Hinge devices and office equipment using these hinge devices

Abstract

To provide a hinge device that is constituted by using inexpensive materials and allows easy ground connection between a machine body side and a lid body side during assembly of a business machine, and the business machine.SOLUTION: A hinge device has: an attachment case 21; a support member 22 that supports a lid body attached to the attachment case in an openable and closable manner with a hinge shaft 23 made of a conductive material; a frame member 20 made of a conductive material that is accommodated in the attachment case while connected with the hinge shaft; a slider 23 that is accommodated in the attachment case in a slidable manner; an elastic member 25 that is elastically provided between the slider and the attachment case; and an operation cam part 22c that is provided on the support member in pressure contact with a pressure receiving cam part 24c provided at an apex of the slider. The hinge device further has a conductive cord 27 that is connected with the lid body and in conduction with the hinge shaft, and an electrode member 26 that is provided outside a bottom part of the attachment case and connected with the frame member via an attachment screw 26b made of a conductive material. The electrode member is brought into electrical contact with a device body when the attachment case is inserted into an attachment hole.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a hinge device suitable for use in, for example, a small-sized home copier or a small-sized multifunction device The matter office equipment When attaching the document pressure plate to the main body of the device in a way that allows it to be opened and closed and an office equipment using this hinge device.

Background Art

[0002] Various hinge devices have been proposed for connecting an apparatus main body of an office equipment such as a small-sized copier and a document pressing plate (hereinafter referred to as a lid) attached to the apparatus main body so as to be openable and closable. Among them, the one described in Patent Document 1 below is known. This hinge device includes an upper-open mounting case detachably attached to a mounting hole provided in the apparatus main body, a support member that supports a lid that is attached to the mounting case via a hinge shaft so as to be openable and closable, a slider slidably accommodated in the mounting case, an elastic member elastically provided between the slider and the mounting case, and an operating cam portion provided on the support member that is pressed against a pressure receiving cam portion provided on the top of the slider.

[0003] In the case of such a hinge device, Mounting case (also called mounting component) either one or both of the mounting case and the support member are made of a synthetic resin of a non-conductive material such as, for example, ABS resin. In such a case, it is necessary for the hinge device to Main unit of the device have a function of commonly grounding the apparatus main body and the lid.

[0004] Therefore, in the hinge device of Patent Document 1, a frame member (sheet metal case) made of a conductive material accommodated in the mounting case (mounting member) is grounded to a ground member provided on the apparatus main body through a second electrode member provided to be exposed on the surface of the mounting case, while a first electrode member provided to be exposed on the surface of the support member by being electrically connected to the lid is brought into contact with the second electrode member so as to be relatively rotatable.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2018-5015 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] In the hinge device described in Patent Document 1, a second electrode member is provided along the surface of the mounting case, a first electrode member is provided along the surface of the support member, and the second electrode member and the first electrode member must be assembled to maintain contact and be able to rotate relative to each other, which increases both the parts cost and the assembly cost.

[0007] Therefore, the objective of the present invention is to reduce component costs and assembly costs, Main unit of the device The objective is to provide a hinge device that allows the side and the lid to be connected to earth, as well as office equipment using this hinge device. [Means for solving the problem]

[0008] To achieve the above-mentioned objective, the hinge device according to claim 1 of the present invention is a hinge device that connects an office equipment device body and a lid attached to the device body in an openable and closable manner, comprising: an open-top mounting case that is detachably attached to a mounting hole provided in the device body; a support member that supports the lid, which is detachably attached to the mounting case via a hinge shaft made of a conductive material; a frame member made of the same conductive material that is housed inside the mounting case and connected to the hinge shaft; a slider that is slidably housed inside the mounting case; and the slider and the Frame members The device comprises an elastic member provided between the slider and an operating cam portion provided on the support member and pressed against a pressure-receiving cam portion provided on the top of the slider, and further comprises a conductive cord connected to the hinge shaft and the lid, and an electrode member provided on the outside of the bottom of the mounting case and connected to the frame member via a mounting screw made of conductive material, wherein the electrode member makes electrical contact with the main body of the device when the mounting case is inserted into the mounting hole.

