Open lid buffer structure and rice cooker

Abstract

The present invention relates to an opening buffer structure and a rice cooker. The opening buffer structure includes a buffer block, and the buffer block includes a first end and a second end which are oppositely distributed; the first end of the buffer block is arranged on the cover body, and the second end of the buffer block includes a counteracting surface, a transition surface and a stopping surface which are connected in sequence from top to bottom. There is a first preset angle between the counteracting surface and the transition surface, and there is a second preset angle between the transition surface and the stopping surface; during the opening process of the cover body, the counteracting surface and the transition surface are successively in frictional contact with the housing hinged to the cover body; when the cover body is opened to a preset opening degree, the stopping surface abuts against the housing so that the cover body stops rotating. The present invention can ensure the smooth opening process of the rice cooker, thereby improving the use performance of the rice cooker.

Description

Technical Field

[0001] The present invention relates to the field of household appliances, and particularly to an opening cover buffering structure and a rice cooker. Background Art

[0002] At present, the rice cookers on the market generally include a housing and a cover body. One end of the cover body is hinged to one end of the housing through a rotating shaft, and a torsion spring is sleeved on the rotating shaft. Two spring feet of the torsion spring are respectively abutted against the housing and the cover body, and the other end of the cover body is connected to the other end of the housing through an opening cover mechanism. When in use, by pressing the opening cover mechanism, the cover body will automatically bounce open under the action of the torsion spring. However, since the bouncing speed of the cover body is determined by the torsion force of the torsion spring, if the torsion force of the torsion spring is too large, when the user opens the cover body, the bouncing speed of the cover body is too large, which will apply a large impact force to the housing, making the opening process of the rice cooker unstable and reducing its service performance. Summary of the Invention

[0003] Based on this, in view of the problem of unstable opening process of the rice cooker cover, it is necessary to provide an opening cover buffering structure and a rice cooker.

[0004] An opening cover buffering structure, the opening cover buffering structure includes: a buffer block, the buffer block includes a first end and a second end which are distributed oppositely;

[0005] The first end of the buffer block is arranged on the cover body;

[0006] The second end of the buffer block includes: a cancellation surface, a transition surface, and a stop surface which are connected in sequence from top to bottom. There is a first preset angle between the cancellation surface and the transition surface, and there is a second preset angle between the transition surface and the stop surface;

[0007] During the opening process of the cover body, the cancellation surface and the transition surface are sequentially in frictional contact with the housing hinged to the cover body;

[0008] When the cover body is opened to a preset opening degree, the stop surface abuts against the housing to make the cover body stop rotating.

[0009] In one of the embodiments, the cancellation surface and the transition surface are respectively arranged as arc surface structures adapted to the outer contour of the housing;

[0010] The stop surface is arranged as a plane structure.

[0011] In one of the embodiments, the preset opening degree of the cover body is 60° - 80°;

[0012] The transition surface: includes a first end connected to the connection end of the cancellation surface and a second end connected to the connection end of the stop surface;

[0013] The first preset angle formed by the tangent plane of the first end of the transition surface and the tangent plane of the connecting end of the offset surface is 30° to 40°;

[0014] The second preset angle formed by the tangent plane of the second end of the transition surface and the stop surface is 20° to 30°.

[0015] In one embodiment, the cover opening buffer structure further includes: an elastic member, and the first end of the buffer block is fixed to the cover body through the elastic member;

[0016] When the cover is closed, the elastic member is in a natural state;

[0017] During the opening process of the cover body, the elastic member is in a compressed state;

[0018] When the cover is opened to the preset opening, the elastic member is compressed to a limit state.

[0019] In one embodiment, the cover opening buffer structure further comprises: a first guide member fixed on the cover body, the first guide member having a guide channel, the guide channel extending along the compression direction of the elastic member;

[0020] The first end of the buffer block extends out of the guide channel and is connected to the elastic member, so that the buffer block slides along the guide channel.

[0021] In one embodiment, the buffer block comprises: a buffer body, a sliding portion and a connecting portion connected in sequence;

[0022] The buffer body is distributed close to the shell;

[0023] The sliding portion is slidably disposed in the guide channel;

[0024] The connecting portion is coaxially distributed with the sliding portion, and the connecting portion is connected to the elastic member.

[0025] In one embodiment, the buffer body is made of a damping material, or the free end surface of the buffer body is covered with a damping layer.

[0026] In one embodiment, the buffer body has a balancing hole, and the balancing hole is used to keep the buffer block in an upright state during the sliding process.

