JP2001209099A - Cartridge lid lock mechanism of camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cartridge lid lock mechanism of a camera which can prevent opening of the cartridge lid with a simple configuration, and does not give breakage to an internal mechanism even when a cartridge lid opening knob is operated forcibly. SOLUTION: The cartridge lid lock mechanism is equipped with a locking lever 22 for preventing opening of a cartridge lid 13, and a clutch mechanism 23 for transmitting the operation of the cartridge lid opening knob to the locking lever 22. The clutch mechanism 23 connects the cartridge lid opening knob and the locking lever 22 when a film is not pulled out from a film cartridge, and it cancels the link of the knob for cartridge lid opening and the locking lever 22 when the film is pulled out from the film cartridge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera cartridge lid locking mechanism for preventing a cartridge lid from being opened when a film is being pulled out of a film cartridge housed in a film cartridge chamber. .

[0002]

2. Description of the Related Art A conventional camera using a film cartridge has a problem that the film is exposed when the cartridge lid is opened while the film cartridge is mounted on the camera.

APS (Adv) proposed recently has been proposed.
In an advanced photo system camera, when the film is not loaded in the camera, the film is wound into a case up to the leader portion of the camera. After the film is loaded into the camera, the film is fed out of the cartridge by the film supply mechanism on the camera side, and the spool shaft is rotated. A so-called thrust-type film cartridge wound around is used.

In the case where such a thrust type film cartridge is used, if the user attempts to remove the film cartridge by opening the cartridge lid while the film is being pulled out from the cartridge, the film is not only exposed but also exposed. Also, there is a problem that the film is torn and the torn film remains in the camera.

Therefore, in such a camera,
A cartridge lid lock mechanism is employed to prevent the cartridge lid from being opened when the film is pulled out from the film cartridge stored in the film cartridge chamber. As a conventional cartridge lid lock mechanism, a mechanical lock mechanism and an electric lock mechanism are used.

The former mechanical lock mechanism mechanically locks a cartridge lid opening knob used to open a cartridge lid when a film is pulled out from a film cartridge stored in a film cartridge chamber. This prevents the cartridge cover opening knob from moving and prevents the cartridge cover from being opened.

On the other hand, the latter electric lock mechanism electrically determines whether or not the film is pulled out from the film cartridge stored in the film cartridge chamber by using a sensor or the like, and determines whether or not the film has been drawn out of the film cartridge chamber. When the film is pulled out of the cartridge, the lock mechanism is operated by driving a motor or the like to prevent the cartridge cover from being opened.

[0008]

In the above-mentioned mechanical lock mechanism, when the cartridge lid opening knob is forcibly operated in a state where the film is pulled out from the film cartridge housed in the film cartridge chamber, the cartridge lid is locked. The internal mechanism including the mechanism may be damaged.

On the other hand, in the above-mentioned electric lock mechanism, there is a problem that the cost of the product increases because the mechanical configuration becomes complicated and the number of parts increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has a simple structure, in which a cartridge lid is opened when a film is pulled out from a film cartridge stored in a film cartridge chamber. In addition, even when the cartridge lid opening knob is operated with the film being pulled out from the film cartridge housed in the film cartridge chamber, the internal mechanism including the lock mechanism is damaged. An object of the present invention is to provide a cartridge lid locking mechanism of a camera without any problem.

[0011]

According to a first aspect of the present invention, there is provided a camera having a film cartridge chamber for accommodating a film cartridge, and a cartridge lid for opening and closing a film cartridge passage in the film cartridge chamber. A lock member movable between an open-prohibited position that engages with the cartridge lid and prohibits its opening, and an open-permitted position that disengages with the cartridge lid and permits its opening; When the cartridge cover is opened, a cartridge cover opening knob for moving the lock member from the opening prohibition position to the opening allowable position, and when a film is not pulled out from the film cartridge stored in the film cartridge chamber. Connecting the cartridge lid opening knob and the lock member. And, when the the film cartridge housed with a film cartridge chamber film is pulled out, characterized by comprising a clutch mechanism for releasing the connection between the locking member and the cartridge cover release knob.

