TW202305494A - Hinge and business machine using the same - Google Patents

Abstract

The present invention provides a hinge and an office machine using the hinge. The hinge can increase the independence and degree of freedom when setting the torque curve of the second opening and closing angle range, and can set proper torque curve for entire opening and closing angle ranges of the opening and closing body. The hinge is connected with an opening and closing body relative to the device body so that it can be opened and closed, and it includes: a mounting member having a box part with an open top and mounted on the device body side; a support member assembled to the mounting member through the hinge shaft, so that it can be rotated, and supporting the opening and closing body; a sliding member sliding up and down in the box part; and a compression coil spring elastically arranged between the sliding member and the mounting member.

Description

Hinges and business machines using the hinges

The invention relates to a hinge, which is especially suitable for connecting the opening and closing body to the device body of the business machine in an openable and closable manner.

Known business machines used in offices, such as photocopiers, compound machines, facsimile machines, scanners, printing machines, etc., most of them are equipped with an original placement table with exposure glass on the device body, and on the original placement table The cover is provided with an original pressing plate that can be opened and closed with it. The original document pressing plate makes the original document placed on the original document loading table close to the original document loading table, so as to prevent external light from passing through the exposure glass from affecting the imaging system in the device body. Hinges of various structures have been known in the prior art so that the document pressing plate can be opened and closed relative to the device body by being mounted on the device body.

The hinge described in Japanese Unexamined Patent Publication No. 2009-71804 is to connect an opening and closing body with respect to the device body so that it can be opened and closed. A support piece that is assembled to the mounting piece through a hinge shaft to rotate and support the opening and closing body; a sliding piece that slides up and down in the box; and a compression coil spring elastically installed between the sliding piece and the mounting piece . The mounting part has an actuating cam portion protruding toward the box portion; the slider has a pressed cam portion crimped on the actuating cam portion; Crimps within the angular range and forms a torque curve.

According to the hinge torque curve recorded in Figure 16 of Japanese Patent Laid-Open No. 2009-71804, the opening and closing body pushes against the device body within the range of 0°-15° opening and closing angle on the closing side. Within the range of 15°～70° opening and closing angle on the opening side, the opening and closing will maintain the current opening position, realizing the so-called random stop.

Therefore, the hinge system described in Japanese Unexamined Patent Publication No. 2009-71804 is designed with an actuating cam portion and a pressure cam portion, so that the support member forms a relatively open-close body within the opening-closing angle range of 17°-70° on the opening side. The support torque with large weight moment makes the supporting part form a support torque smaller than the weight moment of the opening and closing body within the opening and closing angle range of 0°~17° on the closing side.

However, it is difficult to set an appropriate torque curve that meets all the opening and closing angle ranges of the opening and closing body only by relying on a set of actuating cams and pressure receiving cams as above. Even if an appropriate torque curve is set for the first opening angle range on the opening side, it is difficult to set an appropriate torque curve within the second opening angle range on the closing side following the first opening angle range. For example, if it is set in the first opening and closing angle range of 60° to 20° to make it stop randomly, the falling speed of the opening and closing body will be too large in the second opening and closing angle range of 20° to 0°, and There is a case where the device body is hit hard.

The purpose of the present invention is to provide a hinge that can increase independence and freedom when setting the torque curve in the second opening and closing angle range, and can set appropriate torque curves in all opening and closing angle ranges of the opening and closing body.

In order to solve the above problems, the hinge system of the present invention connects an opening and closing body with respect to the device body so that it can be opened and closed. The hinge system includes: a mounting part, a supporting part, a sliding part and a compression coil spring. The mounting part is installed on the side of the device body, and has a box part with an open upper part; the support part is assembled to the mounting part through a hinge shaft to rotate, and supports the opening and closing body; the sliding part slides up and down in the box part; The compression coil spring is elastically arranged between the sliding part and the mounting part. The supporting member has a first actuating cam portion and a second actuating cam portion that protrude toward the box portion and are parallel; The second pressure-receiving cam portion that the actuating cam portion crimps on. The first actuating cam portion and the first pressurized cam portion form a first torque curve within the first opening and closing angle range of the mounting piece and the support piece; the second actuating cam portion and the second pressured cam portion A second torque curve is formed within a second opening and closing angle range of the installation part and the support part.

