 21.

As shown in FIGS. 1, 2, 4, and 5, the interlocking lever 30 is formed of a resin material so as to be flat and substantially L-shaped. A long hole 32 is provided through which the drive pin 21a is passed, and a connecting pin 33 is provided on the other end side to be inserted into a long hole 42 of the barrier blade 40 described later.
In the long hole 32, the inner peripheral edge portion with which the drive pin 21a is inscribed is formed linearly. The connecting pin 33 is formed in a cylindrical shape.
The interlocking lever 30 is supported so as to be rotatable within a predetermined angle range with respect to the substrate 10 about the center axis S2 on the support shaft 12 as a rotation center.

As shown in FIGS. 1, 2, 4, and 5, the barrier blade 40 is formed in a thin plate shape using a resin material or the like, and includes a circular hole 41 through which the support shaft 11 passes and a connecting pin 33 of the interlocking lever 30. A long hole 42 and the like are provided.
As shown in FIGS. 4 and 5, the long hole 42 includes a first inner peripheral edge 42 a, a second inner peripheral edge 42 b formed continuously at a different inclination angle from the first inner peripheral edge 42 a, and a second inner peripheral edge. It is formed so as to demarcate the third inner peripheral edge portion 42c formed continuously at an inclination angle different from that of the portion 42b.

As shown in FIGS. 8 and 9, the first inner peripheral edge 42 a is a region where the connecting pin 33 is inscribed in the middle region of the operation range when the barrier blade 40 is driven to open and close.
As shown in FIGS. 3 to 5, the second inner peripheral edge portion 42 b is located in the closed position (stop position) when the barrier blade 40 is positioned in the closed position (stop position) that closes the opening 10 a. This is a region where the connecting pin 33 is inscribed.
As shown in FIGS. 5 to 7, the third inner peripheral edge portion 42 c causes the connecting pin 33 to be inscribed so as to further move in the same direction when the barrier blade 40 is moved to the closed position (stop position). It is an area.

The barrier blade 40 has a predetermined axis with respect to the substrate 10 with the support shaft 11 being passed through the circular hole 41 and the connecting pin 33 being passed through the long hole 42, with the center axis S3 on the support shaft 11 being the center of rotation. An angular range (a range in which rotation is restricted by the closing stopper 15 and the opening stopper 16) is rotatably supported, and the closing position for closing the opening 10a and the opening 10a are opened by the rotational driving force exerted by the connecting pin 33. It moves between open positions.
Here, the time when the barrier blade 40 is located at the closed position is defined as the stop position.

Here, as shown in FIGS. 4 and 5, the second inner peripheral edge portion 42 b is configured such that when the barrier blade 40 is in the stop position (closed position), the rotation center S <b> 2 of the interlocking lever 30 and the connecting pin 33 (center axis thereof). ) Along the straight line L2 extending in a substantially perpendicular direction, that is, the angle θ shown in FIG. 5 is formed to be approximately 90 degrees.
Accordingly, when the rotor 21 rotates counterclockwise in FIG. 4 and the interlocking lever 30 rotates clockwise in FIG. 4 to stop the barrier blade 40 in the closed position (stop position), the connecting pin 33 Is inscribed by moving from the first inner peripheral edge 42a of the elongated hole 42 to the second inner peripheral edge 42b.

  Here, the second inner peripheral edge portion 42b extends in a direction substantially perpendicular to the straight line L1 passing through the rotation center S2 of the interlocking lever 30 and the connecting pin 33 (the central axis thereof). Even if 40 is going to move freely from the closed position (stop position) to the open position in the opposite direction, the second inner peripheral edge portion 42b of the long hole 42 provided in the barrier blade 40 causes the connecting pin 33 to be connected to the interlocking lever 30. Will be pressed toward the rotation center S2, and the relative movement of the connecting pin 33 and the long hole 42 is prevented, and the rotation of the interlocking lever 30, that is, the movement of the barrier blade 40 is prevented.

