JP2012184806A - Damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damper having simple part constitution and capable of exhibiting relatively large damping force.SOLUTION: The damper 100 damping impact generated when a document pressing plate collides with the body of an office machine is equipped with a case 110 fixed to the body, an arm 120 having a cam part 123 and connected to the case 110 turnably in forward and rearward direction, a slider 140 supported by the case 110 movably in a direction approaching to and separating from the arm 120, a spring 150 biasing the slider 140 in the approaching direction and making the slider 140 abut on the cam part 123, a slid side abutting surface 141 inclining to a surface vertical to the approaching and separating direction of the slider 140 and abutting on the cam part 123 is formed in the slider 140.

Description

  The present invention relates to a damper that relaxes (shocks shock) a closing speed of a document crimping plate of an office device with respect to a main body of the office device, for example.

2. Description of the Related Art Conventionally, many office machines used in offices such as copying machines, facsimile machines, scanners, and the like have a document reading unit (contact glass) provided on the upper surface of the main body and a document crimping plate that covers the document reading unit. .
The document crimping plate is used for bringing the document placed on the document reading unit into close contact with the document reading unit and holding the position of the document with respect to the document reading unit. Generally, the end of the document crimping plate is hinged. It is rotatably connected to the end of the upper surface of the main body of the office equipment.

Such a document pressing plate requires a certain amount of weight in order to bring the document into close contact with the document reading unit. In addition, when an automatic document feeder (ADF) is provided on the original pressure plate, the weight of the original pressure plate further increases.
Therefore, the conventional hinge for connecting the main body of the office equipment and the original pressure plate has a spring interposed between the mounting member fixed to the main body of the office equipment and the support member fixed to the original pressure plate. By supporting the weight of the document crimping plate with the biasing force of the spring, the rotation angle (opening / closing angle) of the document crimping plate with respect to the main body of the office equipment can be held at any angle (free stop function), and the operator can then crimp the document. The operation of placing the document on the document reading unit by rotating (opening and closing) the plate is facilitated.

  In addition, when the rotation angle (opening / closing angle) of the document crimping plate with respect to the main body of the office equipment is in a range from a completely closed angle to an angle opened several degrees, the rotational force (torque) is based on the weight of the document crimping plate rather than the biasing force of the spring. ) Is set to be slightly higher, and the damper presses the original pressure plate that rotates in the closing direction under its own weight in the angle range, thereby preventing the original pressure plate from colliding with the main body of the office equipment. On the other hand, there is also known a hinge that can securely close the original cover against the main body of the office equipment. For example, as described in Patent Document 1.

The damper provided in the hinge (document pressure plate opening / closing device) described in Patent Document 1 is a so-called oil damper, a cylinder filled with oil, a piston movably provided in the cylinder, and one end connected to the piston. The other end is provided with a piston rod protruding from the cylinder, a lid for closing the cylinder, a sealing material such as an O-ring, and the like.
In the case of the hinge described in Patent Document 1, the damper is housed inside the spring of the hinge, and when the spring is contracted to a predetermined length or less, the piston rod comes into contact with the slider. The movement of the piston is inhibited by the viscous resistance of the oil filled in the cylinder and the rotation of the hinge, and hence the rotation of the original pressing plate with respect to the main body of the office equipment, is buffered.

In recent years, miniaturization and cost reduction of office equipment are progressing, and accordingly, hinges are required to be further reduced in size and cost without impairing conventional functions.
In other words, it has a desired buffering force (capacity to buffer the impact when the original cover is closed), the component configuration is simple, and in some cases, a small and simple hinge (rotating) Attached to office equipment separately (at a position apart) from a member that is fixed to two objects that can be connected and a hinge that has only a rotating shaft that connects these members so as to be rotatable. Is required.

However, the damper provided in the hinge described in Patent Document 1 has a large number of parts, the shape of each part is complicated, and high dimensional accuracy is required for each part in order to control the viscous resistance of the fluid with high accuracy. Therefore, the manufacturing cost is high.
Moreover, the damper which the hinge of patent document 1 comprises is arrange | positioned inside the spring for exhibiting a free stop function, and the damper exhibits a buffering force when the slider which receives a spring presses a damper. Therefore, even when the spring is omitted to make the hinge without the free stop function, it is necessary to leave the slider and the cam that contacts the slider in order to operate the damper. This hinders downsizing of the hinge.

JP 2006-133532 A

The present invention has been made in view of the above situation.
That is, the problem to be solved by the present invention is to provide a damper that has a simple component configuration and can exhibit a relatively large buffering force.

  Hereinafter, means for solving this problem will be described.

That is, in claim 1,
A damper for buffering an impact when the second object comes into contact with the first object,
A fixing member fixed to the first object;
A rotating member that includes a cam portion and is rotatably connected to the fixed member in a forward direction and a reverse direction; an approaching direction that is a direction approaching the rotating member; and a direction that is away from the rotating member A slide member supported by the fixed member so as to be movable in a separating direction,
One end part contacts the fixed member, the other end part contacts the slide member, and the slide member is urged in the approaching direction to bring the slide member into contact with the cam part. A biasing member that applies torque to the rotating member so that the member rotates in the positive direction with respect to the fixed member;
Comprising
The slide member is formed with a slide-side contact surface that is inclined with respect to a surface perpendicular to the approaching direction and the separation direction and contacts the cam portion.

In claim 2,
Of the slide side contact surface, the portion closer to the approach direction forms a main contact surface,
Of the slide-side contact surface, a portion closer to the separation direction forms an introduction contact surface continuous with the main contact surface,
The inclination angle of the main contact surface with respect to the surface perpendicular to the approach direction and the separation direction is larger than the inclination angle of the introduction contact surface with respect to the surface perpendicular to the approach direction and the separation direction,
When the external force from the second object does not act on the rotating member, the cam portion abuts on the introduction abutment surface of the slide side abutment surface,
When an external force from the second object acts on the rotating member and the rotating member rotates in the reverse direction, a portion of the slide-side contact surface that contacts the cam portion is the introduction contact. The slide member moves from the contact surface to the main contact surface, the slide member moves in the separation direction, and the force by which the biasing member biases the slide member in the approaching direction increases.

In claim 3,
The fixing member is formed with a storage chamber that has a bottom surface and an inner peripheral surface and has an opening communicating with the outside, and is a space for storing the slide member and the biasing member.
One end of the urging member abuts on the bottom surface of the storage chamber,
The other end of the urging member abuts on the slide member accommodated in the accommodation chamber,
The slide member moves in the approaching direction by moving in a direction protruding outward from the opening of the storage chamber while contacting the inner peripheral surface of the storage chamber, and contacts the inner peripheral surface of the storage chamber. However, it moves in the separation direction by moving in the direction of immersing into the interior of the storage chamber from the opening of the storage chamber.

In claim 4,
Of the inner circumferential surface of the storage chamber, a lubricant is applied to a portion on the opposite side of the portion facing the slide-side contact surface of the slide member.

In claim 5,
A damper for buffering an impact when the second object comes into contact with the first object,
A fixing member fixed to the first object;
A movable member supported by the fixed member so as to be movable in a forward direction protruding from the fixed member and a reverse direction immersed in the fixed member, and capable of holding a state in which one end portion protrudes from the fixed member;
An approach direction that is a direction different from the forward direction and the reverse direction and approaches the other end of the moving member, and a direction different from the forward direction and the reverse direction and the other end of the moving member A slide member supported by the fixed member so as to be movable in a separation direction that is a direction away from the slide member;
One end abuts against the fixed member and the other end abuts against the slide member, and biases the slide member in the approaching direction to bring the slide member into contact with the other end of the moving member. An urging member for applying a force to move the moving member in the positive direction;
Comprising
The slide member is formed with a slide-side contact surface that is inclined with respect to a surface perpendicular to the approaching direction and the separation direction and contacts the other end portion of the moving member.

In claim 6,
Of the slide side contact surface, the portion closer to the approach direction forms a main contact surface,
Of the slide-side contact surface, a portion closer to the separation direction forms an introduction contact surface continuous with the main contact surface,
The inclination angle of the main contact surface with respect to the surface perpendicular to the approach direction and the separation direction is larger than the inclination angle of the introduction contact surface with respect to the surface perpendicular to the approach direction and the separation direction,
When the external force from the second object does not act on the rotating member, the other end of the moving member abuts on the introduction abutment surface of the slide side abutment surface,
When the moving member moves in the opposite direction due to the external force from the second object acting on the moving member, the portion that contacts the other end of the moving member on the slide-side contact surface is the introduction The slide member moves from the contact surface to the main contact surface, the slide member moves in the separation direction, and the force with which the biasing member biases the slide member in the approaching direction is increased.

In claim 7,
The fixing member is formed with a storage chamber that has a bottom surface and an inner peripheral surface and has an opening communicating with the outside, and is a space for storing the slide member and the biasing member.
The fixed member is configured such that one end of the moving member protrudes from the fixed member and the other end of the moving member is opposed to the opening of the storage chamber while the moving member is moved in the forward direction and the reverse direction. It has a support part that is movably supported in the direction,
One end of the urging member abuts on the bottom surface of the storage chamber,
The other end of the urging member abuts on the slide member accommodated in the accommodation chamber,
The slide member moves in the approaching direction by moving in a direction protruding outward from the opening of the storage chamber while contacting the inner peripheral surface of the storage chamber, and contacts the inner peripheral surface of the storage chamber. However, it moves in the separation direction by moving in the direction of immersing into the interior of the storage chamber from the opening of the storage chamber.

