JPH11218818A - Back cover structure for water proof and drip proof camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a back cover structure for a water proof and drip proof camera whose back cover is easily molded. SOLUTION: In the back cover structure for a water proof and drip proof camera, a water proof member housing groove is annularly provided on the opposed surface of the back cover 12 which can be opened/closed with respect to a camera body 11 to the camera body 11, and the water proof member inserted in the annular housing groove is brought into contact with the camera body 11 when the back cover 12 is closed, so that the inside of the camera body 11 is covered in a watertight state. A part of the annular housing groove provided on the back cover 12 is formed of an auxiliary member 30 separate from the back cover 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a back cover structure of a waterproof drip-proof camera.

[0002]

2. Description of the Related Art In a waterproof and drip-proof camera, a waterproof packing is provided between a back cover and a camera body. In general, the waterproof packing is in close contact with the camera body when the back cover is closed. So that it is supported by an annular groove formed in the back cover. However, when the back cover has a non-planar shape having a protruding portion such as a grip portion (finger portion), when the protruding portion and the annular groove for supporting the waterproof packing are located on the front and back of the back cover. In order to keep the surface position of the annular groove constant, the projecting portion of the back cover must be formed with uneven thickness. Such an uneven thickness shape is difficult to mold,
In addition, sink marks are likely to occur on the appearance.

In order to open and close the back cover, the back cover and the camera body are connected by a hinge pin so as to be relatively rotatable.
Generally, the hinge pin is pressed into the back cover or pressed by a member different from the back cover to prevent the hinge pin from coming off from the back cover, but its detachability is poor. There is also a type in which the hinge pin is a spring pin, or the hinge pin is adhesively fixed to the rotation support portion of the back cover, while the hinge pin support portion on the camera body side is detachable to prevent the camera body from falling off. .

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a back cover structure of a waterproof drip-proof camera in which the back cover can be easily formed. Another object of the present invention is to provide a back cover structure of a waterproof drip-proof camera with a simple configuration in which a hinge pin for opening and closing support can be easily attached and detached.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a back cover which can be opened and closed with respect to a camera body. In the back cover structure of the waterproof drip-proof camera in which the waterproof member inserted into the groove is in close contact with the camera body and closes the camera body in a watertight manner, a part of the annular storage groove provided on the back cover is separate from the back cover. Characterized in that it is formed by the auxiliary member described above.

[0006] It is preferable that the back cover has a hollow grip portion projecting rearward, and the auxiliary member is fixed to an inner surface side of the grip portion.

The above-described back cover structure includes a pair of hinge pins which are inserted across a hole provided in the back cover and a hole provided in the camera body, and which support the back cover so that the back cover can be opened and closed in the inserted state. The member desirably has a pair of retaining portions for holding the pair of hinge pins in the inserted state.

It is preferable that the pair of retaining portions provided on the auxiliary member is elastically deformable in a direction orthogonal to a direction in which the pair of hinge pins are inserted into the hole of the back cover and the camera body. The elastic deformation direction of the pair of retaining portions may be a direction parallel to the insertion direction of the pair of hinge pins.

The auxiliary member is made of a material different from that of the back cover,
It is preferable that it also serves as a strength member of the back cover.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a waterproof drip-proof camera 10, a back cover 12 for covering substantially the entire back surface of a camera body 11 is supported by a hinge portion 14 so as to be openable and closable. In the following description, the side shown in FIG. 1 will be referred to as the outer surface of the back cover 12, and the side facing the camera body 11 shown in FIG. The back cover 12 is formed with a grip portion (finger portion) 13 protruding rearward in the vicinity of the hinge portion 14. In the back cover 12, the grip 13
Is hollow on the inner surface side. The back cover 12 is locked by a lock mechanism (not shown) in a closed state, and can be unlocked and opened by operating a lock release lever 15 provided on the camera body 11.

An opening 12a is formed in the back cover 12 at a position facing a patrone chamber (not shown) inside the camera body 11, and a film checking window 16 is fitted in the opening 12a. A patrone holder 18 having an opening 18a corresponding to the opening 12a is provided adjacent to the film checking window 16 on the inner surface side of the back cover 12. Therefore, back cover 12
Is closed, the presence or absence and the type of the film cartridge in the cartridge room can be visually recognized through the film confirmation window 16. Reference numeral 17 in the figure is the back cover 1
2 is a stopper for determining the maximum opening position of the back cover 12 by first contacting the camera body 11 when the camera 2 is opened.