  Accordingly, the barrier blade 40 can be held in a predetermined closed position (stop position) even when subjected to an impact force due to dropping or the like while achieving simplification and downsizing of the apparatus without providing a special mechanism. In addition, since the barrier blade 40 and the interlocking lever 30 are made of a single member, the influence of the accumulated tolerance at the time of assembly is small, and the connecting pin 33 and the long hole 42 (the first inner peripheral edge portion 42a and the second inner peripheral edge thereof). The contact angle between the portion 42b and the third inner peripheral edge portion 42c) can be set with high accuracy.

  The extension direction of the second inner peripheral edge portion 42b when the barrier blade 40 is in the closed position (stop position), that is, the angle θ is preferably 75 degrees to 90 degrees with respect to the straight line L, and more preferably. It is set to about 85 degrees. According to this, when the barrier blade 40 is in the closed position (stop position) and receives an impact force or the like, the connecting pin 33 is in the closed position with respect to the long hole 42 (second inner peripheral edge portion 42b). It is possible to prevent movement in the direction opposite to the direction toward the (stop position). Further, when the barrier blade 40 is moved from the closed position (stop position) toward the open position, smooth movement is possible. As a result, it is possible to prevent the barrier blades 40 from malfunctioning and to ensure functional reliability.

  Further, as shown in FIG. 5, the second inner peripheral edge portion 42 b is preferably formed at a position where the straight line L <b> 2 in the extending direction is close to a parallel straight line L <b> 2 ′ passing through the rotation center S <b> 3 of the barrier blade 40. According to this, when the barrier blade 40 tries to rotate clockwise (toward the open position) in FIG. 5, the vector with which the second inner peripheral edge portion 42 b presses the connecting pin 33 can be obtained with higher accuracy. Since the rotation is directed on the straight line L1, the rotation of the interlocking lever 30 can be prevented more reliably. Therefore, the rotation of the barrier blade 40 can be regulated and held at a predetermined closed position (stop position).

  As described above, the third inner peripheral edge portion 42c is formed to further move in the same direction when the barrier blade 40 is moved to the closed position (stop position). In the case where the rotor 21 generates detent torque, the connecting pin 33 of the interlocking lever 30 moves from the second inner peripheral edge portion 42b to the third inner peripheral edge portion 42c and is inscribed, and the barrier blade 40 is An urging force is applied so as to move excessively from a predetermined closed position (stop position) (and move toward the closed side), and the barrier blade 40 is reliably positioned and held at the closed position (stop position). be able to.

As shown in FIGS. 8 and 9, when the rotor 21 is positioned approximately in the middle of the operating angle ω, the first inner peripheral edge portion 42a has a straight line L3 extending in the direction of rotation S2 of the interlocking lever 30 and the barrier blade. It is formed so as to be substantially parallel to a straight line L4 passing through 40 rotation centers S3.
According to this, when moving the barrier blade 40 toward the open position from the state where the connecting pin 33 contacts the second inner peripheral edge 42b and holds the barrier blade 40 in the closed position (stop position), Since the connecting pin 33 located in the middle of the operating range contacts the first inner peripheral edge portion 42a that is substantially parallel to the straight line L4 passing through the rotation center S2 of the interlocking lever 30 and the rotation center S3 of the barrier blade 40, the connecting pin 33 is The applied rotational torque is efficiently transmitted to the barrier blade 40, the stagnation time during which the rotational torque is not transmitted can be shortened, and the barrier blade 40 can be moved at high speed.

