A non-blocking invisible head with a pull-tab fixing

Abstract

The application discloses a non-blocking invisible head for realizing pull-tab fixation, which comprises a puller main body, a pull-tab and a pull-tab mounting portion. The pull-tab mounting portion is arranged on the puller main body and is provided with a mounting hole. The pull-tab is provided with a shaft portion and clamping arms arranged at both ends of the shaft portion. The puller main body is provided with a supporting structure, which is arranged at least on one side in the width direction of the mounting hole. The shaft portion is rotatably arranged in the mounting hole. The clamping arms are provided with a connecting portion connected with the shaft portion and an abutting portion arranged on the outer periphery of the connecting portion. The minimum aperture of the mounting hole is larger than the maximum radial width of the shaft portion. The abutting portion is staggered with the supporting structure. The connecting portion is coaxially arranged with the shaft portion. When the pull-tab is turned over and leaves the forward or backward laid state, the abutting portion abuts against the supporting structure. The application has the advantage of being more convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the zipper technology, in particular to a no-block invisible head for fixing the puller. BACKGROUND

[0002] The existing invisible zipper is generally used with invisible puller. In order to achieve the invisible effect, the invisible puller is small in size and simple in structure, so it cannot set a complex puller state fixing structure. In use, the puller will sway. In order to solve the above problem, a puller appears on the market. The puller uses the friction of the puller mounting part to keep the puller in the state of lying down, upside down and any state between lying down and upside down. In short, the product always presses the puller shaft part through the puller mounting part, thereby increasing the resistance of the puller in the whole rotating process, so that the puller can stop at any position without external force. The above structure solves the problem of puller swaying, but in actual use, for example, when the puller lies down and closely adheres to the upper deck of the puller, the distance between the end of the puller and the zipper is small. Since the invisible puller and the puller are small in size, and the puller is subjected to large resistance when rotating, the puller cannot be smoothly lifted if the finger is not stable or slips, causing inconvenience in use. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a no-block invisible head for fixing the puller, which is convenient to use.

[0004] In order to achieve the above purpose, the solution of the present application is as follows:

[0005] A no-block invisible head for fixing the puller, comprising a puller main body, a puller and a puller mounting part, the puller mounting part is arranged on the puller main body, the puller mounting part has a mounting hole, the puller has a shaft part and clamping arms located at both ends of the shaft part;

[0006] The puller main body is provided with a support structure, the support structure is arranged at least on one side of the mounting hole in the width direction;

[0007] The shaft part is rotatably arranged in the mounting hole, the clamping arm has a connecting part connected with the shaft part and an abutting part arranged on the outer periphery of the connecting part;

[0008] The smallest aperture of the mounting hole is larger than the maximum radial width of the shaft part, the abutting part is staggered with the support structure, and the connecting part is coaxially arranged with the shaft part;

[0009] When the pull-tab is flipped and leaves the forward or backward lying state, the abutting portion abuts against the support structure, the abutting portion lifts the connecting portion, the axis of the connecting portion rises, the connecting portion drives the shaft portion to rise, the shaft portion is in frictional contact with the inner side of the mounting hole away from the puller body, and the pull-tab maintains the posture during the flipping process under the combined action of the friction between the abutting portion and the support structure and the friction between the shaft portion and the mounting hole.

[0010] Further, the pull-tab mounting portion comprises a pair of needle teeth and a bearing table between the pair of needle teeth, and the lowest position point of the shaft portion is located on or above the bearing table when the pull-tab is in the forward or backward lying state.

[0011] Further, the abutting portion has a support portion matching surface, the support portion matching surface is in rotational frictional cooperation with the support portion when the pull-tab is flipped from the forward lying state to the backward lying state, the radial distance between the support portion matching surface and the axis of the shaft portion is d1, and the distance between the outer circumferential surface of the shaft portion in the same radial direction and the axis is d2.

[0012] Further, the support structure is a support plane, and the distance between the support plane and the lowest position point in the height direction of the puller body is d3, d3≥0.

[0013] Further, at the abutting position of the support portion matching surface and the support structure, d1-d3>d2.

[0014] Further, the shaft portion is a cylindrical shaft.

[0015] Further, the support portion matching surface is a curved surface.

