JP5158005B2 - Door rotation mechanism and electronic device including the same - Google Patents

Description

  The present invention relates to a door rotation mechanism and an electronic apparatus including the door rotation mechanism.

  Known electronic devices include an operation unit for external operation and a terminal connection unit for connection to an external device, and a door that opens and closes the operation unit and the terminal connection unit when not in use or not connected. For example, there is an electronic device described in Patent Document 1.

  An electronic device described in Patent Document 1 is an imaging device, and includes a slot for inserting and removing a memory card that is a part of a housing and an opening / closing door that rotates to cover a vicinity thereof.

JP 2006-067274 A

In recent years, downsizing of electronic devices has been pursued.
Therefore, it is desired that the door turning mechanism is a compact mechanism that can be accommodated in a small volume.

Further, when the electronic device is a product appealing for a high-class feeling, it is desired to satisfy the user's expectation by providing a good feeling of turning the door that the user opens and closes with a finger or the like.
For example, when the door is favorably guided to the open position and the closed position in the rotation, and the rotation mechanism to which an appropriate rotation resistance is applied to the movement between the two positions, the user can perform the rotation operation of the door. Can feel a sense of luxury.
This door rotation mechanism that can feel a high-class feeling can be realized well by using a cam mechanism. Specifically, it is a cam mechanism that urges the cam surface and the contact sliding on the cam surface in the extending direction of the rotation shaft.

  However, in this cam mechanism, the urging member, the cam member, and the contact are arranged in a row in the extending direction of the rotation shaft that is normally set in the longitudinal direction of the door, so that the longitudinal dimension is further increased. As a result, there is a problem that it is difficult to make the electronic device compact.

Therefore, the present invention provides a compact door rotation mechanism that rotates the door with a good feel.
Moreover, it aims at providing the compact electronic device provided with the door rotation mechanism.

In order to solve the above problems, the present invention has the following configurations 1) to 4).
1) a door (2) having an engagement portion (2d) and a contact portion (2f);
A guide portion (6a6) that engages with the engagement portion (2d) and allows the door (2) to move around a predetermined axis (KZ1) along a predetermined locus;
A cam (4) having a cam surface (4am) with which the contact portion contacts;
A biasing member (5) for biasing the cam (4) in a direction perpendicular to the extending direction of the predetermined axis (KZ1) so as to press the cam surface (4am) against the contact portion (2f);
A door rotation mechanism (51) provided with
2) The contact portion (2f) has a rolling contact surface (TS) that makes rolling contact with the cam surface (4am) in response to the movement of the door (2) along the predetermined locus. The door rotation mechanism (51) described in 1).
3) The predetermined axis (KZ1) is set to move in parallel with the movement of the door (2) along the predetermined locus, and the door rotation according to 1) or 2) Mechanism (51).
4) Case (KT),
1) to 3) a door rotation mechanism (51) according to any one of
The door (2) of the door rotation mechanism (51) is
The electronic device (50) is characterized in that the electronic device (50) moves between a closed position where the operation section or the connection terminal section provided in the casing (KT) is hidden from the outside and an open position where the operation section or the connection terminal section is exposed.

  According to the present invention, there is an effect that the rotation mechanism is compact and the door can be rotated with a good feel.

