CN215671711U - Safe anti-pinch mechanism and bottom beam translation door using same - Google Patents

Abstract

The utility model relates to the field of sliding doors, in particular to an anti-pinch mechanism and a bottom beam sliding door using the same, wherein the safe anti-pinch mechanism comprises: the device comprises a mounting seat, a swinging crank, a rotating shaft piece, a reset torsion spring and a microswitch; the front side wall of the mounting seat is a mounting plate, and the safety anti-pinch mechanism can be directly embedded into the specified position of the bottom beam translation door from the front side surface of a mounting notch part formed in the shell of the bottom beam translation door, so that the mounting and dismounting operations of the safety anti-pinch mechanism are simpler and more convenient; swing crank's swing can directly trigger the micro-gap switch that the periphery set up, the safety prevent pressing from both sides the trigger operation of mechanism with swing crank's swing operation is synchronous, makes safety prevent pressing from both sides the mechanism in simple structure and simple to operate, also can improve its trigger sensitivity and response speed, thereby can promote greatly the security of floorbar translation door also is convenient for realize the automatic accurate control in later stage.

Description

Safe anti-pinch mechanism and bottom beam translation door using same

Technical Field

The utility model relates to the field of sliding doors, in particular to a safe anti-clamping mechanism and a bottom beam sliding door using the same.

Background

The translation door is the most common door body and mainly comprises a manual door body and an electric door body. The manual translation door is generally arranged on the left and right of two door leaves and is mainly applied to bathrooms, balconies and the like of families. The electric translation door has the characteristic of multiple functions, has a door body with a strict requirement on resisting wind load, and is suitable for gates of building structures such as various plants, enterprises, schools, communities and the like.

The electric translation door has the advantages that the door leaves are large in number and high in movement speed, and clamping is caused at one end between the adjacent door leaves, so that the motor is easily damaged. In addition, in the debugging process of the electric translation door, the misplaced hand clamping of the adjacent door leaves can happen carelessly.

In order to enable the electric sliding door to have an anti-clamping function, an anti-clamping device and a sliding door applying the anti-clamping device are provided in the prior art, and the anti-clamping device can brake or move backwards in time to eliminate the clamping condition when the sliding door meets the clamping condition; however, the anti-pinch devices are not high in structural integration level and not sensitive enough in transmission triggering mechanism, so that the anti-pinch devices are inconvenient to mount when being applied to the sliding door and are not ideal in practical application effect.

SUMMERY OF THE UTILITY MODEL

In view of the above defects, the utility model aims to provide a safe anti-pinch mechanism and a bottom beam translation door using the same, wherein the safe anti-pinch mechanism has a compact structure and a high trigger response speed, so that the bottom beam translation door is safer to apply, and the automatic and accurate control is convenient to realize.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a safety anti-pinch mechanism, comprising: the device comprises a mounting seat, a swinging crank, a rotating shaft piece, a reset torsion spring and a microswitch; the front side wall of the mounting seat is a mounting plate, and the middle part of the mounting plate is provided with a mounting window; the rear side surface of the mounting plate is connected with a rotating shaft mounting hole, and the rotating shaft mounting hole is arranged opposite to the upper part and the lower part; the swing crank includes: the bending rod, and the connecting part and the rotating part which are respectively arranged at two ends of the bending rod; the rotating part is provided with a rotating through hole, and the periphery of the rotating part is provided with a triggering part; the bending rod penetrates into the mounting seat from the mounting window, so that the connecting part of the swinging crank is positioned on the front side of the mounting seat, and the rotating part of the swinging crank is positioned in the mounting seat; the rotating shaft piece sequentially penetrates through the rotating shaft mounting hole and the rotating through hole of the rotating shaft, so that the rotating part of the swinging crank is rotatably arranged in the mounting seat; micro-gap switch install in the mount pad, and be located the outside of triggering portion, reset torsion spring cover establish with the pivot outside and with the rotation portion is connected, makes the swing crank does not have under the exogenic action, triggering portion does not trigger micro-gap switch, overcomes as external force reset torsion spring makes during the swing crank rotates, triggering portion triggers micro-gap switch.

Preferably, the microswitch comprises a switch body and a trigger elastic sheet arranged on one side of the switch body, wherein the fixed end of the trigger elastic sheet is connected with the switch body, and the extension end of the trigger elastic sheet extends towards the outer side of the switch body in an inclined manner; the triggering part is a convex edge arranged on the periphery of the rotating part, and the convex edge is a cam structure which is convexly arranged on the outer wall of the rotating part; the convex edge rotates along with the swinging crank, and the extending end of the trigger elastic sheet is extruded to the switch body.

