Concealed hinge and T-shaped security and fireproof door

Abstract

The application discloses a hidden hinge and a T-shaped anti-theft and fireproof door, and relates to the technical field of door hinges. The hidden hinge comprises a first mounting base, a second mounting base provided with a avoiding groove, and a connecting assembly comprising a connecting piece and a pivot shaft, one end of the connecting piece is fixedly connected to the first mounting base, the other end of the connecting piece is rotatably connected to the second mounting base through the pivot shaft, and the connecting piece is U-shaped and can be accommodated in the avoiding groove. In use, the first mounting base is embedded on a door frame, and the second mounting base is embedded on a door leaf, wherein the connecting piece is U-shaped, the second mounting base is provided with the avoiding groove capable of accommodating the connecting piece, the second mounting base can rotate 180 degrees relative to the connecting piece, namely, the door leaf can rotate 180 degrees relative to the door frame, so that the door leaf can not occupy the position of an escape passage when being opened, and users can escape in case of fire, and the fire hose can pass through conveniently.

Description

Technical Field

[0001] This invention relates to the field of doors and windows, and particularly to a concealed hinge and a T-shaped anti-theft and fireproof door. Background Technology

[0002] The prior art proposes a T-type anti-theft and fireproof door with a T-shaped door leaf that can cover the gap between the door leaf and the door frame, and can install a sealing strip between the door leaf and the door frame. However, when the existing door hinges are applied to the above-mentioned T-type anti-theft and fireproof door, the door leaf will be interfered with by the door hinges during the opening process, that is, the opening angle of the door leaf is limited. When the door leaf is opened, it will occupy the position of the escape passage, thereby increasing the difficulty of escape, and will also obstruct the passage of fire water pipes. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a concealed hinge that allows the door leaf to rotate 180 degrees relative to the door frame, thereby preventing the door leaf from blocking the escape route when open and facilitating the passage of fire hoses.

[0004] The present invention also proposes a T-shaped anti-theft and fireproof door with the aforementioned hidden hinge.

[0005] A concealed hinge according to a first aspect of the present invention includes: a first mounting base; a second mounting base having a clearance groove; and a connecting assembly including a connector and a pivot shaft, one end of the connector being fixedly connected to the first mounting base, and the other end of the connector being rotatably connected to the second mounting base via the pivot shaft, the connector being U-shaped and capable of being housed within the clearance groove.

[0006] The concealed hinge according to an embodiment of the present invention has at least the following beneficial effects: In use, the first mounting base is embedded in the door frame and the second mounting base is embedded in the door leaf. The connector is U-shaped and the second mounting base is provided with a relief groove that can accommodate the connector, so that the second mounting base can rotate 180 degrees relative to the connector, that is, the door leaf can rotate 180 degrees relative to the door frame. This prevents the door leaf from occupying the position of the escape passage when it is opened, so as to facilitate the user's escape in the event of a fire and to facilitate the passage of fire hoses.

[0007] According to some embodiments of the present invention, the groove wall of the clearance groove is provided with a first extension and a second extension at intervals. The end of the connector near the second mounting seat is sandwiched between the first extension and the second extension. The end of the connector near the second mounting seat is provided with a first mounting through hole. The first extension is provided with a second mounting through hole, and the second extension is provided with a third mounting through hole. The center lines of the first mounting through hole, the second mounting through hole, and the third mounting through hole are collinear. The pivot shaft passes through the first mounting through hole, the second mounting through hole, and the third mounting through hole in sequence. Its structure is simple and easy to manufacture and assemble.

[0008] According to some embodiments of the present invention, the first mounting base includes a first base body and a second base body. The first base body is used to be embedded in the door frame. The end of the connector away from the second mounting base is fixedly disposed on the second base body. An up-and-down adjustment component is provided between the first base body and the second base body. The up-and-down adjustment component can adjust the relative position between the first base body and the second base body up and down. The above structure can adapt to different installation environments, and after long-term use, the position of the second base body can be adjusted by the up-and-down adjustment component to accommodate the deformation of the hidden hinge during use.

