Sewing machine needle bar assembly allowing temperature adjusting medium to flow in and needle bar structure of sewing machine needle bar assembly

Abstract

The utility model discloses a sewing machine needle bar assembly capable of allowing temperature adjusting media to flow in and a needle bar structure of the sewing machine needle bar assembly, and the sewing machine needle bar assembly capable of allowing the temperature adjusting media to flow in comprises a needle bar and a machine needle arranged at the bottom of the needle bar, a second communication channel communicated with the first communication channel is formed in the middle of the machine needle, a guide opening is formed in one end of the second communication channel and formed in the side wall of the machine needle, a first groove is formed in one side wall of the machine needle, a threading hole is formed in the machine needle, and a second groove is formed in the other side wall of the machine needle. And the first groove is connected between the guide port and one end of the threading hole. The needle bar structure comprises the sewing machine needle bar assembly allowing the temperature adjusting medium to flow in, the top of the first communication channel is communicated with a medium flow-in pipeline, one end of the medium flow-in pipeline is communicated with a switch adjusting valve, and one end of the switch adjusting valve is connected with a medium supply source.

Description

Technical Field

[0001] The utility model relates to the technical field of a sewing machine needle bar assembly, in particular to a sewing machine needle bar assembly into which a temperature regulating medium can flow and a needle bar structure thereof. Background Art

[0002] The needle bar assembly of a sewing machine refers to the component inside the sewing machine used to perform sewing up and down. It includes the needle bar and the needle. It is mainly responsible for lifting and reciprocating the thread, and then cooperates with the shuttle to hook the thread to form a cross-stitching seam line on the fabric.

[0003] The existing needle bar assembly has no openings and does not have the function of allowing the temperature control medium to flow in. Therefore, the needle bar assembly cannot be effectively temperature controlled. The purpose of the present utility model application is to overcome this technical problem.

[0004] (In addition, since the needle bar assembly of sewing machines on the market has no openings, all sewing machines on the market use an additional set of cooling devices to cool the sewing machines (this is because the needle bar assembly rubs against the sewing material at high speed when moving the thread up and down, thereby generating high temperature. Generally, high-end high-speed sewing machines try to be equipped with additional cooling devices). For example, the patent document number is CN211620830U, and the patent name is: A utility model patent for a needle cooling device in a sewing machine. The specific content of the patent is summarized as: using an additional needle cooling device to blow on the needle on the needle bar assembly to cool the needle, but the use of this additional needle cooling device has the following disadvantages:

[0005] 1. The additional needle cooling device will block the sewing operator's field of vision, making it difficult for the sewing operator to observe the sewing situation;

[0006] 2. The cooling speed is slow and the cooling is unstable;

[0007] 3. Because the additional needle cooling device is an additional installation, it can only be tilted towards the needle. As a result, during the sewing process, the cooling gas ejected by the needle cooling device has kinetic energy that is tilted downward (this kinetic energy is large relative to the thread). This downward kinetic energy causes the thread on the needle to be unevenly stressed and tangled, resulting in disordered rotation and entanglement, resulting in poor sewing quality.

[0008] 4. The additional needle cooling device can only provide a refrigerated air source, but in the face of some special sewing occasions, high temperature heating, liquid nitrogen, and oil temperature cooling are required, which cannot be achieved in this case. Utility Model Content

[0009] The purpose of the present utility model is to overcome the above-mentioned defects in the prior art and to provide a sewing machine needle bar assembly and a needle bar structure thereof into which a temperature-regulating medium can flow. The sewing needle bar assembly can allow the temperature-regulating medium to flow in, so that the sewing needle bar assembly itself can be temperature-regulated without causing disorder in the thread on the needle. Furthermore, the needle bar structure can provide the temperature-regulating medium to the sewing needle bar assembly, thereby ensuring that the sewing needle bar assembly can be temperature-regulated quickly and stably.

[0010] To achieve the above objectives, the present invention is implemented through the following two aspects:

[0011] In the first aspect, a sewing machine needle bar assembly into which a temperature regulating medium can flow includes a needle bar and a needle mounted at the bottom of the needle bar, a first connecting channel is provided in the middle of the needle bar, a second connecting channel connected to the first connecting channel is provided in the middle of the needle, a guide port is provided at one end of the second connecting channel, the guide port is provided on the side wall of the needle, a first groove is provided on one side wall of the needle, a threading hole is provided on the needle, and the first groove is connected between the guide port and one end of the threading hole.

[0012] Preferably, the first connecting channel includes a medium inlet channel opened in the upper middle part of the needle rod, a first medium channel connected to the bottom of the medium inlet channel, and a needle installation channel connected to the bottom of the first medium channel, and the needle is inserted into the needle installation channel.

