Needle protection device for fine needle syringe

Abstract

The present invention provides a needle guard device for a fine needle syringe, comprising: a needle guard spring, which is a spiral formed by curling a wire; the cross-section of the needle guard spring is rectangular; the needle guard spring is connected head to tail to form a circular ring; the needle guard spring provided by the present invention makes it possible to use knitting needles below 0.3 mm without the knitting needles shaking at high speeds to cause the cloth surface to become sparse; it also makes it possible to operate at high speeds while ensuring that the cloth surface is finer and the appearance is better when working with fine needles, thereby improving production efficiency; it also breaks the current industry bottleneck, making it possible to use fine needles below 0.21 mm in industrial production, and to produce cloth with a finer surface and better appearance.

Description

Technical Field

[0001] The invention relates to a needle protection device for a fine needle syringe. Background Art

[0002] like Figure 1 As shown, the lower needle cylinder 1 of the circular knitting machine is provided with a plurality of knitting needles 111. In order to prevent the knitting needles 111 from falling out of the needle groove 11 during the up and down movement, a needle guard spring 2 is provided at the groove on the outer cylindrical surface of the lower needle cylinder 1. The needle guard spring 2 is formed by a common needle guard spring in a circle, so that the whole circle has a certain elasticity, which ensures that the knitting needles are surrounded and will not fall out, and can also ensure that the knitting needles can keep moving up and down.

[0003] Currently, if Figure 2-Figure 3 As shown, the commonly used needle guard spring 2 on the market has an outer diameter of 2.5 to 2.8 mm, the steel wire cross-section 21 is circular, the wire diameter is about 0.5 mm, the pitch is about 0.5 mm, and the length of the entire needle guard spring is determined according to the circumference of the outer cylindrical surface of the syringe of various sizes; the syringe currently used uses the outer nominal diameter, the number of needles per inch, and the total number of needles to indicate the model of the syringe, and the commonly used nominal diameters are 30 inches, 34 inches and 38 inches; the commonly used number of needles is 28G, and the current maximum number of needles is 54G. The more the number of needles, the finer the cloth surface and the better the appearance; with the increasing use of knitting needles below 0.3 mm (the finest knitting needles currently used are 0.21 mm knitting needles, which are only suitable for low-speed operation, and those less than 0.21 mm are difficult to use in industrial production), there is no problem when running at low speed, but high-speed operation will cause the knitting needles 111 to shake, thereby causing the cloth surface to become thin. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects and avoid the situation where the fabric surface is sparse. The inventors found that the reason why knitting below 0.3 mm shakes is that the knitting needle is protected by the existing needle guard spring 2. Since the needle guard spring 2 is a round steel wire, the steel wires present a continuous semicircular cross-sectional profile. When the knitting needle moves up and down, the knitting needle larger than 0.3 mm is not much different from the gap between adjacent steel wires, and it is not easy to squeeze into the gap, and the shaking is not large. The knitting needle less than or equal to 0.3 mm is smaller than the gap between adjacent steel wires (such as Figure 3 As shown in the figure, when the high-speed knitting needle is subjected to a relatively large outward centrifugal force, the knitting needle will be squeezed in along the semicircular arc, which causes the knitting needle to shake greatly when moving up and down, resulting in a sparse cloth surface, and the thinner the knitting needle, the more serious this phenomenon is; based on this, the inventors have conducted research and provided a needle protection device for a fine needle syringe.

[0005] The present invention adopts the following technical solutions:

[0006] A needle guard device for a fine needle syringe comprises: a needle guard spring which is a spiral formed by curling a wire; the cross section of the needle guard spring is rectangular; the needle guard spring is connected head to tail to form a circular ring.

[0007] Preferably, the cross section of the needle guard spring is a square; the pitch of the needle guard spring is equal to the side length of the cross section of the needle guard spring.

[0008] Preferably, the cross-sectional side length of the needle guard spring is 0.5 mm; the pitch of the needle guard spring is 0.5 mm.

[0009] Preferably, the cross-section of the needle guard spring is rectangular.

[0010] Preferably, the aspect ratio of the cross section of the needle guard spring is 4:1; the pitch of the needle guard spring is equal to the length of the cross section of the needle guard spring.

[0011] Preferably, the length of the cross section of the needle guard spring is 2 mm; the width of the cross section of the needle guard spring is 0.5 mm; and the pitch of the needle guard spring is 2 mm.

[0012] Preferably, the wire is made of steel, alloy or non-ferrous metal.

[0013] Preferably, the wire has a rounded corner of 0.075 mm.

[0014] The beneficial effects of the present invention are as follows: the needle guard spring provided by the present invention ensures that when knitting needles below 0.3 mm are used, the knitting needles will not shake and cause the cloth surface to become sparse even when the knitting needles are operated at high speed; it also ensures that when fine needles are used, the knitting needles can be operated at high speed while ensuring that the cloth surface is finer and the appearance is better, thereby improving production efficiency; it also breaks the current industry bottleneck, making it possible to use fine needles below 0.21 mm in industrial production, and can produce cloth with a finer surface and better appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the lower needle cylinder of the existing circular knitting machine of the present invention.

[0016] Figure 2 It is a schematic diagram of an existing needle guard spring and a knitting needle.

