Patent Description:
Cabinet doors of some storage equipment (like refrigerators) in the related art are sealed with door seals, such as soft door seals with magnetic strips. A certain pulling force needs to be applied to open the cabinet doors due to the pressure difference between the interior and exterior of the storage equipment and the adsorption force of the door seals on the cabinet body if the cabinet doors are closed. In order to open the door automatically, an electromagnetic push rod structure is introduced into the storage equipment to open the door. However, since the pushing force of the electromagnetic push rod type door opening device is basically positive related to its volume, a larger electromagnetic push rod structure needs to be designed to open the door stably, which will affect the height of the entire storage equipment and is difficult to popularize. <CIT> discloses an example of a door opening device.

In the following, each of the described methods, apparatuses, embodiments, examples, and aspects, which do not fully correspond to the invention as defined in the claims is thus not according to the invention and is, as well as the whole following description, present for illustration purposes only or to highlight specific aspects or features of the claims. Embodiments not falling under the scope of the claims should be interpreted as examples useful for understanding the invention. The present application is intended to solve at least one of the problems existing in the related art. The present application provides a door opening device, which can provide a larger driving force even when the thickness of the door opening device is small.

The present application further provides a storage equipment.

According to the present application, an embodiment provides a door opening device, including:.

In the door opening device according to the embodiment of the present application, the thickness of the door opening device to a large extent can be reduced under the condition of ensuring the pushing force through synchronous action of the plurality of electromagnetic push rod structures arranged in parallel, which is helpful to improve the application range of the door opening device.

According to the invention, the door opening device further includes:
an output j oint, where each of the push rods is connected to the output joint.

According to the door opening device according to the embodiments of the present application, the output of the door opening device is more uniform. In the long-term use process, even if a wear or looseness occurs among the plurality of electromagnetic push rod structures, the opening of a single cabinet door by the door opening device will not be affected, and especially the cabinet door or cabinet body will not be impacted by plurality of push rods, which helps to enhance the durability of the door opening device.

According to an embodiment of the present application, at least one of a plurality of push rods is connected to the output joint in a position-adjustable manner along a moving direction of the push rod.

According to the door opening device according to the embodiments of the present application, the total stroke can remain unchanged, and the abundant driving force in the middle and rear section of the stroke can be allocated to the front section of the stroke, and then the driving force at the initial position becomes larger. Due to the increase of driving force in the early stage, the thickness of the electromagnetic push rod structure can be made smaller, which makes the door opening device more practical.

According to an embodiment of the present application, at least one of the push rods includes a threaded rod which passes through the output joint, and the threaded rod is connected to the output joint in a position-adjustable manner through nuts on both sides of the output joint.

According to an embodiment of the present application, at least one of the push rods comprises an adjusting rod which passes through the output joint, the adjusting rod includes a positioning surface extending along the moving direction of each push rod, the output joint is provided with a positioning hole communicating with the positioning surface, the adjusting rod is connected to the output joint in an adjustable manner through a positioning member, and the positioning member passes through the positioning hole and abuts against the positioning surface.

According to the invention, the output joint includes:.

According to an embodiment of the present application, the output joint further includes:
a buffer head, provided at a working end of the output rod.

According to an embodiment of the present application, the connecting rod is provided with a connecting hole, a tail end of each push rod is provided with a stepped connecting shaft, and the connecting shaft passes through the connecting hole and is connected to the connecting rod.

According to an embodiment of the present application, the door opening device further includes:
a base, provided with a mounting position for mounting the door opening device, and the plurality of electromagnetic push rod structures are mounted on the base.

According to an embodiment of the present application, the door opening device further includes: a connecting rib, connected to the plurality of electromagnetic push rod structures and the base.

According to the present application, an embodiment provides a storage equipment, including:.

According to the storage equipment according to the embodiments of the present application, a door opening device with a smaller thickness can be used and a larger push force can be obtained through the synchronous action of plurality of electromagnetic push rod structures arranged in parallel. The height of the entire storage equipment is decreased, which is convenient for transportation and mount.

