JP2013070879A - Sealing member, and electronic instrument provided with sealing member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing member improved in external appearance, and preventing the intrusion of liquid such as drug or water into a body case from the joint section of the body case; and to provide an electronic instrument provided with the sealing member.SOLUTION: The sealing member 500 is disposed to secure the liquid-tightness of the joint section of the body case 2 of an electronic instrument, has a u-shaped cross-section and includes: a first portion 501 that is disposed inside the joint section of the body case 2; a second portion 502 that is disposed to the inside of the joint section at a distance from the first portion 501; and a connecting portion 503 that connects the first portion 501 to the second portion 502.

Description

  The present invention relates to a seal member mounted on an electronic device such as a syringe pump or an infusion pump for delivering a drug or the like to a patient, for example, and an electronic device including the seal member.

A syringe pump, which is an example of an electronic device, is used in, for example, an intensive care unit (ICU) and the like, and supplies a patient with drugs such as anticancer agents, anesthetic agents, chemotherapeutic agents, blood transfusions, and nutritional agents. It is used to perform treatment for a relatively long time with high accuracy. The flow rate control of the drug in the syringe pump is precise and superior compared to other infusion pumps.
That is, the syringe main body filled with the medicine is set so as not to move with respect to the main body case of the syringe pump using a clamp with respect to the syringe pump, and the syringe pump presses the syringe pusher and the medicine in the syringe main body. Is accurately delivered to the patient (see Patent Document 1).

JP 2010-88564 A

By the way, a medical pump such as a syringe pump is used in, for example, a treatment room, an operating room, or the like under a use environment where the medical pump is exposed to the medicine or moisture when the medicine is fed. A display unit such as a circuit board or a liquid crystal display device is accommodated in the main body case of the syringe pump. If the medicine or moisture enters the main body case through the gap between the joints of the main body case, these circuit boards and display parts are affected by the medicine and moisture, and the syringe pump functions. It becomes impossible to do. For this reason, it is necessary to prevent this medicine and moisture from entering the main body case of the syringe pump described above.
Thus, in order to prevent the medicine and moisture from entering the main body case, a seal member is disposed at the connection portion of the main body case of the syringe pump. However, the conventionally used sealing member has a large thickness, and since this sealing member is exposed to the outside of the main body case, the sealing member can be seen and the appearance is poor.
Therefore, the present invention provides an electronic device including a sealing member and a sealing member that can improve appearance and prevent a liquid such as a medicine or moisture from entering a main body case from a joint portion of the main body case. The purpose is to provide.

The seal member of the present invention is a seal member arranged to ensure the liquid-tight performance of the joint portion of the main body case of the electronic device, and has a U-shaped cross section, and the inside of the joint portion of the main body case. A first portion disposed on the second portion, a second portion disposed on the inner side of the joint portion at an interval from the first portion, and a connection portion connecting the first portion and the second portion. It is characterized by providing.
According to the above configuration, since the first portion of the seal member is arranged inside the joint portion of the main body case, the seal member is not visible at all from the outside of the main body case, and the appearance can be improved. In addition, the seal member can prevent liquid such as medicine and moisture from entering the main body case from the joint portion of the main body case.

Preferably, the connecting portion of the seal member is formed with a protruding portion that is fitted into a fitting hole portion formed in the joint portion of the main body case.
According to the above configuration, the protruding portion of the connecting portion of the seal member is fitted into the fitting hole portion of the joint portion of the main body case, so that the liquid tight performance can be ensured by mechanically crushing at the protruding portion and the fitting hole portion. Therefore, even if the thickness of the joint portion of the main body case is thin, the joint portion can be prevented from being cracked or a gap is formed, and the liquid-tight performance of liquids such as drugs and moisture can be ensured.

Preferably, the main body case includes a front cover and a rear cover joined to the front cover at the joining portion, and the seal member is disposed along the joining portion of the front cover and the rear cover. It is a shaped member.
According to the said structure, it can prevent that liquids, such as a chemical | medical agent and a water | moisture content, penetrate | invade in a main body case with a sealing member over the perimeter of the junction part of a front cover and a rear cover.

Preferably, the electronic device is a medical pump, and the medical pump is provided in the main body case, and a tube mounting portion for horizontally mounting an infusion tube for transfusing a drug in a drug bag to a patient side; and the main body In a state where the infusion tube is mounted in the lateral direction provided in the case, a liquid feeding drive unit for feeding the medicine by peristating the infusion tube by peristalsis and mounting the tube by closing And an opening / closing cover that covers the liquid feeding drive unit,
It is characterized by being an infusion pump having.
According to the above configuration, since the first part of the seal member is disposed inside the joint part of the main body case even in an infusion pump used in an environment where chemicals or moisture is used, the seal member is provided in the main body case. It can be seen from the outside, and the appearance can be improved, and the seal member can prevent liquid such as medicine and moisture from entering the main body case from the joint portion of the main body case.

Preferably, the electronic device is a medical pump, and the medical pump is provided in the main body case, and the main body case is provided with a syringe housing portion in which a transfusion tube for transfusing a medicine in the syringe to the patient side is mounted in the lateral direction; A syringe pump having a syringe pusher drive unit that is provided in a case and pushes the pusher of the syringe to feed the medicine in the syringe while the infusion tube is mounted in the lateral direction. Features.
According to the above configuration, since the first portion of the seal member is disposed inside the joint portion of the main body case even in a syringe pump used in an environment where chemicals or moisture is used, the seal member is the main body case. It can be seen from the outside, and the appearance can be improved, and the seal member can prevent liquid such as medicine and moisture from entering the main body case from the joint portion of the main body case.

