CN217863414U - 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 movable frame assembly movably disposed on the support plate and including a frame; a printing paper bin mounted on the frame so as to move with the movable frame assembly; at least one set of spaced apart bosses disposed on a top surface of the body of the support plate along a direction of movement of the moveable carriage assembly; and a guide rod passing through the hole defined by each set of spaced-apart bushings and fixed at both ends to the bottom of the housing, the guide rod guiding and moving with the movable housing assembly; and a damping bracket is arranged between adjacent shaft sleeves in each group of shaft sleeves, is in contact with the guide rod and applies upward acting force vertical to the moving direction of the guide rod. According to the utility model discloses a printing mechanism of medical monitoring equipment can ensure that printing mechanism can both fix a position and open and shut the action smoothly with high accuracy at the horizontal work with hang the during operation printing paper storehouse.

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 the printing mechanism of the fetal monitor as an example, the laminated thermal printing paper is usually loaded in a printing paper bin, and when the printing mechanism is in operation, a rubber pressure roller driven by a stepping motor rotates at a preset speed to drag the printing paper past a thermal printing head, so as to record a curve representing the vital signs of the fetus on the thermal printing paper. The precondition for ensuring accurate printing is the stability of the printing paper bin, which means that the printing paper bin needs to have proper damping when moving, needs proper force to maintain the placing position after being placed in place, and does not shake and shift. In the existing printing mechanism, two wings of a paper bin of a drawer-type printer are provided with convex sliding rails, and the sliding rails are matched with pulleys on medical monitoring equipment to realize the forward and backward sliding of the paper bin. The outer edge of the printing paper bin sliding rail and the wall of the medical monitoring equipment shell limit the printing paper bin. Because the printing paper bin needs to be pushed and pulled frequently, the outer edge of the printing paper bin sliding rail and the wall of the medical monitoring equipment shell cannot be matched too tightly, otherwise, the sliding damping is too large when the printing paper bin is pushed and pulled, and the printing paper bin is easy to shake in the machine body due to the loose matching. When the medical monitoring device works in a vertically suspended state, due to the action of gravity, the printing paper bin cannot be positioned at any position on the guide rail in a natural state, but directly and completely slides out of the medical monitoring device shell. In addition, when the printing paper bin moves, the sliding damping is mainly caused by the sliding friction between the outer side wall surface of the printing paper bin and the inner side wall surface of the medical monitoring device shell, but the matching cannot be too tight, the moving state of the printing paper bin is unstable during the movement, the sliding friction is difficult to control, and poor hand feeling is brought to a user during the operation of the user.

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 movable frame assembly movably disposed on the support plate, the movable frame assembly including a frame; and

a printing paper bin for containing printing paper, the printing paper bin being mounted on the frame so as to move with the movable frame assembly;

the printing mechanism further includes:

at least one set of spaced apart bosses disposed on a top surface of the body of the support plate along a direction of movement of the moveable carriage assembly; and

a guide rod passing through a hole defined by each set of spaced bushings and fixed at both ends to the bottom of the frame, the guide rod guiding and moving with the movable frame assembly;

and a damping bracket is arranged between adjacent shaft sleeves in each group of shaft sleeves, is in contact with the guide rod and applies an upward acting force to the guide rod vertical to the moving direction of the guide rod.

Preferably, two elongate openings are formed in each set of said sleeves between adjacent sleeves, thereby defining a resilient beam between said two elongate openings, said damping bracket being provided on said resilient beam.

Preferably, the damping bracket is V-shaped, U-shaped or semi-circular.

Preferably, a guide groove is provided on the body at a position where the guide bar passes through but the boss is not provided, the guide bar being partially received in the guide groove while passing through the guide groove.

Preferably, the body is further provided with through holes at positions where the guide grooves are located at intervals, the printing mechanism further comprises a rubbing strip, the rubbing strip comprises a planar carrier and a pad block convexly formed on the carrier, and the pad block penetrates through the through holes from the bottom of the body and protrudes towards the top of the body, so that the guide rod presses the pad block when contacting with the pad block.

