Door stopper device, door body and equipment

Abstract

The invention relates to the technical field of electric appliances, in particular to a door stopper device, a door body and equipment. The door stopper device is suitable for being mounted on a door body or a box body, and comprises a shell, a door stopper, a door stopper and a door stopper, the driving assembly is at least partially arranged in the accommodating space; the first magnetic part is arranged on the driving assembly and corresponds to a second magnetic part arranged on the refrigerator body or the door body, so that the distance between the first magnetic part and the second magnetic part is changed under the action of the driving assembly, and the magnetic attraction force between the first magnetic part and the second magnetic part is adjusted. The distance between the first magnetic part and the second magnetic part can be flexibly adjusted through the movement of the driving assembly and the first magnetic part, so that the magnetic attraction force can be adjusted.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, specifically to door catch devices, door bodies, and equipment. Background Technology

[0002] Various storage appliances, such as refrigerators, ovens, disinfection cabinets, and industrial cabinets, usually have closable doors for easy access to stored items. However, due to manufacturing and assembly errors, or after long-term use, the doors are prone to deformation, resulting in uneven contact between the door and the cabinet. Although door catches can generate a certain magnetic attraction between the door and the cabinet, the magnitude of this magnetic attraction is fixed. Therefore, the internal sealing of the appliance is poor, and it may even cause the appliance to malfunction due to air leakage. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the magnetic attraction force of the existing door catch device is fixed and cannot meet the actual needs, thereby providing a door catch device.

[0004] Another technical problem that this invention aims to solve is to overcome the defects of uneven fit between the door and the housing and poor sealing in the prior art, thereby providing a door.

[0005] Another technical problem that this invention aims to solve is to overcome the problem of poor sealing performance of existing equipment, which affects the use and smoothness of opening and closing doors, thereby providing a device.

[0006] On one hand, the present invention provides a door catch device suitable for installation on a door or cabinet, the door catch device comprising:

[0007] The shell has a storage space; The drive components are at least partially located within the housing space; The first magnetic component is disposed on the drive assembly and is correspondingly disposed on the second magnetic component disposed on the box or door, so as to change the distance between the first magnetic component and the second magnetic component under the action of the drive assembly, thereby adjusting the magnetic attraction between them.

[0008] Beneficial effects: When a large indentation occurs in the door or cabinet away from the cabinet or door, the drive assembly can drive the first magnetic component to move towards the cabinet or door, thereby bringing the first magnetic component closer to the second magnetic component, thus reducing the distance between the first and second magnetic components. Based on the physical characteristics of magnetic force and distance—that is, magnetic attraction increases non-linearly and rapidly as the gap decreases—the magnetic attraction at this location will significantly increase, thereby generating a greater closing auxiliary pulling force on the door or cabinet, pulling the indented area of ​​the door or cabinet towards the cabinet or door, and thus reducing the gap between the door and cabinet; when a large indentation occurs in the direction towards the cabinet or door... When the door is recessed, the first magnetic component can be driven by the drive assembly to move away from the cabinet or door, thus moving it away from the second magnetic component and increasing the distance between them. Based on the physical properties of magnetic force and distance—that is, the magnetic attraction decreases rapidly and nonlinearly as the gap increases—the magnetic attraction at that location weakens rapidly. This effectively releases the excessive attraction caused by the local deformation of the door or cabinet, causing the recessed area of ​​the door or cabinet to deform away from it. This eliminates the interference phenomenon of the door closing too tightly and opening too forcefully, allowing the door to close smoothly in that area with appropriate force. Compared to existing technologies, since the distance between the first and second magnetic components can be flexibly adjusted by the drive assembly and the movement of the first magnetic component, the range of magnetic attraction is adjustable, meeting practical needs.

[0009] In one optional embodiment, a guide component is provided in the accommodating space, a drive component is drivenly connected to the guide component, a first magnetic element is provided on the guide component, the drive component drives the guide component to drive the first magnetic element to move, change the distance between the first magnetic element and the second magnetic element, and thereby adjust the magnetic attraction between them.

[0010] The driving force applied by the drive component is transmitted to the first magnetic component through the guide component, thereby enabling the guide component to guide the movement of the first magnetic component, ensuring the accuracy of its movement, and thus ensuring the fit between the door and the box.

[0011] In one optional embodiment, the guiding component includes a first guiding structure and a second guiding structure, a first magnetic element is disposed on the first guiding structure, the second guiding structure is fixed in the receiving space, and the first guiding structure is slidably connected to the second guiding structure along the movement direction of the first magnetic element.