The electronic device of the present invention is an electronic device including a seal member that is arranged to ensure the liquid-tight performance of the joint portion of the main body case, the seal member having a U-shaped cross section, and the main body case A first portion disposed inside the joint portion, a second portion disposed inside the joint portion with a distance from the first portion, and connecting the first portion and the second portion. And a connecting portion.
According to the above configuration, since the first portion of the seal member is arranged inside the joint portion of the main body case, the seal member is not visible at all from the outside of the main body case, and the appearance can be improved. In addition, the seal member can prevent liquid such as liquid such as medicine and water from entering the main body case from the joint portion of the main body case.

  In the present invention, since the first portion of the seal member is disposed inside the joint portion of the main body case, the seal member is not visible at all from the outside of the main body case, and the appearance can be improved. The seal member can provide a seal member that can prevent a liquid such as a medicine or moisture from entering the main body case from the joint portion of the main body case, and an electronic device including the seal member.

The perspective view which shows the syringe pump which is one Embodiment of the electronic device of this invention. The perspective view which looked at the syringe pump shown in FIG. 1 from the W direction. The figure which shows the electrical structural example in a syringe pump. The disassembled perspective view which shows the structural example of the sealing member as a front cover and rear cover of a syringe pump, and a splash-proof and drip-proof (waterproof) process structure. Sectional drawing which shows the example of the state which has joined the sealing object part which is a junction part of a front cover, and the sealing object part which is a junction part of a rear cover to a liquid-tight state by the sealing member. The perspective view which shows the infusion pump which is another embodiment of the electronic device of this invention. The front view which looked at the infusion pump shown in FIG. 6 from the W direction. The disassembled perspective view which shows the structural example of the seal member as a front cover and rear cover of an infusion pump, and a splash-proof and drip-proof (waterproof) process structure. Sectional drawing which shows the example of the state which has joined the sealing object part which is a junction part of a front cover, and the sealing object part which is a junction part of a rear cover to a liquid-tight state by the sealing member.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.
FIG. 1 is a perspective view showing a syringe pump as an example of an electronic apparatus provided with a preferred embodiment of a seal member of the present invention. FIG. 2 is a perspective view of the syringe pump shown in FIG. 1 as viewed from the W direction.
A syringe pump 1 shown in FIGS. 1 and 2 is an example of a medical device, and is used in, for example, an intensive care unit or the like. For a patient, an anticancer agent, an anesthetic agent, a chemotherapeutic agent, a blood transfusion, etc. This is an infusion pump that is used to perform an infusion treatment of a drug such as with high accuracy for a relatively long time.

As shown in FIGS. 1 and 2, the syringe pump 1 can be set so that the syringe body 201 of the syringe 200 filled with, for example, a medicine does not move using the clamp 5. When the motor 133 shown in FIG. 2 rotates the drive shaft of the syringe pusher drive unit 7, the slider 10 of the syringe pusher drive unit 7 pushes the syringe pusher 202 of the syringe 200 in the T direction. As shown in FIG. 2, the medicine in the main body 201 is accurately fed to the patient P via the tube 203 and the indwelling needle 204.
The syringe pump 1 has a main body case 2 which is also referred to as a main body or a housing. The main body case 2 is integrally formed of a molded resin material having chemical resistance, and includes a front cover 2F which is a first case portion, By assembling the rear cover 2R, which is a two-case part, it is configured as a box having liquid tightness. The front cover 2F is also referred to as a front casing, and the rear cover 2R is also referred to as a rear casing. Thereby, as will be described later, it has a splash-proof and drip-proof (waterproof) treatment structure that can prevent the medicine pump 1 from entering the syringe pump 1 even if it is exposed to chemicals or moisture.

First, each element arrange | positioned at the main body case 2 of the syringe pump 1 is demonstrated.
As shown in FIG. 2, the syringe pump 1 has a main body case 2 and a handle 2T. A display unit 3 and an operation panel unit 4 are arranged on the upper portion 2A of the main body case 2. A syringe setting unit 6, a motor 133, and a syringe pusher drive unit 7 are arranged in the lower part 2 </ b> B of the main body case 2. Thereby, the medical worker can perform the liquid feeding operation of the medicine from the syringe 200 while visually confirming the information content displayed in color on the display unit 3 of the upper portion 2A of the main body case 2. Then, the medical staff can operate the operation buttons on the operation panel unit 4 while confirming the information content displayed in color on the display unit 3 of the main body case 2.

  The display unit 3 shown in FIGS. 1 and 2 is configured by a color liquid crystal display or an organic EL that can perform color graphic display. The display unit 3 is located at the upper left position of the upper portion 2 </ b> A of the main body case 2 and above the syringe setting unit 6 and the syringe pusher driving unit 7. The operation panel unit 4 is arranged on the right side of the display unit 3 in the upper part 2A of the main body case 2. The operation panel unit 4 includes, as illustrated in the example, pilot lamps 4A, fast-forward switch buttons 4B, and start switches. A button 4C, a stop switch button 4D, a menu selection button 4E, and the like are arranged.

An upper portion 2A of the main body case 2 shown in FIG. The lower part 2 </ b> B of the main body case 2 is a lower half part of the main body case 2.
As shown in FIGS. 1 and 2, the syringe setting unit 6 and the syringe pusher drive unit 7 are arranged side by side along the X direction. The syringe setting unit 6 can select and mount a necessary amount of syringe 200 from among a plurality of types of syringes having different amounts of accommodation.