Preferably, the hole defined by the boss is open to the bottom surface of the body, and the pad also passes through the through hole below the boss.

Preferably, a hollowed-out portion is formed below the top surface of the pad.

Preferably, the printing mechanism further comprises:

a support arm provided on the support plate, the support arm being provided with a print head; and

the driving mechanism is used for driving the rubber compression roller to rotate;

wherein the movable frame assembly further comprises a rubber pressure roller which is arranged at the front end of the frame close to the outer side of the medical monitoring device and is used for being in pressure contact with the printing head, and the movable frame assembly is positioned between the support plate and the support arm.

Preferably, the printing mechanism further comprises a locking mechanism, wherein the locking mechanism comprises elastic clamping jaws and locking columns, the elastic clamping jaws are arranged at the rear end of the frame in pairs and oppositely, the elastic clamping jaws are arranged on the supporting plate correspondingly, the elastic clamping jaws tend to be clamped together, the elastic clamping jaws are expanded under the action of external pushing force to receive the locking columns and tightly clamp the locking columns, and the elastic clamping jaws are separated from the locking columns under the action of external pulling force.

Preferably, the driving mechanism comprises a first belt wheel fixedly mounted at one end of the rubber compression 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 compression roller to rotate when the motor runs, and the motor is arranged at the tail end of the frame close to the inner side of the medical monitoring device.

Preferably, the support arm is L-shaped, the support arm being rotatably mounted at one end portion thereof on the support plate, the support arm being mounted at the other end portion thereof with a print head mounting portion on which the print head is mounted.

Preferably, the frame includes a first mounting plate and a second mounting plate which are arranged oppositely, and a first connecting plate and a second connecting plate which fixedly connect the first mounting plate and the second mounting plate together, the first mounting plate and the second mounting plate are respectively formed with a first guide groove and a second guide groove which extend in the longitudinal direction, and both end portions of the print head mounting part are movably supported in the first guide groove and the second guide groove.

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 utility model discloses a printing mechanism of medical monitoring equipment can remove for portable frame subassembly (promptly, prints the paper storehouse) and provides profitable damping force, not only provides good feeling when the paper storehouse is printed in user's push-and-pull, makes to print the paper storehouse and can not rock moreover, and then ensures that printing mechanism can both fix a position and open and shut the action smoothly with high accuracy at horizontal work and the during operation printing the paper storehouse of hanging.

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 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. 3 schematically shows in perspective view a printing mechanism of a medical monitoring device according to the present invention, wherein the support arm and the print head mounting portion and the rubber platen are removed to clearly show the printing paper compartment;

FIG. 4 is a top view of the structure shown in FIG. 3;

FIG. 5 is an enlarged fragmentary view of FIG. 4 showing the locking post about to be gripped by the resilient jaws;

FIG. 6 is an enlarged fragmentary view of FIG. 4 showing the locking post having been gripped by the resilient jaws to achieve a locked condition;

fig. 7 shows schematically in a perspective view a support plate of a printing mechanism of a medical monitoring device according to the invention;

FIG. 8 is the same perspective view as FIG. 7, wherein two guide rods are respectively passed through bosses provided on the support plate;

FIG. 9 is an enlarged partial view of FIG. 8; and

fig. 10 schematically shows in perspective view a rub strip of a printing mechanism of a medical monitoring device according to the present invention.

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 a printing mechanism of a medical monitoring device according to the invention in a perspective view. As shown in fig. 1, 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 a medical monitoring device (not shown), such as a fetal monitor. The printing mechanism 1 of the medical monitoring device according to the present invention further comprises a support arm 5, in the preferred embodiment, the support arm 5 is substantially L-shaped, the support arm 5 is rotatably mounted on the support plate 3 at one end 5a, the support arm 5 is mounted with a print head mounting portion 7 at the other end 5b thereof, and a print head such as a thermal print head is mounted on the print head mounting portion 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. According to the utility model discloses a printing mechanism 1 of medical monitoring equipment still includes portable frame subassembly 9, portable frame subassembly 9 is movably set up on bearing plate 3 and is arranged in the space between bearing plate 3 and support arm 5.

