KR930009709B1 - Portable electro-cardiographic recorder - Google Patents

Abstract

No content.

Description

Portable ecg register

1 is a front view of the recorder of the preferred embodiment, with the top of the recorder case closed.

2 is a plan view of the inside of the case bottom showing the relative positions of some of the components in relation to the tape cassette to be used in the recorder.

FIG. 2A is a partial cross-sectional view taken along the line 2A-2A of FIG. 2; FIG.

2b is a front view of a portion of the invention, taken along the line 2B-2B of FIG.

3 is a plan view of the bottom of the recorder, taken along line 3-3 of FIG. 1, with a portion of the bottom removed to expose a portion of the components of the recorder.

3A is a front view of a hexagonal head retainer for use in the present invention.

4 is a front view of the recorder showing details of the mounting state of the capstan assembly, taken along line 4-4 of FIG.

FIG. 5 is a plan view of the recorder, taken along line 5-5 of FIG. 1, with portions removed to show the engagement of several components of the recorder.

5a is a side view of the roller spring of FIG. 5 attached to the slide assembly.

6 is a side view taken along the line 6-6 of FIG.

7 is a front view cut along the line 7-7 of FIG.

8 is a cross-sectional view of the capstan assembly of FIG. 4 taken along line 8-8.

9 is a side cross-sectional view of the case and inner frame of the recorder of FIG.

9A is a cross-sectional view of a portion of the recorder cut along line 9A-9A in FIG. 9;

10 is a detailed cross-sectional view of the winding spindle portion of the recorder of FIG.

11 is a bottom view of the recording head mounting bracket and the leaf spring.

FIG. 12 is a cross sectional view of the bracket of FIG. 1 showing a state mounted to a portion of the slide assembly along the leaf spring for head adjustment.

13 is a perspective view of a case of the recorder showing only an inner frame mounted on the inside with the top open;

14 is a perspective view of a slide assembly portion of the recorder of the preferred embodiment.

* Explanation of symbols for main parts of the drawings

200: recording head 206: cassette tape

210: pinch roller assembly 202: U-shaped bracket

214, 408: Roller 215: Cylindrical Plastic Bearing

230: Battery 232, 234: Matching terminal

236: battery slide 238: spring

250: motor and gear assembly 252: motor

254: gear case 256: gear case fleece

302, 304, 810: retainer 308: winding spindle mounting post

320: clamp 322: main pulley belt

326: belt 404: idler pulley

502: roller spring 520: automatic roller spring release mechanism

522: main body 524: spring

530, 532: pole member 600: switch spring

604, 1210, 1214: screw 610: micro switch

800: capstan assembly 802: capstan

804, 806: capstan pulley 808: bearing

820: triangular base 822: hollow cylinder

830 opening 952, 1369 cylindrical portion

953: circuit board 1000: winding spindle

1002: triangle plate 1004: shaft

1006: spindle drive 1008: bottom circumferential plate member

1010: cylindrical member 1012: winding spindle pulley

1018 Hubble 1020 Retainer Clip

1022: pressure spring 1100: slot

1200: mounting bracket 1202: adjustment spring

1204: Base 1300: Case

1302: Bottom member 1312: Cutout region

1340: frame 1344: flat portion

1362: upper member 1368: hinge portion

1400: slide assembly 1402: body portion

1406: roller support 1410, 1420: slide assembly foul member

1416: Double Bracket 1422: Biasing Spring

1450, 1452: screw holes

The present invention relates to a recording device for recording an electrocardiogram signal, and more particularly to an improved portable recorder.

Some types of heart disorders in the early stages sometimes produce abnormal electrocardiograms (ECGs) only sporadically. In order to eliminate such sporadic abnormal ECG and detect cardiac disorder early, the patient has conventionally carried a portable recorder capable of continuously recording the ECG signal of the patient for a long time while performing normal daily activities.