[0009] Next, the hinge device according to claim 2 of the present invention is characterized in that a pair of sliding parts are provided on the side surface of the slider to slide against the side plates on both sides of the frame member, a protruding part in the sliding direction is provided in the middle of the pair of sliding parts of the slider, and a housing groove is provided on the inside of the mounting case to accommodate the protruding part of the slider and guide it in the sliding direction.

[0010] Next, the hinge device according to claim 3 of the present invention is characterized by having friction parts that are provided so as to protrude symmetrically inward from the side plates on both sides of the frame member and that press against and rub against the side surface of the slider.

[0011] Next, the hinge device according to claim 4 of the present invention is characterized by having a conductive promoting member that passes through the hinge shaft and is held between one side plate of the frame member and the inner wall of the mounting case, thereby electrically bypassing the hinge shaft and the side plate.

[0012] The office equipment according to claim 5 of the present invention is characterized in that a lid can be opened and closed relative to the main body of the device using a hinge device described in any one of claims 1 to 4. [Effects of the Invention]

[0013] As described above, the present invention ensures conductivity as an earth connection circuit for the electrode member, frame member, and hinge shaft with a simple configuration, even if the mounting case and support member, which are rotatably connected to each other via a hinge shaft, are made of a non-conductive synthetic resin. Therefore, it can be constructed using inexpensive materials and is suitable for use in the assembly of office equipment. Main unit of the device The side and the lid side can be easily connected electrically. Continuity We can provide hinge devices and office equipment that can perform this operation.

[0014] According to the hinge device according to claim 2, since the convex strip portion of the slider is guided in the sliding direction by the accommodation groove of the attachment case, it is possible to avoid the center deviation and inclination of the slider accompanying the movement of the slider.

[0015] According to the hinge device according to claim 3, the angular range in which friction is applied from the attachment case to the slider can be controlled by the position and length in the sliding direction of the friction portion provided on the frame member. Further, the magnitude of the friction can be controlled by the width and height of the friction portion provided on the frame member.

[0016] According to the hinge device according to claim 4, the conduction between the relatively thick and hard hinge shaft and the frame member is ensured through the relatively thin and soft conductive promoting member, Main unit of the device and the side and the lid body side can be stably grounded. According to the office equipment using the hinge device of claim 5, component costs and assembly costs can be reduced.

Brief Description of the Drawings

[0017] [Figure 1] It is a perspective view of a copying machine as an example of an office machine using the hinge device according to the present invention. [Figure 2] It is a partial cross-sectional view of an office machine including a hinge device in a state where the lid body of the office machine shown in FIG. 1 is opened. [Figure 3] It is a partial cross-sectional view of an office machine including a hinge device in a state where the lid body of the office machine shown in FIG. 1 is closed. [Figure 4] It is an overall perspective view of the hinge device in a state where the hinge device is looked up obliquely from below with the conductive cord shown in FIG. 3 removed. [Figure 5] It is an exploded perspective view of the hinge device shown in FIG. 4. [Figure 6] It is a cross-sectional view of a cross-section parallel to the hinge shaft passing through the center of the hinge shaft in the hinge device shown in FIG. 4. [Figure 7] It is an explanatory view of the configuration of the frame member shown in FIG. 5, where (a) is a side view and (b) is a cross-sectional view parallel to the hinge shaft passing through the center of the hinge shaft. [Figure 8] It is an explanatory view of the configuration of the conductivity promoting member shown in FIG. 5, where (a) is a perspective view and (b) is a partial perspective view. [Figure 9] It is an explanatory view of the configuration of the electrode member shown in FIG. 5, which is a perspective view looking down on the electrode member from above. [Figure 10] It is an explanatory view of the guide structure of the slider and the positioning structure of the frame member, which is a plan view of the mounting case. [Figure 11] It is an explanatory view of the operation of the rubbing portion of the frame member shown in FIG. 7 in the state where the lid body is open, which is a longitudinal sectional view of the hinge device in the state where the lid body is open. [Figure 12] It is an explanatory view of the operation of the rubbing portion of the frame member shown in FIG. 7 in the state where the lid body is closed, which is a longitudinal sectional view of the hinge device in the state where the lid body is closed.

