Bag body for cold and warm compress bag, cold and warm compress water bag, electric warm water bag, cold compress ice bag, and high-frequency welding mold thereof

Abstract

The present invention relates to a bag body for a cold and warm compress bag, a cold and warm compress water bag, an electric warm water bag, a cold compress ice bag, and a high-frequency welding mold thereof. The bag body is generally U-shaped or C-shaped and comprises: an inner bag body part, located on the inner side of the bag body, wherein the outer surface of the inner bag body part is in an integral form; and an outer bag body part, located on the outer side of the bag body. The edges of the inner bag body part and outer bag body part are hermetically bound to form a bag body cavity between the inner bag body part and the outer bag body part. The cold and warm compress water bag comprises the above bag body and a lid. The electric warm water bag comprises the above bag body, an electric heating apparatus, and a socket. The cold compress ice bag comprises the above bag body and a phase-change material contained in the bag body. The present invention possesses the following beneficial effects: The inner-outer arrangement of the inner bag body part and the outer bag body part positions the bound edges away from the inner side of the bag body. The inner part of the bag body in fit with the body part for cold and warm compress is in an integral form, thus ensuring comfort in the cold and warm compress.

Description

Hot and cold compress bag body, hot and cold compress water bag, electric hot water bag, cold compress ice bag and high-frequency welding mold thereof Technical Field

[0001] The present invention relates to the technical field of hot and cold compress bags, in particular to a bag body of a hot and cold compress bag, a hot and cold compress water bag, an electric hot water bag, a cold compress ice bag and a high-frequency welding mould thereof. Background Art

[0002] Existing hot and cold compress bags include water bags, electric hot water bags, and cold compress bags filled with phase change material. Water bags have an inlet for injecting cold water, an ice-water mixture, or hot water for a hot or cold compress. Electric hot water bags have an electric heating device inside that heats the liquid inside for a hot compress. Cold compress bags filled with phase change material absorb heat from the phase change material inside the bag.

[0003] The bag body of the above-mentioned hot and cold compress bags is generally made of soft materials such as rubber, PVC and silicone. The bag body is generally formed by combining the edges of the bag body parts by welding or gluing, and forming a joint edge on the bag body.

[0004] Depending on the application of hot and cold compresses on different parts of the body, hot and cold compress bags are designed in various shapes. In order to apply cold or hot compresses to the neck, there is a U-shaped hot and cold compress water bag that can be hung around the neck in the prior art. This hot and cold compress water bag is also called a U-shaped hot water bag on the market. By injecting hot water into the hot water bag, you can hang it around the neck for hot compresses. You can also inject cold water or an ice water mixture into it and hang it around the neck for cold compresses to relieve discomfort after exercise.

[0005] This type of U-shaped hot and cold compress water bag has an inlet and a lid covering the inlet. The inlet has a cap seat that fits into the lid's threaded connection. The bag body of the U-shaped hot and cold compress water bag is generally made of a soft material, with PVC being the most popular material, while the cap seat and lid are made of a hard material.

[0006] The technical problem with the existing U-shaped hot and cold compress water bags is that the joining edge 11 on the bag body is located in the middle of the bag body, as shown in Figure 36, and exists on both the inside and outside of the bag body. When used around the neck, the inside of the bag body fits against the neck. Even after trimming, the joining edge 11 will still protrude slightly and have burrs, which will make the neck uncomfortable and affect the user experience.

[0007] The reason for this defect is that during the production process, the U-shaped hot and cold compress water bag must first be injection-molded into a complete bag body through an injection mold. This bag body includes an injection port in the middle of the bag body and U-shaped bag body parts 19 on both sides of the injection port. The cover seat in the injection port is pre-placed in the mold and combined with the injection port during injection molding. The left and right U-shaped bag body parts 19 of the bag body part are then assembled in a subsequent production step and pressed and welded along the edges using a high-frequency welding mold to form a complete U-shaped hot and cold compress water bag. This production process determines that the joining edge 11 on the inside and outside of the bag body is inevitable.

[0008] Existing conventional hot and cold compress water bags can also be seen in the process of forming the bag body by splicing two bag parts together and then welding them along the edges through high-frequency welding, which will also form a joint edge in the middle position of the bag body.

[0009] There is also a kind of cold compress ice pack used for hanging around the neck in the prior art, which is also generally called a neck hanging ice ring. The cold compress ice pack is also U-shaped, including a bag body and a phase change material filled in the bag body. The bag body of the cold compress ice pack is sealed, and the filled phase change material can absorb heat and become liquid after contacting the human body temperature, thereby achieving a cooling effect. The bag body of the cold compress ice pack is generally a TPU film or a PVC film. After two pieces of TPU film sheets or PVC film sheets are spliced ​​together, they are welded along the edges by high-frequency pressing to form a semi-finished bag body. In order to avoid the discomfort caused by the joining edge, the semi-finished bag body is turned outward so that the protruding joining edge is located inside the bag body. Finally, the phase change material is filled into the bag body through the reserved opening on the bag body, and the reserved opening is sealed to complete the production of the product. However, the method of turning the bag body outward is only applicable to film bags.

[0010] The disadvantage of this type of cold compress ice bag is that it is a product made of thin film. When it is injected with phase change material, the cross-section will naturally become round or close to a circle. The larger the capacity, the smaller the proportion of the contact area with the cold compress part, i.e. the skin of the neck, to the overall surface area, and the worse the cold compress experience. Therefore, the capacity of cold compress ice bags made of this type of film is relatively small, which affects the usage time. Summary of the Invention

[0011] The technical problem to be solved by the present invention is that the joining edge on the bag body of the U-shaped hot and cold compress bag is located in the middle of the bag body, and exists on both the inside and the outside. The joining edge will make the hot and cold compress area uncomfortable and affect the user experience.

[0012] The technical solution adopted by the present invention to solve its technical problems is: a bag body of a cold or hot compress bag, which is U-shaped or C-shaped as a whole, including: an inner bag body part, which is located on the inner side of the bag body, and the outer surface of the inner bag body part is in an integrated form; an outer bag body part, which is located on the outer side of the bag body, and the edge of the inner bag body part and the edge of the outer bag body part are sealed together to form an inner cavity of the bag body between the inner bag body part and the outer bag body part.

[0013] It is further defined that the inner bag body part and the outer bag body part are layered relative to the inside and outside of the bag body, and the edges of the inner bag body part and the edges of the outer bag body part both extend toward the outside of the bag body.