Fig. 2 schematically shows in a perspective view a movable frame assembly of a printing mechanism of a medical monitoring device according to the invention, wherein a motor and a rubber pressure roller are mounted on the frame. As shown in fig. 2, the movable frame assembly 9 includes a frame 11, and the frame 11 includes a first mounting plate 13 and a second mounting plate 15 that are oppositely disposed, and a first connecting plate 17 and a second connecting plate 19 that fixedly connect the first mounting plate 13 and the second mounting plate 15 together. In the preferred embodiment, the first mounting plate 13, the second mounting plate 15, the first connecting plate 17 and the second connecting plate 19 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 11 is formed as a highly rigid metal frame. It should be understood that the first mounting plate 13, the second mounting plate 15, the first connecting plate 17 and the second connecting plate 19 may also be integrally cast from metal. Of course, the first mounting plate 13, the second mounting plate 15, the first connecting plate 17 and the second connecting plate 19 may also be integrally injection molded from plastic. The movable carriage assembly 9 also includes a printing paper hopper 16 mounted between the first mounting plate 13 and the second mounting plate 15 for receiving printing paper 18. In fig. 2, the printing paper deck 16 mounted on the frame 11 is not shown.

The movable rack assembly 9 further comprises a rubber compression roller 21 with two ends rotatably supported on the first mounting plate 13 and the second mounting plate 15, the rubber compression roller 21 is rotatably supported at the front ends of the first mounting plate 13 and the second mounting plate 15 close to the outer side of the medical monitoring device through bearings, and a first belt wheel 23 is fixedly mounted at one end of the rubber compression roller 21. The movable frame assembly 9 further comprises a motor 25 mounted on the first mounting plate 13 at a distance from the rubber press roller 21 in the longitudinal direction of the first mounting plate 13, and a second pulley (not visible in the drawings) is mounted on the rotating shaft of the motor 25. A timing belt 27 is mounted on the first pulley 23 and the second pulley so that the rubber press roller 21 is rotated by the second pulley, the timing belt 27 and the first pulley 23 when the motor is operated. Thus, according to the present invention, the rubber pressing roller 21, the motor 25, and the timing belt 27 connecting the rubber pressing roller 21 and the motor 25 are all mounted on the frame 11, and even when the movable frame assembly 9 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 pressing roller 21, the motor 25, and the timing belt 27 move together with the frame 11, but their mutual positions remain unchanged, so that their positioning accuracy can be ensured, and the printing mechanism can be operated in balance without generating noise or significantly reducing noise.

Preferably, the motor 25 is disposed at the rear end of the first mounting plate 13 near the inside of the medical monitoring device, which allows the movable housing assembly 9 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 23, the second pulley and the motor 25 are disposed adjacent to the first mounting plate 13, so that the overall structure is more compact and occupies as little space as possible. The dimensions of the first mounting plate 13 and the second mounting plate 15 are selected such that the rubber press roller 21, the first pulley on the rubber press roller 21, the timing belt 27, the motor 25, and the second pulley on the motor 25 are all located inside at least one of the first mounting plate 13 and the second mounting plate 15, ensuring that no moving parts protrude or are left bare outside the frame 11. Although the first and second mounting plates 13 and 15 may have the same length, in a preferred embodiment, since the second mounting plate 15 does not support the motor 25, the length of the second mounting plate 15 may be shorter than the length of the first mounting plate 13, which may reduce the amount of material used and the weight of the rack 11. Although in the preferred embodiment the drive mechanism for driving the rubber press roller in rotation comprises an electric 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 electric motor that drives a rubber press roller also mounted on the frame by gear engagement.

First and second guide grooves 29, 31 extending in the longitudinal direction are formed on the first and second mounting plates 13, 15, respectively, and both end portions 7a, 7b of the head mount 7 are movably supported in the first and second guide grooves 29, 31, respectively.