In claim 8,
Of the inner circumferential surface of the storage chamber, a lubricant is applied to a portion on the opposite side of the portion facing the slide-side contact surface of the slide member.

  The present invention has an effect that the component configuration is simple and a relatively large buffering force can be exhibited.

(A) Partial cross-sectional view of the left side of the scanner including the first embodiment of the damper according to the present invention in a state where the original cover is open, (b) The present invention in a state where the original cover is in contact with the damper. The left side partial cross section figure which shows the scanner which comprises the first embodiment of the damper concerning this invention, (c) The left side which shows the scanner which comprises the first embodiment of the damper concerning the present invention in the state where the original pressure plate has closed FIG. (A) The perspective view from the upper left rear which shows 1st embodiment of the damper concerning this invention, (b) The left view which shows 1st embodiment of the damper concerning this invention. (A) The top view which shows 1st embodiment of the damper which concerns on this invention, (b) The bottom view which shows 1st embodiment of the damper which concerns on this invention. (A) Left side sectional view showing the first embodiment of the damper according to the present invention when no external force is acting (AA arrow sectional view in FIG. 3 (a)), (b) External force is acting The left side sectional view showing the 1st embodiment of the damper concerning the present invention when doing. (A) The perspective view from the upper left rear which shows the case of 1st embodiment of the damper concerning this invention, (b) The perspective view from the lower right front which shows the case of 1st embodiment of the damper concerning this invention. (A) The perspective view from the upper left rear which shows the arm of 1st embodiment of the damper which concerns on this invention, (b) The perspective view from the lower right front which shows the arm of 1st embodiment of the damper concerning this invention. (A) The perspective view from the upper left rear which shows the slider of 1st embodiment of the damper concerning this invention, and 2nd embodiment, (b) The slider of 1st embodiment and 2nd embodiment of the damper concerning this invention The perspective view from the lower right front which shows. The left view which shows the slider of 1st embodiment and 2nd embodiment of the damper which concerns on this invention. (A) A partial cross-sectional view of the left side of the scanner including the second embodiment of the damper according to the present invention in a state where the original cover is open, (b) the present invention in a state where the original cover is in contact with the damper. The left side partial cross section figure which shows the scanner which comprises 2nd embodiment of the damper which concerns on this invention, (c) Left side which shows the scanner which comprises 2nd embodiment of the damper which concerns on this invention in the state which the original pressure plate has closed FIG. (A) Left side sectional view showing a second embodiment of the damper according to the present invention when no external force is acting, (b) Second embodiment of the damper according to the present invention when an external force is acting FIG. (A) The perspective view from the upper left rear which shows the case of 2nd embodiment of the damper concerning this invention, (b) The perspective view from the lower right front which shows the case of 2nd embodiment of the damper concerning this invention. (A) The perspective view from the upper left rear which shows what equipped the 1st embodiment of the damper concerning the present invention with the regulation pin, (b) What equipped the regulation pin in the first embodiment of the damper concerning the present invention The left view which shows.

  Below, the damper 100 which is 1st embodiment of the damper based on this invention is demonstrated using FIGS. 1-8.

Hereinafter, the scanner 1 to which the damper 100 is applied will be described with reference to FIG.
The scanner 1 is an embodiment of office equipment, and includes a main body 2, an original cover 3, a hinge 4, and a damper 100.

The main body 2 is an embodiment of the first object according to the present invention.
The main body 2 of the present embodiment includes a document reading device, a control device, a display device, and an input device. The document reading device of the main body 2 is disposed on the upper surface of the main body 2. The document reading device of the main body 2 reads a document placed on the upper surface of the main body 2 (generates image information of the document). The control device of the main body 2 controls the operation of each unit of the scanner 1, more specifically the operation of the document reading device of the main body 2. The control device of the main body 2 stores the image information generated by the document reading device of the main body 2, and other equipment (such as a personal computer) through a line (for example, an Internet line) connected to the main body 2. Can be sent to. The display device of the main body 2 is composed of a liquid crystal panel, for example, and displays information related to the operation status of the scanner 1 and the like.
The input device of the main body 2 includes buttons, switches, and the like, for example, and is operated when an operator inputs an instruction or the like to the scanner 1. The display device and the input device of the main body 2 are arranged at the front end portion on the upper surface of the main body 2.

The original cover 3 is an embodiment of the second object according to the present invention.
The document crimping plate 3 is a plate-like member, and presses (crimps) a document placed on the document reading device of the main body 2 toward the document reading device of the main body 2, whereby the document reading device of the main body 2. Prevents the original from moving when the original is read (the position of the main body 2 relative to the original reading device changes).

  The hinge 4 connects the main body 2 and the original cover 3 in a rotatable manner. The hinge 4 of the present embodiment includes two wing members and a rotation shaft that connects the two wing members so as to be rotatable. Of the two wing members constituting the hinge 4, one member is fixed to the rear upper end portion of the main body 2, and the other member is fixed to the rear lower end portion of the original cover 3.

“Office equipment” refers to an apparatus having at least a function of reading a document (acquiring image information of the document).
“Original” refers to a sheet-like object (paper, resin sheet, etc.) on which the text (print, photograph, etc.) is written on the sheet surface (wide surface).
Specific examples of the office equipment include the following (a) to (d).
(A) A scanner having a function of reading a document and a function of transmitting image information relating to the read document to another device (for example, a personal computer).
(B) A fax having a function of reading a document, a function of transmitting image information relating to the read document to another device via a communication line, and a function of printing out image information acquired from another device.
(C) A copying machine having a function of reading a document and a function of printing out image information relating to the read document.
(D) A multifunction device that also functions as the scanner, fax, and copier.

The damper 100 cushions an impact when the original cover 3 is closed (contacted) with respect to the main body 2.
As shown in FIG. 1, the damper 100 is accommodated in a damper accommodation hole 2 a formed in the main body 2. The damper accommodating hole 2a is opened at a position that is a front-rear halfway portion and a left end portion on the upper surface of the main body 2.

As shown in FIGS. 2, 3, and 4, the damper 100 includes a case 110, an arm 120, a rotation pin 130, a slider 140, and a spring 150.
Below, the detail of each member which comprises the damper 100 is demonstrated.
In the following, for the sake of convenience, the vertical direction, the front-rear direction, and the left-right direction of the scanner 1 shown in FIG. 1A are referred to (the vertical direction, the front-rear direction, and the left-right direction of the scanner 1 shown in FIG. A description will be given by associating the damper 100 shown in FIG. 1A with the up-down direction, the front-rear direction, and the left-right direction.

Hereinafter, details of the case 110 will be described mainly with reference to FIG.
Case 110 is an embodiment of a fixing member according to the present invention.
As shown in FIG. 5, the case 110 is a rectangular parallelepiped member that is slightly long in the front-rear direction, and is manufactured by integrally molding a resin material.
The case 110 includes a lower plate 111, side plates 112L and 112R, an upper plate 114, and a front plate 115.

  The lower plate 111 is a member that forms the lower part of the case 110. The lower plate 111 of this embodiment is a plate-like member having a pair of upper and lower plate surfaces (upper surface and lower surface), and the planar view shape of the lower plate 111 is a rectangle that is long in the front-rear direction.

  Through holes 111a, 111b, 111c, and 111d are formed in the lower plate 111. Each of the through holes 111a, 111b, 111c, and 111d penetrates vertically from the upper surface to the lower surface of the lower plate 111. The through hole 111a is disposed at the left rear end portion of the lower plate 111, the through hole 111b is disposed at a position that is the rear end portion and the left and right center portion of the lower plate 111, and the through hole 111c is the front end portion and the left and right portions of the lower plate 111. The through hole 111 d is disposed at the right front end of the lower plate 111.

  The lower plate 111 is formed with fitting grooves 111e and 111f. Each of the fitting grooves 111e and 111f has a shape extending in the front-rear direction, and penetrates vertically from the upper surface to the lower surface of the lower plate 111. The fitting grooves 111e and 111f are arranged in the front and rear middle portions of the lower plate 111. The fitting groove 111f is arranged at a position on the right side with a predetermined interval from the fitting groove 111e.

The side plate 112L is a member forming the left side portion of the case 110. The side plate 112L of the present embodiment is a plate-shaped member having a pair of left and right plate surfaces (left surface and right surface), and the lower plate 111 obliquely cuts out the rear upper part of a rectangle that is long in the front-rear direction in a side view, and It is the shape which provided the protrusion which protrudes upwards in the latter half part (part corresponding to the front-end part of the cut-out part) of the upper side of the said rectangle.
A through hole 113L is formed in the side plate 112L. The through hole 113L penetrates left and right from the left surface to the right surface of the side plate 112L. The through hole 113L is disposed in a portion corresponding to the “protrusion in the latter half of the upper side” in the side plate 112L.
The lower end portion of the side plate 112L continues to a position that becomes the left end portion and the front and rear central portion of the lower plate 111.
The side plate 112L of the present embodiment is shorter in the front-rear direction than the lower plate 111, and the front end of the lower plate 111 (the portion where the through holes 111c and 111d are formed) protrudes forward from the front end of the side plate 112L. The rear end portions (portions where the through holes 111a and 111b are formed) protrude rearward from the rear end portions of the side plates 112L.

