JPH04258481A - Shutter - Google Patents

Abstract

PURPOSE:To permit forces applying to each part to be relieved by using a device having a holder with a slide face crossing the axis of opening and closing when opening or closing a cover by turning it in relation to the body and a coupler to hold the cover open. CONSTITUTION:A flange part 5 as a holder for the shutter mechanism of a cover in relation to the device body 2 is provided on the side end of the cover 4. A hole 2b through which a coupler holding the opening condition of the cover 4 in contact with the lower end 5a of the flange part 5 is allowed to go into the body 2 is formed in the side plate 2a of the body 2. The coupler is pushed by a leaf spring 8 fixed to the body 2 by screw 12. A projection 5b is also formed on the lower end of the flange 5 and contacted with the tip of a screw 10 projected to the inside of the side plate 2a, whereby permitting the max. opening amount of the cover 4 to be regulated. Also, a hole through which the coupler is allowed to escape when the cover 4 is closed is formed in the flange 5.

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 for opening and closing a lid by rotating it relative to a main body and for holding the lid in an open state.

0002

[Prior Art] In office equipment such as facsimile machines, printers, and copying machines, a lid is provided on the main body of the equipment for purposes such as replacing recording paper and cleaning the inside. A retention mechanism is often used to hold the body in an open position. Conventionally, this type of holding mechanism uses torsion bars, tension springs,
Or one that utilizes the slipping torque of a spring clutch,
Alternatively, there are some that utilize deformation of a resin stopper.

0003

[Problems to be Solved by the Invention] However, in the above-mentioned conventional example, for example, when using a torsion bar or a tension spring, a large force is applied to the fulcrum part when opening and closing the lid, so it is difficult to maintain the strength of this fulcrum part. As a result, the thickness of the fulcrum part is increased, which leads to an increase in the size of the device.In addition, devices that utilize the slipping torque of a spring clutch take up space in the axial direction of the fulcrum, which also increases the size of the device. There was a problem in that it invited Further, in the case where the deformation of the resin stopper is used, there are problems in terms of strength as well as poor assemblability.

[0004] Therefore, the present invention has been made in view of the above-mentioned problems, and its purpose is to reduce the force acting on each part, and to provide a small opening/closing device that is easy to assemble. be.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems and achieve the objects, the opening/closing device of the present invention opens and closes the lid body by rotating it with respect to the main body. An opening/closing device for holding a lid in an open state, the holding body being integrally provided with the lid and having a sliding surface substantially orthogonal to the opening/closing axis of the lid; and the main body. provided so as to be swingable in the direction of movement of the sliding surface,
A position in which the lid body is held in an open state by slidingly contacting the sliding surface, and a position in which the lid body is in sliding contact with the sliding surface, and a retraction position in which the sliding contact is released and the lid body is in contact with the bottom of the holding body. The present invention is characterized in that it includes a locking member that is moved to the retracted position, and a biasing means that biases the locking member toward the retracted position.

Further, in the opening/closing device according to the present invention, the holding body has a relief portion for allowing the locking member to escape when the lid body is in the closed state. Further, in the opening/closing device according to the present invention, the biasing means is a biasing means using a leaf spring.

[0007] Furthermore, in the opening/closing device according to the present invention, the lid body opens at a predetermined opening angle with respect to the main body.
The lid is removably attached to the main body, and the main body is characterized by having a removable stopper that prevents the lid from opening to the predetermined angle.

[0008]

[Operation] Since the opening/closing device according to the present invention is constructed as described above, it is possible to reduce the force acting on each part and realize a small opening/closing device that is easy to assemble.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. First, FIG. 1 shows a partial side view of a recording section of a facsimile device to which an opening/closing device of one embodiment is applied.

In FIG. 1, a main body 2 is provided with a recording paper transport mechanism (not shown), and also houses a roll of recording paper wound into a cylindrical shape. The lid body 4 is attached to the side plate 2a of the main body 2 (in the figure, on the near side with respect to the page)
The lid 4 is inserted into the hole 2c formed in the upper part of the side plate on the opposite side.
It is rotatably supported by fitting the convex portion 4a provided thereon, and is attached to the main body 2 so as to be openable and closable in the direction of the arrow.

A thermal head (not shown) is attached to the lid 4 for recording characters and images on recording paper. In this recording section, when the lid body 4 is closed, the thermal head is pressed against the recording paper, and the recording paper is moved relative to the thermal head by a transport mechanism (not shown). It records characters or images on recording paper.