These prior art writers include a battery powered magnetic tape recorder mechanism that writes to a standard magnetic tape cassette. At a speed of only 1 mm per second, the cassette can record 24 to 48 hours of data.

While relatively compact and simple, [6.11 "x 3.9" x 1.6 "(15.5 cm x 9.9 x 4.1 cm) and 13/4 to 2 lbs. Prior art devices make the operator feel significantly uncomfortable, reducing size and weight. However, the size and weight are mainly controlled by the size and weight of the batteries, motors and cassettes required to record 24 to 48 hours of data.

In addition, in the prior art device, the recorder head and the pinch roller must be manually moved to the recording position while the case of the recorder is opened. When the case is closed, the start switch is manually engaged. It is desirable to have all of these startup actions automatically when the case is closed.

Also, in many prior art recorders, a small amount of oil light bearings are used for the pinch rollers and a ball bearing is used for the capstan, but due to the slow writing speed the small amount of oil bearings are sometimes improperly oiled and fail. Is easily caused, and the concave portion in the ball bearing generates noise during recording.

The present invention provides a compact and lightweight portable ECG signal recorder for use in walkable patients. The recorder of the present invention is 5.5 "+ 3.3" + 0.8 "(14 cm x 8.4 cm x 2 cm) and weighs 9 oz (28.3 g). This small size is made possible by using several new techniques.

The portable recorder includes a relatively flat case having a bottom and a top movably mounted to the bottom. The support means or frame is preferably mounted on the bottom inside the case for supporting the tape cassette on one side. The recorder includes a capstan assembly including a rotatable capstan, and a pinch roller assembly for interacting with the capstan to move the tape. The capstan is rotated around an axis perpendicular to the face of the case by a pulley device driven by a motor and gear case assembly that rotates around a side in the plane parallel to the case, which pulls the gear case drive force to the capstan drive force. And an idler pulley rotatable about an axis intersecting the capstan and the motor axis to rotate the belt that engages the belt.

When the top of the case is engaged in the case near the hinge between the top and the bottom and closed by sliding movement of the slide assembly, the motor is automatically switched on, the pinch roller is moved to engage the capstan, and the recording head is moved to the moving cassette. It is moved to a recording position adjacent to the tape.

The slide assembly includes a body portion coupled to the elongate portion. The slide assembly is put into the case by a roller attached to the back side of the body portion so as to rotately engage with the case when the case is opened and closed. In combination with opposite sides of the body portion, a pair of retainers are mounted at the bottom of the case, One retainer and the mounting post slide-engage with opposite sides of the elongate portion, and a spring is attached to the elongate portion and the case, preferably one of the body-side retainers.

The magnetic recording head is mounted on the upper surface of the body portion of the slide assembly, and when the case is closed, the upper portion pushes the rollers so that the slide assembly moves the recording head near the tape against the action of the spring. When the case is opened, the spring contracts to move the slide assembly and to move the recording head away from the tape. The roller spring attached to the slide assembly engages with the pinch roller assembly to bias the pinch roller in engagement with the capstan when the case is closed, while the slide assembly engages with the pinch roller assembly and counteracts the action of the spring when the case is opened. Also included is a pawl member adapted to move the pinch roller away from engagement with the capstan.

An apparatus is provided for releasing the roller spring from the assembly when the case is empty to reduce wear on the pinch roller. Plastic bearings are also used to mount and support the rotating capstan. These plastic bearings are designed to allow slow rotating capstans to withstand prolonged wear. The same plastics are used as bearings for rollers and do not require lubrication like small oil supply bearings.

The present invention will now be described in detail with reference to the accompanying drawings.

[Cases and frames]

First, referring to FIG. 13, there is shown a perspective view of a case 1300 of the recorder of the preferred embodiment (indicated by reference numeral 100 in FIG. 1) with the top of the case shown partially open. The case is made of molded plastic and is relatively thin in height and fairly flat in design compared to the thickness of a standard 9V battery or standard cassette tape that needs to be accommodated.