According to an embodiment of the present application, the door opening device is mounted on the cabinet body, and the plurality of push rods are configured to push the same cabinet door; or the door opening device is mounted on the same cabinet door, and the plurality of push rods are configured to push the cabinet body.

The above one or more solutions in the embodiments of the present application have at least one of the following technical effects.

The thickness of the door opening device can be reduced to a large extent under the condition of ensuring the pushing force through synchronous action of plurality of electromagnetic push rod structures arranged in parallel, which is helpful to improve the application range of the door opening device.

Further, by providing the push rod with an adjustable stroke, the total stroke of the door opening device can remain unchanged, and the abundant driving force in the middle and rear section of the stroke can be allocated to the front section of the stroke, and then the driving force at the initial position becomes larger. Due to the increase of driving force in the early stage, the thickness of the electromagnetic push rod structure can be made smaller, which makes the door opening device more practical.

The additional aspects and advantages of the present application will be set forth in part in the description which follows, and some thereof will be apparent from the following description, or be learned by the practice of the present application.

In order to more clearly illustrate the solutions according to the present application or the related art, the accompanying drawings used in the description of the embodiments of the present application or the related art will be briefly introduced below. It should be noted that the drawings in the following description are only part embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

Reference numerals:
<NUM>-electromagnetic push rod structure; <NUM>-solenoid; <NUM>-elastic reset member; <NUM>-push rod; <NUM>-connecting shaft; <NUM>-threaded rod; <NUM>-positioning surface; <NUM>-stopper; <NUM>-nut; <NUM>-positioning member; <NUM>-output joint; <NUM>-connecting rod; <NUM>-output rod; <NUM>-buffer head; <NUM>-base; <NUM>-mounting position; <NUM>-connecting rib.

The implementations of the present application are further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are intended to illustrate the present application, but are not intended to limit the scope of the present application.

In the description of the embodiments of the present application, it should be noted that, the orientation or positional relations indicated by terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relations shown in the drawings, which are merely convenience of description of the embodiments of the present application and to simplify description, but does not indicate or imply that the stated device or element must have the particular orientation, or be constructed and operated in a particular orientation, and thus it is not to be construed as limiting the embodiments of the present application. Furthermore, the terms "first", "second" and "third" are used for descriptive purposes only and should not be construed as indicating or implying a relative importance.

In the description of the embodiments of the present application, it should be noted that unless explicitly stated and defined otherwise, the terms "connected to" and "connected" shall be understood broadly, for example, it may be either fixedly connected or detachably connected, or can be integrated; it may be either mechanically connected, or electrically connected; it may be either directly connected or indirectly connected through an intermediate medium. The specific meanings of the terms above in the embodiments of the present application can be understood by a person skilled in the art in accordance with specific conditions.

In the embodiments of the present application, unless explicitly stated and defined otherwise, a first feature being "up" or "down" a second feature may mean that the first feature is directly contacted with the second feature, or the first feature and the second feature are indirectly contacted through an intermediate medium. Also, a first feature being "above", "over" and "on" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that a level of the first feature is higher than that of the second feature. A first feature being "below", "under" and "down" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that a level of the first feature is lower than that of the second feature.

In the description of this specification, the reference terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples", and the like mean that specific feature, structure, material or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this description, schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific feature, structure, material or characteristic can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine various embodiments or examples and features in various embodiments or examples described in this description unless they are contradictory.

The door opening device according to the embodiments of the present application will be described below in conjunction with <FIG>.

When a push rod <NUM> of an electromagnetic push rod structure <NUM> of the door opening device acts, the cabinet door can be opened automatically. For example, the door opening device can be used in storage equipment, and when the push rod <NUM> of the electromagnetic push rod structure <NUM> acts, it can provide a driving force for driving the cabinet door to be opened between the cabinet door and the cabinet body.

