TWI796847B - Hinge and business machine using the same - Google Patents

Abstract

The present invention provides a hinge and a business machine using the same. The hinge includes an assembly member, a support member, an actuating cam portion, a sliding member, and a compression coil spring. The assembly member is arranged on the side of the device main body and has a long box portion in the front and rear direction. The support member is assembled to the assembly member through a hinge shaft and is thus rotatable, and it is further assembled to a manuscript pressing plate. The actuating cam portion is arranged on one side of the support member facing the assembly member. The sliding member is in contact with the actuating cam portion and is assembled in the box portion of the assembly member so it is slidable. A compressed cam portion is provided on one side of the actuating cam portion biasing the manuscript arranging table. Three or more of the compression coil springs are configured between the sliding member and the inner bottom of the assembly member.

Description

Hinges and business machines using the hinges

The present invention relates to a hinge, which is especially suitable for business machines such as small photocopiers, and connects the original pressing plate of such business machines to the device body in an openable and closable manner.

Known business machines used in offices, such as: photocopiers, compound machines, fax machines, scanners, printing machines and other machines, most of them are equipped with a manuscript placement table with exposure glass on the device body, and the manuscript placement table The upper cover is provided with an original pressing plate that can be opened and closed with it. The original pressing plate makes the original placed on the original placing table close to the original placing table, so as to prevent the external light from passing through the exposure glass from affecting the imaging system in the device body. In order to assemble the original pressing plate on the device body and open and close relative to the device body, there are hinges of various structures in the prior art, but the hinge of the present invention belongs to a relatively simple structure, which uses several compression coil springs and hinges. There are few examples of small hinges with orthogonal axes in the prior art.

A hinge having this function is known, for example, as described in the following prior art document - Patent Document 1. In the hinge described in the following patent document 1, the assembly is assembled on the side of the device body; the support for supporting the original press plate is assembled to the assembly through the hinge shaft; In the crossing direction, it is in the shape of a long plane rectangle; the slider is set in the box to slide, and is also in the shape of a plane rectangle; two compression coil springs are elastically arranged between the slider and the bottom of the box ; The pressure cam part is set on the sliding part and is biased to the side of the device body, and is in pressure contact with the action cam part provided on the support part.

According to the hinge described in Japanese Patent Publication No. 2016-148815, reducing the diameter of the compression coil spring can not only reduce the size of the hinge, but also reduce the force applied to the hinge axis compared to the one where the compression coil spring is arranged horizontally. The advantage of even distribution in the axial direction. However, in the hinge described in Patent Document 1, when the support member is opened and closed, the actuating cam portion applies pressure to the pressure receiving cam portion, leading to As a result, the pressing force on the sliding part will be biased on the compressed coil spring arranged on the side of the original table, which will affect the sliding action of the sliding part and make the sliding part unable to move smoothly.

The object of the present invention is to provide a hinge that uses several longitudinally compressed coil springs, so that the sliding action of the slider will not be affected even if the compressed cam portion on the slider is biased to the side of the original table.

In order to solve the above-mentioned problems, the hinge in the present invention includes an assembly, a support, an actuating cam, a slider, and a compression coil spring, wherein the assembly is assembled on the side of the device body and has a long box portion in the front and rear direction; the support is a The hinge shaft is assembled on the assembly part to be able to rotate, and the original pressing plate is assembled; the actuating cam part is provided on the supporting part facing the assembly part side; the sliding part is in contact with the actuating cam part and assembled in the assembly part To be able to slide, and a pressure cam portion is provided on the side of the biased original placement platform; three compression coil springs are elastically arranged between the sliding part and the inner bottom of the assembly part and are arranged in a row longitudinally, wherein the The crimping positions of the actuating cam portion and the pressure receiving cam portion are biased towards the compression coil spring side in the middle.

Moreover, in the hinge of the present invention, the upper part of the box part is provided with one side of the hinge shaft, which is adjacent to the connecting part of the support part, and is provided with a stop part for regulating the opening angle of the support part.

Furthermore, in the hinge of the present invention, the front side of the upper end of the slider is provided with an anti-oil and anti-pinching sheet to prevent the original document from being soiled and pinching hands.