[0013] Preferably, the second connecting channel includes a second medium flow channel opened in the upper middle part of the needle and connected to the first medium flow channel, the bottom of the second medium flow channel is connected to a guide channel, and the guide port is installed at one end of the guide channel.

[0014] Preferably, a transition chamfer is provided between the medium inlet flow channel and the first medium flow channel.

[0015] Preferably, a second inlet is provided at the top of the second medium flow channel, and the second inlet is provided at the top middle portion of the needle.

[0016] Preferably, the guide channel is inclined.

[0017] Preferably, a first inlet is provided at the top of the medium inlet channel, and the first inlet is provided at the top middle portion of the needle rod.

[0018] Preferably, a smooth chamfered portion is provided on the top of the needle.

[0019] Preferably, the other side wall of the needle is provided with a second groove, and the bottom of the second groove is connected to the top of the other end of the threading hole.

[0020] In the second aspect, a needle bar structure includes a sewing machine needle bar assembly as described in the first aspect, into which a temperature-regulating medium can flow. The top of the first connecting channel of the needle bar of the sewing machine needle bar assembly into which a temperature-regulating medium can flow is connected to a medium inflow pipeline, one end of the medium inflow pipeline is connected to a switch regulating valve, and one end of the switch regulating valve is connected to a medium supply source.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The utility model is provided with a sewing machine needle bar assembly into which a temperature-regulating medium can flow, wherein the first connecting channel of the needle bar is for a medium supply source to flow in, and then the medium on the first connecting channel flows to the second connecting channel of the machine needle, and the second connecting channel flows out from the guide port, and the medium continues to flow along the first groove at the bottom of the guide port to the threading hole, so that the sewing needle bar assembly itself can be temperature-regulated without causing disorder of the thread on the machine needle.

[0023] 2. The utility model provides a needle bar structure, which controls the size of the medium source of the medium supply source entering the medium inflow pipeline by switching the regulating valve on or off or adjusting the size, and finally controls the size of the medium source of the sewing machine needle bar assembly, thereby ensuring that the sewing needle bar assembly can be quickly and stably temperature-controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a structural schematic diagram of a sewing machine needle bar assembly provided in Example 1 of the present utility model, through which a temperature regulating medium can flow, from one side perspective;

[0026] Figure 2 This is a structural schematic diagram of a sewing machine needle bar assembly provided in Example 1 of the present utility model, through which a temperature regulating medium can flow, viewed from another side;

[0027] Figure 3 This is a front cross-sectional schematic diagram of a sewing machine needle bar assembly into which a temperature regulating medium can flow, provided in Example 1 of the present utility model;

[0028] Figure 4 yes Figure 3 An enlarged view of the part pointed by the letter A;

[0029] Figure 5It is a structural schematic diagram of the machine needle provided in Example 1 of the present utility model.

[0030] Included in the diagram are:

[0031] 1. Needle bar; 2. Needle; 3A. First connecting channel; 3B. Second connecting channel; 30. First inlet; 31. Medium inlet channel; 310. Transition chamfered portion; 32. First medium channel; 320. Abutting surface; 33. Needle mounting channel; 330. Smooth chamfered portion; 34. Second inlet; 35. Second medium channel; 36. Guide channel; 37. Guide port; 38. First groove; 4. Threading hole; 5. Second groove. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in this embodiment of the present invention to clearly and completely describe the technical solution in this embodiment of the present invention. Obviously, the embodiment described is only one embodiment of the present invention, not all embodiments of the present invention. Based on this embodiment of the present invention, all other embodiments of the present invention obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this utility model.

[0033] Example 1:

[0034] See also Figures 1 to 5 An embodiment of the present invention provides a sewing machine needle bar assembly into which a temperature regulating medium can flow, comprising a needle bar 1 and a needle 2 mounted at the bottom of the needle bar 1, a first connecting channel 3A being provided in the middle of the needle bar 1, a second connecting channel 3B being provided in the middle of the needle 2 and communicating with the first connecting channel 3A, a guide opening 37 being provided at one end of the second connecting channel 3B, the guide opening 37 being provided on the side wall of the needle 2, a first groove 38 being provided on one side wall of the needle 2, a threading hole 4 being provided on the needle 2, and the first groove 38 being connected between the guide opening 37 and one end of the threading hole 4.

[0035] The first connecting channel 3A includes a medium inlet channel 31 opened in the middle upper part of the needle rod 1, a first medium channel 32 connected to the bottom of the medium inlet channel 31, and a needle installation channel 33 connected to the bottom of the first medium channel 32. The needle 2 is inserted into the needle installation channel 33.

