Hidden door hinge

Abstract

The utility model discloses a hidden door hinge. The fan blade part comprises a fan blade main body (110), a clamping plate (120) and a locking bolt (131). And two breadths of the fan blade main body are respectively provided with a mounting groove. The clamping plate is located in the first mounting groove (110a) in a clearance fit mode. The front end of a first rocker arm (310) of the rotating shaft part is located in the second installation groove in a clearance fit mode and clamped and fixed to the two sides of the fan blade body through a locking bolt and a clamping plate. The locking bolt penetrates through the first bolt through hole of the fan blade body in a clearance fit mode. The clamping plate and the front end of the first rocker arm can be transversely and longitudinally adjusted on the fan blade body and are positioned with the fan blade body through a positioning piece. The door hinge is convenient to install, and strict and accurate grooving of the door leaf and the door frame is not needed.

Description

Technical Field

[0001] The utility model belongs to the technical field of hinges, and in particular relates to a hidden door hinge. Background Art

[0002] Hidden door hinges are also called concealed door hinges, which consist of a leaf section, a frame section and a pivot section. The leaf section is embedded in the door leaf, which is then embedded in the door frame. The pivot section includes multiple rocker arms and pivots, which can be folded and stored in the storage slots of the leaf section and / or frame section. This type of hinge allows the door leaf to open and close at an angle greater than 90 degrees, and there is almost no gap between the fully opened or closed door leaf and the door frame, thus hiding itself.

[0003] The installation of this type of hinge requires precise grooves between the door leaf and the door panel, or repeated adjustments and positioning are required. Utility Model Content

[0004] The technical problem to be solved by the utility model is how to improve the hidden door hinge to reduce the requirements for slotting of the door leaf and the door frame.

[0005] The utility model discloses a hidden door hinge.

[0006] The hidden door hinge comprises a leaf portion, a frame portion and a shaft portion, wherein the frame portion is provided with a receiving groove, and the shaft portion comprises a first rocker arm and can be folded and received in the receiving groove;

[0007] The fan leaf portion comprises:

[0008] A leaf body, configured as a straight strip plate, the middle parts of the two widths are respectively provided with a first mounting groove and a second mounting groove, and the bottom surfaces of the first mounting groove and the second mounting groove are provided with two first bolt through holes;

[0009] A clamping plate configured as a straight strip plate, located in the first mounting groove with clearance fit, and provided with two second bolt through holes; and

[0010] Locking bolts;

[0011] The front end of the first rocker arm is configured as a straight strip plate, and is provided with two third bolt through holes, which are clamped and fixed with the clamping plate on both sides of the leaf body, and are located in the second mounting groove with clearance fit;

[0012] The locking bolt passes through the third bolt through hole, the first bolt through hole and the second bolt through hole, has a clearance fit with the first bolt through hole, and has a transition fit with the second bolt through hole and the third bolt through hole;

[0013] The positions of the clamping plate and the front end of the first rocker arm relative to the sash body can be adjusted horizontally and vertically, and at least one of the two is positioned with the sash body through a positioning piece.

[0014] In some embodiments of the present invention, it can be selected that the locking bolt is countersunk in the third bolt through hole.

[0015] In some embodiments of the utility model, the fan leaf portion may further include a pair of magnetic decorative plates for covering the locking bolts; permanent magnets are respectively embedded in the back sides of both ends of the fan leaf body outside the second mounting groove; and the permanent magnets are used for magnetically attracting the magnetic decorative plates.

[0016] In some embodiments of the present invention, it can be selected that the first mounting groove and the second mounting groove have the same contour shape, both of which are approximately trapezoidal, and the side lengths on both sides of the long axis are different.

[0017] In some embodiments of the utility model, it can be selected that two waist-shaped through holes are respectively provided at the two ends of the long axis direction of the sash body; the four waist-shaped through holes are used for screws or pins to pass through the countersunk heads, so that the sash part can be installed in a door leaf groove.

[0018] In some embodiments of the present invention, the positioning member can be configured as a positioning tooth.

[0019] By implementing the technical solution of the utility model, the following beneficial effects can be obtained.

