JP6156021B2 - Rotating member rotation state detection mechanism and electronic device - Google Patents

Description

  The present invention relates to a rotation state detection mechanism for a rotation member such as a liquid crystal monitor and an electronic apparatus including a rotation member with the rotation state detection mechanism.

For example, Patent Document 1 discloses a rotation detection switch mechanism of a liquid crystal monitor provided in a camera body via a biaxial hinge in a video camera.
In the rotation detection switch mechanism disclosed in Patent Document 1, the cam (rotary shaft body) 20 is pivotally attached to the hole (support hole) 17a of the metal plate (rotation regulating member) 17 if the reference numerals in the drawing are also written. After that, the liquid crystal monitor (image display unit) 3 is engaged. When the liquid crystal monitor 3 is rotated in the clockwise direction in FIG. 6, the cam 20 is similarly rotated, and the projection (rotation restricting piece) 20 c of the switch (rotation detection switch) 26 on which the metal plate 17 is mounted. The lever (pressing lever) 26c is pushed, and the switch 26 is turned on.

  Patent Documents 2 and 3 propose a rotation detection switch mechanism for a liquid crystal monitor provided in a camera body via a biaxial hinge in a digital camera.

Japanese Patent Laid-Open No. 2003-51970 JP 2007-96888 A JP 2012-216938 A

By the way, in the rotation detection switch mechanism of Patent Document 1, if the gap between the cam 20 and the metal plate 17 is large, or conversely, the cam 20 and the metal plate 17 are rattled or rotated. It becomes astringent. Moreover, if the mounting position of the switch 26 is bad, the angle (position) of the lever 26c will shift.
Therefore, not only does the angle detection accuracy of the switch 26 decrease, but in the worst case, the protrusion 20c swings without pressing the lever 26c, or the lever 26c itself does not reach until the contact inside the switch 26 is turned ON. The problem may occur.

Further, the position at which the switch 26 is turned on is shifted due to the backlash between the cam 20 and the metal plate 17 and the inaccuracy of the mounting position of the switch 26. As a result, the rotation angle of the liquid crystal monitor 3 is inconsistent and the switch 26 is turned on. It becomes a slap.
It may not be a problem if only a rough rotation of 90 ° to 180 ° is detected as in a liquid crystal monitor of a camera. For example, in a device that can rotate 180 °, whether it exceeds 90 ° or not. This can be a big problem in the case where different processes are performed or in a device where the rotation angle must be detected more severely.

  Even if there is no backlash between the cam 20 and the metal plate 17 or the mounting position of the switch 26, it is separated from the place where the liquid crystal monitor is pivotally supported for the sake of strength, design and design. If a cam or a rotation detection switch is provided at a location, the cam may be displaced from the center point of the shaft support, and the cam may be decentered and rotation may not be accurately detected. Also, if the camshaft center point and cam rotation center point are misaligned without installing a cam or rotation detection switch, the cam will rotate eccentrically. The same problem arises.

  Such a problem also occurs in the rotation detection switch mechanisms of Patent Documents 2 and 3.

  An object of the present invention is to detect the rotation state of the rotation member even if the cam that detects the rotation state of the rotation shaft of the rotation member provided so as to be rotatable with respect to the main body is rotated eccentrically. It is to keep the accuracy without degrading.

In order to solve the above problems, the present invention provides:
A rotating member that is rotatably assembled to the main body via a rotating shaft;
A transmission member for transmitting the rotation state of the rotation shaft;
A switch mounting member that is connected to the transmission member in a movable state and mounts a rotation state detection switch that performs ON / OFF operation according to the rotation state of the transmission member;
A floating support member fixed to the main body and supporting the switch mounting member in a floating state ,
The switch mounting member is
Having a shaft portion inserted into the shaft hole of the transmission member at one end portion,
A rotating member detecting mechanism for the rotating member has a protrusion at the other end that can be vertically moved and rotated with respect to the floating support member and is floatingly supported in a state where only the left and right direction is restricted .

