A security door for a yard

Abstract

The utility model provides a kind of courtyard security door, including courtyard wall, the guide unit is set in courtyard wall inner side, slide rail is set in the lower portion of guide unit, left side door and right side door are respectively slid between guide unit and slide rail, left side door includes left door panel, and the inner side of left door panel is provided with left fixed unit;Right side door includes right door panel, and the inner side of right door panel is provided with right fixed unit, and left fixed unit can be inserted into right fixed unit.The utility model described a kind of courtyard security door, by setting left fixed unit and right fixed unit, and wherein contain multiple fixed structure, multiple insurance is fixed, reduce security risk, by setting torsion spring, make upper projection and lower projection always keep fixed state, by left side door and right side door mutual contact, left side door and right side door can be directly mutually fixed, need not twist key to lock, improve the degree of convenience of door lock.

Description

Technical Field

[0001] This utility model belongs to the field of security doors, and in particular relates to a courtyard security door. Background Technology

[0002] As the first line of defense for a courtyard, the gate must simultaneously meet the requirements of theft prevention, weather resistance, and convenient passage.

[0003] Traditional courtyard gates mostly adopt a hinged structure. Because they occupy a lot of space when opening or closing, they have gradually evolved into sliding courtyard gates. However, most existing sliding courtyard gates use single-point locks, and the lock cylinders have weak anti-technical opening capabilities, making them easy to be forcibly pried open, which can lead to property damage or security risks. Utility Model Content

[0004] In view of this, the present invention aims to propose a courtyard security door to solve the problem that traditional sliding courtyard doors with single-point locks are easily pried open by force, resulting in property damage or security risks.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A courtyard security door includes a courtyard wall, a guide unit on the inner side of the courtyard wall, and a slide rail below the guide unit. A left door and a right door slide between the guide unit and the slide rail. The left door includes a left door panel, a left support beam on the inner side of the left door panel, and the upper outer periphery of the left support beam is located within the inner circle of the guide unit. Multiple first rollers are evenly distributed on the lower end of the left support beam, and the outer periphery of each first roller is rotatably connected to the outer periphery of the slide rail. A left fixing unit is provided on the inner side of the left door panel, and the left fixing unit is located on one side of the left support beam. The right door includes a right door panel, a right support beam on the inner side of the right door panel, and the upper outer periphery of the right support beam is located within the inner circle of a guide unit. Multiple second rollers are evenly distributed horizontally on the lower end of the right support beam, and the outer periphery of each second roller is rotatably connected to the outer periphery of a slide rail. A right fixing unit is provided on the inner side of the right door panel, and the right fixing unit is located on one side of the right support beam. The left fixing unit can be inserted into the right fixing unit.

[0006] Furthermore, the left fixing unit includes a first housing and an upper rotating shaft, a lower rotating shaft, and a handle respectively rotatably disposed within the first housing, with the handle located between the upper rotating shaft and the lower rotating shaft.

[0007] Furthermore, a first driven gear is provided at the lower end of the upper rotating shaft, and multiple upper protrusions are evenly distributed axially along one side of the outer periphery of the upper rotating shaft. A second driven gear is provided at the upper end of the lower rotating shaft, and multiple lower protrusions are evenly distributed axially along one side of the outer periphery of the lower rotating shaft. The upper and lower protrusions have the same structure and are arranged opposite each other. The upper protrusion is L-shaped, and one end of the upper protrusion has an arc-shaped chamfer. Multiple first through slots are provided on one side of the first housing, and each first through slot corresponds to one upper protrusion or one lower protrusion. The outer periphery of the middle part of the handle is rotatably connected to the inner middle part of the first housing. A torsion spring is provided on the outer periphery of one end of the handle, and a bevel gear is provided on one end of the handle. The two ends of the torsion spring are respectively fixedly connected to the inner wall of one side of the first housing and one side of the bevel gear. The outer periphery of the bevel gear meshes with the outer periphery of the first driven gear and the second driven gear, respectively.

