JPS58127953A - Holder for platen cover of copying machine - Google Patents

Abstract

PURPOSE:To hold a platen cover easily and surely while the cover is open by forming projecting parts which can be engaged and disengaged mutually when the platen cover is opened to the platen cover and a cover supporting part. CONSTITUTION:An arced notch 4 centering at a shaft 7 is formed in a cover detaining part 3 of a copying machine, and a sloped surface 5 that can be brought into contact with the root part 9 of a platen cover 8 so as not to oscillate at the angle larger than the opening angle of the platen cover when the cover is open is provided in front of said notch. A protrusion 6 is provided in one body to the notch 4. A projection 10 is provided in one body to said root part 9, and the distance r2 from the center of said shaft 7 up to the preceding end of the protrusion 10 is set slightly longer than the distance r1 from the center of the shaft 7 up to the preceding end of the protrusion 6. According to the above-mentioned constitution, the platen cover is held easily and surely while the cover is open.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device capable of holding the platen cover in an open state when the platen cover is opened in a copying machine equipped with a highly rigid platen cover. .

Conventionally, in order to hold the platen cover in the open state, there was a platen cover holding device that was configured to hold the platen cover in the open state by using elasticity such as a spring to cancel the overturning moment due to the platen cover's own weight. However, in this platen cover holding device, vibrations may occur due to inertia and spring force when the platen cover is opened. In order to prevent this, if the force for holding the platen cover in the open state is strengthened, excessive force will be applied to the platen cover and it will easily be damaged, and the operating force for opening and closing the platen cover will also increase, making it easier to open and close the platen cover. I couldn't.

In addition, in order to overcome these difficulties, a cam and a link mechanism are added in addition to the spring, but the structure tends to be complicated and the cost tends to be high.

The present invention relates to a platen cover holding device that eliminates such drawbacks, and in a copying machine equipped with a highly rigid platen cover, the platen cover and the cover supporting portion are provided adjacent to the pivot portion of the platen cover. The platen cover is characterized by having at least one protrusion that can be engaged with (and detached from) each other when the platen cover is open. The object of the present invention is to provide a platen cover holding device which is extremely simple in structure and can be easily and reliably carried out.

As described above, the present invention provides at least one protrusion adjacent to the pivot portion of the platen cover that can be engaged with the platen cover and the cover support portion when the platen cover is open, and can also be detached from the platen cover. When the platen cover is closed, the engagement between the convex part of the platen cover and the convex part of the cover support part is elastically deformed and separated, making it possible to close the platen cover easily. .

On the other hand, when opening the platen cover, the convex part of the platen cover and the convex part of the cover supporting part can be elastically deformed and engaged after coming into contact with each other, so that the platen cover can be easily and reliably held when opened. .

Further, in the present invention, by providing two or more convex portions on either the platen cover side or the cover supporting portion side, the opening angle of the platen cover can be set in two or more stages.

As described above, the present invention provides a holding device that can be easily opened and closed without requiring any special operations, that can be reliably maintained in the open and closed state, and that has an extremely simple structure and is extremely inexpensive. can.

The present invention will be explained below with reference to the embodiments shown in FIGS. 1 to 3.

Reference numeral 1 denotes a copying machine main body, in which a pair of left and right cover support parts 2 are integrally formed at the upper rear end of the copying machine main body 1, and a base part 9 of a platen cover 8 is movable up and down on the cover support part 2 by a shaft 7. It is pivoted to.

A locking portion 3 is integrally provided between the pair of left and right cover support portions 2, and a circular arc notch 4 centered on the shaft 7 is formed in the locking portion 3. An inclined surface 5 is formed in front of the arcuate notch 4 so as to be able to collide with the base 9 of the platen cover 8 to prevent the platen cover from swinging any further when the platen cover is opened. 4 is integrally provided with a protrusion 6 projecting therefrom.

Further, a protrusion 10 is integrally provided on the base 9 of the platen cover 8, and the distance r2 from the center of the shaft 7 to the tip of the protrusion 10 is equal to the distance r1 from the center of the shaft 7 to the tip of the protrusion 6.
It is set slightly longer than the

When a predetermined force is applied to the protrusion 10, the protrusion 10 is elastically deformed, and when the force is removed, the protrusion 10 is immediately restored to its original state, and has excellent fatigue and abrasion resistance.
For example, a material having properties similar to a leaf spring is used.