[0016] Further, the support portion matching surface comprises two straight surfaces tangent to the shaft portion and an arc surface connecting the two straight surfaces, the two straight surfaces are located on both sides of the thickness direction of the pull-tab, and the arc surface is located at the end of the pull-tab away from the pull-tab handle.

[0017] Further, the support structure is a protrusion, the distance between the protrusion and the lowest position point in the height direction is d4, and d4>0.

[0018] Further, at the abutting position of the support portion matching surface and the support structure, d1+d4>d2.

[0019] Further, the clamping arm is also provided with a give-way slot, and when the pull-tab is lying forward or backward on the puller body, the protrusion is located in the corresponding give-way slot.

[0020] With the above structure, the no-block invisible zipper head for realizing the fixing of the pull tab has the following technical effects: the minimum diameter of the mounting hole is larger than the maximum radial width of the shaft part, so when the pull tab is laid forward or backward on the pull head body, the shaft part only contacts with part of the inner side wall of the mounting hole, the generated friction does not excessively limit the rotation of the shaft part, so the pull tab can be easily lifted, when the pull tab starts to turn away from the state of being laid forward or backward on the pull head body, the abutting part abuts against the supporting structure, the abutting part lifts the connecting part, the axis of the connecting part rises, the connecting part drives the shaft part to rise, the shaft part is in frictional contact with the inner side of the mounting hole away from the pull head body, and the pull tab is kept in the posture during the turning process under the combined action of the friction between the abutting part and the supporting structure and the friction between the shaft part and the mounting hole. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a structure diagram of a pull tab, a pull head body and a needle tooth before riveting according to an embodiment of the present application;

[0022] Figure 2 FIG. 2 is a structure diagram of a pull tab installed on the pull tab mounting part and in a forward or backward laid state according to the embodiment of the present application;

[0023] Figure 3 FIG. 3 is a structure diagram of the pull tab installed on the pull tab mounting part and in a turning state away from the forward or backward laid state according to the embodiment of the present application;

[0024] Figure 4 FIG. 4 is a structure diagram of a pull tab, a pull head body and a needle tooth before riveting according to another embodiment of the present application;

[0025] Figure 5 FIG. 5 is a structure diagram of a pull tab installed on the pull tab mounting part and in a forward or backward laid state according to the embodiment of the present application;

[0026] Figure 6 FIG. 6 is a structure diagram of the pull tab installed on the pull tab mounting part and in a turning state away from the forward or backward laid state according to the embodiment of the present application;

[0027] Figure 7 FIG. 7 is a structure diagram of a pull tab, a pull head body and a needle tooth before riveting according to another embodiment of the present application;

[0028] Figure 8 FIG. 8 is a structure diagram of a pull tab installed on the pull tab mounting part and in a forward or backward laid state according to the embodiment of the present application;

[0029] Figure 9Fig. 3 is a schematic view of the structure of the pull-tab mounting portion of the pull-tab mounting portion of the third embodiment of the present application when the pull-tab is mounted on the pull-tab mounting portion and the pull-tab is in a flipped state away from the forward or rearward laid-flat state;

[0030] Figure 10 Fig. 4 is a schematic view of the structure of the pull-tab mounting portion of the pull-tab mounting portion of the third embodiment of the present application when the pull-tab is mounted on the pull-tab mounting portion and the pull-tab is in another flipped state away from the forward or rearward laid-flat state.

[0031] Fig. 1: 1. puller body, 2. pull-tab, 3. mounting hole, 4. needle tooth, 5. bearing platform, 6. handle, 7. shaft portion, 8. clamping arm, 9. abutment portion, 10. curved surface, 11. support plane, 12. straight surface, 13. arc surface, 14. protrusion, 15. clearance slot, d1. radial distance between the support portion mating surface and the axis of the shaft portion, d2. distance between the outer circumferential surface of the shaft portion and the axis, d4. distance between the protrusion in the height direction and the lowest point of the pull-tab. DETAILED DESCRIPTION

[0032] In order to further explain the technical solutions of the present application, the present application will be described in detail below through specific embodiments.

[0033] Embodiment 1:

[0034] As shown in Figs. 1-4, a pull-tab fixing type invisible head without blocking, which is one of the implementations of the present application, comprises a puller body 1, a pull-tab 2 and a mounting portion. Figure 1 Figure 2 The puller body 1 in the present embodiment is substantially the same as the puller body of the existing invisible head without blocking, and the puller body 1 can also be an automatic head or other puller body.