According to a second aspect of the present invention, in the first aspect of the present invention, the lock member has a locking portion at one end thereof which can be engaged with a locking claw formed on the cartridge lid. It consists of a lever.

According to a third aspect of the present invention, in the second aspect of the present invention, the clutch mechanism is configured to rotate a sun gear connected to the cartridge cover opening knob and about the same axis as the sun gear. A movable planet carrier, a planet gear supported by the planet carrier meshing with the sun gear, a gear portion meshable with the planet gear formed on the lock lever, and housed in the film cartridge chamber. When the film is not pulled out from the film cartridge, the planetary carrier can be rotated to a position where the planetary gear meshes with the gear portion of the lock lever with the rotation of the cartridge lid opening knob connected to the sun gear. And when a film is being drawn from the film cartridge stored in the film cartridge chamber, And a restricting mechanism for restricting the rotation of the planet carrier.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the regulating mechanism includes a driven gear that rotates in synchronization with a driving gear that rotates when winding or rewinding the film; Is arranged coaxially with the driven gear and abuts against the driven gear with a constant frictional force, and rotates between a position where the rotation of the planet carrier is restricted and a position where the rotation of the planet carrier is allowed. And a possible regulating member.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a camera to which the present invention is applied.

This camera uses an APS (Advanced)
In this camera, the film is wound into a case up to a leader portion at the tip of the camera, and after the film is loaded into the camera, the film is fed out of the cartridge by a film supply mechanism on the camera side, and the spool shaft is rotated. Wrapped around
A so-called thrust type film cartridge is used.

This camera has a film cartridge chamber 12 for accommodating a thrust type film cartridge in a camera housing 11 and a housing for opening and closing a film cartridge passage in the film cartridge chamber 12. A cartridge cover 13 hinged to the cartridge 11 and a cartridge cover opening knob 14 used to open the cartridge cover 13 are provided.

In such a camera, when the cartridge lid 13 is opened to take out the film cartridge while the film is being pulled out from the cartridge, not only the film is exposed, but also the film is exposed.
There is a problem that the film is broken and remains inside the housing 11 of the camera. For this reason, in this camera, the cartridge lid lock mechanism according to the present invention for preventing the cartridge lid 13 from being opened when the film is pulled out from the film cartridge stored in the film cartridge chamber 12. Has been adopted.

Hereinafter, the configuration of the cartridge lid locking mechanism according to the present invention will be described. 2 and 3 are left side views showing the internal structure of the camera shown in FIG. 1, FIGS. 4 and 5 are partial plan views showing the internal structure of the camera shown in FIG. 1, and FIG. It is a front view which shows the internal structure of knob 14 vicinity.

The cartridge lid lock mechanism of this camera includes a lock lever 22 for preventing the cartridge lid 13 from being opened, and a clutch mechanism 23 for transmitting the operation of the cartridge lid opening knob 14 to the lock lever 22. .

The lock lever 22 is configured to be rotatable about a shaft 31, and engages with a locking claw 21 formed on the cartridge lid 13 to prevent the cartridge lid 13 from being opened. Is disengaged from the locking claw 21 formed on the cartridge lid 13 to release the cartridge lid 13.
Move between the open position and the open position.

At the lower end of the lock lever 22, a locking portion 32 for engaging with the locking claw 21 formed on the cartridge lid 13 is formed. A locking portion 34 is formed on the lower left side of the lock lever 22 so as to engage with a stopper 33 formed on the camera body to stop the lock lever 22 at the open position after the cartridge lid 13 is released. Have been.

The lock lever 22 is urged clockwise in FIGS. 2 and 3 by the action of a spring 35. The lock lever 22 is formed around a shaft 31 with a gear 36 that can mesh with a planetary gear 45 of the clutch mechanism 23 described later. The gear 36 forms a part of a clutch mechanism 23 described later.

The clutch mechanism 23 connects the cartridge cover opening knob 14 and the lock lever 22 when the film is not pulled out of the film cartridge stored in the film cartridge chamber 12 and is stored in the film cartridge chamber 12. When the film is pulled out from the film cartridge, the connection between the cartridge cover opening knob 14 and the lock lever 22 is released.

