Rotating shaft assembly, door body assembly and refrigerator

Abstract

The utility model provides a rotating shaft assembly, a door body assembly and a refrigerator. The rotating shaft assembly comprises a fixing part; a rotating part; a slide block; and the pressure mechanism is arranged on the fixing part, the sliding block is connected to the pressure mechanism, and the pressure mechanism can provide extrusion force for the sliding block so as to extrude the sliding block towards the wall face of the sliding groove. According to the rotating shaft assembly, the door body assembly and the refrigerator, the pressure mechanism is used for providing extrusion force for the sliding block, so that the sliding block is extruded towards the wall face of the first sliding groove, the friction force between the sliding block and the first sliding groove is increased, and then the rotating damping of the rotating part is increased; the door body connected to the rotating part can stop rotating under the action of rotating damping to achieve hovering, hovering of the door body at multiple angles can be achieved through the length of the first sliding groove, convenience is effectively improved when a user takes and places food, and the use experience of the user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotating structures, in particular to a rotating shaft assembly, a door assembly and a refrigerator. Background Art

[0002] With the popularity of refrigerators in our lives, refrigerators can not only improve the aesthetics of the kitchen but also significantly improve the freshness of food in the kitchen and the quality of life. With the development of the times, people pay more and more attention to the user experience of refrigerators, and the user experience of refrigerators has become one of the core focuses of the industry. In traditional refrigerators, people often need to hold the door with one hand and the other hand to take and put items, or use their bodies to block the refrigerator door to operate. The reason is that the refrigerator cannot stay in the designated position and still moves after the artificially set position.

[0003] In the prior art, refrigerators with a hovering function mainly have a concave design on one side and a convex design on the other side on the mating surface between the door body and the hinge, and the door body can be hovered by the cooperation between the concave and the convex during the opening process of the door body. Although this structure is simple, the concave and the convex are interference fits. During the rotation of the door body, the concave and the convex are always in a state of interference friction, which causes serious wear and tear, resulting in poor reliability and affecting the user experience. Utility Model Content

[0004] In order to solve the technical problem in the prior art that the refrigerator door cannot stay at a designated position and thus affects the user experience, a rotating shaft assembly, a door assembly and a refrigerator are provided which utilize a pressure mechanism to squeeze a slider toward the side wall of a first slide groove to increase the friction between the slider and the first slide groove to achieve the purpose of hovering.

[0005] A rotating shaft assembly, comprising:

[0006] A fixing portion, wherein a first sliding groove is provided on the fixing portion;

[0007] a rotating part, the rotating part being rotatably disposed on the fixing part;

[0008] A slider, the slider is arranged on the rotating part and is located in the first sliding groove, and the slider can move in the first sliding groove as the rotating part rotates;

[0009] A pressure mechanism is arranged on the fixing portion, the slider is connected to the pressure mechanism, and the pressure mechanism can provide a pressing force to the slider to press the slider toward the wall of the slide groove.

[0010] The slider is movably arranged on the rotating part, and the slider is moved to adjust the pressing force provided by the pressure mechanism to the slider.

[0011] The rotating part is provided with a second sliding groove, and the sliding block is slidably matched with the second sliding groove.

[0012] The length direction of the second sliding groove is parallel to the rotation axis of the rotating part.

[0013] The fixing portion is provided with a mounting structure, the pressure mechanism is provided on the mounting structure, and an end of the pressure mechanism away from the mounting structure is connected to the sliding block.

[0014] The first slide groove includes a suspension section and a lifting section connected to each other. Along the direction approaching the suspension section, the distance from the lifting section to the mounting structure gradually decreases, and the slider can slide in the lifting section and the suspension section.

[0015] The suspension section is parallel to a plane where the mounting structure is located; and / or a central angle formed by the suspension section at the central axis of the rotating part is less than 180°.

[0016] The pressure mechanism comprises a spring, a first end of the spring abuts against the mounting structure, and a second end of the spring abuts against the slider.

[0017] The rotating shaft assembly also includes a spring seat, which is movably arranged on the rotating part, the second end of the spring abuts against the spring seat, and the sliding block is arranged on the spring seat.

[0018] An accommodating cavity is formed inside the fixing portion, the rotating portion, the pressure mechanism and the sliding block are all arranged in the accommodating cavity, the first sliding groove is arranged on the inner wall of the accommodating cavity, and the end of the rotating portion protrudes from the accommodating cavity.

[0019] A door body assembly comprises the above-mentioned rotating shaft assembly.

[0020] The door body assembly also includes a door frame and a door body, the fixed part is connected to the door frame, and the door body is connected to the rotating part.

