JP2014164150A - Stroboscope popup mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that an exterior member is melted due to light emission heat accompanied by stroboscopic light emission by preventing the damage of a stroboscope-up detection pin and securing the stroke of the stroboscope-up detection pin in a stroboscope popup mechanism in which a stroboscope-up detection mechanism is disposed in a camera body.SOLUTION: A member for forwarding or retracing a stroboscope opening/closing detection pin is disposed at a part of a strobe case, and the shape forms a cam shape.

Description

  The present invention relates to a strobe pop-up mechanism, and more particularly to the arrangement of strobe pop-up mechanism components and a strobe device.

  Small electronic devices such as cameras and video cameras that have a built-in strobe device are generally popular. However, if the strobe device is built in the camera body, the camera body tends to become larger, but as much as possible. There is a demand for a compact camera body.

  For this purpose, the built-in strobe light emitting unit needs to be close to the photographing optical axis of the camera.

  However, if the strobe flash unit is very close to the optical axis of shooting, the shadows appear unnatural, and the red eye phenomenon is likely to occur. Since it is likely to occur, it is desirable that the strobe light emitting unit is as far away from the photographing optical axis as possible.

  Therefore, in a single-lens reflex camera with a built-in strobe device, a strobe light emitting unit is usually mounted directly above the pentaprism, and this strobe light emitting unit moves up and down between the storage standby position and the light emitting position. There are many things that make up.

  According to this configuration, the strobe light emitting unit is normally in the storage standby position, contributing to the camera's small portability, and can stand by at a light emitting position that is further away from the shooting optical axis only when using the strobe. It is an effective configuration.

  In this case, it is general that the strobe light emitting unit is moved up and down between the storage standby position and the light emitting position by a rotational movement around a hinge that is an engaging part between the strobe device and the camera body.

  This up / down operation is performed when the photographer intentionally presses the strobe up button installed on the camera when the photographer determines that the amount of light is insufficient for the subject or when he / she deliberately wants the flash to fire. In some cases, the strobe device is moved by the camera, or when the light passing through the lens is measured by the light receiving unit on the camera side and the exposure is determined to be not appropriate, the camera may automatically move the strobe device.

  In either case, a means for detecting that the strobe has been raised is provided in either the camera body or the strobe device so that it does not emit light when the strobe device is in the storage standby position.

  In the conventional example described in Patent Document 1, a configuration in which a strobe up detection switch is provided inside a camera body is known.

  According to this, the strobe device housing portion of the camera body is provided with a detection piece that is always urged toward the strobe device and protrudes from the strobe device housing portion toward the strobe device.

  A strobe up detection switch is provided inside the camera body at the base end of the detection piece, and the strobe up detection switch has a contact piece a and a contact piece b.

  When the strobe device is stored in the strobe storage position of the camera body, the detection piece is pressed by the strobe device, and the contact piece a and the contact piece b of the strobe up detection switch are separated from each other by the base end of the detection piece. Thus, it is determined that the flash is not emitting light.

  When the strobe device is moved to the light emitting position by the above-described means, the detection piece is urged to the outside of the camera by the urging force of the contact piece b of the strobe up detection switch, and the contact piece a and the contact piece of the strobe up detection switch When b is in a close contact state, it is determined that the flash light is emitted.

  Further, in the conventional example described in Patent Document 2, a configuration in which a strobe up detection switch is provided inside the strobe device is known.

According to this, in the strobe device, two leaf spring-like contact pieces are arranged as strobe up detection switches, and the base end sides thereof are arranged vertically so as to be parallel to each other.
The first contact piece located on the upper side has a shape with a contact portion whose tip is bent, and is fixed inside the strobe device.

  The second contact piece located on the lower side has a bent portion that is largely bent along the inner surface of the outer shape formed on the outer periphery of the center of the rotating shaft for the strobe to move from the storage standby position to the light emitting position. The end is engaged with a strobe rotating shaft fixed to the camera body and concentric with a hinge.

  Further, a switch operation pin for elastically deforming the second contact piece protrudes from the hinge portion.

  When the strobe device is stored in the strobe storage standby position of the camera body, the second contact piece is not in contact with the switch operation pin, and the first contact piece and the second contact piece are not in contact with each other. By holding this, it is determined that the flash is not emitting light.

  Further, in the process in which the strobe device is moved to the light emitting position by the above-described means, the switch operating pin is fixed to the camera body and does not move, so that the bent portion of the second contact piece approaches the switch operating pin. Become.

  When the strobe is raised to some extent, the end of the bent portion of the second contact piece comes into contact with the switch operation pin.

  When the strobe is further raised, the switch operation pin elastically deforms the bent portion of the second contact piece according to the rotation of the strobe device, so that the bent portion of the first contact piece and the second contact piece are connected. When the piece comes into contact, it is determined that it is in the strobe emission state.