It is a side view for demonstrating the Example of the electronic device of this invention. It is a fragmentary perspective view for demonstrating the external appearance of the principal part in the Example of the electronic device of this invention. It is an exploded view for demonstrating the Example of the door rotation mechanism of this invention. It is a three-view figure of the 1st component in the Example of the door rotation mechanism of this invention. It is a 6th page figure of the 2nd part in the example of the door rotation mechanism of the present invention. It is a 6th page figure of the 3rd part in the example of the door rotation mechanism of the present invention. It is a four-view figure of the 4th component in the Example of the door rotation mechanism of this invention. It is the fragmentary top view and fragmentary perspective view for demonstrating the principal part of the 2nd components in the Example of the door rotation mechanism of this invention. It is the fragmentary top view and fragmentary perspective view for demonstrating the principal part of the 4th components in the Example of the door rotation mechanism of this invention. It is a 1st partial top view for demonstrating the Example of the door rotation mechanism of this invention. It is a 2nd partial top view for demonstrating the Example of the door rotation mechanism of this invention. It is a 3rd partial top view for demonstrating the Example of the door rotation mechanism of this invention. It is a 4th partial top view for demonstrating the Example of the door rotation mechanism of this invention. It is a 5th partial top view for demonstrating the Example of the door rotation mechanism of this invention. It is a graph for demonstrating the rotation resistance in the Example of the door rotation mechanism of this invention.

  An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a side view showing an embodiment of an electronic apparatus provided with a door rotation mechanism of the present invention. The direction of the front and back is defined as shown in FIG. Further, the front side of the page is the right direction, and the back direction of the page is the left direction.
This electronic device is the imaging device 50.

The imaging device 50 has a lens unit 50A that forms an image of a subject in front, and an imaging element SS that is an electronic component that has a housing KT and converts light from the lens unit 50A into an electrical signal in the housing. The main body 50B, an image monitor 50C provided on the right side surface of the main body 50B and opened and closed with respect to the main body 50B, and a viewfinder 50D provided on the rear side of the main body 50B.
FIG. 1 shows a state in which the image monitor unit 50C is closed with respect to the main body unit 50B.

Two card slots 1A and 1B for inserting and removing a memory card such as an SD card are arranged below the image monitor unit 50C in the main body unit 50B so that their longitudinal directions are continuous. The arrangement direction of the card slots 1A and 1B is parallel to the optical axis CL of the lens unit 50A.
Hereinafter, the card slots 1A and 1B will be collectively referred to as a card slot 1. The card slots 1 </ b> A and 1 </ b> B are included in the connection terminal portion provided in the housing of the imaging device 50.

The main body 50B is provided with a door 2 that rotates between a closed state that covers the card slot 1 and an open state that exposes the card slot 1 to the outside. FIG. 1 shows an open state in which the door 2 is rotated downward and the card slot 1 and its vicinity are exposed to the outside.
In the following description, the door 2 covers the card slot 1 that covers the connection terminal portion. However, the present invention is not limited to this, and the door 2 covers the operation unit (operation buttons and switches) for operating the imaging device 50. There may be.

2A and 2B are perspective views of the vicinity of the card slot 1 of the main body 50B as viewed from the front and slightly below the imaging device 50. FIG.
2A shows a closed state in which the card slot 1 is covered with the door 2, and FIG. 2B shows that the door 2 is retracted below the main body 50B and the card slot 1 is exposed to the outside. The open state is shown.

The door 2 has transparent window portions 2a and 2b provided corresponding to the card slots 1A and 1B in the closed state, and rib-like convex portions 2c provided between the window portions 2a and 2b, respectively. doing. This convex part 2c becomes a finger hook when the door 2 is opened and closed.
By rotating the door 2 in the direction of the arrow DR1 from FIG. 2A, the card slot 1 is exposed to the outside and the open state shown in FIG. 2B is obtained.

FIG. 3 is an exploded view showing the door rotation mechanism 51 of the embodiment mounted on the imaging device 50.
The door rotation mechanism 51 includes a base 3 that is a part of the housing KT of the main body 50B, ring-shaped cam rings 4a and 4b, a pair of coil springs 5 and 5, guide covers 6a and 6b, and a door 2. And male screws 7 and 7.

  Here, each member is explained in full detail.

