CN109990346B

CN109990346B - Fume exhauster

Info

Publication number: CN109990346B
Application number: CN201711490397.7A
Authority: CN
Inventors: 何海浪; 任树栋; 马晓阳; 李斌
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2017-12-30
Filing date: 2017-12-30
Publication date: 2024-01-16
Anticipated expiration: 2037-12-30
Also published as: CN109990346A

Abstract

The utility model relates to a range hood, which comprises a fume collecting hood and is characterized by further comprising a fume guide plate arranged below the fume collecting hood, wherein connecting feet are arranged at the left side and the right side of the fume guide plate, and a locking device which is arranged on the fume collecting hood and used for locking the connecting feet is arranged on the fume collecting hood, and the relative locking or unlocking of the connecting feet is triggered under the action that the connecting feet extend into the fume collecting hood; compared with the prior art, the smoke collecting hood has the advantages that the locking mechanism is arranged in the smoke collecting hood, the relative locking or unlocking of the connecting feet is triggered by the action that the connecting feet of the smoke guide plate extend into the smoke collecting hood, so that the functions of pushing upwards and downwards, locking and unlocking are realized, and the defect that the existing smoke guide plate needs larger force when being buckled and unbuckled can be avoided.

Description

Fume exhauster

Technical Field

The utility model relates to a range hood, in particular to a range hood with a smoke guide plate below an air inlet of a smoke collecting hood.

Background

At present, common disassembly and assembly modes of smoke guide plates of the range hood in the market are a mode of magnetic steel attraction, a mode of plastic collision beads and a mode of metal lock catches. If the mode of fixing the magnetic steel is adopted, when the smoke guide plate is installed, the hanging hook on the smoke guide plate is positioned on the back surface of the smoke guide plate, and an installer can only observe whether the hanging hook is correctly hung from the side surface of the smoke guide plate, so that the operation is very inconvenient. The smoke guide plate structure of the side-draft range hood comprises a smoke collecting hood and a smoke guide plate, wherein an upper support is arranged at the upper part of the smoke collecting hood, a lower support is arranged at the lower part of the smoke collecting hood, the upper end of the smoke guide plate is rotatably connected with the upper support, and the lower end of the smoke guide plate is magnetically connected with the lower support. The smoke guide plate structure is connected in a magnetic manner, on one hand, after long-time use, the magnetic force can be gradually weakened to be lower than the transverse force generated by the gravity of the smoke guide plate, so that the smoke guide plate falls off, on the other hand, the cost of magnetic fixation is high, and the installation is inconvenient. If the mounting mode of plastic collision beads or metal lock catches is adopted, after the smoke guide plate is dismounted for a plurality of times, the aperture of the locking hole is usually enlarged, so that the smoke guide plate is easy to fall off from the smoke guide plate hanging frame. In addition, the disassembly and assembly structures of other prior smoke guide plates commonly have the defects of more specifications of parts, relatively complex structure and relatively large installation space. In view of the above, the existing smoke guide plate assembling and disassembling structure needs to be further improved.

In addition, the locking and unlocking of the existing various smoke guide plates are basically completed by two different actions, and the force required for the unlocking action is larger, so that the difficulty of disassembling the smoke guide plates of common users is further increased.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a range hood capable of locking or unlocking a smoke guide plate by only a single action.

The technical scheme adopted for solving the technical problems is as follows: this range hood includes:

a fume collecting hood having an air inlet;

the smoke guide plate is arranged below the smoke collecting cover and used for shielding the air inlet, and a gap is reserved between the smoke collecting cover and the air inlet at least when the range hood works so as to enable oil smoke to enter the air inlet through the gap; connecting feet are arranged on the left side and the right side of the smoke guide plate;

it is characterized in that the method also comprises the following steps:

the locking device is arranged on the smoke collecting cover and used for locking the connecting pins;

and the connecting pin can directly or indirectly trigger the locking device under the action of moving towards the direction approaching to the fume collecting hood so as to switch the relative locking or unlocking state of the connecting pin.

In order to facilitate installation and locking of the smoke guide plate, the smoke guide plate is rotatably connected to the rear position of the smoke collecting hood at the rear position of the smoke guide plate, so that the front side position of the smoke guide plate can be turned up and down relative to the smoke collecting hood, and the connecting feet are arranged on the left side and the right side of the front side position of the smoke guide plate.

Further, the locking device comprises:

the lock seat is provided with a transverse guide groove and a vertical guide hole communicated with the transverse guide groove, and the connecting pin of the vertical guide Kong Kerong is inserted into and slides relatively in the vertical guide groove;

the sliding piece is arranged on the transverse guide groove in a sliding manner and extends outwards or contracts inwards transversely relative to the vertical guide hole;

the transmission mechanism is arranged in the lock seat and can drive the sliding piece to slide in the transverse guide groove under the triggering of the connecting pin inserted into the vertical guide hole; the sliding piece transversely extends or contracts inwards relative to the vertical guide hole, so that the connecting pin can be locked or unlocked relatively.

In order to realize the transmission, the selected transmission mode includes various modes such as gear transmission, flexible shaft transmission, hydraulic transmission and gas transmission, and the transmission mechanism can convert upward power when the connecting pin enters the guide hole into the sliding part to transversely move.

Further, the sliding piece is a lock pin with an outer convex part and capable of inserting the outer convex part into a corresponding concave limiting groove on the connecting pin or a lock groove with a concave part and capable of accommodating the corresponding convex limiting pin on the connecting pin to be inserted into the concave part.

The lock pin is provided with an outer protruding part, and is provided with a concave limiting groove corresponding to the outer protruding part of the lock pin, and the lock pin can be driven to slide in the transverse guide groove under the triggering of the connecting pin inserted into the vertical guide hole, so that the lock pin transversely extends or contracts inwards relative to the vertical guide hole; and in the outward extending state of the lock pin, the concave limiting groove of the connecting pin can accommodate the outer convex part of the lock pin to be embedded in the limiting groove.