The case consists of a bottom member 1320 having a bottom 1303, a front wall 1304, sidewalls 1306 and 1308, and a back wall 1310, the rear wall 1301 of which the wall 1310 is formed. At least half of the height has cuts in region 1312. These walls have a predetermined thickness, with the front and rear walls 1304 and 1310 becoming slightly thicker than the side walls 1306 and 1308.

The back wall 1310 includes slots 1316 on opposing edges of the back wall that form cuts in region 1312. The front wall also includes a concave region 1318 that is tapered from the total wall thickness of line 1320 to about a half wall thickness at the top of the wall 1322. Two tabs 1324 and 1326 are connected to the top of the front wall 1304 within the recessed area. These tabs have a taper or lateral extension 1330.

The recorder includes a frame 1340. The frame 1340 is adapted to be attached to the bottom of the case by an internal threaded post that is embedded in the bottom of the frame at position 1342a-h. Each post (an example of which is shown in the cross sectional view of FIG. 9A) has a portion 950 embedded in frame 1340 and an enlarged cylindrical portion 952 extending away from the bottom of the frame. Each post is hung on a circuit board 953 disposed on the bottom of the case and supported on a raised portion 954 of a plastic rib (such as rib 958) that is integrally molded with it. Holes (such as hole 960) are provided at various locations through the bottom of the case, the circuit board 953, and the raised portion. Screws inserted from the bottom up are screwed into the posts to secure the frame to the bottom into which the circuit board is inserted.

The frame includes a fairly flat portion 1344 to support a tape cassette for recording ECG information. This frame is also used to support a number of other components.

Circuits for operating the head and recording ECG information are well known and are not part of the present invention. Circuit components are mounted to the circuit board using surface mount technology. However, the overall packaging of the components of the recorder, including mounting the surface mount components relative to the circuit board, is one feature of the present invention.

The upper member 1362 of the recorder case has integrally molded side, front and rear walls 1164 that are considerably smaller than the walls of the bottom member except for the cutout region 1312 in the upper surface and the rear wall 1310. It is a fairly flat mold plastic part. At the top there is a downwardly extending wall 1366 with a hinge 1368 along the bottom edge. The hinge portion includes an inclined extending cylindrical portion 1369 at the ends to fit within the slot 1316.

The frame 1340 includes tabs 1346 and 1347 that extend to the lid of the cylindrical portion 1369 and pivotally connect the top member 1362 to the bottom member 1302.

Referring to FIG. 9, there is shown a cross-sectional view of the case with the frame closed in place. Upper member 1362 includes a lip 902 extending inwardly along a portion of the edge of front wall 1164 of the upper member in the regions of the tabs 1324 and 1326. These tabs, made of plastic and relatively thin, are inclined inward when the edges of the front wall 1364 join these tabs to snap the lip 902 to a location below the federal section 1330. It is inclined elastically so that a case may be closed.

Unlike prior art devices, the present invention is designed to provide automatic recording and power off characteristics that are activated by opening and closing the case. According to the invention, when the device is placed on the patient, the cassette is placed inside and the case is closed. The power is turned on, the tape starts to move, and recording begins. If the case is opened after the recorder is removed from the patient, all operations are automatically stopped.

This includes a slide assembly for closing the case and moving in and out as it is opened, a recording head and mounting assembly for mounting the recording head onto the slide assembly, a capstan assembly and a pinch roller assembly for moving the tape in the reset across the recording head. Resulting from the interaction of several different assemblies mounted inside the case, including a winding spindle for use in a cassette, and a motor, gear case and pulley device for applying driving force to the capstan and the winding spindle. Other components may be closed with the pore member and biasing spring attached to the slide assembly, and the case without the cassette inside, to automatically engage and disengage the pinch rollers relative to the capstan as the case is opened and closed. And an assembly to prevent the pinch roller from biasing the spring. An automatic motor switch assembly is provided that is actuated by the movement of the slide assembly, and special plastic bearing designs for capstan and pinch rollers are provided to minimize wear and extend the life of the bearing.

