JP2017122482A - Lid body opening/closing device and various equipment comprising same lid body opening/closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid body opening/closing device that maintains functions of a conventional known lid body opening/closing device, and then further can have simple constitution and suppress manufacturing costs low.SOLUTION: A lid body opening/closing device consists of: a fitting member 51 fitted to a rear upper end part of a device body 2 of various equipment 1, and provided with a leaf spring accommodation part 51a; a support member 52 supporting a lid body 3 fitted rotatably above the fitting member through a hinge shaft 53; a cam part 52f provided to the support member; and a leaf spring 54 accommodated and fixed in the leaf spring accommodation part of the fitting member and pressing an operation part 54c provided on the side of a free end 54b thereof against the cam part.SELECTED DRAWING: Figure 5

Description

  INDUSTRIAL APPLICABILITY The present invention is a lid suitable for use in opening and closing lids of office machines, other toilets and equipment used for production facilities (hereinafter referred to as various devices) such as copying machines, multifunction machines, and printing machines. The present invention relates to an opening / closing device and various devices including the lid opening / closing device.

2. Description of the Related Art Conventionally, a lid opening / closing device having a relatively simple structure that is provided between an apparatus main body and a lid body of various devices and connects the lid body to the apparatus main body so as to be opened and closed. The lid attached to office equipment such as a multifunction machine, a multifunction machine, or a printing machine is placed on a contact glass provided on the main body of the machine, and when the document is copied or printed, the lid is closed and the original is contacted. In order to be able to be crimped onto glass and to open the lid without feeling its weight when opening the lid from its calm state, and to be able to stop and hold the lid at an intermediate opening / closing angle, Those represented by those described in 2 are known.
The lid opening / closing device of this known configuration is described by replacing its member name with the member name of the lid opening / closing device according to the present invention, and an attachment member that also serves as a spring case attached to the device main body side in the vertical direction, A support member that supports the lid body rotatably attached to the upper end portion side of the attachment member via a hinge shaft, and a spring of the attachment member that doubles as a cam portion provided on the support member and the spring case A compression coil spring housed in a case and elastically contacted between the cam portion and a compression coil spring placed over the compression coil spring and slidable vertically between the compression coil spring and the cam. It consists of a slider.

JP 2012-57663 A Japanese Patent Laid-Open No. 2015-135140

  This kind of known lid opening / closing device is relatively inexpensive even for office machines called copiers or multifunction machines, and the lid is also relatively light without an automatic document feeder. It is used to open and close the lid. However, demands for cost reduction in recent years are severe, and a cheaper lid opening / closing device is required.

  An object of the present invention is to provide a lid opening / closing device that is simple in structure and can be manufactured at a low cost while maintaining the functions of a conventionally known lid opening / closing device in consideration of such demands. To do.

  In order to achieve the above object, the invention of claim 1 of the present application is a lid body opening / closing device that is provided between an apparatus main body and a lid body of various devices and connects the lid body to the apparatus main body so as to be openable and closable. And a support member attached to the rear upper end of the apparatus main body and provided with a leaf spring accommodating portion, and a support member that supports the lid body rotatably attached to the upper part of the attachment member via a hinge shaft. A member, a cam portion provided on the support member, and a leaf spring which is housed and fixed in the leaf spring housing portion of the mounting member, and an action portion provided on the free end side thereof is brought into pressure contact with the cam portion. It is characterized by comprising.

  In this case, the present invention is characterized in that an elastic force adjusting means for adjusting a pressing force that the plate spring applies to the cam portion of the support member is provided between the mounting member and the plate spring.

  According to the present invention, the plate spring is configured to have a substantially inverted L-shaped longitudinal section, and the elastic force adjusting means is arranged so that one end of the plate spring is vertically connected to the bottom plate of the mounting member via an adjusting screw. It is provided so as to be movable in the direction.

  According to the present invention, the plate spring is configured to have a substantially U-shaped vertical cross section, and one end side of the plate spring is locked to the back plate of the mounting member. By making the adjustment screw attached to the attachment member abut on the side, the curvature of the bent portion is adjusted by the elasticity adjusting means.

  The present invention further comprises a synthetic resin molding in which the plate spring is configured to have a substantially U-shaped longitudinal section, and a plate spring accommodating portion in which the mounting member is matched to the curved shape of the plate spring is provided. The leaf spring is housed in the leaf spring housing portion.