The side plate 112 </ b> R is a member that forms the right side portion of the case 110. A through hole 113R is formed in the side plate 112R. The lower end portion of the side plate 112R is connected to the right end portion of the lower plate 111 and the position that becomes the front and rear center portion.
Since the side plate 112R of the present embodiment has a symmetrical shape with respect to the side plate 112L, detailed description of the shape of the side plate 112R is omitted.

  The upper plate 114 is a member that forms the upper part of the case 110. The upper plate 114 of the present embodiment is a plate-like member having a pair of upper and lower plate surfaces (upper surface and lower surface), and the planar view shape of the upper plate 114 is a rectangle that is slightly long in the front-rear direction. The left end portion of the upper plate 114 is connected to the front half of the side plate 112L (the portion on the front side of the “protrusion of the rear half of the upper side” of the side plate 112L). The right end of the upper plate 114 is connected to the front half of the side plate 112R.

  The front plate 115 is a member that forms the front portion of the case 110. The front plate 115 of this embodiment is a plate-like member having a pair of front and rear plate surfaces (front and rear surfaces), and the front view shape of the front plate 115 is a rectangle that is slightly long in the left-right direction. The left and right end portions of the front plate 115 are respectively connected to the front end portion of the side plate 112L and the front end portion of the side plate 112R, and the upper and lower end portions of the front plate 115 are respectively connected to the front end portion of the upper plate 114 and the front half portion of the lower plate 111 (in the lower plate 111). A portion that is slightly behind the portion where the through holes 111c and 111d are formed.

A housing chamber 116 is formed in the case 110. The storage chamber 116 is an embodiment of the storage chamber according to the present invention. The storage chamber 116 of the present embodiment is a space surrounded by the lower plate 111, the side plates 112L and 112R, the upper plate 114, and the front plate 115.
The storage chamber 116 has an “inner peripheral surface of the storage chamber 116” and a “bottom surface of the storage chamber 116”.
More specifically, the portion of the upper surface of the lower plate 111 that is sandwiched between the side plates 112L and 112R, the right surface of the side plate 112L, the left surface of the side plate 112R, and the lower surface of the upper plate 114 is the “inner peripheral surface of the storage chamber 116”. The rear surface of the front plate 115 forms the “bottom surface of the storage chamber 116”.
The storage chamber 116 has an “opening of the storage chamber 116” that communicates with the outside of the case 110. More specifically, the rear end portions of the side plates 112L and 112R, the portions of the upper end portions of the side plates 112L and 112R that are located behind the “protrusions in the latter half of the upper side”, the rear end portions of the upper plate 114, and the lower plate 111 The sum of the portions on the upper surface of the upper portion of the inner surface of the upper portion of the housing and the rear portion of the through holes 111a and 111b constitutes the peripheral portion of the “opening portion of the storage chamber 116”.

  As shown in FIG. 1, the damper 100 is housed in the damper housing hole 2a, and screws (not shown) are respectively inserted into the through holes 111a, 111b, 111c, and 111d, and these screws are formed on the bottom surface of the damper housing hole 2a. The case 110 (and thus the damper 100) is fixed to the main body 2 by being screwed into the formed screw hole (not shown).

Below, the detail of the arm 120 is demonstrated mainly using FIG.
The arm 120 is an embodiment of a rotating member according to the present invention.
The arm 120 is a rod-like member extending in the vertical direction in the posture shown in FIG. 1, and is manufactured by integrally molding a resin material.
As shown in FIG. 6, the arm 120 includes a body portion 121, a head portion 122, and a cam portion 123.
The body part 121 is a part constituting the main structure of the arm 120. The body portion 121 is a plate-like portion that is thin in the front-rear direction and extends in the up-down direction in the posture shown in FIG.
The head 122 is a substantially cylindrical portion that is continuous with one end of the arm 120 (the upper end in the posture shown in FIG. 1). A contact surface 122 a is formed on the head 122. The contact surface 122 a is a surface corresponding to the outer peripheral surface of the substantially cylindrical head 122.
The cam portion 123 is a portion connected to the other end portion of the arm 120 (the lower end portion in the posture shown in FIG. 1). A cam surface 123 a is formed on the cam portion 123. The cam surface 123 a is a curved surface corresponding to a portion of the outer surface of the cam portion 123 that extends from the front of the cam portion 123 to the lower side through the front lower side.
A through hole 123 b is formed in the cam portion 123. The through hole 123b penetrates the left and right side surfaces of the cam portion 123 in the left-right direction.

Below, the detail of the rotation pin 130 is mainly demonstrated using (a) of FIG.
The rotation pin 130 is a member that forms a rotation axis of the arm 120 with respect to the case 110.
The pivot pin 130 has a body portion 131 and a head portion 132. The rotation pin 130 of the present embodiment is made of a metal material.

The body portion 131 is a substantially cylindrical portion that forms the body of the rotation pin 130. As shown by a dotted line in FIG. 3A, a caulking hole 131 a is formed in one end portion (right end portion) of the body portion 131.
The caulking hole 131a is a hole formed in the end surface of one end portion (right end portion) of the body portion 131. By forming the caulking hole 131a, a thin portion (substantially cylindrical portion) is formed at one end portion (right end portion) of the body portion 131.

  The head portion 132 is a substantially disk-shaped portion that is continuous with the other end portion (left end portion) of the body portion 131. The outer diameter (diameter) of the head portion 132 is larger than the outer diameter (diameter) of the body portion 131.

As shown in FIG. 3A, the body portion 131 of the rotation pin 130 is formed in the through hole 113L formed in the side plate 112L of the case 110 and the cam portion 123 of the arm 120 from the left to the right. The through hole 123b formed in the side plate 112R of the case 110 and the side plate 112R of the case 110 is inserted.
In this embodiment, the inner diameter (diameter) of the through hole 123b is slightly smaller than the outer diameter (diameter) of the body portion 131, and the inner diameters (diameters) of the through holes 113L and 113R are smaller than the outer diameter (diameter) of the body portion 131. Since the rotation pin 130 is pivotally supported by the case 110 so as to be rotatable, the rotation pin 130 is not movable in the axial direction of the rotation pin 130 (in this embodiment, the left-right direction). It is fixed so as not to rotate, and as a result, it is supported so as not to fall off the case 110 and the arm 120.
As described above, the rotation pin 130 connects the case 110 and the arm 120 so as to be rotatable.
In the following description, “the arm 120 rotates in the forward direction with respect to the case 110” means “the arm 120 rotates clockwise with respect to the case 110 in the left side view” The phrase “the arm 120 rotates in the opposite direction with respect to the case 110” indicates that “the arm 120 rotates counterclockwise with respect to the case 110 when viewed from the left side”.

Further, from the state shown in FIG. 3A, the thin portion formed at one end (right end) of the body 131 is pushed in the radial direction (direction perpendicular to the axial direction) of the rotation pin 130. By caulking (plastically deforming), the outer diameter (diameter) of one end portion of the rotating pin 130, that is, the caulked portion becomes larger than the inner diameter (diameter) of the through hole 113R. In addition, the outer diameter (diameter) of the head 132 is larger than the through hole 113L.
As described above, the swivel pin 130 can be supported with respect to the case 110 so as not to fall off by crimping one end portion (right end portion) of the body portion 131.

In the present embodiment, the rotation pin 130 is separate from the case 110 and the arm 120, but the present invention is not limited to this.
That is, if sufficient strength can be secured and the rotating member according to the present invention can be rotatably connected to the fixing member according to the present invention, “the rotating member with respect to the fixing member” The portion corresponding to the rotation axis of the first embodiment may be formed integrally with either the fixed member or the rotation member according to the present invention.

Below, the detail of the slider 140 is demonstrated mainly using FIG. 7 and FIG.
The slider 140 is an embodiment of a slide member according to the present invention.
The slider 140 of the present embodiment is a member having a shape that is obtained by obliquely cutting the rear upper portion of a rectangular parallelepiped, and includes an upper surface, an upper rear surface (a surface corresponding to a diagonally cut portion of the rectangular parallelepiped), a lower surface, a front surface, a rear surface, a left surface, and Has the right side. The slider 140 is manufactured by integrally molding a resin material.

A slide-side contact surface 141 is formed on the slider 140. In the present embodiment, the upper rear surface of the slider 140 corresponds to the slide-side contact surface 141.
As shown in FIG. 8, the slide-side contact surface 141 is inclined with respect to the plane 5 perpendicular to the front-rear direction (not parallel to the plane 5).
The slide-side contact surface 141 of this embodiment is a combination of the main contact surface 141a and the introduction contact surface 141b.
The main contact surface 141a forms a rearward portion of the slide-side contact surface 141. The main contact surface 141a of this embodiment is a flat surface.
The introduction contact surface 141b forms a forward portion of the slide side contact surface 141. The introduction contact surface 141b of the present embodiment is a downwardly convex curved surface, and the rear end portion of the introduction contact surface 141b is continuous with the front end portion of the main contact surface 141a.

  As shown in FIG. 8, the inclination angle θ1 of the main contact surface 141a with respect to the plane 5 perpendicular to the front-rear direction (“the approaching direction of the slider 140” and “the separation direction of the slider 140” described later) is It is larger than the inclination angle θ2 of the surface 141b (θ1> θ2 is established).