[0008] Furthermore, the right fixing unit includes an upper shell, a lower shell, an upper fixing structure, and a lower fixing structure. The upper shell and the lower shell are connected end to end. A plurality of first mounting grooves are evenly distributed along the axial direction on one side of the upper shell, and each first mounting groove corresponds to an upper protrusion. An upper fixing structure is provided in each first mounting groove. A plurality of second mounting grooves are evenly distributed along the axial direction on one side of the lower shell, and each second mounting groove corresponds to a lower protrusion. A lower fixing structure is provided in each second mounting groove. According to one embodiment of the present invention, the upper fixing structure and the lower fixing structure have the same structure and are arranged opposite to each other. The upper fixing structure includes a mounting box, a spring, and a spring. A spring is provided in the mounting box, and the outer periphery of the spring is slidably connected to the inner ring of the mounting box. A spring is provided in the mounting box, and the two ends of the spring are respectively fixedly connected to one side inner wall of the mounting box and one end of the spring.

[0009] Furthermore, the right-side door also includes a small door, and a window is provided on the right-side door panel, with one side of the inner wall of the window hinged to one side of the small door, which is used to close the window.

[0010] Furthermore, the left and right door panels are respectively provided with a left mounting groove and a right mounting groove on their outer sides, and a left pull ring and a right pull ring are respectively rotatably installed in the left mounting groove and the right mounting groove, which are used to open or close the door.

[0011] Furthermore, the guiding unit includes a frame and guide wheels. The frame has a U-shaped structure. One side of the frame is fixedly connected to one side of the courtyard wall, and the inner walls of both sides of the frame can be slidably connected to the left support beam or the upper outer periphery of the support beam. Multiple guide wheels are evenly distributed along the axial direction inside the frame, and the outer periphery of one side of each guide wheel can be rollably connected to the left support beam or the upper end of the support beam.

[0012] Compared with the prior art, the courtyard security door described in this utility model has the following beneficial effects: (1) The courtyard anti-theft door described in this utility model is fixed by setting a left fixed unit and a right fixed unit, which includes multiple sets of fixed structures and multiple insurances to reduce safety hazards. By setting a torsion spring, the upper protrusion and the lower protrusion are always kept in a fixed state. By contacting the left door and the right door with each other, the left door and the right door can be directly fixed to each other without turning the key to lock, thus improving the convenience of the door lock.

[0013] (2) The courtyard security door described in this utility model prevents the door from shifting or tipping over during the opening and closing process by setting a guide unit and a slide rail, thereby reducing safety hazards. By setting a guide wheel, a first roller and a second roller, it is convenient to move the left or right door when opening and closing the door, saving the user's physical strength and improving convenience. Attached Figure Description

[0014] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a courtyard security door according to an embodiment of the present utility model; Figure 2 This is a partial cross-sectional structural diagram of the left door described in an embodiment of the present utility model; Figure 3 This is a cross-sectional structural diagram of the left fixing unit described in an embodiment of the present invention; Figure 4 This is a schematic diagram of the upper rotating shaft according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the structure of the lower rotating shaft according to an embodiment of the present utility model; Figure 6 for Figure 3 A magnified view of part A in the image; Figure 7 This is a partial cross-sectional structural diagram of the right-side door according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the right fixing unit described in an embodiment of the present invention; Figure 9 This is a cross-sectional view of the upper fixing structure described in an embodiment of the present utility model; Figure 10 This is a schematic diagram of the structure of the guide unit described in an embodiment of the present utility model; Figure 11 for Figure 1 A magnified view of part B in the image; Figure 12 for Figure 1 A magnified view of part C.

[0015] Explanation of reference numerals in the attached figures: 1-Left side door; 11-Left door panel; 111-Left mounting groove; 112-Left pull ring; 12-Left fixing unit; 121-First outer shell; 1211-First through groove; 122-Upper pivot; 1221-First driven gear; 1222-Upper protrusion; 123-Lower pivot; 1231-Second driven gear; 1232-Lower protrusion; 124-Handle; 1241-Torsion spring; 1242-Bevel gear; 13-Left support beam; 14-First roller; 2-Right side door; 21-Right door panel ; 211-Right mounting slot; 212-Right pull ring; 213-Window; 22-Right fixing unit; 221-Upper housing; 2211-First mounting slot; 222-Lower housing; 2221-Second mounting slot; 223-Upper fixing structure; 2231-Mounting box; 2232-Spring; 2233-Spring; 224-Lower fixing structure; 23-Right support beam; 24-Second roller; 25-Small door; 3-Guide unit; 31-Frame; 32-Guide wheel; 4-Slide rail; 5-Courtyard wall. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 As shown, the enclosure includes a courtyard wall 5, with a guide unit 3 installed on the inner side of the courtyard wall 5. A slide rail 4 is installed below the guide unit 3. The left door 1 and the right door 2 slide between the guide unit 3 and the slide rail 4, respectively. By setting the guide unit 3 and the slide rail 4, the displacement trajectory of the left door 1 and the right door 2 can be limited, preventing the left door 1 or the right door 2 from shifting or tipping over during the opening and closing process, thus reducing safety hazards. Furthermore, by setting the left door 1 and the right door 2 as push-pull doors, space waste is reduced during the opening and closing process. At the same time, decorative blocks are set on the outer sides of the left door 1 and the right door 2 to increase aesthetics.

