Door stopper system

Abstract

The utility model discloses a door stopper system. The door stopper system comprises a blocking piece shell, a rolling piece, a reset mechanism and a door stopper assembly. The blocking piece shell is provided with a first clamping groove and longitudinal sliding rails, and the two ends of the rolling piece are rotationally connected into the two longitudinal sliding rails. The reset mechanism provides upward reset force for the rolling piece. The door stopper assembly is assembled to the back side of the door body and provided with a clamping piece capable of rotationally extending out from the back side to the front side, and the clamping piece comprises a second clamping groove connected with the rolling piece in a clamped mode and an inclined face arranged towards the rolling piece. When the door stopper assembly is in contact with the blocking piece shell, the rolling piece rolls into the second clamping groove along the inclined surface to be clamped, so that rigid collision is avoided, and the possibility of noise and damage is reduced. The reset mechanism ensures that the rolling piece can return to the initial position when no external force exists, and the stability and reliability of the door stopper system are enhanced. Due to the design of the rolling piece and the reset mechanism, the door stopper system can better adapt to retraction of the clamping piece caused by external factors, and the possible problem that parts are collided and damaged in a traditional system is solved.

Description

Technical Field

[0001] This utility model relates to the field of door catch technology, and in particular to a door catch system. Background Technology

[0002] In existing technologies, door catches, as important components for fixing and buffering doors, are widely used in various buildings to ensure that doors can stably stop in a specific position when opening or closing, and to reduce direct collisions between the door and walls or other objects, thereby protecting the door and surrounding structures from damage. Traditional door catches typically employ a fixed snap-fit ​​design, and their shock absorption effect mainly relies on the rotation or retraction of the door catch structure behind the door.

[0003] However, when the door stop is not engaged with the latch, external factors such as wind pressure or human touch may cause the door stop structure to fail to properly reset and provide a buffering effect for the latch. As a result, the hard impact force between the two is relatively large, which can not only easily generate noise, but also damage the latch and reduce its service life. Utility Model Content

[0004] To overcome at least one of the defects described in the prior art, this utility model provides a door catch system. It can solve the problem of excessive rigid collision between the door catch stop and the door catch structure.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A door catch system includes: a stop housing, wherein the stop housing has a first engaging groove extending from the side wall to the top wall, and longitudinal slide rails are symmetrically arranged on the inner walls of both sides of the first engaging groove; a rolling element, wherein the two ends of the rolling element are respectively rotatably connected to the two longitudinal slide rails; a reset mechanism, wherein the reset mechanism is used to provide the rolling element with an upward reset force along the longitudinal slide rails; and a door catch assembly, wherein the door catch assembly is used to be assembled to the back side of a door body, wherein the side of the door catch assembly closer to the door body is defined as the back side of the door catch assembly, and the side farther from the door body is defined as the front side, and the door catch assembly is provided with a engaging member that can rotate and extend from the back side to the front side, the engaging member including a second engaging groove that engages with the rolling element and an inclined surface facing the rolling element, wherein when the engaging member is at one end of the back side of the door catch assembly, the door catch assembly contacts and abuts against the rolling element, allowing the rolling element to roll along the inclined surface into the second engaging groove for engagement.

[0007] By adopting the above solution and through the design of the rolling element, when the door catch assembly contacts the stop housing, the rolling element can roll along the inclined plane instead of undergoing a rigid collision. This greatly reduces the noise and possibility of damage caused by the collision. The reset mechanism ensures that the rolling element can return to its initial position when no external force is applied, increasing the stability and reliability of the door catch system. Due to the design of the rolling element and the reset mechanism, even if external factors cause the door catch assembly's latch to retract, the door catch system can better adapt and reset, reducing the problem of component collision damage that may occur in traditional systems.