As shown in the <FIG>, the door opening device according to the embodiments of the present application includes the electromagnetic push rod structure <NUM> and a controller (not shown in the figures).

The electromagnetic push rod structure <NUM> includes the push rod <NUM>, a solenoid <NUM> and an elastic reset member <NUM>.

The push rod <NUM> is made of magnetic material. The solenoid <NUM> includes a winding coil and the solenoid <NUM> is sleeved outside the push rod <NUM>. The elastic reset member <NUM> is elastically connected between the solenoid <NUM> and the push rod <NUM>.

In some embodiments, as shown in <FIG>, the push rod <NUM> passes through the solenoid <NUM>, where a working end of the push rod <NUM> passes through the solenoid <NUM> from a first end (left end shown in the figures) of the solenoid <NUM>, the working end of the push rod <NUM> is used to push the cabinet door or the cabinet body, and the other end of the push rod <NUM> passes through the solenoid <NUM> from a second end (right end shown in the figures) of the solenoid <NUM>.

The elastic reset member <NUM> can be a coil spring. The elastic reset member <NUM> can be sleeved on a section of the push rod <NUM> extending out of the second end of the solenoid <NUM>, the other end of the push rod <NUM> can be provided with a stopper <NUM>, and the elastic reset member <NUM> can elastically stop and abut against between the second end of the solenoid <NUM> and the stopper <NUM>.

The stopper <NUM> can be integrally formed at the other end of the push rod <NUM>, and the stopper <NUM> can be a center boss surrounding the peripheral wall of the push rod <NUM>.

Alternatively, the stopper <NUM> can be integrally formed at the other end of the push rod <NUM>. The stopper <NUM> can be a plurality of bosses provided on the peripheral wall of the push rod <NUM>, and the plurality of bosses can be provided circumferentially around the peripheral wall of the push rod <NUM>.

Alternatively, the stopper <NUM> can be a circlip or other spare part clamped at the other end of the push rod <NUM>.

When the solenoid is energized, a magnetic field can be generated in the solenoid, and then the push rod <NUM> can move in a straight line under the action of the magnetic field. As shown in <FIG>, the push rod <NUM> resists the elastic force of the elastic reset member <NUM> and moves to the left. The push rod <NUM> drives the elastic reset member <NUM> to compress, and then a driving force for driving the opening of the cabinet door is provided between the cabinet door and the cabinet body through the linear motion of the push rod <NUM>.

When the solenoid is powered off, the magnetic field in the solenoid disappears. As shown in <FIG>, the push rod <NUM> resets under the drive of the elastic force of the elastic reset member <NUM>, and the push rod <NUM> moves to the right.

The number of the electromagnetic push rod structures <NUM> is multiple, and the plurality of electromagnetic push rod structures <NUM> are arranged side by side and connected in parallel. Each of the electromagnetic push rod structures <NUM> includes a push rod <NUM>, and the plurality of electromagnetic push rod structures <NUM> are used to drive the same cabinet door to be opened.

For example, each electromagnetic push rod structure <NUM> is mounted on the same cabinet door, or each electromagnetic push rod structure <NUM> is mounted on the same cabinet body, and the working end of the push rod <NUM> of each electromagnetic push rod structure <NUM> is used to push the same cabinet door.

<FIG> are illustrated by taking two electromagnetic push rod structures <NUM> as an example. It should be noted that the number of electromagnetic push rod structures <NUM> can also be three, four, five or more.

The controller is electrically connected to the plurality of electromagnetic push rod structures <NUM>, and is configured to drive the push rods <NUM> of the plurality of electromagnetic push rod structures <NUM> to act synchronously.

The controller can be a controller integrated in the electromagnetic push rod structure <NUM> or an independent controller relative to the electromagnetic push rod structure <NUM>.

The controller can be in the form of a circuit board.

The controller can be provided with a control switch, one end of the control switch is used for connecting a power supply, and the other end of the control switch is connected to the plurality of electromagnetic push rod structures <NUM>.

