Detachable cylindrical injection molding pull tab and corresponding pull head

Abstract

The utility model provides a detachable cylindrical injection molding pull piece and a pull head. The detachable cylindrical injection molding pull piece comprises a main body piece, a connecting piece and a lengthening piece. The main body piece is provided with a connecting part and an inserting part which are opposite; the inserting part is provided with a cylindrical containing groove, and the containing groove is provided with a loading opening back to the connecting part. An axial groove, a circumferential groove and a limiting groove which are sequentially connected are formed in the groove wall of the containing groove. The limiting groove is located in the side, deviating from the connecting part, of the circumferential groove. The connecting piece comprises a connecting block and a limiting piece. The connecting block is cylindrical and detachably arranged in the containing groove, and the connecting block and the containing groove are coaxially arranged. The limiting piece is connected to the peripheral side of the connecting block. The limiting piece sequentially passes through the axial groove and the circumferential groove and then is limited in the limiting groove. And the lengthening piece is connected to the connecting block. The pull head comprises a base and the detachable cylindrical injection molding pull piece. According to the detachable cylindrical injection molding pull piece and the corresponding pull head, when the lengthening piece is pulled, the main body piece and the connecting piece are not prone to being separated.

Description

Technical Field

[0001] The utility model relates to the technical field of zippers, in particular to a detachable cylindrical injection-molded pull tab and a corresponding pull head. Background Art

[0002] A zipper pull consists of a base and a pull tab. The pull tab drives the base to move, allowing the two zipper strips to open and close. One type of pull tab consists of a main body, a connector, and an extension. The extension is connected to the connector and serves to lengthen the pull tab, making it easier for the user to pull the pull tab. The main body and connector are detachably connected, allowing the connector to be separated from the main body and replaced if damaged, thus reducing costs. However, with existing pull tabs, using a strong force to pull the extension can easily cause the main body and connector to separate, rendering the pull tab inoperable.

[0003] Therefore, it is necessary to provide a detachable cylindrical injection-molded pull tab and a corresponding pull head to solve the above technical problems. Utility Model Content

[0004] The utility model provides a detachable cylindrical injection-molded pull tab and a corresponding pull head, which prevents a main body part and a connecting part from being easily separated when an extension part is pulled.

[0005] The technical solution of the utility model is:

[0006] A detachable cylindrical injection-molded pull tab for connection to a base, comprising:

[0007] A main body, comprising a connecting portion and a plug-in portion facing each other; the connecting portion is used to be connected to the base; the plug-in portion is provided with a cylindrical receiving groove, the receiving groove having an insertion opening facing away from the connecting portion; the groove wall of the receiving groove is provided with an axial groove, a circumferential groove and a limiting groove connected in sequence, the axial groove, the circumferential groove and the limiting groove all passing through the side wall of the receiving groove; the axial groove extends along the axial direction of the receiving groove and passes through the end face of the plug-in portion; the circumferential groove extends along the circumference of the receiving groove; the limiting groove is located on the side of the circumferential groove facing away from the connecting portion;

[0008] A connecting member, comprising a connecting block and a limiting member; the connecting block is cylindrical and detachably disposed in the receiving groove, the connecting block and the receiving groove being coaxially disposed; the limiting member is connected to the circumferential side of the connecting block; the limiting member is limited in the limiting groove after passing through the axial groove and the circumferential groove in sequence; and,

[0009] An extension piece is connected to the connecting block.

[0010] In the detachable cylindrical injection-molded pull tab described in the present invention, the limiting piece is cylindrical, and its axial direction is the same as the radial direction of the connecting block. The opposite side walls of the limiting groove are provided with limiting protrusions, and the two limiting protrusions are arranged opposite to each other in the circumferential direction of the accommodating groove, and are used to limit the limiting piece in the limiting groove.

[0011] In the detachable cylindrical injection-molded pull tab of the present invention, a push block is provided at one end of the limiting member facing away from the connecting block. The push block protrudes from the outer peripheral surface of the limiting member and is located outside the plug-in portion.

[0012] In the detachable cylindrical injection-molded pull tab described in the present invention, a protruding limiting column is further provided on the circumferential surface of the plug-in portion; the limiting member is in the shape of a U-shaped rope, and its U-shaped opening is embedded in the connecting block and is located on the circumferential side of the connecting block, and the limiting member is sleeved on the limiting column.