When the back cover 12 is closed, the camera body 1 is closed.
An annular waterproof packing 21 is disposed on the inner surface side of the inner space so that the space between them is closed in a watertight manner. An annular packing storage groove 22 is formed on the inner surface of the back cover 12.
The waterproof packing 21 is inserted into the inside 2. Note that FIG. 3 shows only a part of the waterproof packing 21 and the packing storage groove 22.

Although not shown, a portion of the camera body 11 to which the waterproof packing 21 is in close contact is located in substantially the same plane. Therefore, the contact surface (adhesion surface) of the waterproof packing 21 with the camera body 11 needs to be flush with the entire back cover 12 irrespective of the outer surface shape. Since the back cover 12 has a substantially flat plate shape except for the grip portion 13, it is easy to form the packing storage groove 22 in a portion other than the grip portion 13. On the other hand, on the inner surface side of the grip portion 13, since the surface position of the waterproof packing 21 is far from the back cover 12, it is difficult to form the packing storage groove 22. The present invention is characterized in that a part of the packing storage groove 22 located on the inner surface side of the grip portion 13 is formed by an auxiliary member 30 which is a member separate from the back cover 12.

The auxiliary member 30 will be described with reference to FIGS. The auxiliary member 30 is a separate member from the back cover 12, and is a mounting support portion 31 extending in the thickness direction of the back cover 12.
And a rib forming portion 32 extending in the front-rear direction of the camera substantially orthogonally to the mounting support portion 31 (FIG. 4).

The inner surface side of the back cover 12 (grip portion 13)
A flat support surface 24 corresponding to the mounting support portion 31 of the auxiliary member 30 and a rib forming convex portion 25 extending in the thickness direction of the back cover 12 in parallel with the rib forming portion 32 of the auxiliary member 30 are formed. A recess 26 having a predetermined depth is formed rearward between the support surface 24 and the rib forming projection 25.

The mounting position of the auxiliary member 30 with respect to the back cover 12 is determined by bringing the mounting support portion 31 into contact with the support surface 24 and fitting one side of the rib forming portion 32 into the concave portion 26. When the auxiliary member 30 is attached to the attachment position, the adjacent surface 32 a of the rib forming portion 32 of the auxiliary member 30
The second rib-forming projection 25 is in close contact with the adjacent surface 25a.

The support surface 24 of the back cover 12 is provided with three screw holes 24a, and the mounting support portion 31 of the auxiliary member 30 is provided with three corresponding through holes 31a. The auxiliary member 30 has three screw holes 24a and three through holes 3 respectively.
By fixing the three fixing screws 36 in correspondence with the position 1, it is fixed to the inner surface of the back cover 12 at the above-mentioned mounting position. In FIG. 4, only one screw hole 24a and one through hole 31a are shown.

When the auxiliary member 30 is attached to the back cover 12,
The rib forming portion 32 of the auxiliary member 30 and the rib forming convex portion 25 of the back cover 12 have a vertically long rib-like portion extending forward (toward the camera body 11) in a state where the adjacent surfaces 32a, 25a are in close contact with each other. 33 are formed. An end surface portion of the rib-shaped portion 33 facing the camera body 11 is cut away at a fixed width across the adjacent surfaces 32a, 25a of the rib-formed portion 32 and the rib-formed protrusion 25, and accommodates the waterproof packing 21. Vertical groove 22a is formed.

The amount of protrusion of the rib-like portion 33 (the rib-forming portion 32 and the rib-forming protrusion 25) in the direction of the camera body 11 is determined by the amount of the waterproof packing 21 housed in the vertical groove 22a when the back cover 12 is closed. Are set to be in close contact with the camera body 11. The waterproof packing 21 has a groove-like portion 27 that straddles the adjacent surfaces 32a, 25a of the rib forming portion 32 and the rib forming protrusion 25.

The inner surface of the back cover 12 is provided with the above-described vertical groove 2.
A packing storage groove 22 is formed in an annular shape with 2a as a part. The waterproof packing 21 has an annular packing storage groove 22.
Is fixed with an adhesive throughout. The adhesive seals the space between the waterproof packing 21 and the packing storage groove 22. The entire surface position of the waterproof packing 21 fixed to the packing storage groove 22 is substantially the same, and when the back cover is closed, the waterproof packing 21 is attached to the camera body at a position other than the position corresponding to the vertical groove 22a. Close contact with 11. Therefore, the annular waterproof packing 21 is attached to the camera body 1.
1 and the back cover 12 are closed in a watertight manner.