[0021] The first slide slot includes a suspended section and a lifting section that are connected to each other. When the sliding block is at the end of the lifting section away from the suspended section, the door body is in a closed state.

[0022] A refrigerator comprises the above-mentioned rotating shaft assembly or the above-mentioned door assembly.

[0023] The rotating shaft assembly, door body assembly and refrigerator provided by the utility model utilize a pressure mechanism to provide an extrusion force for the slider, thereby squeezing the slider toward the wall of the first slide groove, increasing the friction between the slider and the first slide groove, and further increasing the rotational damping of the rotating part. The door body connected to the rotating part can stop rotating and achieve hovering under the action of the rotational damping, and can utilize the length of the first slide groove to achieve hovering of the door body at multiple angles, effectively improving the convenience of users in taking and placing food and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An exploded view of a shaft assembly provided in an embodiment of the utility model;

[0025] Figure 2 A cross-sectional view of a rotating shaft assembly provided in an embodiment of the utility model;

[0026] Figure 3 Another cross-sectional view of the shaft assembly provided by the embodiment of the utility model;

[0027] Figure 4 A cross-sectional view of a fixing portion of a rotating shaft assembly provided in an embodiment of the utility model;

[0028] Figure 5 A structural perspective view of a fixing portion of a rotating shaft assembly provided in an embodiment of the utility model;

[0029] In the figure:

[0030] 1. Fixed part; 11. First slide groove; 2. Rotating part; 3. Sliding block; 4. Pressure mechanism; 21. Second slide groove; 111. Suspended section; 112. Lifting section; 5. Spring seat; 12. Accommodating chamber. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0032] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] With the popularity of refrigerators in life, refrigerators are a kind of appliance that can not only improve the aesthetics of the kitchen but also significantly improve the freshness of kitchen food and the quality of life. With the development of the times, people pay more and more attention to the user experience of refrigerators, and the user experience of refrigerators has become one of the core focuses of the industry. In traditional refrigerators, when people take and put items, they often need to hold the door with one hand and take and put with the other hand, or use their bodies to block the refrigerator door to operate. The reason is that the refrigerator cannot stay in the designated position and still moves after the position is set manually. In the prior art, refrigerators with a hovering function mainly have a pit design on one side and a convex design on the other side on the mating surface of the door body and the hinge. During the opening process of the door body, the door body is hovered by the cooperation of the pit and the convex. Although this structure is simple, the pit and the convex are interference fits. During the rotation of the door body, the pit and the convex are always in a state of interference friction, and the wear is serious, resulting in poor reliability and affecting the user experience. To this end, the present application provides a kind of Figures 1 to 5The shaft assembly shown includes: a fixed part 1, on which a first slide groove 11 is arranged; a rotating part 2, on which the rotating part 2 is rotatably arranged; a slider 3, on which the slider 3 is arranged, and the slider 3 is located in the first slide groove 11, and the slider 3 can move in the first slide groove 11 as the rotating part 2 rotates; a pressure mechanism 4, which is arranged on the fixed part 1, and the slider 3 is connected to the pressure mechanism 4, and the pressure mechanism 4 can provide an extrusion force to the slider 3 to squeeze the slider 3 toward the wall of the slide groove. The pressure mechanism 4 is utilized to provide an extrusion force for the slider 3, thereby squeezing the slider 3 toward the wall of the first slide groove 11, thereby increasing the friction between the slider 3 and the first slide groove 11, and further increasing the rotational damping of the rotating part 2. The door body connected to the rotating part 2 can stop rotating and hover under the action of the rotational damping, and the length of the first slide groove 11 can be utilized to realize the hovering of the door body at multiple angles, thereby effectively improving the convenience of users in taking and placing food and improving the user experience.

[0037] As an embodiment, the slider 3 is movably arranged on the rotating part 2, and the slider 3 is moved to adjust the extrusion force provided by the pressure mechanism 4 to the slider 3. While the pressure mechanism 4 provides the extrusion force to the slider 3, the slider 3 also provides the extrusion force to the pressure mechanism 4, and the two extrusion forces are of the same magnitude and opposite directions. Therefore, the extrusion force provided by the pressure mechanism 4 can be adjusted by adjusting the position of the slider 3, so that the friction between the slider 3 and the first slide groove 11 can be changed, and then the rotation damping of the rotating part 2 can be adjusted, so that when the rotating part 2 needs to rotate within the set range, the rotation damping is small and the external force requirement is reduced. When the rotating part 2 needs to hover, the rotation damping is increased to limit the rotation of the rotating part 2, thereby improving the working reliability of the rotating assembly. At the same time, the rotation damping can be adjusted by using the movement of the slider 3, without the need for an additional control device, and on the basis of ensuring that the rotating part 2 can rotate and hover reliably, the structural complexity is effectively reduced.

