CN208280871U - Buffer-type door leaf finger pinch device - Google Patents
Buffer-type door leaf finger pinch device Download PDFInfo
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- CN208280871U CN208280871U CN201820890663.9U CN201820890663U CN208280871U CN 208280871 U CN208280871 U CN 208280871U CN 201820890663 U CN201820890663 U CN 201820890663U CN 208280871 U CN208280871 U CN 208280871U
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Abstract
The utility model relates to a kind of buffer-type door leaf finger pinch devices.Often there is a situation where hands in daily life is crushed by door leaf, causes serious harm.The buffer-type inflator component and inflator fixing seat, cooperation auxiliary fixing seat or cooperation inclined-plane block, subsidiary positioning bases composition that the utility model is automatically adjusted by the resistance to compression pression of a locking locking apparatus with compression speed.The utility model structure is simple, easy to use, is useful on all kinds of open-close types and translation door.The drag size of buffer-type door leaf finger pinch device can be automatically adjusted according to the closing speed of door leaf.When the speed that door leaf is closed is smaller, the resistance of buffer-type door leaf finger pinch device is also smaller, can easily close door.It is larger in the speed that door leaf is closed, when being likely to cause clamp hand accident, it is automatically increased the resistance of buffer-type door leaf finger pinch device, directly stops door leaf to be closed so that the closing speed for reducing door leaf at closing time even passes through locking system, the fortuitous event of door leaf clamp hand is effectively prevent to occur.
Description
Technical field
The utility model relates to a kind of door leaf finger pinch devices.In particular to one kind is fixedly installed on door leaf or doorframe and uses
With the mechanical device for preventing door leaf clamp hand accident from occurring.
Background technique
Often there is a situation where hands in daily life is crushed by door leaf.Light then broken skin of bleeding, it is heavy then injure bone, it causes
Serious damage.
At present on the market for preventing the product of door leaf clamp hand, there are two main classes: one kind is using flexible materials such as sponges
The products such as the gear badge, the blocking door plug that are made into, this kind of product is many kinds of on the market, different, and can play prevents door leaf
The effect of clamp hand.But this kind of product is all that independent product is separated with door, when enabling, will be loaded at once, must will produce at closing time
Product, which are taken off, separately to be placed, and is used very inconvenient.And not can guarantee open the door every time after all remember to load onto gear badge or
Stop door plug to lose the effect of finger.While it also being easily caused that must take off separately to place by product at closing time
The loss kept off badge, stop door plug.Another kind of is finger protection strip for door crevice, and type is also more in the market for this kind of product,
Basic principle is all similar, is all to be fixedly installed in door-hinge side, but can only prevent the clamp hand accident of the crack between a door and its frame of door-hinge side this side from occurring,
The clamp hand accident of more frequent door lock side is occurred with regard to helpless to accident.
Summary of the invention
The purpose of the utility model is to overcome existing finger products to install and use upper deficiency, provides a kind of buffering
Type door leaf finger pinch device reduces the accident that hand is crushed by door leaf and occurs.
In order to solve the above-mentioned technical problem, the utility model is achieved through the following technical solutions:
The buffer-type inflator group that the utility model is automatically adjusted by the resistance to compression pression of a locking locking apparatus with compression speed
Part 2-2 and inflator fixing seat 2-1 cooperates auxiliary fixing seat 2-3 or cooperation inclined-plane block 2-5, subsidiary positioning bases 2-4 composition.
The buffer-type inflator component 2-2 includes the main piston mandril 38 that can be moved up and down, on main piston mandril 38
Portion is provided with the bearing axis 2 of bearing 1 and fixing bearing, and bearing 1 projects slightly from the upper limb of main piston mandril 38；Main air cylinder casing
12 are set in outside main piston mandril 38, and the lower piston of main piston mandril 38 can transport up and down along the inner wall of main air cylinder casing 12
Dynamic, main piston mandril 38 is reached outside main air cylinder casing 12 by main air cylinder casing upper opening 30；The unidirectional work of one-way ventilating
Plug sealing ring 28 is set in the lower recess 11 of main piston mandril 38, the airtight fixation of lower elastic with main piston mandril 38,
One-way piston sealing ring 28 moves up and down with main piston mandril 38, constitutes an one-way piston；One-way piston sealing ring 28
Outer wall and main air cylinder casing 12 inner wall Elastic Contact, play the role of unidirectional closed air；Reset spring 27 is placed in master
Inside air cylinder casing 12, the both ends of reset spring 27 be stuck in main piston mandril 38 bottom and elasticity ventilation diaphragm 25 it
Between；Elasticity ventilation diaphragm 25 is stuck between main 12 lower thread step 20 of air cylinder casing and ventilation fixing seat 23；Main air cylinder casing
12 are threadedly engaged air-tight connection by main inflator sealing ring 22 with ventilation fixing seat 23；The centre of elasticity ventilation diaphragm 25 has one
Bleeder port 13 is uniformly placed with big venthole 24 around bleeder port 13, and the diameter of big venthole 24 is about 3 millimeters；Ventilation is fixed
The center of seat 23 is provided with aeration regulation nut 17, and aeration regulation nut 17 is solid by aeration regulation sealing ring 16 and ventilation
Reservation 23 is threadedly engaged air-tight connection；The middle section of the lower surface 19 of elasticity ventilation diaphragm and the upper end of aeration regulation nut 17
There are 0.2 millimeter to 1.5 millimeters of main airspaces 18 between face 14, rotate the adjustable main ventilation of aeration regulation nut 17
The size in gap 18；17 center of aeration regulation nut is provided with hexagon ventilation through-hole 15, can be revolved by allen wrench
Turn aeration regulation nut 17, to adjust the size of main airspace 18；Big venthole 24 and main airspace 18 and ventilation are logical
Hole 15 forms big venting channels；Stop sleeve 7 is located at the bosom position of main piston mandril 38, passes through sunk screw 9 and master
Piston mandril 38 is fixedly connected；The locking that locking swings piece 36 swings disk rotating shaft 37 and is fixed by the through-hole on stop sleeve 7
In the top of stop sleeve 7；The top for swinging piece fork arm 5 is fixed with fork arm pin 4, and fork arm pin 4 is located at locking again and swings piece
Inside 36 swing sliding slot 3, moving up and down swing piece fork arm 5 can make locking swing piece 36 generate corresponding swing；Locking pendulum
A part of movable plate 36 is located in the upper tine pike pole slot 35 for swinging piece fork arm 5, can slide in fork arm fork pockets 35；Swing piece
Fork arm 5 is in the positioning through hole 6 of stop sleeve 7, can be slided up and down along positioning through hole 6；Swing the lower part setting of piece fork arm 5
There is internal screw thread, is cooperatively connected with the upper external thread of the second piston mandril 8 of second piston 10, second level can be adjusted by the thread
Piston mandril 8 and the total length for swinging piece fork arm 5；Second piston sealing ring 29 is sleeved on the groove of second piston 10, with two
The grade airtight fixation of piston 10, moves together with second piston 10；The inner wall bullet of second piston sealing ring 29 and main piston mandril 38
Property contact, play the role of closed air；Second level reset spring 31 is located at the inside of main piston mandril 38, second level reset spring 31
Both ends be stuck between the bottom of stop sleeve 7 and second piston 10；Locking is corresponded on stop sleeve 7 swings piece 36
The position for swinging piece lock tongue 33 is provided with sleeve lock tongue opening 34, and branch can be stretched out by sleeve lock tongue opening 34 by swinging piece lock tongue 33
Outside support set cylinder 7；The position that the swing piece lock tongue 33 that locking swings piece 36 is corresponded on main piston mandril 38 is provided with main piston top
Lever lock tongue opening 32, swinging piece lock tongue 33 can be open outside 32 stretching main piston mandrils by main piston mandril lock tongue.
The inflator fixing seat 2-1 is set in the bottom of the main air cylinder casing 12 of buffer-type inflator component 2-2, prevents from delaying
Stamp inflator component 2-2 is moved down, and the bottom of inflator fixing seat 2-1 is provided with through-hole, for ventilating and tool being easy to use to revolve
Turn aeration regulation nut 17.Buffer-type inflator component 2-2 can be in inflator fixing seat 2-1 along buffer-type inflator component 2-2's
Axial rotation, to select the rotating direction of most suitable bearing 1.
The auxiliary fixing seat 2-3 is set in the top of the main air cylinder casing 12 of buffer-type inflator component 2-2, with buffering
12 tight fit of main air cylinder casing of type inflator component 2-2 plays the role of fixing and supporting buffer-type inflator component 2-2.
The subsidiary positioning bases 2-4 is set in the outside of the main piston mandril 38 of buffer-type inflator component 2-2, with buffering
38 loose fit of main piston mandril of type inflator component 2-2 is played the role of positioning main piston mandril 38, and main piston mandril 38 can be with
Axially free in the through-hole of subsidiary positioning bases 2-4 to slide up and down, the through-hole of subsidiary positioning bases 2-4 is provided with recessing groove 2- on one side
6, stretching can be allowed to swing piece lock tongue 33 and passed freely through, subsidiary positioning bases 2-4 will not stop to swing piece lock tongue 33.
The inclined-plane block 2-5 is installed on the axial surface of main piston mandril 38 of buffer-type inflator component 2-2.
The utility model can selectively use auxiliary fixing seat 2-3, auxiliary fixed when implementing according to actual use occasion
One or both of position seat 2-4, inclined-plane block 2-5, not will all use.
The utility model has the beneficial effects that structure is simple, and it is easy to use, it is applicable on all kinds of open-close types and translation door.Its
Bigger beneficial effect is can pointedly to adjust buffer-type door leaf finger pinch device automatically according to the closing speed of door leaf
Drag size, to prevent the generation of door leaf clamp hand accident.It is such as smaller in the speed of door leaf closing, it will not be caused hand folding
When injury, the resistance of buffer-type door leaf finger pinch device is also smaller, can easily close door；Door leaf close speed compared with
Greatly, it is possible to which when causing clamp hand accident, buffer-type door leaf finger pinch device is automatically increased the resistance of door leaf closing, to reduce pass
The closing speed of door leaf when door；When the speed that door leaf is closed is especially big, buffer-type door leaf finger pinch device then can directly stop
The closure of door leaf effectively prevent the fortuitous event for door leaf clamp hand occur to occur.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model, does not include subsidiary positioning bases and inclined-plane block, the buffering in figure in figure
Type inflator component is in reset state.
Fig. 2 is the structural representation top view of Fig. 1.
Fig. 3 is the structural representation bottom view of Fig. 1.
Fig. 4 is the structural schematic diagram of the vent portion of the buffer-type inflator component of the utility model, band elasticity ventilation diaphragm.
Fig. 5 is the structural schematic diagram of the vent portion of the buffer-type inflator component of the utility model, does not include elasticity ventilation
Diaphragm.
Fig. 6 is that the buffer-type inflator component of the utility model is in the structural representation cross-sectional view of lockup state, the bullet in figure
Property ventilation diaphragm and the upper end surface of aeration regulation nut be in compressive state, swing piece in being bonded air-tight state, second piston
Lock tongue is located at lock position, and 10. second pistons in figure, 17. aeration regulation nuts, 25. elasticity ventilation diaphragms, 33. swing mortice lock
Tongue.
Fig. 7 is that the buffer-type inflator component of the utility model is in the structural representation cross-sectional view of complete compressive state, in figure
Swing piece lock tongue be located at reset position, 33. swing piece lock tongues in figure.
Fig. 8 is that the main piston mandril of the buffer-type inflator component of the utility model is moved downward in low speed (1-3 cm/s)
When operation principle schematic diagram, the swing piece lock tongue in figure is in reset position.33. swinging piece lock tongue, 38. main piston mandrils.
Fig. 9 is that the main piston mandril of the buffer-type inflator component of the utility model is downward in medium speed's (3-5 cm/s)
Operation principle schematic diagram when movement, the elasticity ventilation diaphragm in figure deform downwards, and main airspace narrows, but elasticity is logical
Air film piece is not bonded closed with the upper surface of aeration regulation nut, and big venting channels ventilation capacity reduces but still keeps smooth
It is logical.The upper surface of 14. aeration regulation nuts in figure, 17. aeration regulation nuts, 18. main airspaces, 19. elastic air ventilation membranes
The lower surface of piece, 25. elasticity ventilation diaphragms, the big venting channels of 1-2..
Figure 10 is that the main piston mandril of the buffer-type inflator component of the utility model is transported downwards in high speed (5-50 cm/s)
Operation principle schematic diagram when dynamic, elasticity ventilation diaphragm in figure and the upper end surface of aeration regulation nut are in being bonded sealed shape
State, second piston are in compressive state, and big venting channels are closed.10. second piston in figure, 17. aeration regulation nuts, 25.
Elasticity ventilation diaphragm.
Figure 11 be the utility model buffer-type inflator component main piston mandril movement velocity and main piston mandril by
The resistance mapping table arrived, when the movement velocity of main piston mandril is greater than starting speed threshold, main piston mandril is subject to
Resistance increases sharply；Reducing in the movement velocity of main piston mandril, the air pressure of lower cavity 26 is less than when releasing stress thresholding,
The resistance that main piston mandril is subject to is reduced rapidly.
Figure 12 is the structural schematic diagram of the component combination of the utility model, 2-1. inflator fixing seat in figure, 2-2. buffer-type
Inflator component, 2-3. auxiliary fixing seat, 2-4. subsidiary positioning bases, the inclined-plane 2-5. block, the recessing groove of 2-6. subsidiary positioning bases.
Figure 13 is the structural representation cross-sectional view of the component combination of the utility model, 2-1. inflator fixing seat in figure, and 2-2. is slow
Stamp inflator component, 2-3. auxiliary fixing seat, 2-4. subsidiary positioning bases, the inclined-plane 2-5. block, the resigning of 2-6. subsidiary positioning bases
Slot.
Figure 14 is the structural schematic diagram of one embodiment of the utility model.
Figure 15 is the working state schematic representation that embodiment shown in Figure 14 of the utility model is in starting state.
Figure 16 is the working state schematic representation that embodiment shown in Figure 14 of the utility model is in lockup state.
Figure 17 is the structural schematic diagram of another embodiment of the utility model.
The partial enlargement structural representation of embodiment shown in Figure 17 of Figure 18 the utility model.
Figure 19 is the working state schematic representation that embodiment shown in Figure 17 of the utility model is in lockup state.
Figure 20 is the structural schematic diagram of the third embodiment of the utility model.
The partial enlargement structural representation of embodiment shown in Figure 17 of Figure 21 the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
As shown in figure 1 to figure 13, the utility model is adjusted by the resistance to compression pression of a locking locking apparatus with compression speed automatically
Buffer-type inflator component 2-2 and inflator fixing seat 2-1 the cooperation auxiliary fixing seat 2-3 or cooperation inclined-plane block 2-5, auxiliary of section
Positioning seat 2-4 composition.
As shown in Figure 1, buffer-type inflator component 2-2 includes the main piston mandril 38 that can be moved up and down, main piston mandril
38 tops are provided with the bearing axis 2 of bearing 1 and fixing bearing, and bearing 1 projects slightly from the upper limb of main piston mandril 38；Main inflator
Shell 12 is set in outside main piston mandril 38, and the lower piston of main piston mandril 38 can be along the inner wall of main air cylinder casing 12
Lower movement, main piston mandril 38 are reached outside main air cylinder casing 12 by main air cylinder casing upper opening 30；The list of one-way ventilating
It is airtight solid with the lower elastic of main piston mandril 38 in the lower recess 11 for being set in main piston mandril 38 to piston seal 28
Fixed, one-way piston sealing ring 28 moves up and down with main piston mandril 38, constitutes an one-way piston；One-way piston sealing ring
The inner wall Elastic Contact of 28 outer wall and main air cylinder casing 12 plays the role of unidirectional closed air；Reset spring 27 is placed in
Inside main air cylinder casing 12, the both ends of reset spring 27 be stuck in main piston mandril 38 bottom and elasticity ventilation diaphragm 25 it
Between；Elasticity ventilation diaphragm 25 is stuck between main 12 lower thread step 20 of air cylinder casing and ventilation fixing seat 23；Main air cylinder casing
12 are threadedly engaged air-tight connection by main inflator sealing ring 22 with ventilation fixing seat 23；The centre of elasticity ventilation diaphragm 25 has one
Bleeder port 13 is uniformly placed with big venthole 24 around bleeder port 13, and the diameter of big venthole 24 is about 3 millimeters；Ventilation is fixed
The center of seat 23 is provided with aeration regulation nut 17, and aeration regulation nut 17 is solid by aeration regulation sealing ring 16 and ventilation
Reservation 23 is threadedly engaged air-tight connection；The middle section of the lower surface 19 of elasticity ventilation diaphragm and the upper end of aeration regulation nut 17
There are 0.2 millimeter to 1.5 millimeters of main airspaces 18 between face 14, rotate the adjustable main ventilation of aeration regulation nut 17
The size in gap 18；17 center of aeration regulation nut is provided with hexagon ventilation through-hole 15, can be revolved by allen wrench
Turn aeration regulation nut 17, to adjust the size of main airspace 18；Big venthole 24 and main airspace 18 and ventilation are logical
Hole 15 forms big venting channels；Stop sleeve 7 is located at the bosom position of main piston mandril 38, passes through sunk screw 9 and master
Piston mandril 38 is fixedly connected；The locking that locking swings piece 36 swings disk rotating shaft 37 and is fixed by the through-hole on stop sleeve 7
In the top of stop sleeve 7；The top for swinging piece fork arm 5 is fixed with fork arm pin 4, and fork arm pin 4 is located at locking again and swings piece
Inside 36 swing sliding slot 3, moving up and down swing piece fork arm 5 can make locking swing piece 36 generate corresponding swing；Locking pendulum
A part of movable plate 36 is located in the upper tine pike pole slot 35 for swinging piece fork arm 5, can slide in fork arm fork pockets 35；Swing piece
Fork arm 5 is in the positioning through hole 6 of stop sleeve 7, can be slided up and down along positioning through hole 6；Swing the lower part setting of piece fork arm 5
There is internal screw thread, is cooperatively connected with the upper external thread of the second piston mandril 8 of second piston 10, second level can be adjusted by the thread
Piston mandril 8 and the total length for swinging piece fork arm 5；Second piston sealing ring 29 is sleeved on the groove of second piston 10, with two
The grade airtight fixation of piston 10, moves together with second piston 10；The inner wall bullet of second piston sealing ring 29 and main piston mandril 38
Property contact, play the role of closed air；Second level reset spring 31 is located at the inside of main piston mandril 38, second level reset spring 31
Both ends be stuck between the bottom of stop sleeve 7 and second piston 10；Locking is corresponded on stop sleeve 7 swings piece 36
The position for swinging piece lock tongue 33 is provided with sleeve lock tongue opening 34, and branch can be stretched out by sleeve lock tongue opening 34 by swinging piece lock tongue 33
Outside support set cylinder 7；The position that the swing piece lock tongue 33 that locking swings piece 36 is corresponded on main piston mandril 38 is provided with main piston top
Lever lock tongue opening 32, swinging piece lock tongue 33 can be open outside 32 stretching main piston mandrils by main piston mandril lock tongue.