Embodiments for Carrying out the Invention

[0018] Hereinafter, the hinge device according to the present invention and the office equipment provided with the hinge device will be described in detail based on the attached drawings. In each of the attached drawings, members with the same reference signs indicate members having the same or equivalent configurations and functions. Further, the present invention is not limited to the configuration of the illustrated embodiments, but encompasses various embodiments within the scope described in the claims.

[0019] FIG. 1 is a view showing a copying machine as an example of office equipment 1 using the hinge devices 2 and 2 according to the present invention. FIGS. 2 to 3 are enlarged sectional views of the state where the hinge device 2 according to the present invention is attached to the office equipment 1. The office equipment 1 Main unit of the device 11, and a lid body 12 that presses a document or the like placed on the contact glass 13 provided on the upper surface of this Main unit of the device 11 against the contact glass 13 side, and hinge devices 2 and 2 that connect the lid body 12 Main unit of the device to 11 so as to be openable and closable. Reference numeral 14 is an operation panel.

[0020] Examples of office equipment 1 include photocopiers, printers, facsimile machines, scanners, etc., with photocopiers being particularly preferred. However, the present invention is not limited to such specific examples of office equipment. In the examples, the left and right hinge devices 2, 2 of office equipment 1 are identical. However, in photocopiers that open and close a lid 12 with an automatic document feeder, it is common practice to differentiate the configuration, size, and materials of the hinge devices on the left side, which is the heavier side with the automatic document feeder attached, and the right side, which is the lighter side.

[0021] Figures 2 to 10 show one embodiment of the hinge device 2, 2 according to the present invention. Since they have the same configuration, only one will be described. The hinge device 2 is Main unit of the device The assembly comprises a synthetic resin mounting case 21 with an open top that is removablely attached to a mounting hole 11a provided in 11, a support member 22 made of the same synthetic resin that supports a lid 12 that is attached to the mounting case 21 so as to be openable and closable via a hinge shaft 23 made of a conductive material, a frame member 20 made of the same conductive material housed inside the mounting case 21 and connected to the hinge shaft 23, a slider 24 slidably housed inside the mounting case 21, an elastic member 25 elastically provided between the slider 24 and the mounting case 21, and an operating cam portion 22c provided on the support member 22 that is pressed against a pressure receiving cam portion 24c provided on the top of the slider 24.

[0022] As shown in Figure 5, the mounting case 21 consists of a cylindrical case portion 21a with an open top and a bottom portion 21b, and a pair of side plates 21c and 21d projecting upward from both sides of the case portion 21a at predetermined intervals, with a flange portion 21e positioned around the upper part of the outer circumference of the case portion 21a. Each side plate 21c and 21d is provided with a deformed connecting hole 21f and a circular connecting hole 21g, both sharing a common axis, into which a hinge shaft 23 is inserted.

[0023] As shown in Figures 2 and 3, the mounting case 21 has a portion of the case part 21a. Main unit of the deviceThe mounting case 21 is detachably attached by inserting it into a mounting hole 11a provided vertically on the upper rear of 11. However, the configuration of this mounting case 21 is not limited to that of the embodiment. The retaining projection 21j provided on the lower rear end side of the case portion 21a acts as a stopper to prevent the mounting case 21 from coming out of the mounting hole 11a when copying a thick original such as a book placed on the contact glass 13, which is necessary to lift the entire hinge device 2 upward so that the top of the thick original can be horizontally covered. The indicator symbol 11f is the guide groove of the retaining projection 21j, and 11g is the stopper portion. Note that the case portion 21a Main unit of the device When inserting into the mounting hole 11a of 11, tilt the case portion 21a and use the notch of the conical surface 21p Mounting holes The inlet 11b of 11a is passed through. Then the case section 21a is made vertical. Mounting holes When placed in position 11a, the conductive member 28 elastically contacts the electrode member 26, as will be described later.