4A to 4C are three views of the base 3. 4A is a front view, FIG. 4B is a bottom view, and FIG. 4C is a left side view.
The base 3 is formed by resin injection molding and constitutes a part of the housing KT of the main body 50B.
A suitable material is PC (polycarbonate) / ABS (acrylonitrile butadiene styrene) alloy resin.
The base 3 may be integrally formed as the housing KT of the main body 50B, or may be formed separately from the housing KT and attached to the housing KT.
The base 3 has two openings 3a and 3b provided continuously in the longitudinal direction, and seats 3c1 and 3c2 that are recessed in a substantially cylindrical shape are formed on both outer sides in the continuous direction.
A through hole 3c3 is formed in the center of the seats 3c1 and 3c2.
Further, the ground-side surface of the base 3 is a recess 3d over the range of the width L. The recessed portion 3d accommodates the door 2 in a closed state, and in either of the opened and closed states, the exterior surface of the door 2 and the exterior surface of the base 3 are formed to obtain a high appearance quality and the imaging device 50. Even when the bottom surface of the main body 50B is placed on the mounting surface, the door 2 can be rotated to the open state. Thereby, for example, the door 2 can be opened and closed even when the main body 50B is mounted on a tripod head.

5A to 5F are six views of the cam ring 4a.
5 (a) is a front view, FIG. 5 (b) is a rear view, FIG. 5 (c) is a left side view, FIG. 5 (d) is a right side view, FIG. 5 (e) is a top view, and FIG. (F) is a bottom view.
FIG. 5A shows the vertical direction.
FIG. 5A corresponds to the posture of the cam ring 4a shown in FIG.
Since the cam ring 4b is substantially plane-symmetric with respect to the cam ring 4a, the cam ring 4a will be described below as a representative.

The cam ring 4a has a ring-shaped base 4ak and is formed by resin injection molding. A suitable material is POM (polyacetal) resin.
The base portion 4ak is provided with a protrusion 4a1 on the top side and a cam portion 4ac below the right side surface.
The cam portion 4ac is formed with a cam surface 4am on the front side of FIG.
Further, in FIG. 5A, a peripheral wall 4a2 that protrudes toward the front side of the paper is formed on the front side of the base 4ak.
In the cam ring 4a, the coil spring 5 abuts on a step portion 4a3 provided inside the peripheral wall portion 4a2 in a state where the door rotation mechanism 51 is assembled, and the back surface 4a4 of the base portion 4ak is on the bottom surface of the seat portion 3c1 of the base 3. It comes to contact.

6A to 6F are six views of the guide cover 6a.
6 (a) is a front view, FIG. 6 (b) is a rear view, FIG. 6 (c) is a right side view, FIG. 6 (d) is a left side view, FIG. 6 (e) is a top view, and FIG. (F) is a bottom view.
FIG. 6A shows the top and bottom directions.
FIG. 6A corresponds to the posture of the guide cover 6a shown in FIG.
Since the guide cover 6b is substantially plane-symmetric with respect to the guide cover 6a, the guide cover 6a will be described below as a representative.

The guide cover 6a is formed by resin injection molding. As a material suitable for the material, there is a grade of ABS resin with improved slidability.
In the rear view of FIG. 6B, the guide cover 6a has a cylindrical boss 6a1. At the center of the boss 6a1, a bottomed hole 6a2 serving as a pilot hole for a tapping screw (male screw 7) is formed.
In addition, an arc-shaped rib 6a3 that is concentric with the boss 6a1 and shorter than the boss 6a1 is provided around the boss 6a1, and a notch 6a4 is formed on the top side.
On the right side of the boss 6a1, a wall 6a5 extending in parallel to the axis of the boss is formed.
The wall 6a5 is formed with an arcuate guide slit 6a6 centered on the virtual center KC1. In FIG. 6C, the axis perpendicular to the paper surface passing through the virtual center KC1 becomes the rotation center axis KZ1 of the door 2 in a state where the door rotation mechanism 51 is assembled.
In the guide cover 6a, the cam ring 4a and the coil spring 5 are housed inside the arc-shaped rib 6a3 in a state where the door rotation mechanism 51 is assembled. At that time, the protrusion 4a1 of the cam ring 4a is engaged with the notch 6a4, and the position of the cam ring about the axis of the cam cover 6a is determined.
A protruding base 2d (described later) of the door 2 engages with the guide slit 6a6, and the protruding base 2d moves along the guide slit 6a6. Details of this guide structure will be described later.

