JP2690237B2 - Fall prevention mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for preventing a box-shaped housing that is portable and stable when placed horizontally from being collapsed when the housing is placed vertically, and more particularly to a personal computer. , A fall prevention mechanism for portable electronic devices such as word processors.

[0002]

2. Description of the Related Art As shown in FIG. 11, a conventional tilt-prevention mechanism vertically inserts a bottom portion of an electronic device 50 into an engaging portion 52 provided at the center of an upper surface of a stable vertical mounting base 51 so that the electronic device 50 can be vertically supported. It was something to put.

Alternatively, as shown in FIG. 12, an electronic device 53
The arm 54 rotatably provided on the bottom surface of the electronic device 5
When the electronic device 53 is placed vertically on both sides of the electronic device 53, and when the electronic device 53 is placed horizontally or is transported, the arm 54 is manually rotated to match the bottom surface of the electronic device 53. It was something to do.

[0004]

The conventional tilt-preventing mechanism shown in FIG. 11 requires a dedicated vertical mount 51 in addition to the main body of the apparatus, which is complicated in terms of management of individual parts. Further, the conventional fall prevention mechanism shown in FIG.
There is a problem that the portable function of the electronic device is hindered because the work of manually changing the mounting direction of is required.

[0005]

A fall prevention mechanism of the present invention comprises a fall prevention arm rotatably attached to a bottom surface of a housing and vertically movable within a certain range, and a bottom prevention surface of the housing within a certain range. A leg that is vertically movable, a lever that vertically moves the fall prevention arm and the leg in opposite directions, and a first spring that biases the fall prevention arm upward and the leg downward. A second spring for urging the fall prevention arm in a predetermined rotation direction and the second fall prevention arm in a state of being moved upward so as not to rotate the fall prevention arm in the predetermined rotation direction. And an engaging portion to be stored under the bottom surface of the housing, and when the housing is placed with the bottom surface down, the legs move upward with respect to the housing due to gravity and the fall prevention is performed. The arm moves down Wherein it is released from Kigakarigo unit first
It is characterized in that the both ends are rotated in the rotation direction of and the both ends are projected outward from the side surface of the housing.

The fall prevention mechanism of the present invention has a handle attached to the housing so that it can move up and down within a certain range, a slide bar which moves up and down in conjunction with the handle, and one end of which is fixed to the central axis of rotation. When the slide bar moves upward and the fall prevention arm is housed under the bottom surface of the housing, the other end abuts on the slide bar so that the fall prevention arm does not rotate in a predetermined rotation direction. In the state where the slide bar is moved downward, there is provided a leaf spring which can freely rotate the fall prevention arm through a slit provided in the slide bar.

In the fall prevention mechanism of the present invention, the leaf spring has a curved portion and elastically deforms to escape the slide bar when the fall prevention arm rotates in the direction opposite to the predetermined rotation direction.

[0008]

Next, the present invention will be described with reference to the drawings.

1 and 2 are perspective views showing an embodiment of the present invention, in which an electronic device 1 is placed vertically and horizontally, respectively. Legs 3 are provided at the four corners of the bottom surface of the housing 1a of the electronic device 1, and tilting prevention arms 4 that rotate around the center are provided at the bottom surface of the housing 1a. Further, the handle 2 provided on the upper end of the electronic device 1 can move up and down within a certain range in the state of FIG. 1, and when it is placed vertically as shown in FIG. 1, until it contacts the upper surface of the housing 1a by its own weight. When it is pulled out, a space is formed between the upper surface of the housing 1a and the upper surface of the housing 1a so that a hand can be put into it when it is pulled out.

3 to 5 are vertical cross-sectional views of the bottom of the electronic period 1, showing a state in which the electronic device 1 is lifted by the handle 2, respectively, while the electronic device 1 is pulled out by the handle 2. 1 is a diagram showing a state in which 1 is placed on a desk or the like, and a state in which an electronic device 1 is left vertically placed on a desk or the like and a hand is also released from a handle 2. 6 is a sectional view taken along the line AA of FIG. 3, FIG. 7 is a sectional view taken along the line DD of FIG. 5, FIG. 8 is a sectional view taken along the line BB of FIG. 3, and FIG. 9 is a sectional view taken along the line EE of FIG.

