CN113237108A

CN113237108A - Connecting structure and range hood applying same

Info

Publication number: CN113237108A
Application number: CN202110590160.6A
Authority: CN
Inventors: 安凯
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-08-10
Anticipated expiration: 2041-05-28
Also published as: CN113237108B

Abstract

The invention relates to a connecting structure and a range hood applying the same, wherein the connecting structure comprises a shell; a magnet; a first elastic member; the limiting rod is vertically arranged in the magnet in a penetrating mode and can move up and down relative to the magnet, the limiting rod can move to a first position and a second position, the lower end face of the limiting rod is located below the lower end face of the magnet in the state that the limiting rod is located at the first position, and the magnet and the second component are located in a desorption state; when the limiting rod is in the second position, the lower end face of the limiting rod is hidden in the magnet, and the magnet and the second component are in a magnetic attraction state; the pressing positioning structure is arranged in the shell, is connected with the limiting rod and can position the limiting rod at a first position or a second position so as to improve the hand feeling of the second component during disassembly and assembly.

Description

Connecting structure and range hood applying same

Technical Field

The invention belongs to the technical field of range hoods, and particularly relates to a connecting structure and a range hood applying the connecting structure.

Background

At present, the integral installation height of the European-style range hood determines that the range hood is far away from a pot generating oil smoke, the negative pressure loss is large, and the oil smoke rising above the pot easily escapes from two sides of a smoke collecting cover, so that the oil smoke suction effect is poor. In order to improve the effect of the range hood, people improve the structure of the range hood, wherein a fan system of the range hood is improved in a common way, for example, the power of a fan is increased, the structure of an impeller is improved, and the like.

In the prior art, the smoke exhaust effect is improved by preventing the oil smoke from escaping through the structure of the smoke guide plate, most of the smoke guide plate is fixedly connected with the smoke collecting hood through bolts, and tools are needed when the smoke guide plate is disassembled and assembled, so that the assembly and disassembly are inconvenient; also some smoke guide plates are installed on the smoke collecting cover through magnetic attraction matching, for example, the Chinese utility model patent with the patent number of CN201922006250.7 (the publication number of grant is CN211372543U) discloses a "connecting piece and a range hood applying the connecting piece", wherein the connecting piece includes support body and location axle, the support body has relative first end and second end, first end is provided with and is used for the first magnet that links to each other with outside first installation basis, the second end is provided with and is used for the second magnet that links to each other with outside second installation basis, first magnet is passed and can get into first installation basis, the other end of location axle passes second magnet, and the smoke collecting cover constitutes the part at smoke collecting cavity top and regards as foretell first installation basis, and the smoke guide plate regards as foretell second installation basis. Through the first magnet that is used for linking to each other with outside first installation basis that sets up at the first end of support body and set up the second magnet that is used for linking to each other with outside second installation basis at the second end of support body to realize the quick assembly disassembly on support body and first installation basis and second installation basis.

However, the adsorption force of the magnet suddenly drops as the distance between the magnet and the adsorbed object (such as the smoke guide plate) becomes longer, which may cause the user to pull the smoke guide plate with a great force during the magnet adsorption, but once the magnet is separated from the adsorbed object, the required pulling force may be reduced, which may cause the user to experience poor detachment; similar problem also can appear in the installation when leading cigarette board in addition, when leading cigarette board and be about to contact magnet, the adsorption affinity of magnet increases suddenly, leads cigarette board and can adsorb on the collection cigarette cover in the twinkling of an eye, and user's installation is experienced poorly.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a connection structure for the current situation of the prior art, which can prevent the second component from being suddenly attracted by the magnet due to the sudden increase of the attraction force of the magnet when the first component and the second component are installed; and when the first component and the second component are disassembled, the attraction force of the magnet is suddenly reduced, so that the second component is suddenly separated from the magnet.