7A to 7D are four views of the door 2.
7A is a front view, FIG. 7B is a bottom view, FIG. 7C is a rear view, and FIG. 7D is a left side view.
FIG. 7A shows the left and right directions.
FIG. 7A corresponds to the posture of the door 2 shown in FIG.

The door 2 is formed by resin injection molding. A suitable material is PC / ABS alloy resin.
The window portions 2a and 2b in FIG. 7A are formed of a transparent resin, and are fixed to the main body of the door 2 by adhesion or welding.
The convex part 2c becomes a finger hook when opening and closing the door 2 as described above.
On the left and right end surfaces 2e of the door 2, projecting base portions 2d that project outward in the left-right direction are formed. In addition, a contact portion 2f is provided on the end surface of the protruding base portion 2d.
In the door 2 with the door rotation mechanism 51 assembled, the protruding base 2d engages with the guide slit 6a6 of the guide cover 6a, and the side surface of the contact portion 2f comes into sliding contact with the cam surface 4am of the cam ring 4a. ing.

  Each member mentioned above is assembled as follows, for example, and is set as the door rotation mechanism 51. The description will be made using FIG. 3 as an example of assembling the left side mechanism of the left and right mechanisms.

First, the coil spring 5 is accommodated in the peripheral wall portion 4a2 of the cam ring 4a, and the cam ring 4a is mounted inside the arc-shaped rib 6a3 of the guide cover 6a while crushing the coil spring 5.
At that time, the protrusion 4a1 of the cam ring 4a is engaged with the notch 6a4 of the guide cover 6a. Further, the coil spring 5 is extrapolated to the boss 6a1 of the guide cover 6a. Further, the protruding base portion 2d of the door 2 is fitted into the guide slit 6a6 of the guide cover 6a so that the side surface of the contact portion 2f of the door 2 comes into contact with the cam surface 4am of the cam ring 4a.
Then, the male screw 7 which is a tapping screw is inserted into the through hole 3c3 of the base 3 from the back side, and is screwed into the bottomed hole 6a2 of the guide cover 6a until the guide cover 6a contacts the base 4, and the guide cover 6a and the base 3 is integrated.

In this state, the cam ring 4 a is urged toward the base 3 by the elastic force of the coil spring 5. That is, the cam surface 4am is pressed against the contact portion 2f.
Further, when an external force against the elastic force of the coil spring 5 is applied, the cam ring 4a is movable within a predetermined range in the axial direction.

  Next, the contact movement of the contact portion 2f with respect to the cam surface 4am and the rotation operation of the door 2 will be described in detail.

First, the cam surface 4am will be described in detail with reference to FIGS. 8 (a) and 8 (b).
FIG. 8A is a perspective view of the cam portion 4ac as viewed obliquely from the upper left side of FIG. 5B, and corresponds to a perspective view of the front side of the drawing from the upper side of the drawing in FIG.
FIG. 8B is an enlarged view of the vicinity of the cam portion 4ac in FIG.

In FIG. 8B, the cam surface 4am is set so as to be classified into three regions depending on the position of the center of curvature.
Specifically, the region C1, the region C2, and the region C3 are classified from the top to the bottom in FIG.
In the regions C1 and C3, the center of curvature is outward (to the right in the drawing) with respect to the cam surface 4am, and the region C2 sandwiched between both regions is inward (in the drawing, with respect to the cam surface 4am). It is on the left.
Accordingly, the regions C1 and C3 are regions that are recessed on the cam surface 4am, and the region C2 is a region that protrudes in a mountain shape on the cam surface 4am.

