Locking structure of a telescopic screening device

Abstract

The technical scheme belongs to the technical field of retractable door bars and specifically relates to a locking structure of a retractable shielding device, which comprises a main rod body, a shaft connecting rod and shielding cloth wound on the main rod body, the main rod body is rotatably connected to the shaft connecting rod, the stretching of the shielding cloth can pull the main rod body to rotate around its own axis, and the locking structure comprises a fixing pin fixed to the end of the main rod body, the shaft connecting rod is connected to the fixing pin, and the fixing pin is provided with a limiting groove; a locking cap is arranged on the fixing pin, the locking cap is recessed with a locking groove along the edge, the locking cap is provided with a limiting part, the limiting groove is matched with the limiting part, the limiting part is axially clamped in the limiting groove, and the shaft connecting rod is limited in the locking groove. The plug-in structure makes the main rod body and the shaft connecting rod be in a relative locking state, the rotation of the main rod body is limited by the plug-in locking cap on the top, the shielding cloth cannot continue to stretch, and the overall durability of the product is improved.

Description

Technical Field

[0001] This technical solution relates to the field of telescopic gate technology, and specifically refers to a locking structure for a telescopic shielding device. Background Technology

[0002] Telescopic devices are retractable barriers that can be extended or retracted. Common forms include telescopic curtains (or roller blinds) and telescopic gates. They can be quickly deployed to achieve functions such as space separation, blocking sightlines, and obstructing passage, thereby preventing or isolating animals and children from entering or leaving the area and improving the protective effect.

[0003] For example, Chinese patent CN101147649A discloses a telescopic convenient sunshade curtain, with a fixed frame at each end. An air suction cup is installed on the outer horizontal bar of the fixed frame and is movably connected. The air suction cup can be attached to the glass. A plastic sleeve is installed on the inner horizontal bar of the fixed frame and is movably fitted. A curtain is fixedly connected to the plastic sleeve. When pulled open, the curtain extends, and when released, it automatically retracts. When the curtain is retracted, it is rolled into a tube shape for easy storage.

[0004] The aforementioned retractable sunshade curtain, when unfolded as a protective barrier, restricts passage and prevents pets or young children from leaving the room. However, due to the free movement of pets and young children, if they are impacted, the curtain lacks an effective restraint mechanism and is easily stretched. When excessive stretching exceeds the normal stress range of the curtain and plastic sleeve, it can easily lead to structural damage such as tearing of the curtain, deformation of the sleeve, or detachment of the connection points. This results in low product durability, posing a risk of use and poor safety. Summary of the Invention

[0005] To address the issue that excessive stretching of curtain fabric can easily damage the product, resulting in low durability and poor safety, this technical solution provides a locking structure for a telescopic shielding device.

[0006] The purpose of this technical solution is achieved as follows:

[0007] A locking structure for a telescopic shielding device includes a main rod, a shaft connecting rod, and a baffle wrapped around the main rod. The main rod is rotatably connected to the shaft connecting rod, and the extension of the baffle can pull the main rod to rotate around its own axis. The device also includes a locking structure comprising:

[0008] A fixing pin is fixed to the end of the main rod body, the shaft connecting rod is connected to the fixing pin, and the fixing pin is provided with a limiting groove;

[0009] A locking cap is provided on the fixing pin. The locking cap has a locking groove recessed along its edge. The locking cap has a limiting part. The limiting groove is adapted to the limiting part. The limiting part is axially engaged in the limiting groove, so that the shaft connecting rod is limited in the locking groove. The main rod body and the shaft connecting rod are in a relatively locked state.

[0010] Through the above technical solution, when the locking structure of a telescopic shielding device is in normal use, the main rod is suspended at a designated position through the shaft connecting rod. External force pulls the shield cloth to extend it. The shield cloth pulls the main rod to rotate around its own axis, realizing the normal extension and retraction of the shield cloth. When the shield cloth is extended to the required length, the operator aligns the locking groove of the locking cap with the shaft connecting rod, and then aligns and inserts the limiting part of the locking cap into the locking groove. The locking cap is fixed coaxially with the main rod. When the main rod rotates subsequently, the opposite groove sidewall of the locking groove along the direction of rotation will directly abut against the shaft connecting rod, thereby restricting the further rotation of the main rod and putting the main rod and shaft connecting rod into a relatively locked state. This effectively prevents the shield cloth from over-extending, reduces the tensile stress borne by the shield cloth due to excessive traction, and improves the overall durability of the product.