Since the main contact surface 141a of the present embodiment is a flat surface, the inclination angle θ1 of the main contact surface 141a with respect to the flat surface 5, more strictly, the angle θ1 formed by the flat surface 5 and the flat surface 6 that coincides with the main contact surface 141a. Does not change according to the position on the main contact surface 141a.
On the other hand, since the introduction contact surface 141b is a downwardly convex curved surface, the inclination angle θ2 of the introduction contact surface 141b with respect to the flat surface 5, more precisely, the flat surface 5 and a certain point on the introduction contact surface 141b. (See the black circle in FIG. 8), the angle θ2 formed with the flat surface 7 in contact with the surface gradually increases from the front end portion to the rear end portion of the introduction contact surface 141b.

In the present embodiment, the rear end portion of the introduction contact surface 141b is smoothly connected to the front end portion of the main contact surface 141a.
In other words, the inclination angle θ2 of the introduction contact surface 141b with respect to the plane 5 is almost the same as the inclination angle θ1 of the main contact surface 141a with respect to the plane 5 at the rear end portion of the introduction contact surface 141b (from the inclination angle θ1). Is also slightly smaller).

As shown in FIG. 7B, a spring receiving hole 142 is formed on the front surface of the slider 140.
The spring receiving hole 142 has an inner peripheral surface and a bottom surface, and is a hole that opens to the front surface of the slider 140.

As shown in FIG. 7, fitting protrusions 143 and 144 are formed at the lower rear portion of the slider 140.
The fitting protrusions 143 and 144 are respectively arranged at left and right positions at the rear lower part of the slider 140 at predetermined intervals in the left-right direction, and the front ends of the fitting protrusions 143 and 144 are the lower surface of the slider 140. Protrude downwards.
In addition, the fitting protrusions 143 and 144 are elastically deformed so as to be bent at the bases of the fitting protrusions 143 and 144 (parts connected to the main body portion of the slider 140), whereby the tip ends of the fitting protrusions 143 and 144 are moved to the slider. It is possible to retract to a position that is flush with the lower surface of 140 (same height in the vertical direction).

As shown in FIG. 4, the slider 140 is housed in the housing chamber 116 of the case 110.
When the slider 140 is stored in the storage chamber 116, the outer peripheral surface of the slider 140 abuts on the inner peripheral surface of the storage chamber 116. More specifically, the upper surface, the lower surface, the left surface, and the right surface of the slider 140 are in contact with the lower surface of the upper plate 114, the upper surface of the lower plate 111, the right surface of the side plate 112L, and the left surface of the side plate 112R, respectively.
As a result, the slider 140 is supported by the case 110 so as to be movable in the front-rear direction.
More specifically, the slider 140 accommodated in the accommodation chamber 116 can move in the front-rear direction with respect to the case 110, but the slider 140 accommodated in the accommodation chamber 116 moves in the vertical direction and the case 110. It cannot move in the left-right direction and cannot rotate with respect to the case 110.

In this embodiment, the direction in which the slider 140 accommodated in the accommodation chamber 116 approaches the arm 120 rotatably connected to the case 110 (in the present embodiment, the rear) is defined as “the approach direction of the slider 140”. In addition, the direction in which the slider 140 accommodated in the accommodation chamber 116 is separated from the arm 120 that is rotatably connected to the case 110 (in the present embodiment) is defined as a “separation direction of the slider 140”. The movement of the slider 140 accommodated in 116 will be described using these directions.
That is, the slider 140 moves in a “protruding direction of the slider 140” by moving in a direction protruding from the opening of the storage chamber 116 to the outside of the case 110 while contacting the inner peripheral surface of the storage chamber 116. The slider moves in the “separating direction of the slider 140” by moving from the opening of the storage chamber 116 in the direction of immersing into the storage chamber 116 while being in contact with the inner peripheral surface of the storage chamber 116.

Of the inner circumferential surface of the storage chamber 116, at least a portion (in this embodiment, the upper surface of the lower plate 111) opposite to the portion facing the slide-side contact surface 141 of the slider 140 has a lubricant (for example, grease). ) Is applied.
Therefore, when the slider 140 is housed in the housing chamber 116, a contact portion between the lower surface of the slider 140 and the upper surface of the lower plate 111 (which will be described in detail later, external force from the original cover 3 is applied to the arm 120. When the slider 140 is subjected to a large force, friction is reduced by the lubricant.

As shown in FIGS. 2A and 3B, when the slider 140 is housed in the housing chamber 116, the fitting protrusions 143 and 144 are fitted in the fitting grooves 111e and 111f, respectively.
Accordingly, when the slider 140 housed in the housing chamber 116 moves in the “direction of approaching the slider 140” and the “separating direction of the slider 140” (when moving in the front-rear direction), the fitting protrusions 143 and 144 are fitted. It moves along the fitting grooves 111e and 111f while maintaining the state of fitting into the grooves 111e and 111f.

Below, the detail of the spring 150 is demonstrated using FIG.
The spring 150 is an embodiment of the biasing member according to the present invention.
The spring 150 of the present embodiment is a winding spring made of a metal material, and is a compression spring (a spring used in a compressed state).
As shown in FIG. 4, the spring 150 is housed in the housing chamber 116 of the case 110.

One end (front end) of the spring 150 accommodated in the accommodation chamber 116 of the case 110 abuts the bottom surface (rear surface of the front plate 115) of the accommodation chamber 116, and the other end (rear end) of the spring 150 is the case 110. (In more detail, the slider 140 is inserted into the spring receiving hole 142 of the slider 140 and contacts the bottom surface of the spring receiving hole 142).
The spring 150 urges the slider 140 in a direction protruding from the opening of the accommodation chamber 116 to the outside of the case 110, that is, “an approaching direction (backward) of the slider 140”, and the slide-side contact surface 141 of the slider 140 is moved to the arm 120. It is made to contact | abut to the cam surface 123a of the cam part 123 of this.
As a result, the urging force of the spring 150 (the force that the spring 150 elastically deformed in the compressing direction tries to return to its original shape) is transmitted to the arm 120 via the slider 140, and the arm 120 is moved to the left side with respect to the case 110. It is urged in a direction to rotate clockwise as viewed.
In this way, the spring 150 applies torque to the arm 120 so that the arm 120 rotates in the positive direction with respect to the case 110 (so as to rotate clockwise in a left side view).

  Hereinafter, the behavior of the damper 100 when the original cover 3 is closed (contacted) with respect to the main body 2 will be described mainly with reference to FIGS. 1 and 4.

As shown in FIG. 1A, the original cover 3 is sufficiently open with respect to the main body 2, and the distance from the front end of the upper surface of the main body 2 to the front end of the lower surface of the original cover 3 is a predetermined distance. (In the case of this embodiment, when it is larger than the distance L1 in FIG. 1B), the original cover 3 is not in contact with the arm 120 (separated from the arm 120).
Therefore, when the document crimping plate 3 is sufficiently open with respect to the main body 2, an external force from the document crimping plate 3 (in this embodiment, the document crimping plate 3 causes the arm 120 to move based on the weight of the document crimping plate 3. The downward pushing force does not act on the arm 120.

As shown in FIG. 4A, when the original pressure plate 3 is not in contact with the arm 120 and the external force from the original pressure plate 3 is not acting on the arm 120, the slider 140 is urged by the urging force of the spring 150. It moves in the “approach direction (rearward) of the slider 140”, and the positions at which the fitting protrusions 143 and 144 abut against the rear end portions of the end faces of the fitting grooves 111e and 111f (FIGS. 2A and 3B). ))).
The cam surface 123a of the cam portion 123 of the arm 120 is in contact with the introduction contact surface 141b of the slide-side contact surface 141 of the slider 140, and the arm 120 indicates that “the head 122 is disposed above and the cam portion 123 is located. Is held in a “position in which it is positioned below”.
When the original cover 3 is not in contact with the arm 120, the upper end portion (head 122) of the arm 120 is disposed at a position above the upper surface of the main body 2.

  As shown in FIG. 1B, the direction in which the original cover 3 is closed with respect to the main body 2 from the state in which the original cover 3 is sufficiently open with respect to the main body 2 (the state shown in FIG. 1A). When the distance from the front end of the upper surface of the main body 2 to the front end of the lower surface of the original cover 3 is reduced to a distance L1, the original is pressed. The lower surface of the plate 3 contacts the contact surface 122a of the head 122 of the arm 120.

From the state shown in FIG. 1B, the original cover 3 is further rotated in the closing direction with respect to the main body 2, and the distance from the front end of the upper surface of the main body 2 to the front end of the lower surface of the original cover 3 is a distance. When the pressure is smaller than L1, an external force from the original cover 3 is applied to the arm 120, and the original cover 3 is maintained while the lower surface of the original cover 3 is in contact with the contact surface 122a of the head 122. Pushes the arm 120 downward.
As a result, the arm 120 rotates in the opposite direction with respect to the case 110 (counterclockwise in the left side view).