[0013] In the detachable cylindrical injection-molded pull tab of the present invention, the extension member is a drawstring, and the extension member and the limiting member are an integrated structure.

[0014] In the detachable cylindrical injection-molded pull tab of the present invention, a positioning groove cooperating with the limiting member is provided on the circumferential side of the limiting column, and the limiting member is located in the positioning groove.

[0015] In the detachable cylindrical injection-molded pull tab of the present invention, the limiting member is interference-enhanced in the limiting groove.

[0016] In the detachable cylindrical injection-molded pull tab of the present invention, when the limiting member is located in the circumferential groove, one end of the connecting block away from the connecting portion protrudes from the main body.

[0017] In the detachable cylindrical injection-molded pull tab of the present invention, the extension piece is connected to the end surface of the connecting block facing away from the connecting portion, and extends in a direction away from the connecting portion.

[0018] Another technical solution of the utility model is:

[0019] A slider, comprising:

[0020] base; and,

[0021] The above-mentioned detachable cylindrical injection-molded pull tab, the connecting portion is connected to the base.

[0022] Compared with the prior art, the present invention has the following beneficial effects: the user can move the base of the detachable cylindrical injection-molded pull tab and pull head of the present invention by pulling the extension piece. When assembling the main body and the connecting piece, first align the limiter with the axial groove, then insert the connecting block into the receiving groove and allow the limiter to slide along the axial groove. When the limiter moves to the connection between the axial groove and the circumferential groove, rotate the connecting block and allow the limiter to slide along the circumferential groove. When the limiter moves to the connection between the circumferential groove and the limiter groove, pull the connecting block in a direction away from the connection portion so that the limiter is limited in the limiter groove, and then the main body and the connecting piece can be assembled together. When disassembling the main body and the connecting piece, push the limiter toward the connection portion so that it enters the circumferential groove, rotate the connecting block in the opposite direction and allow the limiter to slide along the circumferential groove. When the limiter moves to the connection between the axial groove and the circumferential groove, pull the connecting block in a direction away from the connection portion, and then the main body and the connecting piece can be separated. The retaining groove is located on the side of the circumferential groove away from the connecting portion. When the extension piece is pulled during use, the retaining piece will not be dislodged from the retaining groove. The detachable cylindrical injection-molded pull tab and slider of the utility model can still be located in the retaining groove when the extension piece is pulled hard, thus making it difficult for the main body and the connecting piece to separate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0024] Figure 1 This is a structural schematic diagram of a slider provided in the first preferred embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the exploded structure of the slider provided in the first preferred embodiment of the present invention.

[0026] Figure 3 This is a structural diagram of the main body of the slider provided in the first preferred embodiment of the present invention.

[0027] Figure 4 This is a schematic structural diagram of a connector for a slider provided in a first preferred embodiment of the present invention.

[0028] Figure 5 This is a schematic structural diagram of a detachable cylindrical injection-molded pull tab provided in the second preferred embodiment of the present invention.

[0029] Figure 6 This is a structural schematic diagram of the main body of a detachable cylindrical injection-molded pull tab provided in the second preferred embodiment of the present invention.

[0030] Figure 7A schematic structural diagram of a connector for a detachable cylindrical injection-molded pull tab provided in a second preferred embodiment of the present invention.

[0031] in,

[0032] 1. Base,

[0033] 2. Removable cylindrical injection-molded pull tab,

[0034] 21. Main body,

[0035] 211, connecting part,

[0036] 212, plug-in portion, 2121, receiving groove, 2122, axial groove, 2123, circumferential groove, 2124, limiting groove, 2125, limiting protrusion, 2126, limiting column, 21261, positioning groove,

[0037] 22, connecting piece, 221, connecting block, 222, limiting piece, 2221, pushing block,

[0038] 23. Extension piece.

[0039] In the figures, structurally similar elements are denoted by the same reference numerals. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0041] Directional terms mentioned in this invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used with reference to the directions of the drawings. The directional terms used are used to illustrate and understand the invention, and are not intended to limit the invention.

[0042] The terms "first" and "second" in the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, nor as limiting the order of precedence.

[0043] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0044] A zipper pull consists of a base and a pull tab. The pull tab drives the base to move, allowing the two zipper strips to open and close. One type of pull tab consists of a main body, a connector, and an extension. The extension is connected to the connector and serves to lengthen the pull tab, making it easier for the user to pull the pull tab. The main body and connector are detachably connected, allowing the connector to be separated from the main body and replaced if damaged, thus reducing costs. However, with existing pull tabs, using a strong force to pull the extension can easily cause the main body and connector to separate, rendering the pull tab inoperable.