[0038] The rotating part 2 is provided with a second slide groove 21, and the slider 3 is slidably matched with the second slide groove 21. The second slide groove 21 is provided to limit the moving path of the slider 3 on the rotating part 2, thereby ensuring reliable movement of the slider 3, and preventing the slider 3 from moving in an unrestricted direction and causing interference between the slider 3 and the rotating part 2 and the fixed part 1, thereby affecting the reliability of the rotating assembly. Preferably, the length direction of the second slide groove 21 is parallel to the rotation axis of the rotating part 2. At this time, the slider 3 can only move along the rotation axis direction of the rotating part 2, preventing the rotation of the rotating part 2 from affecting the movement of the slider 3, ensuring that the slider 3 can smoothly move along the second slide groove 21 during the rotation of the rotating part 2, and improving the reliability of the shaft assembly.

[0039] The fixing part 1 is provided with a mounting structure, the pressure mechanism 4 is provided on the mounting structure, and the end of the pressure mechanism 4 away from the mounting structure is connected to the slider 3. By providing the mounting structure on the fixing part 1, it is convenient to install the pressure mechanism 4, and at the same time, the movement of the pressure mechanism 4 can be limited to ensure the reliability of the squeezing force generated by the pressure mechanism 4 on the slider 3, thereby ensuring the reliable hovering of the rotating part 2.

[0040] As an embodiment of adjusting the extrusion force of the pressure mechanism 4 by utilizing the movement of the slider 3, the first slide groove 11 includes a suspended section 111 and a lifting section 112 that are connected to each other. Along the direction approaching the suspended section 111, the distance from the lifting section 112 to the mounting structure gradually decreases, and the slider 3 can slide in the lifting section 112 and the suspended section 111. During the sliding process of the slider 3 from the lifting section 112 to the hovering section 111, the slider 3 will gradually approach the mounting structure. While the pressure mechanism 4 provides the slider 3 with an extrusion pressure, the slider 3 will also provide an extrusion pressure to the pressure mechanism 4. The two extrusion pressures are of the same magnitude and opposite in direction. Therefore, the extrusion pressure provided by the pressure mechanism 4 can be adjusted by adjusting the position of the slider 3. At this time, the slider 3 will squeeze the pressure mechanism 4 and the extrusion pressure of the pressure mechanism 4 will gradually increase, thereby achieving the purpose of adjusting the rotational resistance of the rotating part 2. After the slider 3 slides to the hovering section 111, the extrusion pressure of the pressure mechanism 4 on the slider 3 is sufficient to limit the hovering of the rotating part 2, thereby achieving the hovering of the rotating part 2 relative to the fixed part 1. At this time, the slider 3 can continue to slide in the hovering section 111, so that the rotating part 2 can hover at any angle, thereby achieving stepless hovering of the rotating part 2. After the rotating part 2 moves in the opposite direction to the lifting section 112, the pressure increased by the pressure mechanism 4 will be released. At this time, the extrusion force will be decomposed by the inclination angle of the lifting section 112 into a supporting force perpendicular to the lifting section 112 and a driving force parallel to the inclination direction of the lifting section 112. This driving force can drive the slider 3 to move toward the end of the lifting section 112 away from the suspension section 111, and finally move the slider 3 to the end of the lifting section 112 away from the suspension section 111 and stop. In the process of the driving force driving the slider 3 to move, the door body connected to the rotating part 2 can be automatically closed, that is, when the door body is about to be closed on the door frame, the driving force can realize the automatic closing of the door body, and at the same time can also ensure the closing ability of the door body on the door frame, so that the rotating shaft assembly can also achieve the purpose of self-closing effect and increase the sealing effect of the door body.

[0041] Among them, since the slider 3 enters the suspension section 111, the extrusion pressure provided by the pressure mechanism 4 to the slider 3 can meet the rotation restriction of the rotating part 2. Therefore, the suspension section 111 is parallel to the plane where the mounting structure is located. At this time, the movement of the slider 3 will not adjust the extrusion pressure of the pressure mechanism 4, thereby avoiding damage to the pressure mechanism 4 due to excessive extrusion pressure from the slider 3, thereby ensuring reliable operation of the pressure mechanism 4.