In the hinge of the present invention, the first actuating cam portion and the first pressure receiving cam portion are separated from each other within the second opening and closing angle range.

In the hinge of the present invention, the second actuating cam portion and the second pressure receiving cam portion are separated from each other within the first opening and closing angle range.

In the hinge of the present invention, the first actuating cam portion and the first pressure receiving cam portion form a first peak supporting torque within the first opening and closing angle range, and the supporting torque is compared with the weight moment of the opening and closing body Large; the second actuating cam portion and the second pressure cam portion form a second peak value of supporting torque within the second opening and closing angle range, and the supporting torque is higher than that of the opening and closing body following the first peak value The weight moment is small.

In the hinge of the present invention, the second actuating cam portion protrudes from the outside of the supporting member in the diameter direction centered on the hinge axis, and protrudes more than the first actuating cam portion.

In the hinge of the present invention, the second actuating cam portion includes a lifting surface and a sliding surface, and the lifting surface presses down the sliding member as the support member rotates toward 0 degrees within the second opening and closing angle range, to increase the compression of the compression coil spring; the sliding surface is continuous with the lifting surface to slide the second actuating cam portion and the second compression cam portion to reduce the compression of the compression coil spring.

In the hinge of the present invention, the second pressure-receiving cam portion has a pressure-receiving sliding surface facing the hinge shaft side in an up-and-down direction, and the sliding surface of the second actuating cam portion is within the range of the second opening and closing angle. As the supporting member rotates toward 0 degrees, it faces the pressed sliding surface and begins to slide.

In the office machine of the present invention, the above-mentioned hinge is arranged between the device body and the original pressing plate.

According to the hinge of the present invention, the first actuating cam part and the first pressure-receiving cam part are press-connected within the first opening-closing angle range above a specific opening-closing angle to form a first torque curve, and the second actuating cam part and the second receiving cam part The pressing cam part is press-contacted within the second opening angle following the first opening angle range but less than a specific opening angle to form a second torque curve, the torque of which is smaller than the first torque curve. Therefore, the second actuating cam portion and the second pressure receiving cam portion can be adjusted without affecting the first torque curve, and various conditions of the second torque curve can be set. In this way, the hinge provided by the present invention can ensure independence and freedom when setting the torque curve in the second opening and closing angle range, and set more appropriate torque curves in all opening and closing angle ranges of the opening and closing body. Wherein, the first opening and closing angle range can be an angle range of the opening side above a certain angle, and the second opening and closing angle range can also be an angle range of the closing side, and the angle range of the closing side is adjacent to the angle range of the opening and closing angle that is less than a certain opening and closing angle. The first opening and closing angle range. As will be described later, the torque curve can be quickly switched between the continuous first opening and closing angle range and the second opening and closing angle range. Moreover, according to the application of the business machine, when the opening and closing body is on the closing side of 0°, it will push the device body, so the torque of the second torque curve is smaller than that of the first torque curve.

According to the hinge of the present invention, within the second opening-closing angle range when the second actuating cam portion and the second pressure-receiving cam portion are pressed together, the first actuating cam portion and the first pressure-receiving cam portion are separated from each other. Therefore, the second torque curve can be set by adjusting the second actuating cam portion and the second pressure receiving cam portion without being affected by the first actuating cam portion and the first pressure receiving cam portion.

According to the hinge of the present invention, within the first opening-closing angle range when the first actuating cam portion and the first pressure-receiving cam portion are pressed together, the second actuating cam portion and the second pressure-receiving cam portion are separated from each other. Therefore, the first torque curve can be set by adjusting the first actuating cam portion and the first pressure receiving cam portion without being affected by the second actuating cam portion and the second pressure receiving cam portion.

According to the hinge of the present invention, in the first opening and closing angle range, the opening and closing body can be set to stop at will by using the first peak value of the support torque which is larger than the weight moment of the opening and closing body. Moreover, the second peak value of the support torque which is smaller than the weight moment of the opening and closing body can be used in the second opening and closing angle range to set the combination of the deceleration mode and the pushing force of the opening and closing body in a wide range.

According to the hinge of the present invention, the first actuating cam portion and the second actuating cam portion can be realized through a simple structure, such as forming a dimensional difference in the diameter direction of the supporting member.

