Double ended mason jar vacuum sealer

Abstract

The utility model discloses a double -end mason jar vacuum sealing machine, it is designed to solve the poor adaptability problem of existing mason jar vacuum machine. The sealing machine contains first, second shell, first shell one end is equipped with first sealed cavity and first air valve subassembly, second shell one end is assembled with first shell, and the other end is equipped with second sealed cavity and second air valve subassembly, and two sealed cavities are different in diameter, and can correspond to the wide caliber and standard caliber of mason jar respectively. The air extraction component is installed between two shells, and contains the air extraction pump, solenoid valve and tee pipe, and the tee pipe is communicated with two sealed cavities and the air extraction pump. Control component has PCBA control panel and pressure valve, and the pressure valve is communicated with the tee pipe, and the PCBA control panel is electrically connected with the air extraction pump. This design makes the user not need to buy adapter or replace equipment additionally, and can be adapted directly by connecting different caliber mason jar, and the independent air valve subassembly ensures the sealing to be tight, and simplifies the operation process, and does not need to adjust the sealing parameter manually.

Description

Technical Field

[0001] This utility model relates to the field of sealing machine technology, and in particular to a double-headed Mason jar vacuum sealing machine. Background Technology

[0002] Mason jars, with their excellent sealing and durability, are widely used in home food preservation and homemade food storage. As consumers' demands for food safety and preservation quality increase, vacuum sealers for mason jars, which effectively extend the shelf life of food, have emerged, and market demand continues to grow. By creating a negative pressure environment by removing air from the mason jar, they provide reliable protection for food preservation and have become a common piece of equipment in many family kitchens.

[0003] Currently, Mason jar vacuum machines on the market have poor compatibility. Mason jars come in two common sizes: wide-mouth and standard-mouth, but many vacuum machines can only accommodate one of these sizes. This means that users with Mason jars of different sizes need to purchase adapters to fit those sizes, and in some cases, they may even have to replace the entire vacuum machine. This limitation in compatibility not only increases user costs but also leads to operational complexity and inconvenience.

[0004] For example, the converter disclosed in patent CN115367295A for adapting to Mason jars of different diameters, although it solves the adaptation problem to some extent, is relatively cumbersome to operate and requires users to perform complicated installation and debugging steps. Utility Model Content

[0005] The purpose of this invention is to disclose a double-headed Mason jar vacuum sealing machine, which solves the problem of poor adaptability of existing equipment, while taking into account both sealing performance and ease of operation, providing a more efficient food preservation solution for home users.

[0006] To achieve the above objectives, this utility model discloses a double-headed Mason jar vacuum sealing machine, comprising: a first outer shell, one end of which is provided with a first sealing cavity, and a first air valve assembly disposed within the first sealing cavity; a second outer shell, one end of which is assembled with the other end of the first outer shell, and the other end of which is provided with a second sealing cavity, and a second air valve assembly disposed within the second sealing cavity; an air extraction assembly, which is assembled between the first and second outer shells, and includes an air extraction pump, a solenoid valve, and a three-way pipe, the three-way pipe being connected to the first sealing cavity, the second sealing cavity, and the air extraction pump respectively; and a control assembly, which includes a PCBA control board and a pressure valve, the pressure valve being connected to the three-way pipe, and the PCBA control board being electrically connected to the pressure valve and the air extraction pump; wherein the diameters of the first sealing cavity and the second sealing cavity are different.

[0007] By adopting the above solution, a first sealing cavity and a second sealing cavity with different diameters are respectively set in the first and second outer shells, directly corresponding to the wide-mouth and standard-mouth diameters of Mason jars. Users do not need to purchase additional adapters or replace equipment; they only need to connect Mason jars of different diameters to the corresponding sealing cavities to complete the adaptation. Each sealing cavity is equipped with an independent air valve assembly to ensure a tight seal with the Mason jar opening during vacuuming. This avoids the problem of incomplete sealing caused by diameter differences and simplifies the user's operation process, eliminating the need for manual adjustment of sealing parameters.

[0008] Further, the first air valve assembly includes: a first fixing member, which includes a first reset member groove, a first sealing member groove, and a first mounting hole in sequence from the axis outwards, and the first fixing member is mounted inside the first housing through the first mounting hole; a first reset member, one end of which is inserted into the first reset member groove; a first sealing ring, which is installed in the first sealing member groove; a first sealing ball, which is placed at the axis of the first sealing ring; and a first push switch, one end of which abuts against the first sealing ball, and the other end protruding from the bottom surface of the first sealing cavity.