[0009] According to some embodiments of the present invention, the up-and-down adjustment assembly includes a first adjusting stud, a first fastening bolt, and an up-and-down adjustment block. A first receiving groove is provided on the first seat corresponding to the second seat, and the second seat is embedded in the first receiving groove. A first oblong stepped through hole is provided on the second seat. The shank of the first fastening bolt passes through the first oblong stepped through hole and is threaded to the first seat, so that the second seat is sandwiched between the first seat and the head of the first fastening bolt, and the second seat can slide up and down relative to the first fastening bolt. A first connecting portion is provided at both the upper and lower ends of the second seat, and each first connecting portion abuts against one of the up-and-down adjustment blocks. The up-and-down adjustment block has a first inclined abutting surface on the side facing the first connecting portion. A second inclined pressing surface is provided on one side of the upper and lower adjusting block. A first threaded hole is provided on the upper and lower adjusting block. A fourth mounting through hole is provided on the first seat body. The first adjusting stud passes through the fourth mounting through hole and is threadedly connected to the first threaded hole. A first limiting part is provided at the end of the first adjusting stud near the first seat body. The first limiting part is clamped between the door frame and the first seat body to restrict the back-and-forth movement of the first adjusting stud. A first turning groove is provided at the end of the first adjusting stud away from the first seat body, which can be connected with an external tool to drive the first adjusting stud to rotate. When the first adjusting stud rotates, it can drive the upper and lower adjusting block to move along the axial direction of the first adjusting stud, that is, it can drive the upper and lower adjusting block to move back and forth.When the second seat needs to be adjusted upward, loosen the first fastening bolt, and then drive the first adjusting stud located at the upper end of the second seat to rotate using an external tool, so that the up-down adjusting block located at the upper end of the second seat moves away from the first connecting part located at the upper end of the second seat. Then, drive the first adjusting stud located at the lower end of the second seat to rotate using an external tool, so that the up-down adjusting block located at the lower end of the second seat presses against the first connecting part located at the lower end of the second seat. At this time, the second seat can be driven to slide upward relative to the first seat through the mutual cooperation between the first inclined pressing surface and the second inclined pressing surface. After the second seat slides to the desired position, drive the first adjusting stud located at the upper end of the second seat to rotate using an external tool, so that the up-down adjusting block located at the upper end of the second seat approaches and presses against the first connecting part located at the upper end of the second seat. Finally, tighten the first fastening bolt. When the second seat needs to be adjusted downwards, loosen the first fastening bolt, and then drive the first adjusting stud located at the lower end of the second seat to rotate using an external tool, so that the up-down adjusting block located at the lower end of the second seat moves away from the first connecting part located at the lower end of the second seat. Then, drive the first adjusting stud located at the upper end of the second seat to rotate using an external tool, so that the up-down adjusting block located at the upper end of the second seat presses against the first connecting part located at the upper end of the second seat. At this time, the second seat can be driven to slide downwards relative to the first seat through the mutual cooperation between the first inclined pressing surface and the second inclined pressing surface. After the second seat slides to the desired position, drive the first adjusting stud located at the lower end of the second seat to rotate using an external tool, so that the up-down adjusting block located at the lower end of the second seat approaches and presses against the first connecting part located at the lower end of the second seat. Finally, tighten the first fastening bolt.

[0010] According to some embodiments of the present invention, a third seat is further included, wherein one end of the connector away from the second mounting base is fixedly connected to the third seat, and a front-to-back adjustment component is provided between the second seat and the third seat. The front-to-back adjustment component can adjust the relative position between the second seat and the third seat. The above structure can adapt to different installation environments, and after long-term use, the position of the third seat can be adjusted by the front-to-back adjustment component to accommodate the deformation of the hidden hinge during use.

[0011] According to some embodiments of the present invention, the front-to-back adjustment assembly includes a second adjusting stud and a second fastening bolt. A second receiving groove is provided on the second seat corresponding to the third seat. The third seat is embedded in the second receiving groove. A fifth mounting through hole is provided on the third seat. The shank of the second fastening bolt passes through the fifth mounting through hole and is threaded to the second seat, so that the third seat is sandwiched between the second seat and the head of the second fastening bolt. A sixth mounting through hole communicating with the second receiving groove is provided on the second seat. A second threaded hole is provided on the third seat. The second adjusting stud passes through the sixth mounting through hole and is threaded to the second threaded hole. A second limiting part is provided at one end of the second adjusting stud near the second seat. The second limiting part is sandwiched between the first seat and the second seat. A second turning groove is provided at one end of the second adjusting stud away from the second seat, which can be connected with an external tool to drive the second adjusting stud to rotate. When the second adjusting stud rotates, it can drive the third seat to move along the axial direction of the second adjusting stud, that is, it can drive the third seat to move back and forth. When adjustment is required, loosen the second fastening bolt, and then drive the second adjusting stud to rotate using an external tool. Since the second adjusting stud is restricted from moving back and forth, the rotation of the second adjusting stud can drive the third seat to move along the axis of the second adjusting stud, thereby adjusting the position of the third seat back and forth. After adjusting the third seat to the required position, tighten the second fastening bolt.