[0027] In one embodiment, a second guide member is provided on a side wall of the first guide member facing away from the elastic member, and the second guide member cooperates with the cover body to form a guide cavity, and the guide cavity extends along a compression direction away from the elastic member;

[0028] The buffer body is slidably disposed in the guiding cavity.

[0029] In one embodiment, the elastic member is a spring;

[0030] One end of the connecting portion facing away from the sliding portion is arranged in a frustum of a cone structure, and the diameter of the frustum of the cone structure gradually decreases along the direction from the buffer body to the sliding portion;

[0031] One end of the elastic member is sleeved on the frustum of the cone structure by an interference fit.

[0032] In one embodiment, a clamping groove is formed on the frustum of the cone structure, and one end of the elastic member is embedded in the clamping groove.

[0033] In one embodiment, the elastic member is a spring;

[0034] The opening cover buffer structure further includes: a fixing member disposed on the cover body, and the fixing member extends towards the connecting portion;

[0035] One end of the elastic member facing away from the connecting portion is sleeved on the fixing member.

[0036] An opening cover buffer structure, the opening cover buffer structure includes: a buffer block and an elastic member;

[0037] The buffer block includes a first end and a second end which are oppositely distributed, the elastic member is fixed between the first end of the buffer block and the cover body, the second end of the buffer block includes at least one first side surface and a second side surface located above the at least one first side surface which are sequentially distributed from top to bottom, and an included angle is formed between adjacent two side surfaces;

[0038] When the cover body is closed, the elastic member is in a natural state;

[0039] During the process of opening the cover body, the at least one first side surface is in frictional contact with the housing hinged to the cover body in sequence, and at the same time the elastic member is in a compressed state;

[0040] When the cover body is opened to a preset opening degree, the second side surface abuts against the housing, so that the cover body stops rotating, and at the same time the elastic member is compressed to an extreme state.

[0041] An electric rice cooker, the electric rice cooker includes: a cover body, a housing and the opening cover buffer structure according to any one of the above;

[0042] The cover body and the housing respectively include a first end and a second end that are oppositely distributed. The first end of the cover body is hinged to the first end of the housing through a rotating shaft, and the second end of the cover body is connected to the second end of the housing through an opening mechanism. A torsion spring is sleeved on the rotating shaft, and two spring legs of the torsion spring respectively abut against the cover body and the housing;

[0043] The buffer block of the opening buffer structure is arranged on the cover body.

[0044] In one of the embodiments, the number of the opening buffer structures is two, and the two opening buffer structures are symmetrically distributed on both sides of the central axis of the cover body.

[0045] As described above for the opening buffer structure and the rice cooker, during the process of the cover body being bounced open, the counteracting surface and the transition surface of the buffer block are successively in frictional contact with the housing to apply a frictional force to the housing. At the same time, the elastic member indirectly applies a reaction force to the housing due to being compressed by the buffer block, which can effectively offset the torsion force of the torsion spring on the rice cooker, and further can effectively eliminate the impact force received by the housing during the opening process, achieving the buffer and shock absorption of the rice cooker to the greatest extent. In addition, during the process that the cover body continues to be bounced open due to its own inertia until the stopping surface of the buffer block abuts against the housing, since there is a transition surface between the counteracting surface and the stopping surface, it can be avoided that the housing directly abuts against the stopping surface after being in frictional contact with the counteracting surface of the buffer block, making the opening process of the rice cooker stable, and further improving the use performance of the rice cooker. In summary, the above-described opening buffer structure and rice cooker can not only achieve the buffer and shock absorption of the rice cooker to the greatest extent, but also ensure the stability of the opening process of the rice cooker, thereby improving the use performance of the rice cooker. Description of the Drawings

[0046] The drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0048] Figure 1 It is a top view of a rice cooker equipped with an opening buffer structure provided by an embodiment of the present invention;

[0049] Figure 2 It is Figure 1 A partial enlarged view at A;

[0050] Figure 3 It is a schematic structural diagram of a cover body equipped with an opening cover buffer structure provided by an embodiment of the present invention;

[0051] Figure 4 is Figure 3 a partial enlarged view at B;

[0052] Figure 5 、 Figure 6 It is a schematic structural diagram of a buffer block provided by an embodiment of the present invention.