[0036] The second connecting channel 3B includes a second medium flow channel 35 opened in the upper middle section of the needle 2 and connected to the first medium flow channel 32 . The bottom of the second medium flow channel 35 is connected to a guide channel 36 , and a guide port 37 is installed at one end of the guide channel 36 .

[0037] A transition chamfer 310 is provided between the medium inlet channel 31 and the first medium flow channel 32. The functions of the transition chamfer 310 are: first, to facilitate the introduction of the medium source into the first medium flow channel 32; second, to prevent stress concentration and cracking at the bottom of the medium inlet channel 31 due to larger medium.

[0038] A second inlet 34 is provided at the top of the second medium flow channel 35 , and the second inlet 34 is located at the top middle portion of the needle 2 .

[0039] The guide channel 36 is inclined.

[0040] A first inlet 30 is provided at the top of the medium inlet channel 31 , and the first inlet 30 is provided at the top middle portion of the needle rod 1 .

[0041] A smooth chamfered portion 330 is provided on the top of the needle 2. The smooth chamfered portion 330 facilitates the insertion of the needle 2 into the needle installation channel 33.

[0042] A second groove 5 is formed on the other side wall of the needle 2 , and the bottom of the second groove 5 is connected to the top of the other end of the threading hole 4 .

[0043] The diameter of the medium inlet channel 31 is larger than that of the first medium channel 32, and the diameter of the needle installation channel 33 is larger than that of the first medium channel 32. The medium inlet channel 31 provides a larger and more sufficient medium source to ensure continuous medium entry, thereby ensuring stable temperature control.

[0044] Abutment surface 320 is provided between the first medium flow channel 32 and the needle mounting channel 33. The top of the needle 2 abuts against the abutment surface 320, thereby ensuring a stable vertical installation of the needle 2. Furthermore, a threaded mounting hole is provided on the side wall at the bottom of the needle bar 1, which is connected to the needle mounting channel 33. A screw is screwed through the threaded mounting hole, tightening the screw against the needle 2, thereby ensuring a stable vertical installation of the needle 2.

[0045] The working principle of a sewing machine needle bar assembly capable of allowing a temperature regulating medium to flow into an embodiment of the present utility model is explained in the following second embodiment.

[0046] The working advantages of a sewing machine needle bar assembly capable of allowing a temperature regulating medium to flow into the embodiment of the present utility model are explained in the following embodiment 2.

[0047] Example 2:

[0048] An embodiment of the present utility model provides a needle bar 1 structure, including a sewing machine needle bar assembly into which a temperature-regulating medium can flow as described in Example 1, wherein the top of the first connecting channel 3A of the needle bar 1 of the sewing machine needle bar assembly into which a temperature-regulating medium can flow is connected to a medium inflow pipeline, one end of the medium inflow pipeline is connected to a switch regulating valve, and one end of the switch regulating valve is connected to a medium supply source.

[0049] Among them, the above-mentioned medium inflow pipeline, switch regulating valve and medium supply source are existing technologies and are not shown in the accompanying drawings.

[0050] The working principle of this needle bar structure is:

[0051] S1: The medium supply source provides a gaseous medium or a liquid medium. The gaseous medium includes warm water vapor, high-temperature gas (some sewing materials are brittle in cold conditions and require the needle 2 to be heated to achieve better sewing results), cold air (some sewing materials cause the needle 2 to become hot during sewing friction, which can easily melt the sewing materials and requires the needle 2 to be cooled). The liquid medium includes liquid nitrogen (which has a good cooling effect and is suitable for expensive or new sewing materials).

[0052] S2: By switching the regulating valve on and off and controlling the size, the medium supply source is controlled to provide a certain amount, which is then delivered to the first inlet 30 of the medium inflow channel of the needle rod 1 through the medium inflow pipeline;

[0053] S3: Then, the medium in the medium inflow channel flows sequentially to the first medium flow channel 32, the second medium flow channel 35, the guide channel 36 and the guide port 37 of the guide channel 36;

[0054] S4: Then, the medium source has downward kinetic energy, which pushes the medium source downward from the first groove 38, so that the medium source flows downward along the first groove 38 to the threading hole 4, thereby quickly and stably adjusting the temperature of the entire machine needle 2.

[0055] S5: Furthermore, the first groove 38 is longer than the second groove 5. In actual work, the thread of the needle 2 passes through the threading hole 4 on one side of the long first groove 38 to the other end of the threading hole 4 on the side of the short second groove 5 (this is based on the actual regulations of the sewing machine structure, and this cannot be reversed. Otherwise, sewing cannot work normally). Since the medium source flows downward and the direction of the medium source flow is away from the other end of the threading hole 4, the thread in the threading hole 4 will not be disordered, ensuring that the thread of the needle 2 and the hook of the shuttle cooperate normally.