[0024] As shown in Figures 2 to 5, the support member 22 consists of a main body 22a and a pair of mounting parts 22b, 22b that protrude horizontally from both sides of the main body 22a. The mounting parts 22b, 22b are attached to the cover 12 via mounting screws 22p, 22p, .... An operating cam part 22c is also provided on the lower side of the main body 22a. The mounting case 21 and the support member 22 are rotatably connected to each other by passing a hinge shaft 23 through deformable connecting holes 21f and circular connecting holes 21g provided in the side plates 21c, 21d of the mounting case 21 and a circular connecting hole 22d provided in the main body 22a of the support member 22. An elastic member 25 made of a compression coil spring is housed inside the case part 21a, and the upper part of a cylindrical slider 24 placed over this elastic member 25 is in constant pressure contact with the operating cam part 22c of the support member 22. The designation 22n indicates mounting holes for attaching the mounting portion 22b of the support member 22 to the cover 12.

[0025] As shown in Figure 6, the hinge shaft 23 is composed of a circular shaft portion 23a, a deformable shaft portion 23b provided following the circular shaft portion 23a, and a head portion 23c provided following the deformable shaft portion 23b. The circular shaft portion 23a and the deformable shaft portion 23b of the hinge shaft 23 are passed through the deformable connecting holes 21f and circular connecting holes 21g provided in the side plates 21c and 21d of the mounting case 21 and the circular connecting hole 22d of the support member 22, and the end of the circular shaft portion 23a is crimped to prevent it from coming out in the axial direction. The deformable shaft portion 23b of the hinge shaft 23 and the deformable connecting holes 21f provided in the side plate 21c of the mounting case 21 are engaged with each other, and the hinge shaft 23 does not rotate with the rotational movement of the support member 22.

[0026] As shown in Figure 7, the frame member 20 is made by press-forming a rigid metal plate, such as SUS, and has a bottom plate portion 20c and a pair of side plates 20b, 20b formed by bending upwards from both sides of the bottom plate portion 20c. The recess 21k shown in Figure 10 holds the contour of the bottom plate portion 20c of the frame member 20 and positions the frame member 20 in the mounting case 21.

[0027] As shown in Figure 6, the frame member 20 reduces the load on the mounting case 21 by bypassing the tensile force exerted by the compressed elastic member 25 between the hinge shaft 23 and the bottom plate portion 20c of the mounting case 21. The frame member 20 is housed within the case portion 21a of the mounting case 21 and is held within the case portion 21a by passing the hinge shaft 23 through connecting holes 20e, 20e provided on the upper parts of the side plates 20b, 20b. The elastic member 25, which is made of a compressed coil spring, and the slider 24, which is placed over the elastic member 25, are housed within this frame member 20, and the slider 24 is in constant pressure contact with the operating cam portion 22c of the support member 22.

[0028] The slider 24 is provided with a pair of sliding parts 24b, 24b on its side that rub against the side plates 20b on both sides of the frame member 20, and a protruding part 24d in the sliding direction is provided between the pair of sliding parts 24b, 24b of the slider 24. As shown in Figure 10, a housing groove 21i is provided inside the mounting case 21 to accommodate the protruding part 24d of the slider 24 and guide it in the sliding direction. As a result, the slider 24 is held vertically within the case part 21a, and the left and right sliding parts 24b, 24b are balanced and stable, rubbing against the side plates 20b, 20b on both sides with the protruding part 24d as the center.