Furthermore, in the hinge of the present invention, an assembly screw hole for assembling the box to the device body is provided on the lower end side of the rear portion of the box.

In addition, in the office machine of the present invention, the hinge is provided between the device body and the original pressing plate.

The present invention adopts the above-mentioned structure, so even if several longitudinally compressed coil springs are used, and the pressure-receiving cam portion provided on the slider is biased to the side of the original table, the sliding action of the slider will not be affected.

1: photocopier

2: Device body

2a: Original table

2b: Assembly hole

3: Original press board

5: Assemblies

5a: box part

5b: Assembly piece

5c: Rear panel

5d: stop part

5e: Internal thread part

5g: inner bottom

5h: Guide protrusion

6: Hinge shaft

7: Support piece

7a: Connecting part

7b: Assembly piece

7c: Assembly hole

7d: Support Department

7e: Actuating cam part

8: Slider

8a: inner top

8b: Guide protrusion

8c: Pressed cam part

8d: prevent sheet

10: hinge

11, 12, 13: compression coil spring

Fig. 1 is a view of a photocopier, one example of the office machine of the present invention, viewed from the left side, and the photocopier uses the hinge of the present invention.

Fig. 2 is a perspective view of the hinge of the present invention.

Fig. 3 is the left side view of the hinge shown in Fig. 2 .

Fig. 4 is a sectional view of the closed state of the hinge shown in Fig. 2 viewed from the left side.

Fig. 5 is a sectional view of the opened state of the hinge shown in Fig. 2 viewed from the left side.

Fig. 6 is a torque curve diagram of the hinge of the present invention.

Regarding the hinge of the present invention and a photocopier which is an example of an office machine using the hinge, its embodiment will be described below with reference to the drawings.

As shown in FIG. 1, reference numeral 1 indicates a photocopier as an example of office equipment. According to the drawings, the photocopier 1 includes a device body 2 and a document pressing plate 3 , and the document pressing plate 3 is assembled on the device body 2 through a hinge 10 so that it can be opened and closed. The hinge 10 of the present invention is used to connect the original pressing plate 3 to the device body 2 of the photocopier 1 so that the original pressing plate 3 can be opened and closed. The assembly hole 2b on the 2 side; the support member 7 is assembled to the assembly member 5 through the hinge shaft 6 to be able to rotate, and supports the original pressing plate 3 . The hinge 10 of the photocopier 1 usually has a pair of left and right hinges, and since the structure is the same, only one of them will be described. Also, in the embodiment of the present invention, although the structure of the photocopier 1 equipped with the hinge 10 is described, in addition to the photocopier 1, the device body, the original pressing plate, and even the cover are equipped with the hinge 10. The structure can also be applied to business machines such as multifunction machines, facsimile machines, scanners, and printing machines.

The hinge 10 of the present invention is described in detail after FIG. 2 , and its structure includes an assembly part 5 , a supporting part 7 , an actuating cam part 7 e , a sliding part 8 , and compression coil springs 11 , 12 , 13 . The assembly 5 is assembled in the photocopier 1 in the front and rear direction of the device body 2 side, and has a long box portion 5a; the support 7 is assembled to the assembly 5 through the hinge shaft 6 to rotate, and supports the original pressing plate 3; the actuating cam Part 7e is provided on the supporting part 7 towards the side of the assembly part 5; the sliding part 8 is in contact with the actuating cam part 7e and is slidably provided in the assembly part 5, and is provided on the side biased to the original placing table 2a. There is a pressure cam portion 8c; three compression coil springs 11, 12, 13 are elastically arranged between the sliding part 8 and the inner bottom 5g of the assembly part 5.

The assembly part 5 of the hinge 10 of the present invention is a resin molded product such as POM (polyoxymethylene; polyoxymethylene) rich in mechanical strength in this embodiment, and it includes a box part 5a, a pair of assembly piece parts 5b, 5b, a stopper portion 5d, an internal thread portion 5e, and three guide protrusions 5h, 5h, 5h. The box part 5a is in the shape of a flat rectangle with an open upper side; a pair of assembly piece parts 5b, 5b protrude from the upper end to the top of both sides of the box part 5a at a specific interval; the stopper part 5d is arranged on the assembly piece parts 5b, 5b In between, the rear plate portion 5c of the box portion 5a is inclined downward towards the rear portion; the internal thread portion 5e is arranged in the front and rear direction of the lower end portion of the rear plate portion 5c side; the three guide protrusions 5h, 5h, 5h are between the inner bottom 5g Set upwards at specific intervals.

