Built-in refrigerator equipped with anti-pinch door hinge

Abstract

The present invention relates to the technical field of refrigerators, and discloses a built-in refrigerator equipped with an anti-pinch door gap hinge, comprising a box body, a door body being mounted on the box body via a hinge assembly, the hinge assembly comprising a hinge bracket fixedly connected to the box body, a hinge limit block fixedly connected to the hinge bracket, a hinge shaft being provided on the hinge limit block, a rotating cam and a guide cam being respectively provided on the hinge limit block, and a rotating groove matching the shape of the hinge shaft being provided on the rotating cam; by transforming the rotation axis of the door body, it is ensured that there is sufficient gap between the door seal and the door body to ensure that the door gap is not pinched during the door opening and closing process, and at the same time, it is ensured that the distance of the door body beyond the box body is controlled within the embedded condition range; the guide limit groove cooperates with the guide cam to assist in limiting the movement trajectory of the door body, thereby realizing the embedded requirement of the door body.

Description

Technical Field

[0001] The invention relates to a built-in refrigerator equipped with an anti-pinch door hinge, belonging to the technical field of refrigerators. Background Art

[0002] Built-in refrigerators are popular among consumers because of their integrated design with furniture and cabinets and their neat appearance. Currently, most built-in refrigerators use folding hinges, which are costly and complex to assemble, making them difficult to promote across the board. Existing built-in refrigerators also cannot ensure sufficient clearance between the door seal and the door body, preventing the door from being pinched during opening and closing. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a simple and low-cost anti-door-pinch embedded refrigerator hinge and refrigerator. By changing the rotation axis of the door body, it is ensured that there is sufficient gap between the door seal and the door body to ensure that the door gap is not pinched during the door opening and closing process, and at the same time, the distance between the door body and the cabinet body is controlled within the embedded condition range.

[0004] A built-in refrigerator equipped with an anti-pinch door hinge comprises a box body, a door body is mounted on the box body via a hinge assembly, the hinge assembly comprises a hinge bracket fixedly connected to the box body, a hinge limit block is fixedly connected to the hinge bracket, a hinge shaft is provided on the hinge limit block, a rotating cam and a guide cam are respectively provided on the hinge limit block, and a rotating groove matching the shape of the hinge shaft is provided on the rotating cam; the door body comprises a door body main body, a door body limit block used in conjunction with the hinge assembly is fixedly connected to the door body main body, a rotating limit groove matching the rotating cam is provided on the door body limit block, a guide limit groove matching the guide cam is also provided on the door body limit block, and an axis groove for supporting the rotation of the hinge shaft is provided in the rotating limit groove.

[0005] The following is a further optimization of the above technical solution by the present invention:

[0006] The rotation limiting groove is of irregular shape, and the rotation cam can move in the rotation limiting groove.

[0007] Furthermore: the guide limiting groove is in an arc shape, and the guide cam slides back and forth along the shape of the guide limiting groove.

[0008] Further: the rotating cam is composed of a first rotating cam stop surface and a second rotating cam stop surface which are parallel to each other, and the first rotating cam stop surface and the second rotating cam stop surface are respectively connected by a rotating cam arc transition surface.

[0009] Furthermore: the rotation limiting groove is composed of a limiting surface for limiting the displacement of the rotating cam, a sliding surface for supporting the sliding of the rotating cam, and a stop surface for blocking the sliding of the rotating cam.

[0010] Furthermore: a seal is installed on the inner side of the door body.

[0011] To sum up, when the door body is closed, the rotation limit surface B cooperates with the rotation cam arc transition surface B, the rotation limit surface A cooperates with the rotation cam arc transition surface A, and the guide limit surface H cooperates with the guide cam surface E. The three cooperations determine a stable triangle, which can solve the problem that the gap between the door body and the box body is uneven on the left and right due to the suction of the door seal; at the same time, the guide cam fits in the guide limit groove, which plays a role in correcting the door body and preventing the door body from tilting out of the box body; at this time, the door body rotates to a distance beyond the box body, meeting the embedded requirements.