The locking groove is provided with a concave part, the side wall of the connecting pin is provided with a corresponding convex limiting pin corresponding to the concave part of the locking groove, and the locking groove can be driven to slide in the transverse guide groove under the triggering of the connecting pin inserted into the vertical guide hole, so that the locking groove transversely extends or contracts inwards relative to the vertical guide hole; and in the outward extending state of the locking groove, the concave part of the locking groove can accommodate the convex limit pin of the connecting pin to be embedded therein.

The transmission mechanism can be triggered directly by the connecting pin or indirectly by the connecting pin, wherein the indirectly triggered by the connecting pin is as follows: the lock seat also comprises a touch piece, and the connecting pin enters the vertical guide hole and can indirectly trigger the transmission mechanism to drive the sliding piece to slide under the action of touching the touch piece.

Compared with the prior art, the smoke collecting cover has the advantages that the locking mechanism is arranged in the smoke collecting cover, the relative locking or unlocking of the connecting feet is triggered by the action that the connecting feet of the smoke guide plate extend into the smoke collecting cover, so that the functions of pushing upwards, locking and unlocking are realized, labor is saved, and the operation difficulty is reduced for a common user to disassemble and assemble the smoke guide plate.

Drawings

FIG. 1 is a schematic cross-sectional view of a smoke-collecting hood with smoke-collecting plates connected by a locking device according to a first embodiment of the present utility model;

FIG. 2 is a schematic diagram of a lock base of a locking device according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view taken at an angle to FIG. 2;

FIG. 4 is a schematic view showing a structure of a locking device in an initial state according to a first embodiment of the present utility model;

FIG. 5 is a schematic view of a locking device in a half-locked state according to a first embodiment of the present utility model;

FIG. 6 is a schematic view of a locking device in a fully locked state according to a first embodiment of the present utility model;

FIG. 7 is a schematic view of a push rod according to a first embodiment of the present utility model;

FIG. 8 is a schematic diagram of a connecting pin according to a first embodiment of the present utility model;

FIG. 9 is a schematic cross-sectional view of a smoke-collecting hood with smoke-collecting plates connected by a locking device according to a second embodiment of the present utility model;

FIG. 10 is a schematic diagram of a lock base of a locking device according to a second embodiment of the present utility model;

FIG. 11 is a schematic view of a locking device in a locked state according to a second embodiment of the present utility model;

FIG. 12 is a schematic view of a locking device in an unlocked state according to a second embodiment of the present utility model;

fig. 13 is a schematic structural view of a limiting member at a clamping portion when the locking device is in a locked state in the second embodiment of the present utility model;

FIG. 14 is a cross-sectional view of FIG. 11;

FIG. 15 is a schematic cross-sectional view showing the smoke guide plate in an unlocked state with the smoke collecting hood according to the second embodiment of the present utility model;

FIG. 16 is a schematic cross-sectional view of a smoke-collecting hood with smoke-guiding plate connected by a locking device according to a third embodiment of the utility model;

FIG. 17 is a schematic cross-sectional view showing the smoke guide plate in an unlocked state with the smoke collecting hood according to the third embodiment of the present utility model;

fig. 18 is a schematic structural view of a locking device in an unlocked state in a third embodiment of the present utility model;

FIG. 19 is a schematic view showing a locking device in a locked state according to a third embodiment of the present utility model;

FIG. 20 is a schematic view showing the structure of a connecting pin in a locking device according to a third embodiment of the present utility model;

FIG. 21 is a schematic view of a push rod according to a third embodiment of the present utility model;

FIG. 22 is a schematic diagram of a bump in a third embodiment of the present utility model;

FIG. 23 is a schematic cross-sectional view showing the connection of smoke-collecting plates to a smoke-collecting hood by a locking device according to a fourth embodiment of the present utility model;

FIG. 24 is a schematic view showing a locking device in an unlocked state according to a fourth embodiment of the present utility model;

FIG. 25 is a partial cross-sectional view of FIG. 24;

fig. 26 is a schematic structural view of a locking device in a locked state in a fourth embodiment of the present utility model;

FIG. 27 is a schematic view showing the structure of a guide cylinder in a fourth embodiment of the present utility model;

FIG. 28 is a schematic view of a guide post according to a fourth embodiment of the present utility model;

FIG. 29 is a schematic view showing a structure of a lock base in a locking device according to a fourth embodiment of the present utility model;

FIG. 30 is a schematic view of a fourth embodiment of the present utility model;

FIG. 31 is a schematic view showing a locking device in an unlocked state according to a fifth embodiment of the present utility model;

FIG. 32 is a cross-sectional view of FIG. 31;

FIG. 33 is a schematic view showing a locking device in a locked state according to a fifth embodiment of the present utility model;

FIG. 34 is a cross-sectional view of FIG. 33;

FIG. 35 is a schematic view of a fifth embodiment of the present utility model;

FIG. 36 is a cross-sectional view of a lock base in a fifth embodiment of the present utility model;

FIG. 37 is a cross-sectional view of FIG. 32;

FIG. 38 is a schematic view of a guide block in a fifth embodiment of the present utility model;

fig. 39 is a schematic structural view of an elastic clip according to a fifth embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

1-8, the range hood of the present embodiment comprises a fume collecting hood 1 and a fume guide plate 2 arranged below the fume collecting hood 1, wherein the fume collecting hood 1 is provided with an air inlet, the fume guide plate is arranged below the fume collecting hood and is used for shielding the air inlet, and a gap is reserved between the fume collecting hood and the air inlet at least when the range hood works so as to allow fume to enter the air inlet through the gap; the left and right sides position of the rear end part of the fume collecting hood 1 is respectively provided with a clamping part 11 and the left and right sides position of the rear side part of the fume guiding plate 2 is respectively provided with a clamping hook 22 matched with the clamping part 11, the clamping part 11 and the clamping hook 22 form detachable rotary connection so that the fume guiding plate 2 can turn up and down relative to the fume collecting hood 1, the rear end part of the fume collecting hood 1 is respectively provided with the clamping hook 22 matched with the clamping part 11, and the left and right sides position of the rear side part of the fume guiding plate 2 is respectively provided with the clamping hook 22 matched with the clamping part 11. The left and right sides of the front side of the smoke guide plate 2 are respectively provided with a connecting pin 21, the left and right sides of the front end of the smoke collecting hood 1 are respectively provided with a locking device 3 at corresponding positions, and the relative locking or unlocking of the connecting pins 21 is triggered under the action that the connecting pins 21 extend into the smoke collecting hood 1, and the connecting pins 21 at the left and right sides have the same structure, so that the following description of the left connecting pin 21 is also applicable to the right connecting pin 21, and the description is given by the connecting pins 21.

As shown in fig. 1 to 6, specifically, the locking device 3 includes a lock seat 31 and a lock pin 32 that can telescope inside and outside relative to the lock seat 31, a vertical guiding hole 311 for the connection pin 21 to enter is provided at the bottom of the lock seat 31, the connection pin 21 is in a straight plate shape matching with the shape of the vertical guiding hole 311, a sliding block 33 that is driven to slide by the connection pin 21 is provided above the opening of the lock seat 31, the sliding block 33 is further connected with a transmission mechanism that is linked with the lock pin 32, and in a state that the connection pin 21 enters the vertical guiding hole 311 and drives the sliding block 33 to move upwards, the transmission mechanism can be triggered and drive the extension or retraction of the lock pin 32. In order to realize that the smoke guide plate 2 is locked relative to the smoke collecting hood 1 and is hung below the smoke collecting hood 1, a sliding groove 312 for sliding a sliding block 33 is formed above a vertical guide hole 311 in a lock seat 31, the width of the sliding groove 312 is larger than that of the vertical guide hole 311, a step 313 for limiting the sliding block 33 is formed between the bottom of the sliding groove 312 and the top of the vertical guide hole 311, a limiting groove 211 for enabling a lock pin 32 to extend outwards or retract inwards is formed in the side wall of a connecting foot 21, and the length of the limiting groove 211 is larger than the diameter of the lock pin 32; and, the connecting pin 21 drives the slider 33 to slide, and has four mating states as follows:

in the initial state, the connecting pin 21 is ready to extend into the vertical guide hole 311, the bottom of the sliding block 33 is propped against the step 313, the transmission mechanism is not touched, and the lock pin 32 is retracted into the limit groove 211, as shown in fig. 4;

in the half-locking state, the connecting pin 21 stretches into the vertical guide hole 311 to push the sliding block 33 to be away from the step 313, the transmission mechanism is triggered, and the lock pin 32 stretches out of the limit groove 211 or the lower end part of the limit groove 211;

in the full locking state, the sliding block 33 falls back to the step 313 again, the transmission mechanism is triggered, and the locking pin 32 extends out of the upper end part of the limiting groove 211;

in the unlocked state, the connecting pin 21 pushes the sliding block 33 away from the step 313 again, the transmission mechanism is triggered, and the locking pin 32 is retracted in the limiting groove 211. Since the length of the limit groove 211 is greater than the diameter of the locking pin 32 and allows the slider 33 to fall, the smoke guide plate 2 has a space hanging below the smoke collecting hood 1.

In order to realize the four matching states, the transmission mechanism of the utility model is preferably designed as follows from the aspects of cost and convenience:

the device comprises a push rod 4 connected with a sliding block 33, a rotating rod 5 hinged with the push rod 4 and capable of rotating from an initial state position to a half-lock state position and then rotating to a full-lock state position, and a driving gear 6 and a driven gear 7 which are meshed with each other, wherein the driving gear 6 is coaxially arranged with the rotating rod 5, a lock pin 32 is hinged with the driven gear 7 through a connecting rod 100, the connecting rod 100 is eccentrically arranged with the driven gear 7, the driving gear 6 can rotate along with the rotating rod 5 to realize the extension or retraction of the lock pin 32 on the driven gear 7, the device further comprises a pawl 8 which is arranged on a cavity of a lock seat 31 and is adjacent to the driven gear 7 and is driven to deflect by the driven gear 7, and a first elastic piece 81, preferably a tension spring, is connected to the middle part of the pawl 8, so that the pawl 8 always has a trend of abutting against teeth of the driven gear 7, and the driven gear 7 can only rotate towards the half-lock state position and the unlocking state position. Wherein: the upper end surface of the slider 33 has a first inclined surface 331 inclined obliquely rearward from above downward and having a guide post (not shown), and correspondingly, the end of the push rod 4 also has a second inclined surface 41 inclined obliquely rearward from above downward and having a guide groove (not shown). When the connecting pin 21 stretches into the vertical guide hole 311 to push the sliding block 33 to be far away from the step 313, the guide groove on the second inclined surface 41 of the push rod 4 slides along the guide post on the first inclined surface 331 of the sliding block 33 from front to back, so as to push the rotary rod 5 to drive the driving gear 6 to rotate anticlockwise, namely, the rotary rod 5 rotates forwards and backwards, in order to avoid the clamping of the rotary rod 5 and the push rod 4 in the rotating process, preferably, the hinging position of the rotary rod 5 and the push rod 4 is a kidney-shaped hole, and meanwhile, the transmission ratio of the driven gear 7 and the driving gear 6 is set to be 1:2, when the driving gear 6 rotates 90 ° counterclockwise, the driven gear 7 can rotate 180 ° forward from back to front in the clockwise direction, so as to drive the rotating rod 100 and the lock pin 32 to horizontally translate forward from back to front and extend into the limit groove 211 of the connecting pin 21, as in the semi-locking state shown in fig. 5, in addition, the side wall of the push rod 4 is opened with a guide groove 42, the guide groove 42 is internally provided with a second elastic member 43, preferably a compression spring, the compression spring is embedded in the guide groove 42, one end of the compression spring abuts against the inner side wall of the lock seat 31, and the other end abuts against the bottom of the guide groove 42, and the compression spring enables the push rod 4 to always have a tendency of returning to the initial state position, i.e. moving forward from back. Four through holes 61 are formed in the side wall of the driving gear 6, each through hole 61 is provided with a bump 9, the root of each bump 9 is connected with a third elastic member 91, and the third elastic members 91 enable the bumps 9 to always have a trend of exposing the through holes 61, so that the rotating rod 5 can apply force to the driving gear 6 through the bumps 9 to drive the lock pins 32 to extend or retract. The bump 9 is approximately in a right triangle shape, and of course, the inclined surface of each bump 9 is inclined from top to bottom and then inclined; in a state in which the rotating lever 5 rotates from the initial state position to the half-lock state position, that is, the rotating lever 5 rotates forward, the rotating lever 5 is forced to the driving gear 6 against a vertical surface of one of the projections 9 such as the first projection 9 to drive the lock pin 32 to extend outward; at this time, the sliding block 33 falls back to the step 313 again, the rotating rod 5 is required to rotate reversely under the driving of the restoring force of the first elastic member 81 of the push rod 4, and since the lock pulling piece 8 restricts the driven gear 7 to rotate only clockwise, i.e. from back to front, but cannot drive the driving gear 6 and the driven gear 7 to rotate reversely, therefore, the rotating rod 5 can only press the inclined surface of the first bump 9 to slide into the vertical surface of the adjacent bump 9 (i.e. the second bump 9 positioned in front of the first bump 9) under the pulling of the push rod 4, i.e. the rotating rod 5 rotates reversely, and the rotating rod 5 can rotate from the half-lock state position to the full-lock state position as shown in fig. 5, when the connecting pin 21 pushes the sliding block 33 away from the step 313 again, the push rod 4 is pushed forward and back again, driving the rotating rod 5 to rotate forwardly, so that the lock pin 32 is retracted in the limit groove 211, and unlocking is completed.