According to the present invention, even when the cam that detects the rotation state of the rotation shaft of the rotation member is rotated eccentrically, the rotation state of the rotation member can be detected with high accuracy.
Further, since it is not necessary to adjust the mounting position of the rotation state detection switch, productivity can be improved.

It is the perspective view which shows a camera as a structure of one Embodiment of the electronic device to which this invention is applied, (a) seen from the front side, (b) seen from the back side. It is a disassembled enlarged view of the rotation state detection mechanism of FIG.1 (b). It is the enlarged view (a) of the switch mounting member of FIG. 2, and the figure (b) seen from the opposite side. It is a principal part enlarged view of the floating support member of FIG. It is a sectional side view which shows the state whose opening-and-closing angle of the rotation member of FIG. 1 is 0 degree. It is a principal part enlarged view of FIG. It is a sectional side view which shows the state whose opening-and-closing angle of the rotation member of FIG. 1 is about 135 degrees. It is a principal part enlarged view of FIG. It is a sectional side view which shows the state whose opening / closing angle of the rotation member of FIG. 1 is about 180 degrees. It is a principal part enlarged view of FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment)
1A and 1B show a camera as a configuration of an embodiment of an electronic apparatus to which the present invention is applied.

  As shown in the figure, in the camera, the liquid crystal monitor 3 rotates integrally around a pair of left and right sheet metal rotation shafts 4 from the back side of the main body 1, and opens approximately 180 ° to be placed on the main body 1. Is standing upright.

  FIG. 2 shows a state where the rotation state detection mechanism of the liquid crystal monitor 3 is disassembled and enlarged.

  As shown in the figure, the liquid crystal monitor 3 has a shaft portion 4a on one side portion of a rotation shaft 4 made of sheet metal, and is rotatably coupled to one side portion of a fixed plate 2 fixed to the upper part of the back surface of the main body 1. Thus, it rotates about the rotation shaft 4.

  In the illustrated example, the rotation shaft 4 made of sheet metal projects to the back side of the main body 1 in order to eliminate the need to form a relief notch on the upper surface of the main body 1 or to stand the liquid crystal monitor 3 vertically upward. For example. The reason why the width of the rotating shaft 4 made of sheet metal is wide is to ensure the necessary strength.

In addition, although not shown in figure, the substantially identical resin plate is affixed to the inner surface of the rotation axis | shaft 4 made from a sheet metal, and the cam 5 is integrally molded by the other side part of the resin plate.
Accordingly, the rotation state is transmitted to the cam 5, and the cam 5 also rotates together with the rotation shaft 4.

The cam 5 passes through the notch 6d (see FIG. 3) at the top of the switch holder 6 and pushes the lever 7a of the rotation state detection switch 7 to turn on the switch.
The cam 5 is formed with a shaft hole 5a coaxial with the shaft portion 4a on one side of the rotation shaft 4, and a switch holder 6 for mounting the rotation state detection switch 7 is installed in the shaft hole 5a. The shaft portion 6a is inserted.

  In addition, a recess is formed in the upper part of the back surface of the main body 1 for storing the rotation shaft 4 made of sheet metal when the liquid crystal monitor 3 is folded. For this reason, a rotation state detection mechanism including a cam 5, a switch holder 6, a rotation state detection switch 7, and a fixing member 8 is built in the upper back of the main body 1 outside the recess.

As shown in FIGS. 3A and 3B, the switch holder 6 has a shaft portion 6a in the upper portion, a recessed switch mounting portion 6b in the upper and lower intermediate portions, and an assembly protrusion 6c in the lower portion. Notches 6d are formed in the upper part.
The switch holder 6 is mounted with a rotation state detection switch (hereinafter simply referred to as a switch) 7 provided with a lever 7a in the switch mounting portion 6b. Strength is ensured by the three-dimensional shape of the upper and lower parts.

  As shown in the figure, the assembly protrusion 6c has a substantially cylindrical shape protruding from the plate surface of the switch holder 6 in the same direction as the shaft portion 6a.