  The syringe setting unit 6 shown in FIGS. 1 and 2 includes a housing unit 8 that houses the syringe body 201, a clamp 5, and a body flange gripping part 496 for fitting and gripping the body flange 209 of the syringe 200. Yes. The accommodating part 8 has a concave syringe body holding part 8D. A tube fixing portion 9 for detachably sandwiching the tube 203 is formed in the wall portion at the left end of the housing portion 8. The tube fixing portion 9 is a groove portion that sandwiches and fixes a portion of the tube 203 as shown in FIG.

1 and 2, when a medical worker operates the clamp 5 and removes the syringe 200 from the syringe setting unit 6, for example, the clamp 5 is resisted against the force of a spring (not shown) in the Y1 direction (frontward direction). And the clamp 5 is separated from the outer peripheral surface of the syringe body 201 by turning 90 degrees in the R1 direction. As a result, the syringe body 201 can be released from the syringe body holding portion 8D of the housing portion 8 and the tube 203 can be removed from the tube fixing portion 9 by releasing the fixation by the clamp 5.
Further, when the clamp 5 is operated and the syringe 200 is accommodated and attached in the accommodating portion 8 of the syringe setting portion 6, the clamp 5 is pulled in the Y1 direction against the force of a spring (not shown) to be 90 in the R2 direction. The syringe body 201 is housed in the syringe body holding part 8D of the housing part 8 and the tube 203 is fitted in the tube fixing part 9 by rotating it and returning to the Y2 direction by the force of the spring. 5 can be fixed.

  As shown in FIGS. 1 and 2, when the syringe main body 201 is accommodated and mounted in the syringe main body holding portion 8 </ b> D of the accommodating portion 8, the syringe pusher 202 is disposed in the syringe pusher driving portion 7. The syringe pusher drive unit 7 has a slider 10. When the motor 133 is driven by a command from the control unit, the slider 10 pushes the pusher flange 205 of the syringe pusher 202 little by little along the T direction relative to the syringe body 201. Thereby, the medicine in the syringe body 201 can be delivered to the patient P with high accuracy over a relatively long time through the tube 203 and the indwelling needle 204. Note that the X direction, the Y direction, and the Z direction in FIGS. 1 and 2 are orthogonal to each other, and the Z direction is the vertical direction.

Next, with reference to FIG. 3, the electrical structural example in the syringe pump 1 shown in FIG. 1 and FIG. 2 is demonstrated.
In FIG. 3, the syringe pump 1 has a control unit (computer) 100 that controls the overall operation. The control unit 100 is a one-chip microcomputer, for example, and includes a ROM (read only memory) 101, a RAM (random access memory) 102, a nonvolatile memory 103, and a clock 104. The clock 104 can correct the current time by a predetermined operation, and can acquire the current time, measure the elapsed time of a predetermined liquid feeding operation, measure the reference time of liquid feeding speed control, and the like.

  The control unit 100 shown in FIG. 3 is connected to a power switch button 4S and a switch 111. The switch 111 supplies power to the control unit 100 from either the power converter unit 112 or the battery 113 by switching between the power converter unit 112 and a battery 113 such as a lithium ion battery. The power converter unit 112 is connected to a commercial AC power source 115 via an outlet 114. In FIG. 3, a pair of detection switches 120 and 121 are arranged in the accommodating portion 8. The detection switches 120 and 121 detect whether or not the syringe body 201 of the syringe 200 is correctly arranged in the storage unit 8 and notify the control unit 100 of it.

A potentiometer 122 as a clamp sensor shown in FIG. 3 is connected to the clamp 5. The potentiometer 122 detects the amount of movement of the clamp 5 when the clamp 5 moves in the Y2 direction in FIG. Is sent to the control unit 100 to notify whether it is clamped by the clamp 5. The control unit 100 obtains the amount of movement of the clamp 5 in the Y direction based on the detection signal from the potentiometer 122, and for example, which size of the multiple types of syringe main bodies 201 shown in FIG. Can be determined.
When the motor 133 of the syringe pusher drive unit 7 shown in FIG. 3 is driven by the motor driver 134 in response to a command from the control unit 100, the feed screw 135 is rotated to move the slider 10 in the T direction. Thereby, the slider 10 presses the syringe pusher 202 in the T direction, and accurately delivers the medicine in the syringe main body 201 shown in FIG. 2 to the patient P through the tube 203 via the indwelling needle 204. .

In FIG. 3, the display unit driver 130 drives the display unit 3 according to a command from the control unit 100 to display various information, notification contents, and the like. The speaker 131 can notify various notification contents by voice according to a command from the control unit 100.
The control unit 100 can communicate bidirectionally with a computer 141 such as a desktop computer through the communication port 140. The computer 141 is connected to a drug database (DB) 150, and drug information MF stored in the drug database 150 is acquired by the control unit 100 via the computer 141, and the control unit 100 is non-volatile. It can be stored in the memory 103. The control unit 100 can display the drug information MF and the like on the display unit 3 based on the stored drug information MF.
In FIG. 3, a fast forward switch button 4B, a start switch button 4C, a stop switch button 4D, and a menu selection button 4E are electrically connected to the control unit 100.
In addition, a photocoupler sensor 250 as a detector for detecting that the main body flange 209 shown in FIG. 2 has been inserted is electrically connected to the control unit 100. The photocoupler sensor 250 includes a light emitting element 251 and a light receiving element 252 that receives light from the light emitting element 251.