As shown in FIG. 1, the cover 50 is formed of a thin metal plate or the like so as to form a substantially rectangular shape. The cover 50 has a substantially rectangular opening 50a and a connecting pin at a position corresponding to the opening 10a of the substrate 10. 33 is provided with a substantially arc-shaped through-hole 51 that allows movement of 33, a latch piece 52, a circular hole 53 through which the screw B is passed, and the like.
Then, with respect to the substrate 10 to which the barrier blade 40 is assembled, the latching piece 52 is latched in the concave portion 18 of the substrate 10 and screwed into the screw hole 19 of the substrate 10 through the screw B from the outside of the circular hole 53. Thus, the cover 50 is fixed to the substrate 10 in a state where the barrier blade 40 is rotatably covered.

Next, the opening / closing operation of the barrier blade 40 in this lens barrier device will be described with reference to FIGS.
First, when the rotor 21 is located at one rotation end within the range of the operating angle ω, the interlocking lever 30 rotates clockwise, and the barrier blade 40 contacts the closing stopper 15 as shown in FIG. It exists in the closed position (stop position) which closes the opening part 10a.
At this time, as shown in FIGS. 4 and 5, the connecting pin 33 of the interlocking lever 30 is inscribed in the second inner peripheral edge 42 b of the long hole 42, and the barrier blade 40 rotates toward the open position. Is regulated.
In addition, when the rotor 21 generates a strong detent torque, the interlocking lever 30 is urged to rotate clockwise, so that the connecting pin 33 of the interlocking lever 30 has a second inner peripheral edge as shown in FIGS. The barrier blade 40 is held in the closed position by moving from the second inner peripheral edge portion 42c to the third inner peripheral edge 42c and urging the barrier blade 40 to move further toward the closed side.

Subsequently, when the rotor 21 starts to rotate clockwise by energization of the coil 23, the interlocking lever 30 starts to rotate counterclockwise, and the connecting pin 33 of the interlocking lever 30 is connected to the second inner peripheral edge portion 42b (or From the third inner peripheral edge 42c) to the first inner peripheral edge 42a and inscribed, the barrier blade 40 starts to rotate clockwise toward the open position.
When the rotor 21 reaches a substantially intermediate position of the operating angle, as shown in FIGS. 8 and 9, the first inner peripheral edge portion 42 a of the long hole 42 is the rotation center S <b> 2 of the interlocking lever 30 and the rotation center of the barrier blade 40. The rotating torque exerted by the connecting pin 33 is transmitted to the barrier blade 40 efficiently, being oriented so as to be substantially parallel to the straight line L4 passing through S3.
Subsequently, when the rotor 21 further rotates in the same direction and reaches the other rotation end, the interlocking lever 30 further rotates counterclockwise, and the barrier blades 40 are opened stoppers as shown in FIGS. 16 is positioned at an open position where the opening 10a is opened. At this time, the connecting pin 3 reaches the region of the second inner peripheral edge portion 42b again, but there is no relation of the angle θ as described above.

  On the other hand, when the rotor 21 starts to rotate counterclockwise due to reverse energization of the coil 23, the closed position (stop position) shown in FIG. 3 and further to FIG. As shown in the figure, it reaches the closed position biased toward the over-moving position, and the connecting pin 33 is inscribed in the second inner peripheral edge portion 42b of the elongated hole 42 and further inscribed in the third inner peripheral edge portion 42c. 40 is securely held in the closed position (stop position).

In this closed position (stop position), even if the barrier blade 40 tries to move in the reverse direction (toward the open position) from the closed position (stop position) due to external impact force or the like, it is provided on the barrier blade 40. The second inner peripheral edge portion 42b of the elongated hole 42 presses the connecting pin 33 toward the rotation center S2 of the interlocking lever 30, and the relative movement between the connecting pin 33 and the elongated hole 42 is prevented. The rotation of the interlocking lever 30, that is, the movement of the barrier blade 40 is prevented.
Therefore, the barrier blade 40 can be held at a predetermined stop position (closed position) without providing a special mechanism. Further, since the barrier blade 40 and the interlocking lever 30 are made of a single member, the influence of the accumulated tolerance during assembly is small, and the contact angle between the connecting pin 33 and the long hole 42 (the inner peripheral edge thereof) is highly accurate. Can be set.
According to the above apparatus, the barrier blade 40 can be reliably held at a predetermined stop position (closed position) even when an impact force is applied due to dropping or the like while achieving simplification of the structure, downsizing of the apparatus, and the like. When this apparatus is mounted on a digital camera or the like, it is possible to prevent malfunction of the barrier blade 40 and perform high-accuracy shooting.