  In addition, when the strobe device is raised from the storage standby position to the light emission position, the structure in which the rotation of the strobe device is stopped at the light emission position is, for example, as shown in Patent Document 3 by a pair of link levers straddling the pentaprism of the optical viewfinder. There is a way to stop the rotation. The link lever is supported by the shaft so that it can rotate at a position different from the rotation axis of the strobe device. When the strobe device is raised to the light emitting position, the strobe device is rotated by a pin attached to the end opposite to the rotation shaft. It is the structure which stops.

Japanese Patent Laid-Open No. 2003-186089 JP 2005-164933 A JP 2002-90826 A

  In the prior art disclosed in Patent Document 1, since the ground detection pin 202 plays an important role as the strobe opening / closing detection means, when the detection pin 202 is broken or bent, the strobe opening / closing detection is normal. Will not work.

  According to this configuration, when the strobe device is in the light emission position, the detection pin 202 penetrates the strobe device housing portion of the camera body and protrudes toward the strobe device, so that the photographer can easily touch the detection pin 202. Is possible.

  For example, when the photographer touches the detection pin 202 and the detection pin 202 is broken, the detection pin 202 is not pressed by the strobe device 201.

  In this case, since the contact piece 203b is always in a contact state without being separated from the contact piece 203a even in the strobe storage state, there is a problem that the strobe device is erroneously recognized as a light emission state. Further, if the detection pin 202 protrudes at the strobe light emission position, it cannot be said that the appearance is good.

  Further, in this configuration, the detection pin 202 is directly pressed using a part 201a of the exterior member of the strobe device, but the pressing portion is a place that is easily visible to the user at the light emission position.

  For this reason, when the strobe opening / closing operation is repeated, the exterior member and the detection pin 202 are always in contact with each other, and a part of the exterior member is scratched in a place that is easily visible to the user. There are also problems such as

  In order to avoid this problem, for example, when the detection pin 202 is to be moved to the vicinity of the strobe hinge rotation center 205, the movable stroke of the detection pin 202 according to the opening / closing rotation angle of the strobe device 201 cannot be sufficiently secured. It is difficult to establish a strobe open / close detection function.

  Therefore, Patent Document 2 discloses a strobe opening / closing detection means in which the detection pin is removed by having the strobe opening / closing detection means not in the camera body but in the strobe device.

  In the prior art disclosed in Patent Document 2, it is necessary to send the detection signal of the strobe detection switch to a control circuit board or a flexible board installed in the camera body by, for example, a flexible printed board (hereinafter abbreviated as "flexible") or a lead wire. .

  Generally, the lead wire path from the strobe device to the inside of the camera body uses a hinge hole that is an engaging portion between the strobe device and the camera body.

  However, the electrical connection from the strobe device to the camera's control circuit board and flexible cable is already at least about four lead wires for supplying power to the xenon tube for emitting the strobe light and for supplying power to the trigger coil. is necessary.

  In other words, in addition to the four lead wires that are already required, it is necessary to provide space for flexible and lead wires as signal transmission means for the strobe detection switch. In some cases, the hinge hole will be enlarged, and the camera will be enlarged accordingly. There is a need to.

  Also, when the signal transmission means of the strobe detection switch is a lead wire, as the number of lead wires is increased, the longer the number of lead wires, the more time is required, and there is a problem that the probability of assembly failure such as peeling or pinching of the lead wires increases. Leads to.

  In addition, the lead wire must follow the up / down operation of the strobe light emitting part, but the flexibility decreases as the number increases, and the followability is significantly reduced by curing the lead wire coating at low temperatures, There is a possibility that a situation may occur in which the strobe is not sufficiently raised to the light emission position and the original strobe light emission performance cannot be exhibited.

  Therefore, the object of the present invention is not to provide a strobe detection switch inside the strobe device, which is likely to cause a decrease in workability due to an increase in the number of lead wires or a malfunction at low temperatures, but a strobe detection inside the camera body. By proposing a configuration in which the detection pin is not easily damaged in the configuration in which the switch is provided, the problem is that the exterior member is melted by the light emission heat of the strobe in the strobe storage standby state.

  Further, in the prior art disclosed in Patent Document 3, since it is necessary to provide a pair of link arms, the strobe device becomes large and heavy. In addition, the number of parts such as link arms and pins has increased, and assembly and cost are also issues. In addition, there is a problem that a time lag until the strobe device emits light increases when the strobe device rotates to the light emitting position.

In order to achieve the above object, the strobe pop-up mechanism of the present invention includes:
An opening / closing member pivotally supported with respect to a shaft or hole provided in the camera body;
A light emitter provided in the opening and closing member;
A detection member for detecting whether the light emitter emits light;
A movable member for operating the detection member;
The movable member is movable when a part of the opening / closing member comes into contact with the rotation of the opening / closing member,
The movable member moves in the normal direction of the shaft or hole;
A part of the opening / closing member is formed into a cam shape having two or more different radii, and the movable member is advanced and retracted by utilizing a difference in radius.

  In addition, a fixing member that fixes the rotation of the opening / closing member provided in the camera body at the light emitting position and the opening / closing member to receive the fixing member when the opening / closing member rotates and opens to the light emitting position. When the opening / closing member is in a closed state, the elastic member is provided perpendicular to the optical axis of the camera body between the shaft and the fixing member. It is characterized by.