[0053] Among them, the descriptions of each label in the attached drawings are as follows:

[0054] 100 - opening cover buffer structure, 110 - buffer block, 110a - counteracting surface, 110b - transition surface, 110c - stopping surface, α1 - first preset angle, α2 - second preset angle, 111 - buffer body, 111a - balance hole, 112 - sliding part, 113 - connecting part, 113a - clamping groove, 120 - elastic part, 130 - first guiding part, 130a - guiding channel, 140 - second guiding part, 140a - guiding cavity, 150 - fixing part;

[0055] 200 - cover body, 210 - ear plate, 220 - installation side wall, 230 - reinforcing plate;

[0056] 300 - housing, 310 - supporting surface ring, 320 - connecting cylinder, 330 - reinforcing plate. Detailed implementation manners

[0057] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the attached drawings and embodiments. The following description of the detailed implementation manners is only exemplary, and it should be understood that the specific implementation described here is only used to explain the present invention, and is by no means a limitation to the present invention and its application or use.

[0058] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. On the contrary, when an element is referred to as being "directly" connected to another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0059] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0060] An embodiment of the present invention provides an opening cover buffering structure, as Figure 1 shown, the opening cover buffering structure 100 includes: a buffer block 110, and the buffer block 110 includes a first end and a second end which are distributed oppositely. Further, as Figure 2 and Figure 3 shown, the first end of the buffer block 110 is arranged on the cover body 200; as Figures 4 to 6 shown, the second end of the buffer block 110 includes: a cancellation surface 110a, a transition surface 110b, and a stop surface 110c which are connected in sequence from top to bottom, and there is a first preset angle α1 between the cancellation surface 110a and the transition surface 110b (see Figure 5 ), and there is a second preset angle α2 between the transition surface 110b and the stop surface 110c (see Figure 5 ); during the opening process of the cover body 200, the cancellation surface 110a and the transition surface 110b are in frictional contact with the housing 300 hinged to the cover body 200 in sequence; when the cover body 200 is opened to a preset opening degree, the stop surface 110c abuts against the housing 300, so that the cover body 200 stops rotating.

[0061] It should be noted that the opening cover buffering structure 100 involved in the present invention can be applied to household appliances, for example, rice cookers. Among them, as Figure 1 shown, two ear plates 210 are arranged on the cover body 200 of the rice cooker at intervals; the housing 300 of the rice cooker includes: a housing body (not shown in the drawings) and a support surface ring 310 covered on the top of the housing body, and the support surface ring 310 is hinged to the cover body 200 through a rotating shaft. Among them, two connecting cylinders 320 are arranged on the support surface ring 310 at intervals, and the two connecting cylinders 320 are located between the two ear plates 210 of the cover body 200, and the rotating shaft passes through the two ear plates 210 and the two connecting cylinders 320 in sequence. In addition, a reinforcing plate 330 is connected between the two connecting cylinders 320. During the process of the cover body 200 being bounced open, the cancellation surface 110a and the transition surface 110b are in frictional contact with the reinforcing plate 330 of the rice cooker in sequence, and when the cover body 200 is opened to a preset opening degree, the stop surface 110c also abuts against the reinforcing plate 330 of the rice cooker to prevent the cover body 200 from continuing to rotate, so that the cover body 200 stops rotating at the preset opening degree.

[0062] The working process of the lid-opening buffer structure 100 installed on the rice cooker will be described below:

[0063] When the lid 200 of the rice cooker is popped open by the lid-opening mechanism of the rice cooker, the second end of the buffer block 110 also slides on the reinforcement plate 330 of the support surface ring 310 of the housing 300 as the lid 200 rotates. During the sliding process of the buffer block 110, the counteracting surface 110a and the transition surface 110b come into frictional contact with the reinforcement plate 330 on the support surface ring 310 in sequence, so as to apply a frictional force opposite to the torsion spring torque of the rice cooker to the reinforcement plate 330. When the balanced part of the stop surface 110c (i.e., the intersection part of the transition surface 110b and the stop surface 110c) comes into frictional contact with the reinforcement plate 330, the frictional force generated by this balanced part can completely offset the torsion spring torque of the rice cooker, making the rice cooker in a force balance state. After that, the lid 200 continues to rotate due to inertia until it rotates to the preset opening degree and the stop surface 110c abuts against the reinforcement plate 330 of the housing 300, causing the lid 200 to stop rotating. At this time, the lid-opening process of the lid 200 is completed.

