JP2001304206A - Holding mechanism for moving member, device having holding mechanism for moving member, and camera having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding mechanism for a moving member not needing troublesome regulation and to provide a holding mechanism for a moving member capable of containing in an adhesion state the moving member in a device body. SOLUTION: One end of a lock spring is brought into contact with a lock member and a securing mechanism is forced into contact with the other end side of the lock spring. During a securing state, by pushing in the lock spring by the securing mechanism during securing state, an energizing force by the lock spring is exerted on the lock member, which is held in a lock position. By releasing pushing-in of the lock member by the securing mechanism during release of a securing state, an energizing force on the lock member by the lock spring is rendered ineffective, the lock member is pushed in a release position and also moved to a protrusion position by the moving member through the force of the energization force of an energizing spring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for holding a movable member mounted on an apparatus main body, for example, a mechanism for holding a light emitting portion of a pop-up strobe mounted on an image pickup apparatus.

[0002]

2. Description of the Related Art Conventionally, as an image pickup apparatus, a type having a built-in strobe has been widely used in order to compensate for insufficient exposure at the time of photographing. In the image pickup device with a built-in strobe, the part where the strobe emits light (called the strobe light emitting part) can be moved, and when the strobe is not used, the strobe light emitting part is housed integrally on the outer surface of the device body. When a strobe is used, an imaging device having a pop-up strobe is widely known because a strobe light emitting portion is projected from the apparatus main body. This pop-up flash not only excels in design and portability, but also allows the flash unit to be moved away from the shooting optical axis when using the flash, preventing strobe light from vignetting at the tip of the shooting lens, It is highly advantageous in terms of functions, such as being able to reduce the so-called red-eye phenomenon, and has been widely used in imaging devices such as high-end cameras.

FIG. 16 shows a structure of a conventional image pickup apparatus using the pop-up strobe. 21 is a camera body. Reference numeral 22 denotes a strobe light emitting unit, which is rotatable between a storage position integrally stored in the camera main body 21 around a rotation shaft 23 and a protruding position protruding upright with respect to the camera main body 21. It is attached and is always urged by the urging spring 24 in the direction of the protruding position. 2
Reference numeral 5 denotes a locking plate for adjusting an engagement state with a hook lever 26 to be described later so as to minimize the gap between the flash unit 22 and the camera body 21 when the strobe light emitting unit 22 is in the storage position.
The strobe light emitting section 22 is controlled by the screw 25a and the screw 25b.
Mounted on 26 is a hook lever, which is a rotary shaft 2
At 6a, it is attached to the camera body 21 and is urged by a hook spring 27 so as to maintain the locked state with the locking plate 25.

[0004] Reference numeral 28 denotes a plunger unit, which includes a movable portion 28a, a coil 28c, and a permanent magnet 28b. The movable portion 28a is formed of a magnetic material, and is normally attracted to the permanent magnet 28b.
When power is supplied to the coil c, the suction is canceled by the electromagnetic force of the coil 28c, and the coil 28c becomes movable. The plunger unit 28 includes a hook lever 26 and a movable portion 28a.
The mounting position can be adjusted in the movable direction of the movable portion 28a with respect to the camera body 21 so as to optimize the distance to the camera body 21.

[0005] Reference numeral 29 denotes a charge lever, which is attached to the camera body 21 around a rotation shaft 29a.
A charge spring 30 for biasing 8a is incorporated. Reference numeral 31 denotes a charge pin which is pushed into the strobe light emitting unit 22 to urge the charge spring 30 when the strobe light emitting unit 22 is at the storage position.

Next, a description will be given of how the flash pop-up is performed with this configuration.

First, when the coil 28c is energized, the movable portion 28a becomes movable, and is pushed out by the charge spring 30, and the movable portion 28a moves the hook lever 26 by the ejected inertia force (inertia). To blow. Hook lever 26 hit by movable portion 28a
Rotates clockwise against the counterclockwise force of the hook spring 27. Thereby, the hook lever 26 and the locking plate 25
Is released, and the flash emission unit 22 is moved from the storage position to the protruding position by the biasing spring 24.

When the strobe light emitting section 22 moves to the projecting position, the pressing force on the charge pin 31 which has been pushed into the strobe light emitting section 24 is released. Next, the coil 28c
When the energization of the permanent magnet 28 is stopped,
It is sucked by the suction force of b and returns to the initial state.

Next, when the strobe light emitting unit 22 is moved from the projecting position to the storage position by an external force (manual), the charge pin 31 is pushed in by the strobe light emitting unit 22 and the charge lever 29 is rotated clockwise to charge. Spring 3
0 urges the movable portion 28a in the direction of the hook lever 26. However, since the coil 28c is not energized, the movable portion 28a is held in a state of being attracted by the attraction of the permanent magnet 28b. When the strobe light emitting unit 22 further reaches the storage position, the hook lever 26 is engaged with the locking plate 25 by the counterclockwise turning force, and holds the strobe light emitting unit 22 in the storage position even after external force is removed.