Inflator fixing seat 2-1 is set in the bottom of the main air cylinder casing 12 of buffer-type inflator component 2-2, prevents buffer-type gas
Cartridge module 2-2 is moved down, and the bottom of inflator fixing seat 2-1 is provided with through-hole, for ventilating and being easy to use tool rotation ventilation
Adjusting nut 17.Buffer-type inflator component 2-2 can turn in inflator fixing seat 2-1 along the axial direction of buffer-type inflator component 2-2
It is dynamic, to select the rotating direction of most suitable bearing 1.
In the case where no external force, if buffer-type inflator component 2-2 is in compressive state, in reset spring
Under the action of 27, main piston mandril 38 and stop sleeve 7 are moved upwardly together, and one-way piston sealing ring 28 is in unidirectional logical at this time
Gaseity, air a part that at this moment 28 top of one-way piston sealing ring is gathered in main 12 internal cavities of air cylinder casing pass through main work
The gap for filling in the upper opening 30 of mandril 38 and main air cylinder casing 12 is discharged outside main air cylinder casing 12, and a part is unidirectional by what is opened
Piston seal 28 enters the lower cavity 26 of 28 lower part of one-way piston sealing ring；The air of main 12 outside of air cylinder casing passes through ventilation
Hexagon venthole 15 among adjusting nut 17 enters using the big venthole 24 and bleeder port 13 of elasticity ventilation diaphragm 25
Lower cavity 26 inside main air cylinder casing 12.This Airflow is unimpeded through channel, and air resistance to compression pression can be ignored, main piston top
Bar 38 finally utmostly stretches out outside main air cylinder casing 12 under the action of reset spring 27, completes to reset；Simultaneously because lower sky
Without air pressure inside chamber 26, second level reset spring 31 resets, and swings piece lock tongue 33 and retracts inside main piston mandril.After reset
State is as shown in Figure 1.
It completes after resetting, having external force on the bearing 1 of main piston mandril 38, along main piston mandril 38
Axial downward external force component, drives main piston mandril 38 to move downward, and one-way piston sealing ring 28 enters air-tight state.According to
The difference of movement velocity is divided into three kinds of situation descriptions:
1. as shown in figure 8, main piston mandril 38 moves downward, but the speed moved is slower, such as 1-3 cm/s.Main gas
The air of lower cavity 26 inside cylinder shell 12 is squeezed, and as the direction arrow 1-3 moves.The air being extruded is largely logical
It crosses and is discharged outside inflator shown in arrow 1-2 by the big venting channels that big venthole 24 and main airspace 18 are formed, minimum portion
Divide the air being extruded by being discharged outside inflator shown in arrow 1-1 by the bleed passage that bleeder port 13 is formed.Air at this time
Passing away is very unimpeded, lower 26 internal air pressure very little of cavity, the air resistance that main piston mandril 38 is subject to when moving downward
Power is smaller, only the bounce by reset spring 27, it is possible to easily move downward；Simultaneously as lower 26 inside of cavity is empty
Atmospheric pressure very little swings piece lock tongue 33 and is maintained inside main piston mandril 38.Finally under external force, main piston mandril 38 can
To move downward until buffer-type inflator component is in complete compressive state, as shown in Figure 7.
2. as shown in figure 9, main piston mandril 38 moves downward, but movement velocity is very fast, such as 3-5 cm/s.Outside main inflator
The air of lower cavity 26 inside shell 12 is comparatively fast squeezed, and as the direction arrow 1-3 moves.The air comparatively fast squeezed pushes
Elasticity ventilation diaphragm 25 deforms it slightly downwards, makes the middle section and aeration regulation of the lower surface 19 of elasticity ventilation diaphragm 25
Main airspace 18 between the upper surface 14 of nut 17 narrows, and makes shown in arrow 1-2 by between big venthole 24 and main ventilation
The big venting channels ventilation capacity that gap 18 is formed reduces but still remains unimpeded, and the air pressure of lower cavity 26 starts to become larger, main work
The resistance that plug mandril 38 moves downward also slightly increases；Although simultaneously as 26 internal air pressure of lower cavity increase but still it is insufficient
To push second piston 10 to generate enough movements, swings piece lock tongue 33 and remain inside main piston mandril 38.Finally outside
Under power effect, main piston mandril 38 can be moved downward until buffer-type inflator component is in complete compressive state, such as Fig. 7 institute
Show.