Specifically, the convex edge is an elliptical ring-shaped structure arranged on the periphery of the rotating part; the extension end of the trigger elastic sheet is tightly attached to the elliptical ring-shaped structure.

Preferably, the convex edge is a circular ring-shaped structure arranged on the periphery of the rotating part, and the circular ring-shaped structure is provided with a concave part; when the swing crank is restored to an unfired state under the action of the reset torsion spring, the extension end of the trigger elastic sheet is limited in the concave part.

Preferably, the extending end of the trigger elastic sheet is provided with a roller, and the roller is tightly attached to the convex edge to roll.

Preferably, the sectional dimension of the mounting window portion is larger than that of the swing crank; the mounting window part is provided with a sealing baffle sheet; the sealing baffle is formed by splicing at least two parts, and the middle part of the sealing baffle is provided with a swinging window through which the bending rod can pass.

Preferably, the mounting plate and the sealing separation blade are provided with screw holes; the sealing blocking piece is tightly attached to the back of the mounting window through a screw, and the mounting window is partially blocked.

Preferably, the anti-pinch mechanism further comprises an anti-pinch rod, two ends of the anti-pinch rod are connected with the connecting portion of the swing crank, and the anti-pinch rod is perpendicular to the swing crank.

Preferably, the bottom beam translation door comprises: the door comprises a door body, a bottom beam and a door body bracket; the bottom beam penetrates through the door body bracket from the bottom; the door body is of an integrated structure, is arranged above the bottom beam in a sliding manner and penetrates through the door body bracket; the safety anti-pinch mechanism is characterized in that the front side face and the rear side face of the door body support are both provided with the safety anti-pinch mechanism, the door body support is provided with an installation notch portion, the installation seat penetrates through the installation notch portion, the installation notch portion is embedded into the door body support, the installation plate is attached to the outer portion of the door body support, and the anti-pinch rod is parallel to the vertical surface of the outer shell of the door body support.

Preferably, the door body is of a fence type structure, and the rear end of the door body is provided with a tail pull rod assembly for adjusting the tightness of the door body; the bottom beam is provided with a guide rail, a roller structure and a driving device, and the door body moves along the guide rail under the driving of the driving device.

The utility model provides a safe anti-pinch mechanism and a bottom beam translation door using the same, wherein a mounting seat is used for mounting the safe anti-pinch mechanism on the bottom beam translation door, the mounting seat is provided with a mounting window through which a swing crank can pass, and a mounting plate for mounting with the bottom beam translation door is arranged on the front side wall of the mounting seat; in addition, the swing crank is rotatably installed on the installation seat through the rotating shaft piece, and the rotating shaft piece is directly limited and rotatably installed on the back face of the installation plate, so that the installation seat is simpler in structure, a sealed integral structure is not needed, the design of a splicing structure can be avoided, and the production and installation cost is greatly saved; more excellent, swing articulate's swing can directly trigger the micro-gap switch that the periphery set up, the safety prevent pressing from both sides the trigger operation of mechanism with swing articulate's swing operation is synchronous, makes the safety prevent pressing from both sides the mechanism in simple structure and simple to operate, also can improve its trigger sensitivity and response speed to can promote the security of floorbar translation door greatly, also be convenient for realize the automatic accurate control in later stage.

Drawings

FIG. 1 is a schematic view of the anti-pinch mechanism according to an embodiment of the present invention;

FIG. 2 is another schematic structural view of the embodiment shown in FIG. 1;

FIG. 3 is an exploded view of the embodiment of FIG. 2;

FIG. 4 is a schematic view of the anti-pinch mechanism according to an embodiment of the present invention;

FIG. 5 is a schematic view of the construction of the bottom beam translation door in one embodiment of the present invention;

fig. 6 is another schematic structural view of the bottom beam translation door in one embodiment of the present invention. Wherein: the anti-pinch safety device comprises a safety anti-pinch mechanism 100, a mounting base 110, a mounting plate 111, a mounting window 112, a rotating shaft mounting hole 113, a sealing baffle 114, a swing crank 120, a bending rod 121, a connecting portion 122, a rotating portion 123, a rotating through hole 124, a convex edge 125, a concave portion 126, a rotating shaft member 130, a reset torsion spring 140, a switch body 151, a trigger elastic piece 152, a roller 153, an anti-pinch rod 160, a door body 210, a bottom beam 220, a door body support 230 and a tail pull rod assembly 240.