[0012] According to some embodiments of the present invention, a left-right adjustment component is provided between the end of the connector away from the second mounting base and the third base body. The left-right adjustment component can adjust the relative position between the third base body and the connector from left to right. The above structure can adapt to different installation environments, and after long-term use, the position of the connector can be adjusted by the left-right adjustment component to accommodate the deformation of the hidden hinge during use.

[0013] According to some embodiments of the present invention, the left and right adjustment assembly includes an adjustment member and a third fastening bolt. A second connecting portion is provided at the end of the connecting member away from the second mounting base. A third receiving groove for accommodating the second connecting portion is provided on the third base. A second oblong-shaped stepped through hole and a seventh mounting through hole are provided on the second connecting portion. The shank of the third fastening bolt passes through the second oblong-shaped stepped through hole and is threaded to the third base, such that the second connecting portion is sandwiched between the third base and the head of the third fastening bolt, and the second connecting portion can be positioned relative to the third fastening bolt. The bolt slides left and right. The third seat body is provided with an oblong hole or oblong groove communicating with the third receiving groove. The adjusting component includes an adjusting component body and an eccentric shaft. The eccentric shaft is eccentrically disposed at the end of the adjusting component body. The adjusting component body is rotatably inserted into the seventh mounting through hole. The eccentric shaft is inserted into the oblong hole or oblong groove. The end of the adjusting component body away from the eccentric shaft is provided with a third turning groove that can be connected with an external tool to drive the adjusting component to rotate. When the adjusting component rotates, it can drive the second connecting part to slide left and right relative to the third fastening bolt. When adjustment is required, loosen the third fastening bolt, and then drive the adjusting component to rotate with an external tool. Because the eccentric shaft is restricted by the oblong hole or oblong groove, the adjusting component can drive the second connecting part to slide left and right when it rotates, thereby adjusting the position of the connecting component left and right. After adjusting the connecting component to the required position, tighten the third fastening bolt.

[0014] According to some embodiments of the present invention, the first mounting base is detachably provided with a cover plate on the side facing the connector, and the cover plate is provided with a clearance opening for avoiding the connector, which is beneficial to improving aesthetics and can protect the structure of the first mounting base.

[0015] A T-shaped fireproof and burglarproof door according to a second aspect of the present invention includes a concealed hinge according to the first aspect of the present invention described above.

[0016] The T-type anti-theft and fireproof door according to an embodiment of the present invention has at least the following beneficial effects: In use, the first mounting base is embedded in the door frame and the second mounting base is embedded in the door leaf. The connector is U-shaped and the second mounting base is provided with a relief groove that can accommodate the connector, so that the second mounting base can rotate 180 degrees relative to the connector, that is, the door leaf can rotate 180 degrees relative to the door frame. This prevents the door leaf from occupying the position of the escape passage when it is opened, so as to facilitate the user's escape in the event of a fire and to facilitate the passage of fire hoses. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present invention. Figure 1 ;

[0019] Figure 2 This is a structural schematic diagram of an embodiment of the present invention. Figure 2 ;

[0020] Figure 3 yes Figure 2 Schematic diagram of section AA;

[0021] Figure 4 yes Figure 3 Enlarged view of a portion of point A in the middle;

[0022] Figure 5 yes Figure 3 Enlarged view of a portion of point B in the middle;

[0023] Figure 6 yes Figure 3 Enlarged view of a portion of point C in the middle;

[0024] Figure 7 This is an exploded view of an embodiment of the present invention;

[0025] Figure 8 yes Figure 7 Enlarged view of a portion of point D;

[0026] Figure 9 yes Figure 7 Enlarged view of a portion of point E in the middle;

[0027] Figure 10 yes Figure 7 Enlarged view of a portion of point F in the middle;

[0028] Figure 11 yes Figure 7 Enlarged view of a portion of point G in the middle;

[0029] Figure 12 yes Figure 7 A magnified view of a portion of point H in the middle.

