JP3066914B2 - Switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device which is used in an electronic device such as a facsimile and which opens and closes by rotating an opening / closing lid with respect to a housing body.

[0002]

2. Description of the Related Art In general, in this type of apparatus, a shaft and a bearing for opening and closing an opening / closing lid are provided as separate members for a housing body and an opening / closing lid, respectively, and attached after the housing body is substantially assembled. .

[0003] Such an opening / closing device requires an attaching process and is not easy to assemble. Therefore, the shaft and the bearing are formed integrally with the housing and the opening / closing lid, thereby eliminating the attaching process of the shaft and the bearing. There is.

In such an opening and closing device, a notch is provided on a bearing, and a chamfer as a short width portion is provided on the shaft so as to have an interval smaller than the interval between the notches, and a chamfer of the shaft is provided on the notch of the bearing. And the shaft and the bearing are fitted to each other.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an opening and closing device for opening and closing an opening and closing member with respect to a housing, wherein one of a shaft and a bearing for opening and closing the opening and closing member is provided. Is provided in the housing and the other is provided in the opening and closing member, the bearing has a notch, and the shaft has a short width portion with a narrower interval than the interval between the notches, and is detachable, A locking portion is provided on the opening / closing member, and a stopper made of an elastic member for locking the locking portion is provided on the housing, and the stopper and the locking portion have rigidity in the locking direction. Yes, it is configured to be deformed in a direction different from the locking direction, and when attaching the opening / closing member to the housing, the short width portion of the shaft matches the notch portion of the bearing and the shaft and Fit the bearing, front The stopper is elastically deformed by one-way rotation of the opening / closing member to move over the opening / closing member and attach the opening / closing member to the housing, and when the opening / closing member is opened, the locking portion engages with the stopper. The stopper is locked by utilizing the rigidity of the stopper so that the short width portion of the shaft does not coincide with the cutout portion of the bearing.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks and to provide an opening / closing device for preventing a shaft from coming off from a notch of a bearing without retrofitting a stopper. is there.

[0007]

According to the present invention, there is provided an opening / closing device for opening and closing an opening / closing member by rotating the opening / closing member with respect to a housing, wherein one of a shaft and a bearing for opening / closing the opening / closing member is provided. The other is provided on the opening / closing member while being provided in the housing, the bearing has a notch, and the shaft has a short width portion narrower than the gap between the notches, and is detachable. Is provided with a locking portion, and the housing is provided with a stopper for locking the locking portion, and the stopper and the locking portion have rigidity in the locking direction and lock. The opening / closing member is configured to be deformed in a direction different from the direction, and the opening / closing member is attached to the housing using the deformation, and the locking portion is engaged with the stopper when the opening / closing member is opened using rigidity. Will be stopped

[0008]

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

FIG. 1 shows a facsimile apparatus.
Reference numeral denotes an upper document table of a document transport section, in which a document is inserted and transported in the direction of arrow A in the figure.
2 is an outer cover, and 3 is a main body frame. The main body frame 3 may be formed integrally with the outer cover 2. A recording cover 4 is opened and closed for loading and repairing the recording paper 5.

The upper platen 1 is opened when a document is jammed inside. The upper platen 1 is opened and closed about one end of a support lever 6 as a rotation center. Is done.

The specific structure of the rotating portion when the upper document table 1 is opened and closed will be described with reference to FIGS.
1 shows the upper platen 1 in the state A in FIG. 1, FIG. 3 shows the state B, and FIG. 4 shows the state C.

Reference numeral 6a denotes a shaft. The shaft 6a is formed integrally with the support lever 6, or is integrally fixed with screws or the like. The shaft 6a forms a chamfered portion 6a _1, 6a ₂ as a short-width portion is chamfered (2-way-up) to form a facing surface.

The support lever 6 has a locking portion 6b for suppressing the rotation range of the upper platen 1 protruding from one end.

Reference numeral 7 denotes a bearing, which is formed integrally with the main body frame 3 or fixed with screws or the like. This is the bearing 7 is provided notch 7a, spacing of the notch 7a is made slightly larger than the interval of the chamfer 6a _1, 6a ₂ of the shaft 6a. It has become removable from the radial direction when the chamfered portion 6a ₁ of the shaft 6a, 6a ₂ met the notch 7a as shown in FIG. 2. Reference numeral 8 denotes a stopper for locking the locking portion 6b of the support lever 6. The stopper 8 is composed of a plate-like elastic body 8a and an abutting member 8b fixed thereto, and one end of the elastic body 8a is screwed. It is fixed to the main body frame 3. The elastic body 8a and the abutting member 8b may be integrated, or may be formed integrally with the main body frame 3.