3. main piston mandril 38 moves downward as shown in Fig. 6 and Figure 10, but movement velocity when just beginning is very fast, such as 5-
50 cm/s.The air of lower cavity 26 inside main air cylinder casing 12 is strongly compressed, and such as the direction arrow 1-3 pushing elastic
Ventilation diaphragm 25, makes it become larger downwards, so that the middle section and aeration regulation of the lower surface 19 of elasticity ventilation diaphragm 25
Main airspace 18 between the upper surface 14 of nut 17 becomes narrower, makes to be formed by big venthole 24 and main airspace 18
Big venting channels exhaust capacity further decreases, while the speed air flow for flowing through main airspace 18 is accelerated.If main gas
The air compression speed of lower cavity 26 inside cylinder shell 12 is persistently greater than the speed of air discharge, then in the compression of lower cavity 26
The lower pressure of air and the quick air flow for flowing through main airspace 18 are formed under the double action of negative pressure, elasticity ventilation diaphragm
The middle section of 25 lower surface 19 is bonded with the upper surface 14 of aeration regulation nut 17, and big venting channels 18 are closed completely
It closes.Once big venting channels are closed, capacity reduces suddenly, in the item that the compression speed of the air of lower cavity 26 remains unchanged
Under part, the air pressure of lower cavity 26 is multiplied, further make elasticity ventilation diaphragm 25 lower surface 19 middle section with
The upper surface 14 of aeration regulation nut 17 is bonded completely, consolidates the closing of big venting channels more.Lead to based on as shown in Figure 10
The state that gas gap 18 is completely enclosed.Once main airspace 18 is completely enclosed, compressed air can only be by by letting out
The bleed passage 1-1 that stomata 13 is formed slowly is discharged outside inflator, and air discharging channel die-offs, and the air pressure of lower cavity 26 is fast
Speed increases, and the resistance that main piston mandril 38 moves downward also becomes rapidly very big, the speed for forcing main piston mandril 38 to move downward
Degree is lasting to be reduced.Simultaneously as the air pressure of lower cavity 26 increases rapidly, air pressure pushes second piston 10 such as arrow 1-
4 directions move upwards, and move up to push and swing piece fork arm 5, the fork arm pin 4 for swinging the top of piece fork arm 5 passes through lock
The swing sliding slot 3 for only swinging piece 36 makes locking swing direction swing of the piece 36 to main piston mandril lock tongue opening 32, final locking
The swing piece lock tongue 33 for swinging piece 36 stretches out outside main piston mandril lock tongue opening 32.Main piston top is stretched out swinging piece lock tongue 33
Lever lock tongue is open in the case where 32 outsides, if main piston mandril 38 continues to move downward, stretch out swing piece lock tongue 33 can be with
The upper surface of main air cylinder casing 12 collides, to prevent main piston mandril 38 from continuing to move downward, as shown in Fig. 6 state.
After 38 stop motion of main piston mandril, the air pressure of lower cavity 26 is not further added by, and the air of lower cavity 26 passes through bleeder port 13
Slowly lose heart, the compressed air of final lower cavity 26 is slowly discharged, and the air pressure of lower cavity 26 is gradually reduced, second piston
10 complete to reset in the case where second level reset spring 31 then acts on, and second piston mandril 8, which drives, swings piece fork arm 5, swing piece fork arm 5 again
Drive locking swings piece 36, is open inside 32 so that swing piece lock tongue 33 be made to retract main piston mandril lock tongue, at this time main piston top
Bar 38 can continue to move downward again, until buffer-type inflator component is in complete compressive state, as shown in Figure 7.
Elasticity ventilation diaphragm 25 can by with a thickness of 0.3-2 millimeter silica gel material or rubber material production.
The pore size of bleeder port 13 and big venting channels are closed the resistance negative that rear master piston mandril 38 moves downward
It closes, the aperture of bleeder port 13 is smaller then discouraged slower, and it is bigger that main piston mandril 38 moves downward resistance.The aperture root of bleeder port 13
According to design requirement, generally between 0.05 millimeter to 0.5 millimeter.
As shown in figure 11, the process that main airspace 18 is completely enclosed is the process of a positive feedback.Between main ventilation
When gap 18 just starts to be completely enclosed, the velocity amplitude that main piston mandril 38 moves downward is known as opening for buffer-type inflator component 2-2
Dynamic speed threshold；After the completion of closing, the air pressure of lower cavity 26 is discharged into the deformation bullet just below elasticity ventilation diaphragm 25
Pressure value when power, main airspace 18 are just opened is known as releasing stress thresholding.When the speed that main piston mandril 38 moves downward
Degree is once be more than starting speed threshold, then main airspace 18 is completely enclosed rapidly.Once closing is completed, the sky of lower cavity 26
Atmospheric pressure increases sharply, and air pressure is several times before main airspace 18 is completely enclosed, to further enhance pair
The closing of main airspace 18, while the resistance that main piston mandril 38 moves downward also increases sharply.It, then will be after the completion of closing
The air pressure of lower cavity 26 can just reopen big venting channels less than in the case where releasing stress thresholding.Big venting channels
Once being turned on, the air pressure of lower cavity 26 is discharged rapidly, and big venting channels are fully opened at once, main piston mandril 38 to
The resistance of lower movement is reduced rapidly.
Rotation aeration regulation nut 17 can be used to adjust middle section and the ventilation of the lower surface 19 of elastic air ventilation membrane 25
The size of the main airspace 18 of the upper surface 14 of adjusting nut 17 just starts to be completely enclosed to adjust main airspace 18
When the velocity amplitude that moves downward of main piston mandril 38, that is, the starting speed threshold of buffer-type inflator component 2-2.Between main ventilation
Gap 18 then starts that speed threshold is also big greatly, the speed that main piston mandril 38 moves downward main 18 ability of airspace when accordingly larger
It is completely enclosed；Main airspace 18 is small, starts that speed threshold is also small, the speed that main piston mandril 38 moves downward accordingly compared with
Hour, main airspace 18 can be completely enclosed.The speed that main piston mandril 38 moves downward is more than buffer-type inflator component 2-
Main airspace 18 is completely enclosed after 2 starting speed threshold, and the main piston mandril 38 of buffer-type inflator component 2-2 is transported downwards
Dynamic resistance increases suddenly, so that the movement velocity of main piston mandril 38 be forced to reduce.
Reset spring 27 selects lightweight spring, and coefficient of elasticity is smaller, it is only necessary to overcome one-way piston close when resetting
The frictional force of the inner wall Elastic Contact of the outer wall of seal 28 and main air cylinder casing 12, elastic force are enough as long as it can complete to reset
?.In compression process, the elastic force of reset spring 27 and main airspace 18 are completely enclosed what rear master piston mandril 38 was subject to
Air pressure compares, and the influence of the elastic force of reset spring 27 can be ignored.
The coefficient of elasticity of second level reset spring 31 is larger, and the air pressure before main airspace 18 is completely enclosed will not
Making its compression, the only air pressure after main airspace 18 is completely enclosed just can be such that second level reset spring 31 is compressed,
Second piston 10 is set to generate movement.