[0009] By adopting the above scheme, the first sealing ring can be precisely positioned and fixed. When the first sealing ball is placed at the axis of the first sealing ring, during the vacuuming process, under the combined action of external atmospheric pressure and negative pressure inside the cavity, the first sealing ball will be tightly pressed against the first sealing ring, forming a reliable seal. This effectively prevents air leakage into the Mason jar, ensures the stability of the vacuum environment, and thus better extends the shelf life of food.

[0010] Further, the second air valve assembly includes: a second fixing member, which includes, from the axis outward, a second reset member groove, a second sealing member groove, and a second mounting hole, and the second fixing member is mounted inside the second housing through the second mounting hole; a second reset member, one end of which is inserted into the second reset member groove; a second sealing ring, which is installed in the second sealing member groove; a second sealing ball, which is placed at the axis of the second sealing ring; and a second push switch, one end of which abuts against the second sealing ball, and the other end protruding from the bottom surface of the second sealing cavity.

[0011] By adopting the above scheme, the second reset component endows the second air valve assembly with dynamic sealing adjustment function. During the vacuuming process, as the pressure inside the cavity gradually decreases, the second sealing ball continuously presses against the second sealing ring under atmospheric pressure, enhancing the sealing effect. When it is necessary to open the Mason jar, pressing the second press switch with the lid pushes the second sealing ball, overcoming the elasticity of the second reset component, causing the second sealing ball to separate from the second sealing ring, breaking the seal, allowing air to enter the jar, and achieving smooth opening. This design can adapt to different working conditions, ensuring flexibility and reliability in sealing and opening.

[0012] Furthermore, the first valve assembly and the second valve assembly are arranged symmetrically.

[0013] By adopting the above solution, the symmetrically arranged valve assemblies result in a more even weight distribution for the equipment, effectively balancing the overall center of gravity of the vacuum sealing machine. The symmetrical layout also allows for a more rational planning of the internal space, leading to a more compact and orderly arrangement of the various components.

[0014] Furthermore, both the bottom surfaces of the first and second sealing cavities are provided with perforations. Both the first and second push switches include: an extension section passing through the perforation; a snap-fit ​​section connected to one end of the extension section, with at least two snap-fit ​​blocks circumferentially arranged on the snap-fit ​​section for abutting against the edge of the perforation; and a pressing section connected to the other end of the extension section, with a cross-sectional radius larger than that of the extension section for abutting against the edge of the perforation.

[0015] By adopting the above-described scheme, the extension section is inserted into the perforation at the bottom of the sealed cavity. This design provides precise positioning for the push-button switch, ensuring stable vertical movement without deviation. Simultaneously, the locking and pressing sections are confined to both ends of the perforation, preventing the extension section from detaching from the perforation.

[0016] Furthermore, the snap-fit ​​segment is provided with at least two deformation gaps, and the deformation gaps and the snap-fit ​​block are staggered along the circumferential interval of the snap-fit ​​segment.

[0017] By adopting the above scheme, when assembling the push-button switch extension through the perforation on the bottom surface of the sealed cavity, the deformation gap in the locking section provides space for the locking block to elastically deform. When the locking block contacts the edge of the perforation, due to the existence of the deformation gap, the locking block can elastically contract to a certain extent in the direction of the gap, thereby reducing the friction and insertion resistance between the locking block and the edge of the perforation. This allows assemblers to insert the push-button switch into the perforation more easily and smoothly, greatly improving assembly efficiency and reducing potential damage to components caused by excessive force during assembly.

[0018] Furthermore, the end of the snap-fit ​​block facing the pressing section is provided with an abutting plane, and the end of the snap-fit ​​block corresponding to the abutting plane is provided with a guide slope.

[0019] By employing the above scheme, when the latching block approaches the edge of the perforation, the guide ramp can make a gradual contact with the edge of the perforation. As the push switch continues to be inserted, the guide ramp will convert the resistance at the edge of the perforation into a component force along the ramp direction, guiding the latching block to retract smoothly into the perforation.

[0020] Furthermore, the sidewalls of the first and / or second housings are provided with recesses, and a bottle opener is hinged within the recesses.

[0021] By adopting the above solution, users no longer need to search for a special bottle opener when they need to open bottled beverages while storing food. They can simply use the bottle opener on the device, which greatly improves the practicality and versatility of the product.

[0022] Furthermore, the PCBA control board integrates a power button and a digital display screen.

[0023] By adopting the above solution, the integration of the power button makes the operation of the device simpler and clearer. The digital display screen can intuitively display various operating status information of the device in the form of numbers, symbols, or graphics, such as the current working mode, temperature, time, and remaining battery power.

