Loose-leaf binder

A technology of a binder and a fulcrum, applied in the field of binders, can solve problems such as loose pages, problems with manufacturing time or cost, rust, etc., and achieve the effect of solving weight, solving manufacturing time and cost.

Active Publication Date: 2009-02-25
金田克已
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the binder of this structure, in addition to preparing spring members with different sizes and spring forces or lengths for the binder, a more complicated structural part must be carefully designed so that on the shaft member and the base material, Assembling the above-mentioned spring member without detaching from the base material and without impairing the effective spring action, there is a problem in terms of manufacturing time or cost, and there is also a problem that a metallic shaft is used in order to improve the durability of the coil spring-related members. component, which can cause weight gain or rust
In addition, it takes labor and time to sort metal springs when they are discarded
In addition, especially the technology of the above-mentioned Japanese Patent No. 3749893 has the following problem. If the ring is opened, the semi-rings will be opened suddenly, causing the bound loose-leaf to be scattered.
[0005] On the one hand, although as explained in Japanese Patent No. 3407672 (Patent Document 2), especially paragraph (0024), the following binder is proposed, which is provided with a low protrusion on the outer periphery of the shaft body, and the bearing A concave-convex sliding joint corresponding to the low protrusion is formed on the inner periphery of the part. Through the contact action between the low protrusion and the sliding joint, the rotation of the shaft body has a moderate sense, but the low protrusion is only used to make the shaft body Although it is described that paper can be taken out or put in at a predetermined position (paragraph 0032), it does not have sufficient braking force to stop at a predetermined position, and cannot provide a substitute for promoting ring opening. previous spring force for closing action

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] The fulcrum 22 of the binder of the first embodiment has a triangular cam 38 at an intermediate position in the longitudinal direction, and the triangular cam 38 has a front cam 34 and a rear cam 36 ( When the movable ring 30 is opened, the former is "front", and the latter is "rear"). On the other hand, the base body 16 has a front cam 34 and a rear cam 36 that are arranged at different rotational positions when the fulcrum 22 is rotated. The first locking portion 40 and the second locking portion 42 that are in contact.

[0086] The front cam 34 and the rear cam 36 are provided at an intermediate position in the longitudinal direction of the support shaft 22, and the first locking portion 40 and the second locking portion 42 are formed on the second side edge portion 18 of the base body 16, for example figure 1 The inner side of the protruding side wall portion 44 as shown is formed in the inner segment of the side wall portion 44 to constitute the first locking port...

Embodiment 2

[0094] Figure 8 to Figure 11 The second embodiment of the present invention is illustrated. In the second embodiment, the front cam 134 and the rear cam 136 are formed in the opposite direction of the support shaft 22 from the first embodiment. In addition, the first locking portion 140 and the second locking portion 142 are constituted by the second side edge portion 18 of the base body 16 and the reinforcing rib 46 located inward of the support shaft 22 . The inner stage portion viewed from the side constitutes the first locking portion 140 , and the inner surface portion that can extend from the edge end of the inner stage portion of the reinforcing rib 46 constitutes the second locking portion 142 .

[0095] Similar to the first embodiment, when the movable ring 30 and the fixed ring 14 are engaged with each other, the front cam 134 is Figure 8 The shown position before closing is in contact with the first locking portion 140 . From this state, the movable ring 30 is ...

Embodiment 3

[0105] Below, refer to Figure 13 to Figure 22 A third embodiment of the present invention will be described.

[0106] Figure 13 The third embodiment of the binder according to the present invention is indicated by reference numeral 100. The binder 100, like the binders of the first and second embodiments, has a plate-like base 16 with two fixing rings 14 fixed along the first side edge 12 thereof, and a third plate along the base. The two side edge portions 18 are arranged in a pivot support groove 20 provided in the base, and a pivot 22 which can be bent and twisted freely.

[0107] The support shaft 22 of the binder 100 according to the third embodiment includes a rear cam 102 extending in the radial direction at an intermediate position in the longitudinal direction, and the rear cam 102 is positioned on each side of the rear cam 102 close to the major diameter portions 28, And the front cam 104 which differs from the rear cam 102 in the circumferential direction posit...

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PUM

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Abstract

The invention provides a binder integrally made of plastic, performing opening action divided into two stages in rotor ring and preventing the binder from being fallen off, as well as providing a narrow first opening state capable of inserting few binders and wider second opening state capable of inserting a plurality of binders.

Description

technical field [0001] The present invention relates to a binder. Background technique [0002] Conventionally, there are many binders in which a plurality of fixing rings are provided on one side of an elongated plastic base material, and a plurality of fixing rings are arranged on the other side and supported by a shaft member. As a plurality of movable rings that are rotatable and can be locked with a fixed ring and can be opened and closed, loose-leaf paper provided with insertion holes corresponding to the respective rings in advance is detachably stapled into such rings. [0003] Such conventional binders include the following binders, etc., as described in Japanese Patent No. 3749893 (Patent Document 1), which are appended to the present specification. Figure 24 as well as Figure 25 As indicated by the numeral 400 in the figure, the shaft member is incorporated into a metal coil spring 408 so that when the movable second half-ring element 402 having the hook-shaped...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B42F3/04B42F13/22
CPCB42F3/04B42F13/22
Inventor 金田浩士
Owner 金田克已
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