A stethoscope heating and heat preservation device and its manufacturing process

Abstract

This invention discloses a stethoscope heating and insulation device and its manufacturing process. The device includes a bag body with an internal partition. The partition separates the bag body into an insulation cavity and an installation cavity. The insulation cavity can hold the stethoscope head, and the installation cavity contains a power source. A heating ring is located inside the partition, and the heating ring is connected to the power source via a wiring harness. The heating ring heats the stethoscope head. This invention, by manufacturing the bag body and partition into an insulated bag, can heat and insulate the stethoscope head, enabling patients to listen to their auscultation with a warm stethoscope head during cold winters, reducing patient discomfort.

Description

Technical Field

[0001] This invention relates to the field of medical auxiliary products technology, and more specifically, to a stethoscope heating and heat preservation device and its manufacturing process. Background Technology

[0002] The stethoscope plays a vital role in clinical practice and is an essential tool for doctors, especially cardiologists and pulmonologists. Stethoscopes are advantageous due to their ease of operation, low cost, and wide applicability. Currently, the commonly used flat stethoscope head has a thin membrane in the middle and a metal outer edge on the surface that contacts the patient. In cold weather, when patients come to the clinic, medical staff need to place the stethoscope directly in contact with the patient's skin for auscultation. However, the contact between the metal part and the patient's skin causes discomfort due to the cold temperature, leading to poor auscultation results. Therefore, there is an urgent need for improvement. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a stethoscope heating and insulation device and its manufacturing process. By making the bag body and partition into an insulation bag, the stethoscope head can be heated and kept warm, so that patients can listen to the patient with a warm stethoscope head in the cold winter, reducing the patient's discomfort.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This invention discloses a stethoscope heating and insulation device, comprising a bag body with a partition inside the bag body. The partition separates the insulation cavity and the mounting cavity, where the stethoscope head can be placed. A power source is provided in the mounting cavity. A heating ring is provided inside the partition, and the heating ring is connected to the power source via a wiring harness. The heating ring can heat the stethoscope head.

[0006] Furthermore, the partition includes a sheet and an adhesive film, one side of the sheet is connected to the bag body and the other side is heat-fused to the adhesive film, and the heating ring is located between the sheet and the adhesive film.

[0007] Furthermore, the stethoscope head includes a metal sleeve and a diaphragm, and a heat insulation ring is provided inside the heating ring. The outer diameter of the heat insulation ring is larger than the inner diameter of the metal sleeve and smaller than the outer diameter of the metal sleeve. The inner diameter of the heating ring is larger than the outer diameter of the diaphragm and smaller than the outer diameter of the metal sleeve. The outer diameter of the heating ring is larger than the outer diameter of the metal sleeve.

[0008] Furthermore, the sheet body has a groove on the side facing the heat insulation cavity. The groove is located inside the heat insulation ring. The sheet body located at the groove is thermally fused to the adhesive film, and the film is directly opposite the groove.

[0009] Furthermore, the bag body includes an integrally formed rear panel, front panel, and flap, the flap being disposed on the upper part of the rear panel, the sheet being fixed to the rear panel, the heat insulation cavity being located between the rear panel and the partition, and the mounting cavity being located between the front panel and the partition.

[0010] Furthermore, a first magnet is fixed to the inner side of the flip cover, and a second magnet is fixed to the outer side of the front cover. The first magnet can attract the second magnet so that the flip cover covers the insulation cavity and the mounting cavity. A cut is provided inside the flip cover.

[0011] Furthermore, the bag body is provided with a heat insulation sheet, which is fixed to the inner side of the rear baffle and the partition on one side of the film sheet.

[0012] Furthermore, the heat insulation sheet includes a first heat insulation part and a second heat insulation part. A second adhesive sheet is provided on one side of the first heat insulation part, and a third adhesive sheet is provided on the side of the second heat insulation part opposite to the second adhesive sheet. The second adhesive sheet is adhered and fixed to the inner side of the rear bumper, and the third adhesive sheet is adhered and fixed to the partition on one side of the film sheet.

[0013] Furthermore, a U-shaped first adhesive piece is provided on the side of the sheet away from the adhesive film, and the first adhesive piece is adhered and fixed to the first heat insulation part.