[0008] Furthermore, a guide groove is formed through the lower part of the door catch assembly to the front side of the door catch assembly. The locking member is slidably disposed in the guide groove. When the locking member slides out to the front side of the guide groove, the locking member is in the open state. At this time, the second locking groove engages with the rolling member when the door is opened, thereby causing the rolling member to drive the locking member to move to the back side of the guide groove, so that the locking member is in the locked state. At this time, the locking member is located below the door catch assembly.

[0009] By adopting the above solution, the design of the guide rail groove and the snap-fit ​​component allows the door catch assembly to distribute stress more evenly when under force, avoiding damage caused by excessive local stress. The use of rolling components reduces wear caused by traditional rigid collisions and extends the service life of the door catch system.

[0010] Furthermore, the height of the rolling element after it descends is not higher than the lowest point of the inclined surface of the locking element in the locked state, so that the rolling element slides into the second locking groove.

[0011] By adopting the above solution, the rolling element can smoothly roll along the inclined plane to the position of the second locking groove, achieving smooth engagement with the locking groove. This avoids engagement failure or insecure engagement due to height mismatch.

[0012] Furthermore, the reset mechanism includes: a support member disposed inside the stop housing and abutting against the portion of the rolling member extending into the longitudinal slide rail; and a reset member disposed below the support member inside the stop housing, for providing an upward reset force to the support member.

[0013] By adopting the above scheme, the direct contact between the support and the rolling element ensures the stable movement of the rolling element within the longitudinal slide rail. This design prevents the rolling element from wobbling or shifting during movement, thus ensuring the overall stability of the door catch system. The reset element, located below the support, provides it with a continuous upward reset force. This design ensures that the rolling element automatically returns to its initial position when no external force is applied, increasing the reliability of the door catch system. The support and reset elements, as independent components, facilitate operation during installation, maintenance, and replacement.

[0014] Furthermore, the bottom of the stop housing includes a base plate, which is detachably connected to the stop housing.

[0015] By adopting the above solution, the detachable connection between the base plate and the baffle housing makes the parts inside the baffle housing easier to install and maintain, and allows users to disassemble and clean them according to actual needs, thus improving the practicality and convenience of the door stop baffle.

[0016] Furthermore, the longitudinal slide rail is a strip-shaped groove with its bottom end open, and the base plate covers the bottom end of the strip-shaped groove.

[0017] By adopting the above solution, the bottom end of the strip groove is covered by the base plate, which effectively limits the maximum sliding stroke of the rolling element, ensures the sliding limit of the rolling element in the groove, and improves the stability and durability of the door suction stop.

[0018] Further, the support member includes: a first support arm, which has a first abutting portion and a first supporting portion, wherein the first abutting portion abuts against the top wall inside the stopper housing, and the first supporting portion abuts against one end of the rolling member; a second support arm, which is symmetrically arranged with the first support arm, and has a second abutting portion and a second supporting portion, wherein the second abutting portion abuts against the top wall inside the stopper housing, and the second supporting portion abuts against the other end of the rolling member; and a connecting arm, which is used to connect the first support arm and the second support arm, and the connecting arm is disposed away from the first snap-fit ​​groove.

[0019] By adopting the above scheme, the design of the support component enables the rolling component to be stably supported when it is impacted. At the same time, the connecting arm avoids the first locking groove, ensuring smooth engagement between the door catch structure and the first locking groove, thus improving the reliability and practicality of the door catch stop.

[0020] Furthermore, the interior of the stop housing is recessed into the first snap-fit ​​groove to form a movable cavity, which is used to provide longitudinal movement space for the connecting arm.

[0021] By adopting the above solution, the design of the movable cavity provides sufficient space for the connecting arm to move, allowing the support to have a certain buffering margin when it is impacted, further reducing the hard impact force and improving the buffering effect of the door stop.

[0022] Furthermore, the rolling element includes a rotating body and a rod body, the rotating body being rotatably sleeved on the rod body, and the two ends of the rod body being respectively inserted into two longitudinal slide rails in the first snap-fit ​​groove.