[0064] As described above for the lid-opening buffer structure 100, during the process of the lid 200 being popped open, the counteracting surface 110a and the transition surface 110b of the buffer block 110 come into frictional contact with the housing 300 in sequence, so as to apply a frictional force in the direction opposite to the torsion spring torque direction of the rice cooker to the housing 300, which can offset the torsion spring torque on the rice cooker, and further can eliminate the impact force received by the housing 300 during the lid-opening process, avoiding the vibration of the rice cooker during the lid-opening process; in addition, during the process that the lid 200 continues to be popped open due to its own inertia until the stop surface 110c of the buffer block 110 abuts against the housing 300, since there is a transition surface 110b between the counteracting surface 110a and the stop surface 110c, it can be avoided that the housing 300 directly abuts against the stop surface 110c after coming into frictional contact with the counteracting surface 110a of the buffer block 110, making the lid-opening process of the rice cooker stable, and further improving the service performance of the rice cooker.

[0065] As Figures 4 to 6 shown, in some embodiments of the present invention, the counteracting surface 110a and the transition surface 110b are respectively arranged as arc surface structures adapted to the outer contour of the housing 300; the stop surface 110c is arranged as a planar structure. In this way, during the process of opening the lid 200, due to their arc surface structures, the counteracting surface 110a and the transition surface 110b can come into frictional contact with the reinforcement plate 330 of the housing 300 with the largest area respectively, and further can effectively offset the torsion spring torque of the rice cooker; when the lid 200 is opened to the preset opening degree, the planar stop surface 110c can realize the stop function for the lid 200, which can simplify the structure of the stop surface 110c, and further reduce the processing difficulty of the buffer block 110.

[0066] Optionally, the preset opening degree of the cover body 200 is 60° to 80° (for example, it can be 60°, 65°, 70°, 75°, 80°, etc.); the transition surface 110b includes: a first end connected to the connection end of the counteracting surface 110a and a second end connected to the connection end of the stopping surface 110c; the first preset angle α1 formed between the tangent plane of the first end of the transition surface 110b and the tangent plane of the connection end of the counteracting surface 110a is 30° to 40° (for example, it can be 30°, 32°, 34°, 36°, 38°, 40°, etc.); the second preset angle α2 formed between the tangent plane of the second end of the transition surface 110b and the stopping surface 110c is 20° to 30° (for example, it can be 20°, 22°, 24°, 26°, 28°, 30°, etc.). In this way, by setting the sizes of the first preset angle α1 and the second preset angle α2 based on the opening degree of the cover body 200, it can not only ensure that the cover body 200 stops rotating when it rotates to the preset opening degree, but also ensure the smooth opening process of the rice cooker.

[0067] As Figures 1 to 4 shown, in some embodiments of the present invention, the opening cover buffer structure 100 further includes: an elastic member 120, and the first end of the buffer block 110 is fixed on the cover body 200 through the elastic member 120; when the cover body 200 is closed, the elastic member 120 is in a natural state; during the opening process of the cover body 200, the elastic member 120 is in a compressed state; when the cover body 200 is opened to the preset opening degree, the elastic member 120 is compressed to the limit state. In this way, during the opening process of the cover body 200 of the rice cooker, due to the distance L between the installation side wall 220 and the reinforcement plate 330 connected to the elastic member 120 in the cover body 200 (see Figure 2)Gradually decreasing, the first end of the buffer block 110 will gradually compress the elastic member 120 towards the mounting side wall 220 of the cover body 200, causing the elastic member 120 to deform. The elastic member 120 will then exert a reaction force on the reinforcement plate 330 of the housing 300 through the buffer block 110. The housing 300 is subjected to the dual action of the frictional force exerted by the buffer block 110 and the reaction force exerted by the elastic member 120, and is not prone to small-amplitude vibrations during the process of opening the cover, thereby achieving the effect of damping the rice cooker. Additionally, if the buffer block 110 is directly fixed to the cover body 200, since the installation space of the buffer block 110 will gradually decrease during the process of opening the cover body 200, the buffer block 110 will gradually be squeezed and deformed and at the same time generate a frictional force on the reinforcement plate 330. Therefore, the material of the buffer block 110 needs to be specifically designed to ensure that the buffer block 110 has certain deformation characteristics and certain damping characteristics and will not lose the function of the transition surface 110b due to excessive deformation. In this regard, in some embodiments of the present invention, the first end of the buffer block 110 is fixed to the cover body 200 through the elastic member 120. Then, the buffer block 110 can overcome the problem that the installation space of the buffer block 110 on the cover body 200 gradually decreases during the process of opening the cover body 200 by compressing the elastic member 120. In this way, it is not necessary for the buffer block 110 to have certain deformation characteristics, and only certain damping characteristics need to be ensured, which can expand the material selection range of the buffer block 110.