[0021] like Figure 2 As shown, the left door 1 includes a left door panel 11. A left support beam 13 is provided on the inner side of the left door panel 11, and the upper outer periphery of the left support beam 13 is located in the inner circle of the guide unit 3. Multiple first rollers 14 are evenly distributed on the lower end of the left support beam 13, and the outer periphery of each first roller 14 is rotatably connected to the outer periphery of the slide rail 4. A left fixing unit 12 is provided on the inner side of the left door panel 11, and the left fixing unit 12 is located on one side of the left support beam 13. By setting the left support beam 13, the structural strength of the door panel 11 can be strengthened and the anti-theft performance can be enhanced. By setting multiple first rollers 14, effort is saved when opening and closing the door. By setting a left mounting groove 111 on the outer side of the left door panel 11 and a left pull ring 112 rotatably set in the left mounting groove 111, support can be provided when closing the door on the outside. In the initial state, it is hidden in the left mounting groove 111, which increases the aesthetics.

[0022] like Figure 3-6 As shown, the left fixed unit 12 includes a first outer shell 121 and an upper rotating shaft 122, a lower rotating shaft 123, and a handle 124, which are rotatably disposed within the first outer shell 121. The handle 124 is located between the upper rotating shaft 122 and the lower rotating shaft 123. A first driven gear 1221 is provided at the lower end of the upper rotating shaft 122, and multiple upper protrusions 1222 are evenly distributed axially on one side of the outer periphery of the upper rotating shaft 122. A second driven gear 1231 is provided at the upper end of the lower rotating shaft 123, and multiple lower protrusions 1231 are evenly distributed axially on one side of the outer periphery of the lower rotating shaft 123. 32; The upper protrusion 1222 and the lower protrusion 1232 have the same structure and are arranged opposite each other. The upper protrusion 1222 is L-shaped and one end of the upper protrusion 1222 is provided with an arc-shaped chamfer. The first outer shell 121 is provided with a plurality of first through slots 1211 on one side, and each first through slot 1211 corresponds to one upper protrusion 1222 or one lower protrusion 1232 respectively. By setting the upper rotating shaft 122 and the lower rotating shaft 123, when locking the door, the execution ends of the upper protrusion 1222 and the lower protrusion 1232 are in opposite positions and fixed on both sides to increase the fixing strength.

[0023] The handle 124 is rotatably connected to the inner center of the first housing 121. A torsion spring 1241 is provided on the outer periphery of one end of the handle 124, and a bevel gear 1242 is provided on the other end of the handle 124. The two ends of the torsion spring 1241 are respectively fixedly connected to the inner wall of one side of the first housing 121 and the side of the bevel gear 1242. The outer periphery of the bevel gear 1242 meshes with the outer periphery of the first driven gear 1221 and the second driven gear 1231. By setting the bevel gear 1242 meshing with the outer periphery of the first driven gear 1221 and the second driven gear 1231, rotating the handle 124 drives the bevel gear 1242 to rotate, which in turn drives the upper rotating shaft 122 and the lower rotating shaft 123 to rotate in opposite directions. By setting the torsion spring 1241, the upper rotating shaft 122 and the lower rotating shaft 123 can be kept fixed in the initial state, so that the upper protrusion 1222 and the lower protrusion 1232 are always kept in the locked state.