[0020] The utility model discloses a hidden door hinge. Its sash portion includes a sash body, a clamping plate and a locking bolt. Two surfaces of the sash body are respectively provided with mounting grooves. The clamping plate is positioned in a first mounting groove with a clearance fit. The front end of the first rocker arm of the rotating shaft portion is positioned in a second mounting groove with a clearance fit, and is clamped and fixed on both sides of the sash body by the locking bolt and the clamping plate. The locking bolt passes through the first bolt through hole of the sash body with a clearance fit. The clamping plate and the front end of the first rocker arm can be adjusted horizontally and vertically on the sash body, and are positioned with the sash body by positioning pieces. The door hinge is easy to install, and does not require strict and precise grooving of the door leaf and the door frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following drawings should be used in conjunction with the detailed description.

[0022] Figure 1 is a three-dimensional schematic diagram of a hidden door hinge in the first embodiment, with the viewing angle being from the rear side;

[0023] Figure 2a It is a three-dimensional schematic diagram of the assembly of the door leaf portion and the first rocker arm in the first embodiment, with the viewing angle being the front side;

[0024] Figure 2b yes Figure 2a A schematic rear view of the assembly shown with the magnetic trim panel removed;

[0025] Figure 2cIt is an exploded schematic diagram of the assembly of the door leaf portion and some parts of the rotating shaft portion in the first embodiment, with the viewing angle being from the rear side;

[0026] Figure 2d yes Figure 2c Another exploded view of the assembly shown, viewed from the front and side;

[0027] Figure 3 It is a three-dimensional schematic diagram of the assembly structure of the frame leaf part and the rotating shaft part in the first embodiment, with the viewing angle being the front side;

[0028] Figure 4 It is an exploded schematic diagram of the frame page portion in the first embodiment, with the viewing angle being from the rear side;

[0029] Figure 5 It is a cross-sectional schematic diagram of the frame page portion in the first embodiment. DETAILED DESCRIPTION

[0030] The embodiments are described below with reference to the accompanying drawings.

[0031] In this specification, unless otherwise specified, one embodiment, some embodiments and other embodiments are used to distinguish different embodiments and do not refer to all embodiments; the accompanying drawings are schematic diagrams, not proportional drawings; the directions / positions indicated by top, bottom, center, edge, inside, outside, far, near, length, width, vertical, horizontal, up, down, front, back, left, right, etc., based on the observation angle of the accompanying drawings, cannot be understood as the components / devices are located in specific positions and facing specific directions; ordinal words such as first, second, third, etc., do not have a sequential meaning when used to distinguish components / devices with the same function / name.

[0032] In this specification, "format" refers to the visible surface of a component at the projection viewing angle with the largest projection area.

[0033] Embodiment 1

[0034] Disclosed is a hidden door hinge, hereinafter referred to as hinge.

[0035] See also Figure 1 The hinge includes a fan leaf portion 100, a frame leaf portion 200 and a shaft portion 300.

[0036] See also Figure 3 , Figure 4 and Figure 5 The frame page part 200 includes: a convex-shaped fixed hinge outer shell 210, a pair of fixed hinge inner seats 220, two magnetic suction plates 240, two permanent magnets 250, two adjusting bolts 232 and two positioning bolts 231.

[0037] The top end of the fixed hinge housing 210 (i.e., the end where the rotating shaft portion 300 extends) is longer and extends in the long axis direction to form a pair of mounting ears 211. Each mounting ear 211 is provided with two waist-shaped through holes for screws or pins to pass through, so that the frame leaf portion 200 can be installed in a door frame groove.

[0038] The enclosed space of the fixed hinge housing 210 forms a convex-shaped receiving groove 210a.

[0039] The top and front side of the receiving groove 210a are configured as openings, so as to facilitate the folding, storage and unfolding of the rotating shaft portion 300; a step 212 is formed at each end of the long axis direction, and a fixed hinge inner seat 220 is movably installed on each end. Two pairs of shaft holes are provided on the opposite sides of the two fixed hinge inner seats 220.

[0040] The fixed hinge inner seat 220 is provided with an adjusting ear 221 on the side facing away from the shaft hole thereof, so as to cooperate with the step 212. The adjusting ear 221 is embedded in the end of the receiving groove 210a and is located above the step 212.

[0041] The adjusting ear 221 is provided with a central threaded through hole 221b and an arcuate top surface notch 221a. The top surface notch 221a matches the shape of the nut of the positioning bolt 231. The adjusting bolt 232 can be countersunk and meshed in the central threaded through hole 221b.