[0014] It is further defined that the inner bag body part is a single-layer structure or a multi-layer structure, the outer bag body part is a single-layer structure or a multi-layer structure, each layer of bag body parts is in an integrated form, each layer of bag body parts is layered relative to the inside and outside of the bag body, and the edges of each layer of bag body parts extend toward the outside of the bag body, and the edges of each layer of bag body parts are sealed together.

[0015] It is further defined that the connection part of the side arms on both sides of the bag body is the top of the bag body, the opening parts of the side arms on both sides of the bag body are the bottom of the bag body, and the surface of the bag body is divided into an inner side surface, an outer side surface, a front surface, a rear surface and end surfaces at both ends. The front surface is the surface located in front of the inner side surface and the outer side surface, the rear surface is the surface located behind the inner side surface and the outer side surface, and the end surfaces at both ends are the surfaces located at both ends of the inner side surface and the outer side surface. The outer bag body component constitutes the outer side surface of the bag body, and the edges of the inner bag body component and the outer bag body component are sealed together to form a joint edge that surrounds the outer side surface of the bag body. The inner bag body component constitutes the inner side surface, front surface, rear surface and end surfaces at both ends of the bag body.

[0016] It is further defined that the cross section of the inner bag part is U-shaped or C-shaped.

[0017] It is further defined that both the inner bag body part and the outer bag body part are single-layer structures, and the inner cavity of the bag body has at least one supporting structure for supporting the inner cavity of the bag body. The supporting structure is specifically a local recessed portion of the outer bag body part that is recessed toward the side of the inner bag body part. The top of the local recessed portion rests on the inner bag body part and is combined with the inner bag body part to form a whole, or only in contact and fit.

[0018] It is further defined that the local recessed portion is circular or elongated.

[0019] It is further defined that the material of the inner bag body part is rubber, PVC or silicone, and the material of the outer bag body part is rubber, PVC, hard plastic or silicone.

[0020] It is further defined that the inner bag body part is a double-layer structure with an internal hollow compartment, including an inner layer part and an outer layer part; the outer bag body part is a single-layer structure; the outer layer part, the inner layer part and the outer bag body part are all in an integrated form, and the outer layer part, the inner layer part and the outer bag body part are layered relative to the inside and outside of the bag body, and the edges of the outer layer part, the inner layer part and the outer bag body part are sealed together.

[0021] It is further defined that the inner hollow compartment of the inner bag body component has at least one supporting structure for supporting the inner hollow compartment, the supporting structure is located on the inner layer component and / or the outer layer component, and the supporting structure is specifically a supporting rib.

[0022] A hot or cold compress water bag comprises a bag body and a lid; the bag body is U-shaped or C-shaped as a whole, comprising an inner bag body part and an outer bag body part, the inner bag body part is located on the inner side of the bag body, the outer surface of the inner bag body part is in an integrated form, the outer bag body part is located on the outer side of the bag body, the edge of the inner bag body part and the edge of the outer bag body part are sealed together to form a bag body cavity between the inner bag body part and the outer bag body part; an injection port is provided on the inner bag body part or the outer bag body part, and the lid covers the injection port.

[0023] It is further defined that a cap seat is provided in the injection port for threaded engagement with the cap.

[0024] It is further defined that the injection port is located at the top of the bag body; or the injection port is located at the outer side of the bottom end of one side arm.

[0025] An electric hot water bag comprises a bag body, an electric heating device and a socket; the bag body is U-shaped or C-shaped as a whole, and comprises an inner bag body part and an outer bag body part, the inner bag body part is located on the inner side of the bag body, the outer surface of the inner bag body part is in an integrated form, the outer bag body part is located on the outer side of the bag body, the edge of the inner bag body part and the edge of the outer bag body part are sealed together to form a bag body cavity between the inner bag body part and the outer bag body part; a socket opening is provided on the inner bag body part or the outer bag body part, the socket is installed in the bag body through the socket opening, the socket is electrically connected to the electric heating device, and the electric heating device is distributed in the bag body cavity to heat the liquid filled in the bag body cavity.

[0026] A cold compress ice bag includes a bag body and phase change material. The bag body is U-shaped or C-shaped as a whole, including an inner bag body part and an outer bag body part. The inner bag body part is located on the inner side of the bag body, and the outer surface of the inner bag body part is in an integrated form. The outer bag body part is located on the outer side of the bag body. The edge of the inner bag body part and the edge of the outer bag body part are sealed together to form an inner cavity of the bag body between the inner bag body part and the outer bag body part; the phase change material is filled in the inner cavity of the bag body.

[0027] It is further defined that the bag body is a fully enclosed bag body.

[0028] A high-frequency welding mold is used to perform high-frequency welding on a bag body to be welded. After the bag body to be welded is subjected to high-frequency welding, the edge is trimmed as needed to obtain the bag body of the above-mentioned hot and cold compress bag. The bag body to be welded is assembled from the bag body parts of the hot and cold compress bag, or assembled from the semi-finished bag body parts of the bag body of the hot and cold compress bag; each semi-finished bag body part is a bag body part that continues to extend outward on the basis of the edge of each bag body part as a process reserved edge, including an upper mold, a middle mold and a lower mold arranged from top to bottom. The middle mold has a material cavity for accommodating the bag to be welded in a flat state. The inner side of the middle mold surrounding the material cavity is provided with a welding seat, which is used to allow the edges of the bag parts or semi-finished bag parts to be welded to be sleeved on the welding seat. The welding seat has a welding surface, and the upper mold and the lower mold also have welding surfaces. The welding surface on the upper mold is used to cooperate with the welding surface on the upper half of the welding seat, and the welding surface on the lower mold is used to cooperate with the welding surface on the lower half of the welding seat to weld the edges sandwiched between the welding surfaces.

[0029] A hot or cold compress bag is generally U-shaped or C-shaped, and includes a bag body, which includes: an inner bag part, which is located on the inner side of the bag body and has an outer surface that is in an integrated form; and an outer bag part, which is located on the outer side of the bag body and has an edge that is sealed together with an edge of the inner bag part to form an inner bag cavity between the inner bag part and the outer bag part.

[0030] It is further defined that the inner bag body part and the outer bag body part are layered relative to the inside and outside of the bag body, and the edges of the inner bag body part and the edges of the outer bag body part both extend toward the outside of the bag body.

[0031] It is further defined that the inner bag body part is a single-layer structure or a multi-layer structure, the outer bag body part is a single-layer structure or a multi-layer structure, each layer of bag body parts is in an integrated form, each layer of bag body parts is layered relative to the inside and outside of the bag body, and the edges of each layer of bag body parts extend toward the outside of the bag body, and the edges of each layer of bag body parts are sealed together.

