JP2009271098A - Blade drive device for camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a blade member from moving freely by impulsive force or the like in a blade drive device for a camera. <P>SOLUTION: The blade drive device for the camera includes a substrate 10 having an aperture part 10a, a drive source 50 including a rotor 51 having a drive pin 51c and turning around a first center of rotation C1 on the substrate, and the blade member 40 having a long hole 40b in which the drive pin is inserted, turning around a second center of rotation C2 on the substrate and moving between a shutting position and an opening position of the aperture part. The drive pin 51c is formed to reciprocate across an area linking the first center of rotation C1 and the second center of rotation C2, and the long hole 40b is formed so that an intersection point P of a normal L2 perpendicular to a center line L1 and passing the drive pin and a line L3 passing the first center of rotation and the second center of rotation may be located on the first center of rotation C1 or on the outside of the first center of rotation C1 seen from the second center of rotation C2 when the blade member is located at the shutting position or the opening position. Thus, when the blade member is located at the shutting position or the opening position, the blade member is prevented from moving freely by the impulsive force or the like. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a camera blade driving device that drives and positions a blade member such as a barrier blade, a shutter blade, or a diaphragm blade disposed in an opening of a digital camera or the like.

As a conventional camera blade driving device, a substrate having an opening, at least one shutter blade that is rotatably supported with respect to the substrate and opens and closes the opening, and a shutter blade are positioned at a closed position and an open position, respectively. Therefore, the base plate is configured to be supported on the substrate in a swingable manner and to rotate in the opposite direction to the shutter blades. The stopper is provided on the base plate, the rotor has a drive pin inserted into a long hole formed in the shutter blade. And a balance plate or the like that is supported by the drive pin and that prevents the shutter blade from running away due to the presence of the balance plate when an impact is applied to the camera. For example, see Patent Document 1).
However, since this camera blade drive device is provided with a balance plate that is not related to the original opening / closing operation, the number of parts increases, and the weight increases because the balance plate has inertial mass. Causes an increase in size, cost, and weight of the apparatus.

As another camera blade driving device, a substrate having an opening, a pair of barrier blades supported to be rotatable with respect to the substrate and opening and closing the opening, and a ground plane to position the pair of barrier blades in an open position Provided with a stopper, a link member that opens and closes a pair of barrier blades, an electromagnetic drive source that includes a rotor having a drive pin that drives the link member, and the stopper is formed of one of a magnet and a ferromagnetic material. The at least one region of the pair of barrier blades that contacts the stopper is formed by the other of the magnet and the ferromagnetic material to be an adsorbing portion so that the barrier blades are prevented from moving freely even when subjected to impact force due to dropping or the like. What was made into is known (for example, refer patent document 2).
However, in this camera blade drive device, magnetic attraction force is used as a means for holding the barrier blade. Therefore, if the impact force is large, the barrier blade may move without permission. To endure, it is necessary to enlarge the magnet. If the magnet is enlarged, the driving force when driving the barrier blades against the magnetic attractive force of the magnet must be increased, and the drive source becomes larger. Invite.

JP 2007-033602 A JP 2006-284441 A

  The present invention has been made in view of the above circumstances, and its object is to reduce the impact force caused by dropping or the like while simplifying the structure, reducing the size, weight, and cost of the apparatus. It is an object of the present invention to provide a camera blade drive device that can prevent the blade member from moving freely from the closed position or the open position of the opening portion even if added.