Slide assembly and frame mounting state of this slide assembly

14 is a perspective view of a slide assembly 1400. This slide assembly consists of a fairly flat body portion 1402 and an elongate portion 1404 coupled to and integrally formed with the body portion. A roller support 1406 for pivotally supporting the roller 1408 is connected to the rear side of the main body portion 1402. This roller support 1406 extends vertically upward from the body.

The slide assembly also includes a first foul member 1410 attached to and extending outwardly from one side of the body portion 1402. Vertical post 1412 is embedded in the body portion near to which the foul member 1410 is attached.

The double bracket 1416 is attached to the body portion 1402 side opposite the first foam member, and the second foam member 1402 shown in dashed lines is attached to the elongated member 1404 and extends vertically downward.

Referring to the drawings, the slide assembly is a steel hexagonal head retainer 302 and 304 screwed to the frame from the bottom at positions 1350 and 1352, ie posts 306 and positions embedded in the frame at position 1342d. It is contained in the case by a winding spindle mounting post 308 embedded in the frame at 1356a. These retainers have the form shown in FIG. 3A, which consists of a hexagonal head 390 and a cylindrical body portion 392.

Sides 1430 and 1432 of the slide assembly 140 slide between the body portions 392 of the retainer 302 and 304, and the sides 1434 and 1438 slide between the posts 306 and 308. Hexagonal heads of retainers 302 and 304 overlap the body portion 1402, and the frame mounting post 306 has a portion that overlaps the elongate portion 1404. This overlap keeps the slide assembly in the horizontal plane.

A biasing spring 1422 is connected at the end 1440 to the notch in the second pole member 1420 and at the other end to the retainer 304. In FIG. 3, the roller 1408 extends beyond the rear wall 1310 of the bottom of the case in the area 1312 where the roller is in position due to the action of the spring 1422 when the top of the case is opened. Is shown. However, when the upper member of the case approaches the closed position, the upper wall portion 1366 and the inner surface engage the roller 1408 to bring the slide assembly 1400 into the case against the biasing action of the slide spring 1422. Push. When the case is completely closed, the slide assembly is in the recording position (shown in FIG. 5). The slide assembly is limited by retainers, posts, springs 1422 and wall portions 1366.

[Recording head and mounting assembly]

The preferred embodiment recorder uses a four-track, four-channel cassette analog magnetic tape head selected from VICRON's VICRON P-3Q1-B7 family of recorder heads (and slightly modified) to record ECG information on cassette tapes. . The recording head is part of the recording head assembly attached to the slide assembly 1400 at hole positions 1450 and 1452 in the base 1402. The recording assembly comprises the recording head 200 described above attached to the slide assembly and shown in FIG. 5 without the slide assembly but shown in the relevant position of the cassette tape 206 in the recording position. This recording assembly also includes a mounting bracket 1200 and an adjustment spring 1202 as shown in FIGS. 11 and 12.

The mounting bracket consists of a straight base plate 1204 and a U-channel clamp 1206. Base plate 1204 is tightly screwed into slotted post 1211 embedded in base 1402 of slide assembly 1400 at hole 1450 by screws 1210.

At the opposite end of base plate 1204, a slot 1100 is disposed that allows screws 1214 to be inserted into the posts embedded into holes 1452 and screwed. The adjustment spring 1202 is disposed between the bottom of the base plate 1204 and the top surface of the base portion 1402. The adjustment spring 1202 forms an angle with the different sides 1220 and 1222, the vertices 1224 of which are engaged with the base plate to bias the mounting bracket away from the slide assembly to press the recording head upwards. . Therefore, the height of the recording head on the slide assembly can be controlled by tightening or loosening the screw 1214. The slot 1100 assists in this adjustment operation by moving the mounting bracket slightly laterally relative to the screw hole 1452 by tightening or loosening the screw 1214.

The tape is moved past the recording head into the cassette by the capstan assembly, the pinch roller assembly and the winding spindle. These will be described in more detail later.