[0032] It is further defined that the connection part of the side arms on both sides of the bag body is the top of the bag body, the opening parts of the side arms on both sides of the bag body are the bottom of the bag body, and the surface of the bag body is divided into an inner side surface, an outer side surface, a front surface, a rear surface and end surfaces at both ends. The front surface is the surface located in front of the inner side surface and the outer side surface, the rear surface is the surface located behind the inner side surface and the outer side surface, and the end surfaces at both ends are the surfaces located at both ends of the inner side surface and the outer side surface. The outer bag body component constitutes the outer side surface of the bag body, and the edges of the inner bag body component and the outer bag body component are sealed together to form a joint edge that surrounds the outer side surface of the bag body. The inner bag body component constitutes the inner side surface, front surface, rear surface and end surfaces at both ends of the bag body.

[0033] It is further defined that the cross section of the inner bag part is U-shaped or C-shaped.

[0034] It is further defined that both the inner bag body part and the outer bag body part are single-layer structures, and the inner cavity of the bag body has at least one supporting structure for supporting the inner cavity of the bag body. The supporting structure is specifically a local recessed portion of the outer bag body part that is recessed toward the side of the inner bag body part. The top of the local recessed portion rests on the inner bag body part and is combined with the inner bag body part to form a whole, or only in contact and fit.

[0035] It is further defined that the local recessed portion is circular or elongated.

[0036] It is further defined that the material of the inner bag body part is rubber, PVC or silicone, and the material of the outer bag body part is rubber, PVC, hard plastic or silicone.

[0037] It is further defined that the inner bag body part is a double-layer structure with an internal hollow compartment, including an inner layer part and an outer layer part; the outer bag body part is a single-layer structure; the outer layer part, the inner layer part and the outer bag body part are all in an integrated form, and the outer layer part, the inner layer part and the outer bag body part are layered relative to the inside and outside of the bag body, and the edges of the outer layer part, the inner layer part and the outer bag body part are sealed together.

[0038] It is further defined that the inner hollow compartment of the inner bag body component has at least one supporting structure for supporting the inner hollow compartment, the supporting structure is located on the inner layer component and / or the outer layer component, and the supporting structure is specifically a supporting rib.

[0039] It is further defined that there is a lid; the inner bag body part or the outer bag body part has an injection port, and the lid covers the injection port.

[0040] It is further defined that a cap seat is provided in the injection port for threaded engagement with the cap.

[0041] It is further defined that the injection port is located at the top of the bag body; or the injection port is located at the outer side of the bottom end of one side arm.

[0042] It is further defined that it also includes an electric heating device and a socket; there is a socket opening on the inner bag body part or the outer bag body part, the socket is installed in the bag body through the socket opening, the socket is electrically connected to the electric heating device, and the electric heating device is distributed in the inner cavity of the bag body for heating the liquid filled in the inner cavity of the bag body.

[0043] It is further defined that the bag further includes a phase change material, wherein the phase change material is filled in the inner cavity of the bag.

[0044] It is further defined that the bag body is a fully enclosed bag body.

[0045] The beneficial effects of the present invention are as follows: the bag body is formed by the inner bag body part and the outer bag body part arranged inside and outside, so that the joint edge is away from the inner side of the bag body, and the inner side of the bag body that fits the hot and cold compress part is in an integrated form, thereby ensuring the comfort of hot and cold compress;

[0046] Because the inner and outer sides of the bag are composed of different parts, the inner and outer bag parts can be of different colors, which increases the richness of the product appearance;

[0047] In addition, because the inner and outer sides of the bag body are composed of different parts, different materials can be used for the inner and outer bag body parts. The inner bag body parts are made of soft materials to ensure comfort. In addition to soft materials, the outer bag body parts can also use hard materials or soft materials with higher hardness. When hard materials or soft materials with higher hardness are used, the shape of the bag body can be made more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The present invention will be further described below with reference to the accompanying drawings and examples;

[0049] FIG1 is a schematic structural diagram of a hot or cold compress water bag according to Example 1 of the present invention from a three-dimensional perspective;

[0050] FIG2 is a schematic structural diagram of a hot or cold compress water bag according to Example 1 of the present invention from a front perspective;

[0051] FIG3 is a cross-sectional view taken along line AA of FIG2 ;

[0052] FIG4 is a schematic structural diagram of the upper mold of the present invention from a three-dimensional perspective;

[0053] FIG5 is a schematic structural diagram of the upper mold of the present invention when viewed from above;

[0054] FIG6 is a schematic structural diagram of the lower mold of the present invention from a three-dimensional perspective;

[0055] FIG7 is a schematic structural diagram of the middle mold of Example 1 of the present invention;

[0056] FIG8 is a schematic structural diagram of a semi-finished inner bag component of Example 1 of the present invention;

[0057] FIG9 is a schematic structural diagram of a semi-finished outer bag component of Example 1 of the present invention;

[0058] FIG10 is a schematic structural diagram of a bag to be welded according to Example 1 of the present invention;

[0059] FIG11 is a schematic structural diagram of a bag to be welded being sleeved on a welding seat of a middle mold according to Example 1 of the present invention;

[0060] FIG12 is a schematic diagram of the structure of the high-frequency welding mold of Example 1 of the present invention after the mold is closed, viewed from a top perspective;

[0061] FIG13 is a sectional view taken along line BB of FIG12 ;

[0062] FIG14 is an enlarged view of point C in FIG13;

[0063] FIG15 is a schematic structural diagram of the high-frequency welding mold of Example 1 of the present invention after mold closing from a front perspective;

[0064] FIG16 is a sectional view taken along line DD in FIG15 ;

[0065] FIG17 is an enlarged view of point E in FIG16 ;

[0066] FIG18 is a schematic structural diagram of a small-mouthed hot or cold compress water bag in a three-dimensional perspective according to Example 2 of the present invention;

[0067] FIG19 is a schematic structural diagram of a large-mouthed hot or cold compress water bag in a three-dimensional perspective according to Example 2 of the present invention;

[0068] FIG20 is a schematic structural diagram of a cold compress ice pack according to Example 3 of the present invention from a three-dimensional perspective;

[0069] 21 is a schematic structural diagram of the middle mold of the first high-frequency welding mold of Example 3 of the present invention;

[0070] 22 is a schematic structural diagram from a front perspective of the first high-frequency welding mold after mold closing according to Example 3 of the present invention;

[0071] FIG23 is a cross-sectional view taken along line GG of FIG22 ;

[0072] 24 is a schematic structural diagram of a second high-frequency welding die for sealing both ends of the bag according to Example 3 of the present invention;

[0073] FIG25 is a schematic structural diagram of a cold compress ice pack with an elongated partially recessed portion according to Example 4 of the present invention from a three-dimensional perspective;