[0042] The end of the adjusting bolt 232 is unthreaded and passes through the central threaded through hole 221b. It is movably sleeved in the copper positioning ring 2321 and can rotate relative to the positioning ring 2321 but not axially displaced. The positioning ring 2321 is fixedly embedded in the fixed hinge housing 210. When the adjusting bolt 232 rotates, it drives the fixed hinge inner seat 220 to move relative to the fixed hinge housing 210, thereby adjusting the depth position of the fixed hinge inner seat 220 in the receiving groove 210a.

[0043] The positioning bolt 231 penetrates into and engages with the fixed hinge housing 210 , and one side of the nut thereof can be embedded in the top surface notch 221 a , thereby limiting the highest position of the adjusting ear 221 .

[0044] Please refer to all the drawings, the rotating shaft portion 300 includes a first rocker arm 310, a second rocker arm 320, a third rocker arm 330 and four rotating shafts.

[0045] A straight strip-shaped avoidance hole is provided in the middle of the first rocker arm 310 , whose cross section is approximately arc-shaped or broken-line-shaped. First bushings are provided at two ends of the avoidance hole to movably mount the first rotating shaft 301 .

[0046] The rear end of the first rocker arm 310 is provided with a second bushing on which the second rotating shaft 302 is movably mounted.

[0047] The second rocker arm 320 has a cross section approximately in the shape of a broken line, with a front end movably connected to the second rotating shaft 302 and a rear end movably connected between a pair of fixed hinge inner seats 220 in the accommodating groove 210a through a fourth rotating shaft 304.

[0048] The third rocker arm 330 has a broken line cross section, a front end of which is movably connected to the first rotating shaft 301 , and a rear end of which is movably installed between a pair of fixed hinge inner seats 220 in the accommodating groove 210a through a third rotating shaft 303 .

[0049] The fourth rotation axis 304 is located between the bottom surface of the receiving groove 210 a and the third rotation axis 303 .

[0050] That is, a bend is provided in the middle of the first rocker arm 310 and is rotatably connected to the front end of the third rocker arm 330, the rear end of the first rocker arm 310 is rotatably connected to the front end of the second rocker arm 320, the rear ends of the second rocker arm 320 and the rear ends of the third rocker arm 330 are respectively rotatably connected between a pair of fixed hinge inner seats 220 in the accommodating groove 210a, and the rear end of the second rocker arm 320 is located below the rear end of the third rocker arm 330; the cross section of the third rocker arm 330 is approximately L-shaped (i.e., a right-angle bend); rotating shafts are respectively provided at the rotatable connection points of the first rocker arm 310, the second rocker arm 320, the third rocker arm 330 and the fixed hinge inner seat 220, the rear end of the first rocker arm 310 is rotatably connected to the front end of the second rocker arm 320 through the second rotating shaft 302, and the rear end of the second rocker arm 320 is rotatably connected to the fixed hinge inner seat 220. The inner seat 220 is rotatably connected via the fourth rotating shaft 304, the front end of the third rocker arm 330 is rotatably connected to the middle of the first rocker arm 310 via the first rotating shaft 301, and the rear end of the third rocker arm 330 is rotatably connected to the fixed hinge inner seat 220 via the third rotating shaft 303; the multi-axis body formed by the first rocker arm 310, the second rocker arm 320 and the third rocker arm 330 can be rotated, folded and stored in the receiving groove 210a, which can reduce the width space occupied by the hinge, and can be unfolded and extended after rotating out of the receiving groove 210a; when the shaft portion 300 rotates and is stored in the receiving groove 210a, the leaf portion 100 rotates and approaches the frame leaf portion 200; when the shaft portion 300 rotates out of the receiving groove and unfolds, the leaf portion 100 rotates and moves away from the frame leaf portion 200. The rotation trajectory of the leaf portion 100 is similar to an involute, so that the door leaf does not collide with the door frame during the opening and closing process.

[0051] See also Figure 2a , Figure 2b , Figure 2c and Figure 2d The leaf portion 100 includes: a leaf body 110 , a clamping plate 120 and two locking bolts 131 .

[0052] The leaf body 110 is configured as a straight strip plate, and the middle of the two widths are respectively set as a first mounting groove 110a and a second mounting groove 110b, and the bottom surfaces of the first mounting groove 110a and the second mounting groove 110b are provided with two first bolt through holes 110c.

[0053] Specifically, the first installation slot 110a and the second installation slot 120a have the same outline shape, both of which are approximately trapezoidal, and the lengths of the sides on both sides of the long axis are different. With this structure, the installation and positioning of the clamping plate 120 and the front end 311 of the first rocker arm are facilitated.