Detailed Description

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1-6, a safety pinch prevention mechanism 100 includes: the mounting seat 110, the swing crank 120, the rotating shaft member 130, the reset torsion spring 140 and the microswitch; the front side wall of the mounting seat is a mounting plate 111, and a mounting window 112 is arranged in the middle of the mounting plate 111; the rear side surface of the mounting plate 111 is connected with a rotating shaft mounting hole 113, and the rotating shaft mounting hole 113 is arranged opposite to the upper part and the lower part; the swing crank 120 includes: a bending rod 121, and a connecting part 122 and a rotating part 123 respectively disposed at both ends of the bending rod 121; the rotating part 123 is provided with a rotating through hole 124, and the periphery of the rotating part 123 is provided with a triggering part; the bending rod 121 penetrates the mounting seat 110 from the mounting window 112, so that the connecting part 122 of the swing crank 120 is located at the front side of the mounting seat 110, and the rotating part 123 of the swing crank 120 is located in the mounting seat 110; the rotating shaft member 130 sequentially passes through the rotating shaft mounting hole 113 and the rotating through hole 124 of the rotating shaft, so that the rotating part 123 of the swing crank 120 is rotatably disposed in the mounting seat 110; micro-gap switch install in mount pad 110, and be located the outside of trigger portion, reset torsion spring 140 cover establish with the pivot is outside and with rotation portion 123 is connected, makes swing crank 120 does not have under the exogenic action, trigger portion does not trigger micro-gap switch, overcomes as external force reset torsion spring 140 makes when swing crank 120 rotates, trigger portion triggers micro-gap switch.

As shown in fig. 2 and 3, the micro switch includes a switch body 151 and a trigger spring 152 disposed at one side of the switch body 151, wherein a fixed end of the trigger spring 152 is connected to the switch body 151, and an extending end thereof extends obliquely to an outer side of the switch body 151; the triggering part is a convex edge 125 arranged on the periphery of the rotating part 123, and the convex edge 125 is a cam structure which is convexly arranged on the outer wall of the rotating part 123; the protruding edge 125 rotates along with the swing crank 120, and presses the extending end of the trigger spring 152 toward the switch body 151. The switch body 151 is an existing element, and is provided with a plurality of electrodes, the electrodes are electrically connected with an external control circuit through conducting wires, when the electrodes are conducted, the switch body 151 generates an electric signal, and the external control circuit can accurately control the movement of the bottom beam translation door according to the electric signal; in this embodiment, the conduction operation between the electrodes in the switch body 151 needs the trigger spring 152, when the trigger spring 152 is extruded to a certain extent by the convex edge 125, the trigger spring will conduct the electrodes in the switch body 151, so as to generate a corresponding electrical signal, the micro switch will be triggered as long as the swing of the swing crank 120 exceeds a set swing angle, and the trigger structure is more sensitive and has a faster response speed.

The cam structure applied to the convex edge 125 may be implemented in many ways as long as the convex edge 125 has different thicknesses in the radial direction, for example, the convex edge 125 is an elliptical ring structure disposed around the rotating portion 123; the extension end of the trigger spring 152 is tightly attached to the elliptical ring structure.

As shown in fig. 2 or fig. 3, the convex edge 125 may be an annular structure disposed around the rotating portion 123, and the annular structure is provided with a concave portion 126; when the rocking crank 120 is returned to the non-triggered state by the reset torsion spring 140, the extension end of the trigger spring 152 is limited in the recess 126. Adopt protruding edge 125 to set to have circular ring form structure for oval ring form structure, its benefit can guarantee swing crank 120 no matter be anticlockwise or clockwise swing, as long as exceed and set for the angle, trigger the extension end of shell fragment 152 and jump out depressed part 126 can both accurately trigger micro-gap switch makes no matter install that one side at the translation door in mechanism 100 is prevented to safety, mechanism 100 is prevented to safety can both play accurate operation of preventing pressing from both sides.

The extending end of the trigger spring 152 is provided with a roller 153, and the roller 153 rolls along the convex edge 125. The gyro wheel 153 makes it is difficult to the card extremely between the internal mechanism when swing crank 120 rotates, and the rolling resistance is littleer, works as swing crank 120 receives exogenic action, and external force is as long as compare the torsional spring 140 effort that resets is big, swing crank 120 will take place the swing, micro-gap switch just probably is triggered, has improved like this the sensitivity of mechanism 100 is prevented pressing from both sides by security greatly.