[0010]

Conventionally, hook lever 2
6 is dependent on the impact of the movable portion 28a that is pressed and actuated by the charge spring 30, this management is important. If the spring force of the charge spring 30 is too strong, the movable portion 28a Is easy to operate, and conversely, if the spring force is weak, the striking force applied to the hook lever 26 is insufficient, resulting in malfunction. Therefore, in order to obtain the optimal charging force by the charging spring 30, the mounting position adjusting mechanism of the plunger unit 28 is required. It was essential to perform the adjustment work in the installation and assembly process.

A hook spring 27 is provided to hold the hook lever 26 in the engaged state. However, the spring force of the hook spring 27 needs to be kept small enough not to hinder the striking force of the movable portion 28a. 10 at the tip of 26
Since only a rotation power of about 20 g could be applied, the hook lever 26 could not sufficiently lock the locking plate 25, and the hook lever 26 might come off the locking plate 25 carelessly. Was.

Further, since the engaging force of the hook lever 26 with the engaging plate 25 is weak, a tapered engaging claw that pulls the strobe light emitting portion 22 to the storage position by using the engaging force is provided. The hook lever 26 could not be prepared. For this reason, the strobe light emitting section 22 is forced externally (manually)
It is necessary to provide a sufficient clearance between the hook lever 26 and the locking plate 25 so that the hook lever 26 can be easily engaged with the locking plate 25 when the hook lever 26 is moved to the storage position.

If the amount of clearance is too large, a gap between the camera body 21 and the strobe light emitting portion 22 becomes noticeable when the strobe light emitting portion 22 is stored, thereby significantly degrading the quality of the camera. To become
Lock plate 2 so that the amount of clearance is necessary and minimized
It was indispensable to provide the mounting position adjusting mechanism 5 and perform the adjusting work in the assembling process.

On the other hand, as a drastic measure to solve the above-mentioned problems, a method has been proposed in which a power source such as a motor or a manual lever is used instead of using a tensioning member such as a plunger unit. However, when a power source such as the motor is used, a complicated gear mechanism is required and the cost and space cannot be reduced, and when a manual type is adopted, the camera cannot be automated and lacks responsiveness and quality. There was such a problem.

The present invention provides a new type of movable member holding mechanism that replaces the conventional type in order to solve the above-mentioned problems without any loss.

[0016]

In order to solve the above-mentioned problems, according to the present invention, a storage position which is attached to an apparatus main body and which is stored in the apparatus main body and a projecting position which protrudes from the apparatus main body are described. A movable member movable between the movable member, an urging spring for urging the movable member in the direction of the protruding position, a locking position for engaging the movable member and holding the movable member in the storage position, and the movable member. A locking member rotatable between a release position for releasing the engagement with the member, a locking spring in which one end of the two ends of the spring abuts the locking member, and a second end of the locking spring. A tensioning mechanism that is switchable between a tensioned state of pushing in and a tension release state of releasing the pushing of the other end of the locking spring, and when the tensioning mechanism is in the tensioned state,
When the tensioning mechanism pushes the other end of the locking spring, the locking member receives the urging force from the one end of the locking spring in the direction of the locking position, and is held at the locking position. When the tensioning mechanism is in the tension release state, the tensioning mechanism releases the pushing of the other end of the locking spring, so that the biasing force of the locking spring to the locking member is lost, and The rotation of the locking member to the release position is allowed, and the movable member pushes the locking member to the release position and moves to the protruding position by the urging force of the urging spring.

Therefore, the mechanism for holding the movable member can be simply realized without a difficult adjusting mechanism.

[0018] At least one of the distal end portion of the locking member and the locking portion provided on the movable member may include:
The engaging surface is provided with a second tapered portion, so that the movable member can be stored in close contact with the apparatus main body without any gap.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 shows a movable member holding mechanism according to a first embodiment of the present invention in an imaging apparatus equipped with a pop-up strobe light emitting section.

Reference numeral 1 denotes a camera body, which operates the entire camera. Reference numeral 2 denotes a strobe light emitting unit, which is attached to the camera body 1 so as to be rotatable about a rotation shaft 3 between a storage position and a protruding position, and is always urged by an urging spring 4 in the direction of the protruding position. ing. 2a is a locking portion, and a strobe light emitting portion 2
And are formed integrally with it.

Reference numeral 5 denotes a base plate having a shaft, a hole, and the like for mounting each component described later, and is installed inside the camera body 1. Reference numeral 6 denotes a hook lever, which is attached to a shaft 5a provided on the base plate 5, engages with the strobe light emitting unit 2, and engages with the locking unit 2a from a locking position for holding the strobe light emitting unit 2 in the storage position. Can be rotated clockwise or counterclockwise around the shaft 5a until the retracted position at which the engagement of is released. Reference numeral 6b denotes a first tapered surface, which is used when the strobe light emitting unit 2 is moved from the protruding position to the storage position.
The hook lever 6 is turned in the direction of the release position by being pushed by the locking portion 2a. Reference numeral 6c denotes a second tapered surface which, when the strobe light emitting unit 2 reaches the storage position, engages with the locking portion 2a to bring the strobe light emitting unit 2 and the camera body 1 into close contact.

