Novel thread feeding needle

Abstract

The utility model discloses a novel thread feeding needle which comprises a flat needle body, a cylindrical mounting part is formed at the bottom end of the needle body, a U-shaped groove is formed in the top end of the needle body, paired grooves which are arranged in a mirror image mode are formed in the top of the needle body, the forming direction of each groove is the same as the forming direction of the U-shaped groove, and the paired grooves are located below the U-shaped groove. Two notches which are formed in the left side and the right side of the needle body in a mirror symmetry mode are formed in the top of the needle body. The pair of grooves are formed in the top of the needle body, the top of the needle body penetrates through a binding hole in the returning process of the thread feeding needle, enough space is reserved on the front side, the rear side, the left side and the right side of the needle body for placing a binding thread due to the grooves, and therefore the thread feeding needle cannot bring the binding thread back in the process that the top of the thread feeding needle penetrates through the binding hole. Therefore, the problem that the binding line is easily brought back when the line feeding needle is reset is solved, the whole structure is simple and compact, machining is convenient and fast, and the workflow degree of the binding machine can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of binding machines, in particular to a new thread feeding needle with a long service life. Background Art

[0002] A thread binding machine is a binding machine that uses thread as material to bind multiple sheets of paper. When the thread binding machine is working, the punching mechanism located above the machine punches holes in multiple pages or documents, and then the thread feeding needle located below the machine feeds the thread in the thread groove from the bottom of the hole to the top outside of the hole, tying the thread together to complete the binding.

[0003] In the existing threading binding machines, the mechanism for feeding the thread is generally provided with a thread feeding needle. Referring to the patent document with application number CN2019215720713, it discloses a thread feeding needle of a thread-bound automatic file binding machine, wherein the left side and / or right side of the middle and upper part of the needle body of the thread feeding needle are provided with a thread avoiding portion, and the thread avoiding portion includes an upper thread avoiding portion and a lower thread avoiding portion, and the left and right sides of the thread feeding needle are provided with an upper thread avoiding portion and a lower thread avoiding portion. The upper thread avoiding portion is inclined relative to the vertical direction, and the lower thread avoiding portion is vertically arranged or inclined relative to the vertical direction. The combination design of the upper thread avoiding portion and the lower thread avoiding portion is to improve the structural strength of the thread feeding needle while providing a space for accommodating the binding thread. Among them, the lower wire avoiding part makes there be a lower wire guiding space slightly smaller than the upper wire guiding space between the middle part of the wire feeding needle and the binding circular hole. This ensures that the binding wire is smoothly pulled upward while making each binding circular hole of the document exert an appropriate friction force on the corresponding binding wire respectively, so that the wire feeding needle can tighten the binding wire between the binding circular holes in the later stage of pulling the binding wire upward, avoiding the phenomenon of loosening of the binding wire between the binding circular holes.

[0004] In actual work, the wire feeding needle is inserted from the lower end of the binding hole to feed the wire. After it is in place, the upper wire avoiding part of the wire feeding needle is exposed from the upper end of the binding hole. When returning to its original position, the wire feeding needle is pulled out from the lower end of the binding hole, during which the upper wire avoiding part of the wire feeding needle will pass through the binding hole again. Since the upper wire avoiding part is only arranged on the left and right sides of the wire feeding needle, there is little gap between the front and back sides of the wire feeding needle and the binding hole. When the needle is closed, since the binding thread is in a relaxed state, when the upper wire avoiding part exposed from the binding hole retracts, the front and back sides of the upper wire avoiding part may clamp and drag the binding thread to retract, resulting in the phenomenon of unsmooth needle closing, and there is a problem that the wire feeding needle is easy to bring back the binding thread when it is reset. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a new type of thread feeding needle, which solves the problem that the previous thread feeding needle is easy to bring back the binding thread when resetting by improving the structure of the thread feeding needle itself.

[0006] In order to solve the above technical problems, the present invention discloses a new type of wire feeding needle, including a flat needle body, a cylindrical mounting portion formed at the bottom end of the needle body, a U-shaped groove formed at the top end of the needle body, and a paired and mirror-imaged grooves formed at the top of the needle body, wherein the opening direction of each groove is the same as the opening direction of the U-shaped groove, and the paired grooves are located below the U-shaped groove so that two notches are formed on the top of the needle body which are mirror-imaged and symmetrically arranged on the left and right sides of the needle body.

[0007] Wherein, the cross-sectional shape of each groove is a trapezoid.

[0008] Wherein, the cross-sectional shape of each groove is U-shaped.