A camera blade drive device according to the present invention includes a substrate having an opening, a drive source including a drive pin and a rotor that rotates about a first rotation center on the substrate, and a slot into which the drive pin is inserted. A blade driving device for a camera comprising a blade member that rotates between a closed position that rotates around a second rotation center on the substrate and closes the opening and an open position that opens the opening, The drive pin is formed so as to reciprocate across a region connecting the first rotation center and the second rotation center, and the elongated hole has a center line when the blade member is located at the closed position or the open position. And the intersection of the normal line passing through the drive pin and the straight line passing through the first rotation center and the second rotation center is located on the first rotation center or outside the first rotation center as viewed from the second rotation center. It is characterized by being formed.
According to this configuration, when the blade member is in the closed position for closing the opening or the open position for opening the opening, even if the blade member tries to move in the reverse direction due to an impact force from the outside, The pressure angle between the long hole (normal line) and the moving direction (rotating direction) of the drive pin is large, and the force that the blade member (the long hole) pushes the drive pin cannot rotate the rotor. It can be held in a predetermined stop position (closed position or open position). Therefore, even if the apparatus is mounted on a digital camera or the like and receives an impact force due to dropping or the like, the blade member is held at a predetermined position without moving freely, and an expected state can be secured.
In addition, since the slot of the blade member and its rotation center (second rotation center), the rotation center of the rotor (first rotation center), and the operating area of the drive pin are only defined, the structure can be simplified and the device Miniaturization, cost reduction, and weight reduction compared to the prior art can be achieved.

In the above configuration, the substrate may have a stopper having a stopper that abuts the driving pin when the intersection is located outside the first rotation center.
According to this configuration, when the blade member is in the closed position or the open position, even if an impact force is applied from the outside and the blade member tries to move in the reverse direction, the drive pin comes into contact with the stopper. It can be surely prevented.

In the above configuration, the substrate may have a configuration in which the substrate has an auxiliary stopper that abuts the blade member to restrict the blade member from excessively moving from the closed position or the open position.
According to this configuration, when the blade member is in the closed position or the open position, the blade member is moved to the auxiliary stopper when the blade member is further moved from the closed position or the open position by the external force. Since the contact and the excessive movement are restricted, it is possible to prevent the blade member from being damaged, the drive pin (and the rotor) from being damaged, and the like.

The said structure WHEREIN: The structure currently formed so that the action | operation range of a drive pin may be divided into two substantially equally by the straight line which passes along a 1st rotation center and a 2nd rotation center is employable.
According to this configuration, the blade member can be reliably moved to the closed position or the open position while setting the operating range of the drive pin wide.

The said structure WHEREIN: The structure formed so that the centerline may pass through the 2nd rotation center (rotation center of a blade member) can be employ | adopted for the long hole of a blade member.
According to this configuration, the operating range of the drive pin is set symmetrically with respect to a straight line passing through the rotation center of the rotor (first rotation center) and the rotation center of the blade member (second rotation center) (second magnitude). Can be easily secured.

  According to the blade drive device for a camera having the above-described configuration, the structure is simplified, the cost is reduced, the device is reduced in size, the weight is reduced, and the device is mounted on a digital camera or the like. Even when receiving an impact force, the blade member can be reliably held at the closed position or the open position of the opening, and a highly accurate opening / closing operation without causing a malfunction can be obtained.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying drawings.
1 to 8 show an embodiment of a camera blade driving device according to the present invention. FIG. 1 is an exploded perspective view of the device, FIG. 2 is a plan view of the device, and FIG. 3 is a sectional view of the device. 4 is a plan view showing the operating range of the drive pin, and FIGS. 5 to 8 are plan views showing the relationship between the blade member (long hole) and the rotor (drive pin) included in the apparatus. 5 to 8, the cover is omitted for convenience.

  As shown in FIGS. 1 and 2, this apparatus is rotated by a substantially rectangular opening 10 a using a base plate 10 as a substrate, an auxiliary base plate 20 connected to the base plate 10, a cover 30 connected to the base plate 10, and the base plate 10. A barrier blade 40 as a movably supported blade member, a rotor 51 having a drive pin 51c for opening and closing the barrier blade 40, a yoke 52, a bobbin 53, and a drive source 50 including an exciting coil 54 are provided. Yes.

  As shown in FIGS. 1 to 3, the main plate 10 is formed of a resin material so that the outline is substantially rectangular, and has a substantially rectangular opening 10 a, a flat surface 10 b on which the barrier blades 40 slide, and a rotor 51. A circular bearing hole 10c that rotatably supports the rotating shaft 51a, a columnar support shaft 10d that supports the barrier blade 40 in a swingable manner, and both ends of the fan-shaped through hole abut the drive pin 51c. The closed-side stopper 10e and the opening-side stopper 10f, cylindrical auxiliary stoppers 10g and 10h for contacting the barrier blades 40, an accommodation recess 10i for accommodating the drive source 50, and the like are provided.