When the controller receives a control command, it can supply power to the plurality of electromagnetic push rod structures <NUM> synchronously, to make the push rods <NUM> of the plurality of electromagnetic push rod structures <NUM> act to drive the cabinet door to be opened.

It should be noted that when the cabinet door is closed, due to the inertial force caused by the weight of the cabinet door itself, the pressure difference between the inside and outside of the cabinet door and/or the adsorption force between the cabinet door and the cabinet body, the cabinet door can only be opened when the driving force received is greater than the target threshold.

In the related art, there are some applications of electromagnetic push rod structure <NUM> in the use of the door opening device. However, in order to ensure that the pushing force of the electromagnetic push rod structure <NUM> exceeds a target threshold, the electromagnetic push rod structure <NUM> needs to be made larger, which mainly caused by that greater number of coils wound in the solenoid <NUM>, which results in the larger diameter of the solenoid <NUM>.

In the above art, the height of the entire storage equipment will be increased, which will affect the transportation and mount of the storage equipment. Especially for some storage equipment with large volume, it is difficult for the electromagnetic push rod structure <NUM> to be used in the door opening device of the storage equipment with large volume due to larger target threshold values for opening their cabinet doors.

In the door opening device according to the embodiments of the present application, since the plurality of electromagnetic push rod structures <NUM> are arranged in parallel, each electromagnetic push rod structure <NUM> can be set to be a small volume, and then a resultant force of the plurality of electromagnetic push rod structures <NUM> can also reach the target threshold. In this way, the door opening device according to the embodiments of the present application can be applied to the storage equipment with large target threshold value of door opening force, thus helping to simplify the user's operation difficulty.

In the door opening device according to the embodiments of the present application, the thickness of the door opening device to a large extent can be reduced under the condition of ensuring the pushing force through synchronous action of plurality of electromagnetic push rod structures <NUM> arranged in parallel, which is helpful to improve the application range of the door opening device.

According to the invention, as shown in <FIG>, the door opening device can further include an output joint <NUM>, and each push rod <NUM> is connected to the output joint <NUM>.

In other words, plurality of electromagnetic push rod structures <NUM> output driving force through the same output joint <NUM>, to make the output of the door opening device is more uniform. In the long-term use process, even if a wear or looseness occurs between the plurality of electromagnetic push rod structures <NUM>, the opening of a single cabinet door by the door opening device will not be affected, and especially the cabinet door or cabinet body will not be impacted by plurality of push rods <NUM>, which is helpful to enhance the durability of the door opening device.

In the embodiments shown in <FIG>, the push rods <NUM> of the two electromagnetic push rod structures <NUM> are connected to the output joint <NUM> and a driving force is output through the output joint <NUM>. In the embodiment where the door opening device includes more electromagnetic push rod structures <NUM>, the push rod <NUM> of each of the electromagnetic push rod structures <NUM> is connected to the output joint <NUM> and a driving force is output through the output joint <NUM>.

As shown in <FIG>, the output joint <NUM> includes a connecting rod <NUM> and an output rod <NUM>.

The connecting rod <NUM> is connected to a plurality of push rods <NUM>. As shown in <FIG>, the connecting rod <NUM> extends along the arrangement direction of the plurality of electromagnetic push rod structures <NUM>, so that each push rod <NUM> can be connected to the connecting rod <NUM>.

For example, in some embodiments, the connecting rod <NUM> is provided with a connecting hole, which is a through hole passing through the connecting rod <NUM>, a tail end of the push rod <NUM> is provided with a stepped connecting shaft <NUM>, and the diameter of the connecting shaft <NUM> is smaller than the diameter of the main body part of the push rod <NUM>, so that a step surface for limiting is formed at the joint of the connecting shaft <NUM> and the main body part of the push rod <NUM>. The connecting shaft <NUM> penetrates through the connecting hole, and the connecting shaft <NUM> is connected to the connecting rod <NUM>.