A detection switch 7 detects the approach of the hook lever 6 when the hook lever 6 rotates and comes to a stop position, and sends a detection signal to a control unit (not shown) installed in the camera body 1. Send. The detection switch 7 is configured by a non-contact type switch, for example, a photo interrupter.

Numeral 8 denotes a locking spring, which is formed in a coil shape. A spring end 8b which is one end protruding long from the coil-shaped portion and a spring end portion 8b are formed. Spring end 8a which is the other end that is short and protrudes
Consists of The locking spring 8 is, as shown in FIG.
b is bent in the circumferential direction and fitted into a shaft 6 a provided on the hook lever 6. The spring end 8a contacts the first contact portion 6d of the hook lever 6, and the spring end 8b
Is in contact with the second contact portion 6e of the hook lever 6.

The unit in which the locking spring 8 is incorporated into the hook lever 6 does not require any special tools or adjustments in its manufacture, so that it can be easily manufactured only by hand.
In addition, it can be manufactured in a small space.

Reference numeral 9 denotes a plunger, as shown in FIG.
A movable portion 9a made of a magnetic material, a permanent magnet 9b for attracting the movable portion 9a, and a permanent magnet 9b
And a positioning pin 9d and a positioning pin 9e. The plunger 9 is positioned by inserting positioning pins 9d and 9e into positioning holes 5b and 5c provided in the base plate 5, and is fixed to screw holes 5d and 5e of the base plate 5 through the holes 9f and 9g. It is fixed to the base plate 5 by screwing.

A tensioning lever 10 has a pin 10a, a tip 10b, and a balancer 10c, and is rotatably mounted on a shaft 5f provided on the base plate 5. The pin 10 a is engaged with the movable portion 9 a of the plunger 9, and the tip 10 b is in contact with the spring end 8 b of the locking spring 8. The balancer portion 10c is provided on the side facing the pin 10a with the shaft 5f interposed therebetween. When gravity is applied in a direction in which the movable portion 9a of the plunger 9 is separated from the permanent magnet 9b due to an external impact or the like, for example, When the imaging device is turned upside down or the like, the movable portion 9a is turned by the permanent magnet 9b by rotating the tension lever 10 clockwise.
Plays a role in preventing it from falling off. The balancer unit 1
Although 0c may be manufactured separately, if it is manufactured as an integral structure using the structural material of the tensioning lever 10, the manufacturing cost can be reduced. If it is desired to make the mass of the balancer section 10c heavier, a metal material or the like may be separately attached to the balancer section 10c.

Next, a description will be given of how the strobe light-emitting portion 2 as a movable member moves from the storage position to the protruding position in the above configuration.

FIG. 4 shows the structure when the strobe light emitting unit 2 is in the storage position.

The movable part 9a fixes the tension lever 10 via the pin 10a by being attracted to the permanent magnet 9b. When the tensioning lever 10 is fixed, the tensioning lever 1
The spring end 8b that is in contact with the leading end 10b is pressed counterclockwise and separates from the second contact 6e. As a result, a reaction force is generated in the spring end 8b in the clockwise direction. This reaction force is applied to the hook lever 6 from the spring end 8a, which is the other end of the locking spring 8, via the first contact portion. , A counterclockwise turning force is generated in the hook lever 6.

The hook lever 6 engages with the engaging portion 2a via the second tapered surface 6c by utilizing the counterclockwise turning force.

Here, the strobe light emitting portion 2 formed integrally with the locking portion 2a is urged in the direction of the projecting position by the urging spring 4, so that the strobe light emitting portion 2 is held at the storage position. For this purpose, the counterclockwise turning force of the hook lever 6, that is, the force for engaging with the locking portion 2a needs to be larger than the force of the urging spring 4 for urging the strobe light emitting portion 2 to the projecting position. .

When such a force relationship is established, the hook lever 6 is engaged with the locking portion 2a, so that the strobe light emitting portion 2 integrated with the locking portion 2a is held at the storage position. You.

Next, when the coil 9c is energized under the control of the camera body 1 in a state where the strobe light emitting section 2 is in the storage position, the permanent magnet 9b which has attracted the movable section 9a
Is canceled out by the electromagnetic force generated by the coil 9c, and the movable portion 9a does not attract the pin 10a of the engaging lever 10 that is engaged.

As a result, the tensioning lever 10 becomes rotatable, and starts to rotate counterclockwise by being pushed by the reaction force from the spring end 8b of the locking spring 8.

