TWI629231B - Cord reel with function of calculating cable length - Google Patents

Abstract

The invention relates to a cord reel having the function of calculating the length of use of a cable, comprising: a frame; a reel rotatably disposed on the frame by a rotating shaft; and a flexible cable wound around the reel One side of the reel is directly or indirectly provided with a plurality of magnetic blocks which are equidistant from each other and arranged in a ring shape with respect to the rotation axis of the reel; three Hall elements are directly or indirectly disposed on The frame body, and corresponding to the magnetic blocks being equidistantly arranged along the moving path of the wire wheel, and the first to third distances of the three Hall elements are smaller than the adjacent two of the magnetic bodies a distance between the blocks; and a computing and display device disposed on the frame and electrically connected to the Hall elements, the computing and display device having a display screen facing outward.

Description

Cord reel with function of calculating cable length

The present invention relates to a cord reel, and more particularly to a cord reel having the function of calculating the length of use of a cable to ensure correct length calculation.

According to the conventional reel, most of them only provide the effect of winding and unwinding, and do not provide the function of pulling out the length calculation.

China Patent No. M409047 discloses an endoscope having a calculation length of a retractable wire, which mainly uses two receiving elements to correspond to a support bar disposed on a support frame thereof, and is disposed on one side of the wire wheel. a transmitting element, wherein the transmitting element rotates when the wire wheel rotates, and receives the signal emitted by the transmitting element when passing the receiving component, thereby detecting the number of revolutions and determining by the two receiving components The direction of rotation of the reel.

However, the aforementioned prior art has a problem of incorrect length calculation or low precision when calculating the length of use (for example, the extension length or the retraction length). Under normal conditions, the take-up or winding is continuous, and the transmitting component will normally pass the two receiving components to determine the number of turns and direction. However, when the user hesitates between the winding and the take-up action, when the action is reciprocating, it may happen that the transmitting element rotates clockwise when the wire rotates clockwise until the receiving component receives the signal, and the wire wheel rotates counterclockwise. So that the other receiving component receives the signal, at this time, the system will misjudge the reel to rotate clockwise, and then misjudge the number of turns and direction. In addition, since the aforementioned prior art uses only one transmitter, the accuracy of the length can only calculate the line rotation. The number of laps is dynamic, so the unit length of the calculation is large, and the more accurate length cannot be calculated.

In addition, according to the patent specification of the prior art, the display length is a display function by connecting the cable of the endoscope to the host of the endoscope itself, and the cord reel itself does not have the function of displaying the length. Therefore, the prior art must select an endoscope that can match the display length to be used, and its use is greatly limited.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a cord reel having a function of calculating the length of use of a cable, which can accurately determine the length of use.

It is still another object of the present invention to provide a cord reel having a function of calculating the length of use of a cable, which can calculate a relatively accurate length.

Another object of the present invention is to provide a cord reel having the function of calculating the length of use of a cable, which has the function of displaying the length itself, can be matched with a wider variety of devices, and has a wider application level.

In order to achieve the foregoing object, a cord reel having the function of calculating the length of use of a cable according to the present invention comprises: a frame; a reel rotatably disposed on the frame by a rotating shaft; a flexible cable Winding on the reel; one side of the reel is directly or indirectly provided with a plurality of magnetic blocks, which are equidistant from each other and arranged in a ring shape with respect to the rotation axis of the reel; three Hall elements Is disposed directly or indirectly on the frame body, and is equidistantly arranged corresponding to the movement paths of the magnetic blocks as the wire wheel rotates, and the first to third distance systems of the three Hall elements are further And a computing and display device disposed on the frame and electrically connected to the Hall elements, the computing and display device having a display screen facing outward.

In this way, in addition to accurately calculating the length of use of the cable, it is also possible to obtain It has a wide application level for precise length and can be combined with a variety of devices.