For comparison with the present embodiment, FIG. 5 shows a cross section in an example in which the entire supporting portion (storage groove) of the waterproof packing is integrally formed with the back cover. The back cover 112 is supported by the hinge 114 so as to be openable and closable with respect to the camera body 111. A grip 113 projecting rearward is formed near the hinge 114 on the back cover 112. Since the inner surface of the grip portion 113 is hollow, the distance between the back cover 112 and the camera body 111 in the grip portion 113 is large. Therefore, in order to support the waterproof packing 121 at a position where the waterproof packing 121 is in close contact with the camera body 111, the support rib 125 is protruded forward (in the direction of the camera body 111) from the inner surface of the back cover 112.

The support rib 125 must be wider than at least the packing housing groove 122 because the packing housing groove 122 corresponding to the width of the waterproof packing 121 is formed on the protruding end surface. Therefore, the uneven thickness portion of the back cover 112 becomes wide. As described above, a wide uneven thickness portion is not preferable in terms of molding workability and part finish.

On the other hand, according to the present embodiment, in the grip portion 13 in which the back cover 12 and the camera body 11 are spaced apart from each other, the supporting structure of the waterproof packing 21 is supported by the auxiliary member 30 which is a member separate from the back cover 12. Since the part is formed, the uneven thickness part of the back cover 12 can be narrowed.

The auxiliary member 30 is also used to prevent the hinge pin 42 for opening and closing the back cover 12 from coming off. The following describes how to prevent the hinge pin from coming off.

A grip 13 is provided on the horizontally long back cover 12.
An opening / closing support portion 40 extending laterally from a short side portion close to is formed. A pair of hinge pin insertion portions 41 having holes through which the pair of hinge pins 42 can be formed are formed at the upper and lower ends of the opening and closing support portion 40. The camera body 11 is formed with a pair of hinge pin insertion portions 43 having holes into which a certain amount of the hinge pins 42 can be inserted at intervals corresponding to the width of the opening / closing support portion 40 in the vertical direction.

The pair of hinge pins 42 are inserted into the holes of the pair of hinge pin insertion portions 41 with the respective pin heads 42a facing each other, and the movement in the insertion direction is restricted by the pin heads 42a. At the insertion restricted position by the pin head 42a, the pair of hinge pins 42
The shaft portion is vertically projected from the hinge pin insertion portion 41 and is inserted into the hole of the pair of hinge pin insertion portions 43. As described above, the pair of hinge pins 42 is
To support the back cover 12 so that it can be opened and closed. Then, the retaining of the hinge pin 42 in the direction opposite to the insertion direction is performed by the auxiliary member 3 described above.
This is performed by a pair of retaining projections 35 provided at 0.

The pair of retaining projections 35 are
From the mounting support portion 31 in the direction of the opening / closing support portion 40 of the back cover 12. When the auxiliary member 30 is fixed to the back cover 12 with the above-mentioned three fixing screws 36, a pair of retaining projections 3
Numerals 5 extend to the vicinity of the upper and lower hinge pin insertion portions 41 at intervals that can pinch the pin head 42a of the hinge pin 42. Therefore, the pair of hinge pins 42
When the shaft portion is inserted into the hinge pin insertion portion 41 such that the pin head 42a is sandwiched between each pair of the retaining protrusions 35 and the hinge pin insertion portion 41, the shaft portion is prevented from being removed in the direction opposite to the insertion direction.

The pair of retaining projections 35 can be elastically deformed in a direction perpendicular to the direction in which the hinge pin 42 is inserted into the hole of the hinge pin insertion portion 41 and the hole of the hinge pin insertion portion 43 (downward in FIG. 4 in this embodiment). It is. When attaching the back cover 12 to the camera body 11, the open / close support 40 of the back cover 12 is fitted between a pair of hinge pin insertion portions 43 provided on the camera body 11. As described above, the auxiliary member 30 is fixed to the back cover 12, and the pair of retaining projections 35 are located near the hinge pin insertion portion 41. Then, with the hinge pin insertion portion 43 and the hole portion of the hinge pin insertion portion 41 aligned with each other,
When the member 5 is elastically deformed downward in FIG. 4, this hole is exposed, and the hinge pin 42 can be inserted. Therefore, when the pair of hinge pins 42 are passed through the corresponding hinge pin insertion portions 41 and the hinge pin insertion portions 43 while maintaining the elastic deformation state of the pair of retaining projections 35, and the pair of retaining projections 35 are restored, the respective hinge pins are restored. 42 is retained. In the retaining state, the back cover 12 is
To open and close the camera body 11.

Conversely, if the pair of retaining projections 35 are elastically deformed downward in FIG. 4 to release the retaining state, the pair of hinge pins 42 can be pulled out. Therefore, the back cover 12 can be easily removed from the camera body 11.

