CN217455432U - Printing mechanism of medical monitoring equipment and medical monitoring equipment - Google Patents

Abstract

The utility model provides a printing mechanism and medical guardianship equipment of medical guardianship equipment. The printing mechanism includes: a support plate; a support arm which is L-shaped and is rotatably arranged on the support plate at one end, and a printing head mounting part provided with a printing head is arranged at the other end; the movable rack assembly comprises a rack, a rubber press roller which is arranged at the front end of the rack and is used for being in pressure contact with the printing head, a printing paper bin which is arranged on the rack, and a driving mechanism which is arranged on the rack and is used for driving the rubber press roller to rotate; wherein guide grooves having a curved profile are formed on the frame, and guide shafts extending from the head mount are movably fitted in the respective guide grooves to restrict a relative position and a pressing force between the print head and the rubber platen roller. According to the utility model discloses a printing mechanism of medical monitoring equipment can ensure printing quality and can not occupy too big space.

Description

Printing mechanism of medical monitoring equipment and medical monitoring equipment

Technical Field

The utility model relates to a printing mechanism of medical monitoring equipment and medical monitoring equipment comprising the printing mechanism.

Background

Medical monitoring devices, such as fetal monitors, electrocardiographs, defibrillators, or ultrasound diagnostics, typically include a host computer and a printing mechanism disposed within the host computer. Taking a printing mechanism of a fetal monitor as an example, when the printing mechanism works, a rubber pressing roller driven by a stepping motor rotates at a preset speed to drag printing paper to pass through a thermal printing head, so that a curve representing the vital signs of a fetus is recorded on the thermal printing paper. In the existing printing mechanism, the stepping motor and the rubber platen roller are mounted on different parts to form a separable structure. Generally, gears are installed at the shaft ends of the stepping motor and the rubber platen, respectively, and the stepping motor rotates the rubber platen by transmitting motion through engagement of the gears, and thus drags the printing paper pressed between the rubber platen and the printing head. When the printing mechanism prints, the rubber compression roller and the printing head need to be pressed together with proper pressure, and the printing paper passing through the rubber compression roller and the printing head are ensured to be accurately attached. Usually, the rubber roller is used as a movable component to open and close along with the printing paper bin, the mounting frame (printing head mounting part) of the printing head is fixed on the shell of the medical monitoring device, and the printing head is pressed by a group of springs and can move in a small range (floating design). When the rubber press roller is buckled with the printing head, the spring provides pressing force to enable the rubber press roller and the printing head to be tightly attached. In such a conventional structure, the elasticity of the spring changes with the use of the printing mechanism, resulting in a change in the pressing force applied between the rubber platen roller and the print head, so that the print quality of the print head on the print paper deteriorates. In addition, the set of springs pressing against the print head also takes up a large space of the medical monitoring device.

Accordingly, there is a need for improvements in the printing mechanisms for medical monitoring devices in the prior art.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to overcome the above-mentioned drawbacks of the prior art and to provide a printing mechanism for a medical monitoring device, which can overcome at least one of the above-mentioned drawbacks of the prior art.

According to an aspect of the utility model, a provide a printing mechanism of medical guardianship equipment, a serial communication port, printing mechanism includes:

a support plate;

a support arm which is L-shaped and one end of which is rotatably arranged on the support plate, wherein the other end of the support arm is provided with a printing head mounting part on which a printing head is arranged; and

the movable rack assembly is movably arranged on the supporting plate and is positioned between the supporting plate and the supporting arm, and comprises a rack, a rubber press roller, a printing paper bin and a driving mechanism, wherein the rubber press roller is installed at the front end of the rack, close to the outer side of the medical monitoring device, and is used for being in pressure contact with the printing head;

wherein the frame is formed with guide grooves having a curved profile, and guide shafts extending from both sides of the head mount are movably fitted in the respective guide grooves to limit a relative position and a pressing force between the print head and the rubber platen.

Preferably, the guide groove includes a first guide groove and a second guide groove oppositely provided on the frame, and the first guide groove and the second guide groove have a curved profile gradually rising from a front end to a rear end.