[0023] By adopting the above scheme, the design of the rolling element enables the door stop to slide and rotate when impacted, effectively reducing the hard impact force. At the same time, the two ends of the rod are inserted into the longitudinal slide rail, ensuring the stable sliding of the rolling element within the slide rail, thus improving the buffering effect and stability of the door stop.

[0024] Furthermore, the reset member includes a first spring and a second spring, the upper end of the first spring abutting with the first abutting portion and the lower end of the first spring abutting with the base plate; the upper end of the second spring abutting with the second abutting portion and the lower end of the second spring abutting with the base plate.

[0025] By adopting the above scheme, the design of the reset component allows the support and rolling components to quickly return to their initial positions after being impacted, preparing for the next buffering action. At the same time, the symmetrical arrangement of the two springs ensures the uniformity of the reset force, improving the reset effect and stability of the door stop.

[0026] A door catch system includes a door body, a door catch assembly mounted on the back side of the door body, and a door catch stop for engaging with the door catch. The door catch assembly has a snap-fit ​​element that engages with the rolling element, and the snap-fit ​​element has an inclined surface on the side facing the rolling element.

[0027] By adopting the above scheme, the door catch system is designed to ensure stable fixation and buffering of the door when it is opened or closed. At the same time, the interlocking of the door catch assembly and the door catch stop ensures the stability and safety of the door, improves the practicality and reliability of the door catch system, and the beveled surface plays a certain guiding role, reducing rigid collisions between the door catch stop and the interlocking parts.

[0028] In summary, the door catch system provided by this utility model has the following technical effects:

[0029] 1. By introducing a rolling element design, when the door closer structure impacts the stop, the rolling element can slide and rotate along the longitudinal rail, effectively absorbing the impact energy and thus significantly reducing the hard impact force. This helps protect the door closer stop and door closer structure from damage, extending their service life;

[0030] 2. The sliding and rotating characteristics of the rolling elements provide a good buffering effect for the door catch structure, allowing the door to stop more smoothly in a specific position during closing or opening, reducing direct collisions between the door and the wall or other objects, and protecting the door and surrounding structure;

[0031] 3. The reset mechanism is designed to allow the rolling elements to quickly return to their initial position after an impact, preparing for the next buffering action. This rapid reset capability ensures the continuous and effective operation of the door closer, improving its reliability and stability.

[0032] 4. Reduced impacts and noise make door operation smoother and quieter. Simultaneously, the increased durability of the doorstop reduces the frequency of repairs and replacements, enhancing the user experience. The relatively simple design of the doorstop makes it easy to install and remove. This allows for convenient and quick repairs or replacements, reducing maintenance costs. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the baffle housing structure according to an embodiment of the present utility model;

[0034] Figure 2 This is a schematic diagram of the disassembly structure of the stop in an embodiment of the present utility model;

[0035] Figure 3 This is a schematic diagram of the uncompressed state of the rolling element in an embodiment of this utility model;

[0036] Figure 4 This is a schematic diagram of the rolling element in a compressed state according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the door catch assembly and the stop detachment structure according to an embodiment of the present utility model.

[0038] The meanings of the reference numerals in the attached drawings are as follows: 1. Stop housing; 11. First snap-fit ​​groove; 111. Longitudinal slide rail; 12. Movable cavity; 2. Support member; 21. First support arm; 211. First abutment part; 212. First support part; 22. Second support arm; 221. Second abutment part; 222. Second support part; 23. Connecting arm; 3. Reset member; 31. First spring; 32. Second spring; 4. Rolling member; 41. Rotating body; 42. Rod body; 5. Base plate; 6. Door catch assembly; 61. Snap-fit ​​member; 611. Second snap-fit ​​groove; 612. Inclined surface; 62. Guide rail groove. Detailed Implementation

[0039] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0040] To facilitate understanding of the embodiments of this utility model, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this utility model.