[0012] By driving the first guide structure to move relative to the second guide structure, the first magnetic component is driven to move towards or away from the second magnetic component. This can minimize the length of the housing in the direction of movement of the first magnetic component, that is, reduce the space occupied by the housing in this direction on the door, and basically not affect the setting of other structures on the door, thus reducing costs.

[0013] In one alternative implementation, the driving component is a linear drive mechanism.

[0014] By converting the externally input rotational motion into linear motion of the first guide structure relative to the second guide structure through a linear drive mechanism, the length of the housing in the direction of motion of the first magnetic component can be made relatively small.

[0015] In one alternative embodiment, the linear drive mechanism includes a worm gear and a worm shaft that are meshed together. One end of the worm shaft extends outside the receiving space to form a drive end. An adjusting screw is provided on the worm gear. A first guide structure is sleeved on the adjusting screw to drive the first magnetic component to move under the drive of the adjusting screw.

[0016] The rotational motion of the worm gear is converted into linear motion by an adjusting screw coaxially mounted with it. Since one end of the adjusting screw is fixed, the first and second guide structures are slidably connected along the direction of motion of the first magnetic component. Therefore, the worm gear can drive the first guide structure to move only along the axial direction of the adjusting screw. This ensures smooth and reliable worm gear transmission, achieving precise stepless adjustment of the gap between the first and second magnetic components. Furthermore, the inherent reverse self-locking characteristic of the worm gear ensures that the gap between the first and second magnetic components remains unchanged even under long-term vibration and magnetic reaction, maintaining long-term stability of the adjusted state.

[0017] In one optional embodiment, the first guide structure is provided with a slide rail or guide groove arranged parallel to the axial direction of the adjusting screw, and the second guide structure is provided with a guide groove or slide rail arranged parallel to the axial direction of the adjusting screw, with the slide rail and guide groove slidingly engaged.

[0018] The sliding rail and guide groove have a simple and easy-to-process structure, and ensure the reliability of linear motion.

[0019] In one alternative implementation, both the slide rail and the guide groove have a "T" or "I" shaped cross-section.

[0020] The "T" or "I" shaped slide rails and guide grooves not only ensure linear movement and provide guidance, but also prevent the slide rail from detaching from the guide groove, further ensuring the reliability of the installation.

[0021] In one optional embodiment, a sealing ring is provided at the contact position between the drive end of the worm gear and the housing, and the sealing ring is flush with the outer surface of the housing.

[0022] The sealing ring ensures the airtightness of the housing, completely isolating the entire device from the surrounding environment. This effectively prevents environmental influences, ensuring long-term operational reliability under complex conditions and extending service life. The sealing ring is flush with the outer surface of the housing, eliminating axial clearance in the worm gear and ensuring reliable bidirectional fixation, smooth transmission without any slippage.

[0023] In one alternative embodiment, the drive end of the worm gear is further provided with an operating part, which is connected to the worm gear.

[0024] The operating section is designed to allow the operator to easily apply driving force by holding the worm gear drive end.

[0025] In one alternative implementation, the door catch device is mounted on the door.

[0026] Installing the door catch device at a predetermined position on the door can make reasonable use of the door's space and avoid interfering with the installation of other structures.

[0027] On the other hand, a door body is also provided, including a door catch device.

[0028] In one alternative embodiment, the door catch device is disposed on the door body, and multiple devices are spaced apart along the height direction of the door body.

[0029] The multiple door catch devices along the height of the door allow for precise control of the magnetic attraction at different positions of the door by adjusting the distance between the first and second magnetic components in each device. This balances the closing force at each position of the door, compensating for unevenness caused by deformation and manufacturing tolerances, and ensuring a smooth fit between the door and the enclosure, thus guaranteeing the enclosure's airtightness.

[0030] In one alternative embodiment, the door body is provided with a mounting groove, the inner side wall of the mounting groove is provided with a slot, and the outer side wall of the housing is provided with a buckle, which is adapted to engage and fix with the slot.

[0031] The combination of the slot and the buckle structure enables a reliable connection between the door catch device and the door body, ensuring that the door catch device does not shift during the door body foaming process. After foaming, the foam material itself covers the door catch device, further enhancing its installation strength and reliability, and making it easy to install and disassemble.

[0032] On the other hand, a device including a door is also provided.

[0033] Because the gap between the door and the housing can be precisely adjusted by the movement of the first magnetic component relative to the second magnetic component, this device has better sealing performance and is more reliable in use.

[0034] In one alternative embodiment, the device is a refrigerator, the door body includes a door liner, and a door catch device is disposed on the door liner.

[0035] Installing a door catch device on the refrigerator door can improve the fit between the door and the refrigerator body, ensuring a tight seal.

[0036] In one alternative embodiment, the refrigerator further includes a center beam, with the door catch device corresponding to the center beam of the refrigerator, and an installation space for the door seal component is reserved between the door catch device and the center beam.