In the recording section of the facsimile machine constructed in this manner, the lid 4 is held open relative to the main body 2 of the apparatus in order to facilitate the replenishment of rolls of recording paper. A mechanism is required. For this purpose, the side end of the lid 4 (on the near side in FIG. 1) has a flange that extends vertically downward with respect to the top plate, which becomes the external appearance of the top surface of the device when the lid 4 is closed. The member 5 is integrally
Or, it is provided separately. A substantially rectangular locking member 6 that abuts the lower end 5a of the flange member 5 of the lid 4 to hold the lid 4 in an open state is attached to the side plate 2a of the main body 2, and is inserted into the inside of the main body 2. A hole 2b is formed for this purpose. The locking member 6 is inserted into the main body 2 through the hole 2b of the side plate 2a, and its rear end is fixed to the main body 2 with a screw 12, using a leaf spring 8 made of spring rope or highly elastic plastic. It is pressed down and urged in a direction perpendicular to the plane of the paper.

Further, a convex portion 5b is formed at the tip of the lower end of the flange member 5, and this convex portion 5b is connected to the main body 2.
The maximum opening amount of the lid 4 is determined by screwing the screw 10 into the side plate 2a and abutting the tip of the screw 10 with the tip of the screw 10 protruding inside the side plate 2a. Furthermore, the flange member 5 includes
A hole 5c (see FIG. 3-1) is formed through which the locking member 6 escapes when the lid 4 is closed.

Next, FIGS. 2(a) to 2(d) show sectional views taken along line XX in FIG. 1. In FIG. 2(a), the main body 2 is formed with a groove 2c that opens upward for the flange member 5 of the lid 4 to enter, and the inner wall 2d of the groove 2c allows the flange member 5 to Guided by the middle left side. On the other hand, as described above, the locking member 6 is inserted into the main body 2 through the hole 2b formed in the side plate 2a of the main body 2, and the locking member 6
The vertical width of the hole portion 2b is slightly smaller than the vertical width of the hole portion 2b. Therefore, the locking member 6 is
As shown in b), it is possible to swing vertically with respect to the side plate 2. A flange portion 6a is formed on the locking member 6, and this flange portion 6a is connected to the side plate 2a.
The amount of protrusion of the locking member 6 into the main body 2 is determined by contacting the outer wall surface of the locking member 6 . The locking member 6 is
As described above, the rear end portion 6b is urged against the side plate 2a by the leaf spring 8 fixed to the side plate 2a, and is held in the state shown in the figure.

Furthermore, a locking surface 6c is formed at the tip of the locking member 6, and the locking surface 6c abuts against the lower end 5a of the flange member 5, as shown in FIG. 2(a). The flange member 5 is locked to hold the lid 4 in an open state with respect to the main body 2. Further, a slope 6d is formed on the lower side of the locking surface 6c, and the locking member 6d is formed on the lower side of the locking surface 6c.
is arranged so that it escapes toward the outside of the main body 2.

Next, the opening/closing operation of the lid 4 with respect to the main body 2 will be explained with reference to FIGS. 2(a) to 2(d). First, when the lid 4 held in the open state in FIG. 2(a) is manually pushed down, a counterclockwise moment acts on the locking member 6, and accordingly , as shown in FIG. 2(b), while tilting in the counterclockwise direction, it moves outward of the side plate 2a against the biasing force of the leaf spring 8. Therefore, the flange member 5 becomes movable downward, and the lid body 4 is closed with respect to the main body 2 to be in the closed state shown in FIG. 2(c). During the process of closing the lid body 4, the flange member 5 is held by the plate spring 8.
Since the lid body 4 is pressed while being sandwiched between the locking member 6 and the inner wall 2d of the groove portion 2c, an appropriate frictional force acts on the lid body 4 during its opening/closing operation.

Furthermore, when the lid body 4 is in the closed state, that is, when the recording section is in operation, there is a position corresponding to the locking member 6.
Since the hole 5c of the flange member 5 mentioned above is located,
The pressing force of the leaf spring 8 does not act on the flange member 5, so that deformation of the flange member 5, sagging of the leaf spring 8, etc. can be prevented. Normally, the lid body 4 is left in the closed state, and especially when the flange member 5 and leaf spring 8 are made of plastic, if left under force for a long time, it may creep. Therefore, it is important to prevent excessive force from being applied when the lid body 4 is in the closed state.

Next, when opening the lid 4 from the state shown in FIG. 2(c), manually pull the lid 4 upward.
The lower end of the hole 5c of the flange member 5 comes into contact with the slope 6d of the locking member 6, and the locking member 6 is pushed outward as shown in FIG. 2(d). Then, when the lid 4 is further pulled up, the state shown in FIG. 2(a) is obtained, and the lid 4 is held in the open state. At this time, when the lid 4 is pulled up further than the state shown in FIG. It seems that there is no such thing.

