CN204123830U - A kind of binder clip - Google Patents

Abstract

The utility model relates to a kind of binder clip, comprises clamp, clip, clamping plate, caudal peduncle, it is characterized in that this binder clip clamp is provided with four torsion arcs, and these four torsion arcs are distributed on four cross bars.Described torsion arc is circular arc, and caves in inside clamp; Clamp is provided with clamp dop, and two clamping plate are arranged on clamp dop, and the heel post of clamp is stuck in the heel post buckle of clamping plate.Caudal peduncle is arranged in the crimping bayonet socket of clamping plate by caudal peduncle dop.This binder clip does not only block by the content of holding file, also on the cross bar of clamp, be provided with torsion arc, the basis not increasing cross bar axial length adds the length of wires of deformation, make unit length wire rod both ends of the surface relative torsional angle less, shearing stress on cross section is less, clamp stress distribution is comparatively even, improves fatigue strength and extends service life; Symmetrically arranged four torsion arcs add clamp spine and by the contact width of holding file, are easy to document alignment simultaneously.

Description

A kind of binder clip

Technical field

The utility model relates to a kind of binder clip, especially a kind of binder clip of structure of steel wire.

Background technology

Binder clip is a kind of common stationery, existing traditional binder clip usually by an one-time formed elastic steel sheet as binder clip clamp, its openend is outwards curled into tubulose, bends the caudal peduncle be coiled into for installing by spring steel.This quasi-tradition binder clip in actual use, easily blocks by the content of retain documents etc., need reopen binder clip when wanting to check and being blocked word, and easily causes document etc. to occur in sequence confusion.

In prior art, have design clamp structure being changed into spring steel wire by elastic steel sheet, clamp is penetrating greatly reduces blocking file, but the fatigue strength of this kind of clamp not enough life-span is shorter.Clamp needs frequent folding in actual use, continually elastic deformation occurs, and provide clamping force and restoring force primarily of the deformation that twists of the cross bar of clamp in clamp deformation process, this just requires that clamp has higher fatigue strength.And the cross bar of existing steel wire binder clip is straight-bar, and length is shorter, and unit length wire rod both ends of the surface relative torsional angle is comparatively large, and the shearing stress on cross section is comparatively large, and clamp stress distribution can be made bad, makes the fatigue strength of clamp deficiency and then causes service life shorter.

Utility model content

For the deficiencies in the prior art, the technical problem that the utility model solves provides a kind of binder clip.This binder clip does not only block by the content of holding file, also on the cross bar of clamp, be provided with torsion arc, the basis not increasing cross bar axial length adds the length of wires of deformation, make unit length wire rod both ends of the surface relative torsional angle less, shearing stress on cross section is less, thus make stress distribution in clamp deformation process comparatively even, improve fatigue strength and extend service life; Symmetrically arranged four torsion arcs add clamp spine and by the contact width of holding file, are easy to document alignment simultaneously.

The utility model solve the technical problem adopted technical scheme, designs a kind of binder clip, comprises clamp, clip, clamping plate, caudal peduncle, it is characterized in that this binder clip clamp is provided with four torsion arcs, and these four torsion arcs are distributed on four cross bars.Described torsion arc is circular arc, and caves in inside clamp; The ratio of its chord length and cross bar length is 0.38-0.56; The ratio of its action and support bar length is 0.33-0.48.

Clamp is provided with clamp dop, and two clamping plate are arranged on clamp dop, and the heel post of clamp is stuck in the heel post buckle of clamping plate.Caudal peduncle is arranged in the crimping bayonet socket of clamping plate by caudal peduncle dop.

The utility model binder clip can not only realize common binder clip function and also to lower by folder document shielding rate, also possess following advantage simultaneously:

1. the utility model binder clip is provided with torsion arc on the cross bar of clamp, the basis not increasing cross bar axial length adds the length of wires of deformation, make unit length wire rod both ends of the surface relative torsional angle less, shearing stress on cross section is less, thus make stress distribution in clamp deformation process comparatively even, improve fatigue strength and extend service life.

2. simultaneously, on clamp, symmetrically arranged four torsion arcs add clamp spine and by the contact width of holding file, are easy to document alignment.

3. compare with existing steel wire binder clip with conventional steel sheet binder clip, the utility model binder clip morphosis is more graceful.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model binder clip;

Fig. 2 is the structural representation of clamp and clip;

Fig. 3 is the partial enlargement structural representation of I in Fig. 1;

Fig. 4 is clamp region schematic diagram.

Number in the figure illustrates:

1. caudal peduncle, 11. spanners, 12. caudal peduncle necks, 13. caudal peduncle dops;

2. clip;

3. clamp, 31. support bars, 32 torsion arcs, 33. cross bars, 34. heel posts, 35. clamp dops;

4. clamping plate, 41. heel post buckles, 42. crimping bayonet sockets.

Detailed description of the invention

Below in conjunction with embodiment and accompanying drawing, describe the utility model in detail.Specific embodiment is only further detailed description to utility model and explanation, does not limit the protection domain that this uses novel claim with this.

The utility model binder clip (see Fig. 1-4) comprises caudal peduncle 1, clip 2, clamp 3, clamping plate 4.Described clamp 3 (see Fig. 2) is made up of symmetrical two parts, and every part is bent by a steel wire and forms; Clamp 3 is provided with support bar 31, torsion arc 32, cross bar 33, heel post 34, clamp dop 35; Clamp 3 is provided with four torsion arcs 32, and these four torsion arcs 32 are distributed on four cross bars 33, and cave inward, and the ratio of its chord length and cross bar 33 length is 0.38-0.56, and the ratio of its action and support bar 31 length is 0.33-0.48.

Clip 2, by coated affixed for two of clamp 3 support bars 31, makes symmetrical two parts clamp 3 be connected as a whole.

Clamping plate 4 (see Fig. 4) and clamp 3 are connected, and clamp dop 35 is coated in crimping bayonet socket 42, and the heel post 34 of clamp 3 is coated in the heel post buckle 41 of clamping plate 4.

Caudal peduncle 1 is arranged in the crimping bayonet socket 42 of clamping plate 4 by caudal peduncle dop 13, and coaxial with clamp dop 35, and caudal peduncle dop 13 end face and clamp dop 35 end face leave the gap (see Fig. 1, Fig. 3) of 1mm-3mm.The width of to be distance on caudal peduncle neck 12, caudal peduncle between two contact points be at the position that caudal peduncle 1 contacts with the cross bar 33 of clamp 3 caudal peduncle neck 12; The width of described caudal peduncle neck 12 is less than the minimum range of left and right two torsion arcs 32.

In using, pressing spanner 11, there is elastic deformation in clamp 3, two clamping plate 4 open; In clamp 3 elastic deformation process, cross bar 33 and torsion arc 32 twist deformation, and heel post 23 bends deformation; Simultaneously, torsion arc 32 be arranged so that clamp adds the length of wires of deformation on the basis not increasing cross bar 33 axial length, make unit length wire rod both ends of the surface relative torsional angle less, shearing stress on cross section is less, stress distribution is comparatively even, make fatigue strength higher, service life is longer.

The utility model is not addressed part and is applicable to prior art.

Claims (2)

1. a binder clip, comprises clamp, clip, clamping plate, caudal peduncle, it is characterized in that described clamp is provided with four torsion arcs, and these four torsion arcs are distributed on four cross bars.

2. binder clip according to claim 1, is characterized in that described torsion arc is circular arc, and caves in inside clamp; The ratio of its chord length and cross bar length is 0.38-0.56; The ratio of its action and support bar length is 0.33-0.48.