JP2000047305A - Structure for release switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a release switch whose thickness in a stroke direction is reduced and whose waterproof structure is simple without making a molding die of a body complicated. SOLUTION: This release switch 11 is mainly constituted of a switch operation member 4 and an electric armature 7 turning on and off a switch contact on a switch substrate 8 and the switch operation member 4 is provided with an operation button part 4a and an arm part 4b. The operation button part 4a is inserted into a button insertion aperture part 1a of a body, the arm part 4b is inserted into an insertion through-hole 1d, an insertion hole 2a of the body and they are turnably supported. Further, a pressing pin 5 pressing the electric armature 7 and elastically deformable diaphragm rubber 6 are attached to the switch operation member 4. The electric armature 7 is pressed by the pressing pin 5 when the operation button part 4a is pressed and operated so that an operation signal is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a release switch provided on a main body of a camera or the like.

[0002]

2. Description of the Related Art Japanese Patent Laying-Open No. 9-185110, which has been proposed as a structure of a release switch provided in a camera body, has a release button which moves in one direction with respect to a switch unit on a printed circuit board. It is. The release button is provided with an engagement claw for preventing the release button from slipping out of the main body, and when the switch is released, the release claw is engaged with the notch of the main body by urging the release button with a spring. It is supposed to.

[0003]

However, in the structure of the release switch disclosed in Japanese Patent Application Laid-Open No. 9-185110, the thickness of the switch in the direction of the external stroke is reduced since the engagement claw is required. Can not do it. Further, since the cutout is formed in the main body so that the release button does not come off from the main body, the molding die of the main body becomes complicated. In addition, there was a problem that the waterproof structure around the release button became complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can reduce the thickness in the stroke direction, does not complicate the molding die of the main body, and has a waterproof structure. An object of the present invention is to provide a simple release switch structure.

[0005]

According to a first aspect of the present invention, there is provided a release switch having a switch operating member having an operating portion and an arm extending from the operating portion, and a switch operating member provided on the main body. The first where the operation unit of the switch operation member is located
And a second opening provided in communication with the first opening, the arm of the switch operating member swingingly moving, and the switch operating member is provided with: When the operation unit is operated, the arm rotates around the end of the arm.

According to a second aspect of the present invention, there is provided a release switch according to the first aspect, wherein the end of the arm is held by an engaging member separate from the main body. The engaging member defines a position of the operation portion with respect to the first opening of the main body and a rotation center position of the arm by engaging with the main body.

According to a third aspect of the present invention, in the release switch structure according to the second aspect, the switch operating member is provided with a swing inside the main body by the operation of the switch operating member. A shaft member for transmitting is mounted, and the shaft member is inserted through a shaft member insertion hole provided on the bottom surface of the first opening,
Further, an elastic member which is a member through which the shaft member is inserted and which covers the shaft member insertion hole is attached between the shaft member insertion hole and the operation section.

According to a fourth aspect of the present invention, there is provided a release switch, comprising: a switch operating member having an operating portion and an arm extending from the operating portion; and an operating portion forming the switch operating member. A first body having an opening that defines
A position of the operation unit and a rotation center position of the arm are provided on the first body by engaging a holding portion for holding the end of the arm and engaging the first body. A second body defining the defined opening.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a camera incorporating a release switch according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the release switch, FIG. 3 is a longitudinal sectional view of the release switch, and FIG. FIG. 3 is a plan view of the release switch.

As shown in FIG. 1, the camera has a front cover 1 and a rear cover 2 serving as a camera body. The front cover 1 has a photographic lens barrel 3 on the front and a release switch 11 on the top. Are arranged. On the rear cover 2, a zoom switch 12 for performing a telephoto operation and a wide operation of the photographing lens is provided on an upper surface portion.

As shown in FIG. 2, the release switch 11 is supported by a front cover 1 as a first main body and a rear cover 2 as a second main body. A pressing pin 5 as a shaft member, a diaphragm 6 as an elastic member formed of silicone rubber, an elastically deformable electric contact piece 7 as a convex thin plate member, a printed circuit board 8 having a switch contact pattern, A substrate support plate 9 for supporting the substrate 8.

The switch operation member 4 includes an operation button 4a inserted into a bottomed button insertion opening 1a which is a first opening of the front cover 1, and two switch operation members 4 extending from the operation button 4a. Arm 4b. The operation button portion 4a is provided with a ring-shaped convex portion 4e on the back surface of which the pin fitting hole 4d and the diaphragm are fitted. At the tip of the arm 4b, there is provided a projection 4c serving as a rotation center.