[0012] In the first step of opening the door, the door body opens from position ① to position ②. At this time, the rotating limit surface A engages with the rotating cam arc transition surface A, and the door body rotates with the rotating cam arc transition surface A on the rotating cam as the axis (the rotating axis of the first step of opening the door). The rotating cam arc transition surface B moves along the rotating sliding surface A, the guide cam surface A moves along the guide limit surface A, and the guide cam surface B moves along the guide limit surface B.

[0013] When the rotating cam arc transition surface B moves along the rotating limit surface A to the rotating limit surface C, the rotating cam arc transition surface B is engaged by the rotating limit surface C, and the first step of opening the door is completed.

[0014] The axis of the arc transition surface A of the rotating cam is designed to not exceed the outer edge of the magnetic strip inside the seal, thereby ensuring that the door body does not get caught when opening and closing. The door gap control line in the state of not getting caught is equivalent to the upper edge position of the door gap in its natural state.

[0015] The design of the door rotation angle in the first step of door opening requires that when the first step of door opening is completed, the outer edge of the door extends beyond the maximum distance L of the box less than L, meeting the embedded requirements.

[0016] In the second step of door opening, the door body opens from position ② to position ③. At this time, the rotating limit surface C engages with the rotating cam arc transition surface B. The door body rotates with the rotating cam arc transition surface B on the rotating cam as the axis (the rotating axis of the second step of door opening). The rotating cam arc transition surface B moves along the rotating sliding surface B, the guide cam surface C moves along the guide limit surface C, and the guide cam surface D moves along the guide limit surface D.

[0017] When the rotating cam arc transition surface A moves along the rotating sliding surface B to the rotating limit surface D, the rotating cam arc transition surface A is engaged by the rotating limit surface D, and the second step of opening the door is completed.

[0018] When rotating with the rotating cam arc transition surface B on the rotating cam as the axis, the second step movement trajectory of the door seal is within the door gap control line when it is not pinching the door gap, thereby ensuring that the door body does not pinch the door gap when it rotates to open and close.

[0019] The design of the door rotation angle in the second step of door opening requires that the outer edge of the door in the second step exceeds the maximum distance L of the box body less than L, meeting the embedded requirements.

[0020] In the third step of door opening, the door body moves from position ③ to position ④ and then to position ⑤. At this time, the rotating limit surface D engages with the rotating cam arc transition surface A, and the door body rotates with the rotating cam arc transition surface A on the rotating cam as the axis (the rotating axis of the third step of door opening). The rotating cam arc transition surface B moves along the rotating sliding surface C, the guide cam surface A moves along the guide limit surface E until it disengages, and the guide cam surface B moves along the guide limit surface F until it disengages.

[0021] When the rotating cam arc transition surface B moves along the rotating sliding surface C to the rotating limit surface E, the rotating cam surface D is restricted from continuing to move by the rotating stop surface B, and the hinge shaft also moves to the rotating limit surface A at this time. The hinge shaft plays a load-bearing and stopping role, and the third step of door opening is completed. The door opening angle is degrees.

[0022] In this state, the door rotates to the maximum distance L beyond the box body, and the design requirement is that L is no more than 5mm.

[0023] The hinge shaft moves in the shaft groove, playing the role of auxiliary guidance and load-bearing support.

[0024] Closing the door is the reverse of opening the door, with the same components interacting with each other.

[0025] The door limit block and hinge limit block are common parts of refrigerators. By optimizing the design of the limit blocks to meet the embedded conditions, the original production process is guaranteed to remain unchanged, the structure is simple, easy to assemble and the cost is low.

[0026] 1. The hinge limit block is provided with a rotating cam and a guide cam. The rotating cam is provided with two flanges that can be used as rotating axes (rotating cam arc transition surfaces). They rotate as rotating support axes during rotation, and the guide cam plays a guiding and limiting role during rotation.

[0027] 2. The door body limit block is provided with a rotation limit groove and a guide limit groove. The rotation limit groove is provided with a rotation limit surface, a rotation sliding surface and a rotation stop surface. The rotation limit surface and the rotation cam cooperate with each other to serve as a rotation support axis in turn, thereby realizing the axis change during the rotation process, adjusting the rotation trajectory of the door body, and realizing the door body embedment requirements. The guide limit groove cooperates with the guide cam to limit the movement trajectory of the door body.