According to the hinge of the present invention, the compression of the compression coil spring can be rapidly reduced by the sliding of the sliding surface, so that the second torque curve in the second opening and closing angle range can form a sudden drop mode of supporting torque.

According to the hinge of the present invention, the support torque system of the second torque curve forms a sharp drop mode at the supporting member rotation angle at which the pressure sliding surface of the second pressure receiving cam portion and the sliding surface of the second actuating cam portion are opposite to each other. .

According to the office machine of the present invention, independence and freedom can be ensured when setting the torque curve of the opening and closing body in the second opening and closing angle range, and appropriate torque curves can be set in all opening and closing angle ranges of the opening and closing body.

The following is an example of an implementation type of a photocopier, and the hinge of the present invention and the business machine using the hinge are described in detail in conjunction with the drawings. As shown in FIG. 1 , in a photocopier 1 , a hinge 10 according to an embodiment of the present invention is provided between a device body 2 and an original pressing plate 3 . The photocopier 1 has a device body 2 and a document pressing board 3 , the device body 2 is provided with an exposure glass 2 a ; The hinge 10 of the photocopier 1 usually has a pair of left and right hinges, both of which have the same structure, so only one of them will be described below.

The rear lower end of the box portion 5 a of the mounting member 5 is provided with an internal threaded hole 5 e for mounting the box portion 5 a to the device body 2 . The hinge 10 allows the box part 5a of the mounting part 5 to be inserted into the insertion hole 2b provided at the rear end of the device body 2 of the photocopier 1 from above, and then locked in by the assembly screw 5f locked from the device body 2 side. The threaded hole 5e is fixed to the insertion hole 2b. In addition, the case part 5a may be inserted and fixed in the insertion hole 2b independently.

As shown in FIGS. 2 and 3 , the hinge 10 connects the original pressing plate 3 to the device body 2 to open and close, and includes: a mounting part 5 , a supporting part 7 , a sliding part 8 and a compression coil spring 11 . The mounting part 5 has a box part 5a open to the upper part and is installed on the side of the device body 2; the support part 7 is rotatably arranged on the mounting part 5 through the hinge shaft 6 and supports the original pressing plate 3; the sliding part 8 is tied to the box part 5a slides up and down; the compression coil spring 11 is elastically arranged between the sliding part 8 and the mounting part 5 .

The hinge shaft 6 passes through the mounting holes 6a, 6a of the mount 5 and the through hole 6e of the support 7 from the head 6d side, and is prevented from falling off by fitting the ring 6c into the ring groove 6b. The box portion 5a accommodates a hollow sliding member 8 that can slide up and down to form a plane square. The slider 8 has a guide groove 8j in the vertical direction; the guide groove 8j is guided to the guide protrusion 5j of the box portion 5a shown in FIG. 4 . The lower part side of the compression coil spring 11 is inserted into the guide protrusion part 5h of the case part 5a, and press-contacts the bottom plate part 5g of the case part 5a. The upper side of the compression coil spring 11 is inserted into the slider body 8a of the slider 8 shown in FIG. 6 and pressed against the abutting portion 8d.

In the implementation mode, the mounting part 5 is a resin molded product such as POM rich in mechanical strength, and has: a box part 5a, a pair of mounting piece parts 5b and 5b, a stop part 5d, a stop part 5i, and an internal thread hole 5e And the guide protrusion 5h, wherein the box part 5a is square in plane and its upper part is open; a pair of mounting piece parts 5b, 5b are spaced apart at a specific interval and protrude upward from the upper ends of both sides of the box part 5a; The stop part 5d is horizontally arranged on the upper end of the rear plate part 5c of the box part 5a between the installation piece parts 5b and 5b; the stop part 5i is connected to the installation piece parts 5b and 5b and is arranged on the opposite side to the stop part 5d ; The internally threaded hole 5e is provided at the lower end of the rear plate portion 5c in the front-rear direction; the guide protrusion 5h is provided in the bottom plate portion 5g facing upward.