[0011] Preferably, multiple limiting grooves are provided along the circumference of the fixing pin, and partition portions are formed between adjacent limiting grooves. Each limiting portion is provided with a relief groove corresponding to a partition portion. The limiting portion is axially engaged in multiple limiting grooves, and the partition portion is correspondingly engaged in the corresponding relief groove.

[0012] Through the above technical solution, based on the fact that the main rod will be in any position after rotation, the limiting groove is divided into multiple circumferentially distributed grooves. The limiting part can be selected to fit into different combinations of limiting grooves to improve the degree of freedom. The distributed meshing structure formed by multiple limiting parts and limiting grooves increases the locking contact points, expands the rotation bearing resistance, can resist greater torque, and makes the locking state more stable, thus improving stability.

[0013] Preferably, there are two fixing pins, which are respectively fixed to both ends of the main rod.

[0014] With the above technical solution, locking caps can be installed on the fixing pins at both ends, which is not restricted by the forward or reverse direction of the main rod, thus improving practicality; the rigid constraint on both sides balances the force at both ends of the main rod, further improving the torsional stiffness of the main rod.

[0015] Preferably, the shaft connecting rod includes a rod body and hinged portions bent at both ends of the rod body, and the two fixing pins are respectively provided with hinged holes for the two hinged portions to be inserted.

[0016] With the above technical solution, the bent hinged parts at both ends of the shaft connecting rod are respectively embedded in two hinged holes. The hinged parts can move freely in the hinged holes to form a free rotation pair, and restrict the separation of the two, so as to realize smooth relative rotation between the main rod and the shaft connecting rod.

[0017] Preferably, the shaft connecting rod is provided with an elastic element, the elastic element is sleeved on the hinge part, one end of the elastic element is fixed to the end of the hinge part that protrudes from the fixing pin, and the other end is fixed to the corresponding end of the fixing pin;

[0018] The fixing pin has a clearance groove along its edge, and the hinge part is embedded in the hinge hole through the clearance groove. The elastic force of the elastic element makes the hinge part tend to fit into the hinge hole.

[0019] Through the above technical solution, the clearance groove on the edge of the fixed pin serves as the assembly channel for the hinge. After the hinge is pulled, it is inserted into the hinge hole through the clearance groove. During this process, the elastic element at the other end is compressed, simplifying the assembly path and improving the efficiency of assembly production. The elastic element of the hinge on one side continuously applies axial preload, so that the hinge always tends to fit into the hinge hole, reducing the axial movement of the rotating pair and improving stability.

[0020] Preferably, one end of the baffle is fixed to the main rod, and the other end of the baffle is fixed with a side tie rod.

[0021] With the above technical solution, users can simultaneously drive the baffle to extend by pulling the side rod horizontally, while simultaneously pulling the main rod to rotate around the axis, ensuring that the tensile force is always evenly distributed along the baffle plane.

[0022] Preferably, the side pull rod is provided with a hanging ring, which cooperates with the shaft connecting rod to be hung on the hook respectively.

[0023] The above technical solution suspends the shaft connecting rod on the hook. After pulling the side pull rod to extend the curtain, the hanging ring is also suspended on the hook on the opposite side, forming a double independent suspension structure. This maintains the integrity of the curtain shape and enables quick deployment and use.

[0024] Preferably, the fixing pin has a plurality of snap-fit ​​protrusions distributed circumferentially along the outer wall, and a snap-fit ​​groove is formed between adjacent snap-fit ​​protrusions. The main rod body has corresponding snap-fit ​​protrusions protruding along the inner wall, and the snap-fit ​​protrusions are fitted into the snap-fit ​​grooves one by one.

[0025] Through the above technical solution, the circumferentially distributed snap-fit ​​protrusions of the fixing pin are precisely fitted into the snap-fit ​​groove to form a circumferential mechanical interlock, thereby realizing the installation and fixation of the fixing pin at the end of the main rod.

[0026] Preferably, the locking cap has a through hole for the hanging rope to pass through.