[0045] The following is a preferred embodiment of a slider provided by the present invention that can solve the above technical problems.

[0046] Please refer to Figure 1 and Figure 2 The preferred embodiment of the present invention provides a slider, which includes a base 1 and a detachable cylindrical injection-molded pull tab 2.

[0047] Please refer to Figure 2 、 Figure 3 and Figure 4The detachable cylindrical injection-molded pull tab 2 includes a main body 21, a connecting member 22, and an extension member 23. The main body 21 has a connecting portion 211 and an inserting portion 212 facing each other. The connecting portion 211 is connected to the base 1. The inserting portion 212 is provided with a cylindrical receiving groove 2121, and the receiving groove 2121 has an insertion opening facing away from the connecting portion 211. The groove wall of the receiving groove 2121 is provided with an axial groove 2122, a circumferential groove 2123, and a limiting groove 2124 connected in sequence. The axial groove 2122, the circumferential groove 2123, and the limiting groove 2124 all pass through the side wall of the receiving groove 2121. The axial groove 2122 extends along the axial direction of the receiving groove 2121 and passes through the end surface of the inserting portion 212. The circumferential groove 2123 extends along the circumference of the receiving groove 2121. The limiting groove 2124 is located on the side of the circumferential groove 2123 facing away from the connecting portion 211. The connector 22 includes a connecting block 221 and a retaining member 222. The connecting block 221 is cylindrical and removably mounted in the receiving groove 2121. The connecting block 221 and the receiving groove 2121 are coaxially arranged. The retaining member 222 is connected to the circumference of the connecting block 221. The retaining member 222 passes through the axial groove 2122 and the circumferential groove 2123 before being retained in the retaining groove 2124. The extension member 23 is connected to the connecting block 221.

[0048] The user can pull the extension piece 23 of the detachable cylindrical injection-molded pull tab 2 and the pull head of the present invention to move the base 1 and realize the opening and closing of the zipper.

[0049] When assembling the main part 21 and the connecting part 22, first align the limiting part 222 with the axial groove 2122, then insert the connecting block 221 into the accommodating groove 2121, and make the limiting part 222 slide along the axial groove 2122. When the limiting part 222 moves to the connection between the axial groove 2122 and the circumferential groove 2123, rotate the connecting block 221 and make the limiting part 222 slide along the circumferential groove 2123. When the limiting part 222 moves to the connection between the circumferential groove 2123 and the limiting groove 2124, pull the connecting block 221 in the direction away from the connecting part 211, so that the limiting part 222 is limited in the limiting groove 2124, and then the main part 21 and the connecting part 22 can be assembled together.

[0050] When separating the main member 21 and the connecting member 22, the limiting member 222 is pushed toward the connecting portion 211 so that it enters the circumferential groove 2123. The connecting block 221 is then rotated in the opposite direction to allow the limiting member 222 to slide along the circumferential groove 2123. When the limiting member 222 moves to the junction of the axial groove 2122 and the circumferential groove 2123, the connecting block 221 is pulled away from the connecting portion 211 to separate the main member 21 and the connecting member 22. The limiting groove 2124 is located on the side of the circumferential groove 2123 facing away from the connecting portion 211. When the extension member 23 is pulled during use, the limiting member 222 will not be disengaged from the limiting groove 2124. In the detachable cylindrical injection-molded pull tab 2 and the pull head of the present invention, when the extension member 23 is pulled forcefully, the limiting member 222 can still be located in the limiting groove 2124, thereby preventing the main member 21 and the connecting member 22 from being easily separated.

[0051] Please refer to Figure 3 and Figure 4 The limiting member 222 is cylindrical, with its axial direction aligned with the radial direction of the connecting block 221. Limiting protrusions 2125 are provided on opposite sides of the limiting groove 2124. The two limiting protrusions 2125 are arranged opposite each other in the circumferential direction of the receiving groove 2121 to retain the limiting member 222 within the limiting groove 2124. With this structure, the limiting member 222 is unlikely to escape from the limiting groove 2124 in the absence of external force, thereby preventing the main member 21 and the connecting member 22 from separating. The limiting protrusions 2125 are preferably strip-shaped radially of the connecting block 221 to reliably retain the limiting member 222 within the limiting groove 2124.