In conclusion buffer-type door leaf finger pinch device is not when by external force, main piston mandril 38 is in reset spring
Lower auto-extending is acted on, completes to reset.At closing time, when main piston mandril 38 is moved downward by external force, if movement
Speed it is smaller, then the resistance being subject to when moving is also smaller, and main piston mandril 38 can move downward like a dream, can be compared with
Easily to close the door.If the speed of movement is larger, when being more than preset starting speed threshold value, then it is subject to when moving
Resistance can increase suddenly, while the swing piece lock tongue 33 for swinging piece 36 stretches out 32 outside of main piston mandril lock tongue opening.It is biggish
Resistance forces the movement velocity of main piston mandril 38 to be reduced to lower level.When main piston mandril 38 movement velocity reduce,
The air pressure of lower cavity 26 less than after releasing stress thresholding, open by main airspace 18, and the air pressure of lower cavity 26 die-offs,
The resistance of motion of main piston mandril 38 becomes smaller, while the swing piece lock tongue 33 for swinging piece 36 retracts inside main piston mandril 38, this
Sample can smoothly close door leaf；If the speed of door leaf is very big at closing time, the resistance that main piston mandril 38 is subject to still without
Method makes the closing velocity of door leaf be reduced to a safe speed (such as below 2 cm/s), then the air of cavity 26 is descended to continue to
Higher pressure, the lock tongue 33 for stretching out 32 outside of main piston mandril lock tongue opening can prevent main piston mandril 38 from continuing to move,
As shown in Fig. 6 state, to directly stop the closing of door leaf.Door leaf is being stopped stop motion by main piston mandril lock tongue 33
Afterwards, the air pressure of lower cavity 26 starts to reduce, and until lock tongue 33 retracts 32 the inside of main piston mandril lock tongue opening, door leaf is just again
It can smoothly close.
As shown in FIG. 12 and 13, auxiliary fixing seat 2-3 is set in the main air cylinder casing 12 of buffer-type inflator component 2-2
Top, 12 tight fit of main air cylinder casing with buffer-type inflator component 2-2, plays and fixes and supports buffer-type inflator component 2-2
Effect.Subsidiary positioning bases 2-4 is set in the outside of the main piston mandril 38 of buffer-type inflator component 2-2, with buffer-type inflator
38 loose fit of main piston mandril of component 2-2 is played the role of positioning main piston mandril 38, and main piston mandril 38 can assist
Axially free in the through-hole of positioning seat 2-4 to slide up and down, the through-hole of subsidiary positioning bases 2-4 is provided with recessing groove 2-6 on one side, can be with
It allows stretching to swing piece lock tongue 33 to pass freely through, subsidiary positioning bases 2-4 will not stop to swing piece lock tongue 33.Inclined-plane block 2-5 installation
Right above the main piston mandril 38 of buffer-type inflator component 2-2 is axial.The utility model, can be according to actual use when implementing
Occasion selectively uses auxiliary fixing seat 2-3, subsidiary positioning bases 2-4, one or both of inclined-plane block 2-5, not entirely
Portion will use.
Specific embodiment 1 of one of the utility model for the embodiment of open-close type door leaf:
As shown in Figure 14 and Figure 16, buffer-type door leaf finger pinch device is installed on the downside of upper door frame 3-4, passes through inflator
Buffer-type inflator component 2-2 is fixedly mounted on upper door frame 3-4 by fixing seat 2-1 and auxiliary fixing seat 2-3, and when installation makes bearing
Lower surface of the 1 bearing axis 2 perpendicular to upper door frame 3-4.When door leaf 3-3 is closed to there are when certain interval 3-5, door leaf 3-3 with
The bearing 1 of the main piston mandril 38 of buffer-type inflator component 2-2 contacts and carries out compression movement to buffer-type inflator component 2-2.
If kinetic energy when door leaf 3-3 is closed is smaller, speed is lower, then the movement velocity of main piston mandril 38 is also relatively slow,
Lower than the starting speed threshold of buffer-type inflator 2-2, buffer-type door leaf finger pinch device keeps lesser resistance, so door leaf can
Easily to close.
If kinetic energy when door leaf 3-3 is closed is larger, speed quickly, then the movement velocity of main piston mandril 38 also quickly,
Once movement velocity is greater than the starting speed threshold of buffer-type inflator component 2-2, the resistance of buffer-type door leaf finger pinch device is prominent
The swing piece lock tongue 33 for so becoming larger, while swinging piece 36 stretches out 32 outside of main piston mandril lock tongue opening.The resistance to become larger suddenly
It forces the movement velocity of main piston mandril 38 to reduce, while also reduces the closing velocity of door leaf 3-3.If main piston mandril 38
Movement velocity be reduced to lower horizontal (less than 2 cm/s), the air pressure of lower cavity 26 lower than releasing stress thresholding,
Then main airspace 18 is opened, and the air pressure of lower cavity 26 die-offs, and the resistance of motion of main piston mandril 38 becomes smaller, and swings simultaneously
The swing piece lock tongue 33 of piece 36 is because the air pressure of lower cavity 26 reduces and retracts inside main piston mandril 38, door leaf at this time
Closing velocity has already decreased to a safer speed, can smoothly close door leaf, will not cause hand folding
Clamp hand accident.If kinetic energy when door leaf 3-3 is closed is very big, speed is too fast, the resistance of buffer-type inflator component 2-2 can not still make
It is still very big that the movement velocity of main piston mandril 38 is reduced to lower horizontal (less than 2 cm/s), the closing velocity of door leaf,
The lock tongue 33 for then stretching out 32 outside of main piston mandril lock tongue opening can prevent main piston mandril 38 from continuing to move, to prevent door
Fan continues to be closed, it is ensured that leaves enough safe gap 3-10 between door leaf 3-3 and doorframe, prevents door leaf clamp hand accident
Occur.
After door leaf is opened, without the blocking of door leaf, the main piston mandril 38 of buffer-type door leaf finger pinch device is multiple
Automatically reset stretching under the action of the spring 27 of position, is ready for starting next time.
It can be buffered by adjusting left-right position of the buffer-type door leaf finger pinch device when upper door frame 3-4 installs to adjust
The size of starting gap 3-5 when type door leaf finger pinch device starts such as is pressed the mobile installation site in the direction arrow 3-1, is then buffered
The starting gap 3-5 and safety clearance 3-10 of type door leaf finger pinch device accordingly become larger, and such as press the mobile installation position in the direction arrow 3-2
It sets, then the starting gap 3-5 and safety clearance 3-10 of buffer-type door leaf finger pinch device accordingly become smaller.