[0068] As Figure 2 and Figure 4 shown, in some embodiments of the present invention, the opening cover buffer structure 100 further includes: a first guiding member 130 fixed to the cover body 200, the first guiding member 130 having a guiding channel 130a, and the guiding channel 130a extending along the compression direction of the elastic member 120; the first end of the buffer block 110 extends outside the guiding channel 130a and is connected to the elastic member 120, so that the buffer block 110 slides along the guiding channel 130a. It can be understood that the minimum dimension of the first end of the buffer member 110 is greater than the width or diameter of the guiding channel 130a. In this way, the sliding direction of the buffer block 110 is consistent with the compression direction of the elastic member 120, and the reaction force of the elastic member 120 can be fully applied to the reinforcement plate 330 on the support surface ring 310 of the housing 300 through the buffer block 110, thereby effectively achieving the effect of damping the rice cooker.

[0069] It should be noted that when the elastic member 120 is in a natural state, as Figure 4 shown, there is a clearance distance D between the second end of the buffer block 110 and the first guiding member 130 to ensure that during the process of the cover body 200 being bounced open, the buffer block 110 can compress the elastic member 120 along the extending direction of the guiding channel 130a. Among them, the minimum value D of this clearance distance minThe deformation amount L1 + L2 generated when the elastic member 120 is compressed to the limit state, where L1 refers to the deformation amount generated by the elastic member 120 when the rice cooker is in a force balance state, and L2 refers to the additional deformation amount generated by the elastic member 120 when the cover body 200 continues to rotate due to its own inertia.

[0070] Optionally, as Figure 1 shown, the compression direction of the elastic member 120 is parallel to the central axis of the cover body 200, then the extending direction of the guiding channel 130a is also parallel to the central axis of the cover body 200. In addition, the first guiding member 130 is arranged in a plate-like structure, and its extending direction is perpendicular to the central axis of the cover body 200, and can be arranged on the cover body 200 by an integral molding method.

[0071] In some embodiments of the present invention, Figures 4 to 6 shown, in some embodiments of the present invention, the buffer block 110 includes: a buffer body 111, a sliding portion 112, and a connecting portion 113 that are sequentially connected; the buffer body 111 is distributed close to the housing 300; the sliding portion 112 is slidably arranged in the guiding channel 130a; the connecting portion 113 is coaxially distributed with the sliding portion 112, and the connecting portion 113 is connected to the elastic member 120. It can be understood that the free end face of the buffer body 111 is the end face of the second end of the buffer block 110, including a counteracting surface 110a, a transition surface 110b, and a stopping surface 110c, and the connecting portion 113 is the first end of the buffer block 110.

[0072] Optionally, the buffer body 111 can be processed into a cuboid block structure, that is, the connecting end of the buffer body 111 is a cuboid structure, and the free end is an irregular polygon structure.

[0073] Optionally, the material of the buffer body 111 is a damping material or a damping layer is covered on the free end face of the buffer body 111. In this way, the friction force exerted by the buffer body 111 on the reinforcement plate 330 of the support surface ring 310 of the housing 300 can be increased, and the damping effect on the rice cooker can be effectively achieved.

[0074] Optionally, the damping material or the material of the damping layer can both be silicone rubber. Among them, the damping layer can be arranged on the buffer body 111 by an adhesive method or an integral molding method.

[0075] As Figures 4 to 6As shown, in some embodiments of the present invention, a balance hole 111a is provided on the upper part of the buffer body 111. The balance hole 111a is used to keep the buffer block 110 in an upright state during the sliding process. It should be noted that the buffer body 111 includes a free end and a connecting end that are oppositely distributed, and the free end has a counteracting surface 110a, a transition surface 110b, and a stopping surface 110c. Since the free end of the buffer body 111 has a counteracting surface 110a, a transition surface 110b, and a stopping surface 110c, and considering the material cost issue, the volume of the buffer body 111 is larger than the volumes of the sliding part 112 and the connecting part 113, that is, the mass of the buffer body 111 is greater than the masses of the sliding part 112 and the connecting part 113. This makes it easy for the buffer block 110 to tilt during the sliding process, which is not conducive to applying frictional force and the reaction force transmitted by the elastic member 120 to the reinforcing plate 330 on the support surface ring 310 of the housing 300. In this regard, a balance hole 111a can be opened on the buffer body 111 to reduce the mass difference between the buffer body 111 and the sliding part 112 and the connecting part 113, so as to ensure that the buffer block 110 is always in an upright state during the sliding process.