[0052] Please refer to Figure 4 A push block 2221 is provided on the end of the limiting member 222 facing away from the connecting block 221. The push block 2221 protrudes from the outer peripheral surface of the limiting member 222 and is located outside the plug-in portion 212. With this structure, when separating the main member 21 and the connecting member 22, the push block 2221 is pushed toward the connecting portion 211 to disengage the limiting member 222 from the limiting groove 2124, facilitating operation.

[0053] In other embodiments, the limiting protrusion 2125 may not be provided, and the limiting member 222 is set in the limiting groove 2124 with interference fit. In the absence of external force, the limiting member 222 is also not easy to separate from the limiting groove 2124.

[0054] Please refer to Figure 1 When the limiting member 222 is located in the circumferential groove 2123, the end of the connecting block 221 away from the connecting portion 211 protrudes from the main body 21. The user can pinch the protruding part of the connecting block 221 to rotate the connecting block 221, making the operation convenient.

[0055] Please continue to refer to Figure 1The extension piece 23 is connected to the end surface of the connecting block 221 facing away from the connecting portion 211 and extends in a direction away from the connecting portion 211. With the above structure, the extension piece 23 will not interfere with the rotation of the connecting block 221.

[0056] The method of using the slider of the first preferred embodiment of the utility model is as follows:

[0057] During normal use, the user can pull the extension member 23 to move the base 1 .

[0058] When assembling the main part 21 and the connecting part 22, first align the limiting part 222 with the axial groove 2122, then insert the connecting block 221 into the accommodating groove 2121, and make the limiting part 222 slide along the axial groove 2122. When the limiting part 222 moves to the connection between the axial groove 2122 and the circumferential groove 2123, pinch the protruding part of the connecting block 221 and rotate the connecting block 221, and make the limiting part 222 slide along the circumferential groove 2123. When the limiting part 222 moves to the connection between the circumferential groove 2123 and the limiting groove 2124, pull the connecting block 221 away from the connecting part 211, so that the limiting part 222 is located in the limiting groove 2124 and is clamped between the two limiting protrusions 2125. Then the main part 21 and the connecting part 22 can be assembled together.

[0059] When separating the main part 21 and the connecting part 22, push the push block 2221 in the direction close to the connecting part 211, so that the limiting part 222 disengages from the two limiting protrusions 2125 and enters the circumferential groove 2123, rotate the connecting block 221 in the opposite direction, and make the limiting part 222 slide along the circumferential groove 2123. When the limiting part 222 moves to the connection between the axial groove 2122 and the circumferential groove 2123, pull the connecting block 221 in the direction away from the connecting part 211, and the main part 21 and the connecting part 22 can be separated.

[0060] This completes the method for using the slider of the preferred embodiment.

[0061] Please refer to Figure 5 、 Figure 6 and Figure 7 The second preferred embodiment of the present invention provides a detachable cylindrical injection-molded pull tab. This differs from the first embodiment in that the circumference of the plug-in portion 212 is further provided with a protruding retaining post 2126. The retaining member 222 is in the form of a U-shaped rope, with its U-shaped opening embedded in the connecting block 221 and located on the circumference of the connecting block 221. The retaining member 222 is sleeved around the retaining post 2126, making it difficult to separate the main member 21 and the connecting member 22. The retaining member 222 is preferably an elastic cord, which facilitates the sleeve of the retaining member 22 around the retaining post 2126 and further improves the reliability of the connection between the two.

[0062] Please refer to Figure 5The extension piece 23 is a pull rope, and the extension piece 23 and the limiting piece 222 are an integral structure. The second connecting block 221 is injection-molded on a rope, which makes the processing simple.

[0063] Please refer to Figure 6 A positioning groove 21261 that cooperates with the limiting member 222 is provided on the circumferential side of the limiting column 2126, and the limiting member 222 is located in the positioning groove 21261, so that the limiting column 2126 and the limiting member 222 are not easily separated.

[0064] The other structural parts of the detachable cylindrical injection-molded pull tab may be the same as those in the first embodiment and will not be described in detail here. The same structural parts may also be applied to the slider in the first embodiment.

[0065] The utility model provides a detachable cylindrical injection-molded pull tab and a pull head. The user can pull the extension piece to drive the base to move, thereby realizing the opening and closing of the zipper.