[0074] FIG26 is a schematic structural diagram of a cold compress ice pack with an elongated partially recessed portion according to Example 4 of the present invention from a side view;

[0075] FIG27 is a sectional view taken along line FF of FIG26 ;

[0076] FIG28 is a schematic structural diagram of a cold compress ice pack with a circular partial depression according to Example 4 of the present invention;

[0077] FIG29 is a schematic structural diagram of a hot or cold compress water bag according to Example 5 of the present invention from a three-dimensional perspective;

[0078] FIG30 is a schematic structural diagram of a hot or cold compress water bag according to Example 5 of the present invention from a side perspective;

[0079] FIG31 is a cross-sectional view taken along line GG of FIG30 ;

[0080] FIG32 is an enlarged view of point H in FIG31;

[0081] 33 is a schematic structural diagram of the outer layer member of the inner bag member of Example 5 of the present invention;

[0082] 34 is a schematic structural diagram of the inner layer member of the inner bag member of Example 5 of the present invention;

[0083] FIG35 is a schematic structural diagram of a hot and cold compress water bag without an extended joint edge of the present invention;

[0084] FIG36 is a schematic structural diagram of an existing U-shaped hot and cold compress water bag;

[0085] In the figure, 1. Inner bag body component, 1-1. Inner layer component, 1-2. Outer layer component, 2. Outer bag body component, 2-1. Local recessed portion, 3. Lid, 4. Injection port, 5. Upper mold, 6. Middle mold, 6-1. Material cavity, 6-2. Welding seat, 7. Lower mold, 8. Bag to be welded, 8-1. Semi-finished product of inner bag body component, 8-2. Semi-finished product of outer bag body component, 9. Process reserved edge, 9-1. Positioning hole, 10. Lid seat, 11. Joint edge, 12. Side arm, 13. Positioning column, 14. Makeshift hole, 15. Welding surface, 16. Second upper mold, 17. Second lower mold, 18. Welding makeshift portion, 19. U-shaped bag body part, 20. Support ribs. DETAILED DESCRIPTION

[0086] Example 1

[0087] As shown in Figures 1 to 3, a hot and cold compress bag, also known as a hot and cold compress water bag, is used to hang around the neck and includes a bag body and a cover 3. The bag body has an injection port 4, and the cover 3 covers the injection port 4 to seal the injection port 4.

[0088] The bag body of the hot and cold compress water bag is generally U-shaped or C-shaped, and includes an inner bag body part 1, which is located on the inner side of the bag body. The outer surface of the inner bag body part 1 is in an integral form, and is used to provide an integral hot and cold compress surface on the inner side of the bag body; and an outer bag body part 2, which is located on the outer side of the bag body. The edges of the inner bag body part 1 and the outer bag body part 2 are sealed together to form a bag body cavity between the inner bag body part 1 and the outer bag body part 2. The edges of the inner bag body part 1 and the outer bag body part 2 are sealed together to form a joint edge 11.

[0089] In this embodiment 1, specifically, the inner bag part 1 and the outer bag part 2 are both single-layer structures, and the inner bag part 1 and the outer bag part 2 are both in an integral form, so an integral outer surface can be provided on both the inside and outside of the bag body.

[0090] The inner bag portion 1 and the outer bag portion 2 are arranged in layers relative to the inner and outer sides of the bag body, and the edges of the inner bag portion 1 and the outer bag portion 2 extend toward the outside of the bag body, so that the edges of the inner bag portion 1 and the outer bag portion 2 are sealed together by the edge of the inner bag portion 1 being sleeved outside the edge of the outer bag portion 2, forming a joint edge 11. The outer surface of the inner bag portion 1 extends from the inner side of the bag body to the outer side, forming the cold and hot compress neck hot and cold compress surface of the bag body, and the outer bag portion is located away from the outside of the neck, so that the joint edge is as far away as possible from the hot and cold compress area, i.e., the human body.

[0091] The hot and cold compress bags of the present invention, including the hot and cold compress water bag of the present embodiment 1, can be used for hot and cold compresses on the neck as well as on the limbs of the human body. Of course, hot and cold compress bags specifically for hot and cold compresses on specific parts of the body can also be developed. Without changing the overall shape of the hot and cold compress bag of the present invention, the outer contour and size of the hot and cold compress bag can be adaptively adjusted to suit specific parts of the human body, which also falls within the scope of protection of the present invention.

[0092] In this embodiment 1, the connection part of the side arms 12 on both sides of the bag body is the top of the bag body, and the opening part of the side arms 12 on both sides is the bottom of the bag body. The surface of the bag body is divided into an inner side surface, an outer side surface, a front surface, a rear surface and end surfaces at both ends. The front surface is the surface located in front of the inner side surface and the outer side surface, the rear surface is the surface located behind the inner side surface and the outer side surface, and the end surfaces at both ends are the surfaces located at both ends of the inner side surface and the outer side surface. The outer bag body component 2 constitutes the outer side surface of the bag body, the bonding edge 11 surrounds the four sides of the outer side surface of the bag body, and the inner bag body component 1 constitutes the inner side surface, front surface, rear surface and end surfaces at both ends of the bag body.

[0093] As shown in FIG3 , the cross section of the inner bag component 1 is specifically U-shaped or C-shaped.

[0094] The injection port 4 is located at the outer side of the bottom end of the side arm 12, and the injection port 4 has a cover seat 10 for threaded engagement with the lid 3, as shown in Figure 9. Because the outer bag body part 2 constitutes the outer side of the bag body, the injection port 4 is also located at the end of the outer bag body part 2.

[0095] The hot and cold compress water bag of this embodiment 1 can be injected with hot water through the injection port 4 for hot compress, so it is also called a hot water bag. It can also be injected with ice water through the injection port 4 for cold compress. By expanding the outer contour of the end of the side arm 12 and its vicinity, the shape of the hot and cold compress water bag is made similar to a headset. The outer side surface of the bottom end of the side arm 12 can be designed with a large injection port 4 to facilitate the injection of ice water containing ice. Because the bottom end of the side arm 12 is located in the front of the neck, the shape of the hot and cold compress water bag similar to the appearance of a headset will not affect the user experience.

[0096] Because the inner and outer sides of the bag body are composed of two parts, the inner bag body part 1 and the outer bag body part 2 can be made of different materials. The inner bag body part 1 uses soft materials to ensure comfort. In addition to soft materials, the outer bag body part 2 can also use hard materials or soft materials with higher hardness. When hard materials or soft materials with higher hardness are used, the shape of the bag body can be more stable.