Next, the assembly procedure of the opening/closing device of one embodiment will be explained with reference to FIG. 2(a) and FIGS. 3-1 to 3-3, which are partially enlarged views of FIG. 1. First, Figure 2 (
In a), the locking member 6 is inserted into the hole 2 of the side plate 2a of the main body 2.
b, and in that state, fix the leaf spring 8 to the side plate 2a with screws 12. After this, the lid 4 is attached to the main body 2.

Here, the hole 2c is formed in the side plate 2a and the opposite side plate of the main body 2 as described above, and the hole 2c is formed as shown in FIG. 3-1. , a portion of its upper end is open, forming an open portion 2d. On the other hand, the lid 4 has a convex portion 4 that fits into the hole 2c.
As shown in the figure, the convex portion 4a has a cross-sectional shape similar to that of a cylinder with both sides cut off (two-sided pattern). The width of the open portion 2d is slightly larger than the width of the opposing linear portions of the cross section of the convex portion 4a, so when the open portion 2d and the straight line portions of the convex portion 4a match, the lid body The convex portion 4a of No. 4 is opened at the open portion 2d.
It can be inserted into the hole 2c from the inside. Figure 3-2 shows this state.

From this state, by rotating the lid 4 in the direction of the arrow, the lid 4 is rotationally supported without coming off the side plate 2a. Then, when the lid body 4 is further rotated in the direction of the arrow, a state as shown in FIG. 3-3 is obtained. The position of the lid 4 corresponds to that shown in FIG. 2(a). At this position, by attaching the screw 10 to the side plate 2a from the outside of the side plate 2a, the convex portion 5b at the lower end of the flange member 5 is restricted from moving in the opening/closing direction by the tip of the screw 10, and the lid body 4 is , will be held so that it can be opened and closed within a limited range relative to the main body 2. Then, by manual opening/closing operation, FIGS. 2(a) to 2(
As shown in d), the lid body 4 is held in an open state and a closed state with respect to the main body 2.

As explained above, according to one embodiment, since the rotational direction of the flange member 5 is only held down by the locking member 6, no force is applied to the fulcrum for opening and closing the lid body 4. Since the hole 2c and the convex portion 4a do not require much strength, there is no need to increase the thickness of these parts, making it possible to downsize the device. Further, since the locking member 6 is held down by the leaf spring 8, the space in which these members are arranged can be made thinner, and the device can be made smaller.

Furthermore, the locking member 6 is inserted into the hole 2b of the side plate 2a.
Assembling is completed by simply inserting the plate spring 8 into the holder and fixing the leaf spring 8 from above with a screw.Assembling the lid 4 is also completed by simply inserting the convex portion 4a from above the side plate 2a, rotating it, and tightening the screw 10. do. In other words, just by fastening two screws, the lid body 4 and
It is possible to assemble the main body 2 and the holding device,
Assembly efficiency is greatly improved.

The present invention can be applied to modifications or variations of the above embodiments without departing from the spirit thereof. For example, in the above embodiment, an example was explained in which the application was applied to a facsimile machine, but the present invention is applicable to any device in which a lid body is attached to the main body so as to be openable and closable.
It doesn't matter what you apply it to.

[0025]

As explained above, according to the opening/closing device of the present invention, the force acting on each part is reduced, and the opening/closing device is small and easy to assemble.

[Brief explanation of the drawing]

FIG. 1 is a partial side view of a recording section of a facsimile device to which an opening/closing device of one embodiment is applied.

FIG. 2 is a sectional view taken along line XX in FIG. 1;

FIG. 3-1 is a partially enlarged view of FIG. 1;

FIG. 3-2 is a partially enlarged view of FIG. 1;

FIG. 3-3 is a partially enlarged view of FIG. 1;

[Explanation of symbols] 2 Main body 4 Lid body 5 Flange member 6 Locking member 8. Leaf spring

Claims (4)

[Claims] 1. An opening/closing device that opens and closes a lid by rotating it relative to a main body and holds the lid in an open state, the opening and closing device being integrally provided with the lid. , a holder having a sliding surface substantially orthogonal to the opening/closing axis of the lid, and a holder that is swingably provided in the movement direction of the sliding surface with respect to the main body, and that is in sliding contact with the sliding surface. and a locking mechanism that holds the lid in an open state and sets the position where it slides against the sliding surface and the retracted position where the sliding contact is released and the lid comes into contact with the bottom of the holder. parts and
An opening/closing device comprising: urging means for urging the locking member toward the retracted position. 2. The opening/closing device according to claim 1, wherein the holding body has a relief portion for allowing the locking member to escape when the lid body is in a closed state. 3. The opening/closing device according to claim 1, wherein the biasing means is a biasing means using a leaf spring. 4. The lid is removable from the main body at a predetermined opening angle with respect to the main body, and the main body has a removable stopper that prevents the lid from opening to the predetermined angle. The opening/closing device according to claim 1, characterized in that: