Sealing machine

Abstract

A sealing machine, relating to the field of household appliances, and comprising a machine body, a cover body, and a heating wire assembly. The machine body is provided with the heating wire assembly. and is provided with a shielding part used for preventing mistakenly touching the heating wire assembly; and the cover body is provided with sealing silica gel matching the heating wire assembly. According to the present utility model, the shielding part used for preventing mistakenly touching the heating wire assembly is provided on the surface of the machine body, so that the embedded design of the heating wire assembly is ingeniously realized, solving the problem of potential safety hazards caused by exposing the heating wire assembly on the surface of the machine body. The shielding part can be designed into a recessed structure or a raised structure according to actual requirements, the design is flexible, the plasticity is high, and diversified requirements of different machine types, different application scenarios or different use objects can be met.

Description

A sealing machine Technical Field

[0001] The utility model relates to the field of household appliances, in particular to a sealing machine. Background Art

[0002] The vacuum sealing machine uses a vacuuming component to vacuum the vacuum packaging bag, and then uses a heat sealing component to heat-seal the bag opening of the vacuum packaging bag to prevent the food in the vacuum packaging bag from oxidizing or deteriorating due to contact with air. It can effectively inhibit the growth of various bacteria and molds, thereby extending the shelf life.

[0003] Patent publication number CN217554278U discloses a heating wire assembly for a vacuum sealer, comprising a support frame, a metal heating wire, and an insulating rod. The support frame has a mounting slot along its length, within which the insulating rod is secured. The insulating rod is helically wound with the heating wire. Helically wrapping the heating wire around the insulating rod not only maintains the wire's length at 1.5 meters, thereby ensuring it meets the required resistance value, but also addresses the issue of insufficient mounting space for the heating wire due to the reduced size of the vacuum sealer.

[0004] The metal heating wire of this heating wire group is flush with the upper surface of the body. Although the outside of the metal heating wire is covered with at least two layers of high-temperature tape for insulation and heat insulation, the motor it is adapted to is a high-voltage AC motor. Therefore, once the high-temperature tape is damaged, there will be a safety hazard of electric shock. In addition, such a structural design does not meet the safety performance requirements of the UL safety test standards. Summary of the Invention

[0005] The utility model provides a sealing machine, the main purpose of which is to solve the potential safety hazard problem of the heating wire group of the existing vacuum sealing machine.

[0006] The utility model adopts the following technical solutions:

[0007] A sealing machine comprises a body, a cover and a heating wire group. The body is provided with the heating wire group and a shielding portion for preventing the heating wire group from being accidentally touched; the cover is provided with sealing silicone that cooperates with the heating wire group.

[0008] Furthermore, the shielding portion is a groove provided on the surface of the body, and the heating wire group is located in the groove.

[0009] Furthermore, both side walls of the groove are provided with hollow portions, and the hollow portions allow an electrical gap to exist between the heating wire group and the side walls of the groove.

[0010] Furthermore, the heating wire group is fixed at the bottom of the groove; or the heating wire group can be raised and lowered in the groove.

[0011] Furthermore, the cover is hinged to the body and is linked to the heating wire group through a linkage component. When the cover is opened, the heating wire group moves downward, and when the cover is closed, the heating wire group moves upward.

[0012] Furthermore, the shielding portion is a protrusion arranged around the heating wire group.

[0013] Furthermore, the protrusion is a barrier arranged around the periphery of the heating wire group.

[0014] Furthermore, a groove is provided at the bottom of the enclosure for the fresh-keeping bag to pass through.

[0015] Furthermore, the upper end of the enclosure is in a contracted shape.

[0016] Furthermore, the body is provided with a mounting groove, the heating wire group is mounted in the mounting groove through a connecting component, and an electrical gap exists between the heating wire group and a side wall of the mounting groove.

[0017] Compared with the prior art, the beneficial effects produced by the present invention are:

[0018] 1. The present invention cleverly realizes the embedded design of the heating wire group by providing a shielding portion on the surface of the body to prevent accidental touching of the heating wire group, thereby overcoming the safety hazard problem of the heating wire group being exposed on the surface of the body.