In the implementation mode, the supporting member 7 is a resin molded product such as POM rich in mechanical strength, and has: a connecting part 7a, an assembly piece 7b, a supporting part 7d, and an actuating cam part 7e; wherein the connecting part 7a is inserted into the mounting part 5 and its Between the mounting piece parts 5b and 5b; the assembly piece 7b protrudes from the connecting part 7a to the left and right and is provided with a mounting hole 7c; the supporting part 7d is arranged in a beam shape from the connecting part 7a toward the front; the actuating cam part 7e is from the connecting part 7a The support portion 7 d protrudes toward the slider 8 . The actuating cam portion 7e is integrally rotated with the support 7 around the hinge shaft 6 . As shown in FIG. 3 , the supporting member 7 is installed through the hinge shaft 6 , so that its connecting portion 7 a can rotate relative to the mounting pieces 5 b and 5 b of the mounting member 5 .

The slider 8 is provided with a pressure receiving cam portion 8e protruding upward at a position where the outer top is biased forward from the center. As shown in Figures 9 to 13, as the support member 7 rotates around the hinge shaft 6, the actuating cam portion 7e also presses and rotates behind the pressure cam portion 8e, so that the sliding member 8 supported by the compression coil spring 11 moves up and down. slide. In the closing angle of 0° as shown in FIG. 13 , the stopper portion 5i abuts against the assembly piece 7b of the support member 7 to limit the closing angle. However, in the opening angle of 60 degrees as shown in FIG. 9 , the stop portion 5 d abuts against the end surface 7 i of the support member 7 to limit the opening angle.

As shown in FIG. 7, in the closed state of the original pressing plate 3, the original pressing plate 3 covers the upper surface of the exposure glass 2a. At this time, as shown in FIG. 8 , because the weight moment of the original pressing plate 3 is greater than the supporting torque generated by the compression coil spring 11 around the hinge shaft 6 through the slider 8, the original pressing plate 3 can resist the supporting torque and maintain the closed state. .

Thereafter, the operator who performs photocopying puts a finger on one end of the front side of the document presser plate 3 and lifts it up in order to place the document on the exposure glass 2a. In this way, although the weight of the original pressing plate 3 will be felt at first, but then because the supporting torque of the compression coil spring 11 is strong, the pressed cam portion 8e of the slider 8 will push the actuating cam portion 7e of the supporting portion 7 Lift up. Therefore, as shown in FIG. 1 , the original weight of the document pressing plate 3 is less felt, and the supporting member 7 can be rotated and opened counterclockwise with the hinge shaft 6 as a fulcrum.

Next, the operator places the original on the exposure glass 2a, and then presses down the original pressing plate 3 in the closing direction. In this way, the supporting member 7 will rotate counterclockwise around the hinge shaft 6, and the actuating cam portion 7e of the supporting member 7 will resist the elastic force of the compression coil spring 11 to press down the pressed cam portion 8e of the sliding member 8. . Therefore, when the original pressing plate 3 is closed, it does not drop suddenly, and the original can be tightly bonded to the exposure glass 2a.

In addition, in the hinge 10 of Embodiment 1, by adding the following structure, the original pressing plate 3 can realize the movement as if equipped with an oil damper in the angle range of 8 degrees to 0 degrees.

First, the mount 5 has a first operating cam portion C1 and a second operating cam portion C2 that protrude toward the box portion 5 a and are parallel to each other. The slider 8 has a first pressure receiving cam portion D1 pressed against the first operating cam portion C1 and a second pressure receiving cam portion D2 pressed against the second operating cam portion C2. Moreover, the first actuating cam portion C1 and the first pressure receiving cam portion D1 are in pressure contact with each other in the first opening and closing angle range E1 above a certain opening and closing angle on the document pressing plate 3 to form a first torque curve F1; The actuating cam portion C2 and the second pressure-receiving cam portion D2 are in contact with each other in the second opening angle range E2 which continues the first opening angle range E1 but is less than a specific opening angle range to form a torque greater than that of the first torque curve F1 Small second torque curve F2. Therefore, the designs of the second actuating cam portion C2 and the second pressure receiving cam portion D2 can be changed without affecting the first torque curve F1, and various conditions of the second torque curve F2 can be set. In this way, independence and freedom can be ensured when setting the torque curve of the second opening and closing angle range E2 , and appropriate torque curves can be set for all opening and closing angle ranges of the document pressing plate 3 .