Another of the utility model is used for the specific embodiment of the embodiment of open-close type door leaf
As shown in Figure 17 and Figure 19, buffer-type door leaf finger pinch device is installed on the upper limb of door leaf 3-3, is fixed by inflator
Buffer-type inflator component 2-2 is fixedly mounted on door leaf 3-3 by seat 2-1 and subsidiary positioning bases 2-4.Make the axis of bearing 1 when installation
Hold the upper limb that axis 2 is parallel to door leaf 3-3；The 32 recessing groove sides 2-6 towards subsidiary positioning bases 2-4 of main piston mandril lock tongue opening
To prevent the subsidiary positioning bases 2-4 when swinging piece lock tongue 33 and stretching out from stopping to swing piece lock tongue 33.Inclined-plane block 2-5 is installed on
It is corresponding with the axial position of main piston mandril 38 of buffer-type inflator component 2-2 on doorframe 3-4.When door leaf 3-3 is closed to staying
When having certain interval 3-5, inclined-plane block 2-5 is contacted with the bearing 1 of the main piston mandril 38 of buffer-type door leaf finger pinch device.By
In the ramp effect of inclined-plane block 2-5, buffer-type inflator component 2-2 carries out compression movement.
If kinetic energy when door leaf 3-3 is closed is smaller, speed is lower, then the movement velocity of main piston mandril 38 is also relatively slow,
Lower than the starting speed threshold of buffer-type inflator 2-2, buffer-type door leaf finger pinch device keeps lesser resistance, so door leaf can
Easily to close.
If kinetic energy when door leaf 3-3 is closed is larger, speed quickly, then the movement velocity of main piston mandril 38 also quickly,
Once movement velocity is greater than the starting speed threshold of buffer-type inflator component 2-2, the resistance of buffer-type door leaf finger pinch device is prominent
The swing piece lock tongue 33 for so becoming larger, while swinging piece 36 stretches out 32 outside of main piston mandril lock tongue opening.The resistance to become larger suddenly
It forces the movement velocity of main piston mandril 38 to reduce, while also reduces the closing velocity of door leaf 3-3.If main piston mandril 38
Movement velocity be reduced to lower horizontal (less than 2 cm/s), the air pressure of lower cavity 26 lower than releasing stress thresholding,
Then main airspace 18 is opened, and the air pressure of lower cavity 26 die-offs, and the resistance of motion of main piston mandril 38 becomes smaller, and swings simultaneously
The swing piece lock tongue 33 of piece 36 is because the air pressure of lower cavity 26 reduces and retracts inside main piston mandril 38, door leaf at this time
Closing velocity has already decreased to a safer speed, can smoothly close door leaf, will not cause hand folding
Clamp hand accident.If kinetic energy when door leaf 3-3 is closed is very big, speed is too fast, the resistance of buffer-type inflator component 2-2 can not still make
It is still very big that the movement velocity of main piston mandril 38 is reduced to lower horizontal (less than 2 cm/s), the closing velocity of door leaf,
The lock tongue 33 for then stretching out 32 outside of main piston mandril lock tongue opening can prevent main piston mandril 38 from continuing to move, to prevent door
Fan continues to be closed, it is ensured that leaves enough safe gap 3-10 between door leaf 3-3 and doorframe, prevents door leaf clamp hand accident
Occur.
After door leaf is opened, without the blocking of inclined-plane block 2-5, the main piston mandril of buffer-type door leaf finger pinch device
38 automatically reset stretching under the action of reset spring 27, are ready for starting next time.
Buffer-type can be adjusted by adjusting left-right position of the buffer-type door leaf finger pinch device when door leaf 3-3 is installed
The size of starting gap 3-5 when door leaf finger pinch device starts such as presses the mobile installation site in the direction arrow 3-1, then buffer-type
The starting gap 3-5 and safety clearance 3-10 of door leaf finger pinch device accordingly become larger, and such as press the mobile installation position in the direction arrow 3-2
It sets, then the starting gap 3-5 and safety clearance 3-10 of buffer-type door leaf finger pinch device accordingly become smaller.
Specific embodiment of one of the utility model for the embodiment of parallel-moving type door leaf
As shown in Figure 20 and Figure 21, door leaf 3-6 and door leaf 3-7 are installed on the sliding rail 3-8 of sliding door upper door frame 3-9.Buffering
Type door leaf finger pinch device is installed on the upper limb side of door leaf 3-7, will be delayed by inflator fixing seat 2-1 and auxiliary fixing seat 2-3
Stamp inflator translation component 2-2 is fixedly mounted on door leaf 3-7.When closing sliding door, door leaf 3-6 and door leaf 3-7 is at a distance of certain
When starting gap 3-13, the side of door leaf 3-6 is contacted with the bearing 1 of the main piston mandril 38 of buffer-type door leaf finger pinch device.
Buffer-type inflator component 2-2 is set to carry out compression movement.
If kinetic energy when door leaf 3-6 and door leaf 3-7 closes up closing is smaller, speed is lower, then the fortune of main piston mandril 38
Dynamic speed is also relatively slow, and lower than the starting speed threshold of buffer-type inflator 2-2, buffer-type door leaf finger pinch device keeps lesser resistance
Power, so door leaf can be closed easily.
If kinetic energy when door leaf 3-6 and door leaf 3-7 closes up closing is larger, speed quickly, then the fortune of main piston mandril 38
Dynamic speed also quickly, once movement velocity is greater than the starting speed threshold of buffer-type inflator component 2-2, buffer-type door leaf finger
The resistance of device becomes larger suddenly, while the swing piece lock tongue 33 for swinging piece 36 stretches out 32 outside of main piston mandril lock tongue opening.It is prominent
The resistance so to become larger forces the movement velocity of main piston mandril 38 to reduce, while the speed for also closing up door leaf 3-6 and door leaf 3-7
It reduces.If the movement velocity of main piston mandril 38 is reduced to the air of lower horizontal (less than 2 cm/s), lower cavity 26
Pressure is lower than thresholding is released stress, then main airspace 18 is opened, and the air pressure of lower cavity 26 die-offs, main piston mandril 38
The resistance of motion becomes smaller, while swinging the swing piece lock tongue 33 of piece 36 because the air pressure of lower cavity 26 reduces and retracts main piston
Inside mandril 38, the closing velocity of door leaf has already decreased to a safer speed at this time, can smoothly close door leaf,
Clamp hand accident will not be caused hand folding.If the kinetic energy that door leaf 3-6 and door leaf 3-7 closes up is very big, speed is too fast, buffering
The resistance of type inflator component 2-2 can not still make the movement velocity of main piston mandril 38 be reduced to it is lower it is horizontal (less than 2 centimetres/
Second), door leaf 3-6 and door leaf 3-7 close up that speed is still very big, then stretch out 33 meeting of lock tongue outside main piston mandril lock tongue opening 32
Prevention main piston mandril 38 continues to move, so that door leaf 3-6 be prevented to continue to close up with door leaf 3-7, it is ensured that in door leaf 3-6 and door
Enough gaps are left between fan 3-7, prevent the generation of door leaf clamp hand accident.