[0014] A manufacturing process for a stethoscope heating and heat preservation device includes the following steps:

[0015] S1. Unfold the bag and place the heat insulation sheet flat on the surface of the bag. The first heat insulation part of the heat insulation sheet is located at the back panel and the second heat insulation part is located at the front panel. Then, attach and fix the first heat insulation part to the back panel using the second adhesive piece.

[0016] S2. Place the partition on the surface of the first heat insulation part with the wire harness facing upward, and fix the partition to the first heat insulation part with the first adhesive piece so that a heat insulation cavity is formed between the rear panel and the partition.

[0017] S3. Flip the second heat insulation part upward along the lower edge of the partition, and use the third adhesive piece to stick and fix the second heat insulation part to the partition on one side of the adhesive film.

[0018] S4. Flip the front windshield upwards along the fold line so that the two sides of the front windshield are close to the two sides of the rear windshield, and sew the front windshield and rear windshield together with a sewing machine.

[0019] S5. Complete production.

[0020] The beneficial effects of this invention are:

[0021] 1. When using, insert the stethoscope head into the heat preservation cavity. The heating ring can heat the heat preservation cavity, thereby heating the stethoscope head. This is beneficial for listening to patients with a warm stethoscope head in cold winter, reducing patient discomfort.

[0022] 2. By setting a heat insulation ring inside the heating ring, the heating ring can directly heat the metal sleeve, improving the heating effect of the metal sleeve and greatly reducing the heating effect of the heating ring on the film, effectively avoiding the heating ring directly heating the film and thus reducing the service life of the film. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the invention.

[0024] Figure 2 This is a cross-sectional view of the present invention;

[0025] Figure 3 This is a diagram showing the unfolded shape of the bag.

[0026] Figure 4 This is a schematic diagram of the structure of a thermal insulation sheet;

[0027] Figure 5 This is a manufacturing process diagram for the partition;

[0028] Figure 6 This is a manufacturing process diagram of the present invention;

[0029] Figure 7 A schematic diagram of a heat press for making partitions in its first state;

[0030] Figure 8 for Figure 7 A partial schematic diagram;

[0031] Figure 9 A schematic diagram of a heat press for making partitions in its second state;

[0032] Figure 10 This is a partial sectional view of the ironing machine;

[0033] Figure 11 for Figure 10 Enlarged view at point A.

[0034] Reference numerals: 1. Bag body; 11. Rear flap; 12. Front flap; 13. Flip flap; 14. First magnet; 15. Second magnet; 16. Cutout; 17. Insulation cavity; 18. Mounting cavity; 19. Fold line; 2. Partition; 21. Sheet; 211. Groove; 22. Heating ring; 221. Wire harness; 23. Heat insulation ring; 24. Adhesive film; 25. First adhesive sheet; 3. Heat insulation sheet; 31. First heat insulation part; 32. Second heat insulation part; 33. Second adhesive sheet; 34. Third adhesive sheet 4. Power supply; 5. Base; 51. Workbench; 511. Hinge; 52. Support frame; 53. Lifter; 54. Bracket; 6. Hot melt table; 61. Limiting groove; 62. Positioning groove; 63. Clearance groove; 7. Flip plate; 71. Clearance opening; 72. Handle; 8. Stamping mechanism; 81. Stamping block; 811. Boss; 812. Ring platform; 813. Notch; 82. Pressure plate; 83. Push plate; 84. Spring; 9. Stethoscope head; 91. Metal sleeve; 92. Membrane; 100. Infrared instrument. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figures 1 to 6 As shown, a stethoscope heating and insulation device includes a bag body 1. A partition 2 is provided inside the bag body 1, separating an insulation cavity 17 and an installation cavity 18. The insulation cavity 17 can hold a stethoscope head 9, and the installation cavity 18 contains a power supply 4. A heating ring 22, a composite superconducting fiber heating ring, is provided inside the partition 2. The heating ring 22 is connected to the power supply 4 via a wiring harness 221. The heating ring 22 can heat the stethoscope head 9. The heating ring 22 is electrically heated, and the method of heating the heating ring 22 via the power supply 4 is existing technology; its principle will not be elaborated in this specification. In use, the stethoscope head 9 is inserted into the insulation cavity 17. The heating ring 22 heats the insulation cavity 17, thereby heating the stethoscope head 9. This is beneficial for using a warm stethoscope head 9 to auscultate patients in cold winters, reducing patient discomfort.

