JPS63280229A - Water-proof camera and mounting mechanism for its interchangeable lens - Google Patents

Abstract

PURPOSE:To improve the mounting operation of a lens on a camera by integrating a mechanical part of the camera with the inner cylinder part of the lens at the time of mounting the lens on the camera and integrating also the outer box of the camera with the outer cylinder part of the lens. CONSTITUTION:An outer cylinder mounting part 70 having plural outer bayonet claw parts 7b, 7c engaged with outer bayonet claw parts 2c, 2d is formed on the rear part of a lens outer cylinder part 7. A photographing lens 12, a diaphragm control mechanism, a distance control mechanism, etc., are arranged in the inner cylinder part 11 and supported on an inner cylinder mounting part 13. Plural inner cylinder bayonet claws 13a, 13b are formed in the mounting part 13 and a spring 14 is held between the end face 7f of the outer cylinder part 7 and the end face 13c of the mounting part 13 so as to energize the outer cylinder part 7 and the mounting part in a direction for mutually separating these parts 7, 13 in the optical axis direction. Since the engagement of an outer mount 70 with an outer mounting part 2a and that between the mounting part 13 with an inner mount 5 are simultaneously executed by the same operation, the mounting/dismounting operation of the lens can be simply executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a waterproof camera and a mounting mechanism for its interchangeable lenses.

[Conventional technology]

Conventionally, this type of lens mount mechanism was developed using the
The one disclosed in Japanese Patent No. 9-5519 is known and has a structure as shown in FIG. In Fig. 7, the main body mechanism section (71)
is housed and supported in the outer box (72) so that even if the outer box (72) deforms due to pressure, the deformation does not affect the outer box (72).
72) and the back cover (73), which is pivotally supported, are sealed waterproof by an 0 ring (74).
1) has a mount portion (75) fixed to it. Further, an opening (72a) is provided on the front surface of the outer box (72).

On the other hand, the lens mechanism section is composed of an outer cylinder part (76) and an inner cylinder part (77), and the inner cylinder part (77) is connected to a photographic lens (78).
It also includes a distance adjustment mechanism, an aperture adjustment mechanism, etc. (not shown). The outer cylinder part (76) consists of a pressure-resistant and waterproof mechanism,
The front opening has a waterproof glass (79) with an O ring (710).
) and sealed waterproof. Furthermore, in the circumferential groove (76a) provided around the rear opening, an O ring (
711) is fitted. As a result, when the lens is attached to the camera, a waterproof seal is created between the lens outer cylinder part (76) and the outer case (72). A lens mount portion (712) is fixed to the inner cylinder portion (77). The lens mount part (712) connects the outer cylinder part (76) to a plurality of axes (713).
It is pivotally supported so that it can move in the optical axis direction. Each axis (71
The spring (71-1 unit) fitted around 3) serves to pull the outer cylinder part (76) toward the mount part (7) 2).

When the lens is attached, the lens mount part (712) is attached to the plurality of bayonet claws (75a) of the main body mount part (75).
The bayonet part (712a) of the two meshes with each other, and the lens inner cylinder part (77) is fastened to the main body mechanism part by the biasing force of the spring (71 joint). (77) is not affected by deformation of the outer box part (72) and the lens outer cylinder part (76) by water pressure, and can maintain its function.

[Problem that the invention seeks to solve]

However, the above configuration causes the following problems.

(11 The fitting part between the lens outer cylinder part (76) and the outer case opening (72a) is simply a waterproof seal structure with an O ring (711), so the optical axis If a force in a right angle direction is applied to the spring (714) and the force is greater than the force of the spring (714), the outer cylinder part (76) will tilt with respect to the outer box (72).

Furthermore, when the pressure inside the camera is higher than the external pressure and its magnitude exceeds the force of the spring (714), the lens outer cylinder section (76) floats up from the outer box section (72). The waterproof sealing effect of the ring (711) will be incomplete, and there is a risk of water leakage.

(2) The attachment of the lens mount part (712,) to the main body mount part (75) is maintained by the urging force of a plurality of springs (714), and if the outer cylinder part (76) is tilted, the springs (714, ) may become uneven depending on the location, and the lens mount portion (712) may become unstable. To achieve this, it is best to increase the force of the spring (714) so that the outer cylinder part (76) is less likely to tilt. However, if the spring force is increased unnecessarily, the main body mount (75) will deform and the focusing accuracy will be adversely affected. There is no other way.