[0029] As shown in Figure 7(b), friction parts 20f, 20f are provided, projecting symmetrically inward from the side plates 20b on both sides of the frame member 20. As shown in Figure 6, the friction parts 20f, 20f generate friction resistance by pressing against the side surface of the slider 24 and rubbing against it. For this reason, the lid 12 Main unit of the device This reduces the falling speed and impact on the contact glass 13 when 11 is accidentally dropped from above. Furthermore, in the commonly designed hinge device 2, by replacing the frame member 20 with different sliding ranges and positions of the friction parts 20f, 20f, the feel of opening and closing the lid 12 can be set in various ways to suit the office equipment 1.

[0030] As shown in Figure 12, Main unit of the device When the lid 12 is closed relative to 11, the hinge device 2 is in a state where the operating cam portion 22c of the support member 22 compresses the elastic member 25 via the slider 24 due to the rotational torque generated around the hinge shaft 23 by the weight of the lid 12. At this time, the operating cam portion 22c pushes down the slider 24, increasing the amount of compression of the elastic member 25, and the force lifting the lid 12 is at its maximum.

[0031] Main unit of the deviceAs the lid 12 is opened from a closed position relative to 11, the hinge device 2 pushes the lid 12 upward in the opening direction via the support member 22 due to the repulsive force of the elastic member 25, thereby reducing the weight torque of the lid 12 and allowing it to be opened with relatively little force. Then, from a predetermined opening angle, the elasticity of the elastic member 25 becomes greater than the weight of the lid 12, causing the lid 12 to lift automatically. As shown in Figure 2, the protrusion 22e of the support member 22 contacts the stopper portion 21n provided on the upper edge of the case portion 21a of the mounting case 21, stopping the lid. As shown in Figure 11, when the lid 12 is open, the slider 24 rises along with the rise of the operating cam portion 22c, so the amount of compression of the elastic member 25 is reduced, minimizing the force required to lift the lid 12. When closing the opened lid 12, the hinge device 2 can cushion the sudden closing of the lid 12 by the elasticity of the elastic member 25.

[0032] Next, the grounding connection circuit of the hinge device 2 will be described. In this embodiment, the mounting case 21 is made of synthetic resin, the support member 22 is made of synthetic resin, the hinge shaft 23 is made of stainless steel, the frame member 20 is made of stainless steel, the slider 24 is made of synthetic resin, and the elastic member 25 is a steel compression coil spring. Therefore, due to the triboelectricity of each component, the lid 12 and Main unit of the device During step 11, unintended high voltage or short-circuit noise may occur. Therefore, the hinge device 2 is provided with an earth connection circuit 30 inside the case portion 21a, which utilizes the existing frame member 20 as a conductive path.

[0033] The ground connection circuit 30 includes a conductive cord 27 that is electrically connected to the hinge shaft 23 and connected to the lid 12, and an electrode member 26 that is provided on the outside of the bottom of the mounting case 21 and connected to the frame member 20 via a conductive mounting screw 26b, and the mounting case 21 Main unit of the device When inserted into the mounting hole 11a of 11 Mounting holes The part located at the bottom of the inside of 11a Main unit of the deviceThe conductive member 28 and electrode member 26, which are electrically connected to 11, are configured to make electrical contact. In other words, the ground connection circuit 30 consists of a hinge shaft 23 to which a conductive cord 27 is fixed at a non-rotating end, and an electrode member 26 provided on the lower surface of the mounting case 21 with its electrode surface exposed. to wo, The electrical connection is made via the frame member 20 inside the mounting case 21.