[0024] Furthermore, it also includes a battery, which is electrically connected to the PCBA control board.

[0025] By adopting the above solution, the device can be freed from the constraints of cables, allowing users to use it wherever needed, whether it's for outdoor picnics, wilderness adventures, or even in an indoor corner without a power outlet, greatly improving the flexibility of use.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting a first sealing cavity and a second sealing cavity with different diameters in the first and second outer shells respectively, the system can directly adapt to the two common sizes of Mason jars: wide-mouth and standard-mouth. This means that users no longer need to purchase adapters for different-diameter Mason jars, nor do they need to replace the entire vacuum machine when dealing with different-diameter jars. This greatly improves the equipment's adaptability to different sizes of Mason jars, allowing users to use Mason jars of various diameters more freely without worrying about compatibility issues, thus better meeting the diverse food preservation needs of families. 2. Each sealed cavity is equipped with an independent valve assembly. During vacuuming, these valve assemblies form a tight seal with the corresponding diameter Mason jar opening. This design avoids sealing issues caused by differences in diameter, effectively preventing air from entering the jar during vacuuming. It provides a reliable negative pressure preservation environment for food, extending its shelf life. The pressure valve in the control assembly is connected to a three-way pipe, enabling real-time monitoring and precise control of the pressure within the sealed cavity. During vacuuming, the pressure valve automatically adjusts the working state of the vacuum pump according to the preset pressure value, ensuring that each sealed cavity reaches a suitable vacuum level, further improving the sealing effect and preservation quality. 3. Users do not need to perform complicated manual adjustments of sealing parameters; they can easily adapt and begin vacuuming simply by connecting Mason jars of different diameters to the corresponding sealing chambers. This simple and intuitive operation method allows even users unfamiliar with electronic equipment to quickly get started, greatly saving operation time and effort. 4. The double-headed Mason jar vacuum sealer adopts an integrated design, combining two sealing chambers of different diameters into one device. The efficient layout of the vacuum and control components further enhances the overall compactness of the equipment. Compared to traditional solutions that require multiple adapters or different specifications, this device occupies less space, making it convenient for users to store and use in limited spaces such as kitchens. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 3 This is a cross-sectional structural diagram of an embodiment of the present utility model; Figure 4 This is a schematic diagram of the exploded structure of an embodiment of the present utility model; Figure 5 This is a schematic diagram of the internal pipeline structure of an embodiment of the present utility model; Figure 6 This is an exploded view of the valve assembly according to an embodiment of the present invention.

[0029] Explanation of key figure labels: 1. First outer casing; 11. First sealed cavity; 2. Second outer casing; 21. Second sealed cavity; 3. Vacuum assembly; 31. Vacuum pump; 32. Solenoid valve; 33. T-pipe; 4. Control assembly; 41. PCBA control board; 411. Power button; 412. Digital display screen; 42. Pressure valve; 43. Battery; 5. First air valve assembly; 51. First fixing member; 511. First reset member groove; 512. First sealing member groove; 513. First mounting hole; 52. First reset member; 53. First sealing ring; 54. 55. First push-button switch; 551. Extension section; 552. Snap-fit ​​section; 5521. Snap-fit ​​block; 5522. Deformation gap; 5523. Abutment plane; 5524. Guide slope; 553. Press-button section; 6. Second valve assembly; 61. Second fixing member; 611. Second reset member groove; 612. Second sealing member groove; 613. Second assembly hole; 62. Second reset member; 63. Second sealing ring; 64. Second sealing ball; 65. Second push-button switch; 7. Perforation; 8. Recess; 81. Bottle opener. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0032] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0033] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0034] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0035] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0036] Please refer to Embodiment 1 of this utility model. Figures 1 to 6As shown in the figure, this application provides a double-headed Mason jar vacuum sealing machine, including a first outer shell 1, a second outer shell 2, an air extraction component 3, and a control component 4. The first outer shell 1 and the second outer shell 2 are assembled back-to-back to form a double-cavity structure. Optionally, the first outer shell 1 and the second outer shell 2 are made of high-strength plastic material and are injection molded. The connection between them includes, but is not limited to, threaded connection, magnetic connection, or snap-fit. Specifically, one end of the first outer shell 1 is provided with a first sealing cavity 11, and a first air valve component 5 is provided inside the first sealing cavity 11. One end of the second outer shell 2 is assembled with the other end of the first outer shell 1, and the other end of the second outer shell 2 is provided with a second sealing cavity 21, and a second air valve component 6 is provided inside the second sealing cavity 21. The diameters of the first sealing cavity 11 and the second sealing cavity 21 correspond to a standard Mason jar and a wide-mouth Mason jar, respectively. The air extraction component 3 is assembled between the first outer shell 1 and the second outer shell 2 and includes an air pump 31, a solenoid valve 32, and a three-way pipe 33. The air pump 31 is a small, high-efficiency vacuum pump that can quickly extract air from the sealed cavity. Solenoid valve 32 controls the opening and closing of the air path. Three-way pipe 33 is connected to the first sealed cavity 11, the second sealed cavity 21, and the vacuum pump 31, respectively. When vacuuming is required, solenoid valve 32 opens, vacuum pump 31 operates, and air is simultaneously drawn from both sealed cavities through three-way pipe 33, creating a negative pressure environment. The control component 4 includes PCBA control board 41 and pressure valve 42. Pressure valve 42 is connected to three-way pipe 33, and PCBA control board 41 is electrically connected to pressure valve 42 and vacuum pump 31. Optionally, PCBA control board integrates a power button 411 and a digital display screen 412. Power button 411 is used to turn the device on and off, and digital display screen 412 can intuitively display the device's operating mode, pressure value, remaining power, and other information. Pressure valve 42, connected to three-way pipe 33, can monitor the pressure in the sealed cavities in real time and feed the pressure signal back to PCBA control board. The PCBA control board controls the operating status of the vacuum pump 31 and the on / off state of the solenoid valve 32 according to the preset program and pressure feedback signal. For example, when the pressure reaches the preset vacuum level, the PCBA control board controls the vacuum pump 31 to stop working and the solenoid valve 32 to close, maintaining a negative pressure state in the sealed cavity.