[0024] like Figure 7 As shown, the right door 2 includes a right door panel 21, a right fixing unit 22, and a right support beam 23. The right support beam 23 is provided on the inner side of the right door panel 21, and the upper periphery of the right support beam 23 is located in the inner circle of a guide unit 3. Multiple second rollers 24 are evenly distributed in the transverse direction at the lower end of the right support beam 23, and the periphery of each second roller 24 is rotatably connected to the periphery of a slide rail 4. The right fixing unit 22 is provided on the inner side of the right door panel 21, and the right fixing unit 22 is located on one side of the right support beam 23. The right door panel 21 has a right mounting groove 211 on the outer side, and a right pull ring 212 is rotatably installed in the right mounting groove 211. By setting the guide unit 3 and the second rollers 24 rotatably connected to the periphery of a slide rail 4, the right door 2 is prevented from deviating during movement, improving safety and convenience. At the same time, the right support beam 23 provides strength support for the right door panel 21.

[0025] The right door 2 also includes a small door 25. A window 213 is provided on the right door panel 21, and the inner wall of one side of the window 213 is hinged to one side of the small door 25. The small door 25 is used to close the window 213. By setting the small door 25, it can be selectively opened according to needs, thus improving convenience.

[0026] like Figure 8As shown, the right fixing unit 22 includes an upper housing 221, a lower housing 222, an upper fixing structure 223, and a lower fixing structure 224. The upper housing 221 and the lower housing 222 are connected end to end. Multiple first mounting grooves 2211 are evenly distributed along the axial direction on one side of the upper housing 221, and each first mounting groove 2211 corresponds to an upper protrusion 1222. An upper fixing structure 223 is disposed within each first mounting groove 2211. Multiple second mounting grooves 2221 are evenly distributed along the axial direction on one side of the lower housing 222, and each second mounting groove 2221... Each of the upper and lower protrusions 1222 and 1232 is respectively provided with a lower protrusion 1232 and a lower fixing structure 224 respectively. By setting the first mounting groove 2211 and the second mounting groove 2221 respectively corresponding to the upper protrusion 1222 and the lower protrusion 1232, and installing the upper fixing structure 223 and the lower fixing structure 224 in the first mounting groove 2211 and the second mounting groove 2221 respectively, the upper protrusion 1222 and the lower protrusion 1232 are fixed by the upper fixing structure 223 and the lower fixing structure 224, thereby improving the anti-theft performance and security of the courtyard gate.

[0027] like Figure 9 As shown, the upper fixing structure 223 and the lower fixing structure 224 have the same structure and are arranged opposite to each other. The upper fixing structure 223 includes a mounting box 2231, a spring 2232, and a spring 2233. The spring 2232 is provided inside the mounting box 2231, and the outer periphery of the spring 2232 is slidably connected to the inner ring of the mounting box 2231. The spring 2233 is provided inside the mounting box 2231, and the two ends of the spring 2233 are respectively fixedly connected to one side of the inner wall of the mounting box 2231 and one end of the spring 2232. The spring 2232 can be fixed in the mounting box by the spring 2233. The spring 2231 extends inward, and the end of the upper protrusion 1222 or the lower protrusion 1232 with an arc-shaped chamfer abuts against the end of the spring 2232 with an arc-shaped chamfer, causing the spring 2232 to retract into the mounting box 2231. When the end of the upper protrusion 1222 or the lower protrusion 1232 with an arc-shaped chamfer completely passes through the periphery of the spring 2232, the spring 2233 springs up the locking tongue 2232, fixing the upper protrusion 1222 or the lower protrusion 1232 in the first mounting groove 2211 or the second mounting groove 2221, thereby locking and fixing the left door 1 and the right door 2.

[0028] like Figure 10As shown, the guide unit 3 includes a frame 31 and guide wheels 32. The frame 31 has a U-shaped structure. One side of the frame 31 is fixedly connected to one side of the courtyard wall 5, and the inner walls of both sides of the frame 31 can be slidably connected to the upper outer periphery of the left support beam 13 or the support beam 23. Multiple guide wheels 32 are evenly distributed along the axial direction inside the frame 31, and the outer periphery of one side of each guide wheel 32 can be slidably connected to the upper end of the left support beam 13 or the support beam 23. By setting the guide wheels 32 that are slidably connected to the upper end of the left support beam 13 or the support beam 23, the friction between the left door 1 or the right door 2 and the frame 31 is reduced, the convenience of opening or closing the door is improved, and the user's physical strength is saved.

