JP2011090237A - Structure for preventing fall of rotary shaft of cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To use a smaller number of parts than a conventional cover mechanism comprising a cover having a rotary shaft, a biasing member, a housing including a bearing part, and a rotary shaft fall preventing member (two members are required for clamping right and left sides of the rotary shaft of the cover). <P>SOLUTION: A housing including a biasing member and a bearing member is provided with a function of preventing fall when a force to drop a rotary shaft is applied. There is no need of the two rotary shaft fall preventing members. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to prevention of falling off of a rotating shaft of a lid.

A conventional reversing lid mechanism is constituted by a rotating shaft, a lid, a biasing member, a housing including a bearing member, and a rotating shaft drop-off preventing member (two members are necessary to sandwich the left and right sides of the lid rotating shaft). (For example, see Non-Patent Document 1)
Hereinafter, a conventional lid rotation axis drop prevention mechanism will be described with reference to FIG. 4a.

  The rotating shaft 413 is assembled to the lid 412 first, and the rotating shaft 413 is assembled so as to be fitted to the bearing portion of the housing 411 including the bearing member in that state. Thereafter, the rotation shaft 413 is sandwiched between the housing 411 including the bearing member and the drop-off prevention members 414 and 415 so that the rotation shaft 413 does not fall off, and the drop-off prevention member 414 is fastened with the screws 416. Thereafter, the biasing member 417 is fastened to the lid 412 and fastened to the housing 411 including the bearing member with the screw 418. At this time, the urging member 417 simultaneously urges the drop-off prevention member 415 and presses the drop-off prevention member 415 against the housing 411 including the bearing member, thereby preventing the rotation shaft 413 from falling off.

  Further, a structure in which the drop prevention members 414 and 415 are eliminated and the lid 412 is pressed only by the urging member 417 is also conceivable. A cross-sectional view in this case is shown in FIG. However, in this case, if the distance obtained by subtracting the diameter of the rotating shaft portion from the depth of the bearing portion 419 is β, the rotating shaft 413 falls off when the lid 412 is pushed in the ε direction by a distance β or more.

Patent No. 4003168

Video SALON Genkosha 2009/05 p117

  However, the conventional example has a problem in that the number of parts is large because the rotary shaft drop prevention members 414 and 415 (two parts) are necessary to prevent the rotary shaft from falling off. Moreover, there is a problem that the rotating shaft of the lid is dropped simply by eliminating the rotating shaft falling prevention members 414 and 415.

The rotating shaft fall-off preventing mechanism of the present invention has a lid that can be opened and closed, and the lid is a single-shaft rotating shaft portion, and the finger-hanging portion is camped on the opposite side of the rotating shaft portion when the lid is opened and closed. Has a shape,
An urging member that always urges the cam shape at a fixed end;
In a rotary lid mechanism having a housing including a bearing member that receives the rotation shaft portion, the locus of the biasing member is escaped, and the biasing member is pushed beyond the locus in a direction in which the rotation shaft portion is removed. The receiving portion of the biasing member is formed from a housing including the bearing member at a position where the biasing portion is not plastically deformed,
When the distance between the maximum locus of the locus and the receiving portion of the biasing member is α and the distance obtained by subtracting the diameter of the rotating shaft portion from the depth of the bearing member is β , Β> α.

  Another feature of the present invention is that the receiving portion of the urging member is disposed on the opposite side to the fixed portion of the urging portion with the rotating shaft portion interposed therebetween.

  Another feature of the present invention is that the biasing member is a leaf spring, and the vicinity of the leaf spring contacting the receiving portion of the biasing portion is bent in a direction opposite to the displacement direction of the spring. It has a surface shape

  As described above, according to the present invention, it is possible to prevent the lid from falling off the rotating shaft by using the casing including the existing lid, the urging member, and the bearing member. Therefore, the conventional rotary shaft drop-off prevention members 414 and 415 (2 parts) can be eliminated, and the number of parts has been reduced. Along with this, it has become possible to abolish the screw that holds the rotating shaft falling prevention member.

1a is a component configuration diagram of the present embodiment, and 1b, 1c, and 1d are detailed diagrams of a single component of the component shown in 1a. 1 shows a state in which the components shown in FIG. 1 are assembled. 2a shows a state in the middle of attaching the lid 11 to the housing 13, and 2b shows a state in which the biasing member 12 is attached in the state 2a. FIG. 2B is a cross-sectional view when all the components are assembled as shown in FIG. 2B. 3A is a cross-sectional view when the biasing member 12 is at the maximum displacement. It is sectional drawing in the case of pushing in the direction to drop off. FIG. 4B is a sectional view of a conventional example.

  FIG. 1a is a component configuration diagram of the present embodiment. 11 is a lid that can be opened and closed with a rotating shaft, 12 is an urging member (here, a leaf spring), 13 is a housing including a bearing member, and 14 is a screw for fixing the urging member 12 to one end.

  FIGS. 1b, 1c, and 1d are detailed single parts of the part shown in FIG. 1a.

  The lid 11 that can be opened and closed has a uniaxial rotary shaft portion 111 and a cam shape 113 at a position opposite to the finger hook portion 112 when the lid is opened and closed with the rotary shaft portion 111 interposed therebetween.

  The urging member 12 is fixed at one end by a fixing portion 121 to become a cantilever spring, and always urges the cam shape 113. Further, a receiving portion 122 on the biasing portion 12 side corresponding to the receiving portion 132 of the biasing member 12 on the housing 13 side including the bearing member described later is provided. The receiving portion 122 is provided at the tip of the urging member 12 at two points 123 at the tip of the contact portion with the cam shape 113. A positioning and steadying portion 124 for the housing 13 is provided.