[0037] The door catch device is located on the door liner, and there is a reserved installation space between it and the center beam to facilitate the installation of the door sealing components; and the sealing shell can effectively isolate the foam layer and low-temperature humid air inside the refrigerator, preventing condensation and ice formation inside the refrigerator from causing mechanical jamming or corrosion, thus improving the service life of the equipment. Attached Figure Description

[0038] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the door catch device according to an embodiment of the present invention; Figure 2 This is an exploded view of the door suction device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the door catch device after the top cover has been removed, according to an embodiment of the present invention. Figure 4 This is a schematic diagram showing the installation of the worm gear, adjusting screw, first guide structure, and first magnetic component; Figure 5 This is a schematic diagram of the installation of the first guide structure and the first magnetic component; Figure 6 This is a partial schematic diagram of the door catch device after it has been installed with the door body. Figure 7 This is a schematic diagram of the first magnetic component moving towards the box. Figure 8 This is a schematic diagram showing the first magnetic component in its closest position to the housing. Figure 9 This is a schematic diagram of the first magnetic component moving away from the box. Figure 10 This is a schematic diagram showing the first magnetic component at its furthest position from the housing.

[0040] Explanation of reference numerals in the attached figures: 1. Door body; 2. Housing; 201. Top cover; 202. End cover; 3. Guide assembly; 301. First guide structure; 3011. Mounting part; 3012. Slide rail; 302. Second guide structure; 3021. Guide groove; 4. Drive assembly; 401. Worm gear; 402. Worm; 403. Adjusting screw; 5. First magnetic component; 6. Second magnetic component; 7. Sealing ring; 8. Operating part. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] The following is combined Figures 1 to 10 Embodiments of the present invention are described.

[0043] According to an embodiment of the present invention, in a first aspect, a door catch device is provided, suitable for installation on a door body 1 or a housing, the door catch device comprising: Shell 2 has a receiving space; The drive component 4 is at least partially located within the receiving space; The first magnetic element 5 is disposed on the drive assembly 4 and is correspondingly disposed on the second magnetic element 6 disposed on the box or door 1, so as to change the distance between the first magnetic element 5 and the second magnetic element 6 under the action of the drive assembly 4, thereby adjusting the magnetic attraction between them.

[0044] like Figure 1 and Figure 2As shown, the housing 2 is typically a cuboid, but can also be a cube or prism, etc., without specific limitations. This embodiment uses a cuboid as an example for illustration. The housing 2 is a sealed structure to prevent the external environment from affecting the internal structure. The material can be an alloy or other corrosion-resistant metal. One end of the drive component 4 is exposed outside the housing 2 to facilitate operation by the operator, but the exposed length should not be too long to avoid interfering with other structures on the door 1. The other end extends into the receiving space of the housing 2 to connect with the first magnetic component 5. Of course, the drive component 4 can also be electrically driven, without specific limitations. A second magnetic element 6 is provided on the box or door 1 at a position corresponding to the first magnetic element 5. In this embodiment, the first magnetic element 5 is a permanent magnet, and the second magnetic element 6 is a ferromagnetic beam in the box. Since the beam in the box is usually made of ferromagnetic metal, it can be directly used as the second magnetic element 6, avoiding the need to add other magnetic elements and reducing costs. Of course, the first magnetic element 5 and the second magnetic element 6 can also be permanent magnets with opposite magnetic properties, and no specific limitation is made here. The door catch device in this embodiment can be installed on the door 1 or on the box, as long as the first magnetic element 5 and the second magnetic element 6 are set in correspondence, and no specific limitation is made here.

[0045] Beneficial effects: When a large indentation occurs in the door 1 or the cabinet away from the cabinet or door 1, the first magnetic component 5 can be driven by the drive assembly 4 to move towards the cabinet or door 1, thereby bringing the first magnetic component 5 closer to the second magnetic component 6, i.e., reducing the distance between the first magnetic component 5 and the second magnetic component 6. According to the physical characteristics of magnetic force and distance, that is, the magnetic attraction force increases rapidly and nonlinearly as the gap decreases, the magnetic attraction force at this position will be significantly enhanced, thereby generating a greater closing auxiliary pulling force on the door 1 or the cabinet, pulling the indented area of ​​the door 1 or the cabinet towards the cabinet or door 1, and thus reducing the gap between the door 1 and the cabinet; when a large indentation occurs in the door 1 or the cabinet towards the cabinet or door 1... When the door is trapped, the first magnetic component 5 can be driven by the drive assembly 4 to move away from the box or door 1, thereby moving the first magnetic component 5 away from the second magnetic component 6, increasing the distance between the first magnetic component 5 and the second magnetic component 6. According to the physical characteristics of magnetic force and distance, the magnetic attraction force decreases rapidly and nonlinearly as the gap increases. Therefore, the magnetic attraction force at this position decreases rapidly, effectively releasing the excessive attraction force of the box or door 1 caused by the local deformation of the door or box. That is, the concave area of ​​the door or box deforms away from the box or door 1, thereby eliminating the interference phenomenon of closing too tightly and opening too forcefully. This allows the door 1 to achieve smooth closure and tight fit in this area with appropriate force. Compared with the prior art, since the distance between the first magnetic component 5 and the second magnetic component 6 can be flexibly adjusted by the movement of the drive assembly 4 and the first magnetic component 5, the magnitude of the magnetic attraction force is adjustable, meeting practical needs.