[0037] like Figure 3As shown, the bag body 1 includes an integrally formed rear panel 11, front panel 12, and flip cover 13. The flip cover 13 is located on the upper part of the rear panel 11. A first magnet 14 is fixed inside the flip cover 13, and a second magnet 15 is fixed outside the front panel 12. The first magnet 14 can be attracted to the second magnet 15 so that the flip cover 13 covers the insulation cavity 17 and the mounting cavity 18. The flip cover 13 has a slit 16 inside. The stethoscope consists of a stethoscope head 9, a stethoscope tube, and an earpiece. The stethoscope tube can pass through the slit 16, thereby connecting the bag body 1 and the stethoscope. This allows the stethoscope head 9 to be inserted into the insulation cavity 17 after use. Through the cooperation of the first magnet 14 and the second magnet 15, not only can the insulation effect of the insulation cavity 17 be improved, but it is also convenient to open the flip cover 13 to take out the stethoscope head 9, making it easy to use.

[0038] like Figure 2 As shown, the partition 2 includes a sheet 21 and a diaphragm 24. The sheet 21 is fixed to the rear baffle 11. The heat preservation cavity 17 is located between the rear baffle 11 and the partition 2. The mounting cavity 18 is located between the front baffle 12 and the partition 2. One side of the sheet 21 is connected to the bag body 1 and the other side is heat-fused to the diaphragm 24. The heat-fusion fixing method of the sheet 21 and the diaphragm 24 is existing technology, and its heat-fusion fixing principle will not be elaborated in this specification. The heating ring 22 is located between the sheet 21 and the diaphragm 24. The sheet 21 is made of fabric and its size is larger than that of the diaphragm 24. The sheet 21 and the diaphragm 24 are heat-fused to effectively fix the heating ring 22 between them, which can both fix the heating ring 22 and protect the heating ring 22, preventing the heating ring 22 from directly contacting the stethoscope head 9.

[0039] The stethoscope head 9 includes a metal sleeve 91 and a diaphragm 92. The heating ring 22 is provided with a heat insulation ring 23. The outer diameter of the heat insulation ring 23 is larger than the inner diameter of the metal sleeve 91 and smaller than the outer diameter of the metal sleeve 91. The inner diameter of the heating ring 22 is larger than the outer diameter of the diaphragm 92 and smaller than the outer diameter of the metal sleeve 91. The outer diameter of the heating ring 22 is larger than the outer diameter of the metal sleeve 91.

[0040] By setting a heat insulation ring 23 inside the heating ring 22, the heating ring 22 can directly heat the metal sleeve 91, improving the heating effect of the metal sleeve 91, and also greatly reducing the heating effect of the heating ring 22 on the film 92, effectively avoiding the heating ring 22 directly heating the film 92 and thus reducing the service life of the film 92.

[0041] The sheet 21 has a groove 211 on the side facing the heat insulation cavity 17. The groove 211 is located inside the heat insulation ring 23. The sheet 21 located at the groove 211 is thermally fused to the diaphragm 24. The film 92 is directly opposite the groove 211. By setting the heat insulation ring 23, when the sheet 21 is thermally fused to the diaphragm 24, the area in the middle of the heat insulation ring 23 can also be thermally fused together. The groove 211 structure not only makes the position fixation of the heating ring 22 and the heat insulation ring 23 more reliable, but also reduces the contact area between the film 92 and the sheet 21, preventing the film 92 from being deformed due to pressure when the stethoscope head 9 is inserted into the heat insulation cavity 17.