When the smoke guide plate 2 is installed, firstly, the smoke guide plate 2 is pushed backwards, the hooks 22 on the left side and the right side of the rear side of the smoke guide plate 2 are hooked into the clamping parts 11 on the left side and the right side of the rear end part of the smoke collecting hood 1, then, the connecting feet 21 on the left side and the right side of the front side of the smoke guide plate 2 extend into the opening of the lock seat 31 in the locking device 3 of the smoke collecting hood 1, the sliding block 33 is pushed away from the step 313 and drives the push rod 4 to be pushed backwards from front to back, and then, the connecting rod, the driving gear 6 and the driven gear 7 are driven to be linked, and finally, the lock pin 32 extends out of the limit groove 211 of the connecting feet 21 or the lower end part of the limit groove 211 to enter a half-locking state; when the sliding block 33 falls back to the step 313 again, the locking pin 32 extends out of the upper end part of the limit groove 211 of the connecting pin 21 to enter a full locking state, so that the smoke guide plate 2 is installed in place, and meanwhile, the smoke guide plate 2 can be kept suspended in a space below the smoke collecting hood 1;

when the smoke guide plate 2 is detached, the connecting feet 21 on the left and right sides of the front side part of the smoke guide plate 2 are pushed upwards into the opening of the lock seat 31 in the locking device 3 of the smoke collecting hood 1, the sliding block 33 is pushed away from the step 313 again to enter an unlocking state, the connecting feet 21 on the left and right sides of the front side part of the smoke guide plate 2 are separated from the locking device 3, then the smoke guide plate 2 is pulled upwards, and the clamping hooks 22 on the front side part of the smoke guide plate 2 are separated from the clamping parts 11 of the smoke collecting hood 1, so that the disassembly is completed.

The second embodiment is shown in fig. 9-15, which is different from the first embodiment in that the pin is cross-shaped, and the transmission mechanism is not the sliding block 33, the push rod 4, the rotary rod 5, the driving gear 6 and the driven gear 7 meshed with each other in the first embodiment, but is in a gas transmission mode, specifically, the locking mechanism 3' comprises a lock seat 31', a cross-shaped lock pin 32' and the transmission mechanism which are arranged in the lock seat 31', the bottom of the lock seat 31' is provided with a vertical guide hole 311' for the connecting pin 21' to enter and slide, and the connecting pin 21' enters the guide hole 311' can trigger the transmission mechanism and drive the lock pin 32' to extend or retract relative to the guide hole 311 '. Wherein, the inner side wall of the lock seat 31 'is provided with a guide groove 312' for the lock pin 32 'to slide transversely, two ends of the guide groove 312' are opened and communicated with the guide hole 311', the lock pin 32' is connected with a first elastic member 321', preferably two tension springs, which are respectively arranged at the upper end and the lower end of the vertical arm of the lock pin 32', one end of each tension spring is connected on the inner side wall of the lock seat 31', and the other end is connected with the side wall of the vertical arm of the lock pin 32', so that the lock pin 32 'always has a trend of keeping away from the guide hole 311'. The transverse arm of the lock pin 32 'can extend into the guide hole 311', in order to enable the lock pin 32 'to be kept in a locking state finally in the transverse sliding process, the side wall of the vertical arm of the lock pin 32' is provided with a guide groove 4', a limiting piece 5' with the transverse dimension smaller than the width of the guide groove 4 'is arranged in the guide groove 4', the head of the lock pin 32 'is kept in a state of extending out of the guide hole 311' by biasing the limiting piece 5 'on the first side of the guide groove 4' adjacent to the guide hole 311', the limiting piece 5' comprises a convex column 51 'and a fixing seat 52' for fixing the convex column 51', the inner side wall of the lock seat 31' is provided with a limiting rail 6 'for sliding the head of the convex column 51' below the guide groove 312', the limiting rail 6' is approximately triangular, and comprises a first chute 61 'with the transverse dimension smaller than the width of the guide groove 311', a second chute 62 'with the transverse dimension from bottom to the top, and a third chute 63' connecting the first chute 61 'and the second chute 62', and a third chute 63', the middle part 63' with the first chute 63 'and the third chute 63' are positioned at the bottom to form a first chute 63 'and a lower part and a third chute 63' with the initial position at the bottom to be located at the bottom of the third chute 5 'and a lower than the bottom at the bottom side and at the bottom of the third chute 63' is located at the bottom; in the state that the transmission mechanism drives the lock pin 32' to extend outwards relative to the gradually guiding hole 311', the limiting piece 5' can slide along the first chute 61' and the second chute 62 '; the lock pin 32' can be held to extend out of the guide hole 311' in a state where the stopper 5' again enters the third inclined groove 63' and is retained in the catching portion 64 '. And, the guide groove 4' is internally provided with a second elastic piece 41 so that the limiting piece 5' always has a downward reset trend, the second elastic piece 41' is a compression spring, one end of the second elastic piece is propped against the limiting piece 5', and the other end is propped against the top side wall of the guide groove 4 '.