  Further, when the opening / closing member is rotated and opened to the light emitting position, the elastic member and the fixing member are in contact with each other so that a reaction force is applied to the inner side of the rotating shaft from the rotating tangential direction of the rotating shaft. And

  According to the present invention, in the strobe up mechanism having the strobe up detection mechanism inside the camera body, the strobe up detection pin is damaged by reviewing the arrangement of the strobe up detection pin and reviewing the shape of the member that moves it. Therefore, it is possible to solve the problem that the exterior member is melted by the light emitted by the strobe light emission. Further, it is possible to provide a strobe up mechanism having a rotation stop structure for a strobe device that is small and can suppress bounce when stopped.

1 is a perspective view of a digital single-lens reflex camera of Embodiment 1. FIG. FIG. 2 is a top view of the digital single-lens reflex camera according to the first embodiment. FIG. 2 is a top view in which some of the components of the digital single-lens reflex camera of the first embodiment are omitted. FIG. 3 is a perspective view showing the entire strobe pop-up unit according to the first embodiment. The figure which showed the case where the strobe device of the present Example 1 is in a storage standby state. The figure which abbreviate | omitted some components of FIG. FIG. 6 is a detailed cross-sectional view in which a slide member is enlarged in the AA cross section of FIG. 5. FIG. 3 is a detailed diagram illustrating a strobe up detection switch and a cam shape according to the first embodiment. The figure which showed the state from which the tension member of the present Example 1 carried out right rotation, and disengaged with a strobe device. The figure which showed the state which the strobe up detection pin of the present Example 1 approached the cam change point of the press part provided in the strobe device. The figure explaining the cam change point of the present Example 1. FIG. The figure which showed the state which the 1st biasing spring of the present Example 1 lost the spring force. The figure which showed the state which the strobe device of the present Example 1 stood to the light emission position. The figure which showed the state which the strobe up detection switch of the present Example 1 begins to operate | move. The figure which showed the rotation stop structure when the strobe device of the present Example 2 was closed. The figure which showed the rotation stop structure when the strobe device of the present Example 2 opens.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Example 1]
1 is a perspective view of the digital single-lens reflex camera of the first embodiment, FIG. 2 is a top view of the digital single-lens reflex camera of the first embodiment, and FIG. 3 is a part of the strobe device of the digital single-lens reflex camera of the first embodiment. It is a top view omitted.

  As shown in FIGS. 1 to 3, the digital single-lens reflex camera of the first embodiment can start and end the camera by a power switch 102 provided on the exterior member 101 of the camera body 100.

  When the user is in a shooting state, as shown in FIG. 1, the user grips a grip 103 that is a part of the exterior member 101 positioned on the right side when viewed from the photographer side. A release button 104 is provided at a position where it can be easily operated with an index finger in a state where the user holds the button.

  In the pressing direction of the release button 104, there are pressing ends at the first position and the second position. Generally, the shutter speed and the aperture value are determined at the first position, and the actual position is determined at the second position. Shooting action is performed.

  On the grip side at the top of the camera body, there is a mode dial 105 that can switch modes such as shooting mode, for example, auto mode that leaves all control to the camera, and manual mode that allows the photographer to finely set the shutter speed and aperture value. It has been.

  When the photographer selects the manual mode with the mode dial 105, for example, the main electronic dial 106, which is a dial operation member used when changing the setting of the aperture value or the shutter speed, the release button 104 and the mode dial are used. 105 is provided near the middle of 105, and after changing the setting by the main electronic dial 106 without changing the shooting position, it is possible to immediately start the shooting operation.

  Reference numeral 113 denotes a focus detection area selection button, which is operated when the photographer arbitrarily selects a focal point of a subject determined in advance by a camera function.

  Reference numeral 114 denotes an AF start button, which is a button for the photographer to start a focus detection operation (AF) of a lens (not shown) at an arbitrary timing.

  115 is a diopter adjustment dial that adjusts the autofocus frame (not shown) to the position where it can be seen most clearly when the photographer is looking through the viewfinder. Turn to adjust to the + side.

At the top of the camera body, a strobe device 107 is provided to compensate for the shortage of light in the shooting environment. When the power switch 102 is off, the camera body 100 is stored in the storage standby position. It is locked by a tension lever 126 that protrudes further.
116 at the upper center of the camera body is a washer that allows an external strobe with a high light emission capacity to be attached and detached when the photographer feels that the light intensity of the flash device 107 built in the camera body 100 is insufficient. is there.

  Here, a series of operations until the flash device 107 emits light when the photographer selects the auto mode with the mode dial 105 will be described below.

  When the release button 104 is pressed to the first position by the photographer, subject light is measured by a photometric sensor (not shown) provided near the viewfinder, and an appropriate shutter speed and aperture value are determined. .

  When it is determined that the subject light is lower than the predetermined luminance from the obtained photometric result, the drive that releases the tension lever 126 that locks the strobe device 107 so that the strobe device 107 stands up to the light emission position. The circuit works.

  A strobe device 107 is rotatably engaged with a rotation shaft 100 a provided in the camera body 100.