[0042] like Figure 2 and Figure 4 As shown, the bag body 1 is provided with a heat insulation sheet 3. The heat insulation sheet 3 is fixed to the inner side of the back panel 11 and the partition 2 on one side of the adhesive film 24. Specifically, the heat insulation sheet 3 includes a first heat insulation part 31 and a second heat insulation part 32. The first heat insulation part 31 and the second heat insulation part 32 are integrally formed and made of heat insulation cotton. A second adhesive sheet 33 is provided on one side of the first heat insulation part 31, and a third adhesive sheet 34 is provided on the side of the second heat insulation part 32 opposite to the second adhesive sheet 33. The second adhesive sheet 33 and the third adhesive sheet 34 are double-sided adhesive tapes of heat-insulating aluminum foil. The second adhesive sheet 33 is adhered and fixed to the inner side of the back panel 11, and the third adhesive sheet 34 is fixed to the inner side of the back panel 11. The sheet 34 and the partition 2 are attached and fixed on one side of the diaphragm sheet 24. The sheet body 21 is provided with a U-shaped first adhesive sheet 25 on the side away from the diaphragm sheet 24. The first adhesive sheet 25 is attached and fixed to the first heat insulation part 31. The thickness of the first adhesive sheet 25 is three millimeters. By setting the heat insulation sheet 3, not only can the heat insulation cavity 17 be insulated, but the heat conduction of the heating ring 22 into the mounting cavity 18 can also be reduced, preventing the power supply 4 from overheating. By setting the U-shaped first adhesive sheet 25 with a certain thickness, a U-shaped heat insulation cavity 17 can be formed, which can not only realize the placement limit of the stethoscope head 9, but also reduce the compression of the stethoscope head 9 by the heat insulation cavity 17.

[0043] like Figure 2 , Figure 3 and Figure 6 As shown, the manufacturing process of a stethoscope heating and heat preservation device includes the following steps:

[0044] S1, such as Figure 6 As shown in a and 6b, unfold the bag body 1, place the heat insulation sheet 3 flat on the surface of the bag body 1, the first heat insulation part 31 of the heat insulation sheet 3 is located at the rear baffle 11, the second heat insulation part 32 is located at the front baffle 12, and the first heat insulation part 31 and the rear baffle 11 are glued and fixed by the second adhesive piece 33.

[0045] S2, such as Figure 6 As shown in c, the partition 2 is placed on the surface of the first heat insulation part 31 with the wire harness 221 facing upward, and the partition 2 and the first heat insulation part 31 are glued and fixed by the first adhesive piece 25 so that a heat insulation cavity 17 is formed between the rear baffle 11 and the partition 2.

[0046] S3, such as Figure 6 As shown in d, the second heat insulation part 32 is flipped upward along the lower edge of the partition plate 2, and the second heat insulation part 32 is glued and fixed to the partition plate 2 on one side of the adhesive film 24 by the third adhesive piece 34.

[0047] S4, such as Figure 6 As shown in e, the front guard 12 is flipped upward along the fold line 19 so that the two side edges of the front guard 12 are close to the two side edges of the rear guard 11, and the front guard 12 and the rear guard 11 are sewn together by a sewing machine.

[0048] S5. Complete production.

[0049] Before manufacturing, the bag body 1 is equipped with a first magnet 14 and a second magnet 15, and also has a cross-shaped cut 16. During manufacturing, the heat insulation sheet 3 is glued and fixed to the bag body 1, and the partition 2 is glued and fixed to the heat insulation sheet 3, so that the partition 2 can be detached, which is convenient for replacing the partition 2.

[0050] like Figure 5 , Figures 7 to 11 As shown, the partition 2 is manufactured using a heat press machine, which includes a base 5. A worktable 51 and a support frame 52 are mounted on the upper part of the base 5. A heat-melting table 6 is installed inside the worktable 51. A lifting device 53, which is a cylinder, is mounted on the upper part of the support frame 52. A stamping mechanism 8 is fixed to the end of the telescopic rod of the lifting device 53. The stamping mechanism 8 is located above the heat-melting table 6 and can move up and down to or away from the upper surface of the heat-melting table 6. When it is necessary to manufacture... When making partition 2, the hot melt table 6 is heated first, and the adhesive film 24 is placed flat on the surface of the hot melt table 6. The hot melt table 6 heats the adhesive film 24. Then, the heating ring 22 and the heat insulation ring 23 are placed on the surface of the adhesive film 24. Then, the sheet body 21 is placed on the surface of the heating ring 22 and the heat insulation ring 23. Finally, the lifting device 53 drives the stamping mechanism 8 to descend, squeezing the sheet body 21 and the adhesive film 24. The hot melt table 6 then heat-melts and fixes the sheet body 21 and the adhesive film 24. The operation is convenient and the fixation is reliable.