[0097] In this embodiment 1, the materials of the inner bag part 1 and the outer bag part 2 are both PVC. The material of the inner bag part 1 can also be rubber or silicone, and the material of the outer bag part 2 can also be rubber, hard plastic or silicone.

[0098] PVC is a soft material, and the lid 3 is a hard material. Therefore, in order to reliably seal the injection port 4, a hard material cover seat 10 is required inside the injection port 4. However, when the injection port is located on the outer bag member 2, which can be made of hard plastic, the additional cover seat 10 is not necessary. An internal thread structure that mates with the thread of the lid 3 can be directly formed in the injection port 4, and the injection port 4 is reliably sealed after the lid 3 is tightened.

[0099] The edges of the inner bag body part 1 and the outer bag body part 2 can be combined together by welding or gluing. In addition to high-frequency welding, welding also includes other welding methods, such as hot press welding. The edges of the inner bag body part 1 and the edges of the outer bag body part 2 are both designed to face the outside of the bag body, so that the connecting edge 11 also protrudes toward the outside of the bag body. Even if the width of the protruding connecting edge 11 is larger as in the present embodiment 1, it will not cause discomfort to the neck. At the same time, the inner bag body part 1 and the outer bag body part 2 are arranged in layers relative to the inside and outside of the bag body, and the extension direction of the edges of the inner bag body part 1 and the outer bag body part 2 are consistent, and the design of both facing the outside of the bag body is also more conducive to the subsequent high-frequency welding through the high-frequency welding mold of this embodiment 1.

[0100] The colors of the inner bag body part 1 and the outer bag body part 2 can be the same or different, which increases the richness of the product appearance.

[0101] As shown in Figures 4 to 17, a high-frequency welding mold is used to perform high-frequency welding on a bag body 8 to be welded. After high-frequency welding, the bag body 8 to be welded is trimmed as needed to obtain the bag body of the hot and cold compress bag of this embodiment 1. The bag body 8 to be welded is assembled from the bag body components of the hot and cold compress bag, or assembled from the semi-finished bag body components of the bag body of the hot and cold compress bag; each semi-finished bag body component is a bag body component that continues to extend outward from the edge of each bag body component to form a process reserved edge 9. The high-frequency welding mold includes an upper mold 5, a middle mold 6, and a lower mold 7 arranged from top to bottom. The middle mold 6 has a material cavity 6-1 therein for accommodating the bag body 8 to be welded in a flat state. As shown in Figures 7 and 11, the inner side of the middle mold 6 surrounding the material cavity 6-1 is provided with a welding seat 6-2, which is used to allow the edges of each bag body component or each bag body component semi-finished product to be welded to the bag body 8 to be sleeved on the welding seat 6-2. The welding seat 6-2 has a welding surface 15, and the upper mold 5 and the lower mold 7 also have welding surfaces 15. The welding surface 15 on the upper mold 5 is used to cooperate with the welding surface 15 on the upper half of the welding seat 6-2, and the welding surface 15 on the lower mold 7 is used to cooperate with the welding surface 15 on the lower half of the welding seat 6-2 to weld the edges sandwiched between the welding surfaces 15. In this embodiment 1, all edges around the inner bag body component 1 and the outer bag body component 2 are edges to be welded, and are all sandwiched between the welding surfaces 15 for welding.

[0102] The bag body 8 to be welded is subjected to high-frequency welding by the above-mentioned high-frequency welding mold to achieve the combination of the edges of the bag body components. After trimming as needed, the bag body of the hot and cold compress bag of this embodiment 1 can be obtained as a finished product.

[0103] The bag body 8 to be welded can be specifically assembled from the inner bag body part 1 and the outer bag body part 2 inside and outside, and the bag body that can be used as a finished product of the hot and cold compress bag can be directly obtained after high-frequency welding, or as shown in 8 to 11, it can be assembled from the inner bag body part semi-finished product 8-1 and the outer bag body part semi-finished product 8-2 inside and outside, and the inner bag body part semi-finished product 8-1 and the outer bag body part semi-finished product 8-2 are bag parts that extend outward from the inner bag body part 1 and the outer bag body part 2 to form a process reserved edge 9. As shown in Figures 8 and 9, the edge outside the dotted line is the process reserved edge 9. The bag body 8 to be welded, which is assembled from the inner bag body part semi-finished product 8-1 and the outer bag body part semi-finished product 8-2 inside and outside, is trimmed after high-frequency welding, and the bag body that can be used as a finished product is obtained after trimming.

[0104] As shown in Figures 13, 14, 16 and 17, the welding surface 15 on the upper mold 5 is used to cooperate with the welding surface 15 on the upper half of the welding seat 6-2, and the welding surface 15 on the lower mold 7 is used to cooperate with the welding surface 15 on the lower half of the welding seat 6-2 to weld the edges sandwiched between the welding surfaces 15.

[0105] Specifically, the upper mold 5 and the lower mold 7 are connected to one pole of the high-frequency welding equipment, and the middle mold 6 is connected to the other pole of the high-frequency welding equipment.

[0106] The main function of the process reserved edge 9 is: there is a possibility of misalignment when the bag parts are assembled and welded, and the process reserved edge 9 can be used as a margin. After the welding is completed, the excess process reserved edge 9 can be cut off by trimming to ensure that the joining edge 11 is flush; in addition, the process reserved edge 9 allows the edge to be welded to have sufficient width to ensure the welding quality; and the positioning structure on the process reserved edge 9 can be used to position the semi-finished bag parts during welding to minimize misalignment.

[0107] As shown in Figures 8 and 9, in the present invention, the positioning structure on the process reserved edge 9 is specifically a positioning hole 9-1 on the process reserved edge 9. As shown in Figure 11, the outer bag component semi-finished product 8-2 and the inner bag component semi-finished product 8-1 are welded and positioned by positioning posts 13 that pass through the positioning holes 9-1 and are inserted into the middle mold 6. Correspondingly, as shown in Figures 4, 5, and 6, the upper mold 5 and the lower mold 7 have clearance holes 14 for the positioning posts 13.

[0108] Of course, other positioning structures or methods can be used for welding positioning. For example, instead of designing the positioning holes 9-1 on the process reserved edge 9, the positioning holes 9-1 and the positioning posts 13 can be replaced by the friction between the edges of the bag 8 to be welded, which is tightly fitted on the welding seat 6-2 of the middle mold 6, and the welding seat 6-2, and the friction between the edges to be welded. Accordingly, the positioning posts 13 inserted in the middle mold 6 and the clearance holes 14 in the upper mold 5 and the lower mold 7 are no longer needed.

[0109] The following describes the production method of the hot and cold compress bag of the first embodiment by taking the example of combining the edges of the inner bag body part 1 and the outer bag body part 2 by high-frequency welding.