  Reference numeral 109 denotes a strobe up spring for applying an urging force for raising the strobe device from the storage standby position to the light emission position, and is installed on the outer periphery of the rotary shaft 100a. The strobe up spring 109 is not shown in FIGS. 5, 9, 10 and 11, which will be described later, for the sake of easy viewing.

  As shown in FIG. 3, in this embodiment, the tension lever 126 and the strobe up spring 109 are both installed in the left direction when viewed from the back of the camera shown in the figure.

  The tension lever 126 applies a force to lock the strobe device 107 to the back side of the paper, and the strobe up spring 109 applies a force to push the strobe device 107 to the front side of the paper. Therefore, when the tension lever 126 and the strobe up spring 109 are separately arranged on the left and right with respect to the optical axis center, a force is applied to the strobe device 107 in the twisting direction, and the strobe device 107 and the exterior member 101 are provided. The gaps become uneven and the appearance quality deteriorates.

  For this reason, it is desirable that the tension lever 126 and the strobe up spring 109 are disposed parallel to and coaxial with the optical axis.

In this embodiment, the tension lever 126 and the strobe up spring 109 are arranged in the left direction when viewed from the back of the camera, but there is no problem even if arranged in the right direction.
Thereafter, when the photographer presses the release button 104 to the second position, the mirror unit 180 is retracted to a predetermined position by a drive circuit (not shown) so that the subject light reaches an image pickup device (not shown). .

  Further, after that, a shutter (not shown) is opened and a strobe is emitted at a predetermined timing to irradiate the subject with appropriate light.

  When the photographer selects the manual mode with the mode dial 105, in addition to the above exposure operation, the camera body is prepared in case the flash device intentionally emits light when the photographer feels that the amount of light is insufficient. A strobe up button 110 is provided at the top of 100.

  Next, a strobe pop-up device that is a characteristic configuration of the present embodiment will be described in detail.

  In this embodiment, in order to consider the assembly workability of the strobe pop-up mechanism, the strobe pop-up component is configured as a unit. FIG. 4A is a perspective view of the strobe pop-up unit 120 viewed from the direction tilted from the front of the camera to the anti-grip side, and FIG. 4B is a perspective view of the strobe pop-up unit 120 viewed from the opposite side of FIG. .

  There is an attachment member 121 for unitizing each component, and there is a cover member 122 serving as a lid for the attachment member.

  In the present embodiment, the cover member 122 also functions as a receiving member such as an electrical mounting component or an operation member. For example, it has an attachment part 123 for an acoustic member such as a microphone and a speaker, and an attachment part 124 for a red-eye lamp for reducing red eyes by reducing the pupil by turning on just before strobe light emission. Furthermore, it has a button receiving portion 125 that is used when operating with a left hand during playback of an image that is mainly used without being used in a shooting state such as a menu button or an info button.

  FIG. 5 is a side view of the strobe pop-up unit 120 with the cover member 122 removed as viewed from the non-grip side when the strobe device 107 is in the camera storage standby position, and FIG. 6 is a strobe cover member of the strobe pop-up unit 120 shown in FIG. It is the side view which removed the attachment member 121. FIG.

  Reference numeral 126 denotes a tension lever as a tension member, and the tension lever locking portion 126b is engaged with a strobe device engaging portion 107b provided on the exterior portion 107a of the strobe device 107, so that the strobe device 107 is always stored and standby. It plays a role of maintaining the state.

  The tension lever 126 is rotatably held with respect to a shaft fixed to the mounting member 121 and is engaged with the strobe device 107 by a tension spring 127 installed on the outer peripheral portion of the rotation center shaft of the tension lever 126. The urging force is acting in the counterclockwise direction so as to hold the joint.

  Next, a mechanism for releasing the tension of the tension lever 126 holding the strobe storage standby position will be described.

  Reference numeral 128 denotes a self-holding type solenoid having a movable part (hereinafter referred to as a chip) 128a made of a magnetic material. The chip 128a is attracted by a permanent magnet 128b when energization to the coil is off, and energization to the coil is performed. If it is made, the attraction force disappears and the attraction by the permanent magnet 128b is released.

  Since the solenoid 128 does not have a return mechanism such as a spring inside, a mechanism for separating the chip 128a adsorbed by energization to the outside is required.

  A mechanism for separating the chip 128a will be described below.

  The strobe pop-up unit 120 has a first urging spring holding lever 129 that is rotatably held with respect to another shaft fixed to the mounting member 121. Reference numeral 130 denotes a first urging spring for applying an urging force in a direction in which the tip 128 a is separated from the solenoid 128, and is arranged on the outer periphery of the rotation center shaft of the first urging spring holding lever 129.

  The first urging spring holding lever 129 has a first spring receiving portion 129 a and a second spring receiving portion 129 b that hold the legs of the first urging spring 130.

  When the strobe device 107 is in the storage standby position, the first urging spring 130 has the first spring leg 130a of the first urging spring as shown in FIG. The first spring receiving portion 129a is in contact with the second spring leg portion 130b of the first biasing spring, and the second spring receiving portion 129b of the first biasing spring holding lever 129 is not in contact with the first spring receiving portion 129a. Is in contact with a slide member engaging portion 140a provided on the slide member 140 described later.