10‧‧‧Reel with a function to calculate the length of the cable

11‧‧‧ ‧ frame

21‧‧‧ reel

211‧‧‧ board

22‧‧‧ shaft

24‧‧‧Magnetic block

31‧‧‧Flexible cable

41‧‧‧ Hall element

51‧‧‧Computation and display devices

52‧‧‧ display screen

54‧‧‧Micro Control Unit

56‧‧‧ button

58‧‧‧Wireless transmission module

Figure 1 is a perspective view of a preferred embodiment of the present invention.

Figure 2 is a front elevational view of a preferred embodiment of the present invention.

Figure 3 is a side elevational view of a preferred embodiment of the invention.

Figure 4 is a block diagram of a circuit in accordance with a preferred embodiment of the present invention.

Figure 5 is a schematic view of the operation of a preferred embodiment of the present invention.

Figure 6 is a block diagram of another circuit in accordance with a preferred embodiment of the present invention.

For a detailed description of the technical features of the present invention, the following preferred embodiments are described with reference to the following figures: Referring to Figures 1 to 4, one of the preferred embodiments of the present invention has a computing cable. The length function reel 10 is mainly composed of a frame 11, a reel 21, a flexible cable 31, three Hall elements 41 and a computing and display device 51, wherein: the reel 21 is provided by a The rotating shaft 22 is rotatably provided to the frame body 11. One side of the reel 21 is provided with a plurality of magnetic blocks 24 directly or indirectly, and the magnetic blocks 24 are equidistant from each other and arranged in a ring shape with respect to the rotating shaft 22 of the reel 21. In the present embodiment, the magnetic blocks 24 are exemplified by an indirect arrangement, which is implemented in such a manner that one side of the reel 21 has a plate body 211, and the magnetic blocks 24 are disposed on the plate body 211. The grounding is provided on the reel 21. In the present embodiment, the magnetic blocks 24 are exemplified by four.

The flexible cable 31 is wound around the reel 21. For the convenience of the graphical representation, The present invention only shows the flexible cable 31 in Fig. 1, which is not shown in other drawings.

The Hall elements 41 are directly or indirectly disposed on the frame body 11 and are arranged equidistantly corresponding to the movement paths of the magnetic blocks 24 as the wire wheel 21 rotates, and the three Hall elements 41 are further The distance from the first to the third in the order of arrangement is smaller than the distance between the adjacent two of the magnetic blocks 24. In this embodiment, the Hall elements 41 are arranged in an arc shape.

The computing and display device 51 is disposed on the frame 11 and electrically connected to the Hall elements 41. The computing and display device 51 has a display screen 52 facing outward. In the present embodiment, the computing and display device 51 has a micro control unit 54 electrically connected to the Hall elements 41 and the display screen 52. In addition, the computing and display device 51 has a plurality of buttons 56 electrically connected to the micro-control unit 54, thereby providing a user-input interface for the user to operate a basic control action such as setting or zeroing. In the present embodiment, the Hall elements 41 are disposed inside the computing and display device 51 and are indirectly disposed on the frame 11.

The architecture of this embodiment has been described above, and the operational state of this embodiment will be described next.

Referring to FIGS. 1 to 3 and 5, since the first to third distances of the three Hall elements 41 are smaller than the distance between the adjacent two magnetic blocks 24, it is ensured that there is no two magnetic simultaneously. Block 24 corresponds to the Hall elements 41. When in use, when the user pulls out or retracts the flexible cable 31, the reel 21 is driven to rotate, so that the magnetic blocks 24 continuously pass through the three Hall elements 41, thereby measuring the line. The angle of rotation and direction of the wheel 21. Wherein, since the present invention is provided with a plurality of magnetic blocks 24 (four in the embodiment), each of the magnetic blocks 24 is sensed, that is, the angle of rotation is 90 degrees, which is converted into the flexible cable 31. Winding around the length of the single turn of the reel 21 results in a more accurate length result than conventional techniques. The micro control unit 54 is mainly responsible for receiving The signal sensed by the three Hall elements 41 is displayed on the display screen 52 after being judged and calculated, so that the user can interpret the signal. Moreover, the user can operate the computing and display device 51 to zero after the flexible cable 31 is pulled out for a length, and then continue to use the flexible cable 31, and can be recalculated after returning to zero. The effect of the length.