[0066] When assembling the main part and the connecting part, first align the limit part with the axial groove, then insert the connecting block into the accommodating groove, and make the limit part slide along the axial groove. When the limit part moves to the connection between the axial groove and the circumferential groove, rotate the connecting block and make the limit part slide along the circumferential groove. When the limit part moves to the connection between the circumferential groove and the limit groove, pull the connecting block in the direction away from the connecting part, so that the limit part is limited in the limit groove, and then the main part and the connecting part can be assembled together.

[0067] When separating the main part and the connecting part, push the limiting part in the direction close to the connecting part so that it enters the circumferential groove, rotate the connecting block in the opposite direction, and make the limiting part slide along the circumferential groove. When the limiting part moves to the connection between the axial groove and the circumferential groove, pull the connecting block in the direction away from the connecting part to separate the main part and the connecting part. The limiting groove is located on the side of the circumferential groove away from the connecting part. When the extension part is pulled during use, the limiting part will not be separated from the limiting groove. With the detachable cylindrical injection-molded pull tab and pull head of the utility model, when the extension part is pulled hard, the limiting part can still be located in the limiting groove, so that the main part and the connecting part are not easy to separate.

[0068] To sum up, although the present invention has been disclosed as above in terms of preferred embodiments, the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent substitutions or changes based on the concept of the technical solution of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A detachable cylindrical injection-molded pull tab for connection to a base, characterized in that: include: A main body, comprising a connecting portion and a plug-in portion facing each other; the connecting portion is used to be connected to the base; the plug-in portion is provided with a cylindrical receiving groove, the receiving groove having an insertion opening facing away from the connecting portion; the groove wall of the receiving groove is provided with an axial groove, a circumferential groove and a limiting groove connected in sequence, the axial groove, the circumferential groove and the limiting groove all passing through the side wall of the receiving groove; the axial groove extends along the axial direction of the receiving groove and passes through the end face of the plug-in portion; the circumferential groove extends along the circumference of the receiving groove; the limiting groove is located on the side of the circumferential groove facing away from the connecting portion; A connecting member, comprising a connecting block and a limiting member; the connecting block is cylindrical and detachably disposed in the receiving groove, the connecting block and the receiving groove being coaxially disposed; the limiting member is connected to the circumferential side of the connecting block; the limiting member is limited in the limiting groove after passing through the axial groove and the circumferential groove in sequence; and, An extension piece is connected to the connecting block.

2. The detachable cylindrical injection-molded pull tab according to claim 1, characterized in that: The limiting member is columnar, and its axial direction is the same as the radial direction of the connecting block. The two opposite side walls of the limiting groove are provided with limiting protrusions. The two limiting protrusions are arranged opposite to each other in the circumferential direction of the accommodating groove, and are used to limit the limiting member in the limiting groove.

3. The detachable cylindrical injection-molded pull tab according to claim 2, characterized in that: A push block is provided at one end of the limiting member facing away from the connecting block. The push block protrudes from the outer peripheral surface of the limiting member and is located outside the plug-in portion.

4. The detachable cylindrical injection-molded pull tab according to claim 1, characterized in that: The peripheral surface of the plug-in portion is further provided with a protruding limiting column; the limiting member is in the shape of a U-shaped rope, the U-shaped opening of which is embedded in the connecting block and located on the peripheral side of the connecting block, and the limiting member is sleeved on the limiting column.

5. The detachable cylindrical injection-molded pull tab according to claim 4, characterized in that: The extension piece is a drawstring, and the extension piece and the limiting piece are an integrated structure.

6. The detachable cylindrical injection-molded pull tab according to claim 4, characterized in that: A positioning groove matched with the limiting member is provided on the circumferential side of the limiting column, and the limiting member is located in the positioning groove.

7. The detachable cylindrical injection-molded pull tab according to any one of claims 1 to 6, characterized in that: The limiting member is interference-fitted in the limiting groove.

8. The detachable cylindrical injection-molded pull tab according to any one of claims 1 to 6, characterized in that: When the limiting member is located in the circumferential groove, one end of the connecting block away from the connecting portion protrudes from the main body.

9. The detachable cylindrical injection-molded pull tab according to any one of claims 1 to 6, characterized in that: The extension piece is connected to the end surface of the connection block facing away from the connection portion and extends in a direction away from the connection portion.

10. A slider, characterized in that: include: base; and, The detachable cylindrical injection-molded pull tab according to any one of claims 1 to 9, wherein the connecting portion is connected to the base.

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