[0046] In one embodiment, a guide component 3 is provided in the accommodating space, a drive component 4 is drivenly connected to the guide component 3, a first magnetic element 5 is provided on the guide component 3, and the drive component 4 drives the guide component 3 to drive the first magnetic element 5 to move, change the distance between the first magnetic element 5 and the second magnetic element 6, and thereby adjust the magnetic attraction between the two.

[0047] In this embodiment, a guide component 3 is provided in the accommodating space of the housing 2. The guide component 3 is used to install the first magnetic component 5 and, under the drive of the drive component 4, drives the first magnetic component 5 to move, thereby changing the distance between the first magnetic component 5 and the second magnetic component 6.

[0048] The driving force applied by the driving component 4 is transmitted to the first magnetic component 5 through the guide component 3, thereby enabling the guide component 3 to guide the movement of the first magnetic component 5, ensuring the accuracy of its movement, and thus ensuring the fitting effect between the door 1 and the box.

[0049] In one embodiment, the guide assembly 3 includes a first guide structure 301 and a second guide structure 302. A first magnetic element 5 is disposed on the first guide structure 301, and the second guide structure 302 is fixed in the receiving space. The first guide structure 301 is slidably connected to the second guide structure 302 along the movement direction of the first magnetic element 5.

[0050] like Figure 2 , Figure 3 and Figure 5 As shown, the second guide structure 302 is a fixing block integrally formed with the inner wall of the housing 2; the first guide structure 301 is a guide seat slidably connected to the second guide structure 302. One side of the guide seat is provided with a mounting portion 3011 for mounting the first magnetic component 5. The mounting portion 3011 has a mounting hole with the same shape as the first magnetic component 5. For example, in this embodiment, the first magnetic component 5 is a cuboid permanent magnet, so the mounting hole is also cuboid, and the length of the mounting hole is less than the length of the permanent magnet, so that one end of the permanent magnet is exposed. Of course, the second guide structure 302 can also be fixed to the inner wall of the housing 2 by screws or adhesives; no specific limitation is made here.

[0051] As an alternative implementation, the drive assembly 4 can also be a telescopic rod or a hydraulic rod. The axial direction of the telescopic rod or hydraulic rod is consistent with the movement mode of the first magnetic member 5. Through the linear extension and retraction of the telescopic rod or hydraulic rod, the first magnetic member 5 is directly driven to move towards or away from the second magnetic member 6. The method is simpler. However, at this time, the length of the housing 2 along the movement direction of the first magnetic member 5 is larger, which occupies more space on the door 1. In addition, the transmission mode of the telescopic rod or hydraulic rod has the defect that the force transmission is easily affected by the external environment and fluctuates greatly.

[0052] The first guide structure 301 moves relative to the second guide structure 302 by the drive component 4, thereby driving the first magnetic component 5 to move toward or away from the second magnetic component 6. This can minimize the length of the housing 2 in the direction of movement of the first magnetic component 5, that is, reduce the space occupied by the housing 2 in this direction on the door body 1, and basically not affect the setting of other structures on the door body 1, thus reducing costs.

[0053] In one embodiment, the drive component 4 is a linear drive mechanism.

[0054] The reason for this arrangement is that the space in the door body 1 or other carrier used to install the door suction device is limited in the direction of movement of the first magnetic component 5, while the space in the direction perpendicular to the direction of movement is relatively large. Therefore, by setting a linear drive mechanism, the rotational motion input from the outside is converted into the linear motion of the first guide structure 301 relative to the second guide structure 302, so as to make reasonable use of the space inside the door body 1 and other carriers and avoid interference with other existing structures as much as possible.

[0055] In one embodiment, the linear drive mechanism includes a worm gear 401 and a worm 402 that are meshed together. One end of the worm 402 extends outside the receiving space to form a drive end. An adjusting screw 403 is provided on the worm gear 401. A first guide structure 301 is sleeved on the adjusting screw 403 to drive the first magnetic member 5 to move under the drive of the adjusting screw 403.