  Reference numeral 131 denotes a pin engaged with a hole of the exterior member 101 so as to be movable in the normal direction from the strobe rotation axis, and is pushed by the strobe device 107 when the strobe device 107 is in the storage standby position.

  In the vicinity of the pin 131, another second urging spring holding lever 132 is rotatably held with respect to the shaft fixed to the mounting member 121, and comes into contact with the end portion of the pin 131. The pin abutting portion 132a of the second urging spring holding lever and the first spring leg portion 133a of the second urging spring 133 disposed on the outer periphery of the rotation center axis of the second urging spring holding lever 132. Has a spring receiving portion 132b for holding.

  The second spring leg 133b of the second urging spring 133 is held by the mounting member 121.

  When the strobe device 107 goes to the storage standby position, the pin 131 is pushed by the strobe device 107, and the pin abutting portion 132a of the second urging spring holding lever 132 is pushed downward, so that the second The urging spring holding lever 132 rotates clockwise.

  The first urging spring holding lever 129 and the second urging spring holding lever 132 are provided with projections 129c and 132c at the same distance from the respective axes, and the projections 129c and 132c are provided on the respective projections 129c and 132c. An engaged plate-like link member 134 is provided.

  In this embodiment, the shape of the link member 134 is a plate shape. However, if the projections 129c and 132c are in a connected state, it is not necessary to be a separate member. There is no need to limit.

  As a result, the rotational force of the second biasing spring holding lever 132 is transmitted to the first biasing spring holding lever 129, and a separation force acts in the direction away from the solenoid 128 with respect to the chip 128a. Become.

  In the strobe storage standby position, the attracting force of the tip 128a by the permanent magnet 128b of the solenoid 128 is set to be stronger than the force of the first urging spring 130, so that a separation force is applied to the tip 128a. The chip 128a is also attracted and held by the permanent magnet 128b.

  Here, a mechanical component for moving the chip in parallel, which is a feature of the present embodiment, will be described.

  As shown in FIG. 6, in this embodiment, the spring foot 130b of the first biasing spring 130 does not directly contact the tip opening 128c provided in the tip 128a, but the tip opening 128c shown in the figure. The slide member 140 is engaged with the slide member engaging portion 140a provided on the slide member 140. The tip engaging shaft 140e of the slide member 140 is configured to engage with the tip opening 128c of the tip 128a.

  This is because when the spring foot 130b of the first urging spring 130 is directly engaged with the chip opening 128c, when the first urging spring 130 is a coil spring as in this embodiment, Due to the characteristics, a force in a tangential direction is applied to the engaging portion with the chip 128a, and therefore a force is always applied in an oblique direction to the chip 128a.

  However, since the tip 128a is held only by the attractive force of the permanent magnet 128b provided on the solenoid 128 when the strobe device 107 is in the storage standby position, it is sufficient for the direction parallel to the advancing / retreating direction of the tip 128a. Although the attractive force can be maintained, the attractive force is extremely reduced in the oblique direction.

  That is, when the first urging spring 130 is directly engaged with the chip opening portion 128c, the chip 128a is easily detached. For example, when an impact is applied to the camera body 100 from the outside unexpectedly, the chip 128a. Tends to separate from the solenoid 128. That is, since the tension lever 126 is easily released, a problem that the strobe device 107 stands up to the light emission position unintentionally occurs.

  Further, the tip 128a slides inside the solenoid 128, and when a load is repeatedly applied to the tip 128a in an oblique direction, the tip sliding portion is twisted and the tip 128a is moved back and forth inside the solenoid 128. There is also a problem that causes a malfunction due to being caught.

  Further, in many cases, since the material of both the chip 128a and the first biasing spring 130 is metal, metal powder is generated when the metals are rubbed with each other, and the mechanical mechanism is adversely affected, or the metal powder is electrically There is also a possibility that it may scatter to the mounted parts and cause an electrical short circuit.

  For this reason, the slide shaft 141 engaged with the attachment member 121 is arranged so as to be parallel to the traveling direction of the chip 128a.

  The slide member 140 is provided with an arm portion 140b that engages with the slide shaft 141, and the slide member 140 can be moved in parallel with the advancing / retreating direction of the chip 128a using the slide shaft 141 as a guide.

  In order to prevent the slide member 140 from tilting in the rotational direction with respect to the slide shaft 141, the slide member 140 is provided with a protrusion 140c engaged with the mounting member 121 to achieve a steadying effect.

  Next, the positional relationship among the first urging spring 130, the slide member 140, the tip 128a, and the tightening lever 126 will be described with reference to the view of the camera below in FIG.

  The spring leg portion 130 b of the first urging spring 130 is in contact with the slide member engaging portion 140 a of the slide member 140. This contact point is arranged in the vicinity of the central axis A of the slide shaft 141. By doing so, the moment in the direction in which the slide member 140 is twisted with respect to the slide shaft 141 can be made as small as possible, so that the slide member 140 can move more smoothly.