In other words, the first operating cam portion C1 and the first pressure receiving cam portion D1 are separated within the second opening and closing angle range E2; the second operating cam portion C1 and the second pressing cam portion D2 are separated within the first opening and closing angle range E1 The internal system is separated. Therefore, the second torque curve F2 in the second opening/closing angle range E2 is not affected by the first actuating cam portion C1 and the first pressure receiving portion D1. The first actuating cam portion C1 and the second actuating cam portion C2 arranged in parallel allow the slider 8 to slide without interfering with each other. As shown in Fig. 8, the first actuating cam part C1 and the second actuating cam part C2 can be switched instantaneously between the first opening and closing angle range E1 and the second opening and closing angle range E2. The sliding direction and sliding amount of the slider 8 vary greatly.

In addition, the first actuating cam portion C1 and the first pressure receiving cam portion D1 form a first peak value P1 in which the support torque is larger than the weight moment of the original pressing plate 3 in the first opening and closing angle range E1; the second actuating cam portion C2 and the second actuating cam portion C2 and The second pressure-receiving cam portion D2 forms a second peak value P2 of supporting torque following the first peak value P1 and smaller than the weight moment of the original pressing plate 3 within the second opening-closing angle range E2 . Therefore, the supporting torque corresponding to the weight torque of the original pressing plate 3 can be set in the first opening and closing angle range E1, so that the original document pressing plate 3 can be stopped at will. At the same time, the supporting torque can be used in the second opening and closing angle range E2 The second peak value P2 is used to set the combination of various deceleration modes and pushing forces of the document pressing plate 3 .

Moreover, the second actuating cam portion C2 protrudes from the outside of the support member 7 in the diameter direction centered on the hinge shaft 6, and protrudes more than the first actuating cam portion C1. The small first actuation cam portion C1 and the second actuation cam portion C2 can be realized with a simple structure, for example, a dimensional difference in the diameter direction is formed on the support member 7 .

In addition, the second actuating cam part C2 has a lifting surface 7j and a sliding surface 7h, and the lifting surface 7j presses down the sliding member 8 as the support member 7 rotates toward 0 degrees in the second opening and closing angle range E2, so as to increase the compression Compression of the coil spring 11; the sliding surface 7h is continuous with the lifting surface 7j to slide the second actuating cam portion C2 and the second pressure receiving cam portion D2 to reduce the compression of the compression coil spring 11 . According to this configuration, the compression of the compression coil spring 11 is rapidly reduced due to the sliding of the sliding surface 7h, so that a sharp drop mode of supporting torque can be added to the second torque curve F2 in the second opening and closing angle range E2.

In addition, the second pressure-receiving cam portion D2 has a pressure-receiving sliding surface 8h facing the side of the hinge shaft 6 in an up-and-down direction, and the sliding surface 7h of the second actuating cam portion C2 moves along with the supporting member within the second opening and closing angle range E2. 7 rotates toward 0 degrees and is opposed to the pressure sliding surface 8h and starts to slide. As shown in (a) and (b) of FIG. 6 , the pressure-receiving sliding surface 8h makes the portion of the pressure-receiving cam portion 8e along the moving direction R of the working cam portion 7e retreat toward the slider 8 side. According to this configuration, the second torque curve F2 is formed on the rotation angle of the support member 7 at which the pressure sliding surface 8h of the second pressure receiving cam portion D2 and the sliding surface 7h of the second actuation cam portion C2 are opposed to each other. Descent mode. In the hinge 10, in the second opening and closing angle range E2, the angle position where the sliding surface 7h opposes the pressure receiving sliding surface 8h can be highly reproduced, and the supporting torque can be rapidly decreased.

As shown in FIG. 6( b ), the upper portion of the pressure-receiving sliding surface 8 h has an arcuate surface 8 n , and is connected to the top portion of the pressure-receiving cam portion 8 e through the arcuate surface 8 n . In this way, the movement between the pressed sliding surface 8h and the sliding surface 7h from joint (Fig. 12) to sliding (Fig. 13) can be carried out smoothly, and the pressure-pressed sliding surface 8h and the sliding surface 7h can be avoided. The stress and friction between them are too concentrated.