[0019] 2. The shielding portion in the present invention can be designed as a concave structure or a convex structure according to actual needs. It has flexible design and strong plasticity, and can meet the diverse needs of different models, different application scenarios or different users.

[0020] 3. The present invention clearly stipulates that when the safety test finger is inserted into the shielding part, the safety distance between the surface of the heating wire group and the end of the safety test finger is not less than 1 mm. Therefore, the sealing machine can meet the safety performance requirements of the UL safety test standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic structural diagram of the sealing machine when the cover is closed in the first embodiment of the present invention.

[0022] FIG2 is a schematic structural diagram of the sealing machine when the cover is opened in the first embodiment of the present invention.

[0023] FIG3 is a partial cross-sectional schematic diagram of the sealing machine in the first embodiment of the present invention.

[0024] FIG4 is a schematic structural diagram of the heating wire group in the first embodiment of the present invention.

[0025] FIG5 is an exploded schematic diagram of the heating wire assembly in the first embodiment of the present invention.

[0026] FIG6 is a partial cross-sectional schematic diagram of the sealing machine in the second embodiment of the present invention.

[0027] FIG7 is a cross-sectional view of the sealing machine when the cover is closed in the second embodiment of the present invention.

[0028] FIG8 is a cross-sectional view of the sealing machine when the cover is opened in the second embodiment of the present invention.

[0029] FIG9 is a schematic structural diagram of the sealing machine when the cover is opened in the third embodiment of the present invention.

[0030] FIG10 is a partial cross-sectional schematic diagram of the sealing machine in the third embodiment of the present invention.

[0031] FIG11 is a schematic structural diagram of the sealing machine when the cover is opened in the fourth embodiment of the present invention.

[0032] In the figure: 1-body; 10-installation slot; 11-groove; 12-slide slot; 13-slide buckle; 14-exhaust nozzle; 15-sealing rubber ring; 16-sealing clip; 17-connecting column; 18-hollow part; 19-enclosure; 191-yield slot; 2-cover; 21-sealing silicone; 22-cutter slot; 23-cutter; 24-knife holder; 25-buckle part; 26-sealing cotton; 27-connecting rod; 28-pivot seat; 3-heating wire group; 31-support frame; 311-strip groove; 312-end groove; 32-heating wire; 320-bending part; 321-insulating rod; 322-insulating sheath; 33-fixed seat; 34-spring; A-fresh-keeping bag. DETAILED DESCRIPTION

[0033] The specific embodiments of the present invention will be described below with reference to the accompanying drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details. Example

[0034] As shown in Figures 2 and 3, the present invention provides a sealing machine comprising a body 1, a cover 2, and a heating wire assembly 3. The body is provided with the heating wire assembly 3 and a shielding portion for preventing accidental contact with the heating wire assembly 3. The cover 2 is provided with a sealing silicone rubber 21 that cooperates with the heating wire assembly 3. Specifically, the shielding portion of this embodiment adopts a concave structural design, that is, a groove 11 is provided on the surface of the body 1 as the shielding portion, and the heating wire assembly 3 is positioned within the groove 11. This cleverly achieves an embedded design of the heating wire assembly 3, thereby overcoming the safety hazard of the heating wire assembly 3 being exposed on the surface of the body 1. When the cover 2 is closed, the sealing silicone rubber 21 is positioned within the groove 11, so that the fresh-keeping bag can be pressed into the groove 11 during sealing, ensuring that the fresh-keeping bag and the heating wire assembly 3 abut each other, thereby improving the sealing effect.