[0034] As shown in Figures 2 and 3, Mounting holes The inner bottom of 11a is Main unit of the device A conductive member 28 is provided that is electrically conductive with 11 and elastically contacts the electrode member 26. Note that in Figures 2, 3, 6, 11, and 12, the conductive member 28 is shown avoiding overlap with surrounding members, and the size and position of the conductive member 28 are not as shown. The conductive member 28 is not limited to the illustrated embodiment, but as an example, the electrode body 28a, which is made of a thin stainless steel plate, is secured by a screw 28b Main unit of the device Attach to 11, Main unit of the device It is soldered to the grounding cord 28c connected to the metal chassis 11. The hinge device 2 and the conductive member 28 are configured such that when the mounting case 21 is inserted into the mounting hole 11a, the conductive member 28 makes electrical contact with the electrode member 26. The conductive member 28 follows the upward and downward movement of the mounting case 21 due to the spring force of the electrode body 28a, and is able to absorb the lifting of the mounting case 21 by a predetermined distance, thereby maintaining contact with the electrode member 26.

[0035] As shown in Figure 9, the electrode member 26 is formed by pressing a conductive copper plate into a circular shape, simultaneously creating a thin disc-shaped electrode 26c, a central through hole 26a, and a conical surface 26d that receives the head of the countersunk screw mounting thread 26b. As shown in Figure 6, the electrode member 26 is provided on the outside of the bottom of the mounting case 21, and forms a flat electrode surface that accommodates the head of the countersunk screw mounting thread 26b inserted into the through hole 26a in the conical surface 26d.

[0036] As shown in Figure 6, the frame member 20 is housed within the case portion 21a of the mounting case 21, and the circular shaft portion 23a of the hinge shaft 23 is passed through the connecting holes 20e, 20e of the side plates 20b, 20b, holding the hinge shaft 23 within the case portion 21a, thereby electrically connecting the hinge shaft 23 to the electrode member 26. The electrode member 26 is fixed to the mounting case 21 and electrically connected to the frame member 20 by tightening the mounting screws 26b of conductive material countersunk screws into the female threads 20d of the bottom plate portion 20c. The hinge shaft 23 is biased by the elastic member 25 and electrically connected to the frame member 20 by pressing its circular shaft portion 23a against the upper edges of the connecting holes 20e, 20e.

[0037] As described above, the hinge shaft 23 is fixed to the mounting case 21 by inserting its deformed shaft portion 23b into the deformed connecting hole 21f, and the frame member 20 is fixed to the inside of the mounting case 21. Therefore, when the lid 12 is opened and closed, the hinge shaft 23 does not rotate relative to the frame member 20. As a result, this configuration basically prevents contact problems and noise caused by friction between the hinge shaft 23 and the frame member 20.

[0038] The conductive cord 27 has crimp terminals 27b and 27c fixed to both ends of a flexible cord body 27a. The crimp terminal 27b at one end of the conductive cord 27 is fixed to the female thread 23e at the end of a hinge shaft 23 whose rotation is fixed to the mounting case 21 by inserting the deformable shaft portion 23b into the deformable connecting hole 21f described above, and then tightening a washer 23f and screw 23g. As a result, even when the cover 12 is rotated, one end of the conductive cord 27, including the crimp terminal 27b, maintains a constant position, making it difficult for the conductive cord 27 to fatigue at the crimp terminal 27b side or to become tangled with the surroundings. Note that the connection by crimp terminal 27b may be replaced with welding, soldering, or connector connection using a flexible wire.

[0039] In this embodiment, the crimp terminal 27c at the other end of the conductive cord 27 is secured to the metal part of the cover 12 by tightening a screw 23g. The metal part of the cover 12 could be the metal chassis of the cover 12, but the cord body 27a of the conductive cord 27 can be arbitrarily selected due to its flexibility and freedom of length, and may also be a circuit board or motor (not shown) housed in the cover 12.

[0040] As shown in Figure 6, the hinge shaft 23 is electrically connected to the frame member 20 with its circular shaft portion 23a pressed against the upper edges of the connecting holes 20e, 20e. The conductive promoting member 29 is held in place by being sandwiched between one side plate 20b of the frame member 20 and the inner wall of the mounting case 21, passing through the hinge shaft 23 and electrically bypassing the side plate 20b. It has been confirmed that the presence of the conductive promoting member 29 makes it less likely for noise to be generated in the ground potential due to vibrations and shocks of the lid 12.