As shown in FIGS. 1 and 2, the bearing hole 10 c receives the rotation shaft 51 a of the rotor 51 and defines a first rotation center C <b> 1 as the rotation center of the rotor 51.
As shown in FIGS. 1 and 2, the support shaft 10 d is inserted into a circular hole 40 a of the barrier blade 40 to define a second rotation center C <b> 2 as the rotation center of the barrier blade 40.
As shown in FIG. 6, the stopper 10e on the closing side is formed so as to position the barrier blade 40 at the closed position of the opening 10a by stopping the drive pin 51c.
As shown in FIG. 8, the opening-side stopper 10f is formed so as to position the barrier blade 40 at the opening position of the opening 10a by stopping the drive pin 51c.
As shown in FIG. 6, the auxiliary stopper 10 g causes the barrier blade 40 to abut upon receiving an external force that is further moved from the state in which the barrier blade 40 is in the closed position (in a direction away from the opening 10 a). It is formed to restrict movement.
As shown in FIG. 8, when the auxiliary stopper 10h receives an external force that causes the barrier blade 40 to move excessively (in a direction away from the opening 10a) from the state in which the barrier blade 40 is in the open position, It is formed to restrict movement.
As shown in FIG. 3, the housing recess 10 i is formed so as to hold and position the yoke 52 of the drive source 50 in cooperation with the auxiliary base plate 20.

As shown in FIGS. 1 and 3, the auxiliary base plate 20 includes a circular bearing hole 20 a that rotatably supports the rotating shaft 51 a of the rotor 51, a rectangular hole 20 b that passes the bobbin 53 of the driving source 50, and the coil 54. I have. The auxiliary base plate 20 is connected to the base plate 10 using screws (not shown) or the like, so as to cooperate with the base plate 10 to rotatably support the rotor 51 and position the yoke 52 at a predetermined position. It is designed to be fixed.
As shown in FIGS. 1 to 3, the cover 30 includes an opening 30a formed in the same shape as the opening 10a of the main plate 10, a fitting hole 30b for fitting the support shaft 10d, and auxiliary stoppers 10g and 10h, respectively. Fitting holes 30c and 30d to be fitted, arcuate holes 30e allowing the movement of the drive pin 51c, and the like are provided. The cover 30 is configured to cover the barrier blades 40 by being connected to the base plate 10 using screws (not shown) or the like.

As shown in FIGS. 1 to 3, the drive source 50 includes a rotor 51, two yokes 52, a bobbin 53 fitted to each yoke 52, an excitation coil 54 wound around the bobbin 53, and the like. ing.
The rotor 51 includes a rotation shaft 51a having a center line coaxially with the first rotation center C1, a columnar magnetized portion 51b magnetized with N and S poles so that the outer peripheral surface is divided in the circumferential direction, A columnar drive pin 51c is integrally formed at a position deviated from the shaft 51a in the radial direction. Here, the rotor 51 may be formed of a single material so as to demarcate the rotation shaft 51a, the magnetized portion 51b, and the drive pin 51c, and thereafter the whole may be magnetized.
As shown in FIG. 2, the yoke 52 is formed to be bent in a substantially U shape, and defines magnetic pole portions 52a and 52b facing the outer peripheral surface of the rotor 51 (magnetized portion 51b) at both ends thereof. Yes. Then, by switching the energization direction to the coil 54, the rotor 51 rotates in one direction and the other direction.

Here, as shown in FIGS. 2 and 4, the operating range of the drive pin 51 c crosses the region connecting the first rotation center C <b> 1 of the rotor 51 and the second rotation center C <b> 2 of the barrier blade 40 (straight line L <b> 3). It is formed to reciprocate.
Specifically, as shown in FIG. 4, the operating range (operating angle θ) of the drive pin 51c is stopped by contacting the stopper 10e on the closing side when it rotates a predetermined angle θ / 2 clockwise from the straight line L3, On the other hand, when rotating a predetermined angle θ / 2 counterclockwise from the straight line L3, it comes into contact with the opening-side stopper 10f and stops, that is, by a straight line L3 passing through the first rotation center C1 and the second rotation center C2. It is formed so as to be divided into two equal parts.
According to this, the operating range (operating angle θ) of the drive pin 51c can be set wide, and the barrier blade 40 is closed to completely close the opening 10a and open to fully open the opening 10a. Can be moved to.