  Further, it is necessary to efficiently transmit the force of the first urging spring 130 to the leg portion 126a of the tension lever via the slide member 140.

  Therefore, the center axis B in the optical axis direction passing through the center of the contact portion between the foot 126a of the tension lever 126 and the slide member 140 is the center axis in the optical axis direction passing through the center of the tip engagement shaft 140e of the slide member 140. It is arranged between C and the central axis A. By doing so, when the slide member 140 pushes the tightening lever 126, the moment in the direction in which the slide member 140 is twisted with respect to the slide shaft 141 can be made as small as possible. That is, the force of the first urging spring 130 can be efficiently transmitted to the tension lever 126.

  In this embodiment, when an impact is applied to the camera body 100, the slide shaft 141 is separated from the exterior member 101 as much as possible from the optical axis center side of the camera body 100 in order to reduce damage to the slide shaft as much as possible. However, as long as the relationship of the above three axes is satisfied, it is not always necessary to place it at that location.

  FIG. 7 is a cross-sectional view taken along the line AA of FIG.

  The tip engaging shaft 140e of the slide member 140 is provided with a spherical protrusion 140d, and the tip opening 128c and the slide member 140 are set to be in point contact.

  When the tip engaging shaft 140e has a simple shaft shape, the tip 128a is pushed in an oblique direction depending on the accuracy of the components such as the tilting of the shaft. By providing the spherical protrusion 140d as in the present embodiment, it is possible to accurately apply a force in the parallel direction to the chip 128a.

  As another characteristic configuration of the present embodiment, as shown in FIG. 5, a pin 131 is disposed immediately below the strobe rotation center axis.

  The reason for this will be described below.

  When the strobe device 107 is in the storage standby position, that is, when the pin 131 is pressed, a force that pushes the pin 131 upward in the figure by the force of the compressed first biasing spring 130 is working. become.

  If the pin 131 is arranged on the subject side of the strobe rotation center axis, that is, in the left direction in the figure, a force by which the strobe device 107 is pushed by the push-up force of the pin 131 works. Further, when the pin 131 is arranged on the photographer side from the strobe rotation center axis, that is, in the right direction in the drawing, a force that pushes down the strobe device 107 is acted by the pushing force of the pin 131.

  In either case, as the pin 131 moves away from the strobe rotation center axis, the force increases by the lever principle.

  In such a case, since the gap between the strobe device 107 and the exterior member 101 of the camera body 100 widens in the former case, when the strobe device 107 is pushed from above, a problem occurs that the strobe device 107 rattles and the appearance quality is increased. Not preferable.

  Further, in this case, since the pin 131 protrudes from the exterior member 101 of the camera body 100 with the strobe device 107 standing at the light emitting position, it does not look good, and the photographer accidentally touches the pin 131. In some cases, the pin 131 may be damaged.

  On the other hand, in the latter case, the pressing force on the strobe device 107 increases, so that the force of the strobe up spring 109 needs to be increased by that amount in order to reliably push up the strobe device 107 to the light emitting position.

  However, if the force of the strobe up spring 109 is increased too much, the impact on a stopper (not shown) that determines the strobe light emission position will increase, so that every time the strobe is used, an unpleasant impact is given to the photographer. .

  As described above, it is desirable to dispose the pin 131 immediately below the strobe rotation center axis.

  Next, the pin 131 in the present embodiment has another role of utilizing the movement of the pin 131 in addition to the role of storing the separation force with respect to the chip 128a as described above.

  As shown in FIG. 6, in the vicinity of the pin 131, a detection switch 145 for detecting the up / down of the strobe is installed on the mounting member 121 in a state where it is mounted on the flexible cable 146. An arm 131a is provided so as to be able to contact.

  Therefore, in the strobe down state, the pin arm 131a comes into contact with the detection switch lever 145a to enter the switch detection state, and when the contact position between the pin 131 and the detection switch lever 145a is out of the switch detection area during the strobe up operation, Switch from strobe down state to non-down state.

  In this way, by providing the pin 131 with another role, a separate contact member that has been separately provided for strobe up / down detection becomes unnecessary, so that cost reduction and space saving can be realized. .

  However, when the pin 131 is disposed immediately below the strobe rotation center axis as described above, there is a problem that it is difficult to ensure the stroke of the pin 131.

  Therefore, the shape of the strobe device 107 that pushes the pin 131, which is another feature of the present embodiment, will be described.

  One of the roles of the pin 131 is to store the force of the first urging spring 130 for separating the chip using the movement as described above. Another role is to operate the detection switch 145 that detects strobe up / down, and in order to fulfill this role, it is necessary to secure a certain stroke of the pin 131.

  However, if the pin 131 is disposed immediately below the strobe rotation center axis and the shape of the strobe device 107 that pushes the pin 131 is concentric with the strobe rotation center axis, for example, it is difficult to move the pin 131.

  Therefore, in this embodiment, as shown in FIG. 8, in order to ensure the stroke of the pin 131, the cam portion 150 is provided for a part of the strobe device 107 that pushes the pin 131.