The end surface of the abutting member 8b and the end surface of the engaging portion 6b abutting as shown in FIG. 3 are formed on a surface extending in a radial direction of a shaft 6a serving as a rotation center of the upper document table 1. .

When the upper document table 1 is rotated clockwise from the state C in FIG. 1, the end surface of the abutting member that comes into contact with the inclined surface of the locking portion 6b has a tapered shape. Since the stopper 8 is arranged along with the elastic body 8a in the tangential direction of the circle which is the locus of the locking portion 6b which operates about the shaft 6a as a center of rotation, the stopper 8 easily moves in the radial direction, that is, in the direction perpendicular to the tangential direction. It is operable, and after the operation, a force to return to the original position is exerted by its own elastic force.

Next, the operation of the above configuration will be described.

In the final stage of assembly, the upper document table 1 is assembled to the main body frame 3. Therefore, the shaft 6
The shaft 6a is inserted into the bearing 7 from above so that the chamfered portions 6a ₁ , 6a _{2 of} FIG. It is fitted to the bearing 7. The state at this time is shown in FIG.
The upper platen 1 is shown in a state C in FIG.

When the upper platen 1 is rotated clockwise from the C state, the chamfers 6a ₁ and 6a _{2 of} the shaft 6a and the notch 7a of the bearing 7 do not coincide with each other. It is not possible to get out of the notch 7a and move only in the rotation direction.

When the upper platen 1 is further rotated, the slope of the locking portion 6b of the support lever 6 comes into contact with the taper of the abutting portion 8b of the stopper 8, and when the upper platen 1 continues to rotate, The locking portion 6b pushes the taper of the butting portion 8b of the stopper 8. At this time, a downward component force is generated in the stopper 8 due to the slope, and the tip portion is deformed downward. And finally, the locking portion 6b is abutting portion 8b of the stopper 8.
Get over. FIG. 3 shows this state, and FIG. 1 shows the upper platen 1 in the B state. When the upper platen 1 is further rotated clockwise, the upper platen 1 is finally closed, as shown in the state A in FIG. 1, and the shaft 6a and the bearing 7 are as shown in FIG. . The A state of the upper document table 1 is a state in which a document is inserted in the direction of arrow A, the document is transported by the document transport unit, and the document is read.

Next, in order to release the upper platen 1 from the closed state of the state A, the upper platen 1 is rotated counterclockwise.
When the upper document table 1 is rotated to the position of the state B, the end face of the locking portion 6b of the support lever 6 comes into contact with the end face of the butting portion 8b of the stopper 8. Further, even if the upper document table 1 is to be rotated in the counterclockwise direction, the contact between the end surface of the locking portion 6b and the end surface of the abutting portion 8b is in the radial direction, so that the stopper 8 is easily deformed in the vertical direction. There is almost no component force (substantially radial direction). For this reason, the butting portion 8b of the stopper 8 receives the locking portion 6b without being deformed,
Further rotation of the upper document table 1 is prevented. Therefore, the open state of the upper platen 1 is the state B in FIG.
The relationship between the shaft 6a and the bearing 7 is as shown in FIG.

Since the upper platen 1 does not rotate any more, the chamfers 6a ₁ and 6a _{2 of} the shaft 6a and the notch 7a of the bearing 7 coincide with each other when the upper platen 1 is opened. The shaft 6a does not come out of the bearing 7 because there is no need to do this.

To remove the upper platen 1 from the main body frame 3 for repair or the like, the upper platen 1 is opened, the stopper 8 is pushed down, and the upper platen 1 is further turned counterclockwise. When moved, the chamfers 6a ₁ and 6a _{2 of} the shaft a
Can be removed from the main body frame 2 by removing the shaft 6a from the bearing 7 in accordance with the notch 7a of the bearing 7.