[Capstan Assembly]

Capstan assembly 800 is shown most clearly in the cross-sectional view of FIG. The capstan assembly is a polished stainless steel capstan 802, dual pulleys 804 (large) and 806 integrally attached to the bottom of the capstan by press fit, and rotatably mounted on the bottom of the frame 1340. Bearing 808 and polyurethane retainer 810 for the purpose of assembly.

The bearing is a mold plastic part well made with the acetyl compound of the product name DELRIN 100AF. The bearing consists of a triangular base 820 and a hollow cylindrical portion 822 perpendicular to the base and molded integrally with the base. A portion of the wall of the cylinder is removed to form a notch or opening 830.

In assembly, the capstan 802 and the cylindrical portion 822 are inserted from the bottom through a hole 1370 in the frame 1340 with an opening 830 facing the rear wall of the bottom of the case. The bearing is screwed to the bottom of the frame at the hole positions 1372, 1374 and 1376. At this time, the retainer 810 snaps onto the slot in the top of the capstan. This causes the capstan assembly 800, including the pulleys 804 and 806, to adhere to the frame 1340.

[Pinch Roller Assembly]

Referring to FIG. 2, when the cassette 206 is placed in a case (the top is removed in FIG. 2), the capstan extends across the front of the cassette through the holes 208 in the cassette. Is placed behind the tape. The pinch roller assembly 210 consists of a U-shaped bracket 212 and a rotatable roller 214, and the roller 214 tightens the tape toward the capstan when the case is closed and the recording head 200 is in the recording position. It is arranged to be.

2B illustrates a side view of bracket 212 composed of base 220 and parallel arms 222 and 224.

The roller 214 is a mold rubber that slides on a cylindrical plastic bearing (215, made of DELRIN 100 AF). The bearing is pinned onto the bracket in 228 and 229 in FIG. 2B. The bearing also includes surfaces 217 and 219 that engage the rollers and the inner surfaces of the arms 222 and 224 as the bearing rotates. Plastic bearings do not need to be lubricated and have the property of extending their life despite slow rotation. In prior art devices small amounts of lubrication bearings are used which are often improperly lubricated due to slow rotation. The roller assembly 210 is pivotally mounted by a post through a hole 228 in a bracket embedded in the top of the frame at the hole 1380. The purpose of this will be described in detail in the future, but the base 220 of the bracket extends downward through the arm 224 and into the bottom of the case.

[Winding spindle]

The winding spindle 1000 is shown in detail in cross section in FIG. 10 and interacts with the capstan and pinch roller to move the tape. The winding spindle is the same as the design of a conventional cassette recorder and is mounted on a lower side of the frame 1340 at the hole positions 1384, 1386 and 1356a by a triangular plate 1002 mounted by a post (such as the post 1003). ), A shaft 1004 coupled to the plate 1002 at the bottom, a bottom circumferential plate member engaged with the bottom of the shaft 1004 and the elongated cylindrical member 1010 integrally formed with the bottom and coupled with the shaft near the top. A spindle driver 1006 having a 1008, a pulley 1012 coupled to the driver 1006 by a clutch pad 1014, and a hub 1018 engaged with the outer periphery of the upper portion of the cylindrical member 1010. . The hub is in place by a retainer clip 1020 at the top of the shaft 1004 and a pressing spring 1022 disposed around the portion 1010 between the bottom of the hub 1018 and the top surface of the pulley 1012. Is fixed to. Shaft 1004 and member 1010 extend upward through aperture 1390 of frame 1340. The hub 1018 extends into the memory opening 220 in the rail in the cassette 206 when the cassette is in place. As the capstan and pinch rollers move the tape, the winding spindle moves the rails in the cassette to store the tape by the action of the pulley and clutch.