For example, in the embodiments shown in <FIG>, a portion of the connecting shaft <NUM> is provided with an external thread section. The connecting shaft <NUM> penetrates through the connecting hole of the connecting rod <NUM> until the step surface abuts against the connecting rod <NUM>. The smooth section of the connecting shaft <NUM> is aligned with the connecting hole, the external thread section of the connecting shaft <NUM> extends out of the connecting hole, and then the push rod <NUM> can be connected to the connecting rod <NUM> by threaded fit between a nut <NUM> and the external thread section.

For example, in the embodiments shown in <FIG>, the connecting shaft <NUM> includes a threaded rod <NUM> which is screwed into a first nut <NUM>. The threaded rod <NUM> penetrates through the connecting hole of the connecting rod <NUM> until the first nut <NUM> abuts against the connecting rod <NUM>. The threaded rod <NUM> extends out of the connecting hole, and then the push rod <NUM> can be connected to the connecting rod <NUM> through threaded fit between a second nut <NUM> and the threaded rod <NUM>.

For example, in the embodiment shown in <FIG>, the connecting shaft <NUM> includes an adjusting rod. A circumferential wall on one side of the adjusting rod is disposed as a plane to form a positioning surface <NUM>. For example, the cross section of the adjusting rod can be D-shaped. The adjusting rod penetrates through the connecting hole of the connecting rod <NUM>. The connecting rod <NUM> is provided with a positioning hole communicating with the connecting hole. A positioning member <NUM> extends from the positioning hole and abuts against the positioning surface <NUM> of the adjusting rod, and thus the push rod <NUM> can be connected to the connecting rod <NUM>.

The positioning hole can be a threaded hole, and the positioning member <NUM> can be a screw, such as a flat head screw. Alternatively, the positioning hole can be a wedged hole, and the positioning member <NUM> can be a wedged pin.

The positioning surface <NUM> can be provided with anti-skid patterns, including a plurality of straight patterns or grid patterns arranged in parallel.

For example, in the embodiment shown in <FIG>, an end surface of the connecting shaft <NUM> is provided with a threaded hole. The connecting shaft <NUM> penetrates through the connecting hole of the connecting rod <NUM>, and a threaded connecting member is in threaded connection with the threaded hole, thus the push rod <NUM> can be connected to the connecting rod <NUM>.

As shown in <FIG>, the output rod <NUM> is connected to the connecting rod <NUM>, and at least portion of the output rod <NUM> protrudes towards the direction away from the push rod <NUM> relative to the connecting rod <NUM>. In this way, the output rod <NUM> can push the cabinet door or cabinet body to move. For example, the working end of the output rod <NUM> can push the cabinet door or cabinet body to move.

In this way, the driving force outputted from the push rod <NUM> of each of the electromagnetic push rod structures <NUM> can be outputted through the output rod <NUM>, especially when there is only one working end of the output rod <NUM>, in the door opening device, the driving forces of the plurality of electromagnetic push rod structures <NUM> can be outputted at one position.

In an embodiment, the number of the working ends of the output rod <NUM> can also multiple, for example, the output rod <NUM> is a Y-shaped structure.

An end of the output rod <NUM> away from the working end can be provided with a threaded section whose outer diameter is smaller than the outer diameter of the main body part of the output rod <NUM>. In this way, the threaded section of the output rod <NUM> penetrates through the connecting rod <NUM> and extends from the other side of the connecting rod <NUM>, and then the output rod <NUM> can be connected to the connecting rod <NUM> through the nut <NUM>.

The output rod <NUM> can be connected to the middle of the connecting rod <NUM>.

For example, as shown in <FIG>, in the embodiment where the number of electromagnetic push rod structures <NUM> is two, two push rods <NUM> are connected to both ends of the connecting rod <NUM> respectively, and the output rod <NUM> is connected to the midpoint of the connecting rod <NUM>.