Preferably, the leading ends of the first guide groove and the second guide groove are formed with a recess into which the print head is press-fitted to the rubber platen roller when the guide shaft is moved.

Preferably, the length of the first and second guide slots is selected to be equal to the maximum travel of the movable frame assembly being pulled out of the housing of the medical monitoring device, and the height of the first and second guide slots is selected to determine the maximum angle of rotation of the print head and the support arm.

Preferably, the frame includes first and second mounting plates disposed opposite to each other, and first and second connecting rods fixedly connecting the first and second mounting plates together, the first guide groove being formed on the first mounting plate and the second guide groove being formed on the second mounting plate.

Preferably, the guide shaft is provided with rolling bearings, by which the guide shaft is movably fitted in the respective guide grooves.

Preferably, the printing mechanism of the medical monitoring device is further provided with a return spring, and the return spring tends to enable the printing head to rotate and press on the rubber compression roller.

Preferably, the driving mechanism comprises a first belt wheel fixedly mounted at one end of the rubber press roller, a motor mounted on the frame, a second belt wheel mounted on a rotating shaft of the motor, and a synchronous belt mounted on the first belt wheel and the second belt wheel so as to drive the rubber press roller to rotate when the motor operates.

Preferably, the motor is disposed at a rear end of the housing proximate an interior side of the medical monitoring device.

Preferably, the rubber pressure roller is rotatably supported by bearings at the front ends of the first mounting plate and the second mounting plate close to the outer side of the medical monitoring device, and the motor is mounted at the tail end of the first mounting plate close to the inner side of the medical monitoring device at a distance from the rubber pressure roller along the longitudinal direction of the first mounting plate.

Preferably, the first and second pulleys are disposed adjacent the first mounting plate.

Preferably, the first mounting plate, the second mounting plate, the first connecting rod and the second connecting rod are metal or alloy members that are connected together to form a rigid frame.

Preferably, the medical monitoring device is a fetal monitor.

According to another aspect of the present invention, there is provided a medical monitoring device, wherein the medical monitoring device comprises the printing mechanism of the medical monitoring device as described above.

According to the printing mechanism of the medical monitoring equipment, the design of the curve outline of the guide groove ensures that the position is accurate when the printing head is matched with the rubber compression roller, and the rubber compression roller is subjected to proper pressure and is deformed properly, so that the printing quality is ensured; on the other hand, the rotation range of the printing head and the supporting arm is limited, so that the layout of the medical monitoring equipment is not influenced and the overlarge space of the medical monitoring equipment is not occupied.

Drawings

Fig. 1 schematically shows in perspective view a printing mechanism of a medical monitoring device according to the invention;

fig. 2 schematically shows, in another perspective view, a printing mechanism of a medical monitoring device according to the invention, wherein the motor has been detached from the frame;

fig. 3 schematically illustrates, in another perspective view, a printing mechanism of a medical monitoring device according to the present invention, wherein the motor and the support arm have been detached from the frame;

fig. 4 schematically shows in perspective view a movable frame assembly of a printing mechanism of a medical monitoring device according to the present invention, wherein a motor and a rubber pressure roller are mounted on the frame;

fig. 5 schematically shows in a perspective view a movable frame assembly of a printing mechanism of a medical monitoring device according to the present invention, wherein a rubber compression roller and a printing paper bin are mounted on the frame;

fig. 6 schematically shows in perspective view a support arm and a print head mounting of a printing mechanism of a medical monitoring device according to the invention;

FIG. 7 is a side view of the structure shown in FIG. 6; and

fig. 8 is a side view of the structure shown in fig. 2, but with the front trim panel removed.

Detailed Description

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the drawings are only for the purpose of illustrating the invention and do not constitute a limitation on the invention.