  12 to 16 show a lens barrier device as another embodiment of a camera blade driving device according to the present invention. FIG. 12 is a perspective view in which a part (cover) of the device is omitted, FIG. 14 and 14 are a plan view and a partially enlarged plan view showing a state in which the blade member is at a stop position (closed position), FIG. 15 is a partially enlarged plan view showing a state in which the blade member is in the middle of the operating range, and FIG. It is a top view which shows the state which has a blade | wing member in an open position.

In this embodiment, the interlocking lever 30 in the above-described embodiment is abolished, and the barrier blade 40 'is directly opened and closed by the drive pin 21a. The same configuration as that of the above-described embodiment is the same. The description will be omitted.
As shown in FIGS. 12 to 16, this apparatus has a substrate 10 ′ having a substantially rectangular opening 10 a, an actuator 20 that is fixed to the substrate 10 ′ and generates a rotational driving force, and can swing with respect to the substrate 10. One barrier blade 40 'as a blade member that moves between a closed position that is supported by the opening and closes the opening 10a and an open position that opens the opening 10a, a cover 50 (not shown) that covers the barrier blade 40', etc. It has.

As shown in FIGS. 13 and 16, the substrate 10 'includes an opening 10a, a support shaft 11, an arc-shaped through hole 13, a guide surface 14, a closing stopper 15, an opening stopper 16, a fixing portion 17, a recess 18, and a screw. A hole 19 and the like are provided.
As shown in FIGS. 13 to 15, the barrier blade 40 ′ includes a circular hole 41 through which the support shaft 11 passes, a long hole 42 through which the drive pin 21 a passes, and the like.
As shown in FIGS. 14 and 15, the long hole 42 includes a first inner peripheral edge 42 a, a second inner peripheral edge 42 b continuously formed at an inclination angle different from the first inner peripheral edge 42 a, and a second inner peripheral edge. It is formed so as to demarcate the third inner peripheral edge portion 42c formed continuously at an inclination angle different from that of the portion 42b.

As shown in FIG. 15, the first inner peripheral edge 42a is a region where the drive pin 21a is inscribed in the middle region of the operation range when the barrier blade 40 'is driven to open and close.
As shown in FIG. 14, the second inner peripheral edge portion 42b is a drive pin when the barrier blade 40 'is positioned at the closed position (stop position) that closes the opening 10a and is also in the closed position (stop position). This is an area in which 21a is inscribed.
As shown in FIG. 14, the third inner peripheral edge 42 c is a region where the drive pin 21 a is inscribed so that the barrier blade 40 ′ is moved excessively in the same direction when moved to the closed position (stop position). is there.

  The barrier blade 40 ′ is configured such that the support shaft 11 is passed through the circular hole 41, the drive pin 21 a of the rotor 21 is passed through the long hole 42, and the substrate 10 ′ is centered on the central axis S 3 on the support shaft 11. A rotational angle of the drive pin 21a is supported so as to freely rotate within a predetermined angle range, and the movable pin 21a moves between a closed position for closing the opening 10a and an open position for opening the opening 10a. ing. The stop position is defined when the barrier blade 40 'is located at the closed position.