As shown in FIGS. 1 and 2, the barrier blade 40 includes a circular hole 40a into which the support shaft 10d is fitted, a long hole 40b into which the drive pin 51c is inserted, and the like. The barrier blade 40 is configured such that the support shaft 10d is fitted into the circular hole 40a and the driving pin 51c is inserted into the long hole 40b, and the rotor 51 (the driving pin 51c) reciprocates within a predetermined operating range. The base plate 10 is formed so as to reciprocate along the flat surface 10b. That is, the barrier blade 40 rotates around the second rotation center C2 on the substrate 10 and moves between a closed position for closing the opening 10a and an open position for opening the opening 10a. .
The long hole 40b is formed such that its center line L1 passes through the second rotation center C2 (the center of the circular hole 40a). According to this, as described above, the operating range of the drive pin 51c with respect to the straight line L3 passing through the rotation center of the rotor 51 (first rotation center C1) and the rotation center of the barrier blade 40 (second rotation center C2). An arrangement configuration in which (the operating angle θ) is set axisymmetrically (bisected) can be easily ensured.

  Here, the mutual relationship among the long hole 40b of the barrier blade 40, the rotation center of the barrier blade 40 (second rotation center C2), the drive pin 51c of the rotor 51, and the rotation center of the rotor 51 (first rotation center C1) is shown in FIG. As shown in FIGS. 5 to 8, the center line L1 of the long hole 40b of the barrier blade 40, the normal L2 perpendicular to the center line L1 and passing through the drive pin 51c, the first rotation center C1 of the rotor 51, and the barrier blade 40 Is defined as follows using a straight line L3 passing through the second rotation center C2.

That is, as shown in FIG. 5, when the drive pin 51c is not in contact with the stopper 10e and is in the middle of the operating range, and when the barrier blade 40 is in the closed position for closing the opening 10a, the long hole 40b is The intersection point P between the normal line L2 and the straight line L3 is formed on the first rotation center C1.
In this state, the pressure angle formed by the normal line L2 of the long hole 40b and the moving direction of the drive pin 51c (the tangential direction of the circumference passing through the drive pin 51c) is the largest (90 degrees), and an external force such as an impact force is generated. Even if the barrier blade 40 is about to move due to F, the drive pin 51c cannot move because the pressure angle is large, and the barrier blade 40 cannot be moved and is held in the closed position.
In this state, since the driving force is transmitted from the drive pin 51c to the barrier blade 40, the barrier blade 40 also moves when the drive pin 51c moves.

Further, as shown in FIG. 6, when the drive pin 51c is in contact with the stopper 10e and is at one moving end position in the operating range, and the barrier blade 40 is located at the closed position for closing the opening 10a, the long hole 40b is formed. Means that the intersection P between the normal L2 and the straight line L3 is located outside the first rotation center C1 as viewed from the second rotation center C2, that is, deviates from between the first rotation center C1 and the second rotation center C2. The first rotation center C1 is formed on the opposite side of the second rotation center C2.
In this state, the pressure angle formed by the normal L2 of the long hole 40b and the moving direction of the drive pin 51c (the tangential direction of the circumference passing through the drive pin 51c) is smaller than the state shown in FIG. Although the long hole 40b exerts a cam action to move the driving pin 51c to the closing side when the barrier blade 40 tries to move to the opening side due to the external force F, the driving pin 51c is already in contact with the closing side stopper 10e and cannot move. Since it is possible, the barrier blade 40 cannot move and is held in the closed position as it is.