When the external force from the original cover 3 is applied to the arm 120 and the arm 120 is rotated in the reverse direction with respect to the case 110, the slide surface abutment surface 141 of the slider 140 contacts the cam surface 123 a of the cam portion 123. The contacting portion 8 moves from the introduction contact surface 141b to the main contact surface 141a (see (a) and (b) of FIG. 4), and the slider 140 is pushed by the cam portion 123 of the arm 120 to “separate the slider 140. Direction (forward) ".
As a result, the spring 150 is compressed (elastically deformed), and the biasing force of the spring 150, that is, the force with which the spring 150 biases the slider 140 in the approaching direction (rearward) of the slider 140 increases.
As described above, a part of the energy (positional energy and kinetic energy of the original cover 3) acting on the arm 120 from the original cover 3 is converted into the elastic energy of the spring 150 and stored in the spring 150. Thus, the speed (angular speed) at which the original cover 3 is rotated in the closing direction with respect to the main body 2 is reduced (compared to the case where the damper 100 is removed from the scanner 1).

As shown in FIGS. 1C and 4B, the original cover 3 is further rotated in the closing direction with respect to the main body 2, and the lower surface of the original cover 3 comes into contact with the upper surface of the main body 2. At this time, the original cover 3 is stopped without being able to rotate further in the closing direction, and is stopped, and the original cover 3 is closed with respect to the main body 2.
The speed (angular speed) at which the original pressure plate 3 rotates in the closing direction with respect to the main body 2 when the lower surface of the original pressure plate 3 contacts the upper surface of the main body 2 is loosened by the damper 100. The impact when the lower surface of the document pressing plate 3 comes into contact with the upper surface of the main body 2 is reduced (compared to the case where the damper 100 is removed from the scanner 1).

By configuring the damper 100 as described above, the component configuration of the damper 100 can be simplified as compared with the component configuration of the conventional oil damper.
More specifically, (i) in the case of a conventional oil damper, it is necessary to perform complicated processing in order to form an oil circulation path in the members constituting the damper, and (ii) such a path is formed. In order to do so, a plurality of members may be combined to form one member, and (c) various mechanisms for preventing oil leakage (for sealing materials such as O-rings and sealing materials) Therefore, the conventional oil damper has a large number of parts as a whole, and the shape of each member is also complicated.
Further, in the case of a conventional oil damper, the dimensional accuracy required for the throttle portion in the oil flow path for accurately controlling the oil flow rate (flow velocity) and the portion related to the mechanism for preventing oil leakage is very high. high.
On the other hand, since the damper 100 does not require a fluid (oil or the like) for buffering the impact with viscous resistance, the number of parts is reduced as compared with the conventional oil damper, and the machining of each part is simplified. It is possible to reduce the manufacturing cost as a whole.

Further, as shown in FIG. 8, “the force by which the cam portion 123 of the arm 120 pushes the slider 140” acts in a direction perpendicular to the slide-side contact surface 141. More specifically, when the cam surface 123a of the cam portion 123 comes into contact with the main contact surface 141a, a force F1 acts in a direction perpendicular to the main contact surface 141a, and the cam surface 123a of the cam portion 123 comes into contact with the introduction contact. When abutting on the surface 141b, a force F2 acts in a direction perpendicular to the introduction abutting surface 141b.
Here, the slide-side contact surface 141 (a combination of the main contact surface 141a and the introduction contact surface 141b) is inclined with respect to the plane 5 perpendicular to the front-rear direction. The force by which the portion 123 pushes the slider 140 ”is decomposed into“ a component in a direction perpendicular to the approaching direction and the separation direction of the slider 140 (a direction perpendicular to the lower surface of the slider 140) ”and“ a component in the separation direction of the slider 140 ”. The
Of these two components, “the component in the direction perpendicular to the approaching direction and the separating direction of the slider 140” is canceled by the reaction force (reaction) from the case 110.
Therefore, when “the force by which the cam portion 123 of the arm 120 pushes the slider 140” is applied, the slider 140 is urged by the urging force of the spring 150 and “the force by which the cam portion 123 of the arm 120 pushes the slider 140”. Stops at a position where the components in the separation direction are balanced.

The “component in the separation direction of the slider 140” in the “force of the cam portion 123 of the arm 120 pushing the slider 140” is “the force of the cam portion 123 of the arm 120 pushing the slider 140” and “the approaching direction and the separation direction of the slider 140”. The cosine of the angle formed by the flat surface 5 and the slide-side contact surface 141 ”.
More specifically, when the cam surface 123a of the cam portion 123 is in contact with the main contact surface 141a and a force F1 is applied in a direction perpendicular to the main contact surface 141a, the slider 140 has a biasing force of the spring 150 of F1. Stop at the position where x cos (θ1). Further, when the cam surface 123a of the cam portion 123 abuts on the introduction contact surface 141b and a force F2 acts in a direction perpendicular to the introduction contact surface 141b, the slider 140 has a biasing force of the spring 150 of F2 × cos ( Stop at the position of θ2).
Since “cos (θ1)” and “cos (θ2)” are both smaller than “1”, when the slider 140 is stopped, the spring 150 indicates that “the cam portion 123 of the arm 120 causes the slider 140 to move. It is possible to support the slider 140 with a force smaller than the “pressing force” and hold the slider 140 in a stationary state.

Accordingly, the damper 100 is equivalent to a conventional shock absorber using a spring having a small spring constant compared to “a direction in which an external force acts and a direction in which the spring extends and contracts (parallel)”. It is possible to obtain the effect (buffer effect).
This contributes to lowering the cost of the spring and thus lowering the cost of the damper.

From the viewpoint of further reducing the urging force of the spring 150 that supports the slider 140, “the angle formed by the flat surface 5 perpendicular to the approaching and separating directions of the slider 140 and the sliding contact surface 141” is as close to 90 ° as possible. It is desirable.
For example, cos (60 °) = 0.50, cos (70.5 °) ≈0.33, cos (75.5 °) ≈0.25, cos (78.5 °) ≈0.20, cos ( 80 °) ≈0.17 and cos (84 °) ≈0.10, so that “the angle formed by the flat surface 5 perpendicular to the approaching and separating directions of the slider 140 and the sliding contact surface 141” is 60. When the angle is 7 °, 70.5 °, 75.5 °, 78.5 °, 80 °, or 84 °, the spring 150 causes the slider 140 to be “the force by which the cam portion 123 of the arm 120 pushes the slider 140”. It is possible to support with half, one third, one quarter, one fifth, one sixth, and one tenth power.

However, when the “angle formed by the plane 5 perpendicular to the approaching and separating directions of the slider 140 and the slide-side contact surface 141” approaches 90 ° excessively, the slider 140 and the “arm 120” The distance for moving to a position where the “component in the separation direction of the slider 140” in the “force of the cam portion 123 of the slider 123 pushing the slider 140” is excessively long, and as a result, the damper 100 as a whole approaches and separates the slider 140. May become longer.
Therefore, from the viewpoint of preventing the damper 100 from becoming long in the approaching direction and the separation direction of the slider 140 while using a spring (biasing member) having a small spring constant as much as possible, the spring 150 causes the slider 140 to “cam the arm 120. It is preferable that each of the portions 123 is supported by one or more of the force of “the force pressing the slider 140”, and thus “the angle formed by the plane 5 perpendicular to the approaching and separating directions of the slider 140 and the slide-side contact surface 141” Is preferably set to 84 ° or less.

  Further, the damper 100 weakens the impact when the lower surface of the original cover 3 contacts the arm 120 by making the inclination angle θ1 of the main contact surface 141a larger than the inclination angle θ2 of the introduction contact surface 141b. As a result, it is possible to prevent the original press plate 3 from bouncing (bounce back) against the damper 100 when the lower surface of the original press plate 3 contacts the arm 120, and the damper 100 can smoothly receive the original press plate 3. It is said.

More specifically, since the inclination angle θ2 of the introduction contact surface 141b is smaller than the inclination angle θ1 of the main contact surface 141a, “the component in the separation direction of the slider 140 (= F2) of the force acting on the introduction contact surface 141b. × cos (θ2)) ”is larger than the“ component in the separation direction of the slider 140 (= F1 × cos (θ1)) ”of the force acting on the main contact surface 141a.
Therefore, the force F1 acting on the main contact surface 141a and the force F2 acting on the introduction contact surface 141b are the same magnitude and the position of the slider 140 is the same (the biasing force Fs of the spring 150 is the same). ), The ratio of the “component in the separation direction of the slider 140” to the biasing force of the spring 150 when the cam surface 123a of the cam portion 123 of the arm 120 contacts the introduction contact surface 141b (= F2 × cos) (Θ2) / Fs) is the ratio of the “component in the separation direction of the slider 140” to the biasing force of the spring 150 when the cam surface 123a of the cam portion 123 of the arm 120 contacts the main contact surface 141a (= F1 × cos (θ1) / Fs).
Therefore, in the bumper 100 of this embodiment, the cam surface 123a of the cam portion 123 is temporarily compared with the case where the cam surface 123a is in contact with the main contact surface 141a from the beginning (from the time when the arm 120 starts to rotate in the reverse direction). The reaction force exerted by the arm 120 on the original cover 3 when the cam surface 123a comes into contact with the main contact face 141a is made relatively small to prevent the original cover 3 from bouncing against the damper 100. Is possible.

  As the rotation of the arm 120 in the reverse direction proceeds, the portion 8 that contacts the cam surface 123a of the cam portion 123 on the slide-side contact surface 141 of the slider 140 changes from the introduction contact surface 141b to the main contact surface 141a. Since the slider 140 moves, the slider 140 moves to a position where the urging force of the spring 150 that is originally required is generated.