[0037] The first sealing cavity 11 and the second sealing cavity 21 have different diameters. The first outer shell 1 and the second sealing cavity 21, with their different diameters, are respectively housed in the second outer shell 2 and the first sealing cavity 11, directly corresponding to the wide-mouth and standard-mouth diameters of Mason jars. Users do not need to purchase additional adapters or replace equipment; they only need to connect Mason jars of different diameters to the corresponding sealing cavities to achieve compatibility. Each sealing cavity is equipped with an independent valve assembly to ensure a tight seal with the Mason jar opening during vacuuming. This avoids sealing issues caused by diameter differences and simplifies the user's operation process, eliminating the need for manual adjustment of sealing parameters.

[0038] In this embodiment 1, the first fixing member 51 is provided with a first reset member groove 511, a first sealing member groove 512, and a first assembly hole 513 sequentially from the axis outward. The first fixing member 51 is assembled into the inside of the first outer shell 1 by screws through the first assembly hole 513. The first reset member 52 is a spring, one end of which is inserted into the first reset member groove 511. The first sealing ring 53 is made of silicone and is installed in the first sealing member groove 512, providing good elasticity and sealing performance. The first sealing ball 54 is made of stainless steel and is placed at the axis of the first sealing ring 53. One end of the first push switch 55 abuts against the first sealing ball 54, and the other end protrudes from the bottom surface of the first sealing cavity 11. When a vacuum operation is performed, the external atmospheric pressure and the negative pressure inside the cavity cause the first sealing ball 54 to press tightly against the first sealing ring 53, forming a reliable seal; when it is necessary to open the Mason jar, the first push switch 55 is pressed by the lid, pushing the first sealing ball 54 to separate from the first sealing ring 53, thus breaking the seal. The structure of the second air valve assembly 6 is symmetrically arranged with that of the first air valve assembly 5. Similarly, the second fixing member 61 is arranged from the axis outwards as follows: a second reset member groove 611, a second sealing member groove 612, and a second mounting hole 613, and is assembled into the interior of the second housing 2 by screws. The materials and functions of the second reset member 62, the second sealing ring 63, the second sealing ball 64, and the second push switch 65 are the same as their corresponding components in the first air valve assembly 5. This symmetrical arrangement ensures even weight distribution and balances the overall center of gravity, while also rationally planning the internal space to create a compact and orderly arrangement of components.

[0039] In some embodiments, the first valve assembly 5 and the second valve assembly 6 are symmetrically arranged. The symmetrical arrangement of the valve assemblies makes the weight distribution of the equipment more uniform and can effectively balance the overall center of gravity of the vacuum sealing machine. The symmetrical layout can more rationally plan the internal space of the equipment, making the arrangement of various components more compact and orderly.