The second technical problem to be solved by the present invention is to provide a range hood using the above connection structure, aiming at the current situation of the prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: a coupling structure for detachably coupling a first member and a second member together, characterized in that: the connecting structure comprises

The upper end of the shell is fixedly arranged on the first component, and the bottom of the shell is provided with an opening;

the magnet can be installed in the shell in a vertically moving mode, and the lower end of the magnet can extend out of the opening to be matched with the second component in a magnetic attraction mode;

the first elastic piece acts on the magnet to enable the magnet to always keep the trend of moving downwards;

the limiting rod is vertically arranged in the magnet in a penetrating mode and can move up and down relative to the magnet, the limiting rod can move to a first position and a second position, the lower end face of the limiting rod is located below the lower end face of the magnet in the state that the limiting rod is located at the first position, and the magnet and the second component are located in a desorption state; and when the limiting rod is in the second position, the lower end surface of the limiting rod is hidden in the magnet, and the magnet and the second component are in a magnetic attraction state.

And the pressing positioning structure is arranged in the shell, is connected with the limiting rod and can position the limiting rod at a first position or a second position.

The lower terminal surface of gag lever post hides in magnet, can be the lower terminal surface parallel and level of gag lever post and magnet, preferably, under the state that the gag lever post is in the second position, the lower terminal surface of magnet is located the below of the lower terminal surface of gag lever post, and the gag lever post does not contact with the up end of leading cigarette board completely like this, can not exert force on leading cigarette board, can not influence the suction of magnet to leading cigarette board promptly, guarantees the fastness that magnet adsorbs leading cigarette board.

The pressing and positioning structure can be in various structural forms, preferably, the pressing and positioning structure adopts a structural form of a pressing type ball pen, the upper end face of the limiting rod is provided with sawtooth-shaped upper end face teeth, and the pressing and positioning structure comprises

The limiting device comprises a limiting cylinder, at least two convex blocks are arranged on the inner peripheral wall of the limiting cylinder at intervals along the circumferential direction of the limiting cylinder, a vertically extending sliding groove is formed between every two adjacent convex blocks, a limiting groove is formed in the upper end face of each convex block, the limiting groove is provided with a connected inclined plane and a connected straight plane, and the straight plane extends vertically;

the positioning rod is positioned above the limiting rod and is connected with the limiting rod through a connecting rod, the positioning rod can rotate circumferentially relative to the limiting rod, a convex rib which extends vertically and can move along the sliding groove is arranged on the peripheral wall surface of the positioning rod, the lower end surface of the convex rib is a diagonal plane which can be matched with the inclined plane of the upper end surface tooth, and the diagonal plane can be abutted against and pressed on the inclined plane and the upper end surface tooth of the limiting groove;

the second elastic piece acts on the positioning rod, so that the positioning rod always keeps the trend that the inclined plane of the convex rib is in tooth contact with the upper end face of the limiting rod.

In order to prevent that the locating lever from rotating the in-process, driving the gag lever post and rotating, be equipped with the guide way of vertical extension on the lug, be equipped with on the periphery wall of gag lever post and follow the gliding guide block of guide way. The guide block is matched with the guide groove, so that the limiting rod can only axially move and cannot rotate, and in the first stage, the convex rib of the positioning rod moves along the sliding groove, and the positioning rod and the limiting rod can only axially move; at the second stage, after the convex rib is separated from the sliding groove, although the positioning rod can rotate in the circumferential direction, the limiting rod still can only move in the axial direction due to the matching of the guide groove to the guide block.

In order to judge whether the smoke guide plate is installed in place, a metal sensor is arranged in the shell, and a metal piece capable of being detected by the metal sensor when the limiting rod moves to the second position is arranged on the limiting rod. The metal sensor detects the metal piece, and the smoke guide plate is installed in place.

In order to facilitate the arrangement of the metal sensor and enable the metal sensor to sense the metal piece, the metal sensor is arranged on the mounting seat, the mounting seat is positioned on the outer side of the limiting cylinder, and the shell is provided with a wire passing hole penetrating through the wall thickness of the shell.