In this embodiment, the inclination angle θ2 of the introduction contact surface 141b with respect to the flat surface 5 gradually increases from the front end portion to the rear end portion of the introduction contact surface 141b, and the main contact with the rear end portion of the introduction contact surface 141b. The front end portion of the contact surface 141a is smoothly connected.
With this configuration, the movement of the portion 8 that contacts the cam surface 123a of the cam portion 123 from the introduction contact surface 141b to the main contact surface 141a on the slide-side contact surface 141 of the slider 140 is smoothly performed. Therefore, when the lower surface of the original cover 3 is brought into contact with the arm 120, the original cover 3 is prevented from bouncing (bounces back) against the damper 100, and the damper 100 has an effect of smoothly receiving the original cover 3. It is possible to increase.

In the present embodiment, the introduction contact surface 141b is formed as a downwardly convex curved surface so that the inclination angle θ2 of the introduction contact surface 141b with respect to the plane 5 is directed from the front end portion to the rear end portion of the introduction contact surface 141b. The rear end portion of the introduction contact surface 141b and the front end portion of the main contact surface 141a can be smoothly connected. However, the present invention is not limited to this.
For example, the introduction contact surface is stepped or sawed, or a plurality of planes having different inclination angles with respect to the plane perpendicular to the approaching direction and the separation direction of the slide member are connected in order from the smallest to the largest. It may be a different shape.

The two objects (the first object and the second object) according to the present invention are not limited to those that are rotatably connected to each other as in the present embodiment.
Another embodiment of the two objects according to the present invention includes, for example, two articles that can be relatively approached and separated while maintaining the posture by a guide rail or the like.

Although the case 110, the arm 120, and the slider 140 of this embodiment are all manufactured by integrally molding a resin material, the present invention is not limited to this.
For example, at least one of the fixed member, the rotating member, and the slide member may be manufactured from a metal material. Examples of a method for manufacturing these members from a metal material include a method of integrally forming by die casting, cutting a block-shaped metal material, and appropriately bending a metal plate.

In this embodiment, the case 110 of the damper 100 is fixed to the main body 2, and when the original cover 3 is brought into contact with the arm 120, an impact when the original cover 3 is closed (contacted) with respect to the main body 2 is buffered. However, the present invention is not limited to this.
For example, the case 110 of the damper 100 may be fixed to the document crimping plate 3, and the impact when the document crimping plate 3 closes (contacts) against the main body 2 may be buffered by the main body 2 contacting the arm 120. .

In the present embodiment, the slider 140 when the external force from the document pressing plate 3 is not acting on the arm 120 by the fitting protrusions 143 and 144 of the slider 140 coming into contact with the rear end portions of the end surfaces of the fitting grooves 111e and 111f. 140 determines the position in the “approach direction (rear) of the slider 140” and the posture of the arm 120 and prevents the slider 140 from dropping out of the storage chamber 116, but the present invention is not limited to this.
For example, as shown in FIG. 12, a through-hole 117L that penetrates in the left-right direction is formed in the side plate 112L at a position that is above the through-hole 113L, and a side plate 112R that penetrates in a left-right direction at a position that is behind the through-hole 113R. The same effect can also be obtained by forming a through hole 117L that is formed in a cylindrical shape, and a columnar regulating pin 160 extending in the left-right direction is inserted into the through hole 117L and the through hole 117L so as not to fall off.
More specifically, when the arm 120 abuts on the restriction pin 160, the arm 120 is further restricted from rotating in the positive direction, and the slider 140 abutting on the cam portion 123 of the arm 120 is further “slider”. The movement in the “140 approach direction” is restricted.
With this configuration, the fitting grooves 111e and 111f and the fitting protrusions 143 and 144 in FIG. 2 can be omitted.

  Below, the damper 200 which is 2nd embodiment of the damper based on this invention is demonstrated using FIGS. 7-11.

The damper 200 is applied to the scanner 1 shown in FIG.
The scanner 1 is an embodiment of office equipment, and includes a main body 2, an original cover 3, a hinge 4, and a damper 200.
In the present embodiment, the scanner 1 shown in FIG. 9 has basically the same configuration as the scanner 1 shown in FIG. 1 except that the damper 100 is replaced with the damper 200. Therefore, the scanner 1 shown in FIG. The detailed description of is omitted.

The damper 200 cushions an impact when the original cover 3 is closed (contacted) with respect to the main body 2.
As shown in FIG. 9, the damper 200 is accommodated in a damper accommodation hole 2 a formed in the main body 2. The damper accommodating hole 2a is opened at a position that is a front-rear halfway portion and a left end portion on the upper surface of the main body 2.

  As shown in FIG. 10, the damper 200 includes a case 210, an operating pin 220, a slider 240, and a spring 250.

Below, the detail of case 210 is demonstrated using FIG. 10 and FIG.
Case 210 is an embodiment of a fixing member according to the present invention.
As shown in FIG. 11, the case 210 is a rectangular parallelepiped member that is slightly long in the front-rear direction, and is manufactured by integrally molding a resin material.
The case 210 includes a lower plate 211, side plates 212L and 212R, an upper plate 214, a front plate 215, and a support plate 217.

The lower plate 211 is a member that forms the lower part of the case 210. Through holes 211a, 211b, 211c, and 211d are formed in the lower plate 211. The lower plate 211 is formed with fitting grooves 211e and 211f.
Since the shape of the lower plate 211 is basically the same as the shape of the lower plate 111 shown in FIG. 5, detailed description of the shape of the lower plate 211 is omitted.

The side plate 212L is a member that forms the left side portion of the case 210. The side plate 212L of the present embodiment is a plate-like member having a pair of left and right plate surfaces (left surface and right surface), and the lower plate 211 obliquely cuts the rear upper part of a rectangle that is long in the front-rear direction in a side view, and It is the shape which provided the protrusion which protrudes upwards in the latter half part (part corresponding to the front-end part of the cut-out part) of the upper side of the said rectangle.
The lower end portion of the side plate 212L is connected to a position that becomes the left end portion and the front and rear center portion of the lower plate 211.
The side plate 212L of the present embodiment is shorter in the front-rear direction than the lower plate 211, and the front end of the lower plate 211 (portion where the through holes 211c and 211d are formed) protrudes forward from the front end of the side plate 212L. The rear end portions (portions where the through holes 211a and 211b are formed) protrude rearward from the rear end portions of the side plates 212L.

The side plate 212 </ b> R is a member that forms the right side portion of the case 210. The lower end portion of the side plate 212R is continuous with the right end portion of the lower plate 211 and the position of the front and rear center portion.
Since the side plate 212R of the present embodiment has a symmetrical shape with respect to the side plate 212L, a detailed description of the shape of the side plate 212R is omitted.

  The upper plate 214 is a member that forms the upper part of the case 210. The upper plate 214 of this embodiment is a plate-like member having a pair of upper and lower plate surfaces (upper surface and lower surface), and the planar view shape of the upper plate 214 is a rectangle that is slightly long in the front-rear direction. The left end portion of the upper plate 214 is connected to the front half of the side plate 212L (the portion on the front side of the “protrusion of the rear half of the upper side” of the side plate 212L). The right end of the upper plate 214 is connected to the front half of the side plate 212R.

  The front plate 215 is a member that forms the front portion of the case 210. The front plate 215 of this embodiment is a plate-shaped member having a pair of front and rear plate surfaces (front and rear surfaces), and the front view shape of the front plate 215 is a rectangle that is slightly long in the left-right direction. The left and right ends of the front plate 215 are connected to the front end of the side plate 212L and the front end of the side plate 212R, respectively, and the upper and lower ends of the front plate 215 are respectively the front end of the upper plate 214 and the front half of the lower plate 211 (in the lower plate 211). A portion that is slightly behind the portion where the through holes 211c and 211d are formed.

The support plate 217 is an embodiment of the support portion according to the present invention. The support plate 217 is a plate-shaped portion having a pair of upper and lower plate surfaces, and the left and right end portions of the support plate 217 are connected to portions corresponding to “protrusions protruding upward” in the side plates 212L and 212R, respectively. The front end portion is continuous with the rear end portion of the upper plate 214.
A through hole 217 a is formed in the support plate 217. The through hole 217a is disposed at the center in the front-rear direction and the left-right direction of the support plate 217, and penetrates up and down from the upper surface to the lower surface of the support plate 217.

A storage chamber 216 is formed in the case 210.
The storage chamber 216 is an embodiment of the storage chamber according to the present invention. The storage chamber 216 of the present embodiment is a space surrounded by the lower plate 211, the side plates 212L and 212R, the upper plate 214, the front plate 215, and the support plate 217.
The storage chamber 216 has “an inner peripheral surface of the storage chamber 216” and “a bottom surface of the storage chamber 216”.
More specifically, the portion of the upper surface of the lower plate 211 sandwiched between the side plates 212L and 212R, the right surface of the side plate 212L, the left surface of the side plate 212R, the lower surface of the upper plate 214, and the lower surface of the support plate 217 The rear surface of the front plate 215 forms the “bottom surface of the storage chamber 216”.
The storage chamber 216 has an “opening of the storage chamber 216” communicating with the outside of the case 210. More specifically, a combination of the rear end portions of the side plates 212L and 212R, the rear end portion of the support plate 217, and the rear portion of the upper surface of the lower plate 211 than the portion where the through holes 211a and 211b are formed. Constitutes the peripheral edge of the “opening of the storage chamber 216”.