[0009] The ratio of the groove width to the needle body length is 1:3-5.

[0010] The groove depth is 0.5 mm to 2 mm.

[0011] Compared with the prior art, the embodiment of the present invention has the following beneficial effects: by arranging a pair of grooves on the top of the needle body, during the process of the thread feeding needle returning to its position, the top of the needle body passes through the binding hole. Due to the presence of the grooves, sufficient space is left on the front and back sides and the left and right sides of the needle body for the binding thread to be inserted. Therefore, during the process of the top of the thread feeding needle returning to the binding hole, the thread feeding needle will not bring back the binding thread, thereby solving the problem that the thread feeding needle is prone to bring back the binding thread when resetting in the past. The overall structure is simple and compact, the processing is convenient and quick, and the workflow of the binding machine can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 is a schematic structural diagram of a novel thread feeding needle in an embodiment;

[0014] Figure 2 2 is a front view of the thread feeding needle in the embodiment. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

[0017] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0018] The present invention discloses a specific implementation of a new thread feeding needle, see Figure 1 to Figure 2 The thread feeding needle comprises a flat needle body 1, a cylindrical mounting portion 11 is formed at the bottom end of the needle body 1, and a U-shaped groove 12 is formed at the top end of the needle body 1. Like the conventional top thread needle for a binding machine, the bottom end of the needle body 1 is a cylindrical mounting portion 11, which is mainly used to connect with an external lifting mechanism, and the U-shaped groove 12 at the top end of the needle body 1 is mainly used to position and guide the binding thread during the thread feeding process, and the flat needle body 1 forms a thread avoidance space for the binding thread to be placed on both the front and rear sides of the needle body 1.

[0019] As an improvement, the top of the needle body 1 is provided with paired and mirror-imaged grooves 2, the opening direction of each groove 2 is the same as the opening direction of the U-shaped groove 12, and the paired grooves 2 are located below the U-shaped groove 12, so that the top of the needle body 1 forms two notches that are mirror-imaged and symmetrically arranged on the left and right sides of the needle body 1. In this way, another thread avoidance space can be formed on the left and right sides of the top of the needle body 1, so that there is a circular thread avoidance space between the top of the needle body 1 and the external binding hole. Compared with the previous arrangement of thread avoidance spaces only on the front and back sides, the top of the thread feeder needle is less likely to return with the thread during the return of the thread feeder needle.

[0020] In this embodiment, the cross-sectional shape of each groove 2 is a trapezoid. In other embodiments, the cross-sectional shape of each groove 2 can also be set to a U-shape, a dovetail shape or other shapes.

[0021] Optionally, the ratio of the width of the groove 2 to the length of the needle body 1 is 1:3-5, and the depth of the groove 2 is 0.5mm-2mm. This specification of the thread feeding needle can be used for most of the binding threads on the market.

[0022] A new type of thread feeding needle in the present embodiment is provided with a pair of grooves 2 on the top of the needle body 1. During the process of returning the thread feeding needle, the top of the needle body 1 passes through the binding hole. Due to the presence of the grooves 2, sufficient space is left on the front and back sides and the left and right sides of the needle body 1 for the binding thread to be inserted. Therefore, during the process of the top of the thread feeding needle returning through the binding hole, the thread feeding needle will not bring back the binding thread, thereby solving the problem that the thread feeding needle is prone to bring back the binding thread when resetting in the past. The overall structure is simple and compact, the processing is convenient and quick, and the workflow of the binding machine can be improved.

[0023] Finally, it should be noted that the new type of wire feeding needle disclosed in the embodiment of the present invention only discloses a preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions recorded in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel thread feeding needle, comprising a flat needle body, a cylindrical mounting portion formed at the bottom end of the needle body, and a U-shaped groove formed at the top end of the needle body, characterized in that: The top of the needle body is provided with paired and mirror-imaged grooves, the opening direction of each of the grooves is the same as the opening direction of the U-shaped groove, and the paired grooves are located below the U-shaped groove so that the top of the needle body forms two notches that are mirror-imaged and symmetrically arranged on the left and right sides of the needle body.

2. A new thread feeding needle according to claim 1, characterized in that: The cross-sectional shape of each of the grooves is a trapezoid.

3. A new thread feeding needle according to claim 1, characterized in that: The cross-section of each groove is U-shaped.

4. A new thread feeding needle according to claim 1, characterized in that: The ratio of the groove width to the length of the needle body is 1:3-5.

5. A new thread feeding needle according to claim 1, characterized in that: The groove depth of the groove is 0.5 mm to 2 mm.

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