[0076] Optionally, the balance hole 111a can be a circular through-hole and is opened below the connecting end of the buffer body 111 and below the connecting part 113.

[0077] As Figure 2 and Figure 4 shown, in some embodiments of the present invention, a second guide member 140 is provided on the side wall of the first guide member 130 facing away from the elastic member 120. The second guide member 140 and the cover body 200 cooperate to form a guide cavity 140a, and the guide cavity 140a extends along the compression direction away from the elastic member 120; the buffer body 111 is slidably disposed in the guide cavity 140a. In this way, it can be further ensured that the sliding direction of the buffer body 111 is on the same straight line as the compression direction of the elastic member 120, that is, consistent with the reaction force direction of the elastic member 120, and the reaction force of the elastic member 120 can be effectively transmitted to the reinforcing plate 330 of the housing 300 to the greatest extent.

[0078] As Figure 1 、 Figure 2 and Figure 4 shown, a reinforcing plate 230 is connected between the ear plate 210 on the cover body 200 and the cover body 200. The second guide member 140 includes a vertical guide plate and a horizontal guide plate that are perpendicularly connected. The vertical guide plate is respectively connected to the cover body 200 and the first guide member 130, and the horizontal guide plate is respectively connected to the reinforcing plate 230 and the ear plate 210 on the cover body 200. Among them, the vertical guide plate and the horizontal guide plate can be integrally formed, and the second guide member 140 and the cover body 200 and the reinforcing plate 230 on the cover body 200 are integrally formed in pairs.

[0079] Optionally, the sliding part 112 is arranged as a rod-shaped structure and integrally formed with the buffer body 111 and the connecting part 113. Correspondingly, the guiding channel 130a on the first guiding part 130 is of a circular through-hole structure.

[0080] As Figures 4 to 6 shown, in some embodiments of the present invention, the elastic member 120 is a spring; one end of the connecting part 113 facing away from the sliding part 112 is arranged as a frustum of a cone structure, and the diameter of the frustum of a cone structure gradually decreases along the direction from the buffer body 111 to the sliding part 112; one end of the elastic member 120 is sleeved on the frustum of a cone structure in an interference fit manner. In this way, by arranging one end of the connecting part 113 facing away from the guiding part as a frustum of a cone structure, it is convenient for the assembly between the elastic member 120 and the connecting part 113.

[0081] As Figure 5 and Figure 6 shown, in some embodiments of the present invention, there is a clamping groove 113a on the frustum of a cone structure, and one end of the elastic member 120 is embedded in the clamping groove 113a. The elastic member 120 in the form of a spring can not only deform axially but also radially. This enables the radially deformed end of the elastic member 120 to reach the position of the clamping groove 113a on the frustum of a cone structure and firmly embed in the clamping groove 113a due to reset, which can effectively prevent the elastic member 120 from falling off the connecting part 113 of the buffer block 110 when telescoping axially.

[0082] As Figure 2 and Figure 4 shown, in some embodiments of the present invention, the elastic member 120 is a spring; the open - cover buffer structure 100 further includes: a fixing member 150 arranged on the cover body 200, and the fixing member 150 extends towards the connecting part 113; one end of the elastic member 120 facing away from the connecting part 113 is sleeved on the fixing member 150. In this way, the detachable connection between the other end of the elastic member 120 and the cover body 200 is realized, and the replacement of the elastic member 120 can be achieved.

[0083] Optionally, the fixing member 150 can be arranged as a rod-shaped structure and installed on the cover body 200 in an integrally formed manner.

[0084] As Figures 1 to 5As shown in the figure, an embodiment of the present invention further provides an opening cover buffer structure. The opening cover buffer structure 100 includes: a buffer block 110 and an elastic member 120; the buffer block 110 includes a first end and a second end that are oppositely distributed, the elastic member 120 is fixed between the first end of the buffer block 110 and the cover body 200, the second end of the buffer block 110 includes at least one first side surface that is distributed in sequence from top to bottom and a second side surface located above at least the first side surface, and there is an included angle between adjacent two side surfaces; when the cover body is closed, the elastic member 110 is in a natural state; during the opening process of the cover body 20, at least one first side surface is in frictional contact with the housing 300 hinged to the cover body 200 in sequence, and at the same time the elastic member 120 is in a compressed state; when the cover body 200 is opened to a preset opening degree, the second side surface abuts against the housing 300, so that the cover body 200 stops rotating, and at the same time the elastic member 110 is compressed to the limit state.