(3) When attaching the lens to the camera, use the O ring (7
11), the lens mount part (712
) is attached correctly to the main body mount (75) at the specified position.Also, as cameras become increasingly electronic, it is difficult to know whether the lens is properly attached to the main body mount (75). Therefore, if the lens is not properly attached to the camera in a predetermined position, there is a risk of malfunction. Furthermore, if the camera is used with the lens attached incompletely, there is a risk that the lens may fall off from the camera, resulting in a flood accident.

[Means for solving problems]

The structure of the present invention that solves the above problems is shown in FIGS. 1 to 6.
The embodiments shown in the figures will be described below with reference to the reference numerals. That is, in the mount mechanism of the present invention, the outer cylinder mount (70) is attached to the outer cylinder part (7) of the lens, and the outer cylinder mount (70) is attached to the inner cylinder part (1) of the lens.
1) is provided with an inner cylinder mount (13), an outer mount (2a) that can be engaged with the outer cylinder mount (70) is provided on the outer case (2) of the camera, and an inner cylinder mount (13) is provided on the main body mechanism (1). 1
3), which can be engaged with the outer cylinder mount (70) and the outer mount part (2a), and between the inner cylinder mount (13) and the inner mount (5). This feature is characterized in that the combinations are performed simultaneously by the same operation.

[For production]

With this configuration, when the lens is attached to the camera, the mechanism part (1) of the camera and the inner cylinder part (11) of the lens are integrated as in the conventional case, and the outer case (2) of the camera and the lens are integrated. Since the outer cylinder part (7) of will also be integrated,
The external force applied to the outer cylinder part (7) does not adversely affect the state of connection between the camera and the lens.Moreover, the operation of attaching the camera and lens can be done in the same way as before, and there is no problem with operability.

〔Example〕

FIG. 1 shows an embodiment of the present invention, and is a sectional view taken along a plane including the optical axis of the lens, showing a state in which a waterproof lens unit is waterproofly attached to a waterproof camera unit by a bayonet. It is an enlarged sectional view.

In Fig. 1, the main body mechanism section (1) of the waterproof camera is composed of an outer box section (2), a back cover section (3), and an O-ring (4) that provides a waterproof seal between the two. The 0 body mechanism part (1) is housed and supported inside a waterproof and pressure-resistant structure, and is supported so that it will not be affected even if the outer case (2) or the back cover (3) deform due to external pressure. It includes a holding mechanism that holds the film at a predetermined position behind the lens, a film lifting mechanism, a shunter mechanism, etc.

An inner mount part (5) for mounting a photographic lens is fixed to the front surface of the main body mechanism part (1). In Fig. 2, the inner mount part (5) has a plurality of inner bayonet claw parts (5a), (
5b), and a plurality of bayonet springs (6) for press-fitting and engaging the lens-side inner cylinder mount (described later) to the main body mount (5).

On the front of the outer box, there is an outer mount section (2a) for attaching a waterproof lens.
), and a waterproof seal part (2b) formed by an O-ring and a plurality of outer bayonet claw parts (2c) and (2d) are provided.

Next, the configuration of the waterproof lens section will be explained. In Fig. 1, a waterproof glass (8) is arranged in the front opening of the lens outer cylinder part (7), and an O-ring (9) is attached to the outer cylinder part (7).
) and the waterproof glass (8). The rear part of the outer cylinder part (7) has a circumferential groove part (7a) in which the O-ring (10) is attached, and a plurality of outer cylinder bayonet claw parts (7b) that fit into the outer bayonet claw parts (2C) and (2d). ), (7C).

The inner cylinder part (11) is equipped with a photographic lens (12), an aperture control mechanism, a distance control mechanism, etc., and the inner cylinder mount part (13
) is supported. The inner cylinder mount portion (13) is provided with a plurality of inner cylinder bayonet claws (13a) and (13b). A spring (14) is held between the outer cylinder end face (7f) of the outer cylinder part (-7) and the mount end face (13e) of the inner bay mount part (13), and the outer cylinder part (7) and the inner The tube mount portion (13) is biased in a direction away from each other in the optical axis direction.