Next, the contact portion 2f will be described in detail with reference to FIGS. 9A and 9B.
FIG. 9A is a perspective view of the contact portion 2f as seen from the upper left side of FIG. 7A, and corresponds to a perspective view of the contact portion 2f as seen from the upper front side in FIG.
FIG. 9B is an enlarged view of the vicinity of the contact portion 2f in FIG.

In FIG. 9B, the protruding base 2d is formed in an arc shape having a width W2 with the virtual center KC2 as the center. In FIG. 9B, the axis perpendicular to the paper surface passing through the virtual center KC2 becomes the rotation center axis KZ2 of the door 2 in a state where the door rotation mechanism 51 is assembled.
Further, the contact portion 2f has an arc-shaped peripheral surface substantially the same as a part of the inner surface of the protruding base portion 2d as the inner surface 2f1, and a peripheral surface having a smaller curvature than the inner surface 2f1. And projecting from the projecting base 2d in a columnar shape.
Here, since the width W2 of the protruding base 2d is set slightly smaller than the width W6 (see FIG. 6) of the guide slit 6a6 of the guide cover 6a, the protruding base 2d has almost no play in the guide slit 6a6. Slide.
In the embodiment, in the state where the door rotation mechanism 51 is assembled, the virtual center KC1 and the virtual center KC2 coincide with each other. Therefore, the rotation center axis KZ1 and the rotation center axis KZ2 coincide.
Therefore, the door 2 can smoothly reciprocate along the locus and movement range corresponding to the guide slit 6a6.

  Thus, in this embodiment, since the guide slit 6a6 is formed in an arc shape centered on the virtual center KC2, the door 2 rotates about the virtual center axis KZ2.

Next, the relationship between the guide slit 6a6 and the cam surface 4am and the contact portion 6f in contact with the cam surface 4am at five positions which are important points in the movement from the closed position to the open position of the door 2 will be described with reference to FIGS. I will explain.
The door rotation mechanism 51 of the embodiment is provided with a position (referred to as a drag maximum position) where the rotation resistance is maximum between the closed position and the open position of the door 2. Each key point is the five positions described below.
1: Closed position 2: Between closed position and maximum drag position 3: Maximum drag position 4: Between maximum drag position and open position 5: Open position

(Position 1)
FIG. 10 shows a contact state of the door 2 at the closed position. In this state, the cam portion 4ac is urged by the coil spring 5 in the direction of the arrow F5.
At this position, the contact portion 2f is in contact with the contact point Q1 of the region C1 on the cam surface 4am at the contact point P1 on the end 2ft side of the outer surface 2f2.
Here, the distance between the virtual center KC1 (rotation center axis KZ1) and the contact point P1 (Q1) is set to L1.

(Position 2)
FIG. 11 shows a contact state between the closed position of the door 2 and the maximum drag position. In this state, the cam portion 4ac is urged by the coil spring 5 in the direction of the arrow F5.
At this position, the contact portion 2f contacts the contact point Q2 near the region C1 in the region C2 of the cam surface 4am at the contact point P2 farther from the end 2ft than the contact point P1 of the outer surface 2f2.
Here, the distance between the virtual center KC1 (rotation center axis KZ1) and the contact point P2 (Q2) is set to L2.

(Position 3)
FIG. 12 shows a contact state of the door 2 at the maximum drag position. In this state, the cam portion 4ac is urged by the coil spring 5 in the direction of the arrow F5.
At this position, the contact portion 2f is in contact with the contact point Q3 near the center of the region C2 of the cam surface 4am at the contact point P3 near the center of the outer surface 2f2.
Here, the distance between the virtual center KC1 and the contact point P3 (Q3) is set to L3.

(Position 4)
FIG. 13 shows a contact state between the maximum drag position of the door 2 and the open position. In this state, the cam portion 4ac is urged by the coil spring 5 in the direction of the arrow F5.
At this position, the contact portion 2f is in contact with a contact point Q4 near the region C3 in the region C2 of the cam surface 4am at a contact point P4 farther from the end 2ft than the contact point P3 of the outer surface 2f2.
Here, the distance between the virtual center KC1 (rotation center axis KZ1) and the contact point P4 (Q4) is set to L4.