In order to facilitate the arrangement of all parts in the shell, an upper cavity and a lower cavity are arranged in the shell, the opening is communicated with the lower cavity, the first elastic piece and the magnet are arranged in the lower cavity, the limiting cylinder is fixedly arranged in the upper cavity, and a through hole for the limiting rod to pass through is formed between the upper cavity and the lower cavity.

In order to prevent the magnet from completely separating from the shell under the action of the first elastic piece, the longitudinal section of the magnet is T-shaped and comprises a transverse part and a vertical part connected with the transverse part, the vertical part can be movably inserted into the opening, the transverse part can abut against the bottom wall of the lower cavity, the magnet moves to a lower limit position under the condition that the transverse part abuts against the bottom wall of the lower cavity, and the lower end of the vertical part is positioned outside the shell.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the range hood applying the connecting structure is characterized in that: still include collection petticoat pipe and smoke deflector, collection petticoat pipe inboard is formed with the collection smoke chamber of upwards sunken, and the collection petticoat pipe is as first part, and the second part is smoke deflector, and casing fixed mounting is located the position at collection smoke chamber top at collection petticoat pipe, and magnet can inhale the cooperation with smoke deflector's up end magnetism.

Preferably, still be equipped with the couple subassembly between collection petticoat pipe and the smoke deflector, the couple subassembly includes the couple frame and the couple of mutual block, the rear portion of smoke deflector is located to the couple subassembly, connection structure sets up the front portion at smoke deflector. During assembly, the hook is hung on the hook frame, and then the magnet is connected with the smoke guide plate; when the cigarette guide hook is detached, the magnet is separated from the cigarette guide plate, and then the hook is taken down from the hook frame.

Compared with the prior art, the invention has the advantages that: according to the invention, the limiting rod is arranged, the limiting rod can be positioned at two positions relative to the magnet, when the second part is installed, the limiting rod is positioned at the first position, at the moment, the upper end surface of the second part is firstly contacted with the limiting rod and then gradually moves upwards to be contacted with the magnet, so that the phenomenon that the attraction force is suddenly increased due to the fact that the second part is directly contacted with the magnet and is violently attracted to the magnet is prevented; when the second part is detached, the limiting rod is moved to the first position again, the second part is gradually separated from the magnet in the process that the lower end face of the limiting rod is moved to the lower end face of the magnet, the phenomenon that the second part is suddenly separated from the magnet due to the sudden decrease of the attraction force of the magnet is avoided, and the situation that the hand feeling of a user is poor when the magnet is attracted to and separated from the second part can be reduced due to the arrangement of the limiting rod; when the connecting structure is applied to the range hood, the use hand feeling of a user for dismounting the smoke guide plate can be improved.

Drawings

Fig. 1 is a schematic structural diagram of a range hood according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic structural view of the connection structure of FIG. 1;

FIG. 4 is an exploded view of FIG. 3;

FIG. 5 is a schematic structural view of the stop lever of FIG. 4;

FIG. 6 is a schematic structural view of the positioning rod of FIG. 4;

FIG. 7 is a schematic structural view of the limiting cylinder in FIG. 4;

FIG. 8 is a structural diagram of the bump in FIG. 7;

FIG. 9 is a partial schematic view of the housing of FIG. 4;

FIG. 10 is a schematic structural view of the mounting base of FIG. 4;

FIG. 11 is a cross-sectional view of FIG. 3;

FIG. 12 is a cross-sectional view in another direction of FIG. 3;

FIG. 13 is a cross-sectional view of the press locating feature and limiting rod of FIG. 3 (with the limiting rod in a first position);

FIG. 14 is a cross-sectional view of the press locating feature and stop lever of FIG. 3 (with the stop lever in a second position);

FIG. 15 is a schematic view of the state of FIG. 3 (with the stop lever in a first position);

FIG. 16 is a schematic view of the state of FIG. 3 (the stop lever in the upper limit position);

fig. 17 is a state diagram of fig. 3 (the stopper rod is ejected downward to the second position).