As shown in FIG. 5, the tensioning lever 10 rotates counterclockwise and the spring end 8b is moved to the second position of the hook lever 6.
When the second contact portion 6e comes into contact with the contact portion 6e, the reaction force of the spring end portion 8b which has been received by the distal end portion 10b of the tensioning lever 10 is received by the second contact portion 6e. Here, since the other spring end 8a of the locking spring 8 is in contact with the first contact portion 6d of the hook lever 6, the second contact portion 6e exerts a clockwise spring force from the spring end 8b. At this point, the spring force of the locking spring 8 in both rotation directions is canceled via the hook lever 6. As a result, the turning force in the counterclockwise direction of the hook lever 6 used to engage with the locking portion 2a disappears.

When the turning power of the hook lever 6 in the counterclockwise direction disappears, the force for engaging the locking portion 2a of the hook lever 6 disappears, and the urging spring 4 urges the hook lever 6 in the direction of the protruding position. The stroboscopic light emitting unit 2 pushes up the second tapered surface 6c via the locking portion 2a to rotate the hook lever 6 clockwise. When the hook lever 6 rotates to the release position where the engagement with the locking portion 2a is released as shown in FIG. 6, the strobe light emitting portion 2 is thereafter moved to the protruding position by the urging force of the urging spring 4. Stand still (shown in FIG. 7).

Next, when the power supply to the coil 9c of the plunger 9 is cut off by the control of the camera body 1 after a predetermined time, the attractive force of the permanent magnet 9b is restored, and the movable portion 9a
Is sucked. The movable part 9a is a mated pin 10a
Is rotated clockwise through the lever. When the tip 10b of the tensioning lever 10 that rotates clockwise presses the spring end 8b of the locking spring 8, the spring force of the spring end 8b is applied to the hook lever 6 via the spring end 8a.
, The hook lever 6 rotates counterclockwise. The movable portion 9a of the plunger 9 has a permanent magnet 9 as shown in FIG.
It reaches the position adsorbed by b. On the other hand, the hook lever 6 rotates counterclockwise to reach the locking position, but since the strobe light emitting unit 2 has moved to the projecting position and there is no locking unit 2a at the locking position, the locking position is set. It turns to a stop position further clockwise and stands still. When the hook lever 6 reaches the stop position, the detection switch 7 detects the hook lever 6. At this time, since the detection switch 7 detects the approach of the hook lever 6 in a non-contact manner, the turning power of the hook lever 6 is not hindered. The detection switch 7 that has detected the approaching hook lever 6 outputs to a control unit (not shown) provided in the camera body 1, and upon receiving this output, the control unit determines that the strobe light emitting unit 2 is at the projecting position. I do. Thus, the strobe does not emit light when the strobe light emitting unit 2 is in the storage position, and the strobe functions normally. If the detection switch 7 is installed in the vicinity of the hook lever 6, a detection function can be provided inside the series of holding mechanisms. Therefore, it is necessary to protrude and install a device having the detection function on the exterior of the camera body 1. And the detection function does not depend on other parts.

Next, a description will be given of how the strobe light-emitting portion 2 as a movable member is operated by an external force (manually) from the projecting position to the storage position.

When the strobe light emitting section 2 is pushed back from the projecting position to the storage position, the locking section 2a comes into contact with the first tapered surface 6b of the hook lever 6, as shown in FIG. further,
When the strobe light emitting unit 2 is pushed back toward the storage position, the first tapered surface 6b is pushed by the locking unit 2a, so that the hook lever 6 rotates clockwise. Here, since the tensioning lever 10 is fixed by the movable portion 9a of the plunger 9 via the pin 10a, the spring end 8b that is in contact with the tip 10b of the tensioning lever 10 is in contact with this. It does not rotate clockwise from the position. When the hook lever 6 rotates clockwise in a state where the spring end 8b is fixed to the distal end 10b, the spring end 8b separates from the second contact portion 6e as shown in FIG. 6, a counterclockwise turning force is applied through the spring end 8a.

When the strobe light emitting portion 2 is further pushed back toward the storage position, the locking portion 2a comes into contact with the second tapered surface 6c of the hook lever 6, as shown in FIG. The counterclockwise turning force of the hook lever 6 acts on the locking portion 2a via the second tapered surface 6c, thereby pulling the strobe light emitting portion 2 into the storage position against the urging force of the urging spring 4. If the hand is released as it is, the state returns to the state shown in FIG. 4, and the strobe light emitting unit 2 is pulled into the hook lever 6 and comes into close contact with the camera body 1 and stops. If the coil 9c is in a non-energized state,
Since the strobe light emitting unit 2 is maintained at the storage position, the strobe light emitting unit 2 can be stored without consuming power. Further, while the strobe light emitting section 2 is stored, the movable section 9 of the plunger 9 is caused by an external impact or the like.
The balancer portion 10c provided on the tensioning lever 10 even when gravity is applied in a direction in which the
In order to make the movable portion 9a close to the permanent magnet 9b by the clockwise rotation of the movable member 9 and to make the movable portion 9a hard to come off from the permanent magnet 9b, the strobe light emitting portion 2 is more stably connected to the camera body 1.
It is possible to store in. (Second Embodiment) FIG. 12 shows a movable member holding mechanism according to a second embodiment of the present invention.