[0056] The working advantages of this needle bar 1 structure are: by switching the regulating valve on and off or adjusting the size, the size of the medium source entering the medium inflow pipeline is controlled, and finally the size of the medium source of the sewing machine needle 2 rod 1 assembly is controlled, thereby ensuring that the sewing needle bar 1 assembly can quickly and stably adjust the temperature of the medium flowing out of its own top, and at the same time will not cause the thread on the machine needle 2 to be disordered.

[0057] Example 3:

[0058] The embodiment of the present utility model provides a sewing machine head (the head is prior art and not shown in the accompanying drawings). The sewing machine head is equipped with a sewing machine needle bar assembly as described in the first embodiment, into which a temperature-regulating medium can flow. A medium supply source is installed on the outer side of the sewing machine head. The medium supply source is connected to an on-off regulating valve. The on-off regulating valve is connected to a medium inlet pipeline. The medium inlet pipeline is connected to the medium inlet flow channel 31 of the needle bar 1 of the sewing machine needle bar assembly. The medium inlet pipeline runs through the top of the sewing machine head.

[0059] Example 4:

[0060] An embodiment of the present utility model provides a method for manufacturing a sewing machine needle bar assembly capable of allowing a temperature regulating medium to flow in, as described in the first embodiment.

[0061] The needle bar 1 can be machined or injection molded.

[0062] The needle 2 can be machined (by drilling an oblique hole in the guide channel 36) or injection molded.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sewing machine needle bar assembly into which a temperature regulating medium can flow, characterized in that: The present invention comprises a needle bar (1) and a machine needle (2) mounted at the bottom of the needle bar (1), wherein a first connecting channel (3A) is provided in the middle of the needle bar (1), a second connecting channel (3B) connected to the first connecting channel (3A) is provided in the middle of the machine needle (2), a guide opening (37) is provided at one end of the second connecting channel (3B), the guide opening (37) is provided on the side wall of the machine needle (2), one side wall of the machine needle (2) is provided with a first groove (38), a threading hole (4) is provided on the machine needle (2), and the first groove (38) is connected between the guide opening (37) and one end of the threading hole (4).

2. A sewing machine needle bar assembly capable of allowing a temperature regulating medium to flow into according to claim 1, characterized in that: The first connecting channel (3A) comprises a medium inlet channel (31) opened in the middle upper section of the needle rod (1), a first medium channel (32) connected to the bottom of the medium inlet channel (31), and a machine needle installation channel (33) connected to the bottom of the first medium channel (32), and the machine needle (2) is inserted into the machine needle installation channel (33).

3. A sewing machine needle bar assembly capable of allowing a temperature regulating medium to flow into according to claim 2, characterized in that: The second connecting channel (3B) includes a second medium flow channel (35) opened in the upper middle section of the machine needle (2) and connected to the first medium flow channel (32); the bottom of the second medium flow channel (35) is connected to a guide channel (36), and the guide port (37) is installed at one end of the guide channel (36).

4. A sewing machine needle bar assembly capable of allowing a temperature regulating medium to flow into according to claim 3, characterized in that: A transition chamfer (310) is provided between the medium inlet flow channel (31) and the first medium flow channel (32).

5. The sewing machine needle bar assembly capable of allowing a temperature regulating medium to flow into according to claim 3, characterized in that: A second inlet (34) is provided at the top of the second medium flow channel (35), and the second inlet (34) is provided at the top of the middle portion of the machine needle (2).

6. A sewing machine needle bar assembly capable of allowing a temperature regulating medium to flow into according to claim 3, characterized in that: The guide channel (36) is inclined.

7. A sewing machine needle bar assembly capable of allowing a temperature regulating medium to flow into according to claim 2, characterized in that: A first inlet (30) is provided at the top of the medium inlet channel (31), and the first inlet (30) is provided at the top middle portion of the needle rod (1).

8. The sewing machine needle bar assembly capable of allowing a temperature regulating medium to flow into according to claim 1, characterized in that: The top of the needle (2) is provided with a smooth chamfered portion (330).

9. The sewing machine needle bar assembly capable of allowing a temperature regulating medium to flow into according to claim 1, characterized in that: The other side wall of the needle (2) is provided with a second groove (5), and the bottom of the second groove (5) is connected to the top of the other end of the threading hole (4).

10. A needle bar structure, characterized in that: The invention comprises a sewing machine needle bar assembly into which a temperature regulating medium can flow as described in any one of claims 1 to 9, wherein the top of the first connecting passage (3A) of the needle bar (1) of the sewing machine needle bar assembly into which a temperature regulating medium can flow is connected to a medium inflow pipeline, one end of the medium inflow pipeline is connected to a switch regulating valve, and one end of the switch regulating valve is connected to a medium supply source.

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