Fig. 3 schematically shows in perspective view a printing mechanism of a medical monitoring device according to the present invention, wherein the support arm and the print head mounting portion and the rubber press roller are removed to clearly show the printing paper cartridge; fig. 4 is a top view of the structure shown in fig. 3. The printing paper magazine 16 for accommodating printing paper 18 is clearly shown in fig. 3, the printing paper magazine 16 may be injection molded from plastic, and the printing paper magazine 16 is fixedly supported on the frame 11, for example by clipping, screws or other fastening means, and may be moved together with the frame 11 or the movable frame assembly 9.

According to the utility model discloses a printing mechanism 1 of medical guardianship equipment still includes locking mechanism, and locking mechanism is including setting up the first locking part 33 in the second connecting plate 19 (i.e. frame 11 towards the inboard rear end of medical guardianship equipment's casing) outside of frame 11 to and set up the second locking part 35 on bearing plate 3. When the housing 11 with the cartridge 16 therein is pushed into the housing of the medical monitoring device, the first locking member 33 and the second locking member 35 can be engaged with each other by the external pushing force, thereby locking the movable housing assembly 9 and the cartridge 16 in place in the housing of the medical monitoring device. When the housing 11 containing the printing paper cartridge 16 is pulled outward from the housing of the medical monitoring device, the first locking member 33 and the second locking member 35 can be disengaged by an external pulling force, so that the movable housing assembly 9 and the printing paper cartridge 16 are pulled outward from the housing of the medical monitoring device.

In the preferred embodiment shown in fig. 3 and 4, the first locking member 33 comprises a pair of oppositely disposed resilient jaws 37, the resilient jaws 37 being intended to clamp together. The second locking part 35 comprises a locking post 39 arranged on the support plate 3 in correspondence with the resilient jaw 37. When the housing 11 containing the cartridge 16 is pushed into the housing of the medical monitoring device, the resilient fingers 37 open under the influence of an external force to receive the locking posts 39 and then tightly grip the locking posts 39, thereby locking the cartridge 16 in place in the housing of the medical monitoring device, as shown in fig. 5 and 6. When the frame 11 with the printing paper cartridge 16 is pulled outward from the housing of the medical monitoring device, the elastic claws 37 are pulled away from the locking posts 39, thereby pulling the printing paper cartridge 16 outward from the housing of the medical monitoring device.

In order for the locking column 39 to be securely locked by the pair of elastic claws 37, each elastic claw 37 is formed with a covering portion 37a that is bent outward and then bent inward. The two oppositely disposed coatings 37a preferably form a () shape or a < > shape to retain the locking post 39. Further, each elastic claw 37 may further include a guide portion 37b bent outward again from the covering portion 37a. The two oppositely disposed guides 37b are preferably splayed to guide the locking post 39 into the space between the two cladding portions 37a. Although the locking post 39 may be cylindrical, it is preferred that both sides of the locking post 39 are chamfered, and the two flat surfaces 39a formed by the chamfering converge toward the direction of the printing paper deck 16, which further helps to guide the locking post 39 into engagement with the pair of resilient jaws 37.

When the printing paper bin 16 is to be completely closed, the inner wall of the covering part 37a of the elastic clamping jaw 37 exerts a pushing force on the locking column 39, which is helpful for pushing the printing paper bin 16. After the printing paper compartment 16 is completely closed, the resilient jaw 37 may be reset to make a "click" sound to provide feedback to the user that the printing paper compartment 16 is completely closed.

In the preferred embodiment shown in fig. 3 and 4, two pairs of resilient jaws 37 and corresponding two locking posts 39 are provided, but it will be appreciated that only one or more pairs of resilient jaws 37 and corresponding locking posts 39 are possible. It is also possible to arrange pairs of resilient jaws on the support plate 3 and locking columns 39 on the frame 11.