  In the present embodiment, the cam portion 150 has two types of cam shapes, a first cam 150a and a second cam 150b. The first cam 150a has a concentric shape with respect to the strobe rotation center.

  That is, when the pin 131 is in contact with the first cam region, the pin 131 does not advance or retreat regardless of the strobe opening / closing operation, and the spring force of the first biasing spring 130 may change during this time. I am trying not to.

Although the second cam 150b has an arc shape, the center of the second cam 150b is different from the center of rotation of the strobe. Therefore, when the pin 131 is in contact with this region, the pin 131 advances and retreats.
Note that the pressure angle between the second cam 150b and the pin 131 is set to be 30 degrees or less when the pin is in contact with the second cam region during the strobe up, and the second cam 150b Consideration is given to prevent damage to the pins.

  The switching positions of the shapes of the first cam 150a and the second cam 150b will be described later.

  Next, the releasing operation of the tensioning device shown in FIG. 9 will be described.

  When the camera is in the state shown in FIG. 5, if it is necessary to use the strobe device 107 for the photographer's intention or camera control, the solenoid 128 passes a lead wire (not shown) to a coil (not shown) for a certain period of time ( For example, the magnetic force applied to the chip 128a that has been attracted to the permanent magnet 128b until then becomes zero.

  As described above, since the first urging spring 130 held by the first urging spring holding lever 129 is in a state in which the spring force is stored by the pin 131, the tip 128a that has lost the suction force is shown in FIG. As shown, the slide member 140 is pushed in the direction of the foot 126a of the tension lever.

At this time, when converted into a force applied in the horizontal direction, the force of the first urging spring 130 is set to be stronger than the force of the tension spring 127, so that the leg portion 126 a of the tension lever is the slide member 140. Therefore, the tension lever 126 is rotated clockwise.
When the tightening lever 126 rotates clockwise, the engagement between the tightening lever locking portion 126b and the strobe device engaging portion 107b is released.

  When the engagement is released, the strobe device 107 starts to rotate clockwise by the force of a strobe up spring 109 (not shown).

  10 to 14 are views showing a state from when the strobe device stands up from the storage standby position to the light emission position.

  FIG. 10 is a view showing a state in which the strobe device 107 starts to rotate and the pin 131 has reached a position where the first cam 150a is switched to the second cam 150b.

  In the state of FIG. 10, it can be seen that the strobe device 107 has already passed through the tension lever locking portion 126b.

  In order to establish this, as shown in FIG. 11, the angle formed by the line connecting the strobe device engaging portion 107b from the strobe rotation center and the line connecting the tension lever locking portion 126b from the strobe rotation center is X When the angle between the line drawn vertically from the strobe rotation center and the line connecting the switching position of the first cam 150a and the second cam 150b from the strobe rotation center is Y, X <Y. Set.

  By doing so, there is no problem that the strobe device and the tightening lever 126 are caught before the strobe device 107 is completely pulled out of the tightening lever locking portion 126b, so that the strobe is not raised.

  When the pin 131 reaches the second cam 150b, the first urging spring holding lever 129 is rotated counterclockwise by the reaction force of the first urging spring 130, and together with the link member 134, The second urging spring holding lever 132 also rotates counterclockwise.

  Then, the pin 131 is pushed upward along the second cam 150b by the pin contact portion 132a of the second urging spring holding lever 132.

  Thereafter, as shown in FIG. 12, the second spring leg portion 130b of the first biasing spring 130 comes into contact with the second spring receiving portion 129b of the first biasing spring holding lever 129. The force of the 1 biasing spring 130 disappears.

  Then, since the tension lever 126 is always acted on by the tension spring 127 to rotate counterclockwise, the tension spring 127 is forced by the force of the tension spring 127 from this state to the strobe standing state. A rightward force acts on the portion 126a, and the slide member 140 and the tip 128a locked to the slide member are pushed rightward by this force, and then the tip 128a is attracted by the permanent magnet 128b of the solenoid.

  Thereafter, in accordance with this movement, the pin 131 is pushed up by the second urging spring 133, and the second urging spring holding lever 132 is rotated counterclockwise, together with the first biasing member via the link member 134. The first urging spring holding lever 129 that has lost the force of the urging spring 130 is also rotated counterclockwise and enters the strobe standing state shown in FIG.

  Next, the detection timing of the strobe up detection switch 145 will be described with reference to FIG.

  FIG. 14 shows a state from the state of FIG. 12 to the state of FIG. 13, and the pin 131 is pushed up along the second cam 150b by the strobe up operation. The detection switch lever 145a that has been pressed by the portion 131a gradually rises, and eventually switches to a state of being out of the detectable region defined for the detection switch.

That is, the timing at which the strobe up detection switch 145 switches from the strobe down state / light emission prohibition state to the strobe up state / light emission permission state is shown.
In the present embodiment, even when the pin 131 is disposed near the strobe rotation center axis, the movable stroke of the pin 131 can be sufficiently ensured by adjusting the shape of the cam portion 150.