[Motor, gear case and pulley]

The portable recorder of the present invention uses a conventional 9V alkaline battery 230 as a portable power source. As most clearly shown in FIGS. 2 and 2A, the battery is a side wall adjacent to the sides of the mold walls 1392 and 1394 and the cassette 206 and separated from this side by the wall 1392. It fits into the plane of the case in the compartment in the bottom of the case formed by 1308. When the battery is placed in a compartment, its terminals come into contact with mating terminals 232 and 234 attached to the front wall of the bottom of the case.

Battery terminals are biased towards terminals 232 and 234 by wall with battery slide 236 and spring 238. The battery slide 236 has each portion 240 and a hollow circumferential portion 242 extending therefrom. The top of each part is designed to engage the bottom of the battery 230 through an opening in the wall 1394. A spring is disposed in the cylindrical portion 242 and has one end with a mold wall 1396 spaced from an opening in the wall 1394 so that the spring biases the slide to push the batteries towards the terminals 232 and 234. Combined.

The driving force of the cassette assembly and the winding spindle assembly pulley is provided by the motor and gear assembly 250 of FIG. This motor and gear assembly includes a motor 252 having a drive shaft in the plane of the case parallel to the wall 1308 and a gear for rotating the pulley 256 around an axis parallel to the drive shaft of the motor 252 in the plane of the case. It consists of a case 254. The motor and gear assembly is disposed in a compartment of the case formed by a portion of the side wall 1308, a portion of the rear wall 1310 and an extension 258 of the wall 1332.

The preferred embodiment uses a Namiki Model No. 12CL 2010 motor and a Namiki Model No. LC 12C gear case. Other motors and gear cases with different speeds and different reduction speeds may be used.

The motor and gear assembly is attached to the hole 1398 of the raised portion 1399 of the frame 1340 shown in FIG. 13 by the clamp 320 in FIG. The rise 1399 is threadedly attached at position 1342h to the bottom of the case via a post and partially supported by the wall 1394. This is coupled to the planar portion 1344 with the inclined portion 402 at the junction between the vertical portion 1397 and the planar portion 1344 as clearly shown in FIG. 4 by the vertical portion 1397.

The inclined portion 402 supports the intermediate idler pulley 404 (at position 1391 in FIG. 13) having an axis that traverses both the axis of the gearcase pulley 256 and the axis of the capstan 802. As most clearly shown in FIG. 3, the main pulley belt 322 is stripped from the gear case pulley 256 at the bottom and directly coupled to the pulley 804 of the capstan assembly. The belt 322 wraps around the pulley 804 by 180 ° to 270 °, and the idler on the side facing the front facing the front of the pulley belt 322 around the gear case pulley 256 at the top. Coupling with pulley 404. Therefore, the idler pulley 404 serves to rotate the belt 322 so that the driving force of the gear case pulley 256 is transmitted to the capstan pulley 804 having a rotation axis perpendicular to the axis of the gear case pulley.

The driving force of the capstan pulley 804 is transmitted to the winding spindle pulley 1012 by a second cap 326 coupled around the small capstan pulley 806 and the winding spindle pulley 1012.

[Auto On-Off Switch Unit]

As already mentioned, the recorder of the preferred embodiment is automatically turned on when the case top is closed and automatically turned off when the case top is opened. To achieve this, the power from the battery must be connected to or disconnected from the motor. This is done by the action of the slide assembly including the switch spring 600 mounted to the bracket 1416. As most clearly shown in FIG. 6, the spring 600 consists of a horizontal portion 602 screwed to the bracket 1416 by screws 604 and a diagonal portion 606 extending downwards. . As the slide assembly moves from the remote position to the recording position, the diagonal portion actuates the microswitch 610 attached to the circuit board in the corner region of the bottom of the case formed by the lateral and rear walls 1306 and 1310, respectively. The microswitch 610 is partially electrically connected to the motor and the battery terminal by the circuit board (the battery terminal, the motor, and the recorder head are connected to the circuit board by the wire).