The clutch mechanism 23 includes a sun gear 42 connected to the cartridge cover 19 via a pair of connecting shafts 41, and a planet carrier 44 rotatable about the same shaft 43 as the sun gear 42. And planet carrier 4
And a planetary gear 45 meshed with the sun gear 42 while being supported by the sun gear 42. The sun gear 42 is in contact with the planet carrier 44 with a constant frictional force by the action of the spring 39 (see FIG. 6).

When the film is not pulled out from the film cartridge housed in the film cartridge chamber 12, the clutch mechanism 23 is rotated by the cartridge cover opening knob 14 connected to the sun gear 42 to rotate the planetary gear. The gear 45 is the gear portion 36 of the lock lever 22
The planetary carrier 44 can be rotated to a position where it meshes with
When the film is being pulled out from the film cartridge stored in the film cartridge chamber 12,
A regulating mechanism 51 for regulating the rotation of the planet carrier 44 is provided.

The restricting mechanism 51 includes a driven gear 52 that rotates around a shaft 61 and a restricting member 53 disposed coaxially with the driven gear 52.

As shown in FIGS. 4 and 5, the driven gear 52 is disposed coaxially with the rewinding fork 54, and is driven by a driving gear 55 which rotates when the film is wound or unwound.
, And rotates in synchronization with the drive gear 55.

On the other hand, the regulating member 53 is in contact with the driven gear 52 with a constant frictional force by the action of the spring 56. The regulating member 53 moves between the position shown in FIG. 4 and the position shown in FIG.
It rotates around the shaft 61.

Here, the position shown in FIG.
Is a position where the contact portion 57 formed at the base end of the regulating member 53 contacts the stopper 59. In this position, the tip of the regulating member 53 is
4, and the rotation of the planet carrier 44 is restricted. The position shown in FIG. 5 is a position at which the contact portion 57 formed at the base end of the regulating member 53 contacts the stopper 58 by driving the driven gear 52. In this position, the distal end of the regulating member 53 and the upper end 49 of the planet carrier 44 are spaced apart from each other,
The rotation of the planet carrier 44 is allowed.

Next, the locking operation of the cartridge lid 13 by the above-described cartridge lid locking mechanism will be described.

In a state where no film cartridge is stored in the film cartridge chamber 12, FIG.
As shown in FIG. 7, the locking portion 32 of the lock lever 22 and the locking claw 21 of the cartridge lid 13 are engaged, and the cartridge lid 13 is fixed at the closed position. At this time, FIG.
As shown in FIG.
4 and are spaced apart from each other.

In this state, in order to open the cartridge lid 13, the cartridge lid opening knob 14 is rotated counterclockwise. As a result, the sun gear 42 connected to the cartridge lid opening knob 14 rotates counterclockwise in FIG. With the rotation of the sun gear 42, the action of the spring 39 causes the sun gear 4 to rotate.
The planet carrier 44 abutting on the shaft 2 with a frictional force rotates counterclockwise about the shaft 43 together with the sun gear 42.

Then, as shown in FIG. 3, the planet carrier 44 stops at a position where the contact portion 46 formed at the end thereof comes into contact with the stopper 47 formed on the camera body. In this position, the planetary gear 45 meshes with the gear portion 36 formed on the lock lever 22.

In this state, when the sun gear 42 further rotates together with the cartridge lid opening knob 14,
Since the planet carrier 44 is stopped, the sun gear 4
The planetary gear 45 meshing with 2 rotates in synchronization with the sun gear 42. Then, as the planetary gear 45 rotates, the gear portion 36 of the lock lever 22 that meshes with the planetary gear 45 rotates. As a result, the lock lever 22 itself rotates about the shaft 31 against the urging force of the spring 35.

As the lock lever 22 rotates, FIG.
As shown in FIG. 3, a locking portion 32 formed on the lower end of the lock lever 22 and a locking claw 2 formed on the cartridge lid 13.
1 is released. As a result, the cartridge lid 13 is opened as shown by a virtual line in FIG. 1 and by a solid line in FIG. It is preferable to provide a spring or the like for urging the cartridge lid 13 in the opening direction.

In this state, the locking portion 34 formed on the lower left side of the lock lever 22 is engaged with the stopper 33 formed on the camera body. For this reason, FIG.
As shown in (5), the state in which the engagement between the locking portion 32 and the locking claw 21 of the lock lever 22 is released is maintained.