  The housing 13 including the bearing member includes a bearing portion 131 that receives the rotation shaft portion 111 of the lid 11. In addition, when the biasing member 12 escapes from the locus of the biasing member 12, and when the biasing member 12 is pushed beyond the maximum locus in the direction in which the rotary shaft portion 111 is removed, the biasing portion 12 is biased to a position where it does not undergo plastic deformation. A receiving portion 132 for the biasing member 12 is also provided. Further, an opening 133 necessary for assembling the lid 11 is also provided. A positioning and steadying portion 134 for the biasing member 12 is also provided.

  FIG. 2 shows how the parts shown in FIG. 1 are assembled.

  FIG. 2a shows a state in the middle of attaching the lid 11 that can be opened and closed to the housing 13 including the bearing member. The housing 13 including the bearing member has an opening 133 that is slightly larger than the thickness of the lid 11 that can be opened and closed, and the lid that can be opened and closed so that the opening 133 can be passed from the opposite side (direction of arrow λ). Assemble 11. At this time, the rotation shaft portion 111 of the lid is slidably fitted to the bearing portion 131 of the housing in the vertical direction on the paper surface.

  FIG. 2b shows a state where the urging member 12 is attached to the state of FIG. 2a. The urging member 12 is adapted to fit the positioning and steadying portion 124 of the urging member to the positioning and steadying portion 134 of the casing while inserting the receiving portion 122 on the biasing member side into the receiving portion 132 on the casing side. Include. Then, in order to fix the urging member 12, the screw 14 is fastened to the fixing portion 121 of the urging member.

  FIG. 3 is a sectional view A_A of FIG. 2b.

  FIG. 3a is a cross-sectional view when the urging member 12 reaches the maximum displacement. At this time, in the direction ε in which the rotating shaft portion 111 is removed, the distance between the receiving portion 122 on the biasing member side and the receiving portion 132 on the housing side is α, and the distance obtained by subtracting the diameter of the rotating shaft portion from the depth of the bearing portion If β is α, α> 0 and β> α so that the locus of the urging member 12 is not disturbed, and the urging is performed even if the lid 11 is pushed in the direction ε in which the rotary shaft 111 is dropped. Since the receiving portion 122 on the biasing portion side contacts the receiving portion 132 of the housing via the member 12, it is possible to prevent the rotating shaft 111 from falling off.

  FIG. 3b is a cross-sectional view of the case where the rotary shaft 111 is moved by pushing the lid 11 in the direction ε in which the rotary shaft portion 111 drops off. It can be seen that the receiving portions 132 and 122 of the housing and the urging portion are in contact with each other to prevent the rotating shaft portion from falling off.

  Alternatively, the receiving portions 132 and 122 of the casing and the urging portion are arranged on the opposite side of the urging portion 12 from the fixing portion 121 with the rotating shaft portion 111 interposed therebetween. As a result, when the lid 12 is pushed, the urging portion 12 becomes a beam fixed at both ends, and it is possible to prevent the rotating shaft portion 111 from falling off more strongly than received at other places.

  Further, the biasing member 12 is in contact with the receiving portion 311 of the biasing portion in the direction ε in which the rotary shaft portion 111 is dropped, and the vicinity of the receiving portion 122 on the biasing portion side has a locus smaller than the locus in the flat plate state. There are 123 additional bends. As a result, the trajectory becomes smaller and a space can be reduced.

  Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included. A part of the above-described embodiments may be appropriately combined.

11 Openable / closable lid with rotating shaft
111 Rotating shaft
112 Finger rest
113 Cam shape
12 Biasing member (here leaf spring)
121 fixed part
122 Receiver
123 2 bending points
124 Positioning and steady rest
13 Housing including bearing
131 Bearing
132 Receiver
133 opening
134 Positioning and steady rest
14 Screw for fixing the urging member 12 to the end α Distance between the receiving portion 122 on the urging member side and the receiving portion 132 on the housing side β Distance obtained by subtracting the diameter of the rotating shaft portion from the depth of the bearing portion ε Rotating shaft Direction that part 111 falls off λ Installation direction of lid
411 Housing including bearing member
412 lid
413 rotation axis
414,415 Rotary shaft dropout prevention member
416 screw
417 Biasing member
418 screw
419 Bearing

Claims (3)

The lid has an openable and closable lid, the lid has a single-shaft rotary shaft portion, and a finger-hanging portion when opening and closing the lid has a cam shape on the opposite side across the rotary shaft portion,
An urging member that always urges the cam shape at a fixed end;
In a rotary lid mechanism having a housing including a bearing member that receives the rotation shaft portion, the locus of the biasing member is escaped, and the biasing member is pushed beyond the locus in a direction in which the rotation shaft portion is removed. The receiving portion of the biasing member is formed from a housing including the bearing member at a position where the biasing portion is not plastically deformed,
When the distance between the maximum locus of the locus and the receiving portion of the biasing member is α and the distance obtained by subtracting the diameter of the rotating shaft portion from the depth of the bearing member is β , Β> α, and the structure for preventing the rotation axis of the lid from falling off.   2. The structure for preventing a rotating shaft from falling off the lid according to claim 1, wherein the receiving portion of the biasing member is disposed on the opposite side of the fixing portion of the biasing portion across the rotating shaft portion.   The biasing member is a leaf spring, and the vicinity of the leaf spring in contact with the receiving portion of the biasing portion has a stepped surface shape bent in a direction opposite to the displacement direction of the spring. And the rotating shaft drop-off prevention structure of the lid according to claim 2.

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