[0035] The mounting portion is provided on the puller body 1, and the mounting portion has a mounting hole 3 for mounting the pull-tab 2, and the pull-tab 2 is rotationally arranged on the mounting portion. In the present embodiment, the mounting portion comprises a pair of needle teeth 4 and a bearing platform 5 located between the pair of needle teeth, the pair of needle teeth 4 are riveted and bent and close to each other, and the pair of riveted needle teeth 4 and the bearing platform 5 enclose the mounting hole 3.

[0036] The pull-tab 2 comprises a handle 6, a shaft portion 7 and clamping arms 8, the number of the clamping arms 8 is two, one end of each of the two clamping arms 8 is located at the two ends of the shaft portion 7, and the other end of each of the two clamping arms 8 is connected with the handle 6, the shaft portion 7 can be a cylindrical shaft with a circular cross-section or a columnar shaft with an irregular cross-section, and in the present embodiment, the shaft portion 7 is a cylindrical shaft.

[0037] In order to achieve better effects, at least the shaft portion 7 and the clamping arms 8 are injection molded from resin material, and in the present embodiment, the entire pull-tab 2 is injection molded from resin material.

[0038] In order to achieve better effects, at least the shaft portion 7 and the clamping arms 8 are injection molded from resin material, and in the present embodiment, the entire pull-tab 2 is injection molded from resin material.

[0039] ​A supporting structure is provided on the slider body 1, and the supporting structure is arranged on at least one side in the width direction of the mounting hole 3. The width direction of the mounting hole 3 is consistent with the width direction of the slider body 1. The width direction of the slider body 1 is a direction orthogonal to the direction in which the slider body 1 is pulled when in use. The number of the supporting structures can be one or two. When there is one supporting structure, the supporting structure can be arranged on any side in the width direction of the mounting hole 3. When there are two supporting structures, the two supporting structures are respectively located on both sides of the width direction of the mounting hole 3.

[0040] The shaft portion 7 is rotatably arranged in the mounting hole 3, and the minimum aperture of the mounting hole 3 is larger than the maximum radial width of the shaft portion 7. The clamping arm 8 has a connecting portion connected to the shaft portion 7 and an abutting portion 9 arranged on the outer periphery of the connecting portion. The connecting portion and the abutting portion 9 are integrally formed, and the connecting portion is coaxially arranged with the shaft portion 7. In this embodiment, the connecting portion is an area on the clamping arm 8 that is directly connected to the shaft portion 7 and has the same cross-sectional shape and size as the shaft portion 7. The abutting portion 9 has a supporting portion mating surface, which is arranged on the radial outer peripheral edge of the abutting portion 9, and the supporting portion mating surface is a curved surface 10.

[0041] When the pull tab 2 is in a forward or backward folded state, the abutment portion 9 is staggered with the support structure; in addition, when the pull tab 2 is in a forward or backward folded state, the lowest position point of the radial outer peripheral edge of the shaft portion 7 is located at the supporting platform 5 or above the supporting platform 5, and the lowest position point is the position on the radial outer peripheral edge of the shaft portion 7 closest to the slider body 1, and there is a gap between the shaft portion 7 and the inner hole wall on the side of the mounting hole 3 away from the slider body.

[0042] When the pull tab 2 is flipped from the forward-folded state to the backward-folded state, the supporting portion mating surface (i.e., the curved surface 10) is rotationally frictionally engaged with the supporting portion. The radial distance between the supporting portion mating surface (i.e., the curved surface 10) and the axis of the shaft portion 7 is d1, and the distance between the outer peripheral surface of the shaft portion 7 and the axis in the same radial direction is d2.

[0043] Specifically, in this embodiment, the supporting structure is a supporting plane 11, and the distance between the supporting plane 11 and the lowest position point in the height direction of the slider body 1 is d3, d3 ≥ 0, that is, when the pull tab 2 is in a forward or backward falling state, the lowest position point of the shaft 7 is not lower than the supporting plane 11 in the height direction. Furthermore, when the pull tab 2 is flipped from the forward falling state to the backward falling state, at the point where the mating surface of the support portion abuts the protrusion 14, d1, d2 and d3 satisfy the following relationship: d1-d3>d2.

[0044] In this embodiment, the lowest point of the shaft portion 7 is located on the supporting platform 5 , and the supporting platform 5 and the supporting plane 11 are located at the same height, d3=0.