As shown in Figure 5 (a), the first actuating cam portion C1 and the second actuating cam portion C2 are symmetrical and are arranged on the right-angled width direction H of the moving direction R of the actuating cam portion 7e, so that the first actuating cam portion and the second actuating cam portion The actuating cam portion transmits force symmetrically at a position away from the width direction H. As shown in FIG. Therefore, inclination or twisting between the pressure receiving cam portion 8e and the actuating cam portion 7e is difficult to occur, and the positional relationship between the pressure receiving cam portion 8e and the actuating cam portion 7e can be stabilized. The reproducibility of the supporting torque can also be improved. In addition, the friction of the first actuating cam portion and the second actuating cam portion can be dispersed, thereby suppressing the abrasion of the first actuating cam portion and the second actuating cam portion.

Next, the actions of the first actuating cam portion C1 and the second actuating cam portion C2 will be described in time sequence with reference to FIGS. 9 to 13 . As shown in FIG. 9( a ), when the original pressing plate 3 is at an opening angle of 60 degrees, the end surface 7i of the support member 7 abuts against the stopper portion 5d of the mounting member 5 and stops at the opening angle of 60 degrees. On the one hand, the first actuating cam portion C1 and the first pressure receiving cam portion D1 are pressed against the position Q0 and push up the support member 7; on the other hand, as shown in FIG. The two pressure cam portions D2 are separated from each other.

As shown in Figure 10(a), even if the original pressing plate 3 is at a closing angle of 20 degrees, the first actuating cam portion C1 and the first pressure receiving cam portion D1 are pressed against each other and push up the supporting member 7. On the other hand, as As shown in FIG. 10( b ), the second operating cam portion C2 and the second pressure receiving cam portion D2 are separated from each other. Therefore, when the document pressing plate 3 is closed from 60 degrees to 20 degrees, the pressing positions of the first actuating cam portion C1 and the first pressure receiving cam portion D1 move from position Q0 to position Q1.

As shown in Figure 11(a), when the original pressing plate 3 is at a closed angle of 8 degrees, the first actuating cam portion C1 and the first pressure receiving cam portion D1 are pressed in position Q2, and at the same time, the second actuating cam portion C2 And the second pressure-receiving cam portion D2 is press-contacted at the position Q3. Afterwards, the first actuating cam portion C1 is immediately separated from the first pressure receiving cam portion D1, and the second actuating cam portion C2 continues to press against the second pressure receiving cam portion D2. In this way, the process of decreasing the support torque through the first actuating cam portion C1 and the first pressure receiving cam portion D1 will be switched at an acute angle to increase the support torque through the second actuating cam portion C2 and the second pressure receiving cam portion D2 the process of.

As shown in FIG. 12( b ), when the original pressing plate 3 is at a closed angle of 4 degrees, the second actuating cam portion C2 and the second pressure receiving cam portion D2 are pressed against the position Q4. At this time, as shown in FIG. 12( a ), the first operating cam portion C1 is separated from the first pressure receiving cam portion D1 .

Afterwards, the support member 7 continues to rotate, the second actuating cam portion C2 and the second pressure receiving cam portion D2 at the position Q4 are separated from the engaged state, and the sliding surface 7h and the pressure receiving sliding surface 8h slide in a relative state. In this way, the compression of the compression coil spring 11 is rapidly reduced, so that the supporting torque of the original pressing plate 3 is rapidly reduced.

After the sliding, as shown in FIG. 13( a ), the hinge 10 makes the stopper 5i abut against the assembly piece 7b of the support member 7 by the weight moment of the original pressing plate 3 to limit the closing angle to 0°. At this time, as shown in Figure 13(a), the actuating cam portion 7e and the pressure receiving cam portion 8e are in contact with the position Q5, and as shown in Figure 13(b), the sliding surface 7h is in contact with the pressure receiving sliding surface 8h relative. In addition, when the hinge 10 is at a closing angle of 0°, the actuating cam portion 7e of the supporting member 7 can also be pressed against the flat portion on the upper surface of the sliding member 8 .

As explained above, the hinge 10 of Embodiment 1 can increase the supporting torque of the original pressing plate 3 within the range of opening and closing angles less than the specified opening and closing angle through the combination of the conventionally simple actuating cam portion and the pressure receiving cam portion. The number of variation patterns. Furthermore, by using the change mode of the aforementioned support torque, an appropriate change of the support torque can be set during the entire closing process of the original pressing plate 3 .