Fig. 1 schematically shows in a perspective view a printing mechanism of a medical monitoring device according to the invention, fig. 2 schematically shows in another perspective view a printing mechanism of a medical monitoring device according to the invention, wherein the motor has been detached from the frame, fig. 3 schematically shows in another perspective view a printing mechanism of a medical monitoring device according to the invention, wherein the motor and the support arm have been detached from the frame, fig. 4 schematically shows in a perspective view a movable frame assembly of a printing mechanism of a medical monitoring device according to the invention, wherein the motor and the rubber pinch roller are mounted on the frame, fig. 5 schematically shows in a perspective view a movable frame assembly of a printing mechanism of a medical monitoring device according to the invention, wherein the rubber pinch roller and the printing paper magazine are mounted on the frame, fig. 6 schematically shows in perspective view a support arm and a print head mounting portion of a printing mechanism of a medical monitoring device according to the invention, and fig. 7 is a side view of the structure shown in fig. 6. As shown in fig. 1-7, a printing mechanism 1 of a medical monitoring device according to the present invention generally comprises a support plate (or base plate) 3, the support plate 3 being typically mounted on a housing of the medical monitoring device (not shown), such as a fetal monitor. According to the utility model discloses a printing mechanism 1 of medical monitoring equipment still includes support arm 5. In the preferred embodiment, the support arm 5 is generally L-shaped, the support arm 5 being rotatably mounted at one end 5a to the support plate 3, the support arm 5 being mounted at its other end 5b with a print head mount 7, and a print head 9, such as a thermal print head, being mounted on the print head mount 7. In fig. 1, the print head is not visible because it is mounted on the lower side of the print head mounting portion 7. The print head is in wired or wireless electrical communication with a host of the medical monitoring device to receive signals from the host for printing operations. The printing mechanism 1 of the medical monitoring device according to the present invention further comprises a movable frame assembly 11, the movable frame assembly 11 being movably arranged on the support plate 3 and being located in the space between the support plate 3 and the support arm 5.

As shown in fig. 4 and 5, the movable frame assembly 11 includes a frame 13, and the frame 13 includes a first mounting plate 15 and a second mounting plate 17 disposed opposite to each other, and a first connecting rod 19 and a second connecting rod 21 fixedly connecting the first mounting plate 15 and the second mounting plate 17 together. In a preferred embodiment, the first mounting plate 15, the second mounting plate 17, the first connecting rod 19 and the second connecting rod 21 are all metal members such as aluminum or other lightweight metal or alloy members that are formed separately and then connected together by fasteners such as screws, so that the frame 13 is formed as a highly rigid metal frame. It should be understood that the first mounting plate 15, the second mounting plate 17, the first connecting rod 19 and the second connecting rod 21 may also be integrally cast from metal. Of course, the first mounting plate 15, the second mounting plate 17, the first connecting rod 19 and the second connecting rod 21 may also be integrally injection molded from plastic. The movable carriage assembly 11 also includes a printing paper hopper 23 mounted between the first mounting plate 15 and the second mounting plate 17 for receiving printing paper 25. In fig. 4, the printing paper deck mounted on the frame 13 is not shown.

The movable rack assembly 11 further comprises a rubber compression roller 27, two ends of which are rotatably supported on the first mounting plate 15 and the second mounting plate 17, the rubber compression roller 27 is rotatably supported at the front ends of the first mounting plate 15 and the second mounting plate 17 close to the outer side of the medical monitoring device through bearings, and a first belt wheel 29 is fixedly mounted at one end of the rubber compression roller 27. The movable frame assembly 11 further includes a motor 31 mounted on the first mounting plate 15 at a distance from the rubber press roller 27 in the longitudinal direction of the first mounting plate 15, and a second pulley (not visible) is mounted on a rotating shaft of the motor 31. A timing belt 33 is installed on the first pulley 29 and the second pulley so that the rubber press roller 27 is rotated by the second pulley, the timing belt 33 and the first pulley 29 when the motor is operated. Thus, according to the present invention, the rubber platen roller 27, the motor 31, and the timing belt 33 connecting the rubber platen roller 27 and the motor 31 are all mounted on the frame 13, and even when the movable frame assembly 11 is extracted from the housing of the medical monitoring apparatus to take and place printing paper and then inserted into the housing of the medical monitoring apparatus, the rubber platen roller 27, the motor 31, and the timing belt 33 move together with the frame 13, but their mutual positions are maintained, so that their positioning accuracy can be ensured, and the printing mechanism can be operated in balance without generating noise or with significantly reduced noise.