[0041] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0043] See Embodiment 1 of this utility model. Figures 1-5 As shown, a door catch system is disclosed, including a stop housing 1, a reset mechanism, a rolling element 4, and a door catch assembly 6. The stop housing 1 has a first engaging groove 11 extending from the side wall to the top wall. Longitudinal slide rails 111 are symmetrically arranged on the inner walls of both sides of the first engaging groove 11. The two ends of the rolling element 4 are rotatably connected to the two longitudinal slide rails 111 respectively. The reset mechanism provides an upward reset force for the rolling element 4 along the longitudinal slide rails 111. The door catch assembly 6 is assembled to the back side of a door. The side of the door catch assembly 6 closest to the door is designated as the back side, and the side furthest from the door is designated as the front side. The door catch assembly 6 is provided with a engaging element 61 that can rotatably extend from the back side to the front side. The engaging element 61 includes a second engaging groove 611 that engages with the rolling element 4 and a groove facing the... The inclined surface 612 of the rolling element 4 allows the door-attracting assembly 6 to contact and abut the rolling element 4 when the locking member 61 is at one end of the back side of the door-attracting assembly 6. This allows the rolling element 4 to roll along the inclined surface 612 and engage in the second locking groove 611. The design of the rolling element 4 ensures that when the door-attracting assembly 6 contacts the stop housing 1, the rolling element 4 can roll along the inclined surface 612 instead of undergoing a rigid collision. This significantly reduces noise and the possibility of damage from collisions. The reset mechanism ensures that the rolling element 4 returns to its initial position without external force, increasing the stability and reliability of the door-attracting system. Due to the design of the rolling element 4 and the reset mechanism, even if external factors cause the locking member 61 of the door-attracting assembly 6 to retract, the door-attracting system can better adapt and reset, reducing the potential for component collision damage in traditional systems.

[0044] It should be noted that the structure of the stop housing 1 includes, but is not limited to, a quadrangular prism, a triangular prism, or a column. In this embodiment 1, the structure of the stop housing 1 is columnar, and the reset mechanism includes a support member 2 and a reset member 3. The support member 2 is disposed inside the stop housing 1 and abuts against the portion of the rolling member 4 that extends into the longitudinal slide rail 111. The reset member 3 is disposed below the support member 2 inside the stop housing 1 and is used to provide an upward reset force for the support member 2. The direct abutment between the support member 2 and the rolling member 4 ensures the stable movement of the rolling member 4 within the longitudinal slide rail 111. This design prevents the rolling member 4 from shaking or shifting during movement, thereby ensuring the overall stability of the door catch system. The reset member 3 is located below the support member 2, providing it with a continuous upward reset force. This design ensures that the rolling member 4 can automatically return to its initial position when no external force is applied, increasing the reliability of the door catch system. The support member 2 and the reset member 3 are independent components, facilitating operation during installation, maintenance, and replacement.

[0045] Specifically, in this embodiment 1, a guide groove 62 is formed through the lower part of the door catch assembly 6 towards the front side of the door catch assembly 6. The locking member 61 is slidably disposed in the guide groove 62. When the locking member 61 slides out towards the front side of the guide groove 62, the locking member 61 is in the open state. At this time, the second locking groove 611 engages with the rolling member 4 when the door is opened, thereby causing the rolling member 4 to drive the locking member 61 to move towards the back side of the guide groove 62, so that the locking member 61 is locked. At this time, the locking member 61 is located below the door catch assembly 6. The cooperative design of the guide groove 62 and the locking member 61 allows the door catch assembly 6 to distribute stress more evenly when subjected to force, avoiding damage caused by excessive local stress. The use of the rolling member 4 reduces the wear caused by traditional rigid collisions and extends the service life of the door catch system. Preferably, the guide rail groove 62 is provided with a track that allows the snap-fit ​​member 61 to translate and rotate. The track includes a horizontal section near the back side and an inclined section that slopes upward towards the front side, so that the snap-fit ​​member 61 can rotate when sliding from the back side to the front side, thereby partially extending out of the guide rail groove 62.