The protrusion 6 is made of a material that is rigid enough not to be deformed even if it collides with the protrusion 10.

Since the embodiment shown in FIGS. 1 to 3 is constructed as described above, when the platen cover 8 is opened,
The platen cover 8 is rotated about the shaft 7, and the protrusion 10 on the base 9 of the platen cover 8 collides with the protrusion 6 on the arcuate notch 4 of the cover support 2, and the platen cover 8 is opened. As the process progresses, the protrusion 10 is elastically deformed and climbs over the protrusion 6, so that the protrusion 10 and the protrusion 6 engage with each other as shown in FIG. The side portion collides with the inclined surface 5.

This prevents the platen cover 8 from falling forward due to the engagement between the protrusion 10 and the protrusion 6, and also allows the inclined surface 5 to act as a stopper so that the platen cover 8 is opened beyond a predetermined opening angle. When closing, the protrusion IO is elastically deformed and passes over the protrusion 6, and as shown in FIG. Regardless, the platen cover firmly maintains the closed state due to its own weight.

In this way, the opening/closing state can be reliably maintained without requiring any special operations other than opening/closing operations, and the structure is extremely simple, resulting in an extremely inexpensive holding device.

In the embodiment shown in FIGS. 1 to 3, only one protrusion 6 is provided on the locking portion 3, but by providing a large number of protrusions 11 as shown in FIG.
The opening angle can be set to two or more stages.

Further, as shown in FIG. 5, by providing a large number of protrusions 14 on the base g13 of the platen cover 12, the same effects as in the embodiment shown in FIG. 4 can be achieved.

As another embodiment, as shown in FIG. 6, a cover support part 15 is integrally formed at the upper rear end of the copying machine main body 1, and a pair of left and right base parts 19 of a platen cover 18 are attached to the cover support part 15. It is pivotally mounted on a shaft 17 so that it can be raised and lowered freely.

A protrusion 16 is formed on one side of the upper side of the cover support portion 15, and a support piece portion is formed on the base portion 19 of the platen cover 18.

Therefore, when the platen cover 18 is opened, the platen cover 18 is rapidly rotated around the shaft 17, and the support piece on the base 19 of the platen cover 18 moves into the protrusion 16 on the side of the cover support 15. is collided with. When the platen cover 18 is further opened, the support piece portion is elastically deformed in an outward direction substantially perpendicular to the swinging plane of the cover support portion 15 and can ride over the protrusion 16 . In this state where the support piece I has climbed over the protrusion 16, the support piece I is engaged with the protrusion 16,
The platen cover 18 can be kept open.

In this way, in the embodiment shown in FIG. 6, the support piece undergoes elastic bending deformation with ease around the base 19, so that the bending stress generated when the support piece bends is not excessive. , the holding device can withstand repeated use and has excellent durability.

Although the present invention has been described above in detail with reference to the embodiments shown in the drawings, the present invention is not limited to these embodiments, and can be freely modified as necessary without departing from the spirit of the present invention. The design can be modified.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of a copying machine equipped with an embodiment of the platen cover holding device according to the present invention, and FIG. 2 is a perspective view of the copying machine shown in FIG.
3 is an enlarged sectional view of the main part with the platen cover opened, FIGS. 4 and 5 are enlarged sectional views of the main part of other embodiments, and FIG. 6 is an enlarged sectional view of the main part of another embodiment. It is a partial perspective view of an example. ■... Copying machine main body, 2... Cover support part, 3...
Locking portion, 4... Arc-shaped notch, 5... Inclined surface, 6...
...Protrusion, 7...Shaft, 8...Platen cover, 9.
...Base, lO...Protrusion, 11...Protrusion, 12...
・Platen cover, 13...base, 14...protrusion,
I5...Cover support part, 16...Protrusion, 17...
Shaft, 18...Platen cover, 19...Base, addition/
...Support piece. Agent: Patent attorney Nozomi Ehara (1 person) Figure 1 Figure 3

Claims (1)

[Claims] 11111 In a copying machine equipped with a highly flexible platen cover, the platen cover and the cover support portion are provided adjacent to the pivot portion of the platen cover so that the platen cover and the cover support portion can be engaged with each other when the platen cover is open, and both can be disengaged. 1. A platen cover holding device for a copying machine, characterized in that each platen cover holding device is formed with at least one convex portion capable of holding the platen cover.