[0042] Since the door opening angle of the structure used by the rotating assembly generally does not exceed 180°, for example, the opening angle of the door of a refrigerator will not be greater than 180°, the central angle formed by the suspension section 111 at the central axis of the rotating part 2 is less than 180°. At this time, it can meet the opening angle of the door connected to the rotating part 2, and can also reduce the influence of the first slide groove 11 on the structural stability of the fixed part 1, thereby ensuring the structural reliability of the rotating shaft assembly.

[0043] As an embodiment, the pressure mechanism 4 includes a spring, the first end of the spring abuts against the mounting structure, and the second end of the spring abuts against the slider 3. When the slider 3 is close to the mounting structure, the slider 3 squeezes the spring to increase the elastic force of the spring, and the squeezing force of the spring on the slider 3 is also increased accordingly, thereby being able to adjust the rotation damping of the rotating part 2, so that when the rotating part 2 is required to rotate within a set range, the rotation damping is small and the external force requirement is reduced. When the rotating part 2 is required to hover, the rotation damping is increased to limit the rotation of the rotating part 2, thereby improving the working reliability of the rotating assembly. At the same time, the rotation damping can be adjusted by the movement of the slider 3, without the need for an additional control device, and on the basis of ensuring that the rotating part 2 can rotate and hover reliably, the structural complexity is effectively reduced. The mounting structure can be a platform formed by the change in the cross-sectional area of ​​the fixed part 1.

[0044] In order to facilitate the installation of the spring, the rotating shaft assembly further includes a spring seat 5, which is movably arranged on the rotating part 2, the second end of the spring abuts against the spring seat 5, and the slider 3 is arranged on the spring seat 5. The spring seat 5 is used to support and install the second end of the spring, which facilitates the connection between the spring and the slider 3. Preferably, the spring seat 5 further includes a sleeve structure extending along the rotation axis of the rotating part 2, the sleeve structure is sleeved on the rotating part 2, the spring is sleeved on the sleeve structure, and the compression direction of the spring is limited by the sleeve structure to ensure the working reliability of the spring. At the same time, a slide rail is arranged on the sleeve structure, and the slide rail can be slidably matched with the second slide groove 21, so that the structure in which the slider 3 cooperates with the second slide groove 21 and the first slide groove 11 at the same time is replaced by the slider 3 only cooperating with the first slide groove 11, and the slide rail cooperates with the second slide groove 21, thereby reducing the structural complexity of the slider 3 and facilitating processing and maintenance.

[0045] An accommodating cavity 12 is formed inside the fixed part 1, and the rotating part 2, the pressure mechanism 4 and the slider 3 are all arranged in the accommodating cavity 12. The first slide groove 11 is arranged on the inner wall of the accommodating cavity 12, and the end of the rotating part 2 protrudes from the accommodating cavity 12. The accommodating cavity 12 is used to restrict the pressure mechanism 4 and the slider 3, further avoiding the slider 3 and the pressure mechanism 4 from moving in a non-set path, ensuring the working reliability of the shaft assembly, and the end of the rotating part 2 protruding from the accommodating cavity 12 is connected to the preset structure that needs to be rotated, ensuring the reliable rotation of the preset structure.

[0046] The end of the rotating part 2 protruding from the accommodating cavity 12 is provided with a mounting groove, which is used to connect with the preset structure. At the same time, the shaft diameter of the rotating part 2 located inside the accommodating cavity 12 is reduced to facilitate the installation of the spring and the sleeve structure.

[0047] The inner diameter of the spring seat 5 is slightly smaller than the inner diameter of the accommodating cavity 12, which can ensure the reliable movement of the spring seat 5 in the accommodating cavity 12 and prevent the second end of the spring from escaping from the spring seat 5 through the gap between the spring seat 5 and the accommodating cavity 12, thereby ensuring reliable installation of the spring.

[0048] The first slide groove 11 is arranged on the inner wall of the accommodating cavity 12 , and the first slide groove 11 is located at a position corresponding to the spring seat 5 , and the slider 3 is arranged on the side wall of the spring seat 5 , so that the slider 3 can extend into the first slide groove 11 and slide freely.

[0049] A door body assembly comprises the above-mentioned rotating shaft assembly.

[0050] The door body assembly also includes a door frame and a door body, the fixed part 1 is connected to the door frame, and the door body is connected to the rotating part 2, wherein a limiting block is provided on the outer wall of the fixed part 1, and the fixed part 1 can be fixedly connected to the door frame through the limiting block to avoid the fixed part 1 from rotating relative to the door frame, thereby ensuring the working reliability of the door body assembly.

