TW202223528A - 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 same

The present invention relates to a hinge, which is particularly suitable for business machines such as small photocopiers, and connects the original press plate of such business machines to the device body in a reversible manner.

Conventional office machines, such as photocopiers, multi-functional machines, facsimile machines, scanners, printing machines, etc., are mostly provided with a document placing table with exposure glass on the device body, and the document placing table is installed on the main body of the device. The upper cover is provided with an original press plate that can be opened and closed with each other. The original pressing plate makes the original placed on the original placing table close to the original placing platform, so as to avoid the influence of external light through the exposure glass on the developing system in the device body. In order to make the manuscript pressing plate assembled on the device body and open and close relative to the device body, hinges of various structures are known in the prior art, but the hinge of the present invention is a relatively simple structure, which uses several compression coil springs and hinges. Small hinges with orthogonal axes have few precedents in the prior art.

A hinge having this function is known, for example, by the one 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 device body side; the support for supporting the original press platen is assembled into the assembly through the hinge shaft; It has an elongated flat rectangular shape in the intersecting direction; the sliding piece is arranged in the box part to be able to slide, and also has a flat rectangular shape; two compression coil springs are elastically arranged between the sliding piece and the bottom of the box part The pressure-receiving cam portion is arranged on the upper surface of the sliding piece and is biased towards the side of the device body, and is pressed into contact with the actuating cam portion arranged on the support piece.

According to the hinge described in Japanese Patent Laid-Open No. 2016-148815, reducing the diameter of the compression coil spring can reduce the size of the hinge. Compared with the case where the compression coil spring is arranged laterally, the force applied to the hinge shaft can be reduced to Advantages of even distribution in the axis direction. However, in the hinge described in Patent Document 1, when the support is opened and closed, the actuating cam portion applies pressure to the pressure-receiving cam portion, so that the pressing force applied to the slider is biased against the compression screw disposed on the document placement table side. On the spring, the sliding action of the sliding element is affected, so that the sliding element cannot move smoothly.

An object of the present invention is to provide a hinge which uses several longitudinally compressed coil springs, and does not affect the sliding action of the slider even if the pressure-receiving cam portion provided on the slider is biased on the original table side.

In order to solve the above-mentioned problems, the hinge of the present invention includes an assembly, a support, an actuating cam portion, a slider, and a compression coil spring, wherein the assembly is assembled on the device body side and has an elongated box portion in the front-rear direction; the support is The hinge shaft is assembled in the assembly to be rotated, and the original pressing plate is assembled; the actuating cam part is arranged on the side of the supporting part facing the assembly; the sliding part is in contact with the actuating cam and assembled in the assembly It can slide, and a pressure-receiving cam portion is arranged on the side biased against the original device table; and more than three compression coil springs are elastically arranged between the sliding piece and the inner bottom of the assembly piece.

In addition, in the hinge of the present invention, the upper part of the box portion is provided with the hinge shaft, which is adjacent to the connecting portion of the support member, and is provided with a stopper portion for regulating the opening angle of the support member.

Furthermore, in the hinge of the present invention, the front side of the upper end of the sliding member is provided with an oil-smudge-proof and grip-preventing sheet for preventing the original and gripping hands from being soiled.

Moreover, in the hinge of this invention, the lower end part side of the rear part of this box part is provided with the assembly screw hole which assembles this box part to the apparatus main body.

In addition, in the office machine of the present invention, the hinge is provided between the apparatus main body and the document pressing plate.

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

Regarding the hinge of the present invention and a photocopier which is one example of an office machine using the hinge, the following will describe its implementation with reference to the drawings.

As shown in FIG. 1, reference numeral 1 denotes a photocopier, which is one example of the office machine. 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 to the device body 2 through a hinge 10 that can be opened and closed. The hinge 10 of the present invention is used for connecting the document pressing plate 3 to the device body 2 of the photocopier 1 and making the document pressing plate 3 openable and closing, including an assembly 5 and a support 7, wherein the assembly 5 is inserted into and fixed to the device body 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 rotated, and supports the original press plate 3. The hinge 10 of the photocopier 1 is usually provided with a pair of left and right, and since the structure is the same, only one of them will be described. In addition, in the embodiment of the present invention, although the structure of the photocopier 1 provided with the hinge 10 is described, in addition to the photocopier 1, the hinge 10 is provided between the main body of the device, the document pressing plate, and even the cover body. The structure can also be applied to business machines such as multi-functional machines, facsimile machines, scanners, and printing machines.