Further, as shown in FIG. 7, when the drive pin 51c is not in contact with the stopper 10e and is in the middle of the operating range, and the barrier blade 40 is located at the open position where the opening 10a is opened, the long hole 40b is The intersection point P between the normal line L2 and the straight line L3 is formed on the first rotation center C1.
In this state, the pressure angle formed by the normal L2 of the long hole 40b and the moving direction of the drive pin 51c (the tangential direction of the circumference passing through the drive pin 51c) is the largest (90 degrees), and the impact force or the like Even if the barrier blade 40 is about to move due to the external force F, the drive pin 51c cannot move because the pressure angle is large, and the barrier blade 40 cannot move and is held in the open position as it is. Become.
In this state, since the driving force is transmitted from the drive pin 51c to the barrier blade 40, the barrier blade 40 also moves when the drive pin 51c moves.

Further, as shown in FIG. 8, when the drive pin 51c is in contact with the stopper 10f and is at the other moving end position of the operating range, and the barrier blade 40 is located at the open position where the opening 10a is opened, the long hole 40b Means that the intersection P between the normal L2 and the straight line L3 is located outside the first rotation center C1 as viewed from the second rotation center C2, that is, deviates from between the first rotation center C1 and the second rotation center C2. The first rotation center C1 is formed on the opposite side of the second rotation center C2.
In this state, the pressure angle formed by the normal L2 of the long hole 40b and the moving direction of the drive pin 51c (the tangential direction of the circumference passing through the drive pin 51c) is smaller than the state shown in FIG. Although the long hole 40b exerts a cam action to move the drive pin 51c to the open side when the barrier blade 40 tries to move to the closing side by the external force F, the drive pin 51c has already contacted the stopper 10f on the open side and cannot move. Since it is possible, the barrier blade 40 cannot move and is held in the open position as it is.

Next, the operation when this apparatus is mounted on a digital camera will be described with reference to FIGS.
First, in the housed state where the digital camera is not photographed, as shown in FIG. 6, the barrier blade 40 is positioned at a closed position for closing the opening 10a, and the lens optical system inside is protected. The drive source 50 generates a detent torque due to a magnetic attractive force in a non-energized state, restricts the drive pin 51c from moving, and holds the barrier blade 50 in this closed position.

In this closed state, when the impact force F is received due to the fall of the digital camera or the like, the barrier blade 50 tries to move to the open side, but the cam action of the long hole 40b directs the drive pin 51c to the stopper 10e on the close side. Thus, the movement of the barrier blade 40 is restricted, and the barrier blade 40 is held in the closed position as it is.
Further, in this closed state, when the barrier blade 40 is moved in a direction of excessive movement from the closed position (in a direction further away from the opening 10a) by the force applied from the outside, the barrier blade 40 is moved to the auxiliary stopper 10g. Since the excessive movement is regulated by contacting the blade, damage to the barrier blade 40, damage to the drive pin 51c (and the rotor 51), and the like can be prevented.

When the operator switches on the shooting standby state from this closed state, the drive source 50 is activated and the drive pin 51c rotates by a predetermined angle (operating angle θ). As shown in FIG. 5, the opening 10a is moved to the open position.
When the drive source 50 is de-energized, a detent torque is generated by a magnetic attractive force to restrict the drive pin 51c from moving, and the barrier blade 50 is held in this open position.

In this open state, when the impact force F is received due to the fall of the digital camera or the like, the barrier blade 50 tries to move to the closing side, but the cam action of the long hole 40b directs the drive pin 51c toward the stopper 10f on the opening side. Thus, the movement of the barrier blade 40 is restricted, and the barrier blade 40 is held in the open position as it is.
Further, in this open state, when the barrier blade 40 is moved in a direction that further moves away from the open position (in a direction further away from the opening 10a) by the force applied from the outside, the barrier blade 40 is moved to the auxiliary stopper 10h. Since the excessive movement is regulated by contacting the blade, damage to the barrier blade 40, damage to the drive pin 51c (and the rotor 51), and the like can be prevented.