  The present invention is further characterized in that a plurality of the leaf springs are provided in an overlapping manner.

  Furthermore, in the present invention, the leaf spring having a substantially U-shaped longitudinal section includes an elastic member having a circular section in its bent curved portion.

  The present invention is characterized in that various devices include the lid opening / closing devices.

  According to the present invention having the above configuration, even if a leaf spring that can be provided at low cost is used instead of the compression coil spring and the slider is omitted, the end portion of the leaf spring is directly brought into pressure contact with the cam portion. Even in the configuration, a relatively lightweight lid opening / closing device capable of exhibiting the same functions as those conventionally known can be provided. In this case, if a resilient force adjusting means capable of adjusting the pressing force applied by the leaf spring to the cam portion is further provided, the rotational torque of the support member can be easily finely adjusted, and a more convenient lid opening / closing device is provided. It is something that can be done.

It is the perspective view which opened and looked at the cover of the copying machine which is an example of the various apparatus which attached the cover opening / closing apparatus which concerns on this invention. In Example 1 of the cover body opening / closing apparatus which concerns on this invention, it is the perspective view which showed the state whose support member is horizontal (0 degree). It is the perspective view which showed the state which the support member of the cover body opening / closing apparatus shown in FIG. 2 rotated 90 degrees with respect to the attachment member. It is a disassembled perspective view of the cover body opening / closing apparatus shown in FIG. FIG. 3 is a longitudinal sectional view of the lid opening / closing device shown in FIG. 2 in a state attached to a copying machine. FIG. 5 is a longitudinal sectional view showing a state in which a support member of the lid opening / closing device shown in FIG. 4 is rotated by 45 ° with respect to an attachment member. FIG. 5 is a longitudinal sectional view showing a state in which a support member of the lid opening / closing device shown in FIG. 4 is rotated by 90 ° with respect to an attachment member. The attachment member of the cover body opening / closing apparatus shown in FIG. 2 is shown, (a) is the side view, (b) is the top view. The leaf | plate spring of the cover body opening / closing apparatus shown in FIG. 2 is shown, (a) is the perspective view, (b) is the side view. In Example 2 of the cover body opening / closing apparatus which concerns on this invention, it is the perspective view which showed the state which the support member rotated 90 degrees with respect to the attachment member. It is a disassembled perspective view of the cover body opening / closing apparatus shown in FIG. It is the longitudinal cross-sectional view which showed the state which the support member of the cover body opening / closing apparatus shown in FIG. 10 rotated 45 degrees with respect to the attachment member. It is the longitudinal cross-sectional view which showed operation of the elastic force adjustment means of the pressing force of the leaf | plate spring of the cover body opening / closing apparatus shown in FIG. The attachment member of the cover body opening / closing apparatus shown in FIG. 10 is shown, (a) is the perspective view, (b) is the side view. It is a disassembled perspective view of Example 3 of the cover body opening / closing apparatus which concerns on this invention. It is the longitudinal cross-sectional view which showed the state which the support member of the cover body opening / closing apparatus shown in FIG. 15 rotated with respect to the attachment member. It is a disassembled perspective view of Example 4 of the cover body opening / closing apparatus which concerns on this invention. It is the longitudinal cross-sectional view of the state which assembled the cover body opening / closing apparatus shown in FIG. FIG. 17 shows a mounting member of the lid opening / closing apparatus shown in FIG. 17, (a) is a perspective view thereof, (b) is a plan view thereof, (c) is a rear view thereof, and (d) is a side sectional view thereof. It is a disassembled perspective view of Example 5 of the cover body opening / closing apparatus which concerns on this invention. It is a longitudinal cross-sectional view of the state which assembled the cover body opening / closing apparatus shown in FIG. It is a disassembled perspective view of Example 6 of the cover body opening / closing apparatus which concerns on this invention. It is a longitudinal cross-sectional view of the state which assembled the cover body opening / closing apparatus shown in FIG.