[0028] By changing the door's rotation axis, sufficient clearance between the door seal and the door body is ensured to prevent the door from being pinched during opening and closing, while also ensuring that the distance the door extends beyond the cabinet is within the required in-line range. The guide limit groove and guide cam work together to help limit the door's motion trajectory, achieving the door's in-line requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0030] Figure 1 This is a front view of the refrigerator of the present invention;

[0031] Figure 2 For the present invention Figure 1 A top view of

[0032] Figure 3 Schematic diagram of the structure of the hinge assembly of the present invention;

[0033] Figure 4 Schematic diagram of the structure of the hinge limit block in the present invention;

[0034] Figure 5 Schematic diagram of the structure of the door body of the present invention;

[0035] Figure 6 This is a schematic structural diagram of the door body limiting block in the present invention;

[0036] Figure 7 This is a schematic diagram of the closed door state of the present invention;

[0037] Figure 8 This is a schematic diagram of the cooperation between the hinge limit block and the door limit block in the closed door state of the present invention;

[0038] Figure 9 This is a schematic diagram of the first step of opening the door according to the present invention;

[0039] Figure 10 This is a schematic diagram of the cooperation between the hinge limit block and the door limit block in the first step of opening the door in the present invention;

[0040] Figure 11 This is a schematic diagram of the second step of opening the door according to the present invention;

[0041] Figure 12 This is a schematic diagram of the cooperation between the hinge limit block and the door limit block in the second step of opening the door in the present invention;

[0042] Figure 13 This is a schematic diagram of the third step of opening the door according to the present invention;

[0043] Figure 14 Schematic diagram of the coordination between the hinge limit block and the door limit block in the third step of door opening in the present invention;

[0044] Figure 15 This is a schematic diagram of the door opening completion state of the present invention;

[0045] Figure 16 This is a schematic diagram of the cooperation between the hinge limit block and the door limit block in the door opening completion state in the present invention. DETAILED DESCRIPTION

[0046] Referring to the accompanying drawings, Figure 1-4 As shown, a built-in refrigerator equipped with an anti-pinch door hinge includes a box body 1, a door body 3 is installed on the box body 1 through a hinge assembly 2, the hinge assembly 2 includes a hinge bracket 21 fixed to the box body 1, a hinge limit block 23 is fixed to the hinge bracket 21, a hinge shaft 22 is provided on the hinge limit block 23, a rotating cam 231 and a guide cam 232 are respectively provided on the hinge limit block 23, and the rotating cam 231 is provided with a hinge shaft 22. 2; the door body 3 includes a door body main body 31, on which is fixedly connected a door body limiting block 32 used in conjunction with the hinge assembly 2, and the door body limiting block 32 is provided with a rotation limiting groove 321 matching the rotating cam 231, and the door body limiting block 32 is also provided with a guide limiting groove 322 matching the guide cam 232, and an axis groove 323 for supporting the rotation of the hinge shaft 22 is opened in the rotation limiting groove 321.

[0047] The rotation limiting groove 321 has an irregular shape, and the rotation cam 231 can move in the rotation limiting groove 321 .

[0048] The guide limiting groove 322 is in an arc shape, and the guide cam 232 slides back and forth along the shape of the guide limiting groove 322 .

[0049] The rotating cam 231 is composed of a rotating cam first stop surface 2311 and a rotating cam second stop surface 2312 which are parallel to each other, and the rotating cam first stop surface 2311 and the rotating cam second stop surface 2312 are respectively connected by a rotating cam arc transition surface.

[0050] The rotating cam arc transition surface is divided into two transition surfaces: a rotating cam arc transition surface A29 and a rotating cam arc transition surface B28.

[0051] The guide cam 232 is an irregular protrusion composed of a guide cam surface A2321, a guide cam surface B2322, a guide cam surface C2323, a guide cam surface D2324, and a guide cam surface E2325.

[0052] like Figure 5 、 6As shown, the rotation limiting groove 321 is composed of a limiting surface for limiting the displacement of the rotating cam 231 , a sliding surface for supporting the sliding of the rotating cam 231 , and a stopping surface for blocking the sliding of the rotating cam 231 .