The arm 4 is fixed to a rotation center shaft 4a rotatably and vertically movable at the center of the bottom surface of the electronic device 1 to rotate, and is rotated counterclockwise by a spring 8 when viewed from the direction of arrow c in FIG. It is urged to rotate in the direction and is urged upward by the spring 9. The leg 3 is attached to the housing 1a of the electronic device 1 so as to be vertically movable within a certain range, and is biased downward by a spring 7. One end is connected to the leg 3 and the other end is connected to the rotation center shaft 4a, and the intermediate point fulcrum 10a is brought into contact with the inner surface of the housing 1a of the electronic device 1 by the lever 10 to vertically move the leg 3 and the arm 4 in opposite directions. I do. The slide bar 6 attached to the housing 1a so as to be movable up and down at a portion not shown is connected to the handle 2 at a portion not shown and moves up and down together with the handle 22.

When the electronic device 1 is lifted by the handle 2 or the electronic device 1 is placed horizontally, the legs 3 move downward and the fall prevention arm 4 moves upward as shown in FIG. Also, the convex portion 4b is urged by the spring 8 so that the convex portion 4b is brought into contact with the convex portion 1b provided on the casing 1a (see FIG. 8) with respect to the rotation direction, and the lower side of the bottom surface of the casing 1a as shown in FIG. It is located in the state of being housed in.

Next, when the electronic device 1 is placed vertically on a desk or the like but the handle 2 is held by hand and pulled out from the upper surface of the housing 1a, the legs 3 are the weight of the electronic device 1 as shown in FIG. The upper surface 3a of the flange provided on the receiving lower end is moved upward until it abuts the bottom surface 1c of the boss provided on the housing 1a. The arm 4 receives the upward movement of the leg 3 via the lever 10.
Moves downward, and the convex portion 4b does not contact the convex portion 1b. However, since the other end of the leaf spring 5 whose one end is fixed to the rotation center shaft 4d is in contact with the slide bar 6 (see FIG. 6), the arm 4 does not rotate even if it is urged by the spring 8 Keep the state as shown in 2.

Further, in a state where the electronic device is placed vertically and the handle 2 is lowered from the hand and brought into contact with the upper surface of the housing 1a, the slide bar 6 is lowered and slid together with the handle 2 as shown in FIG. Since the slit 6a provided in the bar 6 is at the same height as the leaf spring 5, the leaf spring 5 does not abut the slide bar 6 and can freely rotate (see FIG. 7).
1), the arm 4 rotates 90 ° counterclockwise as viewed from the direction of the arrow c by the force of the spring 8, and both ends project from the front and back surfaces of the electronic device 1 as shown in FIG. Prevent fall.

To move the arm 4 shown in FIG. 5 from the front and rear surfaces of the electronic device 1 to the state in which it is housed under the bottom surface of the housing 1a, the electronic device 1 is placed vertically on a desk or the like, and the arm 4 is held. 4 is rotated by 90 ° clockwise as viewed from the arrow c, and then the electronic device 1 is lifted. By this operation, the leg 3 moves downward, the arm 4 moves upward, and the convex portion 4b comes into contact with the convex portion 1b, and the arm 4 is held in a state of being accommodated under the bottom surface of the housing 1a.

When the handle 2 is pulled out from the upper surface of the housing 1a and the heights of the leaf spring 5 and the slit 6a do not match, the leaf spring 5 and the leaf spring 5 are rotated when the arm 4 is rotated counterclockwise as viewed from the arrow c. Even if the slide bar comes into contact, the leaf spring 5
Due to the elastic deformation of the curved portion 5a provided in the plate spring 5, the leaf spring 5 escapes from the slide bar 6 so that the rotation of the arm 4 is not hindered.

Also, after lifting the electronic device, the arm 4
In order to make the state of being housed in the lower side of the bottom surface of the housing 1a by rotating, the leg 3 is moved downward and the arm 4 is moved upward so that the convex portion 1b interferes with the convex portion 4b. Although the arm 4 cannot be rotated, it is possible if the arm 4 is rotated by pulling the arm 4 by hand and moving the arm 4 in the clockwise direction when viewed from the direction of the arrow c.