(Position 5)
FIG. 14 shows a contact state in the open position of the door 2. In this state, the cam portion 4ac is urged by the coil spring 5 in the direction of the arrow F5.
At this position, the contact portion 2f is in contact with the contact point Q5 of the region C3 in the cam surface 4am at a contact point P5 farther from the end 2ft than the contact point P4 of the outer surface 2f2.
Here, the distance between the virtual center KC1 (rotation center axis KZ1) and the contact point P1 (Q1) is set to L5.

In the embodiment, in the above-described rotation operation, the contact portion 2f makes rolling contact with the cam surface 4am in the range of the contact points P1 to P5 corresponding to the movement between the 1 position and the 5 position of the door 2.
That is, the range of the contact points P1 to P5 on the side surface of the contact portion 2f is the rolling contact surface TS (see FIG. 9).

The rotation resistance based on the urging force F5 of the coil spring 5 is a force corresponding to the distance between the fixed end of the coil spring 5 opposite to the cam ring 4a and the virtual center KC1 (rotation center axis KZ1). It occurs in. That is, the force is generated according to the compression amount of the coil spring 5.
In the embodiment, since the virtual center KC1 (rotation center axis Z1) does not move, it is generated by a force corresponding to the distances L1 to L5 between the fixed end position of the coil spring 5 and each contact point.
FIG. 15 shows a graph of this rotational resistance based on the respective rotational positions 1 to 5.
In the graph of FIG. 15, the vertical axis indicates the rotation positions 1 to 5, and the horizontal axis indicates the rotation resistance. In the horizontal axis, the left side has a large rotational resistance.
As can be seen from FIG. 15, in the door rotation mechanism 51 of the embodiment, the rotation resistance becomes maximum at the position indicated by 3, and from that position toward the closed position indicated by 1 and the open position indicated by 5. The rotational resistance becomes small.
Accordingly, the user of the imaging device 50 can obtain a feeling that the door 2 is well guided to the open position and the closed position while feeling the rotational resistance when the door 2 is opened and closed. Can feel.

In the door rotation mechanism 51 of the embodiment, the contact point between the cam surface 4am and the outer surface 2f2 of the contact portion 2f moves between the point Q1 and the point Q5 with respect to the cam surface 4am. About 2f, it moves between the point P1 and the point P5. That is, the cam surface 4am and the contact portion 2f are in rolling contact with each other.
Therefore, the setting of the curve of the rotational resistance shown in FIG. 15 can be set including not only the cam surface 4am but also the outer peripheral surface 2f2 of the contact portion 2f. Therefore, it is possible to set the curve of the rotational resistance as a curve that has a higher degree of freedom and can cause a large change.

In the door rotation mechanism 51 of the embodiment, the urging direction (direction of arrow F5 in FIG. 10) of the coil spring 5 as urging means and the extending direction of the rotation center axis KZ1 are orthogonal to each other. .
This is because the cam surface 4am of the cam ring 4a is formed as a surface substantially orthogonal to the axis of the cam ring 4a, whereas the contact surface of the contact portion 2f that contacts and slides on the cam surface 4am is This is because the side surface of the contact portion 2f is substantially parallel to the rotation center axis KZ1 of the door 2.
Therefore, in the door rotation mechanism 51 of the embodiment, the cam rings 4a and 4b which are cam members, the coil springs 5 and 5 which are urging members, and the door 2 having a contact portion 2f which is a contact member are rotated. Since it is not arranged so as to be continuous in the direction of the central axis KZ1, the longitudinal dimension of the door rotating mechanism is short.