In a normal state, the movable frame assembly 9 is inserted 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 21 is in pressure contact with the print head on the print head mount 7. The printing paper 16 passes between the rubber platen roller 21 and the print head. When the printing mechanism operates, the motor 25 drives the rubber pressing roller 21 to rotate through the second belt wheel, the motor 25 and the first belt wheel 23, so that the thermal printing paper is dragged to pass through the printing head, and the vital characteristic curve of a fetus is recorded on the printing paper.

When the movable frame assembly 9 is pulled out to take and place the printing paper, the elastic clamping jaw 37 is separated from the locking column 39 under the action of external pulling force, so that the printing paper bin is moved to the outer side of the shell of the medical monitoring device, and the printing paper can be taken and placed conveniently. After the printer paper is loaded, the resilient jaws 37 are opened under external pushing force to receive the locking posts 39 and then tightly grip the locking posts 39, thereby locking the printer paper cartridge 16 in place in the housing of the medical monitoring device.

According to the utility model discloses a printing mechanism, its locking mechanism not only spare part is less, the design is simple with the assembly, and the user need not to do extra pressing operation or with very big strength when using moreover, only relies on the one hand and just can print the operation that opens and shuts in paper storehouse, and the push-and-pull is stable not have and rocks, realizes reliable and stable locking.

Fig. 7 shows schematically in a perspective view a support plate of a printing mechanism of a medical monitoring device according to the invention. As shown in fig. 7, the support plate 3 includes a substantially flat plate-like body 3a made of metal or plastic, and at least one set of spaced bushings 3b is provided on a top surface of the body 3a (i.e., a surface for supporting the movable housing assembly 9) in the moving direction of the movable housing assembly 9, the holes defined by the bushings 3b in each set being substantially aligned and adapted to receive the guide rods 41 (shown in fig. 8 and 9). The bore defined by the boss 3b may be open toward the bottom surface of the body 3 a. In the preferred embodiment, two sets of spaced apart bushings are shown, but it is understood that only one or more sets of spaced apart bushings may be provided. Two elongated openings 3c are formed in each set of sleeves at positions between the adjacent sleeves 3b so that one elastic beam 3d is defined between the two elongated openings 3c, that is, a portion between the two elongated openings 3c is made elastic by forming the two elongated openings 3c so as to be elastically deformable in a direction perpendicular to the body 3a as needed. A V-shaped, U-shaped or semi-circular damping bracket 3e is arranged on each elastic beam 3 d. The damping bracket 3e is typically made of a glass fibre reinforced nylon material or other plastic material. Although in the preferred embodiment the resilient beam 3d is formed in each set of bushings at a location between adjacent bushings 3b and the damping brackets 3e are provided on the resilient beam 3d, it will be appreciated that it is also possible to not form the resilient beam 3 d.

As shown in fig. 8 and 9, the guide rod 41 passes through the holes of each set of spaced-apart bosses 3b and the guide rod 41 is supported on the damping bracket 3e on each elastic beam 3d, and then the guide rod 41 is fixed to the bottom of the frame 11 of the movable frame assembly 9 by screws passing through the holes 41a, 41b at both ends of the guide rod 41 so that the guide rod 41 can be guided and moved together with the movable frame assembly 9. As shown in fig. 2, the guide bar 41 is preferably fixed to the first and second connection plates 17 and 19. Thus, the guide rod 41 can guide the movement of the frame 11 or the movable frame assembly 9 through the boss 3b of the support plate 3. When the guide rod 41 contacts the damping bracket 3e on each elastic beam 3d, the damping bracket 3e is pressed to elastically deform the elastic beam 3d vertically downward to the moving direction of the guide rod 41, and the damping bracket 3e applies a reaction force to the guide rod 41 vertically upward to the moving direction of the guide rod, which not only generates a beneficial friction force between the damping bracket 3e and the guide rod 41, but also causes the guide rod 41 to closely contact the bushing 3b to generate another beneficial friction force. This beneficial friction provides a beneficial damping force for the movement of the movable frame assembly 9 (i.e., the printing paper compartment), not only provides a good hand feeling when the user pushes and pulls the printing paper compartment, but also prevents the printing paper compartment from shaking, thereby ensuring that the printing mechanism can be positioned with high precision and the opening and closing actions are smooth in both horizontal and hanging operations.