[0110] A method for producing a bag body for a hot or cold compress bag comprises: first, using an injection mold to inject an inner bag body semi-finished product 8-1 and an outer bag body semi-finished product 8-2; then, the outer bag body semi-finished product 8-2 and the inner bag body semi-finished product 8-1 are successively placed into the above-mentioned high-frequency welding mold of this embodiment 1 to assemble the bag body 8 to be welded and then perform high-frequency welding; then, trimming is performed to remove excess process reserved edges 9.

[0111] More specifically, the inner bag body component semi-finished product 8-1 and the outer bag body component semi-finished product 8-2 are bag body components that extend outward on the basis of the inner bag body component 1 and the outer bag body component 2 to form a process reserved edge 9. The process reserved edge 9 has a positioning hole 9-1. The outer bag body component semi-finished product 8-2 and the inner bag body component semi-finished product 8-1 are welded and positioned by passing through the positioning hole 9-1 and inserting the positioning column 13 on the middle mold 6.

[0112] When the outer bag body semi-finished product 8-2 is injection molded, the cover seat 10 in the injection port 4 is pre-placed in the injection mold and is integrated with the injection port 4 during the injection molding of the outer bag body semi-finished product 8-2. When the outer bag body semi-finished product 8-2 is made of hard plastic, the cover seat 10 is no longer required in the injection port 4, and the threaded injection port 4 can be directly injection molded using the injection mold.

[0113] Example 2

[0114] As shown in Figures 18 and 19, a hot and cold compress bag, also called a hot and cold compress water bag, is basically the same as the hot and cold compress bag of Example 1, with the difference that the injection port 4 is located at the top of the bag body, and the top of the bag body is on the outer side of the bag body, so the injection port 4 is also located in the middle position of the outer bag body part 2 that constitutes the outer side of the bag body.

[0115] The hot and cold compress water bag of the present embodiment 2 can also be filled with hot water for hot compress or ice water for cold compress. Compared with the embodiment 1, the injection port 4 is arranged at the top of the bag body to prevent hot water from splashing out when filling water.

[0116] The injection port 4 of the hot and cold compress water bag shown in Figure 18 is a small opening, and the diameter of the cover 3 is also small. Because the diameter of the injection port 4 is small, no protrusions will be formed on the front and rear surfaces of the hot and cold compress water bag. However, the small injection port 4 is not convenient for injecting ice water containing ice.

[0117] Therefore, this embodiment 2 is also designed with a large-mouthed hot and cold compress water bag, as shown in Figure 19. The injection port 4 is large and the diameter of the cover 3 is also large, which is convenient for injecting ice water containing ice. However, due to the large diameter of the injection port 4, protrusions will be formed on the front and rear surfaces of the hot and cold compress water bag.

[0118] Example 3

[0119] As shown in FIG20 , a hot or cold compress bag, also known as an ice pack, is essentially the same as the hot or cold compress water bag of Example 1, differing in that the inner cavity of the bag is filled with a phase change material. Because the phase change material in the ice pack can be reused, it generally does not require the user to refill or replace it. Therefore, the ice pack of Example 3 does not require the inlet 4 and lid 3 of Example 1, which facilitate user-injection of liquids. That is, the bag is a fully enclosed bag without the inlet 4.

[0120] Of course, it is not ruled out that the hot and cold compress water bags in Examples 1 and 2 can be directly filled with phase change materials to form cold compress ice bags.

[0121] The bag body in Example 2 can be welded in one-time high-frequency welding using a high-frequency welding mold of the same design as that of Example 1, and the bag body can be produced using the same production method for hot and cold compress bags as that of Example 1.

[0122] However, the bag body of this embodiment 3 is not provided with any injection port 4 or filling hole. In order to fill the phase change material in the bag body before leaving the factory, the bag body of this embodiment 3 chooses to adopt two high-frequency welding methods for bag body production. In the first high-frequency welding, a section of the edge of the bag body 8 to be welded is left unwelded, making it a filling port for filling the phase change material. After the filling is completed, another high-frequency welding process is performed to seal the filling port.

[0123] Preferably, during the first high-frequency welding, the edge that is left unwelded is the edge at the bottom of the end area of ​​the side arm 12. More preferably, the edges at the bottom of the end areas of the side arms 12 on both sides are left unwelded, forming an opening at both ends of the bag body, one of which can be used as a filling port and the other as a vent.

[0124] As shown in Figures 21 to 23, the first high-frequency welding mold used for the first high-frequency welding of the bag body of this embodiment 3 is basically the same as the high-frequency welding mold of Example 1, with the difference that the welding surface 15 corresponding to the non-welded edges on the welding seat 6-2 of the middle mold 6 is omitted, so that these edges can be non-welded during the first high-frequency welding.

[0125] Of course, the welding surfaces 15 corresponding to the non-welded edges on the upper mold 5 and the lower mold 7 can also be omitted to achieve non-welding of these edges during the first high-frequency welding.

[0126] As shown in Figures 21 and 23, in this embodiment 3, a portion of both ends of the welding seat 6-2 of the middle mold 6 is removed inward to form a welding clearance portion 18, so that the end of the welding seat 6-2 does not have the welding surface 15 required for welding, and a section of the edge of the end area of ​​the side arms 12 on both sides is left unwelded.

[0127] As shown in Figure 24, the structure of the second high-frequency welding mold used for the second high-frequency welding in this embodiment 3 only requires a second upper mold 16 and a second lower mold 17. The welding surfaces 15 on the second upper mold 16 and the second lower mold 17 are consistent with the curvature of the un-welded edge. The second high-frequency welding mold is used to weld the openings at both ends of the bag body twice to achieve sealing.

[0128] The production method of the cold compress ice bag of this embodiment 3 is as follows: first, the inner bag body component semi-finished product 8-1 and the outer bag body component semi-finished product 8-2 are injection molded through an injection mold; then the inner bag body component semi-finished product 8-1 and the outer bag body component semi-finished product 8-2 are placed in the first high-frequency welding mold used in this embodiment 3 for the first high-frequency welding, combining most of the edges of the inner bag body component 1 and the outer bag body component 2 together, leaving only two openings at the two ends of the bag body; filling the phase change material through one of the filling ports; after the phase change material is filled, the openings at both ends of the bag body are welded twice through the second high-frequency welding mold of this embodiment 3 to achieve sealing; then, trimming is performed to remove the excess process reserved edge 9 to obtain the cold compress ice bag of this embodiment 3.