Preferably, the motor 31 is disposed at the rear end of the first mounting plate 15 adjacent the inside of the medical monitoring device, which allows the movable housing assembly 11 to be formed with a generally uniform thickness and thus have a relatively flat, regular shape. As a result, the printing mechanism can have a relatively compact, orderly layout. More preferably, the first pulley 29, the second pulley and the motor 31 are disposed adjacent to the first mounting plate 15, so that the overall structure is more compact and occupies as little space as possible. The dimensions of the first and second mounting plates 15, 17 are selected so that the rubber press roller 27, the first pulley on the rubber press roller 27, the timing belt 33, the motor 31, and the second pulley on the motor 31 are all located inside at least one of the first and second mounting plates 15, 17, ensuring that no moving parts protrude or are left bare outside the frame 13. Although the first and second mounting plates 15 and 17 may have the same length, in a preferred embodiment, since the second mounting plate 17 does not support the motor 31, the length of the second mounting plate 17 may be shorter than the length of the first mounting plate 15, which may reduce the amount of material used and the weight of the rack 13. First and second guide grooves 35 and 37 extending in the longitudinal direction and having a curved profile are formed on the first and second mounting plates 15 and 17, respectively.

As shown in fig. 1 and 3, a pair of oppositely disposed mounting seats 39 are further provided on the support plate 3, each mounting seat 39 is formed with a mounting hole 39a, and a first boss 39b is further formed on the outer side of each mounting seat 39. As shown in fig. 6 and 7, the substantially L-shaped support arm 5 is formed with protruding fitting shafts 5c on both sides of the end portion 5a, and second bosses 5d on both sides of a main body portion (i.e., a portion to be located above the printing paper deck) of the substantially L-shaped support arm 5. Guide shafts 7a extend outward from both sides of the head mount 7.

At the time of fitting, fitting shafts 5c formed at the end portions 5a of the support arms 5 are rotatably fitted in fitting holes 39a on the mount 39, and guide shafts 7a extending outward from both sides of the head mount 7 are movably fitted in the first guide grooves 35 on the first mount plate 15 and the second guide grooves 37 on the second mount plate 17, respectively. Preferably, each guide shaft 7a is fitted with a rolling bearing, through which the guide shaft 7a is fitted in a first guide groove 35 on the first mounting plate 15 and a second guide groove 37 on the second mounting plate 17. Further, one end of the return spring 41 is fitted on the first boss 39b on the mount 39, and the other end of the return spring 41 is fitted on the second boss 5d on the support arm 5.

Fig. 8 is a side view of the structure shown in fig. 2, but with the front trim panel removed. As shown in fig. 8, the first guide groove 35 and the second guide groove 37 have a curved profile gradually rising from the front end (the end close to the rubber platen 27) to the rear end so that the print head mount 7 in which the print head 9 is mounted is lifted away from the rubber platen 27 against the action of the return spring 41 as the movable frame assembly 11 is pulled out from the housing of the medical monitoring apparatus (in the left direction in fig. 7). A recess is formed at the front ends of the first guide groove 35 and the second guide groove 37 (only a recess 37a formed at the front end of the second guide groove 37 is shown in fig. 8). When the movable frame member 11 is pushed into the housing of the medical care apparatus (the movable frame member 11 is pushed in the right direction in fig. 7), the guide shaft 7a on the print head mounting section 7 in which the print head 9 is mounted is moved by the return spring 41 from the first guide groove 35 and the second guide groove 37 into the recesses at their ends, at which position the print head 9 is pressed onto the rubber platen roller 27, so that the rubber platen roller 27 is subjected to a desired pressure and is deformed as desired.