In the following, a preferred embodiment of the present invention will be described for a copying machine, a multifunction machine or a printing machine. As described above, the lid opening / closing device according to the present invention is limited to these office machines. It can be applied to a toilet seat lid opening and closing device of a Western-style toilet and other production equipment. FIG. 1 shows an apparatus main body 2 of a copying machine 1 which is an example of office equipment among various devices using lid opening / closing devices 5 and 5 according to the present invention shown in the embodiments described below. It is the figure which showed a part, the cover body 3, and other main components. As shown in the drawing, a pair of lid opening / closing devices 5 and 5 are usually used, and there are those having the same configuration on the left and right, and others having different configurations on the left and right. In the present invention, one of them will be described.
Further, a contact glass 4 which is another main component is provided on the upper surface of the apparatus main body 2. A document (not shown) is placed on the contact glass 4, and the document is placed on the contact glass 4 side by the lid 3. Crimping, copying and printing are performed.

  The lid opening / closing device 5 according to the first embodiment of the present invention shown in FIGS. 2 to 9 will be described. The lid opening / closing device 5 includes an attachment member 51 attached to the apparatus main body 2 side, and the attachment member 51. A support member 52 rotatably attached to the support member 52 via a hinge shaft 53, a leaf spring 54 accommodated in the attachment member, a cam portion 52f provided on the support member 52 side, and elasticity against the leaf spring 54 The elasticity adjusting means 55 in this embodiment is constituted by an adjusting screw 56 in which a leaf spring 54 is attached to the bottom plate 51 i of the attachment member 51.

  As shown in FIG. 5, the attachment member 51 is attached to the upper end of the rear portion of the apparatus main body 2 of the copying machine 1 in the state of being inserted in the vertical direction in the attachment hole 6 provided in the vertical direction. . The attachment member 51 is provided with a leaf spring accommodating portion 51a, and a leaf spring 54 is accommodated therein. A support member 52 is rotatably attached to an upper portion of the attachment member 51 via a hinge shaft 53, and the support member 52 is connected to the plate spring 54 in the plate spring accommodating portion 51a. The cam part 52f is provided in the part which contacts. The leaf spring 54 in the first embodiment has a substantially inverted L shape, and presses the surface of the cam portion 52f by bringing the side surface of the action portion 54c near the free end 54b into contact with the cam portion 52f. A predetermined rotational torque is applied to the support member 52.

  Further, the lid opening / closing device 5 of the present invention is provided with the elasticity adjusting means 55 including the adjusting screw 56 provided at the bottom of the mounting member 51, and the leaf spring 54 is applied to the cam portion 52 f of the support member 52. The rotational torque of the support member 52 can be adjusted by adjusting the pressure. That is, by changing the screwing amount of the adjusting screw 56, the distance between the mounting end 54a of the leaf spring 54 and the cam portion 52f is adjusted, and the pressing force applied to the cam portion 52f by the action portion 54c of the leaf spring 54 is adjusted. By adjusting, the rotational torque of the support member 52 can be adjusted. That is, the side surface of the action portion 54c near the free end 54b of the leaf spring 54 is brought into contact with the cam portion 52f, and the distance between the mounting end 54a, which is the other end, and the cam portion 52f is determined by the elasticity adjusting means 55. It is configured so that it can be adjusted.

  As shown in FIG. 5, the cam portion of the support member 52 with which the action portion 54c of the leaf spring 54 abuts until the state in which the lid 3 is closed from the closed state 3 to the 45 ° opened state as shown in FIG. By forming the radius between the surface of 52f and the hinge shaft 53 so as to gradually decrease, a gentle rotational torque in the opening direction is applied to the support member 52 by the pressing force of the leaf spring 54, and 30 ° In the range of 45 ° to 45 °, the lid 3 is configured to be stably held without falling naturally even if the hand is released from the lid 3. Next, as shown in FIG. 6, in a section where the lid 3 reaches a state opened 90 degrees as shown in FIG. 7 from a state where the lid 3 is opened 45 degrees, the surface of the cam portion 52 f and the hinge shaft 53 Since the radius between them is formed so as to rapidly decrease, the rotational torque in the opening direction with respect to the support member 52 increases rapidly, and the lid 3 is automatically opened to reach the 90 ° open state. In the state shown in FIG. 7, the stopper portion 52 h provided on the support member 52 reaches the contact portion 51 o at the upper end portion of the mounting member 51, and is stopped and held at this open position. When the lid 3 is closed, an operation opposite to the above is realized. As shown in FIG. 6, the lid 3 is closed from 45 ° to 0 ° as shown in FIG. In the range up to this point, the radius of the cam portion 52f in contact with the action portion 54c of the leaf spring 54 gradually increases, so that the braking force against the lowering of the support member 52 acts and the sudden fall of the lid 3 is prevented. .