The assembly 5 is shown in Figure 1, its box part 5a is inserted into the assembly hole 2b, and the assembly hole 2b is arranged downwards at the rear end of the device body 2 of the photocopier 1, so it is locked from the side of the device body 2 through the assembly screw. The box part 5a can be locked in the assembly hole 2b by inserting the internal thread part 5e. In addition, here, the box part 5a may just be inserted into the assembly hole 2b and fixed.

Next, in this embodiment, the supporting part 7 of the present invention and the assembly part 5 are resin molded products such as POM rich in mechanical strength, which include a connecting part 7a, an assembly piece 7b, a supporting part 7d, and an actuating cam part 7e. The connecting portion 7a is inserted between the assembly pieces 5b and 5b of the box portion 5a; the assembly piece 7b is provided with an assembly hole 7c protruding upward from the rear end of the connecting portion 7a; the supporting portion 7d is provided forward from the connecting portion 7a ; The brake cam portion 7e protrudes downward from the support portion 7d. The connecting portion 7a is rotated by being assembled to the assembly pieces 5b, 5b of the assembly 5 through the hinge shaft 6 .

Secondly, the box part 5a accommodates a hollow sliding part 8 that is rectangular in plane and can slide up and down. The sliding part 8 is provided with guide protrusions on the side of the assembly part 5 at equal intervals from the inner top 8a to the bottom. The three guide protrusions 8b, 8b, 8b facing the parts 5h, 5h, 5h, and at the same time, their outer tops are biased from the center to the position on the side of the front original placement table 2a, and a pressure-receiving cam part 8c protruding upward is provided. At a position further forward than the pressure-receiving cam portion 8c, an oil stain-proof and hand-pinch preventing piece 8d protrudes upward.

Furthermore, between the box part 5a and the slider 8, three compression coil springs 11, 12, 13 are elastically provided on the lower side of the former and the upper side of the latter. 5h, 5h and the guide protrusions 8b, 8b, 8b on the upper side of the slider 8 side.

As shown in Figures 3 and 4, in the state where the original pressing plate 3 is closed, the original pressing plate 3 covers the top of the original placing table 2a, and the braking cam portion 7e of the supporting member 7 is pressed against the pressure receiving portion of the sliding member 8. The cam part 8c makes the compression coil springs 11, 12, 13 in the state of the maximum compression limit; but the original pressing plate 3 The weight of the body produces a rotational torque around the hinge shaft 6, and the original pressing plate 3 is relatively heavy, so the original pressing plate 3 can resist the combined elastic force of the compression coil springs 11, 12, 13 and maintain a closed state.

At this time, when the operator of the photocopier intends to place the original on the original placement table 2a, he will first put his finger on one end of the front side of the original pressing plate 3 and lift it up in order to open the original pressing plate 3. The weight of the pressing plate 3, but then because the total elastic force of the compression coil springs 11, 12, 13 starts to increase, the pressure cam portion 8c of the slider 8 will lift up the actuating cam portion 7e of the support portion 7, so it will not Feeling the original weight of the original pressing plate 3, the support member 7 can be rotated and opened counterclockwise with the hinge shaft 6 as the fulcrum.

As shown in the torque curve shown in Figure 6, in order to make the original pressing plate 3 maintain an opening angle of about 10° relative to the original placement table 2a, the combined elastic force of the compression coil springs 11, 12, 13 and the original should be properly set. The rotational torque generated by the pressing plate 3 around the hinge axis 6 balances the two. Then, as also shown in FIG. 6, the rotational torque of the hinge 10 changes more than the rotational moment of the original pressing plate 3, so that even if the operator releases his hand, the original pressing plate 3 will not fall naturally but will remain in place. , the operator can place the original on the original placing table 2 a with both free hands.