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 17, the range hood of the preferred embodiment includes a smoke collecting hood 6, a smoke guide plate 7, a connecting structure and a hook assembly, wherein a smoke collecting cavity 61 which is recessed upwards is formed inside the smoke collecting hood 6, the smoke guide plate 7 is located below the top wall of the smoke collecting hood 6, the connecting structure and the hook assembly are both used for detachably connecting the smoke collecting hood 6 and the smoke guide plate 7 together, the smoke collecting hood 6 is referred to as a first component, and the smoke guide plate 7 is referred to as a second component.

Wherein connection structure includes casing 1, magnet 2, first elastic component 21, gag lever post 3 and presses location structure, 1 upper end fixed mounting of casing is in the position at collection cigarette chamber 61 top of being located of collection petticoat pipe 6, opening 11 has been seted up to the lower part of casing 1, magnet 2 can install in casing 1 with reciprocating, magnet 2 remains the trend of downstream all the time under the effect of first elastic component 21, and the lower extreme of magnet 2 can extend opening 11 and smoke deflector 7's up end magnetism to inhale the cooperation.

The gag lever post 3 is vertical to be worn to establish in magnet 2 and can reciprocate for magnet 2, presses location structure and locates in casing 1, presses the structure of pressing that location structure adopted the ballpoint, and gag lever post 3 links to each other with pressing location structure, and gag lever post 3 can move to first position and second position under the effect of pressing location structure.

When the limiting rod 3 is in the first position, the lower end surface of the limiting rod 3 is positioned below the lower end surface of the magnet 2, and the magnet 2 and the second component are in a desorption state; in the state that the limiting rod 3 is at the second position, the lower end surface of the limiting rod 3 is hidden in the magnet 2, in the embodiment, the lower end surface of the magnet 2 is located below the lower end surface of the limiting rod 3, and the magnet 2 and the second component can be in a magnetic attraction state.

The up end of gag lever post 3 is equipped with up end tooth 31, in this embodiment, the up end of gag lever post 3 is wavy upper end tooth 31 in order to form the cockscomb structure, press down location structure and include locating lever 42, second elastic component 43 and spacing section of thick bamboo 41, locating lever 42 is located the top of gag lever post 3 and the two links to each other through connecting rod 421, connecting rod 421 inserts and establishes in gag lever post 3, slot 30 has been seted up downwards from the top on the gag lever post 3, connecting rod 421 insert establish in slot 30 and can rotate slot 30 relatively.

The outer peripheral wall surface of the positioning rod 42 is provided with a vertically extending rib 422, the lower end surface of the rib 422 is a chamfered surface 4221 capable of being matched with the inclined surface 4131 of the upper end surface teeth 31, and the chamfered surface 4221 can be pressed against the upper end surface teeth 31 and the inclined surface 4131 of the limiting groove 413 described below.

The second elastic member 43 acts on the positioning rod 42, so that the positioning rod 42 always maintains a tendency that the chamfered surface 4221 of the rib 422 contacts the upper end surface teeth 31 of the stopper rod 3. When the smoke guide plate 7 is pushed upward, the limit rod 3 moves upward along with the smoke guide plate, and pushes the positioning rod 42 to move upward. When the stopper rod 3 moves downward, the positioning rod 42 also moves downward by the second elastic member 43, and the chamfered surface 4221 of the rib 422 is always in contact with the upper end face teeth 31 of the stopper rod 3. In this embodiment, the second elastic member 43 is a spring, and both ends of the spring respectively abut against the top of the positioning rod 42 and the top wall of the limiting cylinder 41.

At least two lugs 411 are arranged on the inner peripheral wall of the limiting cylinder 41 at intervals along the circumferential direction of the limiting cylinder, in the embodiment, the lugs 411 are three, a sliding groove 412 which is vertically extended and is used for the convex rib 422 to slide in the sliding groove is formed between two adjacent lugs 411, and the positioning rod 42 can rotate circumferentially relative to the limiting rod 3, so that the convex rib 422 can be sequentially arranged in each sliding groove 412.