In an embodiment where the number of electromagnetic push rod structures <NUM> is an even number greater than two, the plurality of push rods <NUM> are distributed along the length direction of the connecting rod <NUM>, and the output rod <NUM> is connected to the midpoint of the connecting rod <NUM>.

In an embodiment where the number of electromagnetic push rod structures <NUM> is an odd number, the output rod <NUM> and one of the electromagnetic push rod structures <NUM> are located on both sides of the midpoint of the connecting rod <NUM> respectively.

In some embodiments, as shown in <FIG>, the output joint <NUM> can further include a buffer head <NUM> and the buffer head <NUM> can be provided at the working end of the output rod <NUM>.

The buffer head <NUM> can be made of materials with lower hardness, such as silica gel or rubber.

The buffer head <NUM> can be a block structure.

Alternatively, the buffer head <NUM> can be a cylindrical structure with one end open, such as a cylinder. The buffer head <NUM> can be sleeved on the working end of the output joint <NUM>, and thus the working end of the output joint <NUM> can be wrapped.

The buffer head <NUM> is used to reduce the impact of the door opening device on the cabinet body or cabinet door and reduce the damage to the cabinet body or cabinet door.

In some embodiments, at least one of the plurality of push rods <NUM> is connected to the output joint <NUM> in a position-adjustable manner along the moving direction of the push rod <NUM>.

In other words, the stroke of this push rod <NUM> can be reduced.

For example, for the electromagnetic push rod structures <NUM>, the magnetic force of the solenoid <NUM> to the push rod <NUM> and the stroke of the push rod <NUM> have a high-order curve relationship, that is, the driving force of the push rod <NUM> and the stroke of the push rod <NUM> have a high-order curve relationship.

At an initial position (corresponding to that the cabinet door is closed), the driving force of the push rod <NUM> is small. As the push rod <NUM> moves toward the direction of pushing the door, the driving force of the push rod <NUM> increases rapidly.

On the contrary, when opening the door of the storage equipment, the resistance is usually the largest at the initial stage and becomes smaller at the later stage.

In the related art, in order to ensure that the cabinet door can be pushed to open, the electromagnetic push rod structure <NUM> with sufficient driving force is designed to ensure that the cabinet door can be pushed to open at the initial position. However, in this case, the thickness of the entire electromagnetic push rod structure <NUM> is large.

In an embodiment of the present application, the initial positions of the push rods <NUM> of some electromagnetic push rod structures <NUM> are adjusted to the position of opening the door, so that the driving force of the electromagnetic push rod structure <NUM> at the initial position is large.

The initial position of at least one of the plurality of push rods <NUM> remains unchanged, or at least one of the plurality of push rods <NUM> is connected to the output joint <NUM> in a position-nonadjustable manner along the moving direction of the push rod <NUM>.

In this way, the total stroke of these initial position-nonadjustable electromagnetic push rod structures <NUM> remains unchanged.

For a door opening device including plurality of electromagnetic push rod structures <NUM> arranged in parallel, the total stroke of the door opening device is equal to the stroke of the electromagnetic push rod structure <NUM> with the largest stroke. That is, when the initial position of at least one of the plurality of push rods <NUM> remains unchanged, the stroke of the door opening device can be ensured.

Moreover, since the initial positions of some electromagnetic push rod structures <NUM> are adjusted to the position of opening the door, the driving force of the door opening device at the initial position is larger.

On the one hand, in the door opening device according to the embodiments of the present application, the abundant driving force in the middle and rear section of the stroke of the door opening device can be allocated to the front section of the stroke, which can not only increase the driving force in the early stage, but also reduce the waste of driving force in the later stage.

On the other hand, due to the increase of driving force in the early stage, the thickness of the electromagnetic push rod structure <NUM> can be made smaller, which makes the door opening device more practical.

As shown in <FIG> and <FIG>, taking the door opening device including two electromagnetic push rod structures <NUM> as an example, the initial position of the push rod <NUM> of one electromagnetic push rod structure <NUM> can be adjusted to the direction near the output joint <NUM>, while the initial position of the push rod <NUM> of another electromagnetic push rod structure <NUM> remains unchanged.