[0046] It should be noted that the height of the rolling element 4 after it descends is not higher than the lowest point of the inclined surface 612 of the locking element 61 in the locked state, so that the rolling element 4 can slide into the second locking groove 611. This allows the rolling element 4 to smoothly roll along the inclined surface 612 to the position of the second locking groove 611, achieving successful engagement with the groove. This avoids engagement failure or insecure engagement due to height mismatch.

[0047] In some embodiments, to facilitate the connection and fixation of the stopper housing 1 to the bottom surface, a base plate 5 is provided at the bottom of the stopper housing 1. The base plate 5 is detachably connected to the stopper housing 1, and the base plate 5 is also provided with multiple screw holes for fixing to the ground. The detachable connection between the base plate 5 and the stopper housing 1 makes the parts inside the stopper housing 1 easier to install and maintain, and allows users to disassemble and clean it according to actual needs, improving the practicality and convenience of the door stopper.

[0048] In this embodiment 1, the support member 2 includes a first support arm 21, a second support arm 22, and a connecting arm 23. The connecting arm 23 connects the first support arm 21 and the second support arm 22. The height of the connecting arm 23 is lower than the height of the first support arm 21 and the second support arm 22, providing better accommodation space for the reset member 3. The interior of the stop member housing 1 is recessed into the first snap-fit ​​groove 11 to form a movable cavity 12. The movable cavity 12 provides longitudinal movement space for the connecting arm 23. The low position of the connecting arm 23 helps to compress the space of the movable cavity 12, avoiding affecting the snap-fit ​​with the door closer structure. This makes the support member 2 compatible with the internal space of the stop member housing 1. The design of the movable cavity 12 provides sufficient movement space for the connecting arm 23, allowing the support member 2 to have a certain buffering margin when impacted, further reducing the hard impact force and improving the buffering effect of the door closer stop member.

[0049] In some embodiments, the first support arm 21 is provided with a first abutting portion 211 and a first supporting portion 212. The top of the first abutting portion 211 abuts against the top wall inside the stop housing 1, and the bottom of the first abutting portion 211 abuts against the top of the reset member 3. The first supporting portion 212 abuts against one end of the rolling member 4. The second support arm 22 is symmetrically arranged with the first support arm 21. The second support arm 22 is provided with a second abutting portion 221 and a second supporting portion 222. The top of the second abutting part 221 abuts against the top wall inside the stop housing 1, while the bottom of the second abutting part 221 abuts against the top of another reset part 3. The second supporting part 222 abuts against the other end of the rolling part 4, and the connecting arm 23 is set to avoid the first snap-fit ​​groove 11. The design of the support part 2 enables the rolling part 4 to be stably supported when it is impacted. At the same time, the connecting arm 23 is set to avoid the first snap-fit ​​groove 11, which ensures the smooth snap-fit ​​between the door stop structure and the first snap-fit ​​groove 11, and improves the reliability and practicality of the door stop.

[0050] In some embodiments, the reset member 3 includes a first spring 31 and a second spring 32. The upper end of the first spring 31 abuts against the first abutting portion 211, and the lower end of the first spring 31 abuts against the base plate 5. The upper end of the second spring 32 abuts against the second abutting portion 221, and the lower end of the second spring 32 abuts against the base plate 5. In other embodiments, the reset member 3 may be other elastic structures, which are not specifically limited in this embodiment. The design of the reset member 3 allows the support member 2 and the rolling member 4 to quickly return to their initial positions after being impacted, preparing for the next buffering action. At the same time, the symmetrical arrangement of the two springs ensures the uniformity of the reset force, improving the reset effect and stability of the door stop.

[0051] In this embodiment 1, the longitudinal slide rail 111 is a strip-shaped slide groove with the bottom end of the strip-shaped slide groove open. The bottom end of the strip-shaped slide groove is covered by the bottom plate 5, which effectively limits the maximum sliding stroke of the rolling element 4, ensures the sliding limit of the rolling element 4 in the slide groove, and improves the stability and durability of the door suction stop.