  The mounting member 51 of the lid opening / closing device 5 according to the present invention is manufactured by pressing a metal plate such as SUS (in the case of this embodiment) in the first embodiment. As shown in FIG. 8, the back plate 51d, the right side plate 51e and the left side plate 51f formed by being bent at right angles from both sides of the back plate 51d, and the front end portions of the right side plate 51e and the left side plate 51f. A pair of right front plate 51b and left front plate 51c formed by bending inward at right angles from the side, and bent at right angles from the lower end of the back plate 51d to the front, and locking protrusions 51k provided on the left and right sides thereof 51l and a bottom plate 51i inserted into locking holes 51m and 51n provided in the lower part of the right side plate 51e and the left side plate 51f, respectively, a back plate 51d, a right side plate 51e, a left side plate 51f, and a right front plate 51b. , Left front Leaf spring accommodating portion 51a Surrounded by a plate 51c, and the bottom plate 51i space is formed. The locking protrusions 51k, 51l provided on the right and left of the bottom plate 51i are inserted into the locking holes 51m, 51n provided on the lower side of the right side plate 51e and the left side plate 51f, thereby increasing the bending strength of the bottom plate 51i. It is configured not to be deformed by the elasticity of the leaf spring 54. The bottom plate 51i is provided with screw holes 51j for screwing the adjustment screw 56, and the right side plate 51e and the left side plate 51f are provided with shaft holes 51g and 51h for mounting the hinge shaft 53.

  The support member 52 is, for example, a synthetic resin molded product, and is rotatably attached to the upper portion of the attachment member 51 via a hinge shaft 53. 2-7, the support member 52 has a base portion 52a having a hinge shaft insertion hole 52g through which the hinge shaft 53 is inserted, an arm portion 52b extending therefrom, and the cam portion 52f. Screw insertion holes 52c and 52d for attaching the lid 3 and positioning protrusions 52e for the lid 3 are formed in the portion 52b. As shown in FIG. 5, the lid 3 is attached to the support member 52 via washers 8a and 8b by means of attachment screws 7a and 7b inserted through the screw insertion holes 52c and 52d.

  The leaf spring 54 has a substantially inverted L-shaped side surface and has a width substantially the same as the width between the right side plate 51e and the left side plate 51f of the mounting member 51, and its main body is accommodated in the leaf spring accommodating portion 51a. It is disguised. A predetermined rotational torque is applied to the support member 52 by pressing the outer peripheral surface of the cam portion 52 f of the support member 52. As shown in FIGS. 4 to 7 and 9, the leaf spring 54 includes an attachment end 54 a attached to the bottom plate 51 i of the attachment member 51 by an adjustment screw 56, a free end 54 b on the distal end side, and a side surface near the free end. It is comprised from the action part 54c contact | abutted by a cam part, and the intermediate | middle main-body part 54d. The mounting end 54a is provided with a through hole 54e (FIG. 9) through which the adjustment screw 56 is inserted. In the illustrated embodiment, the angle formed between the attachment end 54a and the main portion 54d is set to α = 77.5 °, for example, and the angle formed between the action portion 54c and the main portion 54d is set to β = 135 °, for example. In the embodiment, the attachment end 54a is moved in the vertical direction by the adjustment screw 56 around the bottom plate 51i from the gap a provided between the front plates 51b and 51c of the attachment member 5 and the bottom plate 51i. However, the attachment end may be configured to be attached to the upper side of the bottom plate 51i so as to be movable in the vertical direction by the adjusting screw 56.

  As shown in FIG. 4, the adjusting screw 56 has a head portion 56a and a hexagonal hole 56c, and can be operated by inserting a hexagonal wrench into the hexagonal hole 56c.

  The application of the rotational torque by the leaf spring 54 during the opening / closing operation of the lid 3 has been described above, but when the setting of the rotational torque is changed, the screwing amount of the adjustment screw 56 of the elasticity adjusting means 55 is adjusted. To do. That is, if the adjusting screw 56 is loosened from the state shown in FIG. 5, the distance between the mounting end 54a of the leaf spring 54 and the cam portion 52f increases, and the stress applied to the leaf spring 54 decreases. The pressing force applied to the cam portion 52f by the action portion 54c of the spring 54 is also reduced, and the rotational torque applied to the support member 52 is also reduced. On the contrary, if the screwing amount of the adjusting screw 56 is increased, the rotational torque applied to the support member 52 is increased.