Here, as shown in FIG. 13 and FIG. 14, the second inner peripheral edge portion 42 b has the rotation center S <b> 1 of the rotor 21 and the drive pin 21 a (center axis thereof) when the barrier blade 40 ′ is in the stop position (closed position). ) Along the straight line L2 extending in a substantially perpendicular direction, that is, the angle θ shown in FIG. 14 is formed to be approximately 90 degrees.
Accordingly, when the rotor 21 rotates clockwise in FIG. 14 to stop the barrier blade 40 ′ at the closed position (stop position), the drive pin 21 a is moved from the first inner peripheral edge 42 a of the long hole 42 to the first position. 2 Moves to the inner peripheral edge 42b and is inscribed.

Here, the second inner peripheral edge portion 42b extends in a direction substantially perpendicular to a straight line L1 ′ passing through the rotation center S1 of the rotor 21 and the drive pin 21a (the central axis thereof). Even if 40 'tries to move freely from the closed position (stop position) to the open position in the reverse direction, the second inner peripheral edge portion 42b of the long hole 42 provided in the barrier blade 40' causes the drive pin 21a to move to the rotor. Thus, the drive pin 21a and the long hole 42 are prevented from moving relative to each other, and the rotation of the rotor 21, that is, the movement of the barrier blade 40 'is prevented.
Accordingly, the barrier blade 40 'can be held in a predetermined closed position (stop position) even when subjected to impact force due to dropping or the like while achieving simplification and downsizing of the apparatus without providing a special mechanism. In addition, the structure can be simplified as much as the above-described interlocking lever 30 is eliminated.

  The extension direction of the second inner peripheral edge 42b when the barrier blade 40 ′ is in the closed position (stop position), that is, the angle θ is preferably 75 to 90 degrees with respect to the straight line L1 ′. Preferably, it is set to about 85 degrees. According to this, the drive pin 21a is closed with respect to the long hole 42 (second inner peripheral edge 42b) when receiving an impact force or the like with the barrier blade 40 'positioned at the closed position (stop position). It is possible to prevent movement in the direction opposite to the direction toward the position (stop position). Further, when the barrier blade 40 'is moved from the closed position (stop position) toward the open position, smooth movement is possible. As a result, the barrier blade 40 'can be prevented from malfunctioning, and functional reliability can be ensured.

  Further, as shown in FIG. 14, the second inner peripheral edge portion 42b is preferably formed at a position where the straight line L2 in the extending direction is close to a parallel straight line L2 ′ passing through the rotation center S3 of the barrier blade 40 ′. According to this, when the barrier blade 40 'is about to rotate clockwise (toward the open position) in FIG. 14, the vector by which the second inner peripheral edge portion 42b presses the drive pin 21a is more accurate. Therefore, the rotation of the rotor 21 can be prevented more reliably, and therefore, the rotation of the barrier blade 40 'can be restricted and held at a predetermined closed position (stop position). .

  Since the third inner peripheral edge portion 42c is formed to further move in the same direction when the barrier blade 40 'is moved to the closed position (stop position), the barrier blade 40' is moved to the closed position (stop position). In some cases, when the rotor 21 generates detent torque, the drive pin 21a is inscribed from the second inner peripheral edge portion 42b to the third inner peripheral edge portion 42c, and the barrier blade 40 'is placed in a predetermined closed position (stop position). Therefore, the barrier blade 40 'can be reliably positioned and held at the closed position (stop position).

Further, as shown in FIG. 15, when the rotor 21 is positioned approximately in the middle of the operating angle ω, the first inner peripheral edge portion 42a has a straight line L3 in the extending direction such that the rotation center S1 of the rotor 21 and the barrier blade 40 ′ Is formed so as to be substantially parallel to a straight line L4 ′ passing through the rotation center S3.
According to this, when the drive pin 21a moves the barrier blade 40 'from the state in contact with the second inner peripheral edge 42b and holding the barrier blade 40' in the closed position (stop position) toward the open position. Furthermore, the drive pin 21a located in the middle of the operating range contacts the first inner peripheral edge portion 42a that is substantially parallel to the straight line L4 ′ that passes through the rotation center S1 of the rotor 21 and the rotation center S3 of the barrier blade 40 ′. The rotational torque exerted by the pin 21a is efficiently transmitted to the barrier blade 40 ', the stagnation time during which the rotational torque is not transmitted can be shortened, and the barrier blade 40' can be moved at high speed.
Since the operation of this apparatus is basically the same as that of the above-described embodiment, the description thereof is omitted.