[0030] Figure label:

[0031] First mounting base 100, first base body 110, first receiving groove 111, fourth mounting through hole 112, second base body 120, first waist-shaped stepped through hole 121, first connecting part 122, second inclined pressing surface 1221, second receiving groove 123, sixth mounting through hole 124, third base body 130, second threaded hole 131, third receiving groove 132, waist-shaped hole 133, fifth mounting through hole 134, second mounting base 200, clearance groove 210, first extension 220, second mounting through hole 221, second extension 230, third mounting through hole 231, connector 310, first mounting through hole Hole 311, second connecting part 312, second waist-shaped step through hole 3121, seventh mounting through hole 3122, pivot shaft 320, first adjusting stud 410, first limiting part 411, first turning groove 412, first fastening bolt 420, upper and lower adjusting block 430, first inclined pressing surface 431, first threaded hole 432, second adjusting stud 510, second limiting part 511, second turning groove 512, second fastening bolt 520, adjusting part 610, adjusting part body 611, third turning groove 6111, eccentric shaft 612, third fastening bolt 620, cover plate 700, clearance opening 710. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of this invention, it should be understood that if directional descriptions are involved, such as up, down, front, back, left, right, etc., indicating the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings, it is only for the convenience of describing this invention and simplifying the description, and does 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 invention.

[0034] In the description of this invention, if words such as several, greater than, less than, exceeding, above, below, or within appear, then several means one or more, multiple means two or more, greater than, less than, exceeding, etc. are understood to exclude the number itself, and above, below, or within are understood to include the number itself.

[0035] In the description of this invention, the use of terms such as "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0036] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0037] Reference Figure 1 and Figure 2 The concealed hinge according to an embodiment of the present invention includes a first mounting base 100, a second mounting base 200, and a connecting component.

[0038] The second mounting base 200 is provided with a clearance groove 210. The connecting assembly includes a connector 310 and a pivot shaft 320. One end of the connector 310 is fixedly connected to the first mounting base 100, and the other end of the connector 310 is rotatably connected to the second mounting base 200 through the pivot shaft 320. The connector 310 is U-shaped and can be housed in the clearance groove 210 so that the second mounting base 200 can rotate 180 degrees relative to the connector 310.

[0039] In use, the first mounting base 100 is embedded in the door frame, and the second mounting base 200 is embedded in the door leaf. The connector 310 is U-shaped, and the second mounting base 200 is provided with a relief groove 210 that can accommodate the connector 310, so that the second mounting base 200 can rotate 180 degrees relative to the connector 310, that is, the door leaf can rotate 180 degrees relative to the door frame. This prevents the door leaf from blocking the escape route when it is opened, so as to facilitate the user's escape in the event of a fire and to facilitate the passage of fire hoses.

[0040] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8 In some embodiments, the groove wall of the clearance groove 210 is provided with a first extension 220 and a second extension 230 at intervals. The end of the connector 310 near the second mounting base 200 is sandwiched between the first extension 220 and the second extension 230. The end of the connector 310 near the second mounting base 200 is provided with a first mounting through hole 311. The first extension 220 is provided with a second mounting through hole 221. The second extension 230 is provided with a third mounting through hole 231. The center lines of the first mounting through hole 311, the second mounting through hole 221, and the third mounting through hole 231 are collinear. The pivot shaft 320 passes through the first mounting through hole 311, the second mounting through hole 221, and the third mounting through hole 231 in sequence. Its structure is simple and easy to manufacture and assemble.

[0041] Reference Figures 1 to 3 as well as Figure 7In some embodiments, the first mounting base 100 includes a first base 110 and a second base 120. The first base 110 is used to be embedded in the door frame. The end of the connector 310 away from the second mounting base 200 is fixedly disposed on the second base 120. An up-and-down adjustment component is provided between the first base 110 and the second base 120. The up-and-down adjustment component can adjust the relative position between the first base 110 and the second base 120 up and down. The above structure can adapt to different installation environments, and after long-term use, the position of the second base 120 can be adjusted by the up-and-down adjustment component to accommodate the deformation of the hidden hinge during use.