In this embodiment, an adjusting mechanism is provided so that the reaction force from the locking spring 8 applied to the tensioning lever 10 can be varied.

1 is a camera body, 2 is a strobe light emitting section, 3
Is a rotary shaft, and 4 is an urging spring, which are the same as in the first embodiment.

Reference numeral 5 denotes a base plate, as in the first embodiment.
A hook lever 6 to which a locking spring 8 is attached is rotatably supported by a shaft 5a, and a detection switch 7 is attached.

Reference numeral 11 denotes a holder having a shaft, a hole, and the like for mounting each component described later. The holder 11 is positioned by inserting the holder shaft 11a into the mounting hole 5g of the base plate 5, and is screwed around the hole so as to be rotationally adjustable to the screw holes 5h and 5i via the elongated holes 11b and 11c. I have.

Reference numeral 9 denotes a plunger which has the same components as those of the first embodiment, and has positioning pins 9d and 9e provided in positioning holes 11d and 11d provided in the holder 11.
e, and is positioned and inserted into holes 9f and 9g and fixed to screw holes 11f and 11g of the holder 11 and screwed.

A tensioning lever 10 has the same components as in the first embodiment, and is rotatably mounted on the holder shaft 11a. The pin 10 a is engaged with the movable portion 9 a of the plunger 9, and the tip 10 b is in contact with the spring end 8 b of the locking spring 8.

The movable part 9a of the plunger 9 is a permanent magnet 9b
, The tensioning lever 10 is fixed via the pin 10a. Also, the tip 10b of the tensioning lever 10
Since the spring end 8b is pressed, the spring end 8b does not come into contact with the second contact portion 6e of the hook lever 6 and is in a floating state and is stationary.

In this embodiment, the plunger 9 and the tensioning lever 10 are not directly attached to the base plate 5, but the plunger 9 and the tensioning lever 10 are attached to the holder 11, and then the holder 11 is attached to the shaft of the tensioning lever 10. By being attached to the base plate 5 so as to be pivotally adjustable about the position, the locking spring 8 received by the distal end portion 10b of the tensioning lever 10
Can be made variable.

In this embodiment, a series of operations of the movable member are the same as those described in the first embodiment.

Next, in this embodiment, the holder 11
The rotation adjustment will be described.

When the strobe light emitting section 2 is in the retracted position (shown in FIG. 13), at the contact point between the tip 10b of the tensioning lever 10 and the spring end 8b, the tensioning lever 10 is turned clockwise by the locking spring 8. To the tip 1 by the moment (Ms)
Since the urging force (P) is received at 0b, a clockwise rotational moment (Ml) is required to generate a reaction force (P ') against the urging force (P). For this purpose, the movable portion 9a of the plunger 9 engaged with the pin 10 must exert a suction force (Pk) on the pin 10a.

From this, the following relational expression is derived.

Ms = Ps * Rs (1) P = P ′ = Ps / cos θs = P1 / sin θ1 (2) Ml = Pl * R1 = Pp * Rp (3) Pk = Pp * Cos θk (4) where, Ps; of the force that the tip 10b receives from the spring end 8b at the contact point, the force is received in the direction perpendicular to the line connecting the center point of the shaft 5a and the contact point. Power.

Pl: the force in the direction of gravity, of the force (P ') received by the spring end 8b.

Rl: linear distance from the center point of the holder shaft 11a to the contact point.

Rp: linear distance from the center point of the holder shaft 11a to the center point of the pin 10a.

Rs: linear distance from the center point of the shaft 5a to the contact point.

Θs: interior angle formed between a line connecting the center point of the shaft 5a and the contact point and a straight line of the spring end 8b.

Θl: interior angle formed between a line connecting the center point of the holder shaft 11a and the contact point and a vector line of force (P).

From the above equations (1) to (4), the following equation is obtained: ∴Pk = Ms * (Rl * sin θl * cos θk) / (Rs * Rp * cos θs) (5)

The following actually measured values based on the shape shown in FIG. 13 are substituted into the equation (5).

Ms = 1200 (g · mm) Rs = 5.4 (mm) θs = 26.2 (degrees) θl = 10.2 (degrees) Rl = 9.0 (mm) Rp = 5.4 (mm) ) Θk = 10.7 (degrees) ∴Pk = Ms * (R1 * sinθ1 * cosθk) / (Rs * Rp * cosθs) = 1200 * [9.0 * sin (10.2) * cos (10.7) )] / [5.4 * 5.4 * cos (26.2)] = 71.8 (g) From this, the movable portion 9a of the plunger 9 exerts the suction force (P
k) = 71.8 (g) is required.

The mounting angle of the holder 11 is shown in FIG.
When adjusted as shown in the following, Ms = 1215 (g · mm) Rs = 5.9 (mm) θs = 24.0 (degrees) θl = 5.3 (degrees) Rl = 9.0 (Mm) Rp = 5.4 (mm) θk = 10.7 (degrees) ∴Pk = Ms * (R1 * sinθ1 * cosθk) / (Rs * Rp * cosθs) = 1215 * [9.0 * sin ( 5.3) * cos (10.7)] / [5.9 * 5.4 * cos (24.0)] = 34.1 (g).