The upper end surface of each bump 411 is provided with a limiting groove 413 which can be clamped with the convex rib 422, the limiting groove 413 is provided with an inclined surface 4131 and a straight surface 4132 which are connected, the straight surface 4132 vertically extends, and the straight surface 4132 can be abutted against the convex rib 422. In addition, be equipped with vertical extension's guide way 4111 on the lug 411, be equipped with on the periphery wall of gag lever post 3 and follow the gliding guide block 32 of guide way 4111, when the cooperation of guide block 32 and guide way 4111 guaranteed that locating lever 42 rotates, gag lever post 3 can not rotate thereupon.

In addition, as part of users can detach the smoke guide plate 7 to use and operate the range hood, the range hood is unfavorable for the oil smoke absorption effect, and therefore the users are advised to use the range hood after installing the smoke guide plate 7. In order to judge whether the smoke guide plate 7 is installed in place, a metal sensor 51 is arranged in the shell 1, and a metal piece 52 which can be detected by the metal sensor 51 when the limiting rod 3 moves to the second position is arranged on the limiting rod. The metal sensor 51 is installed on the installation base 511, a slot 5111 for the metal sensor 51 to be partially inserted into is formed in the installation base 511, the installation base 511 is located on the outer side of the limiting cylinder 41, a wire passing hole 12 penetrating the wall thickness of the installation base is formed in the shell 1, and a lead of the metal sensor 51 passes through the wire passing hole 12 and is connected with a controller on the range hood.

In addition, the smoke guide plate 7 is an important smoke guide structure, generally, a user is advised to clean once a month, but the range hood of different users has different use frequencies, some users only have one meal or less every day, the smoke guide plate 7 does not need to be cleaned according to the frequency of cleaning once a month, at the moment, whether cleaning is needed or not can be judged according to the installation state of the smoke guide plate 7, after the range hood is started and operated every time, the controller automatically judges whether the metal piece 52 is detected by the metal sensor 51 (whether the second elastic piece 43 is in a compression state) or not, the total operation time T of the range hood in the state is calculated, and when the total operation time T is more than or equal to the preset reminding cleaning time T, the user is reminded to clean the smoke guide plate 7.

In order to facilitate the arrangement of the components of the connection structure, an upper chamber 13 and a lower chamber 14 are arranged in the housing 1, the opening 11 is communicated with the lower chamber 14, the first elastic element 21 and the magnet 2 are both arranged in the lower chamber 14, the longitudinal section of the magnet 2 is T-shaped and comprises a transverse portion 22 and a vertical portion 23 connected with the transverse portion 22, the vertical portion 23 can be movably inserted into the opening 11, and the transverse portion 22 can abut against the bottom wall of the lower chamber 14. The first elastic member 21 is a spring, and both ends thereof abut against the top wall and the lateral portion 22 of the lower chamber 14, respectively.

The limiting cylinder 41 is fixedly arranged in the upper chamber 13, a through hole 15 for the limiting rod 3 to pass through is arranged between the upper chamber 13 and the lower chamber 14, and a dovetail groove type clamping groove 131 for the mounting seat 511 to be arranged in is formed in the inner peripheral wall of the upper chamber 13.

Casing 1 includes body 16 and upper cover 17 and lower cover 18, the open first recess in top has been seted up on casing 1 upper portion, the open second recess in bottom has been seted up to casing 1 lower part, thereby upper cover 17 lid is established at first recess top and is formed upper chamber 13, thereby lower cover 18 lid is established and is formed lower chamber 14 in second recess bottom, the upper cover, casing 1 and collection petticoat pipe 6 pass through the screw and link to each other, lower cover also passes through the screw with casing 1 and links to each other.