[0045] As another optional embodiment, the supporting platform 5 can also be set higher than the supporting plane 11, that is, the supporting plane 11 is a recessed portion arranged on both sides of the slider mounting portion. Since the value of d2 remains unchanged, d3>0 at this time. In order to satisfy the relationship d1-d3>d2, it is necessary to increase the value of d1, that is, increase the radial distance between the mating surface of the support portion and the axis of the shaft portion 7.

[0046] like Figure 2 and Figure 3 As shown, when the pull tab 2 flips over and leaves the forward or backward lying state, the abutment portion 9 abuts against the supporting structure, the curved surface 10 is in frictional contact with the supporting plane 11, the abutment portion 9 lifts the connecting portion, the axis of the connecting portion rises, the connecting portion drives the shaft portion 7 to rise, and the shaft portion 7 is in frictional contact with the inner side surface of the mounting hole 3 away from the slider body 1. The pull tab 2 maintains its posture during the flipping process under the combined action of the friction force between the abutment portion 9 and the supporting structure and the friction force between the shaft portion 7 and the mounting hole 3.

[0047] Implementation method 2:

[0048] like Figure 4 As shown, the pull-tab structure of this embodiment is roughly the same as that of embodiment 1, except that: the supporting portion mating surface includes two straight surfaces 12 tangent to the shaft portion 7, and an arcuate surface 13 connecting the two straight surfaces 12, the two straight surfaces 12 are located on both sides of the pull-tab 2 in the thickness direction, and the arcuate surface 13 is located at the end of the pull-tab 2 away from the handle 6.

[0049] Preferably, the two straight surfaces 12 are respectively arranged coplanar with the extension surfaces of the two planes on both sides of the handle 6 in the thickness direction.

[0050] Compared with the first embodiment, the pull tab 2 of this embodiment can be kept at a position with a smaller angle with the upper surface of the slider body 1 when rotating. The specific principle is as follows: Figure 5 and Figure 6 As shown, when the pull tab 2 is flipped over and leaves the forward or backward lying state, the straight surface 12 will contact the supporting plane 11 earlier than the curved surface provided in the second embodiment to generate friction, thereby causing the pull tab 2 to stay at a position with a smaller angle with the upper surface of the slider body 1.

[0051] Implementation method three:

[0052] like Figure 7 、 Figure 8 、 Figure 9 and Figure 10As shown, the difference between this embodiment and embodiment 1 is that: the supporting structure is a protrusion 14 protruding from the upper surface of the slider body 1, and a clearance groove 15 is also provided on the clamping arm 8. The clearance groove 15 is located on the outside of the connecting part. When the pull tab 2 is placed forward or backward on the slider body 1, the protrusion 14 is located in the corresponding clearance groove 15.

[0053] In this embodiment, the connecting portion is a region on the clamp arm 8 that is directly connected to the shaft portion 7 and has the same cross-sectional shape as the shaft portion 7 but a smaller cross-sectional size than the corresponding region of the shaft portion 7.

[0054] Similar to the first embodiment, the contact portion 9 also has a curved surface 10 provided on the radially outer circumference of the contact portion 9 .

[0055] The supporting portion mating surface of this embodiment is composed of the curved surface 10 and the inner groove wall of the clearance groove 15 .

[0056] The radial distance between the mating surface of the support portion and the axis of the shaft portion 7 is d1, the distance between the outer peripheral surface of the shaft portion 7 and the axis in the same radial direction is d2, and the distance between the protrusion 14 and the lowest position point in the height direction is d4, d4>0. Since this embodiment is the same as the first embodiment in that the lowest point of the shaft portion 7 is also located on the supporting platform 5, the supporting platform 5 and the supporting plane 11 are at the same height.

[0057] Furthermore, when the pull tab 2 is turned over from the forward-falling state to the backward-falling state, at the point where the supporting portion mating surface abuts the protrusion 14 , d1 , d2 and d4 satisfy the following relationship: d1 + d4 > d2 .

[0058] In order to achieve a better matching effect, the cross-sectional shape of the protrusion 14 along the length direction of the slider body 1 is similar to the cross-sectional shape of the clearance groove 15 along the length direction of the pull tab 2 .