The elastic deformation direction of the pair of retaining projections 35 may be parallel to the direction in which the hinge pins 42 are inserted. For example, the hole of the hinge pin insertion portion 41 can be exposed by elastically deforming the pair of retaining projections 35 in the vertical direction in FIG. That is, each of the retaining projections 35 only needs to have elasticity that allows the hinge pin 42 to be inserted into and removed from the hinge pin insertion portion 41 in a state where the auxiliary member 30 is fixed to the back cover 12.

As described above, since the auxiliary member 30 constituting a part of the storage groove for the waterproof packing is used for retaining the hinge pin, no extra member is required for retaining the hinge pin. Further, since the retaining projection 35 has elasticity that allows the attachment and detachment of the hinge pin even after the auxiliary member 30 is fixed, the attachment and detachment of the hinge pin is easy.

The back cover 12 is a molded plastic product,
The auxiliary member 30 is formed of a material different from that of the back cover 12. The material of the reinforcing member 30 is preferably a molding material having a higher glass reinforcing material content than the molding material of the back cover 12, a material having a higher carbon content, or a metal. High strength is required near the hinge of the back cover,
By forming the auxiliary member 30 from the above materials, the strength of the back cover 12 can be increased. However, the material of the auxiliary member 30 is not limited to this.

In the embodiment, the annular waterproof packing 2 is provided.
In 1, the contact surface with the camera body 11 is located in substantially the same plane over the entire circumference, but the surface position of the waterproof packing may be partially different in the front-back direction of the camera.

[0034]

As described above, according to the back cover structure of the waterproof drip-proof camera of the present invention, the housing for the waterproof member can be formed without making the back cover uneven, so that the back cover can be easily formed. Become. Further, a back cover structure of the waterproof drip-proof camera in which the hinge pin can be easily attached and detached can be obtained with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a view of a waterproof and drip-proof camera to which a back cover structure of the present invention is applied, viewed from the back cover side.

FIG. 2 is an enlarged view of the vicinity of a back cover opening / closing support portion of the camera of FIG. 1;

FIG. 3 is a view of the vicinity of a hinge pin of a back cover viewed from an inner surface side.

FIG. 4 is a cross-sectional view including a camera body, taken along line IV-IV in FIG. 3;

FIG. 5 is a cross-sectional view showing the vicinity of a back cover opening / closing support portion of a conventional waterproof drip-proof camera.

[Description of Signs] 10 Waterproof drip-proof camera 11 Camera body 12 Back cover 13 Grip part (finger-hold part) 14 Hinge part 21 Waterproof packing 22 Packing storage groove 22a Vertical groove 25 Rib forming convex part 30 Auxiliary member 31 Mounting support part 32 rib forming part 33 rib-shaped part 35 retaining projection 40 opening / closing support part 41 hinge pin insertion part 43 hinge pin insertion part

Claims (6)

[Claims] 1. A back cover that can be opened and closed with respect to a camera body, a storage groove for a waterproof member is provided in an annular shape on a surface facing the camera body, and is inserted into the annular storage groove when the back cover is closed. A part of the annular storage groove provided in the back cover is formed by an auxiliary member separate from the back cover in the waterproof drip-proof camera in which the waterproof member closely adheres to the camera body and closes the camera body in a watertight manner. The back cover structure of a waterproof and drip-proof camera. 2. The waterproof camera according to claim 1, wherein the back cover has a hollow grip portion protruding rearward, and the auxiliary member is fixed to an inner surface of the grip portion. Back cover structure. 3. A back cover structure according to claim 1, wherein the back cover is inserted between a hole provided in the back cover and a hole provided in the camera body, and the back cover is openably and closably supported in the inserted state. A back cover structure for a waterproof drip-proof camera, comprising a hinge pin, wherein the auxiliary member has a pair of retaining portions for holding the pair of hinge pins in the inserted state. 4. The back cover structure according to claim 3, wherein the pair of retaining portions provided on the auxiliary member are elastic in a direction orthogonal to a direction in which the pair of hinge pins are inserted into the holes of the back cover and the camera body. The back cover structure of a waterproof and drip-proof camera that can be deformed. 5. The back cover structure according to claim 3, wherein the pair of retaining portions provided on the auxiliary member are elastic in a direction parallel to a direction in which the pair of hinge pins are inserted into the holes of the back cover and the camera body. The back cover structure of a waterproof and drip-proof camera that can be deformed. 6. The back cover of a waterproof drip-proof camera according to claim 1, wherein the auxiliary member is made of a different material from the back cover and also serves as a strength member of the back cover. Construction.