The transmission mechanism comprises a first elastic pressing head 7', a second elastic pressing head 8' and an air guide pipe 9 'for connecting the first elastic pressing head 7' and the second elastic pressing head 8', wherein the first elastic pressing head 7' is arranged at a position which can be touched by a connecting pin 21 'entering the guide hole 311', the second elastic pressing head 8 'is arranged at a position which can be propped against one side of the lock pin 32' far away from the guide hole 311', and when the connecting pin 21' enters the guide hole 311', air flows in the inner cavity of the air guide pipe 9' by pressing and touching the first elastic pressing head 7', and then the second elastic pressing head 8' is driven to apply pushing force to the lock pin 32', so that the lock pin 32' is driven to transversely move, and the head of the lock pin 32 'extends out through the guide hole 311'. In a state that the connecting pin 21 'enters the guide hole 311' and presses the first elastic pressing head 7', gas can flow in the inner cavity of the gas guide pipe 9', and the flowing gas drives the second elastic pressing head 8 'to apply pushing force to the lock pin 32'. In addition, the connecting leg 21' is provided with a limiting groove 211' on the side wall for the locking pin 32' to extend or retract outwards, and the length of the limiting groove 211' is greater than that of the locking pin 32 '. Thus, when the limiting piece 5' slides along the first chute 61' and the second chute 62', the locking pin 32' only stretches into the middle part or the bottom of the limiting groove 211' of the locking pin 32' in the process of gradually extending the locking pin 32' to the guide hole 311', and is not completely locked at this time, and when the limiting piece 5' reenters the third chute 63' and is limited in the clamping part 64', the position of the locking pin 32' relative to the connecting pin 21' is lower, the connecting pin 21' can move downwards relative to the locking pin 32', the locking pin 32' can abut against the upper end part of the limiting groove 211' of the locking pin 32', and the smoke guide plate 2' can be hung below the smoke collecting cover 1' when locked relative to the smoke collecting cover 1', so that the full locking state is realized.

The third embodiment is shown in fig. 16-22, which is different from the first embodiment in that the transmission mechanism is triggered by the connecting pin, but the transmission mechanism is also not the sliding block 33, the push rod 4, the rotating rod 5, the driving gear 6 and the driven gear 7 meshed with each other in the first embodiment, specifically, the locking device comprises a lock seat 31", a lock pin 32″ arranged in the lock seat 31", the transmission mechanism and the trigger piece, the bottom of the lock seat 31 "is provided with a vertical guide hole 311" for the connecting pin 21 "to enter, the input end of the transmission mechanism is connected with a rotating shaft 6", the trigger piece is mounted on the rotating shaft 6", the connecting pin 21" enters the vertical guide hole 311 "to drive the trigger piece to rotate relative to the rotating shaft 6", the transmission mechanism can be triggered and drive the lock pin 32 "to transversely extend or retract, and the connecting pin 21" is provided with a limit groove 211 "for the lock pin 32" to extend outwards or retract inwards on the side wall, and the length of the limit groove 211 "is longer than the length of the lock pin 32". In this embodiment, the touching member includes a push block 4 "and a push rod 5", the lock seat 31 "is provided with a pin shaft for hinging the head of the push block 4", the end of the push block 4 "is hinged at the end of the push rod 5" through a shaft parallel to the pin shaft, the head of the push rod 5 "is hinged on the rotating shaft 6", the middle part of the push block 4 "is connected with a first elastic member 41", preferably a tension spring, one end of the first elastic member 41 "is connected on the inner side wall of the lock seat 31", and the other end is connected with the middle part of the push block 4", so that the push block 4" always has a tendency of pulling the push rod 5 "downwards. The transmission mechanism comprises a connecting rod 7' and a cam 8', wherein the connecting rod 7' is coaxially arranged with the rotating shaft 6' and can coaxially rotate with the rotating shaft 6', the root of the connecting rod 7 "is connected to the rotating shaft 6", and the lock pin 32 "is matched with the side wall of the cam 8".