[0042] Reference Figures 2 to 5 as well as Figure 7 , Figure 9 and Figure 10In some embodiments, the up-down adjustment assembly includes a first adjusting stud 410, a first fastening bolt 420, and an up-down adjustment block 430. A first receiving groove 111 is provided on the first seat 110 corresponding to the second seat 120. The second seat 120 is embedded in the first receiving groove 111. A first oblong stepped through hole 121 is provided on the second seat 120. The shank of the first fastening bolt 420 passes through the first oblong stepped through hole 121 and is threaded to the first seat 110, so that the second seat 120 is sandwiched between the first seat 110 and the head of the first fastening bolt 420, and the second seat 120 can slide up and down relative to the first fastening bolt 420. A first connecting portion 122 is provided at both the upper and lower ends of the second seat 120. Each first connecting portion 122 abuts against an up-down adjustment block 430. The up-down adjustment block 430 has a first inclined abutting surface 431 on the side facing the first connecting portion 122. A second inclined pressing surface 1221 is provided on one side of the upper and lower adjusting block 430. A first threaded hole 432 is provided on the upper and lower adjusting block 430. A fourth mounting through hole 112 is provided on the first accommodating groove 111. A first adjusting stud 410 passes through the fourth mounting through hole 112 and is threadedly connected to the first threaded hole 432. A first limiting part 411 is provided at the end of the first adjusting stud 410 near the first base 110. The first limiting part 411 is clamped between the door frame and the first base 110 to restrict the back-and-forth movement of the first adjusting stud 410. A first turning groove 412 is provided at the end of the first adjusting stud 410 away from the first base 110, which can be connected with an external tool to drive the first adjusting stud 410 to rotate. When the first adjusting stud 410 rotates, it can drive the upper and lower adjusting block 430 to move along the axis of the first adjusting stud 410, that is, it can drive the upper and lower adjusting block 430 to move back and forth.When the second seat 120 needs to be adjusted upwards, loosen the first fastening bolt 420, and then drive the first adjusting stud 410 located at the upper end of the second seat 120 to rotate using an external tool, so that the upper and lower adjusting block 430 located at the upper end of the second seat 120 moves away from the first connecting part 122 located at the upper end of the second seat 120. Then, drive the first adjusting stud 410 located at the lower end of the second seat 120 to rotate using an external tool, so that the upper and lower adjusting block 430 located at the lower end of the second seat 120 presses against the first connecting part 122 located at the lower end of the second seat 120. The connecting part 122 allows the second seat 120 to slide upward relative to the first seat 110 through the cooperation between the first inclined pressing surface 431 and the second inclined pressing surface 1221. After the second seat 120 slides to the desired position, the first adjusting stud 410 located at the upper end of the second seat 120 is rotated by an external tool so that the upper and lower adjusting block 430 located at the upper end of the second seat 120 approaches and presses against the first connecting part 122 located at the upper end of the second seat 120. Finally, the first fastening bolt 420 is tightened. When the second seat 120 needs to be adjusted downwards, loosen the first fastening bolt 420, and then drive the first adjusting stud 410 located at the lower end of the second seat 120 to rotate using an external tool, so that the upper and lower adjusting block 430 located at the lower end of the second seat 120 moves away from the first connecting part 122 located at the lower end of the second seat 120. Then, drive the first adjusting stud 410 located at the upper end of the second seat 120 to rotate using an external tool, so that the upper and lower adjusting block 430 located at the upper end of the second seat 120 presses against the first connecting part 122 located at the upper end of the second seat 120. The second seat 120 can slide downward relative to the first seat 110 through the cooperation between the first inclined pressing surface 431 and the second inclined pressing surface 1221. After the second seat 120 slides to the desired position, the first adjusting stud 410 located at the lower end of the second seat 120 is driven to rotate by an external tool so that the upper and lower adjusting block 430 located at the lower end of the second seat 120 approaches and presses against the first connecting part 122 located at the lower end of the second seat 120. Finally, the first fastening bolt 420 is tightened.