  For this reason, it is possible to set the switch so that the strobe device 107 is sufficiently up so that the exterior member is not melted by the light emission of a light-emitting panel (not shown) provided at the tip of the strobe device 107. It becomes.

  In this embodiment, the stroboscopic pop-up mechanism is configured in units so that the assembly workability is taken into account. However, even when the above components are directly assembled to the camera body 100, the above means can obtain the same effect. Needless to say.

[Example 2]
Hereinafter, with reference to FIG. 15 and FIG. 16, a description will be given of an anti-rotation configuration in opening and closing the strobe device (opening / closing member) 107 according to the second embodiment of the present invention. In addition to the configuration of the first embodiment, the camera body 100 includes a pin-shaped fixing member 301 for fixing at the light emission position when the strobe device (opening / closing member) 107 rotates. Further, the strobe device (opening / closing member) 107 is provided with an elastic member 302 at a portion in contact with the fixing member 301. One set of the fixing member 301 and the elastic member 302 are arranged on both the left and right sides of the washer 116 at the center of the camera body 100.

  FIG. 15B is a schematic view showing a state in which the strobe device (opening / closing member) 107 in the prior art is closed. The elastic member 302 provided in the strobe device (opening / closing member) 107 is disposed horizontally with respect to the optical axis of a lens (not shown) attached to the camera body 100, and the frame 303 on which the elastic member 302 is disposed is disposed on the strobe. It is necessary to provide the device (opening / closing member) 107. FIG. 15A is a schematic view showing a state in which the strobe device (opening / closing member) 107 of the present invention is closed. The elastic member 302 provided in the strobe device (opening / closing member) 107 is an optical axis of a lens (not shown) attached to the camera body 100 between the rotation shaft 100 a of the strobe device (opening / closing member) 107 and the fixed member 301. It is arranged perpendicular to.

  Therefore, in the present invention, the frame 303 on which the elastic member 302 is disposed is not necessary, and the camera body 100 can be downsized.

  Next, FIG. 16 is a schematic view showing a state in which the strobe device (opening / closing member) 107 is opened and rotated to the light emitting position. When the strobe device (opening / closing member) 107 rotates to the light emitting position, the elastic member 302 of the strobe device (opening / closing member) 107 comes into contact with the fixing member 301 and stops at the light emitting position.

As shown in FIG. 16, the elastic member 302 comes into contact with the inner side of the rotating shaft 100a so as to apply a reaction force F from the tangential direction of the rotating shaft 100a. Therefore, since the force is divided by the normal direction force F ₂ of the rotating shaft 100a, the tangential direction force F ₁ is reduced, and bounce when the rotation of the strobe device (opening / closing member) 107 is stopped can be suppressed. .

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

100 Camera body 100a Rotating shaft 107 Strobe device (opening / closing member)
126 Tightening lever 127 Tightening spring 128 Solenoid 128a Tip 129 First biasing spring holding lever 129a First spring receiving portion 129b of the first biasing spring holding lever Second of the first biasing spring holding lever Spring receiving portion 130 First bias spring 130a First spring foot portion 130b of the first bias spring Spring second spring foot portion of the first bias spring 131 Pin 132 Second bias spring holding lever 132a Pin contact portion 132b of the second biasing spring holding lever Spring receiving portion of the second biasing spring holding lever 133 Second biasing spring 133a First spring foot portion 133b of the second biasing spring The second spring leg part of the urging spring 134 Link member 140 Slide member 140a Slide member engagement part 140b Slide member arm part 140c Slide member protrusion part 140d Slide member spherical shape Raised portion 140e chip engaging shaft 141 slide shaft 145 detection switch 145a detection switch lever 150 cam portion 150a first cam 150b second cam 301 fixed member 302 elastic member

Claims (4)

An opening / closing member pivotally supported with respect to a shaft or hole provided in the camera body;
A light emitter provided in the opening and closing member;
A detection member for detecting whether the light emitter emits light;
A movable member for operating the detection member;
The movable member is movable when a part of the opening / closing member comes into contact with the rotation of the opening / closing member,
The movable member moves in the normal direction of the shaft or hole;
A strobe pop-up mechanism characterized in that a part of the opening / closing member is formed into a cam shape having two or more different radii, and the movable member is advanced and retracted by utilizing a difference in radius.   The strobe pop-up mechanism according to claim 1, wherein the movable member is disposed immediately below the rotation center axis of the opening / closing member. When the opening and closing member that fixes the rotation of the opening and closing member provided in the camera body at the light emitting position and the opening and closing member rotates and opens to the light emitting position,
An elastic member provided on the opening / closing member for receiving the fixing member, and when the opening / closing member is in a closed state, the elastic member is interposed between the shaft and the fixing member. The strobe pop-up mechanism according to claim 1, wherein the strobe pop-up mechanism is provided perpendicular to the optical axis.   When the opening and closing member is rotated and opened to the light emitting position, the elastic member and the fixing member are in contact with each other so that a reaction force is applied to the inner side of the rotating shaft from the rotating tangential direction of the rotating shaft. The strobe pop-up mechanism according to claim 3.