The working process of the connecting structure of the embodiment is as shown in the figure:

state 1 as in fig. 13, 15: at the moment, the limiting rod 3 is in an ejecting state, the top of the convex rib 422 on the positioning rod 42 is positioned at the lower part of the sliding groove 412 on the limiting cylinder 41, the lower end face of the magnet 2 is positioned outside the shell 1, the distance from the lower end face of the magnet 2 to the lower end face of the shell 1 is marked as c, the lower end face of the limiting rod 3 is lower than the lower end face of the magnet 2, the distance from the limiting rod 3 to the lower end face of the shell 1 is marked as d, the limiting rod 3 is positioned at the first position, the upper end face of the smoke guide plate 7 is in contact with the lower end face of the limiting rod 3, the upper end face of the smoke guide plate 7 has a certain distance from the lower end face of the magnet 2, and the suction force is very small and is not enough to suck up the smoke guide plate 7;

state 2: the user pushes the smoke guide plate 7 upwards, the limit rod 3 and the positioning rod 42 are both pushed upwards, the convex rib 422 moves upwards along the sliding groove 412, the second elastic part 43 is compressed until the upper end surface of the smoke guide plate 7 contacts the lower end surface of the magnet 2, the smoke guide plate 7 continues to be pushed upwards, the first elastic part 21 is also compressed until the limit rod 3 and the magnet 2 both move to the upper limit position, the lower end surface of the limit rod 3 and the lower end surface of the magnet 2 are in the same plane (as shown in fig. 16), the magnet 2 attracts the smoke guide plate 7, the convex rib 422 is separated from the sliding groove 412, the limit rod 3 continues to be pushed upwards, because the detent lever 42 has reached the upper limit position, the detent lever 42 will rotate circumferentially, the lower end of the convex rib 422 is positioned right above the clamping groove, and the distance from the lower end face of the limiting rod 3, the lower end face of the magnet 2 and the upper end face of the smoke guide plate 7 to the lower end face of the shell 1 is a.

State 3 as in fig. 14, 17: at this time, the user releases his hand, the magnet 2 will bounce downwards under the action of the first elastic element 21 and the limiting rod 3 under the action of the second elastic element 43, since the positioning rod 42 is rotated in a circumferential direction with respect to the state shown in fig. 15, when the stopper rod 3 rebounds downward, the positioning rod 42 moves downwards until the lower end face of the convex rib 422 is clamped in the limiting groove 413, and the positioning rod 42 cannot move downwards continuously, so that the limiting rod 3 cannot rebound to the original length d after rebounding, but rebounds a short distance b, while the magnet 2 can rebound to the original distance c, c > b, the lower terminal surface of magnet 2 is located the below of the lower terminal surface of gag lever post 3 promptly, and gag lever post 3 is in the second position this moment, and lead cigarette board 7 and magnet 2 and descend simultaneously to the distance c after, lead cigarette board 7 and can be held by the suction of magnet 2, guarantee that lead cigarette board 7 can not drop.

When a user wishes to detach the smoke guide plate 7, the smoke guide plate 7 is pushed upwards again to a distance a, so that the limiting rod 3 and the positioning rod 42 move to the upper limit position, the limiting rod 3 continues to be pushed upwards, the positioning rod 42 cannot move upwards, circumferential rotation can occur under the action of the teeth 31 on the upper end face of the limiting rod 3, the convex rib 422 rotates to the position above the other sliding groove 412, when the smoke guide plate 7 is not pushed upwards, the convex rib 422 moves downwards along the sliding groove 412 to restore to the state shown in fig. 15, and at the moment, the smoke guide plate 7 is separated from the magnet 2, so that the smoke guide plate 7 is detached.

Still be equipped with couple subassembly 8 between collection petticoat pipe 6 and the smoke deflector 7, couple subassembly 8 can adopt the structure of the couple subassembly in CN201922006250.7, including the couple frame 81 and the couple 82 of mutual block, couple subassembly 8 has two sets ofly to locate the rear portion of smoke deflector 7 along the left and right direction interval, connection structure has two sets ofly, sets up the anterior at smoke deflector 7 along the left and right direction interval.

Because the lower part of the range hood is the open fire of the cooking bench, the situation that the open fire or the dry burning of the cooker is not available is possible, so the magnet 2 with the highest grade is selected as much as possible during the model selection of the magnet 2, the temperature-resistant effect is better, and at least the grade of the magnet 2 with the grade above SH is needed; the smoke guide 7 may be made of a common cold-rolled steel sheet, but may be made of other materials that can be attracted by the magnet 2.