[Slide assembly pole and roller spring device]

5 and 5A, the recording positions and the solid lines of the slide assembly, the recording head and the pinch roller are shown, and their remote positions are shown in dashed lines. The recorder includes a roller spring 502 with one end 504 wound around the slide assembly post 1412. The remainder of the spring consists of a straight portion 506. The end of the straight portion 506 is bent 90 ° to form an extension 510 from the bottom of the case to the second straight portion upward.

The spring is arranged to engage the backside of the pinch roller mounting bracket 210 such that the roller contacts the tape and presses the pinch roller mounting bracket 210 through the opening 830 in the bearing 808 toward the capstan. Bias.

When the case is opened, the slide assembly 1400 moves to the remote position indicated by the dotted line by the action of the spring 1422 and the slide assembly pole member 1410 engages the inner edge of the extension portion 230 of the roller bracket. The roller moves away from the capstan assembly.

The recorder assembly also includes an automatic roller spring release mechanism 520. The mechanism includes a main body 522 that is movably attached by posts embedded in the holes 1342g and 1393 of the frame 1340. The housing includes a cylindrical hollow region arranged to bias the mechanism for spring 524, shown in dashed lines, to move vertically upwards from the bottom of the bottom of the case.

The mechanism also includes a first pole member 530 extending laterally from the body 522 away from the rear wall of the case, and from the body 522 laterally extending in the direction toward the slide assembly adjacent the base wall. Two-poll member 532.

The first pole member 530 is arranged such that when the cassette is in the case, the cassette engages with the first pole member 530 to move the mechanism 520 in the direction regardless of whether the case is open or closed. When the case is opened, the pole member 1410 moves the roller assembly and roller spring to the dashed position, and when the cassette is removed, the mechanism 520 moves upward due to the spring 524. This places the second pole member 532 between the upwardly extending portion 510 of the roller spring and the pitch roller assembly. When the case is closed without the cassette, the motor drives the capstan automatically, but the pinch roller does not engage the capstan. This reduces wear on rollers and roller bearings.

If the cassette is placed in the case before the case is closed, the cassette engages with the first pole member 530 to lower the mechanism and move the second pole member out of the passageway. The action of the slide assembly 1400, the pole members 1410, 530 and 532, the roller spring 502 and the mechanism 520 automatically engages and disengages the pinch rollers and capstans and the rollers when the cassette is not in the case. Interact to extend the life of the capstan bearings.

7 shows a front view of the slide assembly 1400, the recording head assembly (head 200 and bracket 1206), the pinch roller assembly (bracket 210 and roller 214), and the roller spring 502. will be.

Claims (11)