Below, the detail of the action | operation pin 220 is demonstrated using FIG.
The operating pin 220 is an embodiment of the moving member according to the present invention.
The actuating pin 220 of this embodiment is a rod-like member extending substantially in the vertical direction, and includes a body rod 221, a first contact ball 222, and a second contact ball 223.

The body rod 221 is a member that forms the main structure of the operating pin 220. The body rod 221 of the present embodiment is a round bar (columnar member) made of a metal material such as stainless steel, and a male screw is provided at one end (upper end) and the other end (lower end) of the body rod 221. (Not shown) is formed.
Further, the outer diameter of the body rod 221 is slightly smaller than the through hole 217 a formed in the support plate 217 of the case 210.

The first contact ball 222 and the second contact ball 223 are both spherical members made of a metal material such as stainless steel. The diameters of the first contact ball 222 and the second contact ball 223 are larger than the outer diameter of the body rod 221. Screw holes (not shown) are formed in the first contact ball 222 and the second contact ball 223, respectively.
One end (upper end) of the body rod 221 is screwed into a screw hole formed in the first contact ball 222, so that the first contact ball 222 is fixed to one end (upper end) of the body rod 221. Is done.
The other end portion (lower end portion) of the body rod 221 is screwed into a screw hole formed in the second contact ball 223 so that the second contact ball 223 becomes the other end portion (lower end portion) of the body rod 221. Fixed to.

  The operating pin 220 is inserted into the through hole 217a. As a result, the operating pin 220 maintains the state in which the outer peripheral surface of the body rod 221 is in contact with the inner peripheral surface of the through-hole 217a, and the vertical direction (the direction in which the operating pin 220 protrudes from the case 210 and the case 210 are immersed). The case 210 is supported by the case 210 so that it can move in the direction) and cannot be removed from the case 210.

When the operation pin 220 is supported by the case 210, the first contact ball 222 is disposed above the support plate 217, and the second contact ball 223 is disposed below the support plate 217.
In other words, when the operation pin 220 is supported by the case 210, the first contact ball 222, that is, one end portion (upper end portion) of the operation pin 220 protrudes from the case 210 above the case 210. Further, the second contact ball 223, that is, the other end portion (lower end portion) of the operation pin 220 is held in a state of being arranged in the opening portion of the accommodation chamber 216.

  In the following description, “the operation pin 220 moves in the positive direction with respect to the case 210” means “the operation pin 220 moves upward with respect to the case 210”, and “the operation pin 220 is in the case. “Move in the opposite direction with respect to 210” means that “the operating pin 220 moves downward with respect to the case 210”.

Below, the detail of the slider 240 is demonstrated mainly using FIG.7, FIG8 and FIG.10.
7 and 8 is an embodiment of the slide member according to the present invention. The slider 240 is manufactured by integrally molding a resin material.
A slide-side contact surface 241 is formed on the slider 240. The slide-side contact surface 241 is a combination of the main contact surface 241a and the introduction contact surface 241b. A spring receiving hole 242 is formed on the front surface of the slider 240. Fitting protrusions 243 and 244 are formed at the lower rear portion of the slider 240.
Since the shape of the slider 240 of this embodiment is the same as that of the slider 140 in the damper 100 shown in FIG. 4, detailed description of the shape of the slider 240 is omitted.

As shown in FIG. 10, the slider 240 is housed in the housing chamber 216 of the case 210.
When the slider 240 is stored in the storage chamber 216, the outer peripheral surface of the slider 240 abuts on the inner peripheral surface of the storage chamber 216. More specifically, the upper surface, the lower surface, the left surface, and the right surface of the slider 240 are in contact with the lower surface of the upper plate 214, the upper surface of the lower plate 211, the right surface of the side plate 212L, and the left surface of the side plate 212R, respectively.
As a result, the slider 240 is supported by the case 210 so as to be movable in the front-rear direction. More specifically, the slider 240 housed in the housing chamber 216 can move in the front-rear direction with respect to the case 210, but the slider 240 housed in the housing chamber 216 moves in the vertical direction and the case 210. It cannot move in the left-right direction and cannot rotate with respect to the case 210.

Here, in the present embodiment, the direction in which the slider 240 accommodated in the accommodation chamber 216 approaches the operation pin 220 supported by the case 210 so as to be movable in the vertical direction (rearward in the present embodiment) is referred to as “the slider 240. The direction in which the slider 240 accommodated in the accommodation chamber 216 moves away from the operating pin 220 supported so as to be movable in the vertical direction (in the present embodiment) is defined as “the approach direction”. The movement of the slider 240 accommodated in the accommodation chamber 216 will be described using these directions.
That is, the slider 240 moves in the “protruding direction of the slider 240” by moving in a direction protruding from the opening of the storage chamber 216 to the outside of the case 210 while being in contact with the inner peripheral surface of the storage chamber 216. The slider moves in the “separating direction of the slider 240” by moving from the opening of the storage chamber 216 in the direction of immersing into the storage chamber 216 while being in contact with the inner peripheral surface of 216.

Of the inner peripheral surface of the storage chamber 216, at least a portion (in this embodiment, the upper surface of the lower plate 211) opposite to the portion facing the slide-side contact surface 241 of the slider 240 has a lubricant (for example, grease). ) Is applied.
Therefore, when the slider 240 is accommodated in the accommodating chamber 216, a contact portion between the lower surface of the slider 240 and the upper surface of the lower plate 211 (which will be described in detail later, external force from the original cover 3 is applied to the operating pin 220. Then, the friction at the portion where a large force acts on the slider 240 is reduced by the lubricant.

Below, the detail of the spring 250 is demonstrated using FIG.
The spring 250 is an embodiment of the biasing member according to the present invention.
The spring 250 of the present embodiment is a winding spring made of a metal material, and is a compression spring (a spring used in a compressed state).
As shown in FIG. 10, the spring 250 is housed in the housing chamber 216 of the case 210.

One end (front end) of the spring 250 accommodated in the accommodation chamber 216 contacts the bottom surface (rear surface of the front plate 215) of the accommodation chamber 216, and the other end (rear end) of the spring 250 is the accommodation chamber of the case 210. It abuts against the slider 240 accommodated in 216 (more specifically, it is inserted into the spring receiving hole 242 of the slider 240 and abuts against the bottom surface of the spring receiving hole 242).
The spring 250 urges the slider 240 in a direction protruding from the opening of the housing chamber 216 to the outside of the case 210, that is, “an approaching direction (rearward) of the slider 240”, and the sliding contact surface 241 of the slider 240 is actuated as an operating pin. The second contact ball 223 of 220 is brought into contact with the outer peripheral surface (spherical surface).
As a result, the urging force of the spring 250 (the force that the spring 250 elastically deformed in the compression direction tries to return to its original shape) is transmitted to the operating pin 220 through the slider 240, and the operating pin 220 moves upward from the case 210. It is biased in the protruding direction.
In this manner, the spring 250 applies a force that moves the operating pin 220 in the positive direction.

  Hereinafter, the behavior of the damper 200 when the original cover 3 is closed (contacted) with respect to the main body 2 will be described mainly with reference to FIGS. 9 and 10.

As shown in FIG. 9A, the original cover 3 is sufficiently open with respect to the main body 2, and the distance from the front end portion of the upper surface of the main body 2 to the front end portion of the lower surface of the original cover 3 is a predetermined distance. (In the case of this embodiment, when it is larger than the distance L2 in FIG. 9B), the original cover 3 is not in contact with the arm 120 (separated from the operating pin 220).
Accordingly, when the document crimping plate 3 is sufficiently open with respect to the main body 2, an external force from the document crimping plate 3 (in this embodiment, the document crimping plate 3 is actuated by the weight of the document crimping plate 3. The force that pushes down) does not act on the operating pin 220.

As shown in FIG. 10A, when the original cover 3 is not in contact with the operating pin 220 and the external force from the original cover 3 is not acting on the operating pin 220, the slider 240 is attached with a spring 250. It moves in the “approach direction (rearward) of the slider 240” by the force, and the fitting protrusions 243 and 244 are arranged at positions where they contact the rear end portions of the end faces of the fitting grooves 211e and 211f.
The operation pin 220 is held at a position where the outer peripheral surface of the second contact ball 223 contacts the introduction contact surface 241 b of the slide-side contact surface 241 of the slider 240.
When the original cover 3 is not in contact with the operation pin 220, one end portion of the operation pin 220 (first contact ball 222) is disposed at a position above the upper surface of the main body 2.

  As shown in FIG. 9B, the direction in which the original cover 3 is closed with respect to the main body 2 from the state in which the original cover 3 is sufficiently open with respect to the main body 2 (the state shown in FIG. 9A). When the distance from the front end portion of the upper surface of the main body 2 to the front end portion of the lower surface of the document crimping plate 3 decreases to a distance L2 (turned counterclockwise as viewed from the left side), the document is crimped. The lower surface of the plate 3 contacts the outer peripheral surface of the first contact ball 222 of the operating pin 220.