Next, when the film cartridge is stored in the film cartridge chamber 12 with the cartridge cover 13 opened, and the cartridge cover 13 is moved to the closed position again, first, The locking portion 34 formed on the left side is pressed by the pressing portion 24 formed on the side of the locking claw 21, and the engagement between the locking portion 34 and the stopper 33 is indicated by a virtual line in FIG. 3. The relationship is broken. Then, the lock lever 22 rotates clockwise as shown in FIG.

As a result, the lock lever 22 and the clutch mechanism 23 return to the state shown in FIG. Therefore, the locking portion 32 of the lock lever 22 and the cartridge lid 1
3 engages with the locking claws 21 and the cartridge lid 13 is fixed at the closed position.

When a sensor (not shown) confirms that the cartridge lid 13 is closed, the film is pulled out of the film cartridge in the film cartridge chamber 12 and is conveyed toward a spool shaft (not shown). The spool shaft and the rewind fork 5 are driven by a motor (not shown).
4 rotates, and an initial loading operation of winding the vicinity of the leading end of the film around the spool shaft is performed. During this initial loading, the drive gear 55 rotates clockwise as shown in FIGS. 4 and 5 by driving a motor (not shown).

Before the initial loading operation is performed, as described above, the tip of the regulating member 53 and the upper end 49 of the planet carrier 44 are spaced apart from each other as shown in FIG. When the drive gear 55 rotates clockwise in this state, the driven gear 52 meshing with the drive gear 55 rotates counterclockwise about the shaft 61. Then, by the rotation of the driven gear 52, the regulating member 53 that comes into contact with the driven gear 52 with a constant frictional force rotates counterclockwise about the shaft 61.

Then, as shown in FIG.
Stops at a position where the contact portion 57 formed at the base end of the regulating member 53 contacts the stopper 59. In this state, the tip of the regulating member 53 is engaged with the upper end 49 of the planet carrier 44, and the rotation of the planet carrier 44 is regulated.

It should be noted that even after the contact portion 57 formed at the base end of the regulating member 53 contacts the stopper 59, the driving gear 5
5 continues rotation. However, since the regulating member 53 and the driven gear 52 are in contact only with a certain frictional force, the driven gear 52 continues to rotate together with the drive gear 55 even after the regulating member 53 stops.

As described above, the film cartridge chamber 12
In a state where the film is pulled out from the film cartridge stored in the cartridge carrier and the tip of the regulating member 53 is engaged with the upper end 49 of the planetary carrier 44 and the rotation of the planetary carrier 44 is regulated, the operator operates the cartridge lid. When the release knob 14 is rotated, the sun gear 42 rotates together with the cartridge lid release knob 14, but the planetary carrier 44 does not rotate from the position shown in FIG. Is not transmitted to the gear portion 36 of the second motor. Therefore, even when the cartridge lid opening knob 14 rotates, the state where the cartridge lid 13 is fixed at the closed position is maintained.

When the photographing of all the frames on the film is completed, the spool shaft and the rewinding fork 54 rotate in the opposite direction to the initial loading by the driving of a motor (not shown), and the film is rewound. At this time,
The drive gear 55 rotates in the counterclockwise direction shown in FIGS.

When the drive gear 55 rotates counterclockwise,
The driven gear 52 meshing with the driving gear 55 rotates clockwise about the shaft 61. Due to the rotation of the driven gear 52, the regulating member 53 that comes into contact with the driven gear 52 with a constant frictional force rotates clockwise about the shaft 61.

Then, as shown in FIG.
Stops at a position where the contact portion 57 formed at the base end of the regulating member 53 contacts the stopper 58. In this state, the distal end of the regulating member 53 and the upper end 49 of the planet carrier 44 are arranged apart from each other, and the rotation of the planet carrier 44 is allowed.

As in the case of the initial loading described above, the drive gear 55 continues to rotate even after the contact portion 57 formed at the base end of the regulating member 53 contacts the stopper 58. However, since the regulating member 53 and the driven gear 52 are in contact only with a certain frictional force,
The driven gear 52 continues to rotate with the drive gear 55 even after the regulation member 53 stops.