In this way, the total stroke of the door opening device can remain unchanged, and the driving force at the initial position is larger.

When the door opening device includes more electromagnetic push rod structures <NUM>, the initial position of the push rod <NUM> of one of the electromagnetic push rod structures <NUM> can remain unchanged, and the initial positions of the push rods <NUM> of the other electromagnetic push rod structures <NUM> can be adjusted to the direction of the output joint <NUM> to increase the initial driving force as much as possible.

In an embodiment, the adjusted size of the initial position of the push rod <NUM> needs to be set according to the actual situation as long as the basic requirement that the door can be pushed to move during the whole phase of opening the door is satisfied.

In some embodiments, as shown in <FIG>, at least one of the plurality of push rods <NUM> includes a threaded rod <NUM>. As shown in <FIG>, one of the two push rods <NUM> includes the threaded rod <NUM> and the other of the two push rods <NUM> includes a common stepped connecting shaft <NUM>.

The threaded rod <NUM> penetrates through the output joint <NUM>, and the threaded rod <NUM> is connected to the output joint <NUM> in a position-adjustable manner through the nuts <NUM> on both sides of the output joint <NUM>.

The initial position of the push rod <NUM> can be adjusted by controlling a precession depth of the nuts <NUM> on both sides of the output joint <NUM>.

As shown in <FIG>, the initial position of one of the push rods <NUM> is adjusted to the direction of the output joint <NUM>. During the adjustment, it is needed to resist the elastic force of the elastic reset member <NUM>, and thus the elastic reset member <NUM> corresponding to the push rod <NUM> is shortened compared with the other elastic reset member <NUM>.

In some embodiments, as shown in <FIG>, at least one of the plurality of push rods <NUM> includes an adjusting rod which penetrates through the output joint <NUM>. The adjusting rod includes a positioning surface <NUM> extending along the moving direction of the push rod <NUM>. The positioning surface <NUM> is planar, for example, the cross section of the adjusting rod can be D-shaped.

The output joint <NUM> is provided with a positioning hole communicating with the positioning surface <NUM>. The adjusting rod is connected to the output joint <NUM> through the positioning member <NUM> in an adjustable manner. The adjusting rod penetrates through the positioning hole, and the adjusting rod abuts against the positioning surface <NUM>.

The positioning hole can be a threaded hole, and correspondingly, the positioning member <NUM> can be a screw, such as a flat head screw; or the positioning hole can be a wedged hole, and correspondingly, the positioning member <NUM> can be a wedged pin.

In some embodiments, as shown in <FIG>, the door opening device according to the embodiments of the present application can further include a base <NUM>, which is provided with a mounting position <NUM> for mounting the door opening device. The mounting position <NUM> is used for mounting the door opening device on the cabinet body or cabinet door, and plurality of electromagnetic push rod structures <NUM> are mounted on the base <NUM>.

The base <NUM> can be a flat plate, and the mounting position <NUM> can be a mounting hole provided on the flat plate, so that when the door opening device is mounted on the cabinet door or cabinet body, the threaded connecting member can penetrate through the mounting hole.

It should be noted that the mounting position <NUM> can further include other structures, including but not limited to positioning ribs, etc..

The housing of the electromagnetic push rod structure <NUM> can be welded to the base <NUM>, or fixed to the base <NUM> through clips or threaded connecting members.

As shown in <FIG>, <FIG>, <FIG> and <FIG>, the door opening device can further include a connecting rib <NUM>. The connecting rib <NUM> is connected to the base <NUM> and the plurality of electromagnetic push rod structures <NUM>.

The electromagnetic push rod structure <NUM> can be provided between the connecting rib <NUM> and the base <NUM>, so that the electromagnetic push rod structure <NUM> can be clamped by the fasteners on both sides.

The connecting rib <NUM> can be a metal plate structure, and the connecting rib <NUM> can be welded with the base <NUM> and the plurality of electromagnetic push rod structures <NUM>.