[0129] Example 4

[0130] As shown in Figures 25 to 28, a hot and cold compress bag, also known as a cold compress ice bag, is basically the same as the cold compress ice bag of Example 3, with the difference that: the bag body cavity formed by the inner bag body part 1 and the outer bag body part 2 also has at least one supporting structure for supporting the bag body cavity, and the supporting structure is specifically a local recessed portion 2-1 of the outer bag body part 2 that is recessed toward the side of the inner bag body part 1, and the top of the local recessed portion 2-1 is against the inner bag body part 1. Preferably, the top of the local recessed portion 2-1 is combined with the inner bag body part 1 to form a whole. Of course, it is not ruled out that it plays a supporting role through contact cooperation.

[0131] The local recessed portions 2-1 are circular or strip-shaped and are evenly distributed on the outer bag body 2 or only arranged at locations that are easily deformed.

[0132] As shown in Figures 25, 26, and 27, the outer bag portion 2 of the bag body has two elongated localized recesses 2-1. The elongated localized recesses 2-1 extend along the length of the outer bag portion 2. As shown in Figure 28, the side arms 12 on both sides of the outer bag portion 2 of the bag body have two circular localized recesses 2-1, for a total of four circular localized recesses 2-1.

[0133] The top of the local recessed portion 2 - 1 on the outer bag body part 2 and the inner bag body part 1 can be combined together specifically by high-frequency welding.

[0134] Example 5

[0135] As shown in Figures 29 to 34, a hot and cold compress bag, also known as a hot and cold compress water bag, is substantially the same as the hot and cold compress water bag of Example 2, except that the inner bag portion 1 is a double-layer structure with an internal hollow compartment, comprising an inner layer portion 1-1 and an outer layer portion 1-2, while the outer bag portion 2 is a single-layer structure. The outer layer portion 1-2, the inner layer portion 1-1, and the outer bag portion 2 are all integrally formed. The outer layer portion 1-2, the inner layer portion 1-1, and the outer bag portion 2 are arranged in layers relative to the inner and outer sides of the bag body. The edges of the outer layer portion 1-2, the inner layer portion 1-1, and the outer bag portion 2 extend in the same direction, all toward the outside of the bag body, and the edges of the outer layer portion 1-2, the inner layer portion 1-1, and the outer bag portion are sealed together. The internal hollow compartment utilizes the poor thermal conductivity of air to prevent overheating or overcooling during hot or cold compresses.

[0136] The inner hollow compartment of the inner bag body component 1 has at least one supporting structure for supporting the inner hollow compartment. The specific number is reasonably selected based on the support requirements and the specific structure of the supporting structure. The supporting structure is located on the inner layer component 1-1, and the supporting structure is specifically a supporting rib 20.

[0137] The supporting structure may also be provided on the outer layer component 1 - 2 , and of course may also be provided on both the inner layer component 1 - 1 and the outer layer component 1 - 2 .

[0138] The bag body in this embodiment 5 can also use the high-frequency welding mold of embodiment 1 to perform high-frequency welding of the bag body.

[0139] A production method for the bag body of the hot and cold compress bag of this embodiment 5 is: first, the inner layer component semi-finished product, the outer layer component semi-finished product and the outer layer component semi-finished product 8-2 of the inner bag body component 1 are injection molded through an injection mold; then the outer layer component semi-finished product 8-2, the outer layer component semi-finished product and the inner layer component semi-finished product of the inner bag body component 1 are placed in the high-frequency welding mold of the above-mentioned hot and cold compress bag of this embodiment 1 in turn, and they are assembled into the bag body 8 to be welded and then high-frequency welding is performed; then, the edges are trimmed to remove the excess process reserved edges 9.

[0140] The inner layer component semi-finished product and the outer layer component semi-finished product of the inner bag body component 1 are bag body components with a portion extending outward as a process reserved edge 9 based on the inner layer component 1-1 and the outer layer component 1-2 of the inner bag body component 1. Positioning holes 9-1 can also be set on the process reserved edge 9 as needed for welding positioning.

[0141] The joint edge 11 of the bag body of the hot and cold compress bags in the above-mentioned embodiments 1 to 5 protrudes a large width. In fact, when trimming the edges, the above-mentioned embodiments 1 to 5 can also cut off as much of the joint edge as possible on the basis of ensuring the sealing reliability of the joint edge 11, so as to form a joint edge 11 that does not protrude from the bag body as much as possible, as shown in Figure 35.

[0142] The bag body of the hot and cold compress bag in the above-mentioned embodiments 1 to 5 can also be used as the bag body of an electric hot water bag. The electric hot water bag is basically the same as the hot and cold compress water bag in embodiment 1, with the difference that: in addition to the bag body, it also includes an electric heating device and a socket. The inner bag body part 1 or the outer bag body part 2 of the bag body has a socket opening, and the socket is installed in the bag body through the socket opening. The socket is electrically connected to the electric heating device. The electric heating device is distributed in the bag body and is used to heat the liquid filled in the bag body.

[0143] Because the liquid filled in the bag body of the electric hot water bag generally does not need to be filled or replaced by the user, the electric hot water bag does not need to be provided with the injection port 4 and the cover 3 in Example 1 for users to inject liquid by themselves. Instead, the liquid in the bag body of the electric hot water bag is filled in the factory through a hidden filling hole provided on the socket.

[0144] The hot and cold compress water bag, electric hot water bag and cold compress ice bag in the present invention all belong to hot and cold compress bags.

Claims

1. A bag body of a hot or cold compress bag, characterized by: The overall shape is U or C, including: An inner bag body component (1), the inner bag body component (1) is located inside the bag body, and the outer surface of the inner bag body component (1) is in an integrated form; An outer bag body part (2) is located outside the bag body, and the edge of the inner bag body part (1) and the edge of the outer bag body part (2) are sealed together to form a bag body inner cavity between the inner bag body part (1) and the outer bag body part (2).

2. The bag body of the hot and cold compress bag according to claim 1, characterized in that: The inner bag body part (1) and the outer bag body part (2) are arranged in layers relative to the inner and outer sides of the bag body, and the edges of the inner bag body part (1) and the edges of the outer bag body part (2) both extend toward the outside of the bag body.

3. The bag body of the hot or cold compress bag according to claim 1, characterized in that: The inner bag body part (1) is a single-layer structure or a multi-layer structure, and the outer bag body part (2) is a single-layer structure or a multi-layer structure. Each layer of bag body parts is in an integrated form, and each layer of bag body parts is arranged in layers relative to the inside and outside of the bag body, and the edges of each layer of bag body parts extend toward the outside of the bag body, and the edges of each layer of bag body parts are sealed together.

