JPH0980601A - Body structure of camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure necessary strength to load in the case of chipping the back face of a front plate member for miniaturization by providing a connecting metal member formed of a separate member to connect the front plate member with a body main body. SOLUTION: A camera has a camera body 9 provided with a main body 9a formed of synthetic resin material, and a front plate member 9b formed of synthetic resin material. A base part 26 is formed at a part close to an AF joint 23 of the front plate member 9b, and a base part 25 is formed at the front wall surface 34 of the main body 9a. One end part of a connecting metal member 29 for connecting the base parts 25, 26 is provided with a thread fastened part 29a thread-fastened to the base part 25, and the other end part is provided with first and second supporting faces 29e, 29f. The base part 26 in a position close to the AF joint 23 is fixed to the base part 25 at the front wall 34 through the connecting metal member 29, and a fixing screw 27 inserted in the threaded hole of the thread-fastened part 29a is screwed into the threaded hole of the base part 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera body structure including a body body made of a synthetic resin material and a front plate member.

[0002]

2. Description of the Related Art Conventionally, in a camera in which a taking lens is attachable / detachable, a mount portion for mounting the lens is provided on a front plate fixed to a camera body. The die-cast front plate secured a required strength by screwing a plurality of back surfaces to the camera body.
On the other hand, in recent years, in order to reduce the total weight of the camera, a front plate is constructed as a front plate member made of a synthetic resin material, and this front plate member is screwed to a body body made of a synthetic resin material. are doing.

In response to the recent demand for a compact camera body, if the front plate member made of synthetic resin is to be made smaller, for example, AF drive which should be arranged on the back side of the front plate member. The installation space for the unit is extremely small. Therefore, in order to secure this installation space sufficiently,
For example, if the front plate member back surface is appropriately cut, it is not possible to provide a leg or the like projecting to the body body side at this portion, and the front plate member has a portion that is not screwed to the body body side. I will end up. In this case, the front plate member is
The strength of the photographic lens against the load is weakened.

[0004]

SUMMARY OF THE INVENTION The present invention is based on the above-mentioned awareness of the body structure of the camera, and can secure the necessary strength against the load even when the back surface of the front plate member is scraped in response to the demand for compactness. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a body main body made of a synthetic resin material having a photographing opening; a synthetic resin material fixed to the body main body, which comprises a mount portion to which a photographing lens can be attached and detached. In a body structure of a camera including a front plate member made of, a connecting metal member, which is a separate member for connecting the body body and the front plate member, is provided.

The connecting metal member has a screwing portion screwed to the body body at one end thereof, and receives a tensile force and a compressive force applied to the front plate member in the optical axis direction at the other end thereof. It is desirable to have first and second support surfaces.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to illustrated embodiments. FIG. 7 shows a perspective external view of a single-lens reflex camera having a body structure according to the present invention.

The camera 11 has a camera body 9 having a body body 9a made of a synthetic resin material and a front plate member 9b made of a synthetic resin material. This front plate member 9b
Is fixed to the body 9a with a plurality of fixing screws 36. The camera body 9 has a release button 12 and an L
A CD display panel 13, a penta part 14 having a penta prism (not shown) inside, a strobe device 15 provided in the penta part 14, and an operation button 16 for popping up the strobe device 15 are provided. There is. The camera body 9 further has a mount portion 17 on the front wall for mounting the taking lens 18. The mount portion 17 is configured by fixing the annular mount member 8 to the mount fixing portion 10 of the front plate member 9b with a plurality of fixing screws 7.

FIG. 1 shows a camera body 9 in which a decorative plate, a back cover and the like are omitted and only a main part is provided. In the figure, the body main body 9a made of synthetic resin is provided with an aperture (shooting opening) 20.
The metal plate 6 formed with is integrally provided. The front plate member 9b made of synthetic resin integrally has the circular mount fixing portion 10 for fixing the annular mount member 8, and is located inside the mount fixing portion 10 and in front of the aperture 20. It has an opening 19 corresponding to the aperture 20. The body body 9a is provided on the left and right sides of the aperture 20 with a spool chamber 22 for accommodating a hoisting spool (not shown) for winding a film sent from a film cartridge (not shown), and a cartridge chamber 21 for loading the film cartridge. have.

The mount fixing portion 10 is formed with a plurality of screw holes h for fixing the annular mount member 8 and a projecting hole 10a through which the AF joint 23 is projected. As is well known, the AF joint 23 applies a driving force for focusing from the camera body 9 side to the taking lens 18 side. In the assembled state of the camera body 9, an AF drive unit 32 (see FIGS. 2 and 3) for rotating the AF joint 23 is arranged on the rear surface side of the AF joint 23 of the front plate member 9b.

The front plate member 9b is provided with fixing portions 35a, 35b having screw holes for screwing the fixing screws 36 inserted from the rear surface side of the body 9a at two upper rear positions. Further, the front plate member 9b is provided at the lower left portion with a fixing portion 35c having a screw hole into which the fixing screw 36 inserted from the back surface side of the body 9a is screwed.
Each of the fixing portions 35a, 35b, 35c is formed at the rear end of the leg-shaped portion extending rearward from the mount fixing portion 10. Since the front plate member 9b forms a space in which the AF drive unit 32 is installed, the leg portion as described above is not formed on the back surface side of the AF joint 23. Therefore, in order to sufficiently secure the strength of this portion with respect to the load, the body body 9a and the front plate member 9b are connected (coupled) by the connection metal member 29 which is a separate member.

