Summary of the invention
What technical problem to be solved in the utility model provided a kind of compress falls to be with prosthetic device, can in time prevent strap to fall band, avoids wearing again from cassette holder by hand the loaded down with trivial details work of strap.For this reason, the utility model is by the following technical solutions: it comprises send-back driving wheel and the send-back flower wheel that cooperates with it, fastening belt driving wheel and the fastening belt flower wheel that cooperates with it, according to strap send the band direction, described fastening belt flower wheel is in before the send-back flower wheel; Described send-back flower wheel is connected on first swinging gear, and described fastening belt flower wheel is connected on second swinging gear; Described device also is provided with inductive switch, and described inductive switch is controlled the action of second swinging gear.Owing to adopt the technical solution of the utility model, in case taking place, strap falls band trend, can send signal by inductive switch, make the action of second swinging gear, fastening belt flower wheel and fastening belt driving wheel clamp strap, prevent that strap from falling band, and can restart to send band, avoid from cassette holder, wearing again by hand the loaded down with trivial details work of strap by send-back driving wheel and the cooperation of send-back flower wheel.
The specific embodiment
With reference to accompanying drawing.The utility model comprises send-back flower wheel 12, the fastening belt driving wheel 21 of send-back driving wheel 11 and cooperation with it and the fastening belt flower wheel 22 that cooperates with it, be with direction A according to sending of strap, described fastening belt flower wheel 22 is in before the send-back flower wheel 12; Described send-back flower wheel is connected on first swinging gear, and described fastening belt flower wheel is connected on second swinging gear; Described device also is provided with inductive switch 9, and described inductive switch is controlled the action of second swinging gear.
Second swinging gear comprises suction tube 71 and fork 72, and described second swinging gear is by suction tube 71 pulling forks 72, and the axle mounting of fastening belt flower wheel is on eccentric stiffener, and eccentric stiffener is connected on the fork 72, between suction tube 71 and the fork 72 extension spring 73 is set.The work of described inductive switch 9 control suction tubes 71.
Described first swinging gear comprises swing arm 61, slave arm 62, slave arm 62 is provided with by the bearing 63 of camming action, and slave arm 62 drives swing arm 61 swings, and the axle mounting of send-back flower wheel is on eccentric stiffener, eccentric stiffener is connected in the swing arm 61, and first swinging gear also is provided with reset tension spring.
Described inductive switch is the inductive switch of induction first swinging gear action.Such as, as present embodiment, be the inductive switch of induction swing arm 61 actions.Perhaps, inductive switch also can be the inductive switch of induction slave arm 62 actions.
As shown in Figure 3, Fig. 3 has demonstrated the structure of above-mentioned eccentric stiffener, above-mentioned eccentric stiffener comprises connecting panel 201 and is installed in the eccentric shaft 202 of connecting panel one side that eccentric shaft 202 links to each other with swinging gear, the opposite side connection fastening belt flower wheel of connecting panel or the axle 200 of send-back flower wheel.
Move back when band when carrying out strap, if when falling to be with trend, first swinging gear can move because of the play of strap flower wheel.At this moment, inductive switch 9 has been sensed parts in first swinging gear and has been sent a signal after such as the swing of fork 61 or slave arm 62 and make suction tube 71 adhesives, the action of second swinging gear, fastening belt flower wheel and fastening belt driving wheel clamp strap, prevent that strap from falling band, main motor 3 starts, and send-back driving wheel and send-back flower wheel cooperate clamps strap, restart to send band, the situation that strap falls band so just can not occur.