[0056] like Figures 3 to 5 As shown, the two ends of the worm gear 402 are respectively set on a pair of opposite sidewalls of the housing 2, and support holes are formed at corresponding positions on the sidewalls of the housing 2. The worm wheel 401 and the adjusting screw 403 are integrally formed, or they can be formed separately and then fixed. The journal at one end of the adjusting screw 403 is inserted into the support blind hole in the bottom wall of the housing 2 for fixation, so as to ensure that when the worm wheel 401 drives the adjusting screw 403 to rotate synchronously under the drive of the worm gear 402, the adjusting screw 403 will not undergo axial displacement, but will instead convert the rotational motion into linear motion of the first guide structure 301 relative to the second guide structure 302 through a threaded connection. In this embodiment, the first guide structure 301 is formed with an internal thread hole that matches the external thread of the adjusting screw 403, thereby realizing the conversion between rotational motion and linear motion.

[0057] The rotational motion of the worm gear 401 is converted into linear motion by the adjusting screw 403, which is coaxially arranged with the worm gear 401. Since one end of the adjusting screw 403 is fixed, the first guide structure 301 and the second guide structure 302 are slidably connected along the direction of movement of the first magnetic component 5. Therefore, the worm gear 401 can drive the first guide structure 301 to move only along the axial direction of the adjusting screw 403. The transmission of the worm gear 401 and worm 402 is smooth and reliable, realizing precise stepless adjustment of the gap between the first magnetic component 5 and the second magnetic component 6. Furthermore, due to the inherent reverse self-locking characteristics of the worm gear 401 and worm 402, the gap between the first magnetic component 5 and the second magnetic component 6 after adjustment will not change under long-term vibration and magnetic reaction, maintaining the long-term stability of the adjusted state.

[0058] As an alternative implementation, the positions of the worm gear 401 and the worm 402 can also be interchanged. That is, the output end of the worm 402 is directly connected to the first guide structure 301. By rotating the worm gear 401, the worm 402 is driven to move linearly, thereby driving the first magnetic component 5 to move towards or away from the second magnetic component 6. In this case, the adjusting screw 403 is not required. However, the housing 2 is still too long in the direction of movement of the first magnetic component 5, which occupies a large amount of space in that direction of the door body 1.

[0059] In one embodiment, the first guide structure 301 is provided with a slide rail 3012 or a guide groove 3021 arranged parallel to the axial direction of the adjusting screw 403, and the second guide structure 302 is provided with a guide groove 3021 or a slide rail 3012 arranged parallel to the axial direction of the adjusting screw 403, with the slide rail 3012 and the guide groove 3021 slidingly engaged.

[0060] like Figure 2 and Figure 5 As shown, in this embodiment, the first guide structure 301 is provided with a slide rail 3012, and the second guide structure 302 is provided with a guide groove 3021. The extending directions of both the slide rail 3012 and the guide groove 3021 are consistent with the movement direction of the first magnetic component 5. Of course, the positions of the slide rail 3012 and the guide groove 3021 can also be interchanged, and no specific restrictions are made here.

[0061] The sliding rail 3012 and the guide groove 3021 have a simple mating structure, are easy to process, and ensure the reliability of linear motion.

[0062] In one embodiment, the cross-sections of the slide rail 3012 and the guide groove 3021 are both "T" shaped or "I" shaped.

[0063] like Figure 2 and Figure 5As shown in this embodiment, the cross-sections of the slide rail 3012 and the guide groove 3021 are both "I" shaped. Of course, they can also be set to "T" shaped or other forms with certain guiding and limiting functions as needed. No specific restrictions are made here.

[0064] The “T” or “I” shaped slide rail 3012 and guide groove 3021 not only ensure linear motion and provide guidance, but also prevent the slide rail 3012 from detaching from the guide groove 3021, further ensuring the reliability of the installation.

[0065] In one embodiment, a sealing ring 7 is provided at the contact position between the drive end of the worm gear 402 and the housing 2, and the sealing ring 7 is flush with the outer surface of the housing 2.

[0066] Since one end of the worm gear 402 needs to penetrate the side wall of the housing 2, a through hole needs to be set at the corresponding position of the side wall. This will affect the overall sealing performance of the housing 2. Therefore, a sealing ring 7 is added at the through hole. In this embodiment, the sealing ring 7 is made of an elastic material, such as rubber, which can make the circumferential direction of the worm gear 402 tightly connected with the through hole on the housing 2.