Here, the structure of the connecting metal member 29 and its surroundings will be described. That is, the base portion 26 is formed in a portion of the front plate member 9b near the AF joint 23,
A table portion 25 is formed on the front wall surface 34 of the body 9a. Connecting metal member 29 for connecting the base portions 25 and 26
As shown in FIG. 4 to FIG.
It has a screwing portion 29a which is screwed with respect to, and has first and second supporting surfaces 29e and 29f at the other end.

The connecting metal member 29 has a first supporting surface 29e.
Between the second support surface 29f and the second support surface 29f, a connecting portion 29d having a length corresponding to the thickness of the base portion 26 is provided, and parallel portions 29c and 29b are provided between the second support surface 29f and the screw fastening portion 29a. Have The connecting portion 29d engages with the engaging groove 26a formed on the side surface of the base portion 26. The first support surface 29e is the parallel portion 29.
It is orthogonal to c, the screwing portion 29a is orthogonal to the parallel portion 29b, and the first support surface 29e is parallel to the screwing portion 29a. These screwed portions 29a, parallel portions 29b,
29c, the connecting portion 29d, the first supporting surface 29e and the second supporting surface 29f are integrally formed on a plate made of a metal material by a press or the like.

The first support surface 29e engages with the front surface 26b of the base portion 26 and receives a tensile force mainly applied to the front plate member 9b in the optical axis direction. That is, the first support surface 29e is
The front plate member 9b mainly due to the load received from the taking lens 18
This prevents the vicinity of the base portion 26 from protruding forward. Further, the second supporting surface 29f is attached to the base portion 26 by the first supporting surface 29e.
Is abutted against the rear surface 26c in the engaged state, and receives a compressive force mainly applied to the front plate member 9b in the optical axis direction. That is, the second support surface 29f prevents the vicinity of the base portion 26 from moving rearward mainly due to the load received from the taking lens 18. Therefore, the connecting metal member 29 is provided with the first supporting surface 29.
By having e and the second supporting surface 29f, it is possible to cope with the bending stress in the vertical and horizontal directions caused by the weight of the taking lens 18 and the like acting on the portion of the front plate member 9b corresponding to the AF drive unit 32. it can.

The camera 11 having the above structure can be assembled as follows. That is, the front plate member 9b is assembled to the body body 9a in a state where the AF drive unit 32 is assembled at a predetermined position of the body body 9a. In this case, the fixing portions 35a, 35b, 35c are respectively brought into contact with the corresponding portions of the body 9a, and the fixing screws 36 inserted from the back side of the body 9a are screwed into the screw holes of the fixing portions 35a, 35b, 35c. Screw it on.
As a result, the front plate member 9b has three fixing portions 35a,
It is fixed to the body 9a by 35b and 35c.

In this state, the AF of the front plate member 9b is
Since the back surface side of the joint 23 is unstable in strength, the base portion 26 in a position close to the AF joint 23 is fixed to the base portion 25 of the front wall surface 34 via the connecting metal member 29. That is, the first support surface 29e is used as the front surface 2 of the base 26.
6b, and the second support surface 29f is attached to the rear surface 26c of the base portion 26 while fitting the connecting portion 29d into the engagement groove 26a.
Apply to. In this state, the fixing screw 27 inserted into the screw hole of the screw fastening portion 29a is screwed into the screw hole of the base portion 25. As a result, the screw fastening portion 29a is fixed to the base portion 25, that is, the body body 9a. Therefore, the front plate member 9b
Is fixed to the body 9a at four positions surrounding the aperture 20, so that the load in each direction received from the taking lens 18 mounted on the mount 17 (bending stress in the vertical and horizontal directions, when pushed backward) It is possible to sufficiently secure the strength against the compressive force and the tensile force when pulled forward.

[0017]

As described above, according to the body structure of the camera of the present invention, since the connecting metal member which connects the body body and the front plate member and which is a separate member from each other is provided, it is required to be compact, for example. In response to this, even when the back surface of the front plate member is scraped, it is possible to secure the necessary strength against the load.

[Brief description of drawings]

FIG. 1 is a front view showing a body structure of a camera according to the present invention.

FIG. 2 is a bottom view showing the body structure.

FIG. 3 is a side view showing the body structure.

FIG. 4 is a perspective view of a main part of the body structure as seen obliquely from below.

FIG. 5 is an enlarged front view showing a main part of the body structure.

FIG. 6 is a side view showing a main part of the body structure.

FIG. 7 is a perspective external view showing a single-lens reflex camera to which the same body structure is applied.

[Explanation of symbols]

 8 annular mount member 9 camera body 9a body body 9b front plate member 11 camera 17 mount part 18 photographing lens 25 26 stand part 26b front plate member front face 26c front plate member rear face 27 36 fixing screw 29 connecting metal member 29a screwing part 29b 29c Parallel part 29d Connection part 29e 1st support surface 29f 2nd support surface

Claims (2)

[Claims] 1. A camera comprising: a body body made of a synthetic resin material having a photographing opening; a front plate member made of a synthetic resin material, which is equipped with a mount part to which a photographing lens is attachable / detachable and fixed to the body body. The body structure of the camera according to claim 1, further comprising a connecting metal member that connects the body main body and the front plate member and that is a separate member. 2. The connecting metal member according to claim 1, wherein the connecting metal member has at one end thereof a screwing portion screwed to the body body, and at the other end thereof, a tensile force applied to the front plate member in the optical axis direction. A body structure of a camera having first and second supporting surfaces that receive a force and a compressive force.