Preferably, the length L of the first and second guide slots 35, 37 is selected to be equal to the maximum travel of the movable frame assembly 11 that can be pulled out of the housing of the medical monitoring device. In the present application, the lengths of the first guide groove 35 and the second guide groove 37 refer to the shortest straight distance in the horizontal direction between when the movable frame member 11 is completely pulled out from the housing of the medical monitoring apparatus and when the movable frame member 11 is completely pushed into the housing of the medical monitoring apparatus, the guide shaft 7a on the head mount 7. The height H of the first guide slot 35 and the second guide slot 37 is chosen to determine the maximum rotation angle of the print head 9 and the support arm 5. In the present application, the heights of the first guide groove 35 and the second guide groove 37 refer to the shortest straight distance in the vertical direction between when the movable frame member 11 is completely pulled out from the housing of the medical monitoring apparatus and when the movable frame member 11 is completely pushed into the housing of the medical monitoring apparatus, the guide shaft 7a on the print head mount 7.

In a normal state, the movable frame assembly 11 is pushed into the housing of the medical monitoring device in the space between the support plate 3 and the support arm 5, so that the rubber platen roller 27 is in pressure contact with the print head on the print head mount 7. The printing paper 16 passes between the rubber platen roller 27 and the print head. When the printing mechanism operates, the motor 31 drives the rubber compression roller 27 to rotate through the second belt wheel, the motor 31 and the first belt wheel 29, so that the thermal printing paper is dragged to pass through the printing head, and the vital sign curve of the fetus is recorded on the printing paper.

When the movable frame assembly 11 needs to be drawn out for taking and placing the printing paper, the first guide slot 35 on the first mounting plate 15 and the second guide slot 37 on the second mounting plate 17 of the frame 13 allow the movable frame assembly 11 to move outwards relative to the support arm 5 and the print head mounting portion 7, so that the printing paper cartridge can be moved to the outside of the housing of the medical monitoring device to facilitate taking and placing the printing paper.

According to the utility model discloses, the motion trail of beating printer head has been confirmed through the curve profile of first guiding groove and second guiding groove to beat printer head and rubber compression roller's relative position through the restriction, ensure relative position and the pressfitting power between the two. When the movable frame assembly is pulled outward, the movable frame assembly with the rubber platen roller moves along the first guide groove and the second guide groove, and the printing head slightly rotatably lifts off the rubber platen roller along the first guide groove and the second guide groove along with the movement of the movable frame assembly. When the movable frame assembly is pushed inward, the guide shaft on the print head mounting part moves into the concave parts at the ends of the first guide groove and the second guide groove under the action of the return spring, and the rubber press roller and the print head are just pressed in place, so that proper pressing force is obtained. The curved profile design of the first guide groove and the second guide groove ensures that the position is accurate when the printing head is matched with the rubber compression roller, and the rubber compression roller is subjected to proper pressure and is deformed properly, so that the printing quality is ensured; on the other hand, the rotation range of the printing head and the supporting arm is limited, so that the layout of the medical monitoring equipment is not influenced and the overlarge space of the medical monitoring equipment is not occupied.

While the invention has been described in detail in connection with the preferred embodiments thereof, it should be understood that this detailed description is only for the purpose of explanation and is not to be construed as a limitation of the invention. For example, although in the preferred embodiment described above the drive mechanism for driving the rubber press roller in rotation comprises a motor, a first pulley, a second pulley and a timing belt, it will be appreciated that the drive mechanism for driving the rubber press roller in rotation may take other configurations, including, for example, a frame-mounted motor that drives a rubber press roller also mounted on the frame by gear engagement. The scope of the present invention is defined by the claims.