[0067] The sealing ring 7 ensures the airtightness of the housing 2, completely isolating the entire device from the surrounding environment. This effectively prevents environmental influences, ensuring long-term operational reliability under complex working conditions and extending service life. The sealing ring 7 is flush with the outer surface of the housing 2, eliminating axial clearance in the worm gear 402 and ensuring reliable bidirectional fixation of the worm gear 402, resulting in smooth transmission without any slippage.

[0068] In one embodiment, the drive end of the worm gear 402 is further provided with an operating part 8, which is connected to the worm gear 402.

[0069] In this embodiment, the operating part 8 is a knob, and the inner side of the knob is provided with an irregular hole, such as a D-shaped hole. The shaft segment of the worm 402 is also a D-shaped shaft segment. Of course, the irregular hole can also be a triangular hole or a square hole, in which case the shaft segment of the worm 402 is consistent with it.

[0070] The operating part 8 is designed to allow the operator to hold the end of the worm 402 and apply driving force. The irregular hole is adapted to the shaft end of the worm 402, which can prevent the operating part 8 from rotating on its own without driving the worm 402 to rotate, thus ensuring the synchronous rotation of the operating part 8 and the worm 402.

[0071] The specific assembly method of the door catch device is as follows: First, press the permanent magnet into the mounting portion 3011 of the guide seat, ensuring proper assembly, i.e., one end of the permanent magnet is tightly against the bottom wall of the mounting portion 3011. Then, screw the threaded hole of the guide seat into the adjusting screw 403, forming a... Figure 4 The structure shown. Figure 4 The structure shown is installed into the housing 2 from top to bottom. At this time, the guide rail 3012 of the guide seat slides into the guide groove 3021 of the fixing block, and the bottom journal of the adjusting screw 403 is inserted into the support blind hole of the bottom wall of the housing 2 for fixation.

[0072] Next, support the journal at one end of the worm gear 402 in the bearing seat on the inner wall of the housing 2. Then, align the end cap 202 with the installation position of the housing 2, so that the journal at the other end of the worm gear 402 simultaneously falls into the corresponding support hole of the end cap 202. Use screws to initially tighten the end cap 202 to the housing 2. Manually rotate the worm gear 402 to check its correct meshing with the worm wheel 401 in the middle section of the adjusting screw 403, ensuring smooth transmission without jamming, and then fully tighten all screws to the specified torque.

[0073] Next, the sealing ring 7 is installed in the through hole of the worm gear 402 extending from the end cap 202, and is made to fit against the outer surface of the end cap 202.

[0074] Align the D-shaped hole on the inside of the knob with the D-shaped shaft section of the worm gear 402 and press it in until the internal elastic buckle of the knob makes a "click" sound. This indicates that the knob has been reliably inserted into the annular groove at the end of the worm gear 402 shaft, and the installation of the knob is complete.

[0075] Finally, align the buckles on the inside of the top cover 201 with the corresponding slots on the top of the housing 2, apply pressure until all the buckles make a "click" sound and lock in place, ensuring that the top cover 201 and the housing 2 fit tightly together, and complete the assembly.

[0076] On the other hand, a door body 1 is also provided, including a door catch device.

[0077] In one embodiment, a door catch device is disposed on the door body 1, and multiple such devices are spaced apart along the height direction of the door body 1.

[0078] like Figure 6 As shown, a central beam is provided in the center of the box. The central beam is usually made of iron, so no additional magnetic components are needed. The part of the central beam corresponding to the first magnetic component 5 can serve as the second magnetic component 6. If the part of the box corresponding to the first magnetic component 5 is made of a non-magnetic material, then a second magnetic component 6 needs to be provided separately to ensure the magnetic attraction of the door 1 to the box. Two doors 1 are symmetrically arranged on both sides of the central beam. Multiple door catches are provided at intervals along the height of the door 1. This is because the position of deformation of the door 1 is uncertain. Therefore, by setting multiple door catches, the gap can be adjusted according to the specific deformation position, so that the door 1 and the central beam can be completely fitted together.

[0079] The arrangement of multiple door suction devices along the height of the door 1 allows for precise control of the magnetic attraction force at different positions of the door 1 by adjusting the distance between the first magnetic element 5 and the second magnetic element 6 in each door suction device. This balances the closing force at each position of the door 1, thereby compensating for unevenness caused by the deformation and manufacturing tolerances of the door 1, achieving a flat and snug fit between the door 1 and the box, and ensuring the airtightness of the box.

[0080] In one embodiment, the door body 1 is provided with an installation groove, the inner side wall of the installation groove is provided with a slot, and the outer side wall of the housing 2 is provided with a buckle, which is adapted to engage and fix with the slot.