In addition, the second peak value P2 of the supporting torque generated by the second actuating cam part C2 during the closing process will act like a brake, so the falling speed of the original pressing plate 3 can be suppressed from exceeding a specified opening and closing angle. When the opening and closing angle range falls, the exposure glass 2a will not be exposed to sudden impact.

The present invention is constituted by the above-mentioned structure, and its hinge is suitable for opening and closing the original press plate of a relatively small type of photocopier, and can also provide an office machine with a small hinge, a simple structure, and good operability.

A photocopier generally has a pair of left and right hinges, and the left and right hinges may have the same structure or different structures. Also, in Embodiment 1, the photocopier is a structure with a hinge, but in addition to the photocopier, the device body, the original pressing plate and even the cover of the office equipment such as a multifunction machine, a facsimile machine, a scanning machine, and a printing machine , can also be a structure with a hinge.

In addition, in the setting, the support torque generated by the compressed coil spring and the weight moment of the original pressing plate are maintained in balance, so that the original pressing plate remains self-supporting at an opening angle of about 15° relative to the exposure glass system. After that, it can also be Set the rotational torque of the hinge gradually greater than the rotational torque of the original press plate. In this way, even if the operator leaves the original pressing plate with both hands, the original pressing plate will remain self-supporting and will not fall naturally, allowing the operator to place the original on the exposure glass with free hands.

In addition, the supporting torque of the compression coil spring acting on the original pressing plate can also be set to automatically push the original pressing plate 3 up to 60 degrees when the original pressing plate 3 is above a specific opening angle (20°). As mentioned above, on the side where the hinge shaft 6 is provided on the upper surface of the box portion 5a, there is provided a stopper portion 5d that abuts against the support member 7 and limits the opening angle of the support member 7. As shown in FIG. When the original pressing plate is at an opening angle of more than 20°, it will be opened automatically until the end surface 7i on the side of the connecting portion 7a of the support member 7 abuts against the stopper portion 5d provided on the mounting member 5, and it will be opened at 60° Angle stops.

1: photocopier 10: hinge 11: Compression coil spring 2: Device body 2a: Exposure glass 2b: Insertion hole 3: Original press board 5: Mounting parts 5a: box part 5b: Mounting part 5c: Rear panel 5d: stop part 5e: Internal thread part 5f: Mounting screws 5g: bottom plate 5h: Guide protrusion 5i: stopper 5j: guide protrusion 6: Hinge shaft 6a: Mounting hole 6b: Ring groove 6c: ring piece 6d: head 6e: Through hole 7: Support piece 7a: Connecting part 7b: Mounting piece 7c: Mounting hole 7d: Support Department 7e: Actuating cam part 7h: slip surface 7i: end face 7j: lifting surface 8: Slider 8a: Slide body 8d: docking part 8e: Pressed cam part 8h: Sliding surface under pressure 8j: guide groove 8n: arc surface C1: The first actuating cam part C2: Second actuating cam part D1: The first pressure cam part D2: Second pressure cam part E1: The first opening and closing angle range E2: The second opening and closing angle range F1: The first torque curve F2: The second torque curve H: width direction R: direction of movement Q0, Q1, Q2, Q3, Q4, Q5: position

Fig. 1 is a view of a photocopier viewed from the front, which is an example of an office machine using the hinge of the present invention. Figure 2 is a perspective view of the appearance of the hinge, (a) is its open state; (b) is its closed state. Fig. 3 is an exploded perspective view of the hinge illustrating the structure of the hinge. Figure 4 is an explanatory diagram of the structure of the mounting part, (a) is its top view; (b) is a cross-sectional view along the line E-E. Figure 5 is a structural illustration of the support, (a) is its bottom view; (b) is a section along the D-D line; (c) is a section along the C-C line. Figure 6 is an explanatory diagram of the structure of the slider, (a) is its top view; (b) is a section view along the line A-A; (c) is a section view along the line B-B. Fig. 7 is an explanatory diagram of the hinge of the original press plate in the closed state. Fig. 8 is an explanatory diagram; illustrating the relationship between the supporting torque of the original pressing plate and the weight moment of the original pressing plate when the hinge is facing 0 degrees on the closed side of the supporting member. Figure 9 is an explanatory diagram of the state where the hinge stops at 60 degrees when it moves toward 0 degrees within the first opening and closing angle range, (a) is a sectional view of the first actuating cam part; (b) is a sectional view of the second actuating cam part Sectional view. Figure 10 is an explanatory diagram of the state where the hinge stops at 20 degrees when it moves toward 0 degrees within the first opening and closing angle range, (a) is a sectional view of the first actuating cam part; (b) is a sectional view of the second actuating cam part Sectional view. Fig. 11 is an explanatory view of the hinge switching from the first opening and closing angle range to the second opening and closing angle range, (a) is a sectional view of the first actuating cam part; (b) is a sectional view of the second actuating cam part. Figure 12 is an explanatory diagram of the state where the hinge stops at 4 degrees when the second opening and closing angle range moves toward 0 degrees, (a) is a sectional view of the first actuating cam part; (b) is a sectional view of the second actuating cam part picture. Figure 13 is an explanatory diagram of the state where the hinge stops at 0 degrees when the second opening and closing angle range moves toward 0 degrees, (a) is a sectional view of the first actuating cam part; (b) is a sectional view of the second actuating cam part picture.