As shown in fig. 1 and 3, the sectional dimension of the mounting window 112 is larger than the sectional dimension of the rocking crank 120; the mounting window 112 is provided with a sealing baffle plate 114; the sealing baffle 114 is formed by splicing at least two parts, and a swinging window through which the bending rod 121 can pass is arranged in the middle of the sealing baffle. Because the rotating mechanism in the mounting seat 110 in the anti-pinch safety mechanism 100 is very compact, the size of the mounting window 112 is too large, and foreign matters such as external dust can easily enter the mounting interior, which may affect the normal operation of the rotating mechanism; however, because the installation needs to be completed by the swing crank 120 penetrating through the installation window 112, the installation window 112 cannot be set too small; in order to solve the contradiction, in this embodiment, the installation window 112 is additionally provided with a sealing blocking piece 114 formed by splicing, and the sealing blocking piece 114 can be spliced and installed at the installation window 112 after the safety anti-pinch mechanism 100 is assembled, so that the quick installation of the safety anti-pinch mechanism 100 can be ensured, and the installation window 112 can be partially sealed in time as required.

The mounting plate 111 and the sealing baffle plate 114 are provided with screw holes; the sealing flap 114 is closely attached to the back of the mounting window 112 by screws, and partially seals the mounting window 112. The installation mode of the sealing baffle plate 114 is simpler, and the structure is firmer.

As shown in fig. 4, the anti-pinch mechanism 100 further includes an anti-pinch bar 160, and both ends of the anti-pinch bar 160 are connected to the connecting portion 122 of the swing crank 120, such that the anti-pinch bar 160 is perpendicular to the swing crank 120. Prevent safely that mechanism 100 is pressed from both sides in practical application, for great safety, need be in setting up on a large scale of floorbar translation door assigned face prevent pressing from both sides mechanism 100 safely, prevent pressing from both sides the mechanism and increase and set up behind the clamping bar 160, as long as prevent that clamping bar 160 receives extrusion exogenic action, will drive swing crank 120 swings, thereby triggers micro-gap switch just so can make the within a wide range realize accurate anti-pinch detection.

As shown in fig. 5 and 6, the sill translation door includes: a door body 210, a bottom beam 220 and a door body bracket 230; the bottom beam 220 penetrates through the door body bracket 230 from the bottom; the door body 210 is an integrated structure, is slidably disposed above the bottom beam 220, and passes through the door body bracket 230; door body support 230's leading flank and trailing flank all are equipped with as above prevent pressing from both sides mechanism 100 safely, door body support 230 is equipped with installation breach portion, mount pad 110 passes installation breach portion embedding is installed extremely in door body support 230, the laminating of mounting panel 111 install in door body support 230's outside, prevent that clamping bar 160 all is on a parallel with the vertical setting in door body support 230's shell surface.

The door body 210 is of a fence type structure, and the rear end of the door body is provided with a tail pull rod assembly 240 for adjusting the tightness of the door body; the bottom beam 220 is provided with a guide rail, a roller structure and a driving device, and the door body 210 moves along the guide rail under the driving of the driving device.

The utility model provides a safe anti-pinch mechanism 100 and a bottom beam translation door using the same, wherein an installation seat 110 is used for installing the safe anti-pinch mechanism 100 to the bottom beam translation door, the installation seat 110 is provided with an installation window 112 through which a swing crank 120 can pass, an installation plate 111 for installing the bottom beam translation door is arranged on the front side wall of the installation seat 110, the safe anti-pinch mechanism 100 can be directly embedded into a specified position of the bottom beam translation door from the front side surface of an installation notch part arranged on the shell of the bottom beam translation door in actual installation, and then the installation plate 111 is attached and fixed with the side wall of the position, so that the safe anti-pinch mechanism 100 can be quickly installed on the bottom beam translation door without detaching and installing the shell of the bottom beam translation door, and the installation and detachment operation of the safe anti-pinch mechanism 100 is simpler and more convenient; in addition, the swing crank 120 is rotatably mounted to the mounting base 110 through the rotating shaft member 130, and the rotating shaft member 130 is also directly limited and rotatably mounted on the back surface of the mounting plate 111, so that the mounting base 110 is simpler in structure, a sealed integral structure is not required, a splicing structure design can be avoided, and production and mounting costs are greatly saved; more preferably, swing crank 120's swing can directly trigger the micro-gap switch that the periphery set up, the safety prevent pressing from both sides mechanism 100 trigger operation with swing crank 120's swing operation is synchronous, works as can trigger immediately when having the clamping condition to take place between door body 210 and the door body support 230 of floorbar translation door micro-gap switch signals of telecommunication, external control circuit can be rapidly right the removal condition of floorbar translation door is controlled, makes prevent pressing from both sides mechanism 100 in simple structure and simple to operate, also can improve its trigger sensitivity and response speed to can promote the security of floorbar translation door greatly, also be convenient for realize the automatic accurate control in later stage.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the utility model and should not be construed in any way as limiting the scope of the utility model. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims (10)