The fixing member 8 is a floating support member that is fixed to the upper part of the back surface of the main body 1 and forms a built-in portion 8a in which the switch holder 6 is supported in a floating manner.
The fixing member 8 ensures strength by a three-dimensional shape including a plate shape fixed to the upper part of the back surface of the main body 1 and a built-in portion 8a protruding to the side as shown in the drawing.

As shown in FIG. 4, the built-in portion 8a has an opening 8b formed in a substantially upper half portion and a vertical groove 8c formed in a substantially lower half portion. The groove 8c is continuous with the center of the opening 8b.

In the assembling portion 8a of the fixing member 8 described above, the substantially cylindrical mounting protrusion 6c of the switch holder 6 is fitted into the groove 8c from the opening 8b so that it can be moved up and down and moved only in the left-right direction. The switch holder 6 is supported in a floating state in a state in which is controlled.
The mounting protrusion 6 c of the switch holder 6 is prevented from being detached from the groove 8 c of the fixing member 8 due to its substantially cylindrical shape and the positional relationship between the fixing plate 2 and the fixing member 8.

  FIG. 5 shows a state in which the opening / closing angle of the liquid crystal monitor 3 is 0 ° (folded state on the back side of the main body 1).

  As shown in an enlarged view in FIG. 6, the cam 5 is located above, is not in contact with the lever 7 a of the switch 7, and the switch 7 is OFF.

  FIG. 7 shows a state in which the opening / closing angle of the liquid crystal monitor 3 is approximately 135 ° (a state where the liquid crystal monitor 3 is standing up above the main body 1).

  As shown in an enlarged view in FIG. 8, when the cam 5 rotates and contacts the lever 7a of the switch 7, the switch 7 is still OFF, but when the liquid crystal monitor 3 further rotates, the switch 7 Turns on.

  FIG. 9 shows a state in which the opening / closing angle of the liquid crystal monitor 3 is approximately 180 ° (vertical state above the main body 1).

  As shown in an enlarged view in FIG. 10, the cam 5 pushes the lever 7a of the switch 7, and the switch 7 is ON.

In the above, the switch holder 6 is inserted into the shaft hole 5a of the cam 5 at the shaft portion 6a. For example, the shaft portion 4a of the rotation shaft 4 of the liquid crystal monitor 3 is rattled and rotated. Even if the shaft hole 5a rotates eccentrically with respect to the shaft portion 4a of the rotating shaft 4, the relative position of the cam 5 and the switch 7 follows without changing.
Therefore, the positional relationship between the lever 7a of the switch 7 and the cam 5 is always constant, and the cam 5 presses the lever 7a of the switch 7 with high accuracy.

On the other hand, the switch holder 6 is held at a substantially constant angle because the assembling protrusion 6c fits into the groove 8c of the fixing member 8 and the movement in the left-right direction is restricted.
Therefore, the switch 7 supported by the switch holder 6 can detect the cam 5 with high accuracy while maintaining a substantially constant angle.
Further, since the switch holder 6 is allowed to move up and down and turn with respect to the fixing member 8, even if the shaft hole 5a of the cam 5 is eccentric with respect to the shaft portion 4a of the turning shaft 4, Each part is not damaged during rotation.

  That is, even if the cam 5 integrated with the sheet metal rotation shaft 4 of the liquid crystal monitor 3 rotates eccentrically with the shaft portion 4a, the positional relationship between the lever 7a of the switch 7 and the cam 5 is always constant. Since the assembling protrusion 6c of the switch holder 6 is restricted from moving in the left-right direction, the switch 7 can detect the cam 5 with high accuracy.

As described above, according to the rotation state detection mechanism of the liquid crystal monitor 3 of the embodiment, the shaft 5a is movably connected to the shaft hole 5a of the cam 5 that transmits the rotation state of the rotation shaft 4, and the rotation of the cam 5 is performed. Since the switch holder 6 mounted with the switch 7 that performs ON / OFF operation according to the state is supported in a floating state by the fixing member 8 fixed to the main body 1, the shaft portion 4 a of the rotating shaft 4 and the cam 5 Even if the shaft hole 5a is eccentric, the angle can be detected with high accuracy.
Therefore, there is no need to adjust the mounting position of the switch 7, and productivity is improved.