[0052] In some embodiments, in order to improve the contact stability between the support member 2 and the reset member 3, the first abutment portion 211 and the second abutment portion 221 are two abutment pieces bent in opposite directions. The abutment pieces are parallel to the top wall of the stop member housing 1, so that the reset member 3 can be provided with a stable support effect. At the same time, the design of the abutment pieces makes the connection between the support member 2 and the stop member housing 1 more secure. In addition, the parallelism between the abutment pieces and the top wall of the stop member housing 1 ensures that the support member 2 can be evenly stressed when it is impacted, thereby improving the stability and reliability of the door stop member.

[0053] In this embodiment 1, the rolling element 4 includes a rotating body 41 and a rod 42. The rotating body 41 is rotatably sleeved on the rod 42, and both ends of the rod 42 are respectively inserted into two longitudinal slide rails 111 within the first locking groove 11. The design of the rolling element 4 allows the door closer to slide and rotate when impacted, effectively reducing the hard impact force. Simultaneously, the insertion of both ends of the rod 42 into the longitudinal slide rails 111 ensures stable sliding of the rolling element 4 within the slide rails, improving the buffering effect and stability of the door closer. In other embodiments, the structure of the rolling element 4 is not specifically limited, as long as the above effects are achieved.

[0054] The working principle of a door catch system is as follows: When the second locking groove 611 engages with the rolling element 4, the locking element 61 rotates due to the pushing force of the door's opening inertia, causing the second locking groove 611 to face the bottom surface. The rolling element 4 has an upward pushing force from the reset element 3, thus the two engage with each other to maintain a relatively stable open door state. When the door closes, the user drives the door to disengage from the rolling element 4, and the rolling element 4 drives the locking element 61 to rotate and extend towards the front of the door catch assembly 6, preparing for the next engagement of the second locking groove 611 with the rolling element 4.

[0055] When the door is opened, the latching component 61 is directly facing the bottom surface due to external force. At this time, the side of the latching component 61 facing the rolling element 4 has an inclined surface 612. The inclined surface 612 allows the rolling element 4 to roll while compressing the reset component 3 downward, thus smoothly entering the second latching groove 611 to achieve the latching effect. This avoids a hard collision with the rolling element 4 in this state and prevents damage to the stop component. Therefore, the design of this door catch system ensures stable fixation and buffering of the door body when opening or closing. At the same time, the cooperation and latching between the door catch assembly 6 and the door catch stop component ensures the stability and safety of the door body, improving the practicality and reliability of the door catch system.

[0056] In summary, the door catch system provided by this utility model has the following technical effects:

[0057] 1. By introducing the rolling element 4, when the door closer structure impacts the stopper, the rolling element 4 can slide and rotate along the longitudinal slide rail 111, effectively absorbing the impact energy and thus significantly reducing the hard impact force. This helps protect the door closer stopper and door closer structure from damage and extends their service life;

[0058] 2. The sliding and rotating characteristics of the rolling element 4 provide a good buffering effect for the door catch structure, so that the door can stay in a specific position more smoothly during closing or opening, reducing direct collisions between the door and the wall or other objects, and protecting the door and surrounding structure;

[0059] 3. The reset mechanism is designed so that the rolling element 4 can quickly return to its initial position after being impacted, preparing for the next buffering action. This rapid reset capability ensures the continuous and effective operation of the door stop, improving its reliability and stability;

[0060] 4. Reduced impacts and noise make door operation smoother and quieter. Simultaneously, the increased durability of the doorstop reduces the frequency of repairs and replacements, enhancing the user experience. The relatively simple design of the doorstop makes it easy to install and remove. This allows for convenient and quick repairs or replacements, reducing maintenance costs.

[0061] 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.