  As described above, in this apparatus, the drive pin 51c is formed so as to reciprocate across the region connecting the first rotation center C1 and the second rotation center C2, and the long hole 40b of the barrier blade 40 is When the barrier blade 40 is located at the closed position or the open position, the intersection P between the normal line L2 perpendicular to the center line L1 and passing through the drive pin 51c and the straight line L3 passing through the first rotation center C1 and the second rotation center C2. Is formed so as to be positioned on the first rotation center C1 or outside the first rotation center C1 when viewed from the second rotation center C2, so that the barrier blade 40 closes the opening 10a or the opening 10a. Even if the barrier blade 40 tries to move in the opposite direction in response to an impact force or the like from the outside in the open position where the shutter is opened, the movement of the long hole 40b (normal line L2) of the barrier blade 40 and the drive pin 51c Since the pressure angle formed by the direction (rotation direction) is large and the long hole 40b has a cam action to press the drive pin 51c against the stoppers 10e and 10f, the force of the barrier blade 40 (the long hole 40b) pressing the drive pin 51c is the rotor. 51 cannot be rotated, and the barrier blade 40 can be held in a predetermined stop position (closed position or open position).

  Therefore, even if the apparatus is mounted on a digital camera or the like and receives an impact force due to dropping or the like, the barrier blade 40 is held at a predetermined position without moving freely, and an expected state can be secured. . Further, it is only necessary to define the long hole 40b of the barrier blade 40 and its rotation center (second rotation center C2), the rotation center of the rotor 51 (first rotation center C1), and the operation range (operation angle θ) of the drive pin 51c. Therefore, the structure can be simplified, and the apparatus can be reduced in size, cost, and weight compared to the prior art.

9 and 10 show another embodiment of the camera blade driving device according to the present invention, which is the same as the above embodiment except that the direction of the long hole of the barrier blade 40 is changed. Therefore, the same components are denoted by the same reference numerals and description thereof is omitted.
That is, in this embodiment, the barrier blade 40 ′ includes a circular hole 40a and a long hole 40b ′ as shown in FIGS. The long hole 40b 'is formed at a twisted position where the center line L1 does not pass through the rotation center (second rotation center C2) of the barrier blade 40'.

  Also in the apparatus according to this embodiment, as shown in FIGS. 9 and 10, the drive pin 51c reciprocates across the region connecting the first rotation center C1 and the second rotation center C2, as in the previous embodiment. When the barrier blade 40 'is in the closed position or the open position, the long hole 40b' of the barrier blade 40 'is perpendicular to the center line L1 and passes through the drive pin 51c and the normal line L2 Since the intersection P with the straight line L3 passing through the first rotation center C1 and the second rotation center C2 is formed outside the first rotation center C1 when viewed from the second rotation center C2, the barrier blade 40 ′ is formed. Even if the barrier blade 40 ′ is moved in the opposite direction by receiving an impact force or the like in the closed position for closing the opening 10 a or in the open position for opening the opening 10 a, the long hole of the barrier blade 40 ′ 40b '( The pressure angle formed between the normal line L2) and the moving direction (rotating direction) of the drive pin 51c is large, and the long hole 40b 'exerts a cam action that presses the drive pin 51c against the stoppers 10e and 10f. The force by which the hole 40b ′) pushes the drive pin 51c cannot rotate the rotor 51, and can hold the barrier blade 40 in a predetermined stop position (closed position or open position).

  Therefore, even when the apparatus is mounted on a digital camera or the like and receives an impact force due to dropping or the like, the barrier blade 40 'can be held at a predetermined position without moving freely to ensure an expected state. it can. Further, the long hole 40b ′ of the barrier blade 40 ′ and its rotation center (second rotation center C2), the rotation center of the rotor 51 (first rotation center C1), and the operating range (operating angle θ) of the drive pin 51c are defined. Therefore, the structure can be simplified, and the apparatus can be reduced in size, cost, and weight compared to the conventional one.

In the above-described embodiment, the barrier blades 40 and 40 'are shown as the blade members. However, the blade blades are not limited to this, but the shutter blades, the diaphragm blades, the ND filter blades, the infrared light cut filter blades, and the like. The present invention may be adopted in a configuration including:
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 of the present invention achieves the simplification of structure, cost reduction, size reduction, weight reduction, etc., while the blade member is in the closed position or the open position of the opening. Since it can be held securely and can be opened and closed with high accuracy without causing malfunction, it can be mounted on a small portable digital camera, etc. If the camera has a possibility of malfunction of the blade member, it is useful not only for a portable type but also for a fixed type camera.