  Next, Embodiment 2 of the lid opening / closing device according to the present invention will be described with reference to FIGS. In these drawings, the same reference symbols as those in the first embodiment shown in FIGS. 1 to 9 are members having the same or equivalent functions as those in the first embodiment. Since the effect is the same, the description is omitted.

  The main points of the difference between the second embodiment and the first embodiment are, for example, as shown in FIGS. 11 to 14. (1) The mounting member 511 of the second embodiment is different from the mounting member 51 of the first embodiment. That is, the back-and-forth direction is reversed, that is, the back plate 51d portion of the first embodiment is divided into two in the vertical direction into the right back plate 511c and the left back plate 511d in the second embodiment. A locking hole 511k is provided in the upper part of the part and a female screw hole 511j is provided in the lower part, and the part of the front plate 511b is not divided into two parts. (2) The leaf spring 541 has a substantially deformed U-shape. (3) An adjustment screw 56 constituting the rotational torque elasticity adjusting means 551 is attached to a female screw hole 511j provided between the right back plate 511c and the left back plate 511d of the attachment member 511, and at its tip. The leaf spring 541 having the deformed U-shape That by pressing the bent bending portion 541e, and so on. In other words, the mounting member 511 of the second embodiment has a configuration in which the mounting member 51 of the first embodiment is reversed.

  This will be specifically described below. The lid opening / closing device 501 shown in FIGS. 10 to 14 is attached to the device main body 2 side in the same manner as in the first embodiment, and is attached to the attachment member 511 via the hinge shaft 53 so as to be rotatable. The supporting member 52, the leaf spring 541 accommodated in the mounting member 511, the cam portion 52f provided on the supporting member 52 side, and the elastic force adjusting means 551 for the leaf spring 541, this embodiment In this case, the elasticity adjusting means 551 is attached to a female screw hole 511j provided between the right back plate 511c and the left back plate 511d, and presses the plate spring 541 having the deformed U shape at the tip thereof. It is configured.

  As in the case of the first embodiment, the attachment member 511 is provided with a leaf spring accommodating portion 511a, and a leaf spring 541 having a substantially deformed U shape is accommodated therein. A support member 52 is rotatably attached to the upper portion of the attachment member 511 via a hinge shaft 53, and the support member 52 contacts the plate spring 541 in the plate spring accommodating portion 511a. The cam part 52f is provided in the part to perform. The leaf spring 541 in the second embodiment has a substantially deformed U-shape as described above, and the side surface of the action portion 541c near the free end 541b is brought into contact with the cam portion 52f. A predetermined rotational torque is applied to the support member 52 by pressing the surface. Further, the lid opening / closing device 501 is provided with elasticity adjusting means 551 including an adjusting screw 56 provided between the right back plate 511c and the left back plate 511d of the mounting member 511, and the plate spring 541 is supported by the support member 52. The rotational torque of the support member 52 can be adjusted by adjusting the pressing force applied to the cam portion 52f. That is, by changing the screwing amount of the adjusting screw 56, the curvature of the bending curve portion 541e of the leaf spring 541 is adjusted, and the pressing force applied to the cam portion 52f by the action portion 541c of the leaf spring 541 is adjusted. The rotational torque of the support member 52 can be adjusted.

  The attachment member 511 of the lid opening / closing device 501 in the second embodiment is produced by pressing a single metal plate such as SUS, as shown in FIGS. The front plate 511b, the right side plate 511e and the left side plate 511f, the right back plate 511c and the left back plate 511d bent at right angles so as to surround the back surface from the rear end edges thereof, and the lower end of the front plate 511b The inner wall surrounded by the inclined wall 511l and the bottom plate 511i extending toward the rear is a leaf spring accommodating portion 511a. As shown in FIG. 14A, a divided female screw hole 511j for screwing the adjusting screw 56 is provided in the lower part of the right back plate 511c and the left back plate 511d, and in the upper part thereof. Are provided with divided locking holes 511k for fitting convex portions 541f provided on the mounting end 541a of the plate spring 541. Further, shaft holes 511g and 511h for mounting the hinge shaft 53 are provided in the upper part of the right side plate 511e and the left side plate 511f.