That is, the movable portion 9a of the plunger 9
A suction force (Pk) = 34.1 (g) is required, and the holder 11
Suction force before adjusting the mounting angle (Pk = 71.8)
It can be seen that it is almost halved compared to (g)).

When the mounting angle of the holder 11 is θl = 0.
If adjusted so as to be (degrees), the suction force Pk = 0 from the above equation (5), and the movable member 2 can be held without the suction force (Pk) required for the movable portion 9a of the plunger 9. it can.

When the coil 9c of the plunger 9 is not energized, the attraction force of the permanent magnet 9b to attract the movable portion 9a is (P
1), and assuming that (P2) is a residual attraction force by which the permanent magnet 9b attracts the movable portion 9a when the coil 9c is energized, an attraction force (P1)>(Pk)> (P2) is established. If the plunger 9 has (P1) and (P2), the strobe light emitting unit 2 as a movable member can be kept housed or sometimes protruded. That is, when the coil 9c is not energized, the movable portion 9a is attracted by a force equal to or greater than the attraction force (Pk), thereby generating a counterclockwise turning force on the hook lever 6 as described above. The lever 6 can continue to engage with the strobe light emitting unit 2. Also, the coil 9
As described above, when the power is supplied to c, the counterclockwise rotating force generated on the hook lever 6 is extinguished, and the strobe light emitting unit 2 that is no longer locked by the hook lever 6 releases the urging force of the urging spring 4. It can be moved to the projecting position by receiving.

On the other hand, in the process of moving the strobe light emitting unit 2 from the projecting position to the storage position, as shown in FIG.
There is a point in time when the hook lever 6 reaches the release position while the movable portion 9a of the plunger 9 is attracted to the permanent magnet 9b, and this state will be considered below.

As shown in FIG. 15, the hook lever 6 has a turning force in the counterclockwise direction. However, since the hook lever 6 is pushed clockwise by the locking portion 2a, the locking spring 8 at this time is rotated. Is larger than the moment of the locking spring 8 when the hook lever 6 is at the locking position, and the maximum value (Ms')
Is shown. In the locking spring 8 under the same conditions as the structure shown in FIG. 13, the maximum moment (Ms') = 1338 (g)
Mm). That is, Ms' = 1338 (g · mm) Rs = 5.4 (mm) θs = 26.2 (degrees) θl = 10.2 (degrees) Rl = 9.0 (mm) Rp = 5.4 (mm) ) Θk = 10.7 (degrees). When this is introduced into the equation (5), Pk ′ = Ms ′ * (R1 * sin θl * cos θk) / (Rs * Rp * cos θs) = 1338 * [9. 0 * sin (10.2) * cos (10.7)] / [5.4 * 5.4 * cos (26.2)] = 80.1 (g).

That is, the maximum suction force required for the movable portion 9a of the plunger 9 increases to (Pk ') = 80.1 (g). If the maximum attraction force (Pk ′) exceeds the attraction force (P1) of the movable portion 9a when the coil 9c is not energized, at this point, the attraction of the movable portion 9a of the plunger 9 from the permanent magnet 9b is released. . As a result, the turning power of the hook lever 6 in the counterclockwise direction is lost, and the strobe light emitting unit 2 cannot be held at the storage position. In order to prevent such a situation, the relationship of (P1)> (Pk ') must also be established.

As described above, since the moment (Ms') is always larger than the moment (Ms), the attraction force (Pk ') at the moment (Ms') is always larger than the attraction force (Pk) at the moment (Ms). .

Accordingly, the condition for satisfying all of the series of operations of the movable member holding mechanism in the present invention is as follows: (P1)> (Pk ′)>(Pk)> (P2) The adjusting mechanism in the present embodiment can rotate the tensioning lever 10 and the plunger 9 integrally by simply adjusting the mounting angle of the holder 11, so that the suction force (Pk) required for the movable portion 9a by a simple adjusting operation. Can be adjusted optimally.

When the movable member holding mechanism according to the present embodiment is actually used, it is necessary to adjust the mounting angle of the holder 11 in consideration of the frictional force generated in each part and the variation in quality. From experiments, it was found that the second contact portion 6e of the hook lever 6 and the tip 10b of the tensioning lever 10
The frictional force generated at the time is a suction force (P
k) tends to attenuate, and it has been found that the mounting position of the holder 11 is deflected counterclockwise from the mounting position obtained by calculation. For this reason, when attaching the holder 11, it is necessary to take measures such as expanding the adjustment angle in advance in consideration of the counterclockwise deflection in addition to the attachment position obtained by calculation.

In the trial production stage of the product, the optimal mounting position of the holder 11 provided with the tensioning lever 10 and the plunger 9 is adjusted according to the second embodiment in consideration of the external factors such as the frictional force. In the step of manufacturing the product, it is also possible to manufacture a product in which the positions of the tension lever 10 and the plunger 9 are fixed as in the first embodiment, based on the position of the holder 11 adjusted according to the second embodiment. .