[0051] The hot melt table 6 has multiple hot melt zones on its surface. Each hot melt zone includes a limiting groove 61, a positioning groove 62, and a clearance groove 63. The bottom of the limiting groove 61 can be heated, and the adhesive film 24 can be placed in the limiting groove 61 for positioning. The positioning groove 62 is located on the outer periphery of the limiting groove 61, and the internal size of the positioning groove 62 is consistent with that of the film 21, thereby enabling the placement of the film 21 for more precise processing. The clearance groove 63 is located on the surface of the hot melt table 6 and communicates with the limiting groove 61. When the heating ring 22 is placed on the surface of the adhesive film 24, the wire harness 221 of the heating ring 22 can be inserted into the clearance groove 63 to prevent the stamping mechanism 8 from squeezing the wire harness 221 during stamping.

[0052] The stamping mechanism 8 includes a pressure plate 82. The lower part of the pressure plate 82 is provided with a stamping block 81 corresponding to the hot-melt zone. The lower part of the stamping block 81 is provided with a boss 811 and an annular platform 812. The outer diameter of the boss 811 is smaller than the inner diameter of the heat insulation ring 23. The outer dimension of the annular platform 812 is smaller than the side wall dimension of the limiting groove 61. The inner diameter of the annular platform 812 is larger than the inner diameter of the heating ring 22. The annular platform 812 is provided with a notch 813 on one side of the clearance groove 63 to avoid the wire harness 221. When the stamping is hot-melt, the boss 811 can push the sheet 21 into the center of the heat insulation ring 23 so that the sheet 21 in this part is fused with the adhesive film 24 to form a groove 211 structure. The lower part of the annular platform 812 can abut and squeeze the sheet 21 and the adhesive film 24 so that the two are hot-melted and fixed.

[0053] The stamping mechanism 8 includes a push plate 83, which is fixed to the telescopic rod of the lifting device 53. A spring 84 is provided between the push plate 83 and the pressure plate 82. The push plate 83 and the pressure plate 82 are connected by a connecting rod. When the stamping block 81 abuts against the surface of the hot melt table 6, the push plate 83 can continue to descend and compress the spring 84, thereby playing a buffering role.

[0054] The workbench 51 is equipped with a flap 7 on its upper part. The flap 7 is hinged to the upper part of the workbench 51 via a hinge seat 511. The flap 7 has multiple clearance openings 71 corresponding to the hot-melt zone. The clearance openings 71 are larger than the size of the stamping block 81 and smaller than the size of the positioning groove 62. When the sheet 21 is placed in the hot-melt zone, the flap 7 rotates along the hinge seat 511 and abuts against the surface of the workbench 51. The flap 7 can press down on the sheet 21, thereby preventing the sheet 21 from shifting and improving the reliability of the hot-melt process. The flap 7 is also equipped with a handle 72 on one side, which facilitates the movement of the flap 7.

[0055] A bracket 54 is fixed to the outside of the support frame 52. An infrared instrument 100 corresponding to the hot melting zone is provided on the side of the bracket 54 facing the worktable 51. The infrared rays of the infrared instrument 100 are directly facing the center of the limiting groove 61. Through the above design, the positioning function of the heating ring 22 can be positioned, thereby improving the accuracy of the positioning ring 22.

[0056] The manufacturing process of partition 2 includes the following steps:

[0057] S1. Place the adhesive film 24 in the limiting groove 61 of the hot melt table 6 of the heat press machine, and heat the limiting groove 61.

[0058] S2. Place the heating ring 22 and the heat insulation ring 23 on the surface of the film 24, and embed the wire harness 221 of the heating ring 22 into the relief groove 63;

[0059] S3. Cover the heating ring 22 and the heat insulation ring 23 with the sheet 21. The sheet 21 is larger than the adhesive film 24. The edge of the sheet 21 is close to the edge of the positioning groove 62.

[0060] S4. Flip the flap 7 to cover the surface of the workbench 51;

[0061] S5, the lifting device 53 drives the stamping mechanism 8 to descend, the stamping block 81 squeezes the sheet 21 and the adhesive film 24, and heat-melts and fixes the sheet 21 and the adhesive film 24.

[0062] S6. Remove the partition 2 and attach the first adhesive sheet 25 to the side of the sheet 21 away from the adhesive film 24;

[0063] S7. Complete the production of partition 2.