The three Hall elements 41 used in the present invention ensure that the direction detection is not erroneous. The reason is that when only two Hall elements 41 sense the magnetic block 24 and the other Hall element 41 does not sense the magnetic block 24, it means that the wire wheel 21 does not rotate or is reciprocating, only When the three Hall elements 41 sense the magnetic block 24 in sequence, it can be regarded as a certain dynamic, and can be used as a basis for calculating the length. By this, the correct length can be calculated, and the loss of the length of the miscalculated length of the prior art is also improved.

Moreover, by providing the calculation and display device 51 on the frame body 11, the effect of allowing the user to directly view the length of use can be achieved. It can be seen that the invention does not need to be connected to a device capable of displaying the length, and the application level can be more extensive.

It should be noted that the magnetic block 24 in the foregoing embodiment is illustrated by being indirectly disposed on the reel 21, however, the magnetic blocks 24 may be directly disposed on the reel 21, and have the same The effect of the rotation of the reel. Moreover, the Hall element 41 in the foregoing embodiment is described as being indirectly disposed on the frame body 11. However, the Hall element 41 may be directly disposed on the frame body 11, and may also have a detection magnetic block. 24 effect.

In addition, it should be added that, as shown in FIG. 6, the computing and display device 51 can further add a wireless transmission module 58 and be electrically connected to the micro control unit 54. Thereby, it can be wirelessly connected to other hosts. For example, when the present invention is used together with an endoscope, it can be wirelessly connected to an endoscope main body (not shown) to calculate the length of use of the endoscope cable, in addition to Can be in In addition to the length of use displayed on the display screen 52, the calculated result may also be transmitted to the endoscope host via the wireless transmission module 58, and the length may be displayed by the endoscope host. The specification of the wireless transmission module 58 can be W-i-Fi, Bluetooth (Blue Tooth) or RF radio. It can be seen that, by the wireless transmission module 58, the length information can be wirelessly transmitted to the matching host, and the length information can be displayed in addition to the length information displayed in the computing and display device 51. The effect of length information is displayed on other hosts, which makes the user more convenient to use.

Claims (7)

A cord reel having a function of calculating a length of a cable, comprising: a frame; a reel rotatably disposed on the frame by a rotating shaft; and a flexible cable wound around the reel; One side of the reel is directly or indirectly provided with a plurality of magnetic blocks which are equidistant from each other and arranged in a ring shape with respect to the rotation axis of the reel; and further includes: three Hall elements directly Or indirectly disposed on the frame body, and correspondingly arranged, the magnetic blocks are equidistantly arranged along the movement route when the wire wheel rotates, and the distance coefficient of the first to third distances of the three Hall elements is less than adjacent The distance between the two magnetic blocks; and a computing and display device disposed on the frame and electrically connected to the Hall elements, the computing and display device having a display screen facing outward. The cord reel having the function of calculating the length of use of the cable, as described in claim 1, wherein the Hall elements are arranged in an arc shape. The cord reel having the function of calculating the length of use of the cable according to claim 1, wherein the Hall elements are disposed inside the computing and display device and are indirectly disposed on the frame. The reel having the function of calculating the length of use of the cable according to claim 1, wherein the computing and display device has a micro control unit electrically connected to the Hall elements and the display screen. A cord reel having a function of calculating a length of a cable as described in claim 4 of the patent application, The calculation and display device has a plurality of buttons electrically connected to the micro control unit. The reel having the function of calculating the length of use of the cable according to claim 1, wherein: one side of the reel has a plate body, and the magnetic blocks are disposed on the plate body, and are indirectly disposed on the plate body. The reel. The reel having the function of calculating the length of use of the cable according to claim 4, wherein the computing and display device has a wireless transmission module electrically connected to the micro control unit.