FIG. 10 shows an EE sectional view of another embodiment of the present invention. 1 to 9 except that the arm 4 is biased by the spring 8 and the slope 4c is provided on the side of the protrusion 4b opposite to the side where the protrusion 4b abuts the protrusion 1b of the housing 1a. Same as the example. In the present embodiment, even when the electronic device 1 is lifted and then the arm 4 is rotated to be housed under the bottom surface of the housing 1a, the arm 4 rotates when the convex portion 1b hits the slope 4c. Accordingly, the slope 4c receives a downward force from the convex portion 1b, the arm 4 moves downward, and the convex portion 1b slides on the slope 4c, so that the arm 4 does not have to be pulled downward by hand. The arm 4 can be rotated clockwise as viewed from the arrow c only by applying a force in the rotation direction.

[0019]

As described above, according to the present invention, the tilt-preventing arm housed under the bottom surface of the housing is automatically rotated when the housing is placed on a machine image or the like when the housing is lifted. By extending both ends of the fall prevention arm to the outside of the side surface of the housing, it is possible to prevent the fall of the housing placed on the desk etc. without the need to rotate the fall prevention arm by hand. There is an effect that can be done.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electronic device 1 according to an embodiment of the present invention in a vertically placed state.

FIG. 2 is a perspective view of the electronic device 1 placed horizontally.

FIG. 3 is a vertical cross-sectional view of the bottom portion of the electronic device 1 that has been lifted.

FIG. 4 is a vertical cross-sectional view of the bottom portion of the electronic device 1 in a state in which the handle 2 is pulled out on a desk or the like.

FIG. 5 is a vertical cross-sectional view of the bottom of the electronic device 1 in a state where the huddle 2 is lowered by placing it on a desk or the like.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is a DD cross-sectional view of FIG.

8 is a cross-sectional view taken along the line BB of FIG.

9 is a sectional view taken along the line EE in FIG.

10 is a sectional view taken along the line EE in FIG. 8 according to another embodiment of the present invention.

FIG. 11 is a perspective view showing a conventional fall prevention mechanism of an electronic device.

FIG. 12 is a perspective view showing another conventional tilting prevention mechanism for an electronic device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic device 1a Housing 1b Convex part 2 Handle 3 Leg 4 Tilt prevention arm 4a Rotation center axis 4b Convex part 4c Slope 5 Leaf spring 5a Curved part 6 Slide bar 6a Slit 10 Lever

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-27193 (JP, A) Actually opened 63-67283 (JP, U) Actually opened 62-177083 (JP, U) Actually opened 62- 168682 (JP, U)

Claims (5)

(57) [Claims] 1. A fall prevention arm rotatably attached to a bottom surface of a housing and vertically movable within a certain range, a leg attached to a bottom surface of the housing movably up and down within a certain range, and the tilt. A lever for vertically moving the prevention arm and the leg in mutually opposite directions, a first spring for urging the fall prevention arm upward and the leg downward, and a fall prevention arm in a predetermined rotation direction. A second spring for urging,
An engaging portion for abutting against the fall prevention arm in a state of being moved upward and storing the fall prevention arm on the lower side of the bottom surface of the housing so as not to rotate in the predetermined rotation direction, When the casing is placed with the bottom face down, gravity causes the legs to move upward with respect to the casing, and the fall-prevention arms move downward to be released from the engaging portion to release the first rotation direction. A tilt-prevention mechanism characterized by rotating both ends to project both ends to the outside of the side surface of the housing. 2. A handle attached to the housing so as to be movable up and down within a certain range, a slide bar which moves up and down in association with the handle, and one end of which is fixed to a rotation center shaft so that the slide bar moves upward. When the fall prevention arm is housed under the bottom surface of the housing, the other end contacts the slide bar so that the fall prevention arm does not rotate in a predetermined rotation direction and the slide bar moves downward. The fall prevention mechanism according to claim 1, further comprising: a leaf spring that allows the fall prevention arm to freely rotate by passing through a slit provided in the slide bar in a state of being moved to. 3. The fall prevention mechanism according to claim 2, wherein the leaf spring has a curved portion and elastically deforms to escape the slide bar when the fall prevention arm rotates in a direction opposite to a predetermined rotation direction. 4. The fall-prevention mechanism according to claim 1, wherein the engagement portion comprises a second convex portion provided on the housing that abuts a first convex portion provided on the fall prevention arm. 5. A sloped surface is provided on the first convex portion, and when the tilt-preventing arm rotates in a direction opposite to a predetermined rotation direction, the second convex portion slides on the sloped surface and the first and the first convex portions are slidable. The falling prevention mechanism according to claim 4, wherein the two convex portions do not engage with each other.