[0059] When the pull tab 2 flips over and leaves the forward or backward tilted position, the inner sidewall of the clearance groove 15 first contacts the protrusion 14, generating friction. The connection portion rises under the action of the protrusion 14, raising the axis of the connection portion. This in turn drives the shaft portion 7 upward, causing the shaft portion 7 to frictionally contact the inner side surface of the slider body 1 away from the mounting hole 3. The friction between the inner sidewall of the clearance groove 15 and the protrusion 14, and the friction between the shaft portion 7 and the mounting hole 3, helps the pull tab 2 maintain its posture during the flipping process. When the clearance groove 15 and the protrusion 14 are offset, friction is generated between the curved surface 10 and the protrusion 14. The friction between the curved surface 10 and the protrusion 14, and the friction between the shaft portion 7 and the mounting hole 3, helps the pull tab 2 maintain its posture during the flipping process.

[0060] The above embodiments and drawings are not intended to limit the product form and style of the present application, and any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the scope of the patent of the present application.

Claims

1. A non-blocking invisible head for fixing a pull tab, characterized by: The pull tab comprises a slider body, a pull tab and a pull tab mounting portion, wherein the pull tab mounting portion is provided on the slider body, the pull tab mounting portion has a mounting hole, and the pull tab has a shaft portion and clamping arms located at both ends of the shaft portion; The slider body is provided with a support structure, and the support structure is provided at least on one side in the width direction of the mounting hole; The shaft portion is rotatably disposed in the mounting hole, and the clamp arm comprises a connecting portion connected to the shaft portion and an abutting portion disposed on the outer periphery of the connecting portion; The minimum diameter of the mounting hole is greater than the maximum radial width of the shaft portion, the abutment portion is staggered from the support structure, and the connecting portion is coaxially arranged with the shaft portion; When the pull tab flips over and leaves the forward or backward lying state, the abutment portion abuts against the supporting structure, the abutment portion lifts the connecting portion, the axis of the connecting portion rises, the connecting portion drives the shaft portion to rise, and the shaft portion and the mounting hole are in frictional contact with the inner side surface of the slider body. The pull tab maintains its posture during the flipping process under the combined action of the friction force between the abutment portion and the supporting structure and the friction force between the shaft portion and the mounting hole.

2. The invisible head for fixing a pull tab according to claim 1, characterized in that: The pull tab mounting portion includes a pair of pin teeth and a supporting platform located between the pair of pin teeth. When the pull tab is in a forward or backward lying state, the lowest position point of the shaft portion is located at the supporting platform or above the supporting platform.

3. The invisible head for fixing a pull tab according to claim 2, characterized in that: The abutment portion has a support portion mating surface. When the pull tab is flipped from a forward-folded state to a backward-folded state, the support portion mating surface and the support portion are rotationally frictionally engaged. The radial distance between the support portion mating surface and the axis of the shaft portion is d1, and the distance between the outer peripheral surface of the shaft portion and the axis in the same radial direction is d2.

4. The invisible head for fixing a pull tab according to claim 3, characterized in that: The supporting structure is a supporting plane, and the distance between the supporting plane and the lowest point in the height direction of the slider body is d3, and d3 ≥ 0.

5. The invisible head for fixing a pull tab according to claim 4, characterized in that: At the abutment point between the supporting portion mating surface and the supporting structure, d1 - d3 > d2.

6. The invisible head for fixing a pull tab according to claim 5, characterized in that: The shaft portion is a cylindrical shaft.

7. The invisible head for fixing a pull tab according to claim 6, characterized in that: The supporting portion mating surface is a curved surface.

8. The invisible head for fixing a pull tab according to claim 7, characterized in that: The supporting portion mating surface includes two straight surfaces tangent to the shaft portion and an arcuate surface connecting the two straight surfaces. The two straight surfaces are located on both sides of the pull tab in the thickness direction, and the arcuate surface is located at the end of the pull tab away from the pull tab handle.

9. The invisible head for fixing a pull tab according to claim 3, characterized in that: The supporting structure is a convex block, and the distance between the convex block and the lowest position point in the height direction is d4, and d4>0.

10. The invisible head for fixing a pull tab according to claim 9, characterized in that: At the abutment point between the supporting portion mating surface and the supporting structure, d1 + d4 > d2.

11. The invisible head for fixing a pull tab according to claim 10, characterized in that: The clamping arm is further provided with a clearance groove, and when the pull tab is laid forward or backward on the slider body, the protrusion is located in the corresponding clearance groove.

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