When the operator rotates the cartridge lid opening knob 14 after the film is completely rewound, the rotation of the planet carrier 44 causes
The planet gear 45 and the gear portion 36 of the lock lever 22 mesh with each other, and the lock lever 22 itself rotates about the shaft 31. Therefore, the locking portion 32 formed on the lower end of the lock lever 22 and the locking claw 2 formed on the cartridge lid 13
1 is released, and the cartridge lid 13 is opened.

[0050]

According to the first to fourth aspects of the present invention, when the film is not pulled out of the film cartridge housed in the film cartridge chamber, the cartridge cover opening knob and the lock member are connected, and When the film is pulled out from the film cartridge housed in the cartridge chamber, it has a clutch mechanism that releases the connection between the cartridge lid opening knob and the lock member.
It is possible to prevent the cartridge cover from being opened when the film is pulled out from the film cartridge stored in the film cartridge chamber.

At this time, even when the cartridge lid opening knob is operated in a state where the film is pulled out from the film cartridge housed in the film cartridge chamber, the cartridge lid opening knob only idles and the cartridge lid locking mechanism is activated. No damage to internal mechanism including

[Brief description of the drawings]

FIG. 1 is a front view of a camera to which the present invention is applied.

FIG. 2 is a left side view showing the internal structure of the camera.

FIG. 3 is a left side view showing the internal structure of the camera.

FIG. 4 is a partial plan view showing the internal structure of the camera.

FIG. 5 is a partial plan view showing the internal structure of the camera.

FIG. 6 is a front view showing the internal structure near the cartridge cover opening knob 14;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Housing 12 Film cartridge chamber 13 Cartridge lid 14 Cartridge opening knob 21 Locking claw 22 Lock lever 23 Clutch mechanism 32 Locking part 33 Stopper 35 Spring 36 Gear part 39 Spring 42 Sun gear 44 Planet carrier 45 Planetary gear 51 Regulation mechanism 52 Driven gear 53 regulating member 54 rewinding fork 55 drive gear 56 spring

Claims (4)

[Claims] 1. A camera provided with a film cartridge chamber for accommodating a film cartridge and a cartridge lid for opening and closing a passage of the film cartridge in the film cartridge chamber. A lock member movable between an open prohibition position to prohibit, an open allowance position for disengaging the cartridge lid and allowing the cartridge lid to be opened, and the lock member being opened when the cartridge lid is opened. A cartridge lid opening knob for moving from the opening prohibition position to the opening allowable position, and connecting the cartridge lid opening knob and the lock member when the film is not pulled out from the film cartridge stored in the film cartridge chamber. And housed in the film cartridge chamber. A cartridge lid locking mechanism for a camera, comprising: a clutch mechanism for releasing the connection between the cartridge lid opening knob and the lock member when a film is being pulled out from the loaded film cartridge. 2. The cartridge lid locking mechanism for a camera according to claim 1, wherein the locking member is formed by a locking lever having at one end a locking portion engageable with a locking claw formed on the cartridge lid. Lock mechanism for the cartridge lid of the camera. 3. The cartridge lid locking mechanism according to claim 2, wherein the clutch mechanism is rotatable about a sun gear connected to the cartridge lid opening knob and about the same axis as the sun gear. A planetary gear supported by the planetary carrier meshing with the sun gear; a gear portion meshable with the planetary gear formed on the lock lever; and a film cartridge housed in the film cartridge chamber. When the film is not pulled out from, with the rotation of the cartridge lid open knob connected to the sun gear, the planetary gear is rotatable to a position where the planetary gear meshes with the gear portion of the lock lever,
When a film is being drawn from a film cartridge stored in the film cartridge chamber,
And a regulating mechanism for regulating the rotation of the planet carrier. 4. The cartridge lid locking mechanism for a camera according to claim 3, wherein the regulating mechanism is a driven gear that rotates in synchronization with a driving gear that rotates when the film is wound up or rewinded, and is coaxial with the driven gear. The planetary carrier is rotatable between a position that restricts the rotation of the planetary carrier and a position that permits the rotation of the planetary carrier. A cartridge lid locking mechanism for a camera, comprising: a regulating member.