The outer cylinder mount (70) is provided with a recess (7a), and the inner cylinder mount (13) is provided with a convex part (13d), which fit together to form the inner mount (13) and outer cylinder part (7). The relative rotation of the inner cylinder part (11) with respect to the outer cylinder part (7) is restricted.
is supported so as to be movable by a certain amount in the optical axis direction. This amount of movement is set to the amount necessary for engagement of the bayonet claw.

FIG. 3 is a plan view of the relative positions of the respective bayonet claws of the engaging part, and in this embodiment, the number of bayonet claws is two.
There are several places.

As shown in FIGS. 5 and 6, the lock pin (15) is provided on the inner cylinder mount (5) and is movable in the optical axis direction, and the recess (13r) is located on the inner cylinder mount (13). ) is provided on the end surface (13e) corresponding to the lock pin (15). When the waterproof lens is fully installed as shown in Figure 6, one end (15m) of the lock pin (15) is in the recess (12f).
) to lock the rotation of the waterproof lens.

In FIGS. 5 and 6, the lock pin (15) passes through a hole in the optical axis direction formed in the inner cylinder mount (5) and the support member (18), and is held at one end (15a) by a spring (16). )
Direction to protrude from the inner mount (5) (left direction in the figure)
is energized by The support member (18) has a lock pin (15
) and is in contact with a cam surface (20a) fixed to one end of the shaft (20).The shaft (20) is attached to the outer box part (
2), and an O-ring (21) is attached to the circumferential groove in the middle of the shaft (20), connecting the shaft (20) and the outer box part (
2) There is a waterproof seal between the

A lens attachment/detachment lever (22) is fixed to the other end of the shaft (20), which is disposed outside near the outer cylinder mount (70). A switch member (19) is disposed on the support member (17) on the other end (15b) side of the lock pin (15) and is connected to the control circuit of the main body (1).

The operation of attaching the waterproof lens to the waterproof camera with the above configuration will be explained.

Figure 5 shows the state immediately after the waterproof lens mount part is inserted into the waterproof camera mount part. At this time, the relative relationship of each bayonet claw part is in the position as shown in Figure 3, and the lock pin (15) and the recess ( 13f) is in the disengaged position. In this state, as shown in FIG.
), the outer cylinder mount part (70) of the outer cylinder part (7) is inserted into the outer mount part (2a) of the outer box (2), and the 0 The ring (10) deforms elastically between the two.

The end surface (13e) of the inner cylinder mount is pressed against the main body mount surface (5C) by the biasing force of the spring (14) and pushes the lock pin (15) to the right in the figure, so the switch (19)
becomes ON. In the state shown in Fig. 5, the outer bayonet claws (2C), (2d) and the outer bayonet claw (7b
) and (7C) interfere with each other in the rotational direction, so it is not possible to turn the waterproof lens to the position shown in Figure 4, but the outer cylinder part (7C)
) is further pushed toward the right in the figure against the spring (14), the interference is completely eliminated at the position where the end surfaces (7e) and (2e) abut, and the waterproof lens becomes rotatable.

In this example, the rotation angle required to attach the waterproof lens is 9.
0°, and when the waterproof lens is rotated 90° from the state shown in FIG. 3, it becomes the fully installed state shown in FIG. 4. Each bayonet claw part is (13a), (5a), (13b) and (5
b), (7b) and (2C), (7G) and (2d) are engaged with each other, and as shown in FIG.
One end (15a) of the lock pin (15) provided on the inner mount (5) is located in the recess (13f) of the end surface (13e) of 3).
) is depressed by the biasing force of the spring (16) and locks the rotation of the lens. At the same time, the bayonet spring (-6)
As shown in the figure, press the inner bayonet claws (13a) and (13b) to the right in the figure, and
Since the end face (13e) of the inner cylinder mount part (13) is brought into close contact with c), the inner cylinder part (11) and the main body mechanism part (1) are integrated in both the rotational and optical axis directions. Also, the outer cylindrical bayonet (7b), (7C) and the outer bayonet (2c), (2d)
are engaged with each other, and the outer cylindrical portion (7) is engaged and held with the outer case (2).

Note that when the lens is not attached to the camera, the lock pin (15) protrudes to the position indicated by the broken line in Fig. 6 due to the biasing force of the spring (16), so the switch member (19) is turned OFF.
However, when the lens is inserted into the outer mount part (2a) as shown in Figure 5, the switch member (19)
is in the first ON state, and when it is completely attached as shown in FIG. 6, it is in the second ON state, and each transmits separate signals to the main body camera mechanism section (1).