1. The utility model provides a mechanism is prevented pressing from both sides safely which characterized in that includes: the device comprises a mounting seat, a swinging crank, a rotating shaft piece, a reset torsion spring and a microswitch;

the front side wall of the mounting seat is a mounting plate, and the middle part of the mounting plate is provided with a mounting window; the rear side surface of the mounting plate is connected with a rotating shaft mounting hole, and the rotating shaft mounting hole is arranged opposite to the upper part and the lower part;

the swing crank includes: the bending rod, and the connecting part and the rotating part which are respectively arranged at two ends of the bending rod; the rotating part is provided with a rotating through hole, and the periphery of the rotating part is provided with a triggering part;

the bending rod penetrates into the mounting seat from the mounting window, so that the connecting part of the swinging crank is positioned on the front side of the mounting seat, and the rotating part of the swinging crank is positioned in the mounting seat; the rotating shaft piece sequentially penetrates through the rotating shaft mounting hole and the rotating through hole of the rotating shaft, so that the rotating part of the swinging crank is rotatably arranged in the mounting seat; micro-gap switch install in the mount pad, and be located the outside of triggering portion, reset torsion spring cover establish with the pivot outside and with the rotation portion is connected, makes the swing crank does not have under the exogenic action, triggering portion does not trigger micro-gap switch, overcomes as external force reset torsion spring makes during the swing crank rotates, triggering portion triggers micro-gap switch.

2. The safety anti-pinch mechanism according to claim 1, wherein the microswitch comprises a switch body and a trigger spring piece arranged on one side of the switch body, a fixed end of the trigger spring piece is connected with the switch body, and an extension end of the trigger spring piece extends obliquely towards the outer side of the switch body; the triggering part is a convex edge arranged on the periphery of the rotating part, and the convex edge is a cam structure which is convexly arranged on the outer wall of the rotating part; the convex edge rotates along with the swinging crank, and the extending end of the trigger elastic sheet is extruded to the switch body.

3. The anti-pinch mechanism as claimed in claim 2, wherein the protruding edge is an elliptical ring-shaped structure disposed around the rotating portion; the extension end of the trigger elastic sheet is tightly attached to the elliptical ring-shaped structure.

4. The safety anti-pinch mechanism according to claim 2, wherein the convex edge is a circular ring-shaped structure arranged on the periphery of the rotating part, and the circular ring-shaped structure is provided with a concave part; when the swing crank is restored to an unfired state under the action of the reset torsion spring, the extension end of the trigger elastic sheet is limited in the concave part.

5. The anti-pinch mechanism as claimed in claim 4, wherein the extension end of the trigger spring has a roller, and the roller rolls against the protruding edge.

6. The anti-pinch safety mechanism of claim 1, wherein the mounting window has a cross-sectional dimension greater than a cross-sectional dimension of the swing crank; the mounting window part is provided with a sealing baffle sheet; the sealing baffle is formed by splicing at least two parts, and the middle part of the sealing baffle is provided with a swinging window through which the bending rod can pass.

7. The anti-pinch safety mechanism according to claim 6, wherein the mounting plate and the sealing baffle are provided with screw holes; the sealing blocking piece is tightly attached to the back of the mounting window through a screw, and the mounting window is partially blocked.

8. The safety anti-pinch mechanism according to any one of claims 1 to 7, further comprising an anti-pinch bar, wherein both ends of the anti-pinch bar are connected to the connecting portion of the swing crank such that the anti-pinch bar is perpendicular to the swing crank.

9. The floorbar translation door, it includes: the door comprises a door body, a bottom beam and a door body bracket; the bottom beam penetrates through the bottom of the door body bracket; the door body is of an integrated structure, is arranged above the bottom beam in a sliding manner and penetrates through the door body bracket; the anti-pinch safety door is characterized in that the front side face and the rear side face of the door body support are both provided with the anti-pinch safety mechanism according to claim 8, the door body support is provided with an installation notch portion, the installation seat penetrates through the installation notch portion to be embedded into the door body support, the installation plate is installed outside the door body support in a laminating mode, and the anti-pinch rods are all parallel to the vertical arrangement of the surface of the shell of the door body support.

10. The bottom beam translation door as claimed in claim 9, wherein the door body is of a fence type structure, and a tail pull rod assembly for adjusting the tightness of the door body is arranged at the rear end of the door body; the bottom beam is provided with a guide rail, a roller structure and a driving device, and the door body moves along the guide rail under the driving of the driving device.

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