[0074]

As described above, according to the first aspect of the present invention, when the movable member is at the storage position, the movable member and the locking member are securely engaged, and the movable member is moved from the storage position to the projecting position. To move the movable member to the protruding position only by moving the tensioning mechanism to the tensioned state when moving it to the movable member holding mechanism without a difficult adjustment mechanism,
It can be realized simply.

Further, according to the second invention of the present application,
It is not necessary to adjust the position of the locking portion that engages with the locking member.

Further, according to the third invention of the present application,
The locking member can be configured in a space-saving manner, and the locking member and the locking spring can be easily assembled.

Further, according to the fourth invention in the present application,
After the movable member has moved from the storage position to the protruding position, the locking member can be returned to the initial state where the engagement with the movable member is possible only by setting the tensioning mechanism to the tension release state.

Further, according to the fifth invention of the present application,
Simply by moving the movable member from the projecting position to the storage position manually or the like, the locking member and the movable member are engaged, and the movable member can be held at the storage position.

Further, according to the sixth invention of the present application,
When the movable member is moved to the storage position, the movable member can be held at the storage position in a state where the movable member is in close contact with the apparatus main body without any gap.

Further, according to the seventh invention of the present application,
The operation of releasing the engagement with the locking member by the operation of the tensioning mechanism can be performed more reliably.

Further, according to the eighth invention of the present application,
With a simple adjustment operation, the biasing force applied to the actuator from the locking spring can be adjusted optimally.

Further, according to the ninth invention of the present application,
It is possible to prevent the contact member from being pushed into the locking spring by receiving an external impact or the like, whereby the movable member can be stably held at the storage position.

Further, according to the tenth aspect of the present invention, the cost for manufacturing the balancer can be reduced.

Further, according to the eleventh invention of the present application, the cost and space of the entire holding mechanism can be reduced, and the power consumption of the actuator can be reduced.

Further, according to the twelfth aspect of the present invention, the state in which the movable member is at the projecting position can be reliably detected,
Further, the detection unit can be incorporated in the device main body without being exposed to the outside of the device main body.

Further, according to the thirteenth and fourteenth aspects of the present invention, it is possible to reliably detect the state in which the movable member is at the projecting position without hindering the turning force of the locking member.

Further, according to the fifteenth and sixteenth aspects of the present application, the above-mentioned movable member holding mechanism can be realized in a space-saving device.

[Brief description of the drawings]

FIG. 1 shows a structure of a movable member according to a first embodiment of the present invention.

FIG. 2 is an assembled state diagram of a hook lever and a locking spring according to the first embodiment of the present invention.

FIG. 3 shows a plunger according to the first embodiment of the present invention.

FIG. 4 shows the operation of the movable member according to the first embodiment of the present invention.

FIG. 5 shows how the movable member operates according to the first embodiment of the present invention.

FIG. 6 shows how the movable member operates according to the first embodiment of the present invention.

FIG. 7 shows how the movable member operates according to the first embodiment of the present invention.

FIG. 8 shows the operation of the movable member according to the first embodiment of the present invention.

FIG. 9 shows the operation of the movable member according to the first embodiment of the present invention.

FIG. 10 shows how the movable member operates according to the first embodiment of the present invention.

FIG. 11 shows the operation of the movable member according to the first embodiment of the present invention.

FIG. 12 shows a structure of a movable member according to a second embodiment of the present invention.

FIG. 13 illustrates a state of adjustment of a movable member according to the second embodiment of the present invention.

FIG. 14 illustrates a state of adjustment of a movable member according to the second embodiment of the present invention.

FIG. 15 illustrates a state of adjustment of a movable member according to the second embodiment of the present invention.

FIG. 16 shows a structure of a movable member in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Camera main body (device main body) 2 ... Strobe light emission part (movable member) 2a ... Locking part 3 ... Rotating shaft 4 ... Urging spring 5 ... Base plate 5a ...・ Shaft 5b ・ ・ ・ Positioning hole 5c ・ ・ ・ Positioning hole 5d ・ ・ ・ Screw hole 5e ・ ・ ・ Screw hole 5f ・ ・ ・ Shaft 5g ・ ・ ・ Mounting hole 5h ・ ・ ・ Screw hole 5i ・ ・ ・ Screw hole 6 ... Hook lever (locking member) 6a ... Shaft part 6b ... First tapered surface 6c ... Second tapered surface 6d ... First contact part 6e ... Second contact part 7 ... Detection switch (detection unit) 8 ... Locking spring 8a ... Spring end 8b ... Spring end 9 ... Plunger (actuator) 9a ... Movable part 9b ... Permanent Magnet 9c Coil 9d Positioning pin 9e Positioning pin 9f Hole 9g Hole 10 Tension lever (contact member) 10a Pin 10b Tip part 10c Balancer part 11 Holder 11a Holder shaft 11b Slot 11c Slot 11d ..Positioning hole 11e ・ ・ ・ Positioning hole 11f ・ ・ ・ Screw hole 11g ・ ・ ・ Screw hole 11h ・ ・ ・ Holder shaft 21 ・ ・ ・ Camera body 22 ・ ・ ・ Strobe light emitting part 23 ・ ・ ・ Rotating shaft 24 ・ ・・ Biasing spring 25 ・ ・ ・ Locking plate 26 ・ ・ ・ Hook lever 27 ・ ・ ・ Hook spring 28 ・ ・ ・ Plunger unit 28a ・ ・ ・ Movable part 28b ・ ・ ・ Permanent magnet 28c ・ ・ ・ Coil 29 ・ ・ ・ Charge Lever 30 ・ ・ ・ Charge spring 31 ・ ・ ・ Charge pin