[0064] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A stethoscope heating and heat preservation device, characterized in that, Includes a bag body (1), inside which is provided a partition (2), the inside of the bag body (1) is separated by the partition (2) to form a heat preservation cavity (17) and an installation cavity (18), the heat preservation cavity (17) can hold a stethoscope head (9), the installation cavity (18) is provided with a power supply (4), the partition (2) is provided with a heating ring (22), the heating ring (22) is connected to the power supply (4) through a wire harness (221), and the heating ring (22) can heat the stethoscope head (9); The partition (2) includes a sheet (21) and a film (24). One side of the sheet (21) is connected to the bag body (1) and the other side is heat-fused to the film (24). The heating ring (22) is located between the sheet (21) and the film (24). The stethoscope head (9) includes a metal sleeve (91) and a diaphragm (92). The heating ring (22) is provided with a heat insulation ring (23). The outer diameter of the heat insulation ring (23) is larger than the inner diameter of the metal sleeve (91) and smaller than the outer diameter of the metal sleeve (91). The inner diameter of the heating ring (22) is larger than the outer diameter of the diaphragm (92) and smaller than the outer diameter of the metal sleeve (91). The outer diameter of the heating ring (22) is larger than the outer diameter of the metal sleeve (91). The sheet (21) has a groove (211) on the side facing the heat insulation cavity (17). The groove (211) is located inside the heat insulation ring (23). The sheet (21) located in the groove (211) is heat-fused to the adhesive film (24). The film (92) is directly opposite the groove (211).

2. The stethoscope heating and heat preservation device according to claim 1, characterized in that, The bag body (1) includes an integrally formed rear baffle (11), front baffle (12) and flap (13). The flap (13) is located on the upper part of the rear baffle (11). The sheet (21) is fixed to the rear baffle (11). The heat insulation cavity (17) is located between the rear baffle (11) and the partition (2). The mounting cavity (18) is located between the front baffle (12) and the partition (2).

3. The stethoscope heating and heat preservation device according to claim 2, characterized in that, A first magnet (14) is fixed inside the flip cover (13), and a second magnet (15) is fixed outside the front cover (12). The first magnet (14) can attract the second magnet (15) so that the flip cover (13) covers the heat preservation cavity (17) and the mounting cavity (18). A cutout (16) is provided inside the flip cover (13).

4. The stethoscope heating and heat preservation device according to claim 3, characterized in that, The bag body (1) is provided with a heat insulation sheet (3), which is fixed to the inner side of the rear baffle (11) and the partition (2) on one side of the film (24).

5. A stethoscope heating and heat preservation device according to claim 4, characterized in that, The heat insulation sheet (3) includes a first heat insulation part (31) and a second heat insulation part (32). A second adhesive sheet (33) is provided on one side of the first heat insulation part (31), and a third adhesive sheet (34) is provided on the side of the second heat insulation part (32) away from the second adhesive sheet (33). The second adhesive sheet (33) is glued and fixed to the inside of the rear guard (11), and the third adhesive sheet (34) is glued and fixed to the partition (2) on one side of the film sheet (24).

6. The stethoscope heating and heat preservation device according to claim 5, characterized in that, The sheet (21) has a U-shaped first adhesive piece (25) on the side away from the adhesive film (24), and the first adhesive piece (25) is bonded and fixed to the first heat insulation part (31).

7. A manufacturing process for a stethoscope heating and heat preservation device, used to manufacture the stethoscope heating and heat preservation device as described in claim 6, characterized in that, Includes the following steps: S1. Unfold the bag body (1), place the heat insulation sheet (3) flat on the surface of the bag body (1), the first heat insulation part (31) of the heat insulation sheet (3) is located at the rear baffle (11), the second heat insulation part (32) is located at the front baffle (12), and fix the first heat insulation part (31) and the rear baffle (11) by the second adhesive piece (33); S2. Place the partition (2) on the surface of the first heat insulation part (31), with the wire harness (221) facing upwards, and fix the partition (2) and the first heat insulation part (31) by the first adhesive piece (25) so that a heat insulation cavity (17) is formed between the back panel (11) and the partition (2). S3. Flip the second heat insulation part (32) upward along the lower edge of the partition (2), and use the third adhesive piece (34) to attach and fix the second heat insulation part (32) and the partition (2) to one side of the adhesive film (24); S4. Flip the front guard (12) upward along the fold line (19) so that the two sides of the front guard (12) are close to the two sides of the rear guard (11), and sew the front guard (12) and the rear guard (11) together with a sewing machine. S5. Complete production.

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