[0035] As shown in Figures 2 and 3, the heating wire assembly 3 is fixed to the bottom of the groove 11. Therefore, to ensure that the sealing machine meets the safety performance requirements of the UL safety test standard, the design should pay attention to the design dimensions of the groove 11 and the installation height of the heating wire assembly 3. When the safety test finger is inserted into the groove 11, the safety distance between the top of the heating wire assembly 3 and the end of the safety test finger is at least 1mm. Considering both product production cost and safety performance, the smaller the depth of the safety test finger inserted into the groove 11, the better. Therefore, in theory, the width W of the groove 11 can be directly set to be less than the minimum diameter of the safety test finger. However, to facilitate the sealing operation, it is necessary to more reasonably define the width and height of the groove 11 based on actual usage experience and sealing performance. Based on this, this embodiment further limits the width W of the notch of the groove 11 to ≤ 19mm. After testing, whether using the European or US safety test finger, this proportional design can ensure a safety distance of 1mm between the top of the heating wire assembly 3 and the end of the safety test finger, thus providing extremely high safety performance.

[0036] As shown in FIG3 , since the shielding portion of this embodiment is a concave structure, if the temperature of the side walls of the groove 11 is too high during sealing, the sides of the fresh-keeping bag may melt due to the heat and adhere to the side walls of the shielding portion. Therefore, this embodiment further defines: the side walls of the groove 11 are provided with hollow portions 18. These hollow portions 18 create an electrical gap between the heating wire assembly 3 and the side walls of the groove 11. This prevents the heating wire assembly 3 from directly conducting heat to the body 1, reducing the risk of the side of the fresh-keeping bag being stretched and deformed due to heat. Preferably, the electrical gap between the heating wire assembly 3 and the side walls of the groove 11 is at least 1 mm.

[0037] As shown in Figures 3 to 5, the heating wire assembly 3 includes a support frame 31, a heating wire 32, and a connecting assembly. The support frame 31 is mounted on the bottom of the groove 11 via the connecting assembly, and the support frame 31 is provided with a strip groove 311 along its length for mounting the heating wire 32. Specifically, the connecting assembly includes a fixing seat 33 and a connecting column 17. A number of spaced connecting columns 17 are provided within the hollow portion 18 on both sides of the groove 11. Several fixing seats 33 are fixed to the bottom of the connecting column 17 by bolts, while the support frame 31 and the heating wire 32 are mounted above the fixing seats 33. This achieves an overhead design for the heating wire 32, ensuring that both the support frame 31 and the heating wire 32 have an electrical clearance of at least 1mm from any position in the groove 11.

[0038] As shown in Figures 3 to 5 , the ends of the heating wire 32 extend along the bottom of the support frame 31 to form bent portions 320. End grooves 312 are provided at both ends of the support frame 31 for engaging with the bent portions 320. The bent portions 320 of the heating wire 32 cooperate with the end grooves 312 of the support frame 31, allowing the heating wire 32 to securely engage with the support frame 31 and ensuring structural stability for both.

[0039] As shown in Figures 3 to 5, the heating wire 32 comprises an insulating rod 321, a metal wire (not shown), and an insulating sheath 322. The metal wire is spirally wound around the insulating rod 321, and the insulating sheath 322 wraps around the metal wire and the insulating rod 321. Specifically, the operating voltage across the metal wire is ≥30V, ensuring that the heating wire assembly operates at high voltage during sealing, thereby ensuring sealing performance and efficiency. Preferably, the insulating rod 321 is made of fiberglass, and the insulating sheath 322 is made of polyimide.

[0040] As shown in Figure 1, the lid 2 is provided with a cutting slot 22, within which a cutter 23 for cutting the fresh-keeping bag is slidably mounted. Specifically, the lid 2 is provided with a knife holder 24 above the cutting slot 22. The handle of the cutter 23 is slidably mounted on the knife holder 24, while the blade of the cutter 23 is inserted into the cutting slot 22. Before filling, the cutter 23 can be used to quickly cut the fresh-keeping bag at the appropriate position, allowing for flexible adjustment of the bag's capacity, thus making the sealer design more user-friendly.