[0040] In some embodiments, both the bottom surface of the first sealing cavity 11 and the bottom surface of the second sealing cavity 21 are provided with through holes 7. The first push switch 55 and the second push switch 65 have the same structure, both including an extension section 551, a snap-fit ​​section 552, and a pressing section 553. The extension section 551 passes through the through hole 7, providing precise positioning for the push switch and ensuring its vertical and stable movement. The snap-fit ​​section 552 is connected to one end of the extension section 551, and at least two snap-fit ​​blocks 5521 are provided circumferentially. The snap-fit ​​blocks 5521 are used to abut against the edge of the through hole 7 to prevent the extension section 551 from disengaging from the through hole 7. At the same time, the snap-fit ​​section 552 is provided with at least two deformation gaps 5522, which are staggered with the snap-fit ​​blocks 5521 circumferentially. During assembly, the deformation gaps 5522 provide elastic deformation space for the snap-fit ​​blocks 5521, reducing insertion resistance and improving assembly efficiency. The snap-fit ​​block 5521 has an abutment surface 5523 at one end facing the pressing section 553, and a guide slope 5524 at the other end corresponding to the abutment surface 5523. When the snap-fit ​​block 5521 approaches the edge of the through hole 7, the guide slope 5524 converts the resistance into a component force along the slope direction, guiding the snap-fit ​​block 5521 to retract smoothly into the through hole 7. The pressing section 553 is connected to the other end of the extension section 551, and its cross-sectional radius is larger than that of the extension section 551, used to abut against the edge of the through hole 7, further restricting the position of the push-button switch.

[0041] In some embodiments, the sidewalls of the first housing 1 and / or the second housing 2 are provided with recesses 8, and a bottle opener 81 is hinged within the recesses 8. In this embodiment 1, the recesses 8 exist on the sidewalls of both the first housing 1 and the second housing 2. When storing food, if a user needs to open a bottled beverage, there is no need to search for a dedicated bottle opener 81; the user can directly use the bottle opener 81 on the device, greatly improving the practicality and versatility of the product.

[0042] In some embodiments, the device is also equipped with a battery 43, which is electrically connected to the PCBA control board to provide power to the device, freeing it from cable constraints and enabling it to be used outdoors or in places without power outlets, thus improving the flexibility of use.

[0043] In use, the user connects the Mason jar to the corresponding first sealed cavity 11 or second sealed cavity 21 according to its diameter. Pressing the power button 411 turns on the device. The PCBA control board controls the solenoid valve 32 to open, and the vacuum pump 31 starts working, drawing air from the sealed cavity through the three-way pipe 33. The pressure valve 42 monitors the pressure in real time. When the preset vacuum level is reached, the PCBA control board controls the vacuum pump 31 to stop working, and the solenoid valve 32 to close, completing the vacuuming operation. To open the Mason jar, press the corresponding push switch on the lid to break the seal, allowing air to enter the jar, which can then be opened smoothly.

[0044] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting a first sealing cavity 11 and a second sealing cavity 21 with different diameters in the first outer shell 1 and the second outer shell 2 respectively, the system can directly adapt to the two common specifications of Mason jars: wide-mouth and standard-mouth. This means that users no longer need to purchase adapters to fit different diameter Mason jars, nor do they need to replace the entire vacuum machine when dealing with jars of different diameters. This greatly improves the equipment's adaptability to Mason jars of different specifications, allowing users to use Mason jars of various diameters more freely without worrying about compatibility issues, thus better meeting the diverse food preservation needs of families. 2. Each sealed cavity is equipped with an independent valve assembly. During vacuuming, these valve assemblies form a tight seal with the corresponding diameter Mason jar opening. This design avoids sealing issues caused by differences in diameter, effectively preventing air from entering the jar during vacuuming, providing a reliable negative pressure preservation environment for food, and better extending the shelf life of food. The pressure valve 42 in control assembly 4 is connected to the three-way pipe 33, enabling real-time monitoring and precise control of the pressure within the sealed cavity. During vacuuming, the pressure valve 42 can automatically adjust the working state of the vacuum pump 31 according to the preset pressure value, ensuring that each sealed cavity reaches a suitable vacuum level, further improving the sealing effect and preservation quality. 3. Users do not need to perform complicated manual adjustments of sealing parameters; they can easily adapt and begin vacuuming simply by connecting Mason jars of different diameters to the corresponding sealing chambers. This simple and intuitive operation method allows even users unfamiliar with electronic equipment to quickly get started, greatly saving operation time and effort. 4. The double-headed Mason jar vacuum sealer adopts an integrated design, combining two sealing chambers of different diameters into one device. The efficient layout of the vacuum assembly 3 and control assembly 4 further enhances the overall compactness of the equipment. Compared to traditional solutions that require multiple adapters or different specifications, this device occupies less space, making it convenient for users to store and use in limited spaces such as kitchens.

[0045] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

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