Next, with reference to FIG. 4, the structure of the front cover 2F of the main body case 2 and the rear cover 2R and the structure of splash-proof and drip-proof (waterproof) treatment will be described.
FIG. 4 is an exploded perspective view showing a structural example of the front cover 2F, the rear cover 2R, and a seal member 500 as a splash-proof and drip-proof (waterproof) treatment structure.
The main body case 2 shown in FIG. 4 is configured by joining and assembling a front cover 2F and a rear cover 2R, and the depth dimension G1 of the front cover 2F is larger than the depth dimension G2 of the rear cover 2R. The front cover 2 </ b> F shown in FIG. 4 has a circuit element, a storage space 450 for the display unit, and a storage space 451 for the syringe pusher driving unit 7. The capacity of the accommodation space 450 is larger than the capacity of the accommodation space 451.

As shown in FIG. 3, the accommodation space 450 of the front cover 2F shown in FIG. 4 includes a display unit 3, a control unit 100, a motor 133, a power switch button 4S, a switch 111, a power converter unit 112, a battery 113, and a pair. Detection switches 120 and 121, display driver 130, speaker 131, communication port 140, fast-forward switch button 4B, start switch button 4C, stop switch button 4D, menu selection button 4E, and the like.
On the other hand, the accommodation space 451 of the front cover 2F shown in FIG. 4 accommodates the slider 10, the drive shaft 135, and the bellows-like cover 136 of the syringe pusher drive unit 7.

On the other hand, the rear cover 2 </ b> R shown in FIG. 4 has a battery housing part 119 that detachably houses the battery 113 shown in FIG. 3, and this battery housing part 119 can be opened and closed by a cover 118. In addition, the rear cover 2R has a fixing portion (not shown) for fixing an attachment (not shown) for detachably fixing the syringe pump 1 to, for example, a mounting pole (not shown). doing.
The rear cover 2R shown in FIG. 4 has a size that can cover the entire accommodation space 450 of the front cover 2F and a part 452 of the accommodation space 451. Therefore, the remaining portion 453 of the accommodation space 451 is not covered with the rear cover 2R.

The seal member 500 shown in FIG. 4 is an endless packing, and is made by molding a material that can be elastically deformed by being crushed, such as silicone rubber or synthetic rubber. The seal member 500 is sandwiched between overlapping edge portions when the front cover 2F and the rear cover 2R are joined together, so that the entire accommodation space 450 of the front cover 2F, a part 452 of the accommodation space 451, and the accommodation of the rear cover 2R. The space 454 has a function of sealing in a liquid-tight state.
The seal member 500 has portions 501, 502, 503, 504, 505 and 506. The parts 501, 503 and 505 are parallel, and the parts 504 and 506 are parallel. The part 502 is inclined with respect to the part 501. The portions 501, 502, 503, 504, 505, and 506 are attached to the sealing target portions 551, 552, 553, 554, 555, and 556 of the front cover 2F, respectively. The parts 501, 502, 503, 504, 505, and 506 are attached to the sealing target parts 571, 572, 573, 574, 575, and 576 of the rear cover 2R, respectively.

FIG. 5 shows sealing target portions 551, 552, 553, 554, 555 556, which are joint portions of the front cover 2 F, and sealing target portions 571, 572, 573, 574, 575, 576, which are joint portions of the rear cover 2 R, It is sectional drawing which shows the example joined to the liquid-tight state by the sealing member 500. FIG. In FIG. 5, the right side shows the accommodation spaces 450 and 451 of the main body case 2, and the left side shows the outside of the main body case 2.
The sealing target portions 551, 552, 553, 554, 555, and 556 of the front cover 2 </ b> F have a convex portion 580 and a concave accommodating portion 581 that is formed continuously with the convex portion 580. The concave accommodating portion 581 has an L-shaped cross section. On the other hand, the sealing target portions 571, 572, 573, 574, 575, and 576 of the rear cover 2R have a concave portion 590 and a convex portion 591. A fitting hole 592 is formed in the convex portion 591.
As shown in FIG. 5, the seal member 500 preferably has a U-shaped or U-shaped cross-sectional shape of Japanese katakana characters. The seal member 500 includes a first portion 501, a second portion 502, and a connection portion 503. One projection portion 504 is formed on the outer surface portion 505 of the connection portion 503.

  When the front cover 2F and the rear cover 2R are joined in a liquid-tight state via the seal member 500, the convex portion 580 of the front cover 2F and the concave portion 590 of the rear cover 2R are brought into close contact and joined. Between the accommodating part 581 of the front cover 2F and the convex part 591 of the rear cover 2R, the area | region corresponding to the 1st part 501 of the sealing member 500 and most parts of the connection part 503 is accommodated. The second portion 502 is accommodated in the inner cover rib 2N. The cover rib 2N is formed, for example, inside the front cover 2R. The protruding portion 504 is continuously formed over the entire circumference along the longitudinal direction 500L of the seal member 500 (the direction perpendicular to the paper surface of FIG. 5). The protruding portion 504 is a portion that is fitted into the fitting hole 592 of the rear cover 2R. The fitting hole 592 of the rear cover 2R is also formed along the longitudinal direction 500L (the direction perpendicular to the paper surface of FIG. 5).