[0053] For the convenience of representation, the limiting surfaces are marked as rotation limiting surface A3211, rotation limiting surface B3212, rotation limiting surface C3213, rotation limiting surface D3214 and rotation limiting surface E3215 in the figure; the sliding surfaces are marked as rotation sliding surface A61, rotation sliding surface B62 and rotation sliding surface C63; the stop surfaces are marked as rotation stop surface A71, rotation stop surface B72 and rotation stop surface C73.

[0054] The guide limit groove 322 is divided into a guide limit surface A91, a guide limit surface B92, a guide limit surface C93, a guide limit surface D94, a guide limit surface E95, a guide limit surface F96, a guide limit surface G97, and a guide limit surface H98 in sequence, and the above-mentioned multiple guide limit surfaces are connected to each other.

[0055] A seal 33 is installed on the inner side of the door body 31 .

[0056] like Figure 7-16 As shown in the figure, the five special positions of the door body 3 during the door opening process are shown as ①, ②, ③, ④, and ⑤. ① to ② is the first step of door opening, ② to ③ is the second step of door opening, and ③ to ④ and then to ⑤ is the third step of door opening.

[0057] ① is a schematic diagram of the closed state of the door body 3. At this time, the rotation limit surface B3212 cooperates with the rotation cam arc transition surface B28, the rotation limit surface A3211 cooperates with the rotation cam arc transition surface A29, and the guide limit surface H98 cooperates with the guide cam surface E2325. The three cooperations determine a stable triangle, which can solve the problem that the gap between the door body 3 and the box body 1 is uneven on the left and right due to the suction of the door seal 33; at the same time, the guide cam 232 fits in the guide limit groove 322, which plays a role in correcting the door body 3 and preventing the door body 3 from tilting and deviating from the box body 1; at this time, the door body 3 rotates to a distance beyond the box body 1, meeting the embedded requirements.

[0058] In the first step of opening the door, the door body 3 opens from position ① to position ②. At this time, the rotating limit surface A3211 engages with the rotating cam arc transition surface A29, and the door body 3 rotates with the rotating cam arc transition surface A29 on the rotating cam 231 as the axis (the rotating axis of the first step of opening the door), and the rotating cam arc transition surface B28 moves along the rotating sliding surface A61, the guide cam surface A2321 moves along the guide limit surface A91, and the guide cam surface B2322 moves along the guide limit surface B92.

[0059] like Figure 10As shown, when the rotating cam arc transition surface B28 moves along the rotating limit surface A3211 to the rotating limit surface C3213, the rotating cam arc transition surface B28 is engaged by the rotating limit surface C3213, and the first step of opening the door body 3 is completed.

[0060] like Figure 8 As shown, the axis of the rotating cam arc transition surface A29 is designed to not exceed the outer edge of the inner magnetic strip of the seal 33, thereby ensuring that the door body 3 does not pinch the door gap when it is rotated to open and close. The door gap control line in the non-pinching state is equivalent to the upper edge position of the door gap in the natural state.

[0061] like Figure 11 、 12 As shown, the design of the rotation angle of the door body 3 in the first step of opening the door requires that when the first step of opening the door body 3 is completed, the outer edge of the door body 3 extends beyond the box body 1 by a maximum distance L1 less than L, meeting the embedded requirements.

[0062] See also Figure 9-12 In the second step of door opening, the door body 3 opens from position ② to position ③. At this time, the rotation limit surface C3213 engages the rotation cam arc transition surface B28. The door body 3 rotates with the rotation cam arc transition surface B28 on the rotation cam 231 as the axis (the rotation axis of the second step of door opening). The rotation cam arc transition surface B28 moves along the rotation sliding surface B62, the guide cam surface C2323 moves along the guide limit surface C93, and the guide cam surface D2324 moves along the guide limit surface D94. Figure 12 As shown, when the rotating cam arc transition surface A29 moves along the rotating sliding surface B62 to the rotating limit surface D3214, the rotating cam arc transition surface A29 is engaged by the rotating limit surface D3214, and the second step of opening the door body 3 is completed.