  The leaf spring 541 having the substantially deformed U-shape is accommodated in the leaf spring accommodating portion 511a of the mounting member 511, and presses the outer peripheral surface of the cam portion 52f of the support member 52, thereby supporting the support member. A predetermined rotational torque is applied to 52. As shown in FIGS. 12 and 13, the leaf spring 541 is attached by fitting the convex portion 541f into the locking holes 511k provided in the right back plate 511c and the left back plate 511d of the attachment member 511. A mounting end 541a, a free end 541b on the distal end side, an action portion 541c that comes into contact with the cam portion 52f on the side surface near the free end, an intermediate main portion 541d, and a bending curved portion 541e. . In order to stably hold the bent portion 541e of the leaf spring 541 at a predetermined position, an angle θ formed by the bottom plate 511i and the inclined wall 511l is set to, for example, θ = 131.7 ° in the illustrated embodiment. Is done.

  The adjustment screw 56 has a head portion 56a, a screw portion 56b, and a hexagonal hole 56c, as in the first embodiment, and can be operated by fitting a hexagonal wrench into the hexagonal hole 56c. It is like that.

  When changing the setting of the rotational torque of the support member 52 of the lid opening / closing device 501 in the second embodiment, the screwing amount of the adjusting screw 56 of the elastic force adjusting means 551 is adjusted. That is, as shown in FIG. 13, when the adjusting screw 56 is tightened more than in the state shown in FIG. 12, the radius of curvature of the bending curved portion 541e of the leaf spring 541 decreases, and the stress of the leaf spring 541 increases. Therefore, the pressing force applied to the cam portion 52f by the action portion 541c of the leaf spring 541 also increases, and the rotational torque applied to the support member 52 also increases. On the contrary, if the screwing amount of the adjusting screw 56 is decreased, the rotational torque applied to the support member 52 is decreased.

  Next, Embodiment 3 of the lid opening / closing device according to the present invention will be described with reference to FIGS. In these drawings, components having the same reference symbols as those of the first or second embodiment are members having the same or equivalent functions as those of the first and second embodiments, and their effects are also given. Since it is the same, description is abbreviate | omitted.

  The lid opening / closing device 502 of the third embodiment is different from that of the second embodiment in that there is still another slightly smaller U-shape that is slightly smaller in the inside of the leaf spring 541 that has the substantially U-shape. This is that an auxiliary leaf spring 561 exhibiting the above is added. By providing two leaf springs in this way, it becomes possible to store more stress and to cope with opening and closing of a heavy lid. The other configuration is the same as that of the second embodiment shown in FIGS.

  Next, Embodiment 4 of the lid opening / closing device according to the present invention will be described with reference to FIGS. In these drawings, the same reference symbols as those in the first to third embodiments are members having the same or equivalent functions as those in the embodiments, and the operational effects are also the same. Since there is, description is abbreviate | omitted.

  The lid opening / closing device 503 of the fourth embodiment is different from the second embodiment (FIGS. 10 to 14) in that instead of the metal plate mounting member 511 in the second embodiment, a synthetic resin mounting member 571 is used. It is used, and the elasticity adjusting means 551 in the second embodiment is not provided.

  The synthetic resin mounting member 571 in the fourth embodiment is manufactured by integrally molding synthetic resin, and accommodates a leaf spring 541 having a substantially U-shape that is substantially the same as in the second embodiment. And a front plate 571b, a back plate 571c, a right plate 571d, a left plate 571e, shaft holes 571f and 571g, a bottom plate 571h, a locking hole 571i, and the like. The locking hole 571i is a hole for fitting and holding the convex portion 541f of the leaf spring 541. The longitudinal cross-sectional shape of the leaf spring accommodating portion 571a is adapted to the longitudinal cross-sectional shape of the leaf spring 541, and is devised so that rattling does not occur during operation of the leaf spring 541 accommodated therein. Further, the right side plate 571d and the left side plate 571e forming the leaf spring accommodating portion 571a are provided with step portions 571d 'and 571e' that slightly narrow the width between the two members to prevent the leaf spring 541 from rattling. In addition, it is possible to ensure stable operation during operation and to prevent abnormal noise. Since the functions of these components are clear from the description of the embodiments so far, the description thereof is omitted.