In some embodiments, as shown in <FIG>, the base <NUM> can be an integral plate structure. In this way, a plurality of electromagnetic push rod structures <NUM> are placed side by side on the base <NUM> and are fixedly connected to the base <NUM>. The entire door opening device can be mounted by only connecting the base <NUM> to the cabinet body or the cabinet door.

In other embodiments, as shown in <FIG>, the base <NUM> can be a multi-plate structure, for example, each electromagnetic push rod structure <NUM> is provided with a corresponding base <NUM>, which can reduce the weight of the entire door opening device.

The storage equipment according to the embodiments of the present application is described below, and the storage equipment described below and the door opening device described above can be referred to each other.

The storage equipment can be a refrigerator, a display cabinet, a vending machine, a wardrobe, etc..

The storage equipment according to the embodiments of the present application includes a cabinet body, a cabinet door and a door opening device.

The cabinet door is mounted on the cabinet body in an openable and closable manner.

The door opening device is a door opening device in any of the above embodiments.

The door opening device is mounted on one of the cabinet body and the cabinet door, and the push rod <NUM> is used for pushing the other of the cabinet body and the cabinet door.

For example, one side of the cabinet door can be pivotally connected to the cabinet body, including pivotally connected through hinge or the connecting shaft <NUM>. The door opening device is mounted on the side away from the pivot axis to increase the force arm.

Alternatively, the cabinet door is pull-out type or side hung type, and the door opening device can be mounted on the middle area.

In the storage equipment according to the embodiments of the present application, a door opening device with a smaller thickness can be used and a larger push force can be obtained through the synchronous action of the plurality of parallel electromagnetic push rod structures <NUM>. The height of the entire storage equipment is decreased, which is convenient for transportation and mounting.

In some embodiments, the door opening device is mounted on the cabinet body, and a plurality of push rods <NUM> are used for pushing the same cabinet door. In this way, the cabinet door can be pushed by the plurality of electromagnetic push rod structures <NUM>, the cabinet door is opened more stable, and the mount space on the cabinet body is more abundant.

In other embodiments, the door opening device can be mounted on the same cabinet door, and the plurality of push rods <NUM> are used for pushing the cabinet body. In this way, the cabinet body can be pushed by the plurality of electromagnetic push rod structures <NUM>, and the cabinet door can be opened more stably due to the reaction force.

The device embodiments described above is only illustrative, in which the unit described as a separate component may be or may not be physically separated, and the component displayed as a unit may be or may not be a physical unit. That is, it may be located in one position or may be distributed to plurality of network units. Some or all of the modules may be selected according to the actual needs to achieve the purpose of the solutions in these embodiments.

From the description of the above embodiments, each embodiment can be implemented by means of software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on this understanding, the above solutions or the part of the solutions that contributes to the related art can be embodied in the form of a software product, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic disk, optical disk or the like, including several instructions for causing a computer device (which can be a personal computer, a server, or a network storage equipment or the like) to perform the methods described in various embodiments or some parts of the embodiments.

Claim 1:
A door opening device, comprising:
a plurality of electromagnetic push rod structures (<NUM>), wherein each of the plurality of electromagnetic push rod structures (<NUM>) comprises a push rod (<NUM>); and
a controller, electrically connected to the plurality of electromagnetic push rod structures (<NUM>) and configured to drive push rods (<NUM>) of the plurality of electromagnetic push rod structures (<NUM>) to act synchronously;
characterised by further comprising:
an output joint (<NUM>), wherein each of the push rods (<NUM>) is connected to the output j oint; and
wherein the output joint (<NUM>) comprises:
a connecting rod (<NUM>), connected to the plurality of push rods (<NUM>); and
an output rod (<NUM>), connected to the connecting rod (<NUM>), and at least portion of the output rod (<NUM>) protrudes towards a direction away from the push rods (<NUM>) relative to the connecting rod (<NUM>).