To remove the lens, rotate the attachment/detachment lever (22),
The cam surface (20b) of the shaft (20) pushes the lever (18) to the right in FIG.
) and the concave portion (13f) of the inner tube mount (13), and then rotate the lens in the opposite direction to that when it is attached.

〔Effect of the invention〕

As described above, according to the waterproof camera and lens mounting device of the present invention, (1) Since the inner cylinder mount (13) is tightly pressed against the inner mount (5) by the spring (6), the inner cylinder part (11 )
Sufficient spring force can be applied to the spring (6) to hold it, and the spring force of the spring (6) becomes an internal force of the inner mount (5) and the inner cylinder mount (13), so that The inner cylinder part (11) can be reliably fastened to the camera side mount without affecting the focusing accuracy due to an increase in spring force.

(2) An outer cylinder mount (70) is provided on the outer cylinder part (7), and when the lens is attached, the outer cylinder mount (70)
By engaging with the outer mounting part (2a) of the outer case (2), the outer cylinder part (7) and the outer case (2) are integrated, so that the external force is applied to the outer cylinder part (7). Even if the external cylinder part (7) is exposed to water or the internal pressure increases, the outer cylinder part (7) will not tilt or float, and a waterproof seal can be ensured.

(3) The outer cylinder mount (70) and the outer mount part (2)
a) and the engagement with the inner cylinder mount (13) and the inner mount (
Since the engagement with 5) is performed at the same time by the same operation, the operation of attaching and detaching the lens is simple.

Further, according to the embodiment of the present invention described above, (4) the spring member (14) elastically supports the inner cylinder part (11) and the outer cylinder part (7) in the optical axis direction, so that the lens When installation is complete, the inner cylinder mount surface (13e) is aligned with the inner mount (5) surface (
5c). Therefore, the lens can be accurately mounted on the camera without being affected by dimensional variations in each part due to processing and assembly.

(5) By placing the outer cylinder mount (70) inside the O-ring (lO), dust and sand may adhere to the mount surface during use, resulting in roughness or sand getting caught when the lens is attached or detached. does not occur.

(6) Between the inner cylinder mount (13) of the inner cylinder part (11) including the lens mechanism part and the inner mount (5), there is a lock bin mechanism (for regulating the position in the rotational direction when the lens is attached to the camera). 13r, 15), the transmission of signals between the lens and the camera is ensured, and there is no need to make the relative mounting positional relationship between the outer cylinder part (7) and the inner cylinder part (11) too strict. Processing and assembly become easier.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of one embodiment of the present invention, Fig. 2 is a large-scale sectional view of the portion shown in Fig. 1, Figs. 3 and 4 are plan views showing the mount portion of the same embodiment, and Fig. 5 and 6 are partially enlarged cross-sectional views taken in different cross-sections from those shown in FIG. 2, and FIG. 7 is a cross-sectional view of the prior art. [Explanation of symbols of main parts] 13...Inner cylinder mount 70...Outer cylinder mount 5...Inner mount 2a...Outer mount

Claims (2)

[Claims] (1) In a mount mechanism for a waterproof camera to which an interchangeable lens is attached, which has an inner barrel including an optical system and an outer barrel with a waterproof structure that internally holds the inner barrel, the end of the outer barrel an outer mount part that engages with an outer cylinder mount part provided at the end of the inner cylinder mount part, and an inner mount part that engages with an inner cylinder mount part provided at an end of the inner cylinder part, A mount mechanism for a waterproof camera, characterized in that the engagement between the outer mount section and the inner mount section and the engagement between the inner cylinder mount section and the inner mount section are performed simultaneously by the same operation. (2) In a mount mechanism for a waterproof camera interchangeable lens, which has an inner barrel including an optical system and an outer barrel with a waterproof structure that internally holds the inner barrel, the mount mechanism is provided at an end of the outer barrel. an outer cylinder mount part provided at an end of the inner cylinder part, and the outer cylinder mount part and the inner cylinder mount part each have two corresponding mounts of the camera. A mount mechanism for an interchangeable lens for a waterproof camera, characterized in that the mount mechanism can be simultaneously engaged with both parts by the same operation.