[0027] With the above technical solution, the locking cap needs to be removed when the main rod rotates freely. One end of the hanging rope is passed through the hole and tied to the locking cap, and the other end is tied to the fixing pin. The hanging rope storage ensures that the locking cap is readily available when not in use, without the need for separate storage, reducing the risk of losing small parts and ensuring the integrity of the device.

[0028] The key and beneficial technical effects of this technical solution compared to existing technologies are:

[0029] 1. This technical solution uses the limiting part of the locking cap to be inserted into the limiting groove of the fixing pin. The locking cap, the fixing pin and the main rod are coaxially fixed, which limits the shaft connecting rod in the locking groove. When the main rod rotates, the locking groove abuts against the shaft connecting rod on the opposite side walls. The main rod and the shaft connecting rod enter a relatively locked state, which restricts the rotation of the main rod. The baffle cannot continue to extend, which improves the tear resistance of the baffle and the overall durability of the product.

[0030] 2. This technical solution has multiple limiting slots arranged circumferentially along the fixed pin, and multiple limiting parts are also arranged. When multiple limiting parts are engaged with multiple limiting slots, the partition parts are engaged in the corresponding clearance slots. The distributed meshing structure increases the locking contact points, expands the rotation bearing resistance, can resist greater torque, and makes the locking state more stable, thus improving stability. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0032] Figure 2 This is one of the partial explosion diagrams of this embodiment;

[0033] Figure 3 This is the second schematic diagram of a partial explosion in this embodiment;

[0034] Figure 4 This is a partial explosion diagram of the locking structure in the embodiment;

[0035] Figure 5 This is one of the partial cross-sectional schematic diagrams of this embodiment;

[0036] Figure 6 This is the second partial cross-sectional view of this embodiment.

[0037] Reference numerals: 1. Main rod; 2. Shaft connecting rod; 21. Rod body; 22. Hinge part; 3. Sheath; 4. Locking structure; 41. Fixing pin; 42. Locking cap; 5. Limiting groove; 6. Limiting part; 7. Locking groove; 8. Partition part; 9. Clearance groove; 10. Hinge hole; 11. Clearance groove; 12. Side tie rod; 13. Hanging ring; 14. Snap-fit ​​protrusion; 15. Snap-fit ​​groove; 16. Snap-fit ​​protrusion; 17. Through hole; 18. Elastic element; 19. Limiting protrusion ring. Detailed Implementation

[0038] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0039] Example:

[0040] See Figure 1 A locking structure for a telescopic shielding device includes a main rod 1, a shaft connecting rod 2, and a baffle 3. The main rod 1 is hollow and has a long tubular structure. The main rod 1 is rotatably connected to the shaft connecting rod 2. The baffle 3 is wrapped around the main rod 1. The baffle 3 can be made of mesh gauze, canvas, or plastic film, etc. One end of the baffle 3 is fixed to the main rod 1, and the other end is fixed to a side pull rod 12. Two hanging rings 13 are fitted on the side pull rod 12. Hooks are pre-set on the wall. During installation, the side pull rod 12 is first suspended on the hook on one side of the wall for initial positioning. Then, the side pull rod 12 is pulled outward to unfold the baffle 3, while the main rod 1 is pulled to rotate around its own axis, thereby releasing more of the baffle 3. The two hanging rings 13 on the side pull rod 12 are respectively hooked onto the corresponding hooks pre-set on the other side of the wall, thereby achieving double-sided fixed installation and normal use of the baffle 3.

[0041] See Figure 3 , Figure 4 and Figure 5 It also includes a locking structure 4, which includes a fixing pin 41 and a locking cap 42. There are two fixing pins 41, which are respectively embedded in the two ends of the main rod body 1 for fixation. Both fixing pins 41 have a limiting protrusion ring 19 protruding along the circumference, and both fixing pins 41 have a number of snap-fit ​​protrusions 14 protruding along the outer wall circumferentially. A snap-fit ​​groove 15 is formed between adjacent snap-fit ​​protrusions 14. A number of snap-fit ​​protrusions 16 protruding along the inner wall of the tube hole of the main rod body 1 are correspondingly protruding. The number of snap-fit ​​protrusions 16 is less than or equal to the number of snap-fit ​​grooves 15. During assembly, the fixing pin 41 is inserted into the tube hole of the main rod body 1. The snap-fit ​​grooves 15 on the fixing pin 41 need to be accurately fitted one by one with the snap-fit ​​protrusions 16 on the inner wall of the main rod body 1 to limit the fixing pin 41 so that it cannot rotate circumferentially relative to the main rod body 1 after installation. The limiting protrusion ring 19 abuts against the corresponding end of the main rod body 1 to axially limit and prevent excessive embedding.