In this way, since the convex portion 580 of the front cover 2F and the concave portion 590 of the rear cover 2R are in close contact with each other, the seal member 500 is completely invisible from the direction of the arrow RN. . That is, the sealing material 2 is considered not to be seen at all from the outside of the front cover 2F and the rear cover 2R, and the appearance of the joint portion between the front cover 2F and the rear cover 2R is improved. Thus, since the 1st part 501 of the seal member 500 is arrange | positioned inside the junction part of the main body case 2, the seal member 500 cannot be seen from the outer side of the main body case 2 at all, and the external appearance is improved. Can do. Moreover, the seal member 500 can prevent the medicine and moisture from entering the main body case 2 from the joint portion of the main body case 2 with certainty.
Note that the ratio of the height 504H to the width 504W of the protruding portion 504 shown in FIG. 5 is preferably 1: 1. By setting the ratio of the height 504H and the width 504W of the protruding portion 504 to 1: 1, even if the protruding portion 504 is pressed in the fitting hole portion 592 of the rear cover 2R, the protruding portion 504 is difficult to fall. Yes.

The protrusions 504 are formed along the longitudinal direction 500L of the seal member 500, and the recessed holes 592 are formed along the longitudinal direction 500L in the rear cover 2R, as shown in FIG. This is because the total width MW of the rear cover 2R is about 3 mm, for example, and the width SW that contributes to mechanically crushing the seal member 500 by the front cover 2F and the rear cover 2R is as thin as about 2 mm, for example. The reason why the full width MW of the front cover 2F and the rear cover 2R is set to be relatively thin is to reduce the weight of the syringe pump 1.
For this reason, if the protruding portion 504 is not formed, the entire outer surface (bottom surface) of the connecting portion 503 of the seal member 500 is pressed against the convex portion 591 of the rear cover 2R to obtain liquid-tight performance. Then, the following problem occurs. That is, the repulsive force from the entire outer surface (bottom surface) of the connection portion 503 of the seal member 500 gives a mechanical load to the thin front cover 2F and the rear cover 2R, and the front cover 2F and the rear cover 2R are joined. May cause mechanical deformation of the part. In addition, there is a concern that cracks may occur in the joint portion between the front cover 2F and the rear cover 2R, and a gap may occur in the joint portion between the front cover 2F and the rear cover 2R that is not screwed. In these cases, it becomes impossible to ensure liquid-tight performance against chemicals and moisture at the joint between the front cover 2F and the rear cover 2R.

  For this reason, in the embodiment of the present invention, the protruding portion 504 is formed along the longitudinal direction 500L of the seal member 500 and is fitted into the fitting hole portion 592 on the rear cover 2R side, whereby the protruding portion 504 and the fitting hole portion 592 are formed. By the way, it can be crushed mechanically to ensure the liquid-tight performance, and the sealing portion, that is, the liquid-tight performance can be reliably ensured by preventing the protruding portion 504 from falling down. Accordingly, a mechanical load is not applied to the thin front cover 2F and the rear cover 2R from the entire outer surface (bottom surface) of the connection portion 503 of the seal member 500, and the joint portion between the front cover 2F and the rear cover 2R. Does not cause mechanical deformation. In addition, there is no fear of cracks at the joint between the front cover 2F and the rear cover 2R, and there is no risk of a gap being created at the joint between the front cover 2F and the rear cover 2R that are not screwed.

If the height 504H of the protruding portion 504 is too large, the protruding portion 504 may fall when the protruding portion 504 is fitted in the fitting hole portion 592, and the sealing performance may not be exhibited. In addition, if the height 504H of the protruding portion 504 is too small, the amount of crushing of the sealing material 500 increases due to variations in tolerances at the time of manufacturing the sealing material 500, and the surface pressure of the connecting portion 503 with respect to the convex portion 591 is excessive. The part which becomes becomes. Accordingly, the height 504H of the protruding portion 504 is preferably 0.6 mm, for example.
Since the seal member 500 is interposed at the joint between the front cover 2F and the rear cover 2R shown in FIG. 5, even if a liquid such as a medicine or moisture enters the RN direction, the convex portion 590 of the front cover 2F and the rear cover 2R recesses 580 are brought into contact with each other, and the protruding portions 504 are formed along the longitudinal direction 500L of the seal member 500 and are fitted into the fitting holes 592 on the rear cover 2R side. Such a liquid can be reliably prevented from entering the front cover 2F and the rear cover 2R. This ensures that the above-described elements arranged inside the front cover 2F and the rear cover 2R, that is, the display unit 3, the control unit 100, the motor 133, etc. illustrated in FIG. Can be prevented. For this reason, it is possible to eliminate the phenomenon that the operation of the syringe pump 1 stops or malfunctions, so that the inconvenience that the liquid feeding operation of the medicine stops can be eliminated.

Next, another embodiment of the present invention will be described with reference to FIGS.
FIG. 6 is a perspective view showing a preferred embodiment of an infusion pump as an example of the electronic apparatus of the present invention. FIG. 7 is a perspective view of the infusion pump shown in FIG. 6 as viewed from the W direction.
The infusion pump 1 shown in FIG. 6 and FIG. 7 is used in, for example, an intensive care unit (ICU, CCU, NICU) and the like. This is an infusion pump that is used to perform infusion treatment of a medicine such as a medicine with a high accuracy for a relatively long time.