[0081] During assembly, align the clips on housing 2 with and push them into the pre-set mounting slots on door 1. The clips on housing 2 interact with the slots on the side wall of the mounting slots, and after hearing a "click," the housing 2 is initially positioned and fixed. Of course, the positions of the mounting slots and clips can also be interchanged, and no specific limitation is made here.

[0082] The combination of the slot and the buckle structure enables a reliable connection between the door catch device and the door body 1, ensuring that the door catch device does not shift during the foaming process of the door body 1. After foaming, the foam material itself covers the door catch device, further enhancing its installation strength and reliability, and making it easy to assemble and disassemble.

[0083] When a large indentation occurs in door body 1, away from the center beam, such as Figure 7 and Figure 8 As shown, the user rotates the knob at the target point clockwise. The knob drives the worm gear 402 to rotate synchronously through the D-shaped hole shaft structure. The worm gear 402 drives the meshing worm wheel 401 to rotate, which in turn causes the adjusting screw 403, which is coaxially fixed with the worm wheel 401, to rotate. Under the linear guidance of the threaded pair transmission and the I-shaped slide rail 3012 of the guide seat, the rotational motion of the screw is converted into the linear motion of the permanent magnet toward the central beam of the housing. The working magnetic gap between the permanent magnet and the central beam decreases. According to the physical characteristics of magnetic force and distance, that is, the magnetic attraction force increases rapidly and nonlinearly as the gap decreases, the magnetic attraction force at this local point increases significantly, thereby generating a greater closing auxiliary pulling force on the door 1, pulling the door 1 in the recessed area toward the central beam, achieving a flat and snug fit.

[0084] When the door 1 experiences a significant indentation near the housing, the user rotates the knob at the target point counterclockwise. This rotation is transmitted to the adjusting screw 403 via the worm gear pair. The screw's rotation drives the permanent magnet to retract away from the central beam of the housing under the guidance of the slide rail 3012 and guide groove 3021. The working magnetic gap between the permanent magnet and the central beam increases accordingly. Based on the physical characteristics of magnetic force and distance—that is, the magnetic attraction force decreases rapidly and nonlinearly as the gap increases—the magnetic attraction force at this local point rapidly decays. This operation effectively releases the excessive attraction force caused by the local deformation of the door 1, eliminating the interference phenomenon of closing too tightly and opening too forcefully, allowing the door 1 to achieve smooth closure and tight fit in this area with appropriate force.

[0085] On the other hand, a device is also provided, including a door body 1.

[0086] Because the gap between the door 1 and the box can be precisely adjusted by the movement of the first magnetic component 5 relative to the second magnetic component 6, the device has good sealing performance and is more reliable in use.

[0087] Beneficial effects: When a large indentation occurs in the door or cabinet body away from the cabinet or door body 1, the drive assembly 4 can drive the first magnetic component 5 to move towards the cabinet or door body 1, thereby bringing the first magnetic component 5 closer to the second magnetic component 6, i.e., reducing the distance between the first magnetic component 5 and the second magnetic component 6. According to the physical characteristics of magnetic force and distance, that is, the magnetic attraction force increases rapidly and nonlinearly as the gap decreases, the magnetic attraction force at this position will be significantly enhanced, thereby generating a greater closing auxiliary pulling force on the door or cabinet body 1, pulling the indented area of ​​the door or cabinet body 1 towards the cabinet or door body 1, and thus reducing the gap between the door body 1 and the cabinet body 1; when a large indentation occurs in the door or cabinet body towards the cabinet or door body 1... When there is a large indentation, the first magnetic component 5 can be driven by the drive assembly 4 to move away from the cabinet or door, thereby moving the first magnetic component 5 away from the second magnetic component 6, increasing the distance between the first magnetic component 5 and the second magnetic component 6. According to the physical characteristics of magnetic force and distance, the magnetic attraction force decreases rapidly and nonlinearly as the gap increases. Therefore, the magnetic attraction force at this location decreases rapidly, effectively releasing the excessive attraction force of the cabinet or door 1 caused by the local deformation of the door or cabinet. That is, the indented area of ​​the door or cabinet deforms away from the cabinet, thereby eliminating the interference phenomenon of the door closing too tightly and opening too forcefully. This allows the door 1 to achieve smooth closure and tight fit in this area with appropriate force. Compared with the prior art, this device has better sealing performance and is more reliable because the gap between the door 1 and the cabinet can be precisely adjusted by the movement of the first magnetic component 5 relative to the second magnetic component 6.

[0088] In one embodiment, the device is a refrigerator, and the door 1 includes a door liner, with a door catch device disposed on the door liner.