The existing smoke guide plate and smoke collecting cover magnetic attraction matching mode has the defects that: when the smoke guide plate 7 is close to the magnet 2, in the process that the distance is gradually reduced, the suction force of the magnet 2 is suddenly increased, so that the smoke guide plate 7 is suddenly sucked by the magnet 2; when dismantling, the user pulls open smoke deflector 7 and magnet 2, and the suction of magnet 2 can suddenly reduce, causes smoke deflector 7 to break away from the phenomenon of magnet 2 suddenly, can seriously influence user's use and experience. The connection structure of this embodiment's advantage lies in can alleviateing magnet 2 and leading cigarette board 7 actuation, leading to the user to use the not good condition of feeling when breaking away from, can use the second elastic component 43 to act on the elasticity on gag lever post 3 with fall the suction of magnet 2 and leading cigarette board 7 for dismantle and feel and obviously promote. In addition, in the design of the existing smoke guide plate 7, an installation buckle needs to be welded on the smoke guide plate 7, so that the upper end surface of the smoke guide plate 7 has two installation buckles instead of a plane, and the cleanness of the smoke guide plate 7 is seriously influenced; the installation mode that magnet 2 and smoke deflector 7 magnetism were inhaled can make smoke deflector 7 up end do not have the installation buckle, has made things convenient for the user to clean.

The installation mode of the smoke guide plate 7 is schematically shown in fig. 2, the rear side is installed in a hook mode, and the front side is installed in a connecting structure mode. At this time, if the magnet 2 needs to adsorb the smoke guide 7, the suction force thereof needs to be at least mg/4. Namely, it is

F_t＞mg/4

Wherein F_tThe attraction of the single magnet 2 to the smoke guide plate 7 is shown, m is the mass of the smoke guide plate 7, and g is the gravity coefficient. As the smoke guide plate 7 is an easily-detached part for a user and the installation position of the smoke guide plate is arranged on a cooker of the user, a larger safety factor needs to be reserved, and the safety factor is set to be 2, then

The spring constant of the second elastic member 43 is denoted by k, the elastic force of the second elastic member 43 to the smoke guide plate 7 immediately after the smoke guide plate 7 and the magnet 2 are in contact is denoted by Fp, and the compression distance of the second elastic member 43 at this time is denoted by h, then

F_p＝kh

For better disassembling experience of the user, it is set that the closer the force required to be applied to the smoke guide plate 7 by the user when pushing in or removing the smoke guide plate 7 is to the gravity of the smoke guide plate 7 itself, the better the elastic force of the second elastic member 43 is equal to the attraction force of the magnet 2 and the smoke guide plate 7. Then

F_t＝F_p＝kh

Thereby determining the performance of the magnet 2 and the spring parameters of the second elastic member 43.

However, since the attraction force of the magnet 2 and the elastic force of the second elastic member 43 are not exactly equal to each other in actual circumstances, it is preferable to limit the two parameters to a range, that is, to

Claims

1. A coupling structure for detachably coupling a first member and a second member together, characterized in that: the connecting structure comprises

The upper end of the shell (1) is fixedly arranged on the first component, and an opening (11) is formed in the bottom of the shell (1);

the magnet (2) is arranged in the shell (1) in a vertically movable mode, and the lower end of the magnet (2) can extend out of the opening (11) of the shell (1) to be matched with the second component in a magnetic attraction mode;

the first elastic piece (21) acts on the magnet (2) to enable the magnet (2) to always keep the trend of moving downwards;

the limiting rod (3) vertically penetrates through the magnet (2) and can move up and down relative to the magnet (2), the limiting rod (3) can move to a first position or a second position, the lower end face of the limiting rod (3) is located below the lower end face of the magnet (2) in the state that the limiting rod (3) is located at the first position, and the magnet (2) and the second component are located in a desorption state; when the limiting rod (3) is in the second position, the lower end face of the limiting rod (3) is hidden in the magnet (2), and the magnet (2) and the second component can be in a magnetic attraction state;

the pressing positioning structure is arranged in the shell (1), is connected with the limiting rod (3) and can position the limiting rod (3) at a first position or a second position.