In order to enable the printing paper bin to be pulled out easily, the number of the shaft sleeves in each group of shaft sleeves is not easy to be set too much. In order to further guide and limit the guide rod 41, a guide groove 3f is provided on the body 3a of the support plate 3 at a position where the guide rod 41 passes through but no boss is provided, so that the guide rod 41 can be partially received in the guide groove 3f when passing through the guide groove 3 f.

The guide grooves 3f may also be provided with through holes 3g spaced apart in the support plate 3, in the preferred embodiment four through holes 3g are shown in the guide grooves 3f, it being understood that the number of through holes in the guide grooves 3f may be more or less than four. As mentioned above, the hole defined by the sleeve 3b may also be open towards the bottom surface of the body 3a, which in this case means that in the preferred embodiment a corresponding seven through holes are provided in the body 3a through which each guide rod 41 passes.

Fig. 10 schematically shows in a perspective view a rub strip of a printing mechanism of a medical monitoring device according to the present invention. As shown in fig. 10, each of the friction strips 43 includes a planar carrier 43a and pads 43b formed to project at the center of the carrier 43a, the number of the pads 43b corresponding to the number of the through holes on the body 3a through which each of the guide bars 41 passes. The cross-sectional shape and size of the pad 43b are substantially the same as those of the through-hole 3g so that the pad 43b passes through the through-hole 3g from the bottom of the body 3a and slightly protrudes from the through-hole 3g toward the top of the body 3 a. The rubbing strip 43 may be made of an elastic material such as rubber or the like. The guide rod 41 presses the pad 43b of the friction strip 43 when it contacts the pad 43b, thereby generating another advantageous friction force, further ensuring high precision positioning of the printing cartridge in both horizontal and suspended operation of the printing mechanism. In order to facilitate elastic deformation of the pad block 43b and ensure a proper frictional force, a hollowed portion 43c may be formed below the top surface of the pad block 43 b. In the preferred embodiment, the carrier 43a of the rubbing strip 43 is formed with a groove 43d connecting the respective cutouts 43c.

According to the utility model discloses, through setting up the friction strip of direction recess and/or area cushion, can further improve the printing mechanism and print the positioning accuracy in paper storehouse and the smooth and easy degree of opening and shutting action at the horizontal work with hang the during operation.

While the invention has been described in detail in connection with the preferred embodiments thereof, it is to be understood that such detail is solely for that purpose and that no limitation of the invention is thereby intended. For example, the first locking member may be provided as a shaft and the second locking member may be provided as a sleeve for receiving the shaft, the shaft and sleeve being releasably engaged by friction. 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 movable frame assembly (9) movably arranged on the support plate (3), the movable frame assembly (9) comprising a frame (11); and

a printing paper magazine (16) for containing printing paper, the printing paper magazine (16) being mounted on the frame (11) so as to move with the movable frame assembly;

the printing mechanism further includes:

at least one set of spaced bushings (3 b) provided on the top surface of the body (3 a) of the support plate (3) along the direction of movement of the movable frame assembly (9); and

a guide rod (41) passing through a hole defined by each set of spaced bushings (3 b) and fixed at both ends to the bottom of the frame (11), the guide rod (41) guiding and moving together with the movable frame assembly (9);

wherein a damping bracket (3 e) is arranged between adjacent bushings (3 b) in each set of said bushings, said damping bracket (3 e) being in contact with said guide rod (41) and exerting an upward force on said guide rod (41) perpendicular to its direction of movement.

2. Printing mechanism for medical monitoring devices according to claim 1, wherein two elongated openings (3 c) are formed between adjacent sleeves (3 b) in each set of sleeves, thereby defining a resilient beam (3 d) between the two elongated openings (3 c), the damping receptacle (3 e) being arranged on the resilient beam (3 d).