The hinge 10 of the present invention will be described in detail after FIG. 2 , and its structure includes an assembly member 5 , a support member 7 , an actuating cam portion 7e , a sliding member 8 , and compression coil springs 11 , 12 , and 13 . The assembly 5 is assembled to the photocopier 1 in the front-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 be rotated, and supports the original pressing plate 3; the actuating cam The part 7e is provided on the side of the support part 7 facing 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 deviating from 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 member 8 and the inner bottom portion 5g of the assembly member 5.

The assembly 5 of the hinge 10 of the present invention is a resin-molded product such as POM rich in mechanical strength in this embodiment, and includes a box portion 5a, a pair of assembly piece portions 5b, 5b, a stopper portion 5d, an internal thread 5e, and three guide protrusions 5h, 5h, 5h. The box portion 5a is in the shape of a flat rectangle with an open upper side; a pair of assembling pieces 5b, 5b are protruding from the upper ends of the two sides of the box portion 5a to the top at a certain interval; a stopper 5d is provided on the assembling pieces 5b, 5b Between, the rear plate portion 5c of the box portion 5a is formed inclined downward toward the rear portion; the female thread portion 5e is provided in the front-rear direction of the lower end portion on the side of the rear plate portion 5c; the three guiding protrusions 5h, 5h, 5h are between the inner bottom portion 5g Set upward at specific intervals.

As shown in FIG. 1 , the box 5a of the assembly 5 is inserted into the assembly hole 2b, and the assembly hole 2b is downwardly disposed at the rear end of the device body 2 of the photocopier 1, so it is locked from the device body 2 side by assembling screws. By entering the female screw portion 5e, the box portion 5a can be locked in the assembly hole 2b. Here, it is only necessary to insert the box portion 5a into the assembling hole 2b and fix it.

Next, in this embodiment, the support member 7 and the assembly member 5 of the present invention are both resin-molded products such as POM rich in mechanical strength, and include a connecting portion 7a, an assembly piece 7b, a support portion 7d, and an actuating cam portion. 7e. The connecting portion 7a is inserted between the assembly piece portions 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 portion of the connecting portion 7a; the support portion 7d is provided forward from the connecting portion 7a ; The braking cam portion 7e protrudes downward from the supporting portion 7d. The part of the connection part 7a is assembled|attached to the assembly piece parts 5b and 5b of the assembly 5 through the hinge shaft 6, and can be rotated.

Next, the box portion 5a accommodates a hollow sliding member 8 in the shape of a plane rectangle and can slide up and down. The sliding member 8 is provided with guide protrusions on the side of the assembly member 5 at equal intervals from the inner top 8a to the bottom. The three guide protrusions 8b, 8b, 8b are opposite to the parts 5h, 5h, 5h, and at the same time, the top of the outer side is offset from the center to the position on the front document placing table 2a side, and there is a pressure cam part 8c protruding upward, and, At a position further forward than the pressure-receiving cam portion 8c, a prevention piece 8d for preventing oil stains and preventing a hand from being pinched is protruded upward.

Furthermore, between the box portion 5a and the slider 8, three compression coil springs 11, 12, 13 are spring-loaded on the lower side of the former and on the upper side of the latter, and are respectively accommodated in the guide protrusions 5h, 13 and 13 on the lower side of the box portion 5a. 5h, 5h and among the guide protrusions 8b, 8b, 8b on the upper side of the slider 8 side.

As shown in FIG. 3 and FIG. 4 , in the state where the document pressing plate 3 is closed, the document pressing plate 3 covers the upper surface of the document placing table 2 a, and the braking cam portion 7 e of the support member 7 is pressed against the pressing force of the sliding member 8 . The cam portion 8c keeps the compression coil springs 11, 12, and 13 in the state of the maximum compression limit; however, the weight of the original press plate 3 itself generates rotational torque around the hinge shaft 6, and the original press plate 3 is heavy, so the original The pressing plate 3 is kept closed against the combined elastic force of the compression coil springs 11 , 12 , 13 .

At this time, when the operator of the photocopier wants to place the original on the original setting table 2a, he will first place his finger on the front end of the original pressing plate 3 in order to open the original pressing plate 3 and lift it up, although he may feel the original at first. However, since the total elastic force of the compression coil springs 11, 12, 13 starts to increase, the pressure receiving cam portion 8c of the slider 8 will lift the actuating cam portion 7e of the support portion 7 upward, so it does not Feeling the original weight of the original press platen 3 , the support member 7 can be rotated and opened counterclockwise with the hinge shaft 6 as a fulcrum.