[0043] Reference Figure 2 , Figure 3 and Figure 7 In some embodiments, a third seat 130 is also included. The end of the connector 310 away from the second mounting base 200 is fixedly connected to the third seat 130. A front-to-back adjustment component is provided between the second seat 120 and the third seat 130. The front-to-back adjustment component can adjust the relative position between the second seat 120 and the third seat 130. The above structure can adapt to different installation environments, and after long-term use, the position of the third seat 130 can be adjusted by the front-to-back adjustment component to accommodate the deformation of the hidden hinge during use.

[0044] Reference Figure 3 , Figure 5 , Figure 7 and Figure 11 In some embodiments, the front and rear adjustment assembly includes a second adjusting stud 510 and a second fastening bolt 520. A second receiving groove 123 is provided on the second seat 120 corresponding to the third seat 130. The third seat 130 is embedded in the second receiving groove 123. A fifth mounting through hole 134 is provided on the third seat 130. The shank of the second fastening bolt 520 passes through the fifth mounting through hole 134 and is threaded to the second seat 120, so that the third seat 130 is sandwiched between the second seat 120 and the head of the second fastening bolt 520. A sixth mounting through hole 124 communicating with the second receiving groove 123 is provided on the second seat 120. A through hole 124 penetrating the second seat 120 is provided on the third seat 130. The second threaded hole 131 of the third seat 130, the second adjusting stud 510 passes through the sixth mounting through hole 124 and is threadedly connected to the second threaded hole 131. The second adjusting stud 510 is provided with a second limiting part 511 at one end near the second seat 120. The second limiting part 511 is sandwiched between the first seat 110 and the second seat 120. The second adjusting stud 510 is provided with a second turning groove 512 at one end away from the second seat 120, which can be connected with an external tool to drive the second adjusting stud 510 to rotate. When the second adjusting stud 510 rotates, it can drive the third seat 130 to move along the axis of the second adjusting stud 510, that is, it can drive the third seat 130 to move back and forth. When adjustment is required, loosen the second fastening bolt 520, and then drive the second adjusting stud 510 to rotate using an external tool. Since the second adjusting stud 510 is restricted from moving back and forth, the rotation of the second adjusting stud 510 can drive the third seat 130 to move along the axis of the second adjusting stud 510, thereby adjusting the position of the third seat 130 back and forth. After adjusting the third seat 130 to the required position, tighten the second fastening bolt 520.

[0045] In some embodiments, a left-right adjustment component is provided between the end of the connector 310 away from the second mounting base 200 and the third base 130. The left-right adjustment component can adjust the relative position between the third base 130 and the connector 310. The above structure can adapt to different installation environments, and after long-term use, the position of the connector 310 can be adjusted by the left-right adjustment component to accommodate the deformation of the hidden hinge during use.

[0046] Reference Figure 3 , Figure 6 , Figure 7 , Figure 11 and Figure 12In some embodiments, the left-right adjustment assembly includes an adjustment member 610 and a third fastening bolt 620. The end of the connector 310 furthest from the second mounting base 200 has a second connecting portion 312. The third base 130 has a third receiving groove 132 for accommodating the second connecting portion 312. The second connecting portion 312 has a second oblong-shaped stepped through hole 3121 and a seventh mounting through hole 3122. The shank of the third fastening bolt 620 passes through the second oblong-shaped stepped through hole 3121 and is threaded to the third base 130, so that the second connecting portion 312 is sandwiched between the third base 130 and the head of the third fastening bolt 620, and the second connecting portion 312 can be relatively... The third fastening bolt 620 slides left and right. The third seat 130 is provided with an oblong hole 133 that communicates with the third receiving groove 132. The adjusting member 610 includes an adjusting member body 611 and an eccentric shaft 612. The eccentric shaft 612 is eccentrically disposed at the end of the adjusting member body 611. The adjusting member body 611 is rotatably inserted into the seventh mounting through hole 3122. The eccentric shaft 612 is inserted into the oblong hole 133. The end of the adjusting member body 611 away from the eccentric shaft 612 is provided with a third turning groove 6111 that can be connected with an external tool to drive the adjusting member 610 to rotate. When the adjusting member 610 rotates, it can drive the second connecting part 312 to slide left and right relative to the third fastening bolt 620. When adjustment is required, loosen the third fastening bolt 620, and then drive the adjusting part 610 to rotate using an external tool. Since the eccentric shaft 612 is restricted by the waist-shaped hole 133, the second connecting part 312 can slide left and right when the adjusting part 610 rotates, thereby adjusting the position of the connecting part 310 left and right. After adjusting the connecting part 310 to the required position, tighten the third fastening bolt 620.