  As shown in FIG. 7, the infusion pump 1001 can accurately deliver liquid to the patient P from the medicine bag 1170 filled with the medicine 1171 via the clamp 1179, the infusion tube 1200, and the indwelling needle 1172. The infusion pump 1001 shown in FIGS. 1 and 2 has a main body case 1002 and a handle 1002T, and the handle 1002T can be extended in the N direction or stored in the T direction. The main body case 1002 is also referred to as a main body, and is integrally formed of a molded resin material having chemical resistance, and can prevent entry into the infusion pump 1001 even if a drug or the like is applied. As described above, the main body case 1002 has a splash-proof and drip-proof structure because the medicine 1171 in the medicine bag 1170 disposed above spills out or disinfects the disinfectant used in the vicinity. This is because there is something to do.

The elements arranged in the main body case 1002 of the infusion pump 1001 will be described.
As shown in FIGS. 6 and 7, a display unit 1003 and an operation panel unit 1004 are arranged on the upper portion 1002 </ b> A of the main body case 1002. In FIG. 7, the display unit 1003 includes, as an example, a display column 3B for a scheduled dose (mL) of drug administration, a display column 3C for an integrated amount (mL) of drug administration, a display column 3D for a charge history, and a flow rate (mL). A display column 3E and the like are displayed.
The operation panel unit 1004 is disposed on the right side of the display unit 1003 in the upper portion 1002A of the main body case 1002. The operation panel unit 1004 includes, for example, a pilot lamp 4A, a fast-forward switch button 4B, and a start button in the illustrated example. A switch button 4C, a stop switch button 4D, a menu selection button 4E, and the like are arranged. The power switch button is arranged at a position different from the operation panel unit 4.

As shown in FIG. 6, an opening / closing cover 1005 as a lid member is provided on the lower portion 1002B of the main body case 1002 so as to be openable and closable in the R direction around the rotation shaft 1005A. An infusion tube 1200 made of a flexible thermoplastic resin such as soft vinyl chloride is set in the tube mounting portion 1050 of the lower portion 1002B on the inner surface side of the opening / closing cover 1005, and the opening / closing cover 1005 is closed. Thus, the infusion tube 1200 can be attached to the tube attachment portion 1050 horizontally along the X direction.
As shown in FIG. 7, an infusion tube setting direction for clearly displaying the T direction, which is the correct liquid feeding direction, when the infusion tube 1200 is set on the surface of the opening / closing cover 1005, if necessary. A display unit 1150 is provided. The infusion tube setting direction display unit 1150 includes a drug bag display unit 1151 that displays the drug bag side, a patient side display unit 1152 that displays the patient side, and a liquid supply direction display unit 1153 that clearly indicates the liquid supply direction of the drug. .

As shown in FIG. 7, the drug bag display unit 1151 is arranged to visually confirm that the drug bag 1170 side of the infusion tube 1200 comes to the right side of the opening / closing cover 1005, and the patient side display unit 1152 It arrange | positions in order to confirm visually that the patient P side of the infusion tube 1200 is located in the left side part toward the opening / closing cover 1005.
And the liquid feeding direction display part 1153 is arrange | positioned in order to clearly show the liquid feeding direction (T direction) of the chemical | medical agent 1171 by the infusion tube 1200 set inside the opening / closing cover 1005, and a chemical | medical agent bag display part It is an arrow along the T direction from 1151 toward the patient side display unit 1152. 6 and 7, the X direction, the Y direction, and the Z direction are orthogonal to each other, and the Z direction is the vertical direction. The X direction is parallel to the T direction and is the left-right direction of the infusion pump 1, and the Y direction is the front-rear direction of the infusion pump 1.

The tube mounting portion 1050 is provided along the X direction below the display portion 1003 and the operation panel portion 1004. As shown in FIG. 7, the tube mounting portion 1050 can cover the opening / closing cover 1005 with the opening / closing cover 1005 when the opening / closing cover 1005 is closed in the CR direction around the rotation shaft 1005A. As described above, the medical staff can close the opening / closing cover 1005 by mounting the infusion tube 1200 on the tube mounting portion 1050 while confirming information on the display portion 1003 of the upper portion 1002A of the main body case 1002. . Then, the medical staff can operate the operation buttons on the operation panel unit 1004 while confirming information on the display unit 1003 of the upper portion 1002A of the main body case 1002.
As shown in FIG. 7, the main body case 1002 includes a tube mounting portion 1050 indicated by a broken line, a bubble sensor 1051, an upstream blockage sensor 1052, a downstream blockage sensor 1053, a first infusion tube guide portion 1054 on the right side, and a left side. The second infusion tube guide portion 1055 at the position and the opening / closing cover 1005 are provided. A tube clamp portion 270 is disposed on the tube mounting portion 1050.
The infusion pump 1001 has a main body case 1002 which is also referred to as a main body or a casing, and the main body case 1002 is integrally formed of a molded resin material having chemical resistance, and is configured by assembling a front cover 1002F and a rear cover 1002R. ing.

Next, with reference to FIG. 8, the structure of the front cover 1002F and the rear cover 1002R and the splash-proof and drip-proof (waterproof) treatment structure will be described.
FIG. 8 is an exploded perspective view showing a structural example of a front cover 1002F, a rear cover 1002R, and a seal member 1500 as a splash-proof and drip-proof (waterproof) treatment structure.
A main body case 1002 shown in FIG. 1 is configured by assembling a front cover 1002F that is a first case portion and a rear cover 1002R that is a second case portion. The depth dimension G1 of the front cover 1002F is larger than the depth dimension G2 of the rear cover 2R. A front cover 1002F shown in FIG. 8 includes circuit elements and a storage space 1450 for a display unit.
The accommodation space 1450 of the front cover 1002F illustrated in FIG. 8 includes a display unit 1003, a control unit (not illustrated) illustrated in FIG. 7, a fast-forward switch button 4B, a start switch button 4C, a stop switch button 4D, and a menu selection button 4E. Etc. are accommodated.