[0041] As shown in Figures 1 and 2, a slide groove 12 is provided on both sides of the machine body 1, and a slider 13 is provided in the slide groove 12. A buckle 25 is provided on both sides of the cover body 2 to cooperate with the slider 13. When not in use, the slider 13 buckles the cover body 2, so that the cover body 2 is firmly covered on the machine body 1, thereby preventing the cover body 2 from being accidentally opened and improving the safety performance of the sealing machine.

[0042] As shown in Figures 1 and 2, this sealing machine is specifically a vacuum sealer. Therefore, a vacuum assembly (not shown) is also provided within the body 1. A suction nozzle 14, connected to the vacuum assembly, is provided on the surface of the body 1. A sealing rubber ring 15 is provided around the outer periphery of the suction nozzle 14. The lid 2 is provided with a sealing sponge 26 that abuts against the sealing rubber ring 15. When the lid 2 is closed, the sealing sponge 26 abuts against the sealing rubber ring 15, forming a closed vacuum chamber within the sealing rubber ring 15. To facilitate vacuuming, the body 1 is provided with a plurality of sealing clips 16 within the sealing rubber ring 15 for securing the fresh-keeping bag.

[0043] As shown in Figures 1 and 5, the method of using the vacuum fresh-keeping bag is as follows: after loading the things, first place the bag opening of the fresh-keeping bag in the sealing rubber ring 15, and fix the bag opening with the sealing clip 16; then cover the cover body 2, and the sealing cotton 26 on the inside of the cover body 2 and the sealing rubber ring 15 on the surface of the body 1 abut against each other to form a closed air extraction cavity, and the sealing silica gel 21 on the inside of the cover body 2 presses the inner side of the bag opening of the fresh-keeping bag into the groove 11; start the vacuum button, and all the air in the fresh-keeping bag is extracted through the vacuum nozzle 14; after the vacuuming is completed, start the sealing button, and heat-seal the bag opening of the fresh-keeping bag through the heating wire group 3; after the heat sealing is completed, open the cover body 2 and take out the fresh-keeping bag. Example

[0044] As shown in Figures 6 to 8 , unlike the first embodiment, the heating wire assembly 3 in this embodiment is arranged in a vertically movable groove 11. Specifically, the lid 2 is hinged to the body 1 and is linked to the heating wire assembly 3 via a linkage assembly. When the lid 2 is opened, the heating wire assembly 3 moves downward, and when the lid 2 is closed, the heating wire assembly 3 moves upward. This design cleverly achieves the linkage between the lid and the heating wire assembly. Once the lid is opened, the heating wire assembly automatically descends to the bottom of the groove 11, thereby overcoming the safety hazard of the heating wire assembly 3 being exposed on the surface of the body 1. When the lid is closed, the heating wire assembly automatically rises and resets until its surface is flush with the notch of the groove 11. At this point, when the bag is sealed, the heating wire assembly 3 is ensured to be in full contact with the bag, thereby improving the sealing effect.

[0045] As shown in Figures 6 to 8, more specifically, the connecting assembly in this embodiment also includes a spring. The fixing seat 33 and the connecting column 17 are connected by a spring 34, allowing the heating wire assembly to be raised and lowered within the groove. The linkage assembly includes a connecting rod 27, which is roughly L-shaped. Its middle portion is hinged to the housing, with one end abutting against a pivot seat 28 of the lid and the other end abutting against the bottom of the support frame 31. When the lid 2 is closed, the pivot seat 28 lifts one end of the connecting rod 27, allowing the other end of the connecting rod 27 to lift the heating wire assembly 3 to the notch, allowing the housing 1 to begin sealing. When the lid 2 is opened, the pivot seat 28 and connecting rod 27 separate, freeing one end of the connecting rod 27 from the force, while the other end also separates from the support frame 31. The heating wire assembly 3, under the action of the spring 34, rests at the bottom of the groove 11, with a height difference between the top of the heating wire assembly 3 and the notch of the groove 11, thus forming a concave shielding portion.