[0085] For the opening cover buffer structure 100 as described above, during the process of the cover body 200 being bounced open, at least one first side surface of the buffer block 110 can be in frictional contact with the housing 300 in sequence, so as to apply a frictional force to the housing 300 in a direction opposite to the torsional spring torque direction of the rice cooker. Coupled with the fact that the elastic member 120 applies a reaction force to the buffer block 110 due to compression, this can effectively offset the torsional spring torque on the rice cooker, and further effectively eliminate the impact force received by the housing 300 during the opening process of the cover, avoid the rice cooker from vibrating during the opening process, and can achieve the shock absorption effect on the rice cooker.

[0086] It can be understood that when the number of the first side surfaces is 1, this first side surface can correspondingly serve as the offset surface 110a as described above; when the number of the first side surfaces is 2, these two first side surfaces can correspondingly serve as the offset surface 110a and the transition surface 110b as described above.

[0087] As Figure 1 As shown in the figure, another embodiment of the present invention further provides a rice cooker. The rice cooker includes: a cover body 200, a housing 300 and the opening cover buffer structure 100 as described above; the cover body 200 and the housing 300 respectively include a first end and a second end that are oppositely distributed. The first end of the cover body 200 is hinged to the first end of the housing 300 through a rotating shaft, and the second end of the cover body 200 is connected to the second end of the housing 300 through an opening cover mechanism. A torsional spring is sleeved on the rotating shaft, and two spring feet of the torsional spring are respectively abutted against the cover body 200 and the housing 300; the buffer block 110 of the opening cover buffer structure 100 is arranged on the cover body 200.

[0088] As described above, during the process of the cover body 200 being bounced open, the buffer block 110 can be in frictional contact with the housing 300 to apply a frictional force to the housing 300 in a direction opposite to the torsional spring torque direction of the rice cooker, which can offset the torsional spring torque on the rice cooker, and further eliminate the impact force received by the housing 300 during the opening process of the cover, and avoid the rice cooker from vibrating during the opening process of the cover.

[0089] Specifically, in some embodiments of the present invention, as Figure 1 shown, the number of the opening cover buffer structures 100 is two, and the two opening cover buffer structures 100 are symmetrically distributed on both sides of the central axis of the cover body 200. In this way, it can further effectively achieve buffering and shock absorption, and can also further ensure the smoothness of the opening process of the cover.

[0090] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0091] The above-described embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. An open - cover buffering structure is provided on a rice cooker, characterized in that, The opening cover buffering structure (100) includes: a buffer block (110), and the buffer block (110) includes a first end and a second end which are distributed oppositely; The first end of the buffer block (110) is arranged on the cover body (200); When the cover body (200) covers the housing (300) which is hinged to it, the second end of the buffer block (110) includes: a cancellation surface (110a), a transition surface (110b), and a stop surface (110c) which are connected in sequence from bottom to top. There is a first preset angle (α1) between the cancellation surface (110a) and the transition surface (110b), and there is a second preset angle (α2) between the transition surface (110b) and the stop surface (110c); During the opening process of the cover body (200), the cancellation surface (110a) and the transition surface (110b) are in frictional contact with the housing (300) hinged to the cover body (200) in sequence; When the cover body (200) is opened to a preset opening degree, the stop surface (110c) abuts against the housing (300) to make the cover body (200) stop rotating; The opening cover buffering structure (100) further includes: an elastic member (120), and the first end of the buffer block (110) is fixed on the cover body (200) through the elastic member (120); When the cover body (200) is closed, the elastic member (120) is in a natural state; During the opening process of the cover body (200), the elastic member (120) is in a compressed state; When the cover body (200) is opened to the preset opening degree, the elastic member (120) is compressed to the limit state.

2. The open-cover buffer structure according to claim 1, wherein The cancellation surface (110a) and the transition surface (110b) are respectively arranged as arc surface structures adapted to the outer contour of the housing (300); The stop surface (110c) is arranged as a plane structure.

3. The open-cover buffer structure according to claim 2, characterized in that, The preset opening degree of the cover body (200) is 60° - 80°; The transition surface (110b) includes: a first end connected to the connection end of the cancellation surface (110a) and a second end connected to the connection end of the stop surface (110c); The first preset angle (α1) formed between the tangent plane of the first end of the transition surface (110b) and the tangent plane of the connection end of the cancellation surface (110a) is 30° - 40°; The second preset angle (α2) formed between the tangent plane of the second end of the transition surface (110b) and the stop surface (110c) is 20° - 30°.