(Modification)
In the above embodiment, the liquid crystal monitor of the camera is used. However, the present invention is not limited to this, and other display units and other rotating members such as covers and handles of various devices may be used. Also good.
Furthermore, it is not limited to a camera, and may be another electronic device such as a mobile phone equipped with a camera.
In addition, the cam shape of the transmission member, the shape of the switch mounting member, the shape of the floating support member, and the opening / closing angle are not limited to those of the embodiment, and other specific detailed structures can be appropriately changed. Of course.

As mentioned above, although several embodiment of this invention was described, the scope of the present invention is not limited to the above-mentioned embodiment, The range of the invention described in the claim, and its equivalent range Including.
The invention described in the scope of claims attached to the application of this application will be added below.
The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.
[Appendix]
<Claim 1>
A rotating member that is rotatably assembled to the main body via a rotating shaft;
A transmission member for transmitting the rotation state of the rotation shaft;
A switch mounting member that is connected to the transmission member in a movable state and mounts a rotation state detection switch that performs ON / OFF operation according to the rotation state of the transmission member;
And a floating support member fixed to the main body and supporting the switch mounting member in a floating state.
<Claim 2>
The rotation state detection mechanism of the rotation member according to claim 1, wherein the transmission member is disposed at a position separated in an axial direction from a shaft portion at one end of the rotation shaft.
<Claim 3>
3. The rotation state detection mechanism of the rotation member according to claim 1, wherein the transmission member is a cam that presses a lever of the rotation state detection switch to perform a switch ON operation. 4.
<Claim 4>
The switch mounting member is
Having a shaft portion inserted into the shaft hole of the transmission member at one end portion,
4. The projection according to claim 1, further comprising: a protrusion at the other end that can be vertically moved and rotated with respect to the floating support member and is supported in a floating state in a restricted state in the left-right direction. 5. The rotation state detection mechanism of the described rotation member.
<Claim 5>
The said floating support member has a groove | channel which carries out floating support in the state which inserted a part of said switch mounting member, can be moved up and down, and was controlled only in the left-right direction. The rotation state detection mechanism of the rotation member as described in any one of these.
<Claim 6>
An electronic apparatus comprising the rotation member with the rotation state detection mechanism according to any one of claims 1 to 5.

DESCRIPTION OF SYMBOLS 1 Main body 2 Fixed plate 3 Rotating member 4 Rotating shaft 4a Shaft part 5 Transmission member 5a Shaft hole 6 Switch mounting member 6a Shaft part 6b Switch mounting part 6c Assembling projection 6d Notch 7 Rotation state detection switch 7a Lever 8 Floating support member 8a Built-in portion 8b Opening 8c Groove

Claims (5)

A rotating member that is rotatably assembled to the main body via a rotating shaft;
A transmission member for transmitting the rotation state of the rotation shaft;
A switch mounting member that is connected to the transmission member in a movable state and mounts a rotation state detection switch that performs ON / OFF operation according to the rotation state of the transmission member;
A floating support member fixed to the main body and supporting the switch mounting member in a floating state ,
The switch mounting member is
Having a shaft portion inserted into the shaft hole of the transmission member at one end portion,
A rotation state detection mechanism for a rotation member, characterized in that it has a protrusion at the other end that can be vertically moved and rotated with respect to the floating support member, and is supported in a floating state in a restricted state in the left-right direction .   The rotation state detection mechanism of the rotation member according to claim 1, wherein the transmission member is disposed at a position separated in an axial direction from a shaft portion at one end of the rotation shaft. 3. The rotation state detection mechanism of the rotation member according to claim 1, wherein the transmission member is a cam that presses a lever of the rotation state detection switch to perform a switch ON operation. 4. Said floating support member claims 1 to 3, characterized in that it has a groove for floating support in a state of being restricted by inserting only part vertically movable and rotatable in the horizontal direction of the switch mounting member The rotation state detection mechanism of the rotation member as described in any one of these. An electronic apparatus comprising the rotation member with the rotation state detection mechanism according to any one of claims 1 to 4 .

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