The pressing pin 5 has a flange portion 5a, a press-fitting portion 5b formed on the upper portion thereof and press-fitted into the operation button portion pin fitting hole 4d, and a tip pressing portion 5c for pressing a central portion of the electric contact piece 7. have.

The diaphragm 6 has an insertion hole 6a through which the press-fit portion 5b of the pressing pin is inserted, a fitting portion 6b fitted into the ring-shaped convex portion 4e of the switch operating member, and a center of the button insertion opening of the front cover. Seat 6 attachable to recess 1b provided
c and an elastically deformable thin portion 6d.

The electric contact piece 7 is disposed on the back surface of the front cover 1 and has a curved convex pressed portion 7a and positioning notches 7b provided at both ends.

The printed circuit board 8 includes a common side pattern 8a which is always in contact with the outer periphery of the electric contact piece 7, a contact pattern 8c for the first-stage release signal, a contact pattern 8b for the second-stage release signal, and a printed circuit board. And a guide hole 8d through which the positioning pin 9a of the support plate 9 is inserted.

The front cover 1 has an insertion hole 1c through which the pressing pin 5 is inserted, in addition to the button insertion opening 1a and the recess 1b.
And an insertion hole 1d of the second opening, which is provided in communication with the side surface of the button insertion opening 1a and through which the arm 4b of the switch operating member is inserted, and holds the projection 4c of the arm 4b at a predetermined position. Projection 1e is provided. The release position of the operation button 4a of the switch operation member is such that the arm portion 4b is in the insertion hole 1d.
Is positioned in contact with the upper surface of the.

The arm 4b of the switch operating member can be rotatably inserted into the rear cover 2, and the protrusion 4 of the arm 4b is provided.
An insertion hole 2a having a bottom surface 2b with which the tip of c contacts is provided.

To assemble the release switch 11 configured as described above, first, as shown in FIG. 3, the printed board 8 is mounted on the board supporting plate 9 on the back side of the button insertion opening 1a of the front cover 1. The electric contact piece 7 is positioned on the printed board 8 by the positioning pins 9a of the board supporting plate 9.

The diaphragm 6 is mounted on the ring-shaped convex portion 4e of the switch operating member 4 in a state where the adhesive is applied to the fitting portion 6b, and the pressing pin 5 is further pressed into the press-fitting portion 5b.
Is inserted through the insertion hole 6a of the diaphragm 6 and pressed into the pin fitting hole 4d of the switch operation member 4. In this state, the diaphragm 6 makes the ring-shaped convex portion 4e of the switch operating member 4
And the flange 5a of the pressing pin 5 are held, and the space between the fitting hole 6b and the ring-shaped convex portion 4e is sealed by an adhesive.

Thereafter, the diaphragm 6 and the pressing pin 5
Is attached to the front cover 1 and the rear cover 2. That is, the arm 4b of the switch operating member 4 and the projection 1e of the front cover 1 are inserted into the insertion hole 1d of the front cover 1. Then, with the adhesive applied to the central concave portion 1b of the button insertion opening 1a, the pressing portion 5c of the pressing pin 5 is inserted through the insertion hole 1c of the front cover 1, and the seat 6c of the diaphragm 6 is further inserted into the button. It is fitted and fixed in the concave portion 1b at the center of the insertion opening. In this state, the front cover 1
The space between the recess 1b and the seat 6c of the diaphragm 6 is sealed by an adhesive, and the button insertion opening 1a of the front cover 1 is inserted through the seal between the fitting hole 6b and the ring-shaped protrusion 4e. The area around the hole 1c is completely waterproof against the inside.

Further, when the rear cover 2 is attached to the front cover 1 while inserting the arm 4b of the switch operating member into the insertion hole 2a, the assembly of the release switch 11 is completed. In this assembled state, the switch operating member 4 is
As shown in FIGS. 3 and 4, the projection 4c at the tip of the arm 4b is rotatable with the front-rear direction regulated by the bottom 2b of the insertion hole 2a of the rear cover 2 and the tip of the projection 1e of the front cover 1. Will be supported.

The release switch 11 of the present embodiment assembled as described above is biased upward by the biasing force of the diaphragm 6 and the biasing force of the electric connection piece 7 when the operation button portion 4a is released. At the release position, the contact patterns 8b and 8c for the first and second release signals are both in the OFF state. In this state, the arm portion 4b of the switch operation member 4 contacts the upper surface of the insertion hole 1d of the front cover 1, and the operation button portion 4a
Release position is determined.