From the state shown in FIG. 9B, the original cover 3 is further rotated in the closing direction with respect to the main body 2, and the distance from the front end of the upper surface of the main body 2 to the front end of the lower surface of the original cover 3 is a distance. When the pressure is smaller than L2, the external force from the original cover 3 is applied to the operating pin 220, and the original is pressed while the lower surface of the original cover 3 is in contact with the outer peripheral surface of the first contact ball 222. The plate 3 pushes the operating pin 220 downward.
As a result, the operating pin 220 moves in the opposite direction (downward) with respect to the case 210.

When the external force from the document pressing plate 3 acts on the operating pin 220 and the operating pin 220 moves in the opposite direction (downward) with respect to the case 210, the second contact is applied to the slide-side contact surface 241 of the slider 240. The portion 9 that contacts the outer peripheral surface of the contact ball 223 moves from the introduction contact surface 241 b to the main contact surface 241 a (see FIGS. 10A and 10B), and the slider 240 receives the second contact of the operating pin 220. It is pushed by the contact ball 223 and moves in the “separating direction of the slider 240 (forward)”.
As a result, the spring 250 is compressed (elastically deformed), and the biasing force of the spring 250, that is, the force with which the spring 250 biases the slider 240 in the approaching direction (rearward) of the slider 240 increases.
In this way, a part of the energy (positional energy and kinetic energy of the original cover 3) that acts on the operating pin 220 from the original cover 3 is converted into the elastic energy of the spring 250 and stored in the spring 250. As a result, the speed (angular speed) at which the document pressing plate 3 rotates in the closing direction with its own weight relative to the main body 2 is reduced (compared to the case where the damper 200 is removed from the scanner 1).

As shown in FIG. 9C and FIG. 10B, the original cover 3 is further rotated with respect to the main body 2 in the closing direction, and the lower surface of the original cover 3 comes into contact with the upper surface of the main body 2. At this time, the original cover 3 is stopped without being able to rotate further in the closing direction, and is stopped, and the original cover 3 is closed with respect to the main body 2.
The speed (angular speed) at which the original pressure plate 3 rotates in the closing direction with respect to the main body 2 when the lower surface of the original pressure plate 3 contacts the upper surface of the main body 2 is loosened by the damper 200. The impact when the lower surface of the document pressing plate 3 comes into contact with the upper surface of the main body 2 is reduced (compared to the case where the damper 200 is removed from the scanner 1).

By configuring the damper 200 as described above, the damper 200 has the same effect as the damper 100.
That is, the component configuration of the damper 200 can be simplified as compared with the component configuration of the conventional oil damper.
The damper 200 is equivalent to a conventional shock absorber using a spring that has a smaller spring constant than that of a shock absorber in which the direction in which an external force acts and the direction in which the spring expands and contracts are parallel (matches). The effect (buffering effect) can be obtained, and this contributes to lowering the cost of the spring and consequently lowering the cost of the damper.
Further, the impact when the lower surface of the original cover 3 is in contact with the operating pin 220 is weakened. As a result, the original cover 3 is bound to the damper 200 when the lower surface of the original cover 3 is in contact with the operating pin 220. (Bounce back) is prevented, and the damper 200 can smoothly receive the original cover 3.

In the present embodiment, the forward direction and reverse direction (upward and downward directions), which are the directions in which the operating pin 220 moves, are perpendicular to the approach direction and separation direction (backward and forward), which are the directions in which the slider 140 moves. However, the present invention is not limited to this.
In other words, the direction in which the moving member moves (forward direction and reverse direction) and the direction in which the slide member moves (approach direction and separation direction) are different (if they are not parallel).
However, from the viewpoint of making the urging force of the urging member smaller than the force that moves the moving member in the reverse direction (external force from the second object), the direction in which the moving member moves (forward direction and reverse direction) and slide The angle formed by the direction in which the member moves (the approaching direction and the separating direction) is approximately 90 ° (preferably within the range of 70 ° to 110 °).

1 Scanner 2 Body (first object)
3 Original pressure plate (second object)
4 Hinge 100 Damper (first embodiment)
110 Case (fixing member)
120 arm (rotating member)
123 Cam part 130 Rotating pin 140 Slider (sliding member)
141 Slide side contact surface 141a Main contact surface 141b Introduction contact surface 150 Spring (biasing member)

Claims (8)

A damper for buffering an impact when the second object comes into contact with the first object,
A fixing member fixed to the first object;
A rotating member that includes a cam portion and is connected to the fixed member so as to be rotatable in a forward direction and a reverse direction;
A slide member supported by the fixed member so as to be movable in an approach direction that is a direction approaching the rotation member and a separation direction that is a direction away from the rotation member;
One end part contacts the fixed member, the other end part contacts the slide member, and the slide member is urged in the approaching direction to bring the slide member into contact with the cam part. A biasing member that applies torque to the rotating member so that the member rotates in the positive direction with respect to the fixed member;
Comprising
The slide member is formed with a slide-side contact surface that is inclined with respect to a surface perpendicular to the approach direction and the separation direction and contacts the cam portion.
Damper. Of the slide side contact surface, the portion closer to the approach direction forms a main contact surface,
Of the slide-side contact surface, a portion closer to the separation direction forms an introduction contact surface continuous with the main contact surface,
The inclination angle of the main contact surface with respect to the surface perpendicular to the approach direction and the separation direction is larger than the inclination angle of the introduction contact surface with respect to the surface perpendicular to the approach direction and the separation direction,
When the external force from the second object does not act on the rotating member, the cam portion abuts on the introduction abutment surface of the slide side abutment surface,
When an external force from the second object acts on the rotating member and the rotating member rotates in the reverse direction, a portion of the slide-side contact surface that contacts the cam portion is the introduction contact. Moving from the contact surface to the main contact surface, the slide member moves in the separation direction, and the force by which the biasing member biases the slide member in the approaching direction increases.
The damper according to claim 1. The fixing member is formed with a storage chamber that has a bottom surface and an inner peripheral surface and has an opening communicating with the outside, and is a space for storing the slide member and the biasing member.
One end of the urging member abuts on the bottom surface of the storage chamber,
The other end of the urging member abuts on the slide member accommodated in the accommodation chamber,
The slide member moves in the approaching direction by moving in a direction protruding outward from the opening of the storage chamber while contacting the inner peripheral surface of the storage chamber, and contacts the inner peripheral surface of the storage chamber. While moving in the separating direction by moving in the direction of immersing into the interior of the storage chamber from the opening of the storage chamber,
The damper according to claim 1 or claim 2. Of the inner circumferential surface of the storage chamber, a lubricant is applied to a portion on the opposite side of the portion facing the slide-side contact surface of the slide member.
The damper according to claim 3. A damper for buffering an impact when the second object comes into contact with the first object,
A fixing member fixed to the first object;
A movable member supported by the fixed member so as to be movable in a forward direction protruding from the fixed member and a reverse direction immersed in the fixed member, and capable of holding a state in which one end portion protrudes from the fixed member;
An approach direction that is a direction different from the forward direction and the reverse direction and approaches the other end of the moving member, and a direction different from the forward direction and the reverse direction and the other end of the moving member A slide member supported by the fixed member so as to be movable in a separation direction that is a direction away from the slide member;
One end abuts against the fixed member and the other end abuts against the slide member, and biases the slide member in the approaching direction to bring the slide member into contact with the other end of the moving member. An urging member for applying a force to move the moving member in the positive direction;
Comprising
The slide member is formed with a slide-side contact surface that is inclined with respect to a surface perpendicular to the approaching direction and the separation direction and contacts the other end of the moving member.
Damper. Of the slide side contact surface, the portion closer to the approach direction forms a main contact surface,
Of the slide-side contact surface, a portion closer to the separation direction forms an introduction contact surface continuous with the main contact surface,
The inclination angle of the main contact surface with respect to the surface perpendicular to the approach direction and the separation direction is larger than the inclination angle of the introduction contact surface with respect to the surface perpendicular to the approach direction and the separation direction,
When the external force from the second object does not act on the rotating member, the other end of the moving member abuts on the introduction abutment surface of the slide side abutment surface,
When the moving member moves in the opposite direction due to the external force from the second object acting on the moving member, the portion that contacts the other end of the moving member on the slide-side contact surface is the introduction Moving from the contact surface to the main contact surface, the slide member moves in the separation direction, and the force by which the biasing member biases the slide member in the approaching direction increases.
The damper according to claim 5. The fixing member is formed with a storage chamber that has a bottom surface and an inner peripheral surface and has an opening communicating with the outside, and is a space for storing the slide member and the biasing member.
The fixed member is configured such that one end of the moving member protrudes from the fixed member and the other end of the moving member is opposed to the opening of the storage chamber while the moving member is moved in the forward direction and the reverse direction. It has a support part that is movably supported in the direction,
One end of the urging member abuts on the bottom surface of the storage chamber,
The other end of the urging member abuts on the slide member accommodated in the accommodation chamber,
The slide member moves in the approaching direction by moving in a direction protruding outward from the opening of the storage chamber while contacting the inner peripheral surface of the storage chamber, and contacts the inner peripheral surface of the storage chamber. While moving in the separating direction by moving in the direction of immersing into the interior of the storage chamber from the opening of the storage chamber,
The damper according to claim 5 or 6. Of the inner circumferential surface of the storage chamber, a lubricant is applied to a portion on the opposite side of the portion facing the slide-side contact surface of the slide member.
The damper according to claim 7.

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