[0054] Permanent magnets 150 are respectively embedded on the back sides of both ends of the leaf body 100 outside the second installation groove 110b. The magnetic decorative plate 140 is magnetically attracted by the permanent magnets 150 and is used to cover the ends of the leaf body 100 and shield the locking bolts 131 and other components.

[0055] Specifically, the leaf body 110 is provided with two two-section through holes, and the permanent magnet 150 is embedded in the larger section of the two-section through holes. Thus, the permanent magnet 150 can be pushed out with a rod-shaped tool for easy replacement.

[0056] Two waist-shaped through holes 110e are respectively provided at the two ends of the leaf body 110. The four waist-shaped through holes 110e are used for screws or pins to pass through the countersunk heads, so that the leaf part 100 can be installed in a door leaf groove.

[0057] The clamping plate 120 is configured as a straight strip plate, is located in the first installation groove 110a with clearance fit, and is provided with two second bolt through holes 120a.

[0058] The front end of the first rocker arm 310 (hereinafter referred to as the first rocker arm front end 311) is configured as a straight strip plate, and is provided with two third bolt through holes 311a, which are clamped and fixed to the two sides of the fan leaf body 110 with the clamping plate 120 respectively, and are located in the second installation groove 110b with clearance fit.

[0059] The locking bolt 131 passes through the third bolt through hole 311a, the first bolt through hole 110c and the second bolt through hole 120a in sequence, has a clearance fit with the first bolt through hole 120a, and transitionally fits or meshes with the second bolt through hole 120a and the third bolt through hole 311a respectively.

[0060] The relative positions of the clamping plate 120 and the front end 311 of the first rocker arm and the leaf body 110 can be adjusted horizontally and vertically, and at least one of them is positioned with the leaf body 110 by a positioning member. The positioning member is configured as the following two pairs of positioning teeth.

[0061] A first longitudinal positioning tooth 160 is provided at the upper end of the bottom surface of the second mounting groove 110 b in the long axis direction.

[0062] A first transverse positioning tooth is provided at the lower end of the bottom surface of the second mounting groove 110 b in the long axis direction.

[0063] The end surface of the front end 311 of the first rocker arm is provided with a second longitudinal positioning tooth 3111 and a second transverse positioning tooth.

[0064] The second longitudinal positioning teeth 3111 cooperate with the first longitudinal positioning teeth 160 and are greater in number than the first longitudinal positioning teeth 160. The second transverse positioning teeth cooperate with the first transverse positioning teeth and are greater in number than the first transverse positioning teeth.

[0065] Please note that the first lateral positioning teeth and the second lateral positioning teeth are not shown in the drawings.

[0066] The locking bolt 131 is countersunk in the third bolt through hole 311a, and the end thereof is exposed from the second bolt through hole 120a, passes through the anti-slip washer and engages with a nut. Before the nut is locked, the leaf body 110 is first installed in the door leaf groove, and then the positions of the clamping plate 120 and the front end 31 of the first rocker arm in the two installation grooves are synchronously adjusted, and finally the locking bolt 131 is rotated to lock the nut.

[0067] The movement trajectory of the hidden door hinge is limited to a preset range, and has the following technical advantages.

[0068] 1) The door leaf does not interfere with the door frame when it is opened and closed, and the gap between the two is small when fully opened and fully closed. The rotating shaft part 300 is a multi-axis body with three rocker arms, which can be rotated, folded and stored in the receiving groove 210a, which can reduce the space occupied by the hinge width, and can be unfolded after rotating out of the receiving groove 210a; when the rotating shaft part 300 rotates and is stored in the receiving groove 210a, the leaf part 100 rotates and approaches the frame leaf part 200; when the rotating shaft part 300 rotates out of the receiving groove and unfolds, the leaf part 100 rotates and moves away from the frame leaf part 200.

[0069] 2) Good safety. The installation edge value is large, and the frame and panel will not be damaged when the door leaf is slotted.

[0070] 3) Easy installation, low requirements on the accuracy of the slotting of the door leaf and door frame. The depth (height) of the fixed hinge inner seat 220 in the receiving groove 210a is adjustable. The horizontal and vertical positions of the clamping plate 120 and the front end 311 of the first rocker arm relative to the leaf body 110 are also adjustable. Therefore, the positions of the door leaf slot and the door frame slot do not strictly correspond to the door hinge, and do not affect the installation.