After door leaf is opened, without the blocking of door leaf 3-6, the main piston mandril 38 of buffer-type door leaf finger pinch device exists
Automatically reset stretching under the action of reset spring 27, is ready for starting next time.
Claims (3)
1. buffer-type door leaf finger pinch device, including buffer-type inflator component (2-2) and inflator fixing seat (2-1), cooperation auxiliary
Fixing seat (2-3) or cooperation inclined-plane block (2-5), subsidiary positioning bases (2-4) composition；It is characterized by:
The inflator fixing seat (2-1) is set in the bottom of the main air cylinder casing (12) of buffer-type inflator component (2-2), and inflator is solid
The bottom of reservation (2-1) is provided with through-hole；
The buffer-type inflator component (2-2) includes the main piston mandril (38) that can be moved up and down, main piston mandril (38)
Top is provided with the bearing axis (2) of bearing (1) and fixing bearing, and bearing (1) projects slightly from the upper limb of piston mandril (38)；It is main
Air cylinder casing (12) is set in piston mandril (38) outside, and the lower piston of main piston mandril (38) can be along main air cylinder casing
(12) inner wall moves up and down, and main piston mandril (38) stretches out main air cylinder casing (12) outside by main air cylinder casing upper opening (30)
Portion；The one-way piston sealing ring (28) of one-way ventilating is set in the lower recess (11) of main piston mandril (38), with main piston
The airtight fixation of lower elastic of mandril (38)；The outer wall of one-way piston sealing ring (28) and the inner wall elasticity of main air cylinder casing (12)
Contact；Reset spring (27) is placed in main air cylinder casing (12) inside, and the both ends of reset spring (27) are stuck in main piston top
Between the bottom and elasticity ventilation diaphragm (25) of bar (38)；Elasticity ventilation diaphragm (25) is stuck in main air cylinder casing (12) lower thread
Between step (20) and ventilation fixing seat (23)；Main air cylinder casing (12) and ventilation fixing seat (23) pass through main inflator sealing ring
(22) it is threadedly engaged air-tight connection；There is a bleeder port (13) in the centre of elasticity ventilation diaphragm (25), has around bleeder port (13)
Evenly arranged big venthole (24)；The centre of ventilation fixing seat (23) is provided with aeration regulation nut (17), aeration regulation spiral shell
Female (17) are threadedly engaged air-tight connection by aeration regulation sealing ring (16) and ventilation fixing seat (23)；Elasticity ventilation diaphragm (25)
Lower surface (19) and aeration regulation nut (17) upper surface (14) between there are main airspace (18), rotate aeration regulation
The size of the adjustable main airspace (18) of nut (17)；Hexagon ventilation through-hole is provided among aeration regulation nut (17)
(15)；Stop sleeve (7) is located at the bosom position of main piston mandril (38), passes through sunk screw (9) and main piston mandril
(38) it is fixedly connected；The locking that locking swings piece (36) swings disk rotating shaft (37) and is fixed on stop sleeve (7) by through-hole
Top；The top for swinging piece fork arm (5) is fixed with fork arm pin (4), and fork arm pin (4) is located at the pendulum that locking swings piece (36) again
Dynamic sliding slot (3) are internal, and moving up and down swing piece fork arm (5) can make locking swing piece (36) generate corresponding swing；Locking pendulum
Movable plate (36) is partially located in the upper tine pike pole slot (35) for swinging piece fork arm (5)；It swings piece fork arm (5) and is in stop sleeve
(7) it in positioning through hole (6), can be slided up and down along positioning through hole (6)；The lower part for swinging piece fork arm (5) is provided with internal screw thread,
It is cooperatively connected with the upper external thread of the second piston mandril (8) of second piston (10)；Second piston sealing ring (29) is sleeved on
On the groove of second piston (10), with second piston (10) airtight fixation；Second piston sealing ring (29) and main piston mandril
(38) inner wall Elastic Contact；Second level reset spring (31) is located at the inside of main piston mandril (38), second level reset spring (31)
Both ends be stuck between the bottom of stop sleeve (7) and second piston (10)；Locking swing is corresponded on stop sleeve (7)
The position of the swing piece lock tongue (33) of piece (36) is provided with sleeve lock tongue opening (34)；In main piston mandril (38) corresponding swing mortice lock
The position of tongue (33) is provided with main piston mandril lock tongue opening (32).
2. buffer-type door leaf finger pinch device as described in claim 1, it is characterised in that: auxiliary fixing seat (2-3) set
Outside the top of main air cylinder casing (12) loaded on buffer-type inflator component (2-2), with the main inflator of buffer-type inflator component (2-2)
Shell (12) tight fit.
3. buffer-type door leaf finger pinch device as described in claim 1, it is characterised in that: subsidiary positioning bases (2-4) set
The outside of main piston mandril (38) loaded on buffer-type inflator component (2-2), with main piston mandril (38) loose fit；Inclined-plane block
(2-5) is installed on the doorframe of the axial surface of main piston mandril (38) of buffer-type inflator component (2-2), with main piston mandril
(38) bearing (1) composition inclined-plane cooperation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820890663.9U CN208280871U (en) | 2018-06-10 | 2018-06-10 | Buffer-type door leaf finger pinch device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820890663.9U CN208280871U (en) | 2018-06-10 | 2018-06-10 | Buffer-type door leaf finger pinch device |
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| Publication Number | Publication Date |
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| CN208280871U true CN208280871U (en) | 2018-12-25 |
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ID=64699641
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578458A (en) * | 2018-06-10 | 2019-12-17 | 黄海容 | Buffer type door leaf anti-pinch device |
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2018
- 2018-06-10 CN CN201820890663.9U patent/CN208280871U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578458A (en) * | 2018-06-10 | 2019-12-17 | 黄海容 | Buffer type door leaf anti-pinch device |
| CN110578458B (en) * | 2018-06-10 | 2024-02-02 | 黄海容 | Buffering type door leaf anti-pinch device |
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