[0041] As shown in Figure 8(a), the conductivity promoting member 29 is formed by press-forming a thin conductive copper plate, has a through hole 29a in the center of its U-shaped outer form, a rotation restricting portion 29b at the top, and a protrusion 29c formed on the lower edge of the through hole 29a.

[0042] As shown in Figures 2 and 3, the conductive promoting member 29 has its rotation restricted by engaging its rotation restricting portion 29b with the side plate 21c of the mounting case 21. As shown in Figure 6, Conductivity promoting member 29 The protrusion 29c is held in place by the stepped portion 23d of the circular shaft portion 23a and the deformed shaft portion 23b, preventing it from losing its shape. The protrusion 29c eliminates play and looseness in the conductive promoting member 29, ensuring reliable electrical contact with the hinge shaft 23. [Industrial applicability]

[0043] By having the above configuration, the present invention allows for a simple configuration in which a mounting member and a support case made of non-conductive material are rotatably connected via a hinge shaft. Main unit of the deviceThis hinge device is suitable for use as a hinge for office equipment that allows for ground connection of the lid, and also for use in office equipment using this hinge device alone or in pairs. [Explanation of symbols]

[0044] 1 Office equipment 2. Hinge device 11 Main unit of the device 11a Mounting hole 12 Lid 13 Contact Glasses 20 Frame members 20b side plate 20d female thread 20e connection hole 20f Friction part 21. Mounting case (mounting component) 21i housing groove 22 Support member 22c Operating cam section 23 Hinge shaft 23a Circular shaft portion 23b Deformed shaft section 23e Female thread 24 Sliders 24b Sliding part 24c pressure-receiving cam section 24d Convex part 25 Elastic members 26 Electrode Member 27 Conductive cord 28 Conductive members 29 Conductivity-promoting member 30. Ground connection circuit

Claims

1. A hinge device that connects the main body of an office equipment device and a lid attached to the main body of the device in a manner that allows them to be opened and closed, An open-top mounting case that is detachably attached to a mounting hole provided in the main body of the device, A support member that supports the lid, which is attached to this mounting case so as to be openable and closable via a hinge shaft made of conductive material, A frame member made of the same conductive material is housed within the mounting case and connected to the hinge shaft, A slider slidably housed within the aforementioned mounting case, An elastic member is provided between this slider and the frame member, The slider has an operating cam portion that is pressed against a pressure-receiving cam portion provided at the top of the slider and is attached to the support member, Furthermore, a conductive cord is connected to the hinge shaft and then to the lid, The mounting case has an electrode member provided on the outer bottom and connected to the frame member via a mounting screw made of a conductive material, A hinge device characterized in that the electrode member makes electrical contact with the main body of the device when the mounting case is inserted into the mounting hole.

2. A pair of sliding parts are provided on the side surface of the slider, which slide against the side plates on both sides of the frame member. A protruding ridge in the sliding direction is provided in the middle of the pair of sliding parts of the slider. The hinge device according to claim 1, characterized in that a housing groove for accommodating the protruding portion of the slider and guiding it in the sliding direction is provided on the inside of the mounting case.

3. The hinge device according to claim 1, characterized in that it is provided so as to protrude symmetrically inward from the side plates on both sides of the frame member and has friction parts that press against and rub against the side surface of the slider.

4. The hinge device according to claim 1, characterized in that a conductive promoting member is provided which passes through the hinge shaft and is sandwiched and held between one side plate of the frame member and the inner wall of the mounting case, thereby electrically bypassing the hinge shaft and the side plate.

5. Office equipment characterized in that a lid can be opened and closed relative to the main body of the device using a hinge device as described in any one of claims 1 to 4.

Images