3. Printing mechanism for medical monitoring devices according to claim 1, wherein the damping receptacle (3 e) is V-shaped, U-shaped or semi-circular.

4. Printing mechanism for medical monitoring devices according to claim 1, characterized in that a guiding recess (3 f) is provided on the body (3 a) where the guiding rod (41) passes but the bushing is not provided, the guiding rod (41) being partly received in the guiding recess (3 f) when passing the guiding recess (3 f).

5. The printing mechanism of medical monitoring equipment as set forth in claim 4, characterized in that a through hole (3 g) is further provided at a position on the body (3 a) where the guide groove (3 f) is located at a distance, the printing mechanism further comprises a rubbing strip (43), the rubbing strip (43) comprises a planar carrier (43 a) and a pad (43 b) convexly formed on the carrier (43 a), the pad (43 b) protrudes from the bottom of the body (3 a) through the through hole (3 g) toward the top of the body (3 a) so that the guide bar (41) presses the pad (43 b) when contacting the pad (43 b).

6. Printing mechanism for medical monitoring devices according to claim 5, characterized in that the hole defined by the sleeve (3 b) is open towards the bottom surface of the body (3 a), the pad (43 b) also passing through a through hole underneath the sleeve (3 b).

7. The printing mechanism of a medical monitoring device according to claim 5, wherein a hollowed-out portion (43 c) is formed below the top surface of the pad (43 b).

8. The printing mechanism of a medical monitoring device of claim 1, further comprising:

a support arm (5) arranged on the support plate (3), the support arm (5) being provided with a print head; and

the driving mechanism is used for driving the rubber press roller (21) to rotate;

wherein the movable frame assembly (9) further comprises a rubber compression roller (21) which is arranged at the front end of the frame (11) close to the outer side of the medical monitoring equipment and is used for being in pressure contact with the printing head, and the movable frame assembly (9) is positioned between the supporting plate (3) and the supporting arm (5).

9. Printing mechanism for medical monitoring devices according to claim 8, further comprising a locking mechanism, wherein the locking mechanism comprises elastic jaws (37) arranged in pairs and opposite at the rear end of the frame (11), and locking posts (39) arranged on the support plate (3) in correspondence of the elastic jaws (37), the elastic jaws (37) being intended to be clamped together with each other, the elastic jaws (37) being opened under an external pushing force to receive the locking posts (39) and tightly clamp the locking posts (39), the elastic jaws (37) being disengaged from the locking posts (39) under an external pulling force.

10. The printing mechanism of the medical monitoring device as claimed in claim 8, wherein the driving mechanism comprises a first pulley (23) fixedly mounted at one end of the rubber pressure roller (21), a motor (25) mounted on the frame (11), a second pulley mounted on a rotating shaft of the motor (25), and a timing belt (27) mounted on the first pulley (23) and the second pulley for rotating the rubber pressure roller (21) when the motor (25) is operated, wherein the motor (25) is disposed at a rear end of the frame (11) near an inner side of the medical monitoring device.

11. A printing mechanism for a medical monitoring apparatus according to claim 8, wherein the support arm (5) is L-shaped, the support arm (5) being rotatably mounted at one end (5 a) to the support plate (3), the support arm (5) being mounted at its other end (5 b) with a print head mount (7), the print head being mounted on the print head mount (7).

12. The printing mechanism of medical monitoring equipment as claimed in claim 11, wherein the frame (11) comprises a first mounting plate (13) and a second mounting plate (15) which are oppositely arranged, and a first connecting plate (17) and a second connecting plate (19) which fixedly connect the first mounting plate (13) and the second mounting plate (15) together, the first mounting plate (13) and the second mounting plate (15) are respectively formed with a first guiding groove (29) and a second guiding groove (31) which extend along the longitudinal direction, and the two end portions (7 a, 7 b) of the print head mounting portion (7) are movably supported in the first guiding groove (29) and the second guiding groove (31).

13. The printing mechanism of a 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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