FIG. 5 shows a modification of the stopper 8, in which a simple, straight spring material is used for the stopper 8 to achieve exactly the same effects as in the above embodiment. As the role of the stopper 8, it is the plate end that comes into contact with the locking portion 6b, and the side that acts to escape when assembled is the side surface. In this case, if there is no friction, the force for moving the stopper in the left-right direction is not transmitted, and only the downward force acts. Therefore, the upper platen 19 can be operated with a relatively light force, which is convenient. .

When the end of the plate is pressed as a stopper, there is a portion fixed to the main body frame 3 substantially in the direction of extension of the force, so that little moment occurs in the direction in which the plate is bent. Therefore, it can be configured with a relatively weak spring, and the force against the force for rotating the upper document table 1 one time is large.

FIG. 6 shows still another modification of the stopper 8, which is configured by using a spring 9 for the stopper 8. As shown in FIG. The stopper 8 is fixed to the main body frame 3 so as to be rotatable only by a vertical force, and is pressed upward from below by a spring. When the upper platen 1 is in the A or B state, the upper platen 1 contacts the R-shaped portion near the rotation center axis of the upper platen 1 and does not further rotate upward.

In the above embodiment, the stopper 8 is elastically deformed. However, the present invention is not limited to this, and the stopper 6b may be elastically deformed as shown in FIG. It can be implemented.

[0028]

As described above in detail, according to the present invention, in an opening and closing device for opening and closing an opening and closing member with respect to a housing, one of a shaft and a bearing for opening and closing the opening and closing member is provided in the housing. The other is provided in the body and the other is provided in the opening and closing member, the bearing has a notch, and the shaft has a short width portion with a narrower interval than the interval of the notch, and is detachable. Is provided with a locking portion, and a stopper made of an elastic member for locking the locking portion is provided on the housing, and the stopper and the locking portion have rigidity in the locking direction. It is configured to be deformed in a direction different from the stopping direction, and when attaching the opening / closing member to the housing, align the short width portion of the shaft with the cutout portion of the bearing so that the shaft and the bearing are aligned. Mating, turning the opening and closing member in one direction The stopper is elastically deformed so that the opening / closing member is moved over the opening / closing member, and the opening / closing member is attached to the housing. When the opening / closing member is opened, the locking portion engages with the stopper by utilizing the rigidity of the stopper. In order to prevent the short width portion of the shaft from being aligned with the cutout portion of the bearing, a stopper can be provided at the same time as the opening and closing member is attached to the housing, so that the number of assembling steps can be reduced and the bearing cutout portion can be reduced. An opening and closing device that prevents the shaft from coming off can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a facsimile using an opening and closing device according to an embodiment of the present invention.

FIG. 2 is a detailed view of the rotating unit of FIG. 1 when the upper document table is in an A state.

FIG. 3 is a detailed view of the rotating unit of FIG. 1 when the upper document table is in a state B.

FIG. 4 is a detailed view of the rotating unit of FIG. 1 when the upper document table is in a C state.

FIG. 5 is a view showing a modification of the stopper shown in FIG. 3;

FIG. 6 is a view showing another modified example of the stopper shown in FIG. 3;

FIG. 7 is a view showing a modification of FIG. 5 when the locking portion is elastically deformed.

[Explanation of symbols]

1 on the document table 3 the main body frame 6 supporting lever 6a shaft 6a _1, 6a ₂ chamfered portion 6b engaging portion 7 bearing 7b notch 8 a stop 9 spring

Claims (1)

(57) [Claims] 1. An opening and closing device for opening and closing an opening and closing member with respect to a housing, wherein one of a shaft and a bearing for opening and closing the opening and closing member is provided in the housing and the other is provided in the opening and closing member. The bearing has a notch, and the shaft has a short width portion with a narrower interval than the interval of the notch, and is detachable, and the opening and closing member is provided with a locking portion, and the housing has A stopper made of an elastic member for locking the locking portion is provided, and the stopper and the locking portion are rigid in a locking direction and deform in a direction different from the locking direction. When attaching the opening / closing member to the housing, the short width portion of the shaft is matched with the notch of the bearing, the shaft and the bearing are fitted, and the opening / closing member is rotated in one direction. The stopper is elastically deformed by movement The opening / closing member is moved over the opening / closing member, and the opening / closing member is attached to the housing. When the opening / closing member is opened, the locking portion is locked to the stopper by using the rigidity of the stopper, and the notch portion of the bearing is An opening / closing device, wherein the short width portions of the shaft do not match.