  On the other hand, the rear cover 2 </ b> R shown in FIG. 8 has a battery housing portion 1119 that detachably houses the battery 1113 shown in FIG. 3, and this battery housing portion 1119 can be opened and closed by a cover 1118. In addition, the rear cover 1002R has a fixing portion (not shown) for fixing an attachment (not shown) for detachably fixing the infusion pump 1001 to, for example, a pole (not shown). . The rear cover 1002R has a size that can cover the entire accommodation space 1450 of the front cover 1002F.

A seal member 1500 shown in FIG. 8 is an endless packing, and is made by molding a material that can be elastically deformed by crushing, for example, silicone rubber or synthetic rubber. The seal member 1500 has a function of sealing the accommodation space portion 1450 of the front cover 1002F of the front cover 1002F and the accommodation space portion 1454 of the rear cover 2R in a liquid-tight state by being sandwiched between overlapping edge portions of the front cover 1002F and the rear cover 1002R. Have
The seal member 1500 has portions 1501, 1502, 1503, 1504, 1505, 1506. The parts 1501, 1503 and 1505 are parallel, and the parts 1504 and 1506 are parallel. The portion 1502 is inclined with respect to the portion 1501. The parts 1501, 1502, 1503, 1504, 1505, 1506 are mounted in correspondence with the sealing target parts 1551, 1552, 1553, 1554, 1555, 1556 of the front cover 2F, respectively. The portions 1501, 1502, 1503, 1504, 1505, 1506 are mounted in correspondence with the sealing target portions 1571, 1572, 1573, 1574, 1575, 1576 of the rear cover 1002R, respectively.

FIG. 9 shows sealing target portions 1551, 1572, 1573, 1574, 1575, and 1576, which are joint portions between the front cover 1002F and the sealing target portions 1551, 1552, 1553, 1554, 1555, and 1556 and the rear cover 1002R. FIG. 10 is a cross-sectional view showing an example of a state where the sealing member 1500 is joined in a liquid-tight state. In FIG. 9, the right side shows the accommodating space portions 1450 and 1451 of the main body case 1002, and the left side shows the outside of the main body case 2.
The sealing target portions 1551, 1552, 1553, 1554, 1555, 1556 have a convex portion 1580 and an accommodating portion 1581 formed continuously to the convex portion 1580. The accommodating portion 1581 has an L-shaped cross section. On the other hand, the sealing target portions 1571, 1572, 1573, 1574, 1575, 1576 have a concave portion 1590 and a convex portion 1591. A fitting hole portion 1592 is formed in the convex portion 1591.

The seal member 1500 preferably has a U-shaped or U-shaped cross section. The seal member 1500 has a first portion 1501, a second portion 1502, and a connection portion 1503. A projecting portion 1504 is formed on the outer surface 1505 of the connection portion 1503.
When the front cover 1002F and the rear cover 1002R are joined via the seal member 1500, the convex portion 1590 of the front cover 1002F and the concave portion 1580 of the rear cover 1002R are joined by abutment. The accommodating portion 1581 of the front cover 1002F and the convex portion 1591 of the rear cover 2R accommodate the first portion 1501 of the seal member 1500 and most of the connecting portion 1503. The second portion 1502 is accommodated in the cover rib 1002N. The protruding portion 1504 is formed along the longitudinal direction 1500L of the seal member 1500. The protruding portion 1504 is a portion that fits into the fitting hole 1592 of the rear cover 1002R.

As described above, since the convex portion 1580 of the front cover 1002F and the concave portion 1590 of the rear cover 1002R are brought into contact with each other, the seal member 1500 is hidden from the direction of the arrow RN, and thus the front cover 1002F. The appearance of the joint portion between the rear cover 1002R and the rear cover 1002R is improved.
Note that the ratio of the height 1504H to the width 1504W of the protrusion 1504 shown in FIG. 9 is preferably 1: 1. By setting the ratio of the height 1504H and the width 1504W of the protruding portion 1504 to 1: 1, even if the protruding portion 1504 is pressed in the fitting hole portion 1592 of the rear cover 1002R, the protruding portion 1504 is difficult to fall. Yes.

The protruding portion 1504 is formed along the longitudinal direction 1500L of the seal member 1500, and the rear cover 1002R is formed with the insertion hole 1592 along the longitudinal direction 1500L, as shown in FIG. This is because the total width MW of the rear cover 2R is about 3 mm, for example, and the width SW that contributes to mechanically crushing the seal member 500 by the front cover 2F and the rear cover 2R is as thin as about 2 mm, for example. The reason why the total width MW of the front cover 1002F and the rear cover 1002R is set to be relatively thin is to reduce the weight of the infusion pump 1001.
For this reason, if the protruding portion 1504 is not formed, the entire outer surface (bottom surface) of the connecting portion 1503 of the seal member 1500 is pressed against the convex portion 1591 of the rear cover 1002R to obtain liquid-tight performance. Then, the following problem occurs. That is, the repulsive force from the entire outer surface (bottom surface) of the connecting portion 1503 of the seal member 1500 gives a mechanical load to the thin front cover 1002F and the rear cover 1002R, and the front cover 1002F and the rear cover 1002R are joined. May cause mechanical deformation of the part. In addition, there is a concern that cracks may occur in the joint portion between the front cover 1002F and the rear cover 1002R, and a gap may occur in the joint portion between the front cover 1002F and the rear cover 1002R that is not screwed. In these cases, it becomes impossible to ensure liquid-tight performance against chemicals and moisture at the joint between the front cover 1002F and the rear cover 1992R.