Wherein, the head of the connecting rod 7 "expands into a connecting seat 71" which is basically circular, a connecting shaft which is parallel to the rotating shaft 6 "at the central part of the connecting seat 71" is connected with the cam 8", a plurality of embedded grooves 711" which are distributed in a circumferential shape and have right-angled triangles in cross section are arranged on the inner side wall of the connecting seat 71 ", the inclined surface of each embedded groove 711" rotates towards one direction, a groove 81 "is formed by downwards recessing the outer side wall of the cam 8", a lug 9 "which is also right-angled triangles in cross section is connected in the groove 81", a second elastic piece, preferably a compression spring, is connected at the root of the lug 9", and the compression spring ensures that the head of the lug 9" always has a trend of exposing the outer side wall of the cam 8", so that the connecting rod 7" can drive the lock pin 32 "to extend or retract by forcing the head of the lug 9". And, a containing cavity 30 "for containing the connecting rod 7" and the cam 8 "is formed in the lock seat 31" at one side of the vertical guiding hole 311", a slide way 312" is formed on the side wall of the lock seat 31", two ends of the slide way 312" are opened and are communicated with the containing cavity 30 "and the vertical guiding hole 311", and a lock pin 32 "is arranged in the slide way 312". The side wall of the lock pin 32 "is provided with a guide groove 321", a third elastic member 323 "is arranged in the guide groove 321", so that the lock pin 32 "always has a trend of returning to the cavity 30", the third elastic member 323 "is a compression spring, the compression spring is embedded in the guide groove 321", one end of the compression spring abuts against the inner side wall of the lock seat 31", the other end abuts against the bottom of the guide groove 321", and the cavity 30 "is rotationally connected with a shifting sheet 10" capable of limiting the rotation direction of the cam 8 ". In this embodiment, to better control the cam 8 "to rotate a certain angle, the lock pin 32" can just extend into or retract into the limit groove 211 "of the connecting pin 21", and the cam 8 "is designed to be similar to a plum blossom shape.

The process of locking and unlocking the connection pin 21″ is specifically as follows:

in the initial state, the connecting pin 21 'is to be extended into the vertical guide hole 311', the push block 4 'and the push rod 5' do not touch the connecting rod 7 'and the cam 8' of the transmission mechanism, the lock pin 32 'is retracted in the limit groove 211';

in the half-locking state, the connecting pin 21' stretches into the vertical guide hole 311' to push the push block 4' to rotate upwards and the push rod 5' to move backwards, the push rod 5' drives the connecting rod 7' and the cam 8' to rotate forward from front to back, the lock pin 32' is ejected outwards by the cam 8', the outer part extends into the limit groove 211' or the lower end part of the limit groove 211 ';

in the fully locked state, under the action of the restoring force of the first elastic piece 41", the push block 4 pulls the push rod 5" to pull downwards and fall back to the initial position again, the connecting rod 7 "and the cam 8" are driven by the push rod 5 "and the push block 4" to rotate forwards, and since the cam 8 "cannot rotate under the action of the pulling piece 10", the connecting rod 7 "can only rotate forwards from back to back, at the moment, the groove 81" of the connecting rod 7 "can press the second elastic piece to shrink inwards, and the convex block 9" can slide into the adjacent groove 81 ", so that the fully locked state that the lock pin 32" extends out of the upper end part of the limiting groove 211 "is realized; because the length of the limit groove 211 "is greater than that of the lock pin 32", when the lock pin 32 "extends out of the upper end of the limit groove 211", the smoke guide plate 2 can be hung in the space below the smoke collecting hood 1", and at this time, the third elastic member 323" in the lock pin 32 "is in a stretched state;

in the unlocking state, when the connecting pin 21 "pushes the push block 4" to rotate upwards again, the push rod 5 "moves backwards, the push rod 5" drives the connecting rod 7 "and the cam 8" to rotate forwards and backwards, the lock pin 32 "is pushed by the cam 8" again, and the lock pin 32 "extending out of the inner upper end part of the limit groove 211" is pulled back into the containing cavity 30 "again under the action of the elastic restoring force of the third elastic piece 323" so as to realize unlocking retracted in the limit groove 211 ".

The fourth embodiment is shown in fig. 23 to 30, which is different from the second embodiment in that the transmission mechanism is directly triggered by the connection pin, and the transmission mechanism includes a first transmission mechanism 4' and a second transmission mechanism 5' capable of converting upward power when the connection pin 21' enters the guide hole 313' into inward and outward contraction of the lock pin with respect to the limit groove 211 '. Specifically, the locking mechanism 3' includes a lock seat 31', a linear lock pin arranged in the lock seat 31' and a transmission mechanism, the bottom of the lock seat 31' has a vertical guiding hole 313' for the connection pin 21' to enter and slide, the connection pin 21' has a limit slot 211' on the side wall into which the lock pin can be inserted when extending, and the connection pin 21' enters the vertical guiding hole 313' to trigger the transmission mechanism and drive the lock pin to extend or retract relative to the guiding hole 313 '. The transmission mechanism comprises a first transmission mechanism 4' and a second transmission mechanism 5', wherein the first transmission mechanism 4' and the second transmission mechanism 5' can convert upward power generated when the connecting pin 21' enters the guide hole 313' into the locking pin which is contracted inwards and outwards relative to the limiting groove 211 '. The first transmission mechanism 4' comprises a first elastic pressing head 41', a second elastic pressing head 42' and an air duct 43' for connecting the first elastic pressing head 41' and the second elastic pressing head 42', wherein the first elastic pressing head 41' is arranged at a position which can be touched by the connecting pin 21' entering the guide hole 313', and the second elastic pressing head 42' is arranged at a position which can be touched by the second transmission mechanism 5'. The second transmission mechanism 5' comprises: a guide cylinder 51 'having a cylinder body with a downward opening, the top of which is fitted with a second elastic pressing head 42', and the inner side wall of the guide cylinder 51 'is provided with two rollers 511' symmetrically arranged, and the outer side wall of the guide cylinder 51 'is circumferentially spaced with racks 512'; the guide post 52' is fitted in the cylinder, the outer side wall of the guide post 52' is provided with a wave-shaped limit rail 521' for sliding the roller 511', and in addition, the guide post also comprises a gear 54' meshed with the rack 512', and the top of the gear 54' is provided with a lock pin; in a state that the roller 511' slides relative to the limit rail 521', the guide cylinder 51' can rotate relative to the guide post 52', so that the lock pin can extend or retract along with the rotation of the gear 54', the pin shaft comprises a first pin shaft 55' and a second pin shaft 56' which are hinged with each other, the first pin shaft 55' is eccentrically arranged on the gear 54', and the second pin shaft 56' can retract relative to the limit groove 211 '.