Moreover, since the screwing direction of the male screw 7 screwed in at the time of assembly becomes a direction orthogonal to the rotation center axis KZ1, the screwing direction of the male screw 7 driven in at both end portions of the door 2 can be made the same.
Therefore, the screwing operation of the male screw 7 becomes very easy, and the assembly efficiency of the door rotation mechanism 51 and the production efficiency of the imaging device 50 are improved.

The embodiment of the present invention is not limited to the configuration and procedure described above, and it goes without saying that modifications may be made without departing from the scope of the present invention.
The guide slit 6a6 may have a curved shape that is not an arc, and in that case, the door 2 can be moved along the curve of the guide slit without a substantial axis.
Specific examples of curved shapes that are not circular arcs that can be applied as the shape of the guide slit include a part of an ellipse, a part of an ellipse, and a part of a free curve.
Further, as the door 2 moves, the rotation center axis KZ1 may be set to move in parallel along a predetermined locus. The parallel movement may be performed continuously with the movement of the door 2, and the positions of a plurality of rotation center axes are set, and each rotation center axis does not move between the positions as the door 2 moves. You may make it continuously translate.

  Further, if the configuration in which the cam surface 4am and the contact portion 2f are in contact with each other is added to the configuration in which the rotation center axis KZ1 of the door 2 is moved along a predetermined locus, the setting of the rotation resistance is further enhanced. Furthermore, it becomes possible to set more freely.

The electronic devices of the embodiments are not limited to those described.
The present invention can be applied to any device provided with a door that opens and closes a part of the housing. Further, as an example of a part of the part, there is an operation unit (an operation button or a switch) or a connection terminal unit (a card slot, a connector, or the like) provided in the housing. Examples of applicable electronic devices include game machines, mobile phones, portable music playback devices, electronic dictionaries, disk recorders, drive recorders, television devices, sound playback devices, and personal computers.
The door rotation mechanism of the embodiment is not limited to that described.
In the embodiment, the configuration in which the ring cams 4a and 4b, the coil springs 5 and 5 and the contact portions 2f and 2f are provided at both ends of the door 2 to obtain a desired rotation resistance has been described, but these are arranged only at one end. It is also possible to provide only the guide mechanism for guiding the movement of the door 2 on the other end side.

1 (1A, 1B) Card slot 2 Door 2a, 2b Window portion 2c Projection portion 2d Projection base portion 2e End surface 2f Contact portion 2f1 Inner surface 2f2 Outer surface 3 Base 3a, 3b Opening portion 3c1, 3c2 Seat portion 3c3 Through hole 4a , 4b Cam ring 4a1 Protruding part 4a2 Peripheral wall part 4a3 Step part 4a4 Back face 4ac Cam part 4ak Base part 4am Cam surface 5 Coil spring 6a, 6b Guide cover 6a1 Boss 6a2 Bottomed hole 6a3 Arc-shaped rib 6a4 Notch 6a5 Wall part 6a6 Guide slit 7 Male thread 50 Imaging device (electronic equipment)
50A Lens unit 50B Main unit 50C Image monitor unit 50D Viewfinder 51 Door rotation mechanism TS Rolling contact surface

Claims (4)

A door having an engagement portion and a contact portion;
A guide portion that engages with the engaging portion and allows the door to move around a predetermined axis along a predetermined locus;
A cam having a cam surface with which the contact portion contacts;
A biasing member that biases the cam in a direction orthogonal to the extending direction of the predetermined axis so as to press the cam surface against the contact portion;
A door rotation mechanism with   2. The door rotation mechanism according to claim 1, wherein the contact portion has a rolling contact surface that rolls against the cam surface in response to the movement of the door along the predetermined locus.   The door rotation mechanism according to claim 1 or 2, wherein the predetermined axis is set to move in parallel with the movement of the door along the predetermined locus. A housing,
A door rotation mechanism according to any one of claims 1 to 3,
The door of the door rotation mechanism is
An electronic device, wherein the electronic device moves between a closed position where an operation portion or a connection terminal portion provided in the casing is hidden from the outside and an open position where the casing is exposed.

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