  Next, a fifth embodiment of the lid opening / closing device according to the present invention will be described with reference to FIGS. The lid opening / closing device 504 of the fifth embodiment is different from the fourth embodiment (FIGS. 17 to 19) in that the third embodiment (FIG. 17) is provided inside the leaf spring 541 having the substantially deformed U shape. 15 to 16), a leaf spring 561 having a slightly small and substantially deformed U shape is further accommodated.

  By providing two leaf springs in this way, it becomes possible to store more stress, and it is possible to cope with opening and closing of a heavy lid, as in the case of the third embodiment. It is. Since the other configuration is clear from the description of the embodiments so far, the description is omitted.

  Next, Embodiment 6 of the lid opening / closing device according to the present invention will be described with reference to FIGS. The lid opening / closing device 505 of the sixth embodiment is different from that of the fourth embodiment (FIGS. 17 to 19) in that a leaf spring 541 having a substantially U-shaped leaf spring shape is made of, for example, hard rubber. The elastic member 581 having a circular cross section is accommodated. This elastic member may be made of synthetic resin or a torsion spring.

  In the case of the third embodiment, it is possible to store more stress by accommodating the elastic member in the leaf spring in this way, and it is possible to cope with opening and closing of a heavy lid. It is the same. The configuration of the other members and the operation and effects thereof are clear from the description of the embodiments so far, and the description thereof is omitted.

  Since the present invention is configured as described above, it is a simple configuration with a low manufacturing cost. In particular, it is a comparative example of various devices for production facilities including office machines such as copying machines, multifunction machines, and printing machines. The present invention is suitably used as a lid opening / closing device for opening / closing a lightweight lid, or as various devices such as the office equipment using the lid opening / closing device having such a configuration.

1 Copier (various devices)
2 Device body 3 Lid 5, 501, 502 Lid opening / closing device 51, 511, 571 Mounting member 51 a, 511 a, 571 a Leaf spring accommodating portion 51 d, 571 c Back plate 51 i, 511 i, 571 h Bottom plate 52 Support member 52 f Cam portion 53 Hinge Shafts 54, 541 Leaf springs 54b, 541b Free ends 54c, 541c Action portions 55, 551 Elasticity adjustment means 56 Adjustment screw 541e Bending curve portion 581 Elastic member

Claims (8)

A lid opening / closing device that is provided between a device main body and a lid of various devices and connects the lid to the device main body so as to be openable and closable.
An attachment member attached to the rear upper end of the apparatus main body and provided with a leaf spring accommodating portion;
A support member for supporting the lid body rotatably attached to the upper part of the attachment member via a hinge shaft;
A cam portion provided on the support member;
A leaf spring that is housed and fixed in the leaf spring housing portion of the mounting member, and is formed by pressing an action portion provided on a free end side thereof to the cam portion;
A lid opening and closing device characterized by comprising:   2. The lid opening / closing device according to claim 1, wherein an elastic force adjusting means for adjusting a pressing force applied to the cam portion of the support member by the plate spring is provided between the attachment member and the plate spring.   The leaf spring is configured to have a substantially inverted L-shaped longitudinal section, and its elasticity adjusting means is movable up and down on one end side of the leaf spring to the bottom plate of the mounting member via an adjustment screw. The lid opening / closing device according to claim 1, wherein the lid opening / closing device is provided.   The plate spring is configured to have a substantially U-shaped vertical cross section, and one end side of the plate spring is locked to the back plate of the mounting member, and the elasticity adjusting means is arranged on one side of the plate spring. 2. The lid opening / closing device according to claim 1, wherein a curvature of the bending curved portion is adjusted by the elasticity adjusting means by contacting an adjusting screw attached to the attachment member.   The leaf spring is configured to have a substantially U-shaped longitudinal section, and the mounting member is formed of a synthetic resin molded product provided with a leaf spring accommodating portion that matches the curved shape of the leaf spring. 2. The lid opening / closing device according to claim 1, wherein the leaf spring is accommodated in the leaf spring accommodating portion.   The lid opening / closing device according to claim 1, wherein a plurality of the leaf springs are provided so as to overlap each other.   6. The lid opening / closing device according to claim 5, wherein the leaf spring having a substantially U-shaped longitudinal section contains an elastic member having a circular section in a bending curved portion thereof.   Various devices comprising the lid opening / closing device according to any one of claims 1 to 7.

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