[0047] It should be noted that in some embodiments, the waist-shaped hole 133 can also be replaced by a waist-shaped groove or a rectangular hole, which is not limited here.

[0048] It should be noted that in some embodiments, the first waist-shaped stepped through hole 121 and the second waist-shaped stepped through hole 3121 can also be replaced with a rectangular stepped through hole, which is not limited here.

[0049] Reference Figure 1 and Figure 7 In some embodiments, the first mounting base 100 is detachably provided with a cover plate 700 on the side facing the connector 310. The cover plate 700 is provided with a clearance opening 710 for avoiding the connector 310, which helps to improve the aesthetics and protect the structure of the first mounting base 100.

[0050] It should be noted that in some embodiments, the cover plate 700 is connected to the first mounting base 100 by screws. Of course, the cover plate can also be connected to the first mounting base by a snap-fit ​​structure, which is not limited here.

[0051] According to an embodiment of the present invention, a T-shaped anti-theft and fireproof door includes the aforementioned concealed hinge.

[0052] In use, the first mounting base 100 is embedded in the door frame, and the second mounting base 200 is embedded in the door leaf. The connector 310 is U-shaped, and the second mounting base 200 is provided with a relief groove 210 that can accommodate the connector 310, so that the second mounting base 200 can rotate 180 degrees relative to the connector 310, that is, the door leaf can rotate 180 degrees relative to the door frame. This prevents the door leaf from blocking the escape route when it is opened, so as to facilitate the user's escape in the event of a fire and to facilitate the passage of fire hoses.

[0053] In the description of this specification, the use of terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A concealed hinge, characterized in that, include: First mounting base (100); The second mounting base (200) is provided with a clearance groove (210); A connecting assembly includes a connector (310) and a pivot (320). One end of the connector (310) is fixedly connected to the first mounting base (100), and the other end of the connector (310) is rotatably connected to the second mounting base (200) via the pivot (320). The connector (310) is U-shaped and can be housed in the clearance groove (210). The first mounting base (100) includes a first base body (110) and a second base body (120). The end of the connector (310) away from the second mounting base (200) is fixedly disposed on the second base body (120). An up-and-down adjustment component is disposed between the first base body (110) and the second base body (120). The up-and-down adjustment component can adjust the relative position between the first base body (110) and the second base body (120) up and down. It also includes a third seat (130), the end of the connector (310) away from the second mounting base (200) is fixedly connected to the third seat (130), and a front-to-back adjustment component is provided between the second seat (120) and the third seat (130), the front-to-back adjustment component can adjust the relative position between the second seat (120) and the third seat (130) back and forth; The front and rear adjustment assembly includes a second adjustment stud (510) and a second fastening bolt (520). A second receiving groove (123) is provided on the second seat (120) corresponding to the third seat (130). The third seat (130) is embedded in the second receiving groove (123). A fifth mounting through hole (134) is provided on the third seat (130). The shank of the second fastening bolt (520) passes through the fifth mounting through hole (134) and is threaded to the second seat (120), so that the third seat (130) is sandwiched between the second seat (120) and the head of the second fastening bolt (520). A sixth mounting through hole (124) is provided on the second seat (120) communicating with the second receiving groove (123). A sixth mounting through hole (124) is provided on the third seat (130). The second threaded hole (131) passes through the third seat (130), the second adjusting stud (510) passes through the sixth mounting through hole (124) and is threadedly connected to the second threaded hole (131), the second adjusting stud (510) is provided with a second limiting part (511) at one end near the second seat (120), the second limiting part (511) is sandwiched between the first seat (110) and the second seat (120), the second adjusting stud (510) is provided with a second turning groove (512) at one end away from the second seat (120) that can be connected with an external tool to drive the second adjusting stud (510) to rotate, when the second adjusting stud (510) rotates, it can drive the third seat (130) to move along the axial direction of the second adjusting stud (510).