10. A portable device for recording an electrocardiogram signal on a cassette tape over the entire period of operation, wherein the bottom portion 1302 and the bottom portion 1302 can be moved between the open position and the closed position so that the top portion 1302 and the bottom portion 1302 are moved. A flat case 1300 having a top 1362 movably mounted to a bottom, support means 1340 and 1344 mounted to the case 1300 to support the cassette tape 206 in the case 1300 Power supply terminals 232 and 234 included in the case 1300 and electrocardiogram information on the tape 206 to connect to the portable power source 230, and the upper portion 1362 and the bottom of the case 1300. The recording means 200 and 1400 including the recording head moving between the remote non-recording position and the recording position as the opening 1302 is opened and closed, the upper portion 1362 and the bottom portion 1302 of the case 1300 are closed. Pinch to capstan (802) when hit Actuators 1400, 1408, 210 and 212 for forcing the roller 214, a capstan 802 and a rotatable pinch roller for driving the tape 206 between the pinch roller 214 and the capstan 802. Means 214 for moving the recording tape in the cassette past the recording head 200 in response to power from the terminals 232 and 234; 802 and 804 and for connecting the power terminals 232 and 234 to the moving means 250, 252, 254, 256, 322 and 804 when the top 1302 and the bottom 1302 of the case 1300 are closed. Portable ECG recording apparatus comprising a switch means (610). 2. The capstan assembly (800) of claim 1, wherein said moving means comprises a motor means (252), a capstan (802) coupled to said motor means (252) for driving said tape (206). Engages pinch roller means 210, 212 and 214, and pinch roller means 210, 212 and 214 having a portion 214 that can press and rotate the tape 206 towards 802. And bias the pinch roller means toward the tape 206 and capstan 802 when the case 1300 is in the closed position, and the pinch roller 214 when the case 1300 is in the open position. And means (502) coupled to the recording means for moving away from the (206) and capstan (802). 3. The biasing means (502) according to claim 2, wherein the biasing means (502) is directed toward the tape (206) and capstan (802) when the case (1300) is closed and the cassette tape (206) is not present. Means (520, 522, 524, 530 and 532) to prevent biasing. 3. The method of claim 2, wherein the means for moving reduces the speed of the motor means 252 and is selected in a plane about an axis parallel to the axis of the motor means 252 and in a plane parallel to the plane of the case 1300. A gear case 254 for rotating a pulley of a first size and an idler pulley 404 that can rotate about an axis across the gear case pulley 256, wherein the capstan assembly 800 includes the capstan assembly. The idler pulley 404 is attached to the gear case 254 and the capstan pulley 804, including a pulley 804 attached to 802 and rotatable about an axis perpendicular to the flat case 1300. And actuating the partial pull belt (322) to engage the driving force of the motor means (252) to the capstan (802). 5. The device of claim 4, wherein the capstan pulley (804) is considerably larger than the gear case pulley (256). A winding spindle (1000) and an attached pulley (1012), wherein the winding spindle (1000) is characterized by movement of the tape (206) by the capstan (802) and the pinch roller (214). By a pulley belt 326 coupled to the cassette's geared cylinder 2200 to interoperate, wherein the winding spindle pulley 1012 is coupled to a second pulley 1806 attached to the capstan 802. Device driven. 2. The method of claim 1 wherein the recording means comprises a recording head 200 and a slide assembly 1400 slidably mounted to the support means 1340 and 1344 to support the recording head 200. Characterized in that the device. 8. The bracket according to claim 7, wherein the mounting means receives the recording head 200 and one end is fixedly attached to the slide assembly 1400 and the opposite end is variably attached to the bracket 1206 and the attachment portion. And a leaf spring (1204) disposed midway between the bottom of the bracket (1206) and the slide assembly (1400) for biasing the bracket (1206). 8. The apparatus of claim 7, wherein the slide assembly includes a main body portion 1402, an elongated portion 1404 connected to the main body portion 1402, and the tape top portion 1362 movably mounted to the bottom portion 1302. Coupled to the first side of the body portion 1402 adjacent to the bottom portion 1302 and the top portion 1322 of the case 1300, and when the top portion 1322 of the case 1300 is closed; And a roller support (1406) supporting the roller (1408) for engaging and rotating. 8. The device of claim 7, comprising a capstan 802 and a movable pinch roller 214 for driving the tape 206, wherein the slide assembly 1400 is in the closed position when the case 1300 is in a closed position. Engage the pinch roller to bias the pinch roller 214 against 206 and capstan 802 and away from the tape 206 and capstan 802 when the case 1300 is in the open position. And a spring member (502) and a pole member (1410) coupled to the body portion (1402) for moving the pinch roller (214). 11. The housing of claim 10, further comprising means for preventing the spring from biasing the pinch roller towards the capstan when the case is empty, wherein the bias preventing means is movable along an axis between the pressed position and the biased position. 522, bias means for biasing the housing 522 to the bias position, the cassette when the cassette tape 206 is in the case 1300 to maintain the housing 522 in the pressed position Between the roller spring 502 and the pinch roller 214 when the first pole member 530 arranged to engage the tape 206 and the case 1300 are open and the cassette tape 206 is not contained. When the case 1300 is closed without the cassette tape 206, the roller spring 502 is lifted up. Device characterized in that it comprises a second pawl member to prevent the coupling and the pinch roller 214.

Images