[0029] like Figure 11-12 As shown, a baffle is installed on the side of the left door 1 near the right door 2, and a step is installed on the side of the right door 2 near the left door 1. The outer edge of one side of the baffle can abut against the inner wall of one side of the step. The baffle blocks the door gap between the left door 1 and the right door 2, preventing technical unlocking and improving security.

[0030] The working process of a courtyard security door: During the opening or closing process of the door located inside the courtyard, the left door panel 11 and the right door panel 21 are pushed closer or further apart by the left support beam 13 or the right support beam 23. During the opening or closing process of the door located outside the courtyard, the left pull ring 112 of the left door 1 or the right pull ring 212 of the right door 2 are used to apply force to push the left door panel 11 and the right door panel 21 closer or further apart until the left and right door panels reach the preset position.

[0031] The upper end of the left support beam 13 slides along the inner ring of the guide unit 3, and the first roller 14 at the lower end rolls on the slide rail 4; the upper end of the right support beam 23 also slides against the guide unit 3, and the second roller 24 at the lower end rolls along the slide rail 4 to reduce motion resistance. The frame 31 of the guide unit 3 has a U-shaped structure, which restricts the lateral displacement of the upper end of the left support beam 13 or the right support beam 23 to ensure the stability of the sliding direction. The guide wheel 32 inside the frame 31 rolls in contact with the upper end of the support beam to reduce the friction when the door slides and improve the smoothness of operation.

[0032] During the closing process of the door, under the action of the torsion spring 1241, the upper protrusion 1222 and the lower protrusion 1232 are always in a locked state, and the left door 1 and the right door 2 are in contact with each other. At the same time, the upper protrusion 1222 of the upper pivot 122 extends out through the first through groove 1211 and inserts into the first mounting groove 2211 of the upper housing 221 of the right door 2, pressing the spring tongue 2232 of the upper fixing structure 223 and compressing the spring 2233. After the spring rebounds, the spring tongue locks the upper protrusion 1222 to achieve upper fixation. The lower protrusion 1232 of the lower pivot 123 extends out through the first through groove 1211 and inserts into the second mounting groove 2221 of the lower housing 222 of the right door, pressing the spring tongue of the lower fixing structure 224 and compressing the spring. After the spring rebounds, it locks the lower protrusion 1232 to achieve lower fixation.

[0033] When unlocking, turn handle 124 to pull open the left door 1 and right door 2 in the opposite direction. The upper protrusion 1222 and the lower protrusion 1232 will respectively exit the corresponding first mounting groove 2211 and second mounting groove 2221, releasing the lock. The torsion spring 1241 assists in resetting the handle.

[0034] When there is no need to open or close the main door, the small door 25 can be operated through the window 213 of the right door panel 21. The small door 25 can be opened inward by rotating through the hinge point on one side, and the window can be used after closing.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A courtyard security door, comprising a courtyard wall (5), a guide unit (3) provided on the inner side of the courtyard wall (5), a slide rail (4) provided below the guide unit (3), and a left door (1) and a right door (2) sliding between the guide unit (3) and the slide rail (4), characterized in that: The left door (1) includes a left door panel (11), a left support beam (13) is provided on the inner side of the left door panel (11), and the upper outer periphery of the left support beam (13) is located in the inner circle of the guide unit (3). Multiple first rollers (14) are evenly distributed on the lower end of the left support beam (13), and the outer periphery of each first roller (14) is respectively connected to the outer periphery of the slide rail (4). A left fixing unit (12) is provided on the inner side of the left door panel (11), and the left fixing unit (12) is located on one side of the left support beam (13). The right door (2) includes a right door panel (21), a right support beam (23) is provided on the inner side of the right door panel (21), and the upper outer periphery of the right support beam (23) is located in the inner circle of a guide unit (3). Multiple second rollers (24) are evenly arranged on the lower end of the right support beam (23) along the horizontal direction, and the outer periphery of each second roller (24) is respectively connected to the outer periphery of a slide rail (4). A right fixing unit (22) is provided on the inner side of the right door panel (21), and the right fixing unit (22) is located on one side of the right support beam (23), and the left fixing unit (12) can be inserted into the right fixing unit (22).