2. The concealed hinge as described in claim 1, characterized in that, The clearance groove (210) has a first extension (220) and a second extension (230) spaced apart on its groove wall. The end of the connector (310) near the second mounting base (200) is sandwiched between the first extension (220) and the second extension (230). The end of the connector (310) near the second mounting base (200) has a first mounting through hole (311). The first extension (220) has a second mounting through hole (221). The second extension (230) has a third mounting through hole (231). The center lines of the first mounting through hole (311), the second mounting through hole (221), and the third mounting through hole (231) are collinear. The pivot shaft (320) passes through the first mounting through hole (311), the second mounting through hole (221), and the third mounting through hole (231) in sequence.

3. The concealed hinge as described in claim 1, characterized in that, The up-and-down adjustment assembly includes a first adjusting stud (410), a first fastening bolt (420), and an up-and-down adjustment block (430). A first receiving groove (111) is provided on the first seat (110) corresponding to the second seat (120). The second seat (120) is embedded in the first receiving groove (111). A first waist-shaped stepped through hole (121) is provided on the second seat (120). The shank of the first fastening bolt (420) passes through the first waist-shaped stepped through hole (121) and is threaded to the first adjusting block (430). A first seat (110) is provided so that a second seat (120) is sandwiched between the first seat (110) and the head of the first fastening bolt (420), and the second seat (120) can slide up and down relative to the first fastening bolt (420). A first connecting part (122) is provided at both the upper and lower ends of the second seat (120), and a vertical adjustment block (430) is pressed against each of the first connecting parts (122). The vertical adjustment block (430) faces the first connecting part (122). A first inclined pressing surface (431) is provided on one side of the first connecting part (122), and a second inclined pressing surface (1221) is provided on the side of the first connecting part (122) facing the upper and lower adjusting block (430). A first threaded hole (432) is provided on the upper and lower adjusting block (430), and a fourth mounting through hole (112) is provided on the first base (110) communicating with the first receiving groove (111). The first adjusting stud (410) passes through the fourth mounting through hole (112) and is connected to the first... A threaded hole (432) is threadedly connected. The first adjusting stud (410) is provided with a first limiting part (411) at one end near the first seat (110). The first adjusting stud (410) is provided with a first turning groove (412) at one end away from the first seat (110) so as to be connected with an external tool to drive the first adjusting stud (410) to rotate. When the first adjusting stud (410) rotates, it can drive the upper and lower adjusting blocks (430) to move along the axis of the first adjusting stud (410).

4. The concealed hinge as described in claim 1, characterized in that, A left-right adjustment component is provided between the end of the connector (310) away from the second mounting base (200) and the third base (130), and the left-right adjustment component can adjust the relative position between the third base (130) and the connector (310) left and right.

5. The concealed hinge as described in claim 4, characterized in that, The left-right adjustment assembly includes an adjustment member (610) and a third fastening bolt (620). A second connecting portion (312) is provided at the end of the connecting member (310) away from the second mounting base (200). A third receiving groove (132) for accommodating the second connecting portion (312) is provided on the third base (130). A second waist-shaped stepped through hole (3121) and a seventh mounting through hole (3122) are provided on the second connecting portion (3121). The shank of the third fastening bolt (620) passes through the second waist-shaped stepped through hole (3121) and is threaded to the third base (130), so that the second connecting portion (312) is sandwiched between the third base (130) and the head of the third fastening bolt (620), and the second connecting portion (312) can slide left and right relative to the third fastening bolt (620). The third seat (130) is provided with a waist-shaped hole (133) or a waist-shaped groove communicating with the third receiving groove (132). The adjusting member (610) includes an adjusting member body (611) and an eccentric shaft (612). The eccentric shaft (612) is eccentrically disposed at the end of the adjusting member body (611). The adjusting member body (611) is rotatably inserted into the seventh mounting through hole (3122). The eccentric shaft (612) is inserted into the waist-shaped hole (133) or the waist-shaped groove. The end of the adjusting member body (611) away from the eccentric shaft (612) is provided with a third turning groove (6111) that can be connected with an external tool to drive the adjusting member (610) to rotate. When the adjusting member (610) rotates, it can drive the second connecting part (312) to slide left and right relative to the third fastening bolt (620).

6. The concealed hinge as described in any one of claims 3 to 5, characterized in that, The first mounting base (100) is detachably provided with a cover plate (700) on the side facing the connector (310), and the cover plate (700) is provided with a clearance opening (710) for avoiding the connector (310).

7. A T-shaped anti-theft and fireproof door, characterized in that, Includes the concealed hinge as described in any one of claims 1 to 6.

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