At the same time, there is also an elastic limiting member 57 'disposed adjacent to the gear 54', the elastic limiting member 57 'has a tendency to always keep abutting against the teeth of the gear 54', preferably, the section of the elastic limiting member 57 'is V-shaped, including a first elastic leg 571' and a second elastic leg 572', the length of the first elastic leg 571' is greater than that of the second elastic leg 572', the first elastic leg 571' is further extended with a first clamping leg 5711 'bent outwards, the second elastic leg 572' is further extended with a second clamping leg 5721 'bent outwards, accordingly, the lock seat 31' includes a first accommodating groove 311 'accommodating the guide cylinder 51' and the guide post 52', and a second accommodating groove 312' accommodating the gear 54 'and the pin shaft, and the side wall of the second accommodating groove 312' is adjacent to the elastic limiting member 57 'and provided with a first clamping groove 5712' accommodating the first clamping leg 5711 'and a second clamping groove 5722' accommodating the second clamping leg 5721', so that the first leg 571' can rotate along the first elastic leg 571 'along the first elastic leg 572' direction. In order to drive the pin shaft to be inserted into or in the limit groove 211' during the rotation of the gear 54', the pin shaft comprises a first pin shaft 55' and a second pin shaft 56' which are hinged with each other and are eccentrically arranged on the gear 54 '.

Specifically, the locking and unlocking states of the connection pin 21' with respect to the lock pin are as follows:

in the initial state, the connecting pin 21 'is to extend into the vertical guide hole 313', the first transmission mechanism 4 'and the second transmission mechanism 5' are not touched, the lock pin is retracted in the limit groove 211', and at this time, the two rollers 511' arranged on the inner side wall of the guide cylinder 51 'are positioned at the position of the first crest of the limit rail 521';

in the locked state, the connecting pin 21' pushes up to push the first elastic compression head to compress, so as to push the second elastic compression head to stretch, push the guide cylinder 51' to move downwards, and in the downward moving process, the roller 511' moves from the position of the first crest 10' to the first trough 20' to the second crest 30' in the track and drives the guide cylinder 51' to rotate by a certain angle, and the guide cylinder 51' drives the gear 54' to rotate (the transmission ratio of the rack 512' on the outer surface to the gear 54' is 2:1, and drives the first pin shaft 55' and the second pin shaft 56' on the gear 54' to move, so that the second pin shaft 56' stretches out to form the locked state).

In the unlocking state, the connecting pin 21' presses upwards again and touches the first elastic pressing head 41' to enable air to flow in the inner cavity of the air duct 43', then the second elastic pressing head 42' continues to press downwards to drive the roller 511' to slide away from the vertical guide hole 313' relative to the limit rail 521', and the gear 54' rotates unidirectionally due to the elastic limiting piece 57', so that the roller 511' is limited to slide from the second crest 30' to the second trough 40' only, and then returns to the first crest again, and the head of the second pin shaft 56' is separated to unlock.

31-39, the fifth embodiment differs from the fourth embodiment in that the sliding in the transverse guide groove is a locking groove instead of a locking pin, the locking groove has a concave portion 321", the connecting leg 21" has a male limit leg which can be embedded in the concave portion, and the transmission mechanism is gas transmission; the end of the transverse arm of the locking groove 32 "is a head part which can pass through the guide hole 311" and has a U-shaped section, the head end of the transverse arm of the locking groove 32 "is connected with a gear 322" and a guide block 323 which is sleeved outside the gear 322 "and can rotate relative to the guide groove 312", the guide block 323 "is provided with a central hole for the gear 322" to rotate inside, and the side wall of the central hole is also provided with an elastic clamping piece 4 which limits the gear 322 "to rotate only in one direction.

Specifically, the locking mechanism 3 includes a lock seat 31", a linear locking slot 32" and a transmission mechanism, wherein the linear locking slot 32 "is disposed in the lock seat 31", a vertical guiding hole 311 "is disposed at the bottom of the lock seat 31" for the connection leg 21 "to enter and slide, a limit leg 211" is disposed on the side wall of the connection leg 21 "for the connection leg 32" to be inserted when the locking slot 32 "extends outwards, and the connection leg 21" enters the guiding hole 311 "to trigger the transmission mechanism and drive the locking slot 32" to extend outwards or retract inwards relative to the guiding hole 311 ". Wherein, the inner side wall of the lock seat 31' is provided with a guide groove 312' for the lock groove 32' to slide transversely, two ends of the guide groove 312' are opened and communicated with the guide hole 311', the lock groove 32' is connected with a first elastic piece 321', preferably a compression spring, one end of the compression spring is connected on the inner side wall of the lock seat 31', the other end is connected with the side wall of the lock groove 32', in this embodiment, the locking groove 32 "is in a straight line shape, the end of the transverse arm of the locking groove 32" is a head capable of passing through the guiding hole 311", the cross section of the head is in a U shape, the head end of the transverse arm of the locking groove 32" is connected with the gear 322 "and the guiding block 323" which is sleeved outside the gear 322 "and can rotate relative to the guiding groove 312", the guiding block 323 "has a central hole for the gear 322" to rotate inside, in addition, the side wall of the central hole is further provided with an elastic clamping piece 4 "which limits the gear 322" to rotate only in one direction, the cross section of the elastic clamping piece 4 "is in a V shape, the elastic clamping piece comprises a first elastic leg 41" and a second elastic leg 42", the length of the first elastic leg 41" is greater than that of the second elastic leg 42", the first elastic leg 41" further extends outwards to form a first clamping leg 411 "which is bent outwards, the second elastic leg 42" further extends outwards to form a second clamping leg 412 "which is bent outwards, and accordingly a containing groove 3231" for containing the elastic clamping piece 4 "is formed in the guide block 323", and the length of the first elastic leg 41 "is greater than that of the second elastic leg 42", so that the gear 322 "can rotate in one direction along the guide groove 312".