Claims

1. A door catch system, characterized in that, include: The stop housing (1) has a first snap-fit ​​groove (11) extending from the side wall to the top wall. The inner walls of the first snap-fit ​​groove (11) are symmetrically provided with longitudinal slide rails (111). Rolling element (4), the two ends of which are rotatably connected to the two longitudinal slide rails (111); A reset mechanism is provided for providing the rolling element (4) with an upward reset force along the longitudinal slide rail (111); A door catch assembly (6) is used to assemble onto the back side of a door. The side of the door catch assembly (6) closer to the door is defined as the back side of the door catch assembly (6), and the side farther from the door is defined as the front side. The door catch assembly (6) is provided with a snap-fit ​​member (61) that can rotate and extend from the back side to the front side. The snap-fit ​​member (61) includes a second snap-fit ​​groove (611) that snaps into the rolling member (4) and an inclined surface (612) that faces the rolling member (4). When the snap-fit ​​member (61) is at one end of the back side of the door catch assembly (6), the door catch assembly (6) contacts and abuts against the rolling member (4), allowing the rolling member (4) to roll along the inclined surface (612) into the second snap-fit ​​groove (611) and snap into place.

2. A door catch system according to claim 1, characterized in that, A guide groove (62) is formed through the lower part of the door catch assembly (6) to the front side of the door catch assembly (6). The latching member (61) is slidably disposed in the guide groove (62). When the latching member (61) slides out to the front side of the guide groove (62), the latching member (61) is in the open state. At this time, the second latching groove (611) engages with the rolling member (4) when the door is opened, thereby causing the rolling member (4) to drive the latching member (61) to move to the back side of the guide groove (62), so that the latching member (61) is locked. At this time, the latching member (61) is below the door catch assembly (6).

3. A door catch system according to claim 2, characterized in that, The height of the rolling element (4) after it descends is not higher than the lowest point of the inclined surface (612) of the locking element (61) in the locked state, so that the rolling element (4) slides into the second locking groove (611).

4. A door catch system according to claim 1, characterized in that, The reset mechanism includes: Support member (2), the support member (2) is disposed inside the stop housing (1) and abuts against the part of the rolling member (4) that extends into the longitudinal slide rail (111); A reset member (3) is disposed below the support member (2) inside the stop member housing (1) and is used to provide an upward reset force for the support member (2).

5. A door catch system according to claim 4, characterized in that, The bottom of the baffle housing (1) includes a base plate (5), which is detachably connected to the baffle housing (1).

6. A door catch system according to claim 5, characterized in that, The longitudinal slide rail (111) is a strip-shaped groove with the bottom end of the strip-shaped groove open, and the bottom plate (5) covers the bottom end of the strip-shaped groove.

7. A door catch system according to claim 5, characterized in that, The support member (2) includes: The first support arm (21) is provided with a first abutting part (211) and a first supporting part (212). The first abutting part (211) abuts against the top wall inside the stop housing (1), and the first supporting part (212) abuts against one end of the rolling element (4). The second support arm (22) is symmetrically arranged with the first support arm (21). The second support arm (22) is provided with a second abutting part (221) and a second supporting part (222). The second abutting part (221) abuts against the top wall inside the stop housing (1), and the second supporting part (222) abuts against the other end of the rolling element (4). A connecting arm (23) is used to connect the first support arm (21) and the second support arm (22), and the connecting arm (23) is disposed away from the first snap-fit ​​groove (11).

8. A door catch system according to claim 7, characterized in that, The inside of the retainer housing (1) is recessed into the first snap-fit ​​groove (11) to form a movable cavity (12), which is used to provide longitudinal movement space for the connecting arm (23).

9. A door catch system according to claim 1, characterized in that, The rolling element (4) includes a rotating body (41) and a rod (42). The rotating body (41) is rotatably sleeved on the rod (42). The two ends of the rod (42) are respectively inserted into two longitudinal slide rails (111) in the first snap-fit ​​groove (11).

10. A door catch system according to claim 7, characterized in that, The reset component (3) includes a first spring (31) and a second spring (32). The upper end of the first spring (31) abuts against the first abutting part (211), and the lower end of the first spring (31) abuts against the base plate (5). The upper end of the second spring (32) abuts against the second abutting part (221), and the lower end of the second spring (32) abuts against the base plate (5).

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