If the height 1500H of the protruding portion 1504 is too large, the protruding portion 1504 may fall in a state where it is fitted in the fitting hole portion 1592, and the sealing performance may not be exhibited. In addition, if the height 1504H of the protruding portion 1504 is too small, there is a portion where the surface pressure of the connecting portion 1503 with respect to the convex portion 1591 becomes excessive when the crushing amount becomes large due to the crossing variation of the sealing material 1500. Accordingly, the height 1504H of the protruding portion 504 is preferably, for example, 0.6 mm.
Since the seal member 1500 is interposed at the joint portion between the front cover 1002F and the rear cover 1002R shown in FIG. 9, even if a drug or moisture enters the RN direction, the convex portion 1590 of the front cover 1002F and the concave portion 1580 of the rear cover 1002R. Since the protrusions 1504 are continuously formed over the entire circumference along the longitudinal direction 1500L of the seal member 10500 and are fitted into the fitting holes 592 on the rear cover 1002R side, It is possible to reliably prevent the medicine and moisture from entering the front cover 1002F and the rear cover 1002R.

Accordingly, the above-described elements arranged inside the front cover 1002F and the rear cover 1002R, that is, the display unit 1003, the control unit, the display unit driver, the speaker, the communication port, the fast-forward switch button 4B, the start switch button 4C, and the stop switch button The 4D, the menu selection button 4E, the battery, and the like can be surely protected from the invasion of medicines and moisture. For this reason, it is possible to eliminate the phenomenon that the infusion pump 1001 stops its operation or malfunctions, and the inconvenience that the liquid feeding operation of the medicine stops can be eliminated.
In the electronic device of the present invention described above, the first portion of the sealing member is disposed inside the joint portion of the main body case, so that the sealing member is not visible at all from the outside of the main body case, and the appearance is improved. In addition, the seal member can prevent the medicine and moisture from entering the main body case from the joint portion of the main body case.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the claims. A part of each configuration of the above embodiment can be omitted, or can be arbitrarily combined so as to be different from the above.
As an embodiment of the present invention described above, a syringe pump or an infusion pump, which is a medical pump used in an environment where chemicals or moisture is used, is given as an example of an electronic device. Applies to electronic devices in other fields, such as surveying instruments, digital cameras, and portable terminals.

  DESCRIPTION OF SYMBOLS 1 ... Syringe pump (an example of an electronic device), 2,1002 ... Main body case, 2F., 1002F .. Front cover, 2R, 1002R ... Rear cover, 500, 1500 ... Seal member, 501, 1501... First part of seal member, 502 and 1502. Second part of seal member, 503 and 1503... Connection part of seal member, 504 and 1504... Projection part, 551, 552 and 553 , 554, 555, 556... Sealing target part (joint part) of the front cover, 571, 572, 573, 574, 575, 576... Sealing target part (joining part) of the rear cover, 592, 1592. Insertion hole, 1001 ... Infusion pump (an example of electronic equipment)

Claims (6)

A sealing member arranged to ensure the liquid-tight performance of the joint portion of the main body case of the electronic device,
A first portion that has a U-shaped cross section and is disposed inside the joint portion of the main body case; and a second portion that is disposed inside the joint portion with a distance from the first portion; A sealing member comprising: a connecting portion that connects the first portion and the second portion.   The seal member according to claim 1, wherein a projecting portion that is fitted into a fitting hole portion formed in the joint portion of the main body case is formed in the connection portion of the seal member.   The main body case includes a front cover and a rear cover joined to the front cover at the joining portion, and the seal member is an endless member disposed along the joining portion of the front cover and the rear cover. The seal member according to claim 1, wherein the seal member is a seal member.   The electronic device is a medical pump, and the medical pump is provided in the main body case, and is provided in the main body case, a tube mounting portion for horizontally mounting an infusion tube for infusing the medicine in the medicine bag to the patient side, and the main body case. In the state where the infusion tube is mounted in the lateral direction, a liquid feeding drive unit for feeding the drug by peristating the infusion tube by peristalsis, and closing the tube mounting unit and the The seal member according to any one of claims 1 to 3, wherein the seal member is an infusion pump having an opening / closing cover that covers the liquid feeding drive unit.   The electronic device is a medical pump, and the medical pump is provided in the main body case, and is provided in the main body case, and a syringe housing portion in which a transfusion tube for transfusing the medicine in the syringe to the patient side is mounted in the lateral direction. The syringe pump has a syringe pusher driving unit that pushes the pusher of the syringe and feeds the medicine in the syringe while the infusion tube is mounted in the lateral direction. The seal member according to claim 1. An electronic device comprising a seal member arranged to ensure the liquid tightness of the joint portion of the main body case,
The sealing member is
A first portion that has a U-shaped cross section and is disposed inside the joint portion of the main body case; and a second portion that is disposed inside the joint portion with a distance from the first portion; An electronic device comprising: a connecting portion that connects the first portion and the second portion.

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