When the operation button portion 4a is pressed in the F direction, the electric contact piece 7 is pressed by the pressing pin 5, and first, the contact pattern 8b comes into contact, and the first-stage release ON signal is output. Further, when pressed, the contact pattern 8b comes into contact, and a release second-stage ON signal is output.

According to the release switch 11 of this embodiment described above, it is necessary to provide a claw for preventing the operation button from slipping out of the insertion opening of the operation button as in the structure of the conventional release switch described above. Therefore, the thickness in the stroke direction can be reduced, the required space around the release switch section can be reduced, and the molding die for the front cover 1 can be simplified. Also,
When attaching the diaphragm 6 which is an elastic member, a waterproof structure can be obtained simply by applying an adhesive to key points and assembling the adhesive. Further, the operability is good because the switch operation member is turned, and the switch can be reliably operated because the fulcrum of the turn can be arranged at a position away from the operation button.

(Supplementary Note) Based on the embodiments of the present invention described above, it is possible to obtain a release switch structure having the following configuration. That is, (1) a switch operating member having an operating portion, an arm extending from the operating portion, and a pressing portion for pressing an electric contact portion, the switch operating member rotating around an end of the arm, and a main body. A first opening having a pressing part insertion hole through which the operating part of the switch operating member is located and the pressing part being inserted into a bottom surface thereof; and a first opening provided in communication with the first opening. A second opening in which an arm of the switch operating member swings and the pressing portion insertion hole, and is disposed between the switch operating member and the first opening; An elastic member that is elastically deformable so as to allow rotation of the switch operating member, and the switch operating member of the elastic member, and a first opening with respect to the elastic member. The pressing portion insertion hole of the first opening is formed by bonding the contact surfaces of Structure of release switch and forming a waterproof structure.

[0027]

As described above, according to the structure of the release switch according to the first, second or fourth aspect of the present invention, the end portion of the arm portion in which the switch operating member is disposed apart from the operating portion. , The operation of the switch operation member becomes very easy, and erroneous operation can be prevented.

According to the structure of the release switch according to the third aspect of the present invention, the elastic member through which the switch pressing shaft member is inserted is interposed between the switch operating member and the main body. In the case of a waterproof structure, the first opening of the main body can be sealed by the elastic member, and the waterproof structure can be obtained extremely easily.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a camera to which a release switch according to an embodiment of the present invention is applied.

FIG. 2 is an exploded perspective view of a release switch applied to the camera of FIG.

FIG. 3 is a longitudinal sectional view of the release switch of FIG. 2;

FIG. 4 is a plan view of the release switch of FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Front cover (1st main body) 1a ... Button insertion opening (1st opening) 1d ... Insertion hole (2nd opening) 2 ... Rear cover (2nd main body) 2b ... ... Bottom of insertion hole of rear cover (holding part for holding arm end) 4... Switch operating member 4a... Operating button part (operating part) 4b... Arm part 4c. Arm end) 6 Diaphragm (elastic member)

Claims (4)

[Claims] A switch operating member having an operating portion and an arm extending from the operating portion; a first opening provided in the main body, wherein the operating portion of the switch operating member is located; A second opening provided in communication with the opening of the first operating member, wherein the arm of the switch operating member swings. The second operating portion is operated by the operating portion. A release switch that rotates about an end of the arm when the release switch is turned on. 2. An end portion of the arm portion is held by an engaging member separate from the main body, and the engaging member engages with the main body to form a first opening of the main body. The structure of the release switch according to claim 1, wherein a position of the operation unit with respect to the unit and a rotation center position of the arm unit are defined. 3. The switch operating member is provided with a shaft member for transmitting a swing caused by the operation of the switch operating member inside the main body, and the shaft member is provided with the first opening. A shaft member insertion hole provided in the bottom surface of the, is further a member through which the shaft member is inserted,
3. The release switch structure according to claim 2, wherein an elastic member covering said shaft member insertion hole is attached between said shaft member insertion hole and said operating portion. 4. A switch operating member having an operating portion and an arm extending from the operating portion; a first main body having an opening in which the operating portion constituting the switch operating member is located; The first body includes a holding portion for holding an end of the arm, and a position of the operation portion and a rotation center position of the arm are provided on the first body by engaging with the first body. And a second body defined for the opening.