Claims (14)

1. A printing mechanism for a medical monitoring device, the printing mechanism comprising:

a support plate (3);

a support arm (5) which is L-shaped and one end of which is rotatably arranged on the support plate (3), wherein the other end of the support arm (5) is provided with a printing head installation part (7), and a printing head (9) is arranged on the printing head installation part (7); and

a movable frame assembly (11) movably arranged on the supporting plate (3) and positioned between the supporting plate (3) and the supporting arm (5), wherein the movable frame assembly (11) comprises a frame (13), a rubber compression roller (27) which is arranged at the front end of the frame (13) close to the outer side of the medical monitoring device and is used for being in pressure contact with the printing head (9), a printing paper bin (23) which is arranged on the frame (13), and a driving mechanism which is arranged on the frame (13) and is used for driving the rubber compression roller (27) to rotate;

wherein the frame (13) is formed with guide grooves having a curved profile, and guide shafts (7a) extending from both sides of the head mount (7) are movably fitted in the respective guide grooves to restrict a relative position and a pressing force between the print head (9) and the rubber platen roller (27).

2. Printing mechanism for medical monitoring devices according to claim 1, wherein the guiding slots comprise a first guiding slot (35) and a second guiding slot (37) oppositely arranged on the frame (13), the first guiding slot (35) and the second guiding slot (37) having a curved profile gradually rising from the front end to the rear end.

3. The printing mechanism of medical monitoring apparatus according to claim 2, wherein the leading ends of the first guide groove (35) and the second guide groove (37) are formed with a recess (37a), and the print head (9) is press-fitted onto the rubber platen roller (27) when the guide shaft (7a) is moved into the recess (37 a).

4. Printing mechanism for a medical monitoring device according to claim 2, wherein the length (L) of the first guide slot (35) and the second guide slot (37) is chosen to be equal to the maximum travel of the movable carriage assembly (11) pulled out of the housing of the medical monitoring device, and the height (H) of the first guide slot (35) and the second guide slot (37) is chosen to determine the maximum rotation angle of the print head (9) and the support arm (5).

5. The printing mechanism of medical monitoring equipment as defined in claim 2, wherein the frame (13) comprises a first mounting plate (15) and a second mounting plate (17) arranged opposite each other, and a first connecting rod (19) and a second connecting rod (21) fixedly connecting the first mounting plate (15) and the second mounting plate (17) together, the first guiding slot (35) being formed on the first mounting plate (15) and the second guiding slot (37) being formed on the second mounting plate (17).

6. Printing mechanism for medical monitoring devices according to claim 1, characterized in that the guiding shaft (7a) is provided with rolling bearings, by means of which the guiding shaft (7a) is movably fitted in the respective guiding grooves.

7. Printing mechanism for medical monitoring devices according to claim 1, characterized in that a return spring (41) is provided, said return spring (41) tending to rotate and press said print head (9) against said rubber pressure roller (27).

8. Printing mechanism for medical monitoring devices according to claim 5, wherein the driving mechanism comprises a first pulley (29) fixedly mounted at one end of the rubber pressure roller (27), a motor (31) mounted on the frame (13), a second pulley mounted on the rotation shaft of the motor (31), and a timing belt (33) mounted on the first pulley (29) and the second pulley for rotating the rubber pressure roller (27) when the motor (31) is operated.

9. Printing mechanism for a medical monitoring device according to claim 8, wherein the motor (31) is arranged at the rear end of the housing (13) near the inside of the medical monitoring device.

10. The printing mechanism of the medical monitoring device as claimed in claim 8, wherein the rubber pressure roller (27) is rotatably supported by bearings at the front ends of the first mounting plate (15) and the second mounting plate (17) near the outside of the medical monitoring device, and the motor (31) is mounted at the rear end of the first mounting plate (15) near the inside of the medical monitoring device at a distance from the rubber pressure roller (27) along the longitudinal direction of the first mounting plate (15).

11. The printing mechanism of a medical monitoring device as defined in claim 8, wherein the first pulley (29) and the second pulley are disposed adjacent to the first mounting plate (15).

12. Printing mechanism for medical monitoring devices according to claim 5, wherein the first mounting plate (15), the second mounting plate (17), the first connecting rod (19) and the second connecting rod (21) are metal or alloy components, which are connected together to form a rigid frame.

13. The printing mechanism of the medical monitoring device of claim 1, wherein the medical monitoring device is a fetal monitor.

14. A medical monitoring device comprising a printing mechanism of the medical monitoring device according to any of claims 1-13.

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