[0071] In other embodiments, the positioning member may be a positioning pin hole. Positioning pins and positioning holes: both have densely distributed multiples, but the number is different. The positioning pin hole is set at the conflict interface between the clamping plate 120 and the first mounting groove 110a, or at the conflict interface between the front end 311 of the first rocker arm and the second mounting groove. That is: one of the positioning pins and the positioning holes has a redundant number, but both are densely arranged, so as to facilitate the lateral position adjustment and longitudinal position adjustment of the clamping plate 120 and the front end 311 of the first rocker arm.

[0072] In another embodiment, the locking bolt 131 does not engage with the nut, but directly engages with the second bolt through hole 120a to lock the clamping plate 120, the leaf body 110 and the front end 311 of the first rocker arm.

[0073] The above embodiments, application examples and technical analysis are intended to introduce the technical concept and features of the utility model so that those skilled in the art can implement the technical solution of the utility model, and do not constitute any limitation on the protection scope of the utility model. Simple changes and equivalent transformations to the above embodiments are within the protection scope of the utility model.

Claims

1. A concealed door hinge, comprising a leaf portion (100), a frame leaf portion (200) and a rotating shaft portion (300), wherein the frame leaf portion is provided with a receiving groove (210a), and the rotating shaft portion comprises a first rocker arm (310) and can be folded and received in the receiving groove (210a); It is characterized in that The fan leaf portion (100) comprises: A leaf body (110) configured in a straight strip shape, wherein the middle portions of the two widths are respectively provided with a first mounting groove (110a) and a second mounting groove (110b), and the bottom surfaces of the first mounting groove and the second mounting groove are provided with two first bolt through holes (110c); A clamping plate (120) configured as a straight strip plate, located in the first installation groove with clearance fit, and provided with two second bolt through holes (120a); and Locking bolt (131); The front end (311) of the first rocker arm is configured as a straight strip plate, and is provided with two third bolt through holes (311a), which are clamped and fixed to the two sides of the leaf body with the clamping plate, and are located in the second installation groove with clearance fit; The locking bolt (131) passes through the third bolt through hole (311a), the first bolt through hole (110c) and the second bolt through hole (120a), and is clearance-matched with the first bolt through hole; The positions of the clamping plate and the front end of the first rocker arm relative to the sash body can be adjusted horizontally and vertically, and at least one of the two is positioned with the sash body through a positioning piece.

2. The hidden door hinge according to claim 1, characterized in that: The locking bolt (131) is countersunk in the third bolt through hole (311a).

3. The hidden door hinge according to claim 1, characterized in that: The leaf portion further comprises a pair of magnetic decorative plates (140) for shielding the locking bolts; Permanent magnets (150) are respectively embedded on the back sides of both ends of the leaf body outside the second mounting groove; The permanent magnet (150) is used to magnetically attract the magnetic decorative plate (140).

4. The hidden door hinge according to claim 3, characterized in that: The fan leaf body (110) is provided with two two-section through holes; The permanent magnet (150) is embedded in the larger section of the two-section through hole.

5. The hidden door hinge according to claim 1, characterized in that: The first installation groove and the second installation groove have the same contour shape, both of which are approximately trapezoidal, and the lengths of the sides on both sides of the long axis are different.

6. The hidden door hinge according to claim 1, characterized in that: Two waist-shaped through holes (110e) are respectively provided at two ends of the main body of the fan leaf in the long axis direction; The four waist-shaped through holes are used for screws or pins to pass through the countersunk heads, so that the leaf portion can be installed in a door leaf groove.

7. The hidden door hinge according to claim 1, characterized in that: The positioning member is configured as a positioning tooth.

8. The hidden door hinge according to claim 7, characterized in that: The second mounting groove (110b) has a first longitudinal positioning tooth (160) at the upper end in the long axis direction of the bottom surface, and a first transverse positioning tooth at the lower end in the long axis direction of the bottom surface; The end surface of the front end (311) of the first rocker arm is provided with second longitudinal positioning teeth (3111), the second longitudinal positioning teeth cooperate with the first longitudinal positioning teeth and the number of the second longitudinal positioning teeth is greater than the first longitudinal positioning teeth; The end surface of the front end (311) of the first rocker arm is also provided with second transverse positioning teeth, which cooperate with the first transverse positioning teeth and are greater in number than the first transverse positioning teeth.

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