4. The opening buffer structure according to claim 1, wherein The opening cover buffering structure (100) further includes: a first guiding member (130) fixed on the cover body (200), and the first guiding member (130) has a guiding channel (130a), and the guiding channel (130a) extends along the compression direction of the elastic member (120); The first end of the buffer block (110) extends out of the guiding channel (130a) to be connected with the elastic member (120) so that the buffer block (110) slides along the guiding channel (130a).

5. The opening buffer structure according to claim 4, wherein, The buffer block (110) includes: a buffer body (111), a sliding part (112), and a connecting part (113) connected in sequence; The buffer body (111) is distributed close to the housing (300); The sliding part (112) is slidably arranged in the guiding channel (130a); The connecting part (113) is coaxially distributed with the sliding part (112), and the connecting part (113) is connected to the elastic member (120).

6. The opening buffer structure according to claim 5, characterized in that The material of the buffer body (111) is a damping material, or a damping layer is covered on the free end surface of the buffer body (111).

7. The open-cover buffer structure according to claim 5, characterized in that, The buffer body (111) has a balance hole (111a), and the balance hole (111a) is used to keep the buffer block (110) in an upright state during the sliding process.

8. The open cover buffer structure according to claim 5, wherein A second guiding member (140) is arranged on the side wall of the first guiding member (130) facing away from the elastic member (120). A guiding cavity (140a) is formed by the cooperation between the second guiding member (140) and the cover body (200), and the guiding cavity (140a) extends along the compression direction away from the elastic member (120); The buffer body (111) is slidably arranged in the guiding cavity (140a).

9. The opening buffer structure according to claim 5, wherein The elastic member (120) is a spring; One end of the connecting part (113) facing away from the sliding part (112) is arranged in a frustum cone structure, and the diameter of the frustum cone structure gradually decreases along the direction from the buffer body (111) to the sliding part (112); One end of the elastic member (120) is sleeved on the frustum cone structure by interference fit.

10. The opening buffer structure according to claim 9, wherein, A clamping groove (113a) is formed on the frustum cone structure, and one end of the elastic member (120) is embedded into the clamping groove (113a).

11. The open - cover buffer structure according to claim 5, characterized in that, The elastic member (120) is a spring; The cover opening buffer structure (100) further includes: a fixing member (150) arranged on the cover body (200), and the fixing member (150) extends towards the connecting part (113); One end of the elastic member (120) facing away from the connecting part (113) is sleeved on the fixing member (150).

12. An opening cover buffering structure is provided on a rice cooker, characterized in that, The cover opening buffer structure (100) includes: a buffer block (110) and an elastic member (120); The buffer block (110) includes a first end and a second end distributed oppositely. The elastic member (120) is fixed between the first end of the buffer block (110) and the cover body (200). When the cover body (200) is closed relative to the housing (300) hinged thereto, the second end of the buffer block (110) includes at least one first side surface distributed in sequence from bottom to top and a second side surface located above the at least one first side surface, and an included angle is formed between adjacent two side surfaces; When the cover body (200) is closed, the elastic member (120) is in a natural state; During the opening process of the cover body (200), the at least one first side surface is in frictional contact with the housing (300) hinged to the cover body (200) in sequence, and at the same time the elastic member (120) is in a compressed state; When the cover body (200) is opened to a preset opening degree, the second side abuts against the housing (300) to stop the rotation of the cover body (200), and at the same time, the elastic member (110) is compressed to the limit state.

13. An electric rice cooker, characterized in that, The rice cooker includes: a cover body (200), a housing (300), and the opening cover buffer structure (100) according to any one of claims 1 to 12; The cover body (200) and the housing (300) respectively include a first end and a second end that are oppositely distributed. The first end of the cover body (200) is hinged to the first end of the housing (300) through a rotating shaft, and the second end of the cover body (200) is connected to the second end of the housing (300) through an opening cover mechanism. A torsion spring is sleeved on the rotating shaft, and two spring feet of the torsion spring respectively abut against the cover body (200) and the housing (300); The buffer block (110) of the opening cover buffer structure (100) is arranged on the cover body (200).

14. The rice cooker according to claim 13, wherein, The number of the opening cover buffer structures (100) is two, and the two opening cover buffer structures (100) are symmetrically distributed on both sides of the central axis of the cover body (200).

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