10: hinge

11: Compression coil spring

5: Mounting parts

5a: box part

5b: Mounting part

5c: Rear panel

5d: stop part

5e: Internal thread part

5i: stopper

6: Hinge shaft

6a: Mounting hole

6b: Ring groove

6c: ring piece

6d: head

6e: Through hole

7: Support piece

7a: Connecting part

7b: Mounting sheet

7c: Mounting hole

7d: Support Department

7e: Actuating cam part

7i: end face

8: Slider

8a: Slide body

8e: Pressed cam part

8h: Sliding surface under pressure

8j: guide groove

D1: The first pressure cam part

D2: Second pressure cam part

Claims (8)

A hinge, which connects an opening and closing body with respect to a device body so that it can be opened and closed, the hinge includes: a mounting part, which is installed on the side of the device body, and has a box part with an open upper part; A supporting part, which is assembled to the mounting part through a hinge shaft to be able to rotate, and supports the opening and closing body; a slider that slides up and down inside the box; and A compression coil spring is elastically arranged between the sliding part and the mounting part; Wherein, the supporting member has a first actuating cam portion and a second actuating cam portion that protrude toward the box portion and are parallel; The slider has a first pressure-receiving cam portion that is in pressure contact with the first actuating cam portion, and a second pressure-receiving cam portion that is in pressure contact with the second actuating cam portion; The first actuating cam portion and the first pressure receiving cam portion form a first torque curve within a first opening and closing angle range of the installation part and the support part; The second actuating cam portion and the second pressing cam portion form a second torque curve within a second opening and closing angle range of the installation part and the support part. In the hinge according to claim 1, the first actuating cam portion and the first pressure receiving cam portion are separated from each other within the second opening and closing angle range. In the hinge according to claim 2, the second actuating cam portion and the second pressure receiving cam portion are separated from each other within the first opening and closing angle range. In the hinge described in claim 1, the first actuating cam portion and the first pressure cam portion form a first peak value of a supporting torque within the first opening and closing angle range, and the supporting torque is greater than the opening and closing angle. The weight moment of the whole body is large; the second actuating cam part and the second pressure cam part form a second peak value of a supporting torque within the second opening and closing angle range, and the supporting torque is more continuous than the first The weight moment of the opening and closing body at the peak value is small. In the hinge according to claim 1, the second actuating cam portion protrudes outside the support member in the diameter direction centered on the hinge axis, and protrudes more than the first actuating cam portion. As for the hinge described in claim 5, the second actuating cam part includes a lifting surface and a sliding surface, and the lifting surface is pressed down as the support member rotates toward 0 degrees within the second opening and closing angle range The sliding part is used to increase the compression of the compression coil spring; the sliding surface is continuous with the lifting surface to slide the second actuating cam part and the second compression cam part to reduce the compression of the compression coil spring. As for the hinge described in claim 6, the second pressure-receiving cam portion has a pressure-receiving sliding surface facing the hinge shaft side in an up-and-down direction, and the sliding surface of the second actuating cam portion is tied to the second opening. As the supporting member rotates toward 0 degree within the range of the full angle, it faces the pressed sliding surface and begins to slide. A business machine, which is provided with the hinge according to any one of Claims 1 to 7 between the device body and the original pressing plate.

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