[0042] The fixing pin 41 at the first end has a relief groove 11 along its edge, and the fixing pin 41 at the other second end has a positioning pin extending from one end along the insertion direction. Both fixing pins 41 have hinge holes 10. The shaft connecting rod 2 includes a rod body 21 and a hinge part 22. The hinge parts 22 at both ends are bent into a U-shape relative to the rod body 21. The hinge parts 22 at both ends are embedded into the hinge holes 10 at both ends to form a rotating pair. There is a gap between the rod body 21 and the main rod body 1 to provide space for the baffle 3 to be rolled up or unfolded.

[0043] The fixing pin 41 has a limiting groove 5 located on the outer end face of the fixing pin 41 opposite to its mating direction with the main rod body 1. Multiple limiting grooves 5 are provided circumferentially along the fixing pin 41. In this embodiment, five limiting grooves 5 are evenly distributed. A partition portion 8 is formed between adjacent limiting grooves 5. The fixing pin 41 extends a limiting portion 6 corresponding to the limiting groove 5. The limiting portion 6 has a relief groove 9 corresponding to the partition portion 8. A locking groove 7 is recessed along the edge of the limiting portion 6, allowing one end to pass through. During assembly, the locking groove 7 is aligned with the position of the hinge portion 22, and the limiting portion 6 is inserted into the limiting groove 5. Simultaneously, the partition portions 8 are correspondingly embedded into the relief grooves 9, allowing the locking cap 42 to be fitted into the fixing pin. 41. The hinge 22 is confined within the locking groove 7. When the locking cap 42 rotates with the main rod 1 and the fixing pin 41, the relative inner wall of the locking groove 7 abuts against the hinge 22, and the main rod 1 and the shaft connecting rod 2 are in a relatively locked state, and relative rotation cannot occur. Alternatively, one of the two components, the fixing pin 41 and the locking cap 42, is provided with a snap-fit ​​part, and the other component is provided with a corresponding locking part. Both the snap-fit ​​part and the locking part are protruding, and the snap-fit ​​part and the locking part fit together and abut against each other. The snap-fit ​​part or the locking part can also be provided as a locking groove, which has the same effect and further improves the firmness of the insertion and engagement between the fixing pin 41 and the locking cap 42.

[0044] The locking cap 42 has a through hole 17. One end of the lanyard passes through this through hole 17 and is securely tied to the locking cap 42. The other end can be tied to the fixing pin 41, so that when the locking cap 42 is not in use, it can be removed from the fixing pin 41. The lanyard can always keep it connected to the main body of the device, making it easy to carry the locking cap 42 and preventing it from being lost after disassembly.

[0045] The shaft connecting rod 2 is provided with an elastic element 18, wherein the hinge portion 22 at one end is longer than the other end, and the longer hinge portion 22 extends through its corresponding fixing pin 41. The fixing pin 41 should have the aforementioned positioning pin. The elastic element 18 is sleeved on the hinge portion 22. One end of the elastic element 18 is fixed to the positioning pin of the corresponding fixing pin 41, and the other end is fixed to the end of the hinge portion 22. The fixing method can be snap-fit ​​or adhesive. During assembly, the hinge portion 22 with the elastic element 18 is pre-inserted into the hinge hole 10 of the corresponding fixing pin 41, and then inserted into the main rod body 1 together with the fixing pin 41. The hinge portion 22 at the other end is engaged into the corresponding fixing pin 41 through the clearance groove 11. By pulling the shaft connecting rod 2, the elastic element 18 is compressed, and the hinge portion 22 moves and engages into the hinge hole 10. The elastic force of the elastic element 18 makes the hinge portion 22 tend to fit into the hinge hole 10.