  According to the above apparatus, the barrier blade 40 'is securely held at a predetermined stop position (closed position) even when an impact force is applied by dropping or the like while achieving simplification of the structure, downsizing of the apparatus, and the like. When this apparatus is mounted on a digital camera or the like, it is possible to perform high-accuracy shooting by preventing malfunction of the barrier blade 40 '.

In the above embodiment, when the barrier blades 40, 40 'are in the closed position as the stop position, the second inner peripheral edge portion 42b and the third inner peripheral edge portion 42c come into contact with the connecting pin 33 or the drive pin 21a, and the barrier blade Although the case of acting to hold 40, 40 'in a predetermined stop position has been shown, when the barrier blades 40, 40' are in the open position, at least so as to prevent relative movement of the drive pin and the long hole. An open position where the opening 10a is opened may be defined as a stop position by forming portions corresponding to the first inner peripheral edge and the second inner peripheral edge.
In the above embodiment, the barrier blades 40 and 40 'are shown as the blade members. However, the present invention is not limited to this, and the present invention is applied to a configuration including shutter blades, diaphragm blades, ND filter blades, or the like. It may be adopted.
In the above embodiment, the case where this apparatus is mounted on a digital camera has been described. However, the present invention is not limited to this, and the present invention is also applied to a silver salt film type camera and other cameras. Also good.

  As described above, the camera blade driving device according to the present invention is small in size because it can securely hold the blade member at a predetermined stop position while achieving simplification of the structure, size reduction of the device, and the like. As long as it is mounted on a portable digital camera or the like, as long as it has a risk of malfunction of the wing member due to external impact force, etc., it is not limited to a portable camera but also a fixed camera. Useful.

It is a disassembled perspective view which shows one Embodiment of the blade drive device for cameras of this invention. It is the perspective view which abbreviate | omitted a part (cover) of the apparatus shown in FIG. In the apparatus shown in FIG. 1, it is a top view which shows the state which has a blade | wing member in a closed position (stop position). In the apparatus shown in FIG. 1, it is a partial enlarged plan view which shows the state which has a blade | wing member in a closed position (stop position). In the apparatus shown in FIG. 1, it is a partial enlarged plan view which shows the state which has a blade | wing member in a closed position (stop position). In the apparatus shown in FIG. 1, it is a top view which shows the state which the blade member further moved excessively from the closed position (stop position). In the apparatus shown in FIG. 1, it is a partial enlarged plan view which shows the state which the blade member further moved excessively from the closed position (stop position). In the apparatus shown in FIG. 1, it is a top view which shows the state which has a blade member in the middle position of an opening-and-closing operation | movement. In the apparatus shown in FIG. 1, it is a partial enlarged plan view which shows the state which has a blade member in the middle position of an opening-and-closing operation | movement. In the apparatus shown in FIG. 1, it is a top view which shows the state which has a blade | wing member in an open position. In the apparatus shown in FIG. 1, it is a partial enlarged plan view which shows the state which has a blade | wing member in an open position. FIG. 7 is a perspective view showing another embodiment of the camera blade driving device of the present invention, with a part (cover) of the device omitted. In the apparatus shown in FIG. 12, it is a top view which shows the state which has a blade | wing member in a closed position (stop position). In the apparatus shown in FIG. 12, it is a partial enlarged plan view which shows the state which has a blade | wing member in a closed position (stop position). In the apparatus shown in FIG. 12, it is a partial enlarged plan view which shows the state which has a blade | wing member in the middle position of an opening / closing operation | movement. In the apparatus shown in FIG. 12, it is a top view which shows the state which has a blade | wing member in an open position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,10 'Board | substrate 10a Opening part 11 and 12 Support shaft 13 Through-hole 14 Guide surface 15 Closing stopper 16 Opening stopper 17 Fixing part 18 Recessed part 19 Screw hole 20 Actuator 21 Rotor 21a Drive pin 22 Support frame 23 Excitation coil 24 Yoke 25 Iron pin 30 Interlocking lever 31 Circular hole 32 Long hole 33 Connecting pin 40, 40 'Barrier blade (blade member)
41 circular hole 42 long hole 42a first inner peripheral edge part 42b second inner peripheral edge part 42c third inner peripheral edge part 50 cover 50a opening S1 rotor rotation center S2 interlocking lever rotation center S3 barrier blade rotation center L1 interlocking lever Straight line L1 ′ passing through the rotation center and the connecting pin L4 ′ straight line passing through the rotation center of the rotor and the driving pin L4 ′ Straight line passing through the rotation center of the interlocking lever and the rotation center of the barrier blades A straight line passing through the rotation center of the rotor and the rotation center of the barrier blades