[0089] This door catch device can be applied to most devices with opening and closing doors, such as refrigerators, ovens, disinfection cabinets, or industrial cabinets, and has a wide range of applications. This embodiment only uses a refrigerator as an example for illustration and does not impose any specific limitations. Installing a door catch device on the refrigerator door can improve the fit between the door and the cabinet, ensuring airtightness.

[0090] In one embodiment, the refrigerator further includes a center beam, with the door suction device corresponding to the center beam of the refrigerator, and an installation space for the door seal component is reserved between the door suction device and the center beam.

[0091] This embodiment uses a refrigerator as an example, specifically a side-by-side refrigerator. Each side of the central beam of the refrigerator body has a door 1, and multiple door catches are spaced apart on each door corresponding to the position on the central beam. A certain distance is reserved between the door catches and the central beam for installing door sealing components at that location; therefore, the door catches are not placed on the outermost edge of the door. Furthermore, the sealed housing 2 effectively isolates the internal foam layer and low-temperature, humid air from the refrigerator, preventing condensation and ice buildup inside the refrigerator body that could cause mechanical jamming or corrosion, thus improving the lifespan of the equipment.

[0092] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A door catch device, suitable for installation on a door (1) or a box, characterized in that, The door catch device includes: The shell (2) has a receiving space; The drive component (4) is at least partially disposed in the receiving space; The first magnetic element (5) is disposed on the drive assembly (4) and is correspondingly disposed on the second magnetic element (6) disposed on the box or the door (1) so as to change the distance between the first magnetic element (5) and the second magnetic element (6) under the action of the drive assembly (4), thereby adjusting the magnetic attraction between them.

2. The door catch device according to claim 1, characterized in that, The accommodating space is provided with a guide component (3), and the driving component (4) is driven to the guide component (3). The first magnetic element (5) is provided on the guide component (3). The driving component (4) drives the guide component (3) to drive the first magnetic element (5) to move, change the distance between the first magnetic element (5) and the second magnetic element (6), and thus adjust the magnetic attraction between them.

3. The door catch device according to claim 2, characterized in that, The guide assembly (3) includes a first guide structure (301) and a second guide structure (302). The first magnetic element (5) is disposed on the first guide structure (301), and the second guide structure (302) is fixed in the accommodating space. The first guide structure (301) is slidably connected to the second guide structure (302) along the movement direction of the first magnetic element (5).

4. The door catch device according to claim 3, characterized in that, The drive component (4) is a linear drive mechanism.

5. The door catch device according to claim 4, characterized in that, The linear drive mechanism includes a worm gear (401) and a worm (402) that are meshed together. One end of the worm (402) extends outside the accommodating space to form a drive end. An adjusting screw (403) is provided on the worm gear (401). The first guide structure (301) is sleeved on the adjusting screw (403) to drive the first magnetic component (5) to move under the drive of the adjusting screw (403).

6. The door catch device according to claim 5, characterized in that, The first guide structure (301) is provided with a slide rail (3012) or guide groove (3021) arranged parallel to the axial direction of the adjusting screw (403), and the second guide structure (302) is provided with a guide groove (3021) or slide rail (3012) arranged parallel to the axial direction of the adjusting screw (403), and the slide rail (3012) and the guide groove (3021) are slidably engaged.

7. The door catch device according to claim 6, characterized in that, The cross-sections of the slide rail (3012) and the guide groove (3021) are both "T" shaped or "I" shaped.

8. The door catch device according to claim 5, characterized in that, A sealing ring (7) is provided at the contact position between the drive end of the worm gear (402) and the housing (2), and the sealing ring (7) is flush with the outer surface of the housing (2).

9. The door catch device according to claim 5, characterized in that, The worm (402) is further provided with an operating part (8) on its driving end, and the operating part (8) is connected to the worm (402).

10. The door catch device according to any one of claims 1 to 9, characterized in that, The door catch device is installed on the door body (1).

11. A door, characterized in that, Includes the door catch device as described in any one of claims 1 to 10.

12. The door body according to claim 11, characterized in that, The door catch device is disposed on the door body (1), and multiple devices are arranged at intervals along the height direction of the door body (1).

13. The door body according to claim 11, characterized in that, The door body (1) is provided with an installation groove, the inner side wall of the installation groove is provided with a slot, and the outer side wall of the housing (2) is provided with a buckle, which is adapted to be engaged and fixed with the slot.

14. A device, characterized in that, Includes the door body as described in any one of claims 11 to 13.

15. The device according to claim 14, characterized in that, The device is a refrigerator, the door (1) includes a door liner, and the door suction device is disposed on the door liner.

16. The device according to claim 15, characterized in that, The refrigerator also includes a central beam, and the door suction device is correspondingly arranged with the central beam of the refrigerator, with a reserved installation space for the door sealing component between the device and the central beam.

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