[0046] The specific work process of this plan is as follows:

[0047] This technical solution involves suspending the main rod 1 at a designated position via the shaft connecting rod 2. External force pulls the baffle 3 to extend it, causing the baffle 3 to pull the main rod 1 to rotate around its own axis, thus achieving normal extension and retraction of the baffle 3. When the baffle 3 extends to the required length, the operator aligns the locking groove 7 of the locking cap 42 with the shaft connecting rod 2, and then aligns and inserts the limiting part 6 of the locking cap 42 into the locking groove 7. The locking cap 42 is coaxially fixed with the main rod 1. When the main rod 1 rotates subsequently, the opposite groove sidewall of the locking groove 7 along the direction of rotation will directly abut against the shaft connecting rod 2, and the main rod 1 and the shaft connecting rod 2 will enter a relatively locked state. The top-inserted locking cap 42 restricts further rotation of the main rod 1, effectively preventing the baffle 3 from over-extending, reducing the tensile stress borne by the baffle 3 due to excessive traction, and improving the overall durability of the product.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. A locking structure for a telescopic shielding device, comprising a main rod (1), a shaft connecting rod (2), and a baffle (3) wound around the main rod (1), wherein the main rod (1) is rotatably connected to the shaft connecting rod (2), and the extension of the baffle (3) can pull the main rod (1) to rotate around its own axis, characterized in that, It also includes a locking structure (4), which comprises: A fixing pin (41) is fixed to the end of the main rod (1), and the shaft connecting rod (2) is connected to the fixing pin (41). The fixing pin (41) is provided with a limiting groove (5). A locking cap (42) is provided on the fixing pin (41). The locking cap (42) has a locking groove (7) recessed along its edge. The locking cap (42) has a limiting part (6) adapted to the limiting groove (5). The limiting part (6) is inserted into the limiting groove (5) so that the shaft connecting rod (2) is limited in the locking groove (7). The main rod body (1) and the shaft connecting rod (2) are in a relatively locked state.

2. The locking structure of the telescopic shielding device according to claim 1, characterized in that: The limiting groove (5) is provided in multiple ways along the circumference of the fixing pin (41). A partition part (8) is formed between adjacent limiting grooves (5). The limiting part (6) is provided with a relief groove (9) corresponding to the partition part (8). The limiting part (6) is axially embedded in the multiple limiting grooves (5), and the partition part (8) is correspondingly embedded in the corresponding relief groove (9).

3. The locking structure of the telescopic shielding device according to claim 1, characterized in that: Two fixing pins (41) are provided, and the two fixing pins (41) are respectively fixed to both ends of the main rod (1).

4. The locking structure of the telescopic shielding device according to claim 3, characterized in that: The shaft connecting rod (2) includes a rod body (21) and hinge parts (22) bent into shape at both ends of the rod body (21). The two fixing pins (41) are respectively provided with hinge holes (10) for the two hinge parts (22) to be inserted.

5. The locking structure of the telescopic shielding device according to claim 4, characterized in that: The shaft connecting rod (2) is provided with an elastic element (18), the elastic element (18) is sleeved on the hinge part (22), one end of the elastic element (18) is fixed to the end of the hinge part (22) that passes through the fixing pin (41), and the other end is fixed to the corresponding end of the fixing pin (41); The fixing pin (41) has a relief groove (11) along its edge, and the hinge part (22) is embedded in the hinge hole (10) through the relief groove (11). The elastic force of the elastic element (18) makes the hinge part (22) tend to fit into the hinge hole (10).

6. The locking structure of the telescopic shielding device according to claim 1, characterized in that: One end of the baffle (3) is fixed to the main rod (1), and the other end of the baffle (3) is fixed with a side tie rod (12).

7. The locking structure of the telescopic shielding device according to claim 6, characterized in that: The side pull rod (12) is provided with a hanging ring (13), which cooperates with the shaft connecting rod (2) to be hung on the hook respectively.

8. The locking structure of the telescopic shielding device according to claim 1, characterized in that: The fixing pin (41) has several snap-fit ​​protrusions (14) distributed circumferentially along the outer wall. A snap-fit ​​groove (15) is formed between adjacent snap-fit ​​protrusions (14). The main rod (1) has corresponding snap-fit ​​protrusions (16) protruding along the inner wall. The snap-fit ​​protrusions (16) are fitted into the snap-fit ​​grooves (15) one by one. The fixing pin (41) has a limiting protrusion (19) protruding along the circumferential side. The limiting protrusion (19) abuts against the end of the main rod (1).

9. The locking structure of a telescopic shielding device according to claim 1, characterized in that: The locking cap (42) has a through hole (17) for the hanging rope to pass through.

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