[0017] Figure 3 It is a cross-sectional view of the existing needle guard spring and the knitting needle of the present invention.

[0018] Figure 4 It is a cross-sectional view of a needle guard spring and a knitting needle according to an embodiment of the present invention.

[0019] Figure 5 It is a cross-sectional view of the needle guard spring and the knitting needle according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose and technical solution of the present invention clearer, the present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0021] Embodiment 1:

[0022] A needle guard device for a fine needle syringe comprises: a needle guard spring 3 which is a spiral formed by curling a wire; a cross section 31 of the needle guard spring 3 is rectangular; and the needle guard spring 3 is connected head to tail to form a circular ring.

[0023] Preferably, Figure 4 As shown, the cross section 31 of the needle guard spring 3 is a square; the pitch of the needle guard spring 3 is equal to the side length of the cross section of the needle guard spring 3 .

[0024] Preferably, the side length of the cross section of the needle guard spring 3 is 0.5 mm; the pitch of the needle guard spring 3 is 0.5 mm.

[0025] Preferably, the wire has a rounded corner of 0.075 mm.

[0026] Figure 4 The knitting needle in the middle is 0.21mm, and the fillet of the knitting needle 111 is generally 0.03-0.05mm. The steel wires of the needle guard spring 3 form a close contact surface, presenting a continuous straight line cross-sectional profile, which makes it impossible for the knitting needle 111 to enter the gap between the two sections of the needle guard spring. When zoomed in, there is still a gap between the steel wires of the needle guard spring 3. This is because when the steel wire is manufactured, due to the existing process conditions, there will be fillets (the steel wire without fillets cannot be manufactured, and the fillet can only be as small as possible). On the basis of maintaining the cost, the fillet of the steel wire of the needle guard spring can be 0.075mm. If it is smaller, the manufacturing cost is too high. After using it for a period of time, the wear between the steel wires of the knitting needle will cause wear between adjacent steel wires. After reaching a certain width, the knitting needle will shake when it moves up and down here. At this time, the needle guard spring needs to be replaced. Compared with the previous needle guard spring with a circular cross-section, the advantage is that: within a certain period of time, the knitting needle will not shake, avoiding the problem of thinning of the cloth surface.

[0027] In order to further solve the problem that the needle guard spring will not cause the knitting needle to shake during long-term use of knitting, the inventor proposes the following solution:

[0028] Embodiment 2:

[0029] Preferably, Figure 5 As shown, the cross section 31 of the needle guard spring 3 is rectangular.

[0030] Preferably, the aspect ratio of the cross section of the needle guard spring is 4:1; the pitch of the needle guard spring is equal to the length of the cross section of the needle guard spring.

[0031] Preferably, the length of the cross section of the needle guard spring is 2 mm; the width of the cross section of the needle guard spring is 0.5 mm; the pitch of the needle guard spring is 2 mm, and the fillet of the steel wire of the needle guard spring in this embodiment can also be 0.075 mm.

[0032] Preferably, the wire is made of steel, alloy or non-ferrous metal.

[0033] Preferably, the wire has a rounded corner of 0.075 mm.

[0034] The needle guard spring presents a continuous straight line cross-sectional profile, and the overlapping parts between the straight lines are very large (that is, the gap between the steel wires of adjacent needle guard springs presents an inclined gap 32 with a relatively large slope). After long-term use, the wear of the needle guard spring by the knitting needle 111 will not cause the continuous straight line to break (that is, the knitting needle 111 can only move up and down and cannot enter the inclined gap, so there will be no knitting needle shaking); the advantage of this embodiment over the first embodiment is that there is no need to stop the machine after a period of time to replace the needle guard spring, which saves the cost of replacing the needle guard spring and prevents the occurrence of thinning of the fabric surface.

[0035] In the description of the invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The components used in the present invention are all universal standard parts or components known to technical personnel in this field. Their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods. For example, data such as the length and elastic coefficient of the needle guard spring are currently designed based on the actual radius of the lower syringe. They are conventional designs and will not be elaborated in the present invention.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A needle protection device for a fine needle syringe, characterized in that: include: The needle guard spring is a spiral formed by curling wire; The needle guard spring is connected head to tail to form a circular ring; The cross section of the needle guard spring is a square; The pitch of the needle guard spring is equal to the side length of the cross section of the needle guard spring; The cross-sectional side length of the needle guard spring is 0.5 mm; The pitch of the needle guard spring is 0.5 mm.

2. A needle protection device for a fine needle syringe, characterized in that: The needle guard spring is a spiral formed by curling wire; The needle guard spring is connected head to tail to form a circular ring; The cross section of the needle guard spring is rectangular; The aspect ratio of the cross section of the needle guard spring is 4:1; The pitch of the needle guard spring is equal to the length of the cross section of the needle guard spring; The length of the cross section of the needle guard spring is 2 mm; The width of the cross section of the needle guard spring is 0.5 mm; The pitch of the needle guard spring is 2 mm.

3. A needle protection device for a fine needle syringe according to claim 1 or 2, characterized in that: The wire material is alloy or non-ferrous metal.

4. A needle protection device for a fine needle syringe according to claim 3, characterized in that: The rounded corners of the wire are 0.075 mm.

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