It is a disassembled perspective view which shows one Embodiment of the blade drive device for cameras of this invention. It is a top view of the blade drive device for cameras shown in FIG. It is sectional drawing of the blade drive device for cameras shown in FIG. It is a top view explaining the operating range of the drive pin contained in the blade drive device for cameras shown in FIG. FIG. 2 is a plan view showing a state where the drive pin is located in the middle of the operating range and the barrier blade is in a closed position where the opening is closed in the camera blade driving device shown in FIG. 1 with the cover removed. FIG. 2 is a plan view showing a state in which the drive pin is in one moving end position of the operating range and the barrier blade is in a closed position where the opening is closed in the camera blade driving device shown in FIG. 1 with the cover removed. is there. FIG. 2 is a plan view showing a state in which the drive pin is located in the middle of the operating range and the barrier blade is in an open position where the opening is opened in the camera blade driving device shown in FIG. 1 with the cover removed. FIG. 2 is a plan view showing a state in which the drive pin is in the other moving end position of the operating range and the barrier blade is in an open position where the opening is opened in the state where the cover is removed in the camera blade drive device shown in FIG. 1. is there. 4 shows another embodiment of a camera blade drive device according to the present invention, in which the drive pin is at one moving end position in the operating range and the barrier blade closes the opening without the cover. It is a top view which shows the state in a position. 9 is a plan view showing a state in which the drive pin is in the other moving end position of the operating range and the barrier blade is in the open position where the opening is opened, with the cover removed, in the camera blade driving device shown in FIG. is there.

Explanation of symbols

C1 first rotation center (rotor rotation center)
C2 Second rotation center (rotation center of blade member)
L1 Long hole center line L2 Normal line perpendicular to the center line and passing through the drive pin L3 Straight line passing through the first rotation center and the second rotation center θ Driving pin operating angle (operating range)
P Intersection of normal and straight line 10 Ground plane (substrate)
10a Opening portion 10b Flat surface 10c Bearing hole 10d Support shaft 10e Closed side stopper 10f Opening side stopper 10g, 10h Auxiliary stopper 10i Accommodating recess 20 Auxiliary ground plate (substrate)
20a Bearing hole 20b Rectangular hole 30 Cover 30a Openings 30b, 30c, 30d Fitting hole 30e Arc-shaped holes 40, 40 ′ Barrier blade (blade member)
40a Circular holes 40b, 40b 'Long hole 50 Drive source 51 Rotor 51a Rotating shaft 51b Magnetized part 51c Drive pin 52 Yoke 52a, 52b Magnetic pole part 53 Bobbin 54 Coil for excitation

Claims (5)

A substrate having an opening, a drive source including a drive pin and a rotor that rotates about the first rotation center on the substrate, a long hole into which the drive pin is inserted, and a second on the substrate A blade driving device for a camera, comprising: a blade member that rotates between a closed position that rotates around a rotation center and closes the opening, and an open position that opens the opening;
The drive pin is formed to reciprocate across a region connecting the first rotation center and the second rotation center,
When the blade member is located in the closed position or the open position, the long hole is formed by a normal line perpendicular to a center line thereof and passing through the drive pin and straight lines passing through the first rotation center and the second rotation center. An intersection point is formed on the first rotation center or outside the first rotation center as viewed from the second rotation center.
A blade drive device for a camera. The substrate has a stopper for contacting the drive pin when the intersection is located outside the first rotation center.
The camera blade driving device according to claim 1, wherein The substrate has an auxiliary stopper that abuts the blade member to restrict the blade member from excessively moving from the closed position or the open position.
The camera blade driving device according to claim 2, wherein the camera blade driving device is provided. The operating range of the drive pin is formed so as to be approximately bisected by a straight line passing through the first rotation center and the second rotation center.
The blade driving device for a camera according to claim 2. The long hole is formed such that its center line passes through the second rotation center.
The camera blade driving device according to any one of claims 1 to 4, wherein the camera blade driving device is provided.

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