2. The connection structure according to claim 1, wherein: and under the state that the limiting rod (3) is at the second position, the lower end surface of the magnet (2) is positioned below the lower end surface of the limiting rod (3).

3. The connection structure according to claim 2, wherein: the upper end face of the limiting rod (3) is provided with serrated upper end face teeth (31), and the pressing and positioning structure comprises

The limiting device comprises a limiting cylinder (41), wherein at least two convex blocks (411) are arranged on the inner peripheral wall of the limiting cylinder (41) at intervals along the circumferential direction of the limiting cylinder, a vertically extending sliding groove (412) is formed between every two adjacent convex blocks (411), a limiting groove (413) is formed in the upper end face of each convex block (411), each limiting groove (413) is provided with a connected inclined plane (4131) and a flat plane (4132), and the flat planes (4132) extend vertically;

the positioning rod (42) is positioned above the limiting rod (3) and connected with the limiting rod (3) through a connecting rod (421), the positioning rod (42) can rotate circumferentially relative to the limiting rod (3), a convex rib (422) which vertically extends and can move along the sliding groove (412) is arranged on the peripheral wall surface of the positioning rod (42), the lower end surface of the convex rib (422) is a diagonal plane (4221) which can be matched with the inclined plane (4131) of the upper end surface tooth (31), and the diagonal plane (4221) can be pressed against the inclined plane (4131) of the limiting groove (413) and the upper end surface tooth (31);

and the second elastic piece (43) acts on the positioning rod (42) to enable the positioning rod (42) to always keep the trend that the inclined cutting surface (4221) of the convex rib (422) is contacted with the upper end surface teeth (31) of the limiting rod (3).

4. The connection structure according to claim 3, wherein: be equipped with vertical extension's guide way (4111) on lug (411), be equipped with on the periphery wall of gag lever post (3) and follow gliding guide block (32) of guide way (4111).

5. The connection structure according to claim 3 or 4, wherein: be equipped with metal sensor (51) in casing (1), be equipped with on gag lever post (3) and can be detected by metal sensor (51) metalwork (52) when it moves to the second position.

6. The connection structure according to claim 6, wherein: the metal sensor (51) is installed on the installation seat (511), the installation seat (511) is located on the outer side of the limiting cylinder (41), and the shell (1) is provided with a wire passing hole (12) penetrating through the wall thickness of the shell.

7. The connection structure according to claim 3 or 4, wherein: have last cavity (13) and lower cavity (14) in casing (1), opening (11) and lower cavity (14) intercommunication of casing (1), first elastic component (21) and magnet (2) are all located in lower cavity (14), spacing section of thick bamboo (41) are fixed to be located in last cavity (13), it supplies perforation (15) that gag lever post (3) passed to be equipped with between last cavity (13) and lower cavity (14).

8. The connection structure according to claim 7, wherein: the longitudinal section of the magnet (2) is T-shaped, the magnet comprises a transverse part (22) and a vertical part (23) connected with the transverse part (22), the vertical part (23) can be movably inserted into the opening (11) of the shell (1), and the transverse part (22) can abut against the bottom wall of the lower cavity (14).

9. A range hood applying the connection structure of any one of claims 1 to 8, wherein: still include collection petticoat pipe (6) and smoke deflector (7), collection petticoat pipe (6) inboard is formed with the collection cigarette chamber (61) of upwards sunken, and collection petticoat pipe (6) conduct first part, smoke deflector (7) conduct the second part, casing (1) fixed mounting are in the position that is located collection cigarette chamber (61) top of collection petticoat pipe (6), and magnet (2) can be with the up end magnetic attraction cooperation of smoke deflector (7).

10. The range hood of claim 9, wherein: still be equipped with couple subassembly (8) between collection petticoat pipe (6) and smoke deflector (7), couple subassembly (8) are including couple frame (81) and couple (82) of mutual block, the rear portion of smoke deflector (7) is located in couple subassembly (8), connection structure sets up the front portion at smoke deflector (7).