Claims (16)

[Claims] A movable member attached to the apparatus main body and movable between a storage position housed in the apparatus main body and a protruding position protruding with respect to the apparatus main body; A biasing spring that biases the movable member in a direction, and is rotatable between a locking position that engages the movable member and holds the movable member in the storage position and a release position that releases the engagement with the movable member. A locking member, one end of which is in contact with the locking member, and a tension state in which the other end of the locking spring is pressed, and the pressing of the other end of the locking spring is released. A tensioning mechanism that is switchable between a tension-releasing state and a tension-releasing state. When the tensioning mechanism is in the tensioning state, the tensioning mechanism pushes the other end of the locking spring so that the engaging mechanism is pressed. The stop member receives an urging force from one end of the locking spring toward the locking position. When the tensioning mechanism is in the tension release state, the tensioning mechanism releases the pushing of the other end of the locking spring, whereby the locking member by the locking spring is released. There is no bias to
The movable member is allowed to rotate to the release position, and the movable member pushes the lock member to the release position and moves to the protruding position by the urging force of the urging spring. Holding mechanism. 2. The movable member holding mechanism according to claim 1, wherein the movable member is integrally provided with a locking portion that engages with the locking member. 3. The locking member includes: a shaft portion into which the locking spring is incorporated; a first contact portion with which one end of the locking spring contacts; and another end of the locking spring in a tension release state. The holding mechanism for the movable member according to claim 1, further comprising a second contact portion with which the side contacts, and rotatably supported by the shaft portion. 4. The locking member receives a biasing force from one end side of the locking spring when the locking mechanism switches to a tightened state after the engagement with the movable member is released. The mechanism for holding a movable member according to claim 3, wherein the mechanism rotates to a locking position side. 5. The first end of the locking member is pushed into the movable member when the movable member is moved from the protruding position to the storage position to rotate the locking member toward the release position. The holding mechanism for a movable member according to claim 3, further comprising a tapered portion. 6. The device according to claim 3, wherein at least one of the distal end portion of the locking member and the locking portion provided on the movable member has a second tapered portion on an engaging surface. 6. The holding mechanism for a movable member according to any one of claims 1 to 5. 7. The tensioning mechanism is rotatably supported, and includes a contact member having a distal end contacting the other end of the locking spring in a tensioned state, and a distal end of the contact member. The contact member is connected to a position where the other end of the locking spring is pushed in the tightened state, and is pushed to a position where the pushing of the other end of the locking spring is released in the released state. The holding mechanism for a movable member according to claim 1, further comprising: an actuator that allows rotation of the contact member. 8. The tensioning mechanism includes a holder that rotatably supports the contact member and fixes the actuator, and the holder supports a position where the contact member is rotatably supported. The position of attachment to the apparatus main body can be adjusted, and by adjusting this attachment position, the biasing force that the contact member receives from the locking spring can be changed. A holding mechanism for a movable member according to claim 7. 9. A balancer section that holds the contact member pressed in a tensioned state on a side opposite to the distal end portion across a position where the contact member is rotatably supported. The holding mechanism for a movable member according to claim 7, further comprising: 10. The movable member holding mechanism according to claim 9, wherein the balancer portion is formed integrally with the contact member. 11. The actuator according to claim 1, wherein the actuator is a plunger having a movable portion that can be protruded and retracted by switching between energization and non-energization. The holding mechanism for a movable member according to claim 7, wherein the holding member is fixed at a tension position where the contact member is tensioned, and is movable from the tension position when power is supplied. 12. A detection unit for detecting the locking member rotated to a stop position, and a control unit for receiving an output of the detection unit and determining that the movable member has moved to the protruding position. The mechanism for holding a movable member according to any one of claims 1 to 11, wherein: 13. The mechanism according to claim 12, wherein the detection unit detects the locking member without contacting the locking member. 14. The mechanism according to claim 13, wherein the detection unit is a photo interrupter. 15. An apparatus comprising the movable member holding mechanism according to claim 1. Description: 16. A camera comprising the movable member holding mechanism according to claim 1, wherein the movable member is a strobe light emitting unit.