[0063] like Figure 12 As shown, when the rotating cam arc transition surface B28 on the rotating cam 231 is rotated as the axis, the second step movement trajectory of the door seal 33 is within the door gap control line when it is not clamped in the door gap, thereby ensuring that the door body 3 does not clamp in the door gap when it is rotated to open and close. Figure 12 、 14 As shown, the design of the rotation angle of the door body 3 in the second step of opening the door requires that the outer edge of the door body 3 in the second step of opening the door exceeds the maximum distance L2 of the box body 1 by less than L, meeting the embedded requirements.

[0064] like Figure 13-16As shown, in the third step of opening the door, the door body 3 moves from position ③ to position ④ and then to position ⑤. At this time, the rotating limit surface D3214 engages with the rotating cam arc transition surface A29, and the door body 3 rotates with the rotating cam arc transition surface A29 on the rotating cam 231 as the axis (the rotating axis of the third step of opening the door), and the rotating cam arc transition surface B28 moves along the rotating sliding surface C63, and the guide cam surface A2321 moves along the guide limit surface E95 until it disengages, and the guide cam surface B2322 moves along the guide limit surface F96 until it disengages.

[0065] like Figure 16 As shown, when the rotating cam arc transition surface B28 moves along the rotating sliding surface C63 to the rotation limit surface E3215, the rotating cam 231 surface D is restricted from continuing to move by the rotating stop surface B72, and the hinge shaft also moves to the rotation limit surface A3211 at this time. The hinge shaft plays a load-bearing and stopping role, and the third step of opening the door body 3 is completed. The opening angle of the door body 3 is 90 degrees.

[0066] like Figure 14 As shown, in this state, the door body 3 rotates to a maximum distance L beyond the box body 1, and the design requirement is that L is not greater than 5 mm.

[0067] The hinge shaft moves in the shaft groove 323, playing the role of auxiliary guidance and load-bearing support.

[0068] Closing the door is the reverse of opening the door, with the same components interacting with each other.

[0069] The door limit block 32 and the hinge limit block 23 are conventional components of the refrigerator. By optimizing the design of the limit blocks to meet the embedded conditions, the original production process is guaranteed to remain unchanged, the structure is simple, easy to assemble, and the cost is low.

[0070] 1. The hinge limit block 23 is provided with a rotating cam 231 and a guide cam 232. The rotating cam 231 has two flanges (rotating cam arc transition surfaces) that can serve as rotating axes. They rotate as rotating support axes, and the guide cam 232 serves as a guide and limiter during rotation.

[0071] 2. A rotation limiting groove 321 and a guide limiting groove 322 are provided on the door body limiting block 32. A rotation limiting surface, a rotation sliding surface and a rotation stop surface are provided on the rotation limiting groove 321. The rotation limiting surface cooperates with the rotating cam 231 to take turns as a rotation support axis, thereby realizing the axis change during the rotation process, adjusting the rotation trajectory of the door body 3, and realizing the embedded requirement of the door body 3. The guide limiting groove 322 cooperates with the guide cam 232 to limit the movement trajectory of the door body 3.

[0072] By changing the rotation axis of the door body 3, sufficient clearance is ensured between the door seal 33 and the door body 3 to prevent the door from being pinched during opening and closing, while also ensuring that the distance the door body 3 extends beyond the cabinet 1 is within the required range for internal insertion. The guide limit groove 322 and the guide cam 232 cooperate to help limit the movement trajectory of the door body 3, achieving the internal insertion requirement of the door body 3.

[0073] In summary, the present invention is not limited to the above specific embodiments. Those skilled in the art may make several changes and modifications without departing from the spirit and scope of the present invention, and all such changes should fall within the scope of protection of the present invention.