[0046] It should be noted that the core protection point of this embodiment is that when sealed, the heating wire group 3 automatically rises to be flush with the notch of the groove 11. When not sealed, the heating wire group 3 automatically descends to form an inwardly concave shielding portion with the notch of the groove 11. Therefore, the up and down movement of the heating wire group 3 is not limited to the method provided in this embodiment, and other forms of linkage structures or electronic control structures may also be adopted. Example

[0047] As shown in FIG9 and FIG10 , different from the first embodiment, the shielding portion of this embodiment adopts a raised structural design, that is, a protrusion is provided around the heating wire group 3. More precisely, the protrusion is a barrier 19 arranged around the heating wire group.

[0048] As shown in Figures 9 and 10, due to the provision of a raised enclosure 19, the surface of the heating wire group 3 in this embodiment can be flush with the surface of the body 1, and there is no need to set a height difference. Based on this, this embodiment is provided with a mounting groove 10 connected to the interior of the body 1 on the body 1, and the heating wire group 3 is mounted in the mounting groove 10 through a connecting component. The structure of the connecting component is the same as that of the first embodiment and will not be repeated here. In order to reduce the risk of the side of the fresh-keeping bag being pulled and deformed by heat, there is also an electrical gap of more than 1 mm between the heating wire group 3 and the side wall of the mounting groove 10.

[0049] As a preferred embodiment, the upper end of the enclosure 19 is constricted. More specifically, in this embodiment, the cross-section of the enclosure 19 is an arc-shaped structure that extends obliquely toward the center of the mounting slot 10, thereby forming an arc-shaped cover with an opening in the center. This design can reduce the width of the enclosure 19 and reduce the risk of false triggering of the heating wire assembly 3. Example

[0050] As shown in Figure 11, the difference from the third embodiment is that this embodiment has a clearance groove 191 for the fresh-keeping bag A to pass through on the bottom side wall of the enclosure 19. As a preferred solution, the cross section of the enclosure of this embodiment is a rectangular structure.

[0051] It should be noted that the raised structure of the shielding portion is not limited to the two embodiments of the third and fourth embodiments. In actual applications, it can also be designed as other structures as needed, and the raised structure can be integrally formed with the body 1 or designed as a separate detachable structure.

[0052] The above is only a specific implementation method of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A sealing machine, comprising a machine body, a cover body and a heating wire group, characterized in that: The body is provided with the heating wire group and a shielding portion for preventing the heating wire group from being accidentally touched; the cover body is provided with sealing silica gel matched with the heating wire group.

2. A sealing machine as claimed in claim 1, characterized in that: The shielding portion is a groove arranged on the surface of the body, and the heating wire group is located in the groove.

3. A sealing machine as claimed in claim 2, characterized in that: Both side walls of the groove are provided with hollow parts, and the hollow parts allow an electrical gap to exist between the heating wire group and the side walls of the groove.

4. A sealing machine as claimed in claim 2, characterized in that: The heating wire group is fixedly arranged at the bottom of the groove; or the heating wire group can be arranged in the groove to be lifted up and down.

5. A sealing machine as claimed in claim 4, characterized in that: The cover is hinged to the machine body and is linked to the heating wire group through a linkage component. When the cover is opened, the heating wire group moves downward, and when the cover is closed, the heating wire group moves upward.

6. A sealing machine as claimed in claim 1, characterized in that: The shielding portion is a protrusion arranged around the heating wire group.

7. A sealing machine as claimed in claim 6, characterized in that: The protrusion is a barrier arranged around the periphery of the heating wire group.

8. A sealing machine as claimed in claim 7, characterized in that: A clearance groove for the fresh-keeping bag to pass through is provided at the bottom of the enclosure.

9. A sealing machine as claimed in claim 7, characterized in that: The upper end of the enclosure is in a contracted shape.

10. A sealing machine as claimed in claim 6, characterized in that: The machine body is provided with a mounting groove, the heating wire group is mounted in the mounting groove through a connecting component, and an electrical gap exists between the heating wire group and a side wall of the mounting groove.

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