4. The bag body of the hot or cold compress bag according to claim 1, characterized in that: The connection part of the side arms (12) on both sides of the bag body is the upper part of the bag body, and the opening part of the side arms (12) on both sides of the bag body is the lower part of the bag body. The surface of the bag body is divided into an inner side surface, an outer side surface, a front surface, a rear surface and end surfaces at both ends. The front surface is the surface located in front of the inner side surface and the outer side surface, the rear surface is the surface located behind the inner side surface and the outer side surface, and the end surfaces at both ends are the surfaces located at both ends of the inner side surface and the outer side surface. The outer bag body component (2) constitutes the outer side surface of the bag body. The edges of the inner bag body component (1) and the outer bag body component (2) are sealed together to form a joint edge (11) surrounding the outer side surface of the bag body. The inner bag body component (1) constitutes the inner side surface, front surface, rear surface and end surfaces at both ends of the bag body.

5. The bag body of the hot or cold compress bag according to claim 4, characterized in that: The cross section of the inner bag body component (1) is U-shaped or C-shaped.

6. The bag body of the hot or cold compress bag according to claim 1, characterized in that: The inner bag body part (1) and the outer bag body part (2) are both single-layer structures, and the inner cavity of the bag body has at least one supporting structure for supporting the inner cavity of the bag body, and the supporting structure is specifically a local recessed portion (2-1) of the outer bag body part (2) that is recessed toward the side of the inner bag body part (1), and the top of the local recessed portion (2-1) is against the inner bag body part (1) and is combined with the inner bag body part (1) to form a whole, or only in contact with each other.

7. The bag body of the hot or cold compress bag according to claim 6, characterized in that: The local recessed portion (2-1) is circular or elongated.

8. The bag body of the hot or cold compress bag according to claim 1, characterized in that: The material of the inner bag body part (1) is rubber, PVC or silicone, and the material of the outer bag body part (2) is rubber, PVC, hard plastic or silicone.

9. The bag body of the hot or cold compress bag according to claim 1, characterized in that: The inner bag body component (1) is a double-layer structure with an internal hollow compartment, comprising an inner layer component (1-1) and an outer layer component (1-2); The outer bag body component (2) is a single-layer structure; The outer layer component (1-2), the inner layer component (1-1) and the outer bag body component (2) are all in an integrated form, and the outer layer component (1-2), the inner layer component (1-1) and the outer bag body component (2) are arranged in layers relative to the inside and outside of the bag body, and the edges of the outer layer component (1-2), the inner layer component (1-1) and the outer bag body component (2) are sealed together.

10. The bag body of the hot or cold compress bag according to claim 9, characterized in that: The inner hollow compartment of the inner bag body component (1) has at least one supporting structure for supporting the inner hollow compartment. The supporting structure is located on the inner layer component (1-1) and / or the outer layer component (1-2). The supporting structure is specifically a supporting rib (20).

11. A hot and cold compress water bag, characterized by: It includes a bag body and a cover (3); The bag body is in a U-shape or a C-shape as a whole, and comprises an inner bag body part (1) and an outer bag body part (2); the inner bag body part (1) is located on the inner side of the bag body, and the outer surface of the inner bag body part (1) is in an integrated form; the outer bag body part (2) is located on the outer side of the bag body; the edge of the inner bag body part (1) and the edge of the outer bag body part (2) are sealed together to form an inner bag body cavity between the inner bag body part (1) and the outer bag body part (2); The inner bag body part (1) or the outer bag body part (2) has an injection port (4), and the cover (3) covers the injection port (4).

12. The hot and cold compress water bag according to claim 11, characterized in that: The injection port (4) is provided with a cover seat (10) for threaded engagement with the cover (3).

13. The hot and cold compress water bag according to claim 11, characterized in that: The injection port (4) is located at the top of the bag body; or the injection port (4) is located at the outer side surface of the bottom end of one side arm (12).

14. An electric hot water bag, characterized by: It includes a bag body, an electric heating device and a socket; The bag body is in a U-shape or C-shape as a whole, and comprises an inner bag body part (1) and an outer bag body part (2); the inner bag body part (1) is located on the inner side of the bag body, and the outer surface of the inner bag body part (1) is in an integrated form; the outer bag body part (2) is located on the outer side of the bag body; the edge of the inner bag body part (1) and the edge of the outer bag body part (2) are sealed together to form an inner bag body cavity between the inner bag body part (1) and the outer bag body part (2); The inner bag body part (1) or the outer bag body part (2) has a socket opening, the socket is installed in the bag body through the socket opening, the socket is electrically connected to the electric heating device, and the electric heating device is distributed in the bag body cavity and is used to heat the liquid filled in the bag body cavity.

15. A cold compress ice pack, characterized by: Including bag body and phase change material, The bag body is in a U-shape or C-shape as a whole, and comprises an inner bag body part (1) and an outer bag body part (2); the inner bag body part (1) is located on the inner side of the bag body, and the outer surface of the inner bag body part (1) is in an integrated form; the outer bag body part (2) is located on the outer side of the bag body; the edge of the inner bag body part (1) and the edge of the outer bag body part (2) are sealed together to form an inner bag body cavity between the inner bag body part (1) and the outer bag body part (2); The phase change material is filled in the inner cavity of the bag.

16. The cold compress ice pack according to claim 15, characterized in that: The bag body is a fully enclosed bag body.

17. A high frequency welding die, characterized in that: The bag body (8) to be welded is subjected to high-frequency welding, and the bag body (8) to be welded is trimmed as needed after high-frequency welding to obtain the bag body of the hot and cold compress bag according to claim 1. The bag body (8) to be welded is assembled from the bag body parts of the hot and cold compress bag, or assembled from the semi-finished bag body parts of the hot and cold compress bag; each semi-finished bag body part is a bag body part that continues to extend outward from the edge of each bag body part as a process reserved edge (9), The invention comprises an upper mold (5), a middle mold (6) and a lower mold (7) arranged from top to bottom, wherein the middle mold (6) has a material cavity (6-1) for accommodating a bag body (8) to be welded in a flat state, and the inner side of the middle mold (6) surrounding the material cavity (6-1) has a welding seat (6-2) for allowing the edges of each bag body component or each bag body component semi-finished product of the bag body (8) to be welded to be sleeved on the welding seat (6-2), and the welding seat (6-2) The upper mold (5) and the lower mold (7) also have welding surfaces (15). The welding surface (15) on the upper mold (5) is used to cooperate with the welding surface (15) on the upper half of the welding seat (6-2), and the welding surface (15) on the lower mold (7) is used to cooperate with the welding surface (15) on the lower half of the welding seat (6-2) to weld the edges sandwiched between the welding surfaces (15).

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