2. A courtyard security door according to claim 1, characterized in that: The left fixed unit (12) includes a first housing (121) and an upper rotating shaft (122), a lower rotating shaft (123) and a handle (124) respectively rotatably disposed in the first housing (121), and the handle (124) is located between the upper rotating shaft (122) and the lower rotating shaft (123).

3. A courtyard security door according to claim 2, characterized in that: The lower end of the upper rotating shaft (122) is provided with a first driven gear (1221), and multiple upper protrusions (1222) are evenly distributed along the axial direction on one side of the upper rotating shaft (122). The upper end of the lower rotating shaft (123) is provided with a second driven gear (1231), and multiple lower protrusions (1232) are evenly distributed along the axial direction on one side of the lower rotating shaft (123). The upper protrusion (1222) and the lower protrusion (1232) have the same structure and are arranged opposite each other. The upper protrusion (1222) is L-shaped and one end of the upper protrusion (1222) is provided with an arc-shaped chamfer. The first outer shell (121) has a plurality of first through slots (1211) on one side, and each first through slot (1211) corresponds to an upper protrusion (1222) or a lower protrusion (1232). The handle (124) is rotatably connected to the inner middle of the first outer shell (121) at its central periphery. A torsion spring (1241) is provided on the periphery of one end of the handle (124), and a bevel gear (1242) is provided on one end of the handle (124). The two ends of the torsion spring (1241) are respectively fixedly connected to the inner wall of one side of the first outer shell (121) and the side of the bevel gear (1242). The outer periphery of the bevel gear (1242) meshes with the outer periphery of the first driven gear (1221) and the second driven gear (1231), respectively.

4. A courtyard security door according to claim 1, characterized in that: The right fixing unit (22) includes an upper shell (221), a lower shell (222), an upper fixing structure (223) and a lower fixing structure (224). The upper shell (221) and the lower shell (222) are connected end to end. A plurality of first mounting grooves (2211) are evenly distributed along the axial direction on one side of the upper shell (221). Each first mounting groove (2211) corresponds to an upper protrusion (1222), and an upper fixing structure (223) is provided in each first mounting groove (2211). A plurality of second mounting grooves (2221) are evenly arranged along the axial direction on one side of the lower housing (222), and each second mounting groove (2221) corresponds to a lower protrusion (1232), and each second mounting groove (2221) is provided with a lower fixing structure (224).

5. A courtyard security door according to claim 4, characterized in that: The upper fixing structure (223) and the lower fixing structure (224) have the same structure and are arranged opposite to each other. The upper fixing structure (223) includes a mounting box (2231), a spring (2232) and a spring (2233). The spring (2232) is provided inside the mounting box (2231), and the outer periphery of the spring (2232) is slidably connected to the inner ring of the mounting box (2231). The spring (2233) is provided inside the mounting box (2231), and the two ends of the spring (2233) are respectively fixedly connected to one side of the inner wall of the mounting box (2231) and one end of the spring (2232).

6. A courtyard security door according to claim 1, characterized in that: The right door (2) also includes a small door (25), and a window (213) is provided on the right door panel (21). The inner wall of one side of the window (213) is hinged to one side of the small door (25). The small door (25) is used to close the window (213).

7. A courtyard security door according to claim 1, characterized in that: The left door panel (11) and the right door panel (21) are respectively provided with a left mounting groove (111) and a right mounting groove (211) on their outer sides, and a left pull ring (112) and a right pull ring (212) are respectively rotatably installed in the left mounting groove (111) and the right mounting groove (211), and the left pull ring (112) and the right pull ring (212) are used to open or close the door.

8. A courtyard security door according to claim 1, characterized in that: The guide unit (3) includes a frame (31) and guide wheels (32). The frame (31) is a U-shaped structure. One side of the frame (31) is fixedly connected to one side of the courtyard wall (5). The inner walls of both sides of the frame (31) can be slidably connected to the upper outer periphery of the left support beam (13) or the support beam (23). Multiple guide wheels (32) are evenly arranged along the axial direction inside the frame (31). The outer periphery of one side of each guide wheel (32) can be slidably connected to the upper end of the left support beam (13) or the support beam (23).

Images