As shown in the torque curve shown in FIG. 6 , in order to make the original pressing plate 3 maintain an opening angle of about 10° relative to the original placing table 2a, the combined elastic force of the compression coil springs 11, 12 and 13 and the original The rotational torque generated by the pressing plate 3 around the hinge shaft 6 balances the two. Then, as also shown in FIG. 6 , the change in the rotational torque of the hinge 10 is greater than the rotational force of the document platen 3, so even if the operator releases his hand, the document platen 3 does not fall naturally and remains in the original position , the operator can place the original on the original placing table 2a using both free hands.

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

Next, after placing the original on the original placing table 2a, when the original pressing plate 3 is pressed down in the closing direction, the support 7 rotates in the clockwise direction with the hinge shaft 6 as a fulcrum, and when the brake cam portion 7e is pressed down The elastic force of the compression coil springs 11, 12, 13 of the pressing cam portion 8c of the slider 8 needs to be resisted, so the closing action will not be too fast, so that the original can be pressed on the original placing table 2a.

Compared with the hinge in which the compression coil springs are arranged horizontally, the hinge 10 of the present invention is as detailed above, because the pressure applied to the hinge shaft 6 is evenly distributed in the axial direction through the sliding member 8, and the hinge shaft will not be twisted. Therefore, the torque fluctuation of the hinge shaft 6 can be suppressed even after long-term use.

Furthermore, in the present invention, when the original press platen 3 is switched on and off, the slider 8 is installed in the box portion 5a of the assembly 5 to be slidable in the up-down direction, and the pressure receiving cam portion 8c is installed at a position offset from the slider 8. The pressure-receiving cam portion 8c is pressed by the actuating cam portion 7e provided on the supporting member 7 side, so that the pressing force of the actuating cam portion 7e is biased to the sliding member 8; however, according to this 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 at the center of the compression coil spring 12, and the pressing force can be evenly distributed to the sliding member 8, so the sliding action of the sliding member 8 It will be smoother than conventional techniques that are biased.

In addition, the hinge 10 of the present invention can use three or more 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 of photocopiers; A small, simple-structured, and easy-to-operate business machine using the hinge as described above.

1: Photocopier 2: Device body 2a: Original table 2b: Assembly hole 3: Original plywood 5: Assembly parts 5a: Box Department 5b: Assemble the piece 5c: rear panel 5d: Stopper 5e: Internal thread part 5g: inner bottom 5h: Guide protrusions 6: Hinge shaft 7: Support parts 7a: Links 7b: Assembly piece 7c: Assembly hole 7d: Support Department 7e: Actuating cam part 8: Slider 8a: inner top 8b: Guide protrusions 8c: Pressed cam part 8d: prevent sheet 10: Hinges 11, 12, 13: Compression coil springs

FIG. 1 is a view from the left side of a photocopier which is one example of the business machine of the present invention, and the photocopier uses the hinge of the present invention. Figure 2 is a perspective view of the hinge of the present invention. FIG. 3 is a left side view of the hinge shown in FIG. 2 . FIG. 4 is a cross-sectional view of the closed state of the hinge shown in FIG. 2 viewed from the left side. FIG. 5 is a cross-sectional view of the hinge shown in FIG. 2 in an open state viewed from the left side. Figure 6 is a torque curve diagram of the hinge of the present invention.

5: Assembly parts

5a: Box Department

5b: Assemble the piece

5c: rear panel

5d: Stopper

5e: Internal thread part

5g: inner bottom

5h: Guide protrusions

6: Hinge shaft

7: Support parts

7a: Links

7b: Assembly piece

7c: Assembly hole

7d: Support Department

7e: Actuating cam part

8: Slider

8a: inner top

8b: Guide protrusions

8c: Pressed cam part

8d: prevent sheet

10: Hinges

11, 12, 13: Compression coil springs

Claims (5)

A hinge comprising: an assembly, which is assembled on a device body side and has an elongated box portion in the front-rear direction; a supporting piece, which is assembled to the assembling piece through a hinge shaft to be rotated, and assembles an original lamination plate; an actuating cam portion, which is arranged on the side of the support piece facing the assembly piece; a sliding part, which is in contact with the actuating cam part and assembled in the assembly part so as to be able to slide; A compression coil spring, which is elastically arranged between the sliding element and the inner bottom of the assembly element with at least three springs. According to the hinge of claim 1, 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 supporting part, and is provided with a stop part for regulating the opening angle of the supporting part. The hinge according to any one of Claims 1 and 2, wherein the front side of the upper end of the sliding member is provided with an anti-oil stain and a hand-pinch prevention sheet to prevent the original from being soiled and hand-pinch. According to the hinge of claim 1, the lower end side of the rear portion of the box portion is provided with an assembly screw hole for assembling the box portion to the device body. An office machine, wherein the hinge according to any one of claims 1 to 4 is provided between the device body and the manuscript pressing plate.

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