The middle part of the locking groove 32 "is at least partially provided with a through hole 324", the bottom of the head end of the transverse arm is provided with a first convex column 5 "and a second convex column 6" which are oppositely arranged, the outer surfaces of the first convex column 5 "and the second convex column 6" are provided with rollers 7 "with the through holes 324" exposed, correspondingly, the middle part of the inner side wall of the guiding groove 312 "corresponding to the locking groove 32" is provided with a substantially wavy limit rail 8 "for sliding of the rollers 7", and in a state that the rollers 7 "slide relative to the limit rail 8", the gears 322 "of the locking groove 32" can rotate relative to the guiding blocks 323", so that the rotation of the head of the locking groove 32" is realized. The transmission mechanism comprises a first elastic pressing head 9', a second elastic pressing head 10', and an air duct 20 'for connecting the two, wherein the first elastic pressing head 9 "is arranged at a position which can be touched by the connecting pin 21" entering the guide hole 311", the second elastic pressing head 10" is provided at a position capable of abutting against the side of the lock groove 32 "away from the guide hole 311", in the state that the connecting pin 21' enters the guide hole 311', the first elastic pressing head 9' is pressed and touched, so that gas flows in the inner cavity of the gas guide tube 20', and then the second elastic pressing head 10' is driven to apply pushing force to the locking groove 32', and the locking groove 32' is driven to transversely move, so that the head of the locking groove 32 'extends outwards through the guide hole 311'.

Specifically, the locking and unlocking states of the connection pin 21″ with respect to the locking groove are as follows:

in the initial state, the limit leg 211 'of the connecting leg 21' is ready to extend into the vertical guide hole, the hollow part of the U-shaped head part at the tail end of the transverse arm of the locking groove faces the vertical guide hole, the transmission mechanism is not touched, the locking groove is retracted in the limit groove, and at the moment, the rollers 7 'on the first convex column 5' and the second convex column 6 'arranged at the bottom of the head end of the transverse arm are positioned at the first trough of the limit track 8';

in the locking state, the connecting pin 21 'stretches into the vertical guide hole to extrude the first elastic pressing head 9', so that gas flows in the inner cavity of the gas guide tube 20', and then the second elastic pressing head 10' is driven to apply pushing force to the locking groove 32', so that the roller 7' on the first convex column 5 'and the second convex column 6' arranged at the bottom of the head end of the transverse arm can slide along the wavy limit track 8', the gear 322' of the locking groove 32 'can rotate relative to the guide block 323' in the state that the roller 7 'slides relative to the limit track 8' towards the direction close to the vertical guide hole, the rotation of the head of the locking groove 32 'is realized, the roller 7' slides to the first wave crest and the second wave crest from the first wave crest of the limit track 8', the vertical wall of the U-shaped head can just rotate to face the vertical guide hole when the roller 7' is positioned at the second wave crest, and the limit pin 211 'of the connecting pin 21' is inserted on the vertical wall of the U-shaped head to realize locking;

in the unlocking state, the connecting pin extrudes upwards again and touches the first elastic pressing head 9 "to enable gas to flow in the inner cavity of the gas guide tube 20", the free end of the elastic clamping piece 4 "always keeps the trend of abutting on the gear teeth, so that the roller 7" can only continue sliding from the second trough to the second crest, then returns to the first trough again, and then the second elastic pressing head 10 "drives the roller 7" to slide relative to the limit rail 8 "in the direction away from the vertical guide hole under the elastic restoring force of the first elastic piece 321", the hollow part of the U-shaped head rotates to face the vertical guide hole again, and the limit pin 211 "of the connecting pin 21" is separated from the head of the locking groove to realize unlocking.

Claims

1. A range hood, comprising:

a fume collecting hood having an air inlet;

it is characterized in that the method also comprises the following steps:

the connecting pin can directly or indirectly trigger the locking device under the action of moving towards the direction approaching to the fume collecting hood so as to switch the relative locking or unlocking state of the connecting pin; the smoke guide plate is rotatably connected to the rear part of the smoke collecting hood at the rear part of the smoke guide plate, so that the front side part of the smoke guide plate can vertically overturn relative to the smoke collecting hood, and the connecting feet are arranged at the left side and the right side of the front side part of the smoke guide plate; the locking device comprises:

the transmission mechanism is arranged in the lock seat and can drive the sliding piece to slide in the transverse guide groove under the triggering of the connecting pin inserted into the vertical guide hole; the sliding piece transversely stretches or contracts inwards relative to the vertical guide hole, so that the connecting pin is locked or unlocked relatively; the transmission mechanism can convert upward power when the connecting pin enters the guide hole into transverse movement of the sliding piece; the sliding piece is a lock pin with an outer convex part and capable of inserting the outer convex part into a corresponding concave limiting groove on the connecting pin or a lock groove with a concave part and capable of accommodating the corresponding convex limiting pin on the connecting pin to be inserted into the concave part; the lock pin is provided with an outer protruding part, and is provided with a concave limiting groove corresponding to the outer protruding part of the lock pin, and the lock pin can be driven to slide in the transverse guide groove under the triggering of the connecting pin inserted into the vertical guide hole, so that the lock pin transversely extends or contracts inwards relative to the vertical guide hole; in the outward extending state of the lock pin, the inward concave limiting groove of the connecting pin can accommodate the outer convex part of the lock pin to be embedded in the limiting groove; the locking groove is provided with a concave part, the side wall of the connecting pin is provided with a corresponding convex limiting pin corresponding to the concave part of the locking groove, and the locking groove can be driven to slide in the transverse guide groove under the triggering of the connecting pin inserted into the vertical guide hole, so that the locking groove transversely extends or contracts inwards relative to the vertical guide hole; and in the outward extending state of the locking groove, the concave part of the locking groove can accommodate the convex limit pin of the connecting pin to be embedded therein.

2. The range hood of claim 1, wherein: the lock seat also comprises a touch piece, and the connecting pin enters the vertical guide hole and can indirectly trigger the transmission mechanism to drive the sliding piece to slide under the action of touching the touch piece.