[0051] The first slide slot 11 includes a suspension section 111 and a lifting section 112 connected to each other. When the slider 3 is at the end of the lifting section 112 away from the suspension section 111, the door body is in a closed state. After the rotating part 2 moves in the opposite direction to the lifting section 112, the pressure added by the pressure mechanism 4 will be released. At this time, the extrusion force will be decomposed by the inclination angle of the lifting section 112 into a supporting force perpendicular to the lifting section 112 and a driving force parallel to the inclination direction of the lifting section 112. This driving force can drive the slider 3 to move toward the end of the lifting section 112 away from the suspension section 111, and finally move the slider 3 to the end of the lifting section 112 away from the suspension section 111 and stop. In the process of the driving force driving the slider 3 to move, the door body connected to the rotating part 2 can be automatically closed, that is, when the door body is about to be closed to the door frame, the driving force can realize the automatic closing of the door body, and at the same time, it can also ensure the closing ability of the door body on the door frame, so that the shaft assembly can also achieve the purpose of self-closing effect and increasing the sealing effect of the door body.

[0052] A refrigerator comprises the above-mentioned rotating shaft assembly or the above-mentioned door assembly.

[0053] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A rotating shaft assembly, characterized in that: include: A fixing portion (1), wherein the fixing portion (1) is provided with a first sliding groove (11); A rotating part (2), the rotating part (2) being rotatably arranged on the fixed part (1); A slider (3), the slider (3) being arranged on the rotating part (2), and the slider (3) being located in the first sliding groove (11), and the slider (3) being able to move in the first sliding groove (11) as the rotating part (2) rotates; A pressure mechanism (4), wherein the pressure mechanism (4) is arranged on the fixed portion (1), the slider (3) is connected to the pressure mechanism (4), and the pressure mechanism (4) is capable of providing a pressing force to the slider (3) so as to press the slider (3) toward the wall of the slide groove.

2. The shaft assembly according to claim 1, characterized in that: The slider (3) is movably arranged on the rotating part (2), and the slider (3) is moved to adjust the pressing force provided by the pressure mechanism (4) to the slider (3).

3. The shaft assembly according to claim 2, characterized in that: The rotating part (2) is provided with a second sliding groove (21), and the sliding block (3) is slidably matched with the second sliding groove (21).

4. The shaft assembly according to claim 3, characterized in that: The length direction of the second sliding groove (21) is parallel to the rotation axis of the rotating part (2).

5. The shaft assembly according to claim 1, characterized in that: The fixing portion (1) is provided with a mounting structure, the pressure mechanism (4) is provided on the mounting structure, and the end of the pressure mechanism (4) away from the mounting structure is connected to the sliding block (3).

6. The shaft assembly according to claim 5, characterized in that: The first slide groove (11) comprises a suspended section (111) and a lifting section (112) which are connected to each other, and the distance between the lifting section (112) and the mounting structure gradually decreases in a direction approaching the suspended section (111), and the sliding block (3) is capable of sliding in the lifting section (112) and the suspended section (111).

7. The shaft assembly according to claim 6, characterized in that: The suspension section (111) is parallel to the plane where the mounting structure is located; and / or the central angle formed by the suspension section (111) at the central axis of the rotating part (2) is less than 180°.

8. The shaft assembly according to claim 5, characterized in that: The pressure mechanism (4) comprises a spring, a first end of the spring abuts against the mounting structure, and a second end of the spring abuts against the slider (3).

9. The shaft assembly according to claim 8, characterized in that: The rotating shaft assembly further comprises a spring seat (5), the spring seat (5) being movably arranged on the rotating part (2), the second end of the spring abutting against the spring seat (5), and the sliding block (3) being arranged on the spring seat (5).

10. The shaft assembly according to claim 1, characterized in that: The fixed portion (1) has an accommodating cavity (12) formed inside, the rotating portion (2), the pressure mechanism (4) and the slider (3) are all arranged in the accommodating cavity (12), the first sliding groove (11) is arranged on the inner wall of the accommodating cavity (12), and the end of the rotating portion (2) protrudes from the accommodating cavity (12).

11. A door assembly, characterized in that: The invention comprises the rotating shaft assembly according to any one of claims 1 to 10.

12. The door assembly according to claim 11, characterized in that: The door body assembly also includes a door frame and a door body, the fixed part (1) is connected to the door frame, and the door body is connected to the rotating part (2).

13. The door assembly according to claim 12, characterized in that: The first sliding groove (11) comprises a suspended section (111) and a lifting section (112) which are connected to each other, and when the sliding block (3) is at the end of the lifting section (112) away from the suspended section (111), the door body is in a closed state.

14. A refrigerator, characterized in that: It comprises the rotating shaft assembly according to any one of claims 1 to 10 or the door body assembly according to any one of claims 11 to 13.

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