Claims (6)

A substrate having an opening, a single blade member supported by the substrate so that the opening can be opened and closed, and a connecting pin inserted into a long hole of the blade member, and rotatably supported by the substrate A blade driving device for a camera including an interlocking lever and an actuator including a rotor having a driving pin connected to the interlocking lever and rotating a predetermined operating angle,
The long hole of the blade member is positioned at a first inner peripheral edge portion that inscribes the connecting pin when the blade member is driven to open and close, and a stop position where the blade member closes or opens the opening portion. In order to inscribe the connecting pin, the first inner peripheral edge is formed continuously at a different inclination angle and extends in a direction substantially perpendicular to the rotation center of the interlocking lever and a straight line passing through the connecting pin. and the 2 peripheral portion, to further over-move in the same direction when moving the blade member to the stop position, the third inner peripheral edge portion which is continuously formed at an inclination angle different from the second inner peripheral edge portion Have
A blade drive device for a camera. The extending direction of the second inner peripheral edge is oriented so as to form 75 to 90 degrees with respect to a straight line passing through the rotation center of the interlocking lever and the connecting pin when the blade member is at the stop position. Yes,
The camera blade driving device according to claim 1, wherein The first inner peripheral edge portion is formed so as to be substantially parallel to a straight line passing through the rotation center of the interlocking lever and the rotation center of the blade member when the rotor is positioned approximately in the middle of the operating angle.
The camera blade driving device according to claim 1, wherein the camera blade driving device is provided. A substrate having an opening, a blade member supported by the substrate so that the opening can be opened and closed, and a drive pin inserted into a long hole of the blade member, and rotating a predetermined operating angle. A camera blade driving device including an actuator including a rotor,
The long hole of the blade member is positioned at a first inner peripheral edge portion that inscribes the drive pin when the blade member is driven to open and close, and a stop position where the blade member closes or opens the opening portion. A second portion extending in a direction substantially perpendicular to the rotation center of the rotor and a straight line passing through the drive pin and continuously formed at a different inclination angle from the first inner peripheral edge to inscribe the drive pin; An inner peripheral edge and a third inner peripheral edge formed continuously at an inclination angle different from that of the second inner peripheral edge so as to further move in the same direction when the blade member is moved to the stop position. ,
A blade drive device for a camera. The extending direction of the second inner peripheral edge is oriented so as to form 75 to 90 degrees with respect to a straight line passing through the rotation center of the rotor and the drive pin when the blade member is in the stop position. ,
The camera blade driving device according to claim 4 . The first inner peripheral edge portion is formed to be substantially parallel to a straight line passing through the rotation center of the rotor and the rotation center of the blade member when the rotor is positioned approximately in the middle of the operating angle.
The camera blade driving device according to claim 4, wherein the camera blade driving device is provided.

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