Here, the combined elastic force of the original pressing plate 3 and the compression coil springs 11, 12, 13 can be set so that the original pressing plate 3 automatically supports the original pressing plate 3 at a specific opening angle (for example, above 35°). In this way, when the opening angle of the original pressing plate 3 is above 35°, the lower end surface of the support member 7 on the side of the connecting portion 7a will be automatically lifted until the lower end surface abuts against the stopper provided on the side of the assembly member 5 5d, and the original pressing plate 3 also stops at this opening angle.

Next, when the original is placed on the original table 2a, when the original pressing plate 3 is pressed down toward the closing direction, the supporting member 7 will rotate clockwise with the hinge shaft 6 as the fulcrum, and when the stopper cam 7e is pushed down, It is necessary to resist the elastic force of the compression coil springs 11, 12, 13 of the compression cam portion 8c of the slider 8, so the closing action will not be too fast, and the original can be pressed on the original placement table 2a.

Compared with hinges with compressed coil springs arranged horizontally, the hinge 10 of the present invention, as described in detail above, distributes the pressure applied to the hinge shaft 6 evenly in the axial direction through the slider 8, and does not exert torsion on the hinge shaft. Directional pressure, so the torque fluctuation of the hinge shaft 6 can be suppressed even after a long period of use.

Also, in the present invention, when the switch operation of the original pressing plate 3 is performed, the slider 8 is set in the box portion 5a of the assembly 5 and can slide in the up and down direction, because the setting position of the pressure receiving cam portion 8c is biased against the slider 8 The original document placement table 2a side is provided, and the pressure receiving cam portion 8c is pressed against the actuating cam portion 7e provided on the support member 7 side, so that the pressing force of the actuating cam portion 7e is biased against the slider 8; but according to the present invention In the hinge of the invention, the lower side of the contact position of the actuating cam portion 7e and the pressure receiving cam portion 8c is located on the side of the compression coil spring 12 in the center, and the pressing force can be evenly distributed to the slider 8, so the sliding action of the slider 8 It will be smoother than known techniques that can be biased.

Also, the hinge 10 of the present invention can use more than three compression coil springs.

To sum up, the present invention can provide a hinge suitable for opening and closing the original pressing plate due to the above-mentioned structure, and the original pressing plate is used for smaller models in photocopiers; A small business machine with a simple structure and good operability, the business machine uses the aforementioned hinge.

5: Assemblies

5a: box part

5b: Assembly piece

5c: Rear panel

5d: stop part

5e: Internal thread part

5g: inner bottom

5h: Guide protrusion

6: Hinge shaft

7: Support piece

7a: Connecting part

7b: Assembly piece

7c: Assembly hole

7d: Support Department

7e: Actuating cam part

8: Slider

8a: inner top

8b: Guide protrusion

8c: Pressed cam part

8d: prevent sheet

10: hinge

11, 12, 13: compression coil spring

Claims (5)

A hinge comprising: an assembly assembled on a device body side and having an elongated box portion in the front-rear direction; a support member assembled to the assembly through a hinge shaft to be rotatable, And assemble an original pressing plate; an actuating cam part, which is provided on the side of the supporting part facing the assembly part; a sliding part, which is in contact with the actuating cam part and assembled in the assembly part to slide, And there is a pressed cam portion on one side of an original placement platform; and a compression coil spring, which is elastically installed between the sliding part and the inner bottom of the assembly part and arranged in a row longitudinally, wherein the The crimping positions of the actuating cam portion and the pressure receiving cam portion are biased towards the compression coil spring side in the middle. As for the hinge described in claim 1, one side of the hinge shaft is provided on the upper part of the elongated box part, which is adjacent to the connection part of the support part, and a stop part for regulating the opening angle of the support part is provided. The hinge as described in any one of claim 1 or 2, the upper end of the sliding member is provided with an anti-oil and anti-clamping sheet to prevent the original document from being soiled and the clamping hand. As for the hinge described in claim 1, an assembly screw hole for assembling the elongated box portion to the device body is provided on the lower end side of the rear portion of the elongated box portion. A business machine, wherein the hinge described in any one of Claims 1 to 4 is provided between the device body and the original pressing plate.

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