Claims

1. A built-in refrigerator equipped with an anti-pinch door hinge, comprising a cabinet, a door mounted on the cabinet via a hinge assembly, characterized in that: The hinge assembly includes a hinge bracket fixedly connected to the box body, a hinge limit block fixedly connected to the hinge bracket, a hinge shaft provided on the hinge limit block, a rotating cam and a guide cam provided on the hinge limit block, and a rotating groove matching the shape of the hinge shaft provided on the rotating cam; The door body includes a door body main body, a door body limiting block used in conjunction with the hinge assembly is fixedly connected to the door body main body, a rotation limiting groove matching the rotation cam is provided on the door body limiting block, a guide limiting groove matching the guide cam is further provided on the door body limiting block, and an axis groove for supporting the rotation of the hinge shaft is opened in the rotation limiting groove; The rotation limiting groove is composed of a rotation limiting surface for limiting the displacement of the rotation cam, a sliding surface for supporting the sliding of the rotation cam, and a rotation stop surface for blocking the sliding of the rotation cam. The rotation cam moves in the rotation limiting groove. The rotating cam is provided with a first rotating cam stop surface and a second rotating cam stop surface which are parallel to each other, and the first rotating cam stop surface and the second rotating cam stop surface are respectively connected by a rotating cam arc transition surface; The guide limiting groove is in an arc shape, and the guide cam slides back and forth along the shape of the guide limiting groove; The guide cam is composed of a guide cam surface A, a guide cam surface B, a guide cam surface C, a guide cam surface D, and a guide cam surface E to form an irregular protrusion; The rotation limiting surface is divided into a rotation limiting surface A, a rotation limiting surface B, a rotation limiting surface C, a rotation limiting surface D and a rotation limiting surface E; the sliding surface is divided into a rotation sliding surface A, a rotation sliding surface B and a rotation sliding surface C; the rotation stop surface is divided into a rotation stop surface A, a rotation stop surface B and a rotation stop surface C; The guide limiting groove is divided into a guide limiting surface A, a guide limiting surface B, a guide limiting surface C, a guide limiting surface D, a guide limiting surface E, a guide limiting surface F, a guide limiting surface G, and a guide limiting surface H in sequence, and the plurality of guide limiting surfaces are connected to each other; In the first step of door opening, the rotating limit surface A engages with the rotating cam arc transition surface A, and the door body rotates with the rotating cam arc transition surface A on the rotating cam as the axis. The rotating cam arc transition surface B moves along the rotating sliding surface A, the guide cam surface A moves along the guide limit surface A, and the guide cam surface B moves along the guide limit surface B. When the rotating cam arc transition surface B moves along the rotating limit surface A to the rotating limit surface C, the rotating cam arc transition surface B is engaged with the rotating limit surface C, and the first step of door opening is completed. In the second step of door opening, the rotating limit surface C engages with the rotating cam arc transition surface B, and the door body rotates with the rotating cam arc transition surface B on the rotating cam as the axis. The rotating cam arc transition surface B moves along the rotating sliding surface B, the guide cam surface C moves along the guide limit surface C, and the guide cam surface D moves along the guide limit surface D. When the rotating cam arc transition surface A moves along the rotating sliding surface B to the rotating limit surface D, the rotating cam arc transition surface A is engaged with the rotating limit surface D, and the second step of door opening is completed. In the third step of door opening, the rotating limit surface D engages with the rotating cam arc transition surface A, and the door body rotates with the rotating cam arc transition surface A on the rotating cam as the axis. The rotating cam arc transition surface B moves along the rotating sliding surface C, and the guide cam surface A moves along the guide limit surface E until it disengages. The guide cam surface B moves along the guide limit surface F until it disengages. When the rotating cam arc transition surface B moves along the rotating sliding surface C to the rotating limit surface E, the rotating cam surface D is restricted from continuing to move by the rotating stop surface B, and the hinge shaft also moves to the rotating limit surface A at this time. The hinge shaft plays a load-bearing and stopper role, and the third step of door opening is completed, and the door opening angle is 90 degrees. When the door body is closed, the rotation limit surface B cooperates with the rotation cam arc transition surface B, the rotation limit surface A cooperates with the rotation cam arc transition surface A, and the guide limit surface H cooperates with the guide cam surface E. The three cooperations determine a stable triangle; at the same time, the guide cam fits in the guide limit groove.

2. A built-in refrigerator equipped with an anti-pinch door hinge according to claim 1, characterized in that : A seal is installed on the inner side of the door body.

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