JP2000140091A - Medical pump unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise produced from the suction port and delivery port of a pump and cool effectively the pump without enlarging the structure thereof. SOLUTION: In a medical pump unit having a pump 1 that is installed in the casing of equipment used in combination with a medical instrument, and performs force delivery or suction, the pump 1 having a suction port and a delivery port 8, a housing 2 and 3 housing the pump in a nearly closed state and a supporting means to support the pump 1 in the casing through a supporting member 4 made of an elastic body are equipped, and the housing surrounds the pump with a plurality of walls, and a vent hole 12 is formed through the wall 2b other than the wall 2a facing the suction port and the delivery port of the pump.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical pump unit provided in various devices such as a light source device and used for performing air supply, water supply, suction and the like in medical treatment.

[0002]

2. Description of the Related Art Generally, an endoscope is used to observe an organ in a body cavity by inserting an elongated insertion portion into the body cavity, or to insert a treatment instrument into the body cavity through a treatment instrument channel formed in the insertion portion. , Various treatments and treatments can be performed. The distal end of the insertion section of the endoscope is provided with a distal end component in which various optical elements are disposed. In addition, the endoscope is provided with a light guide formed of a fiber bundle as an illumination light transmitting unit. One end of the light guide is located on an end surface of an illumination lens of an illumination optical system arranged in the distal end component.

When an inspection, observation or treatment is performed by using such an endoscope, a peripheral device such as a camera control unit or a control device such as a camera control unit or the like is connected to the other end of the light guide so as to be internally guided through the light guide. A light source device that supplies illumination light to the tip of the endoscope, a monitor that displays an endoscopic image of the inspected site, and the like are required. Further, for example, an ultrasonic therapy apparatus that crushes and aspirates a diseased tissue in a living body by ultrasonic vibration is also used.

In general, a pump unit as an air / water supply source is mounted inside the light source device. This pump unit sends, for example, a cleaning liquid (water or the like) for washing away a body fluid, blood, or the like attached to a lens cover covering an objective lens of an observation optical system disposed at a distal end component, or a lens cover. It is used when supplying gas (air or the like) for removing water droplets attached to the air, or supplying gas for expanding the inside of a body cavity.

[0005] Such a pump unit is also used in a treatment using the above-described ultrasonic treatment apparatus. Ultrasound therapy devices crush or emulsify the affected tissue by contacting the distal end of the probe with the desired affected tissue and transmitting ultrasonic vibrations to the distal end of the probe. In the treatment using the perfusion solution, a perfusate such as physiological saline is supplied around the affected tissue in contact with the probe, and the affected tissue or the like crushed or emulsified by ultrasonic vibration is provided at the tip of the probe together with the perfusate. It is always sucked and removed through the opening provided and the suction passage of the handpiece communicating with the opening. In laparotomy and brain surgery, it is extremely important to secure the operative field and perform a reliable operation by aspirating and removing tissues, blood, and physiological saline accumulated around the affected tissue. A pump unit is used to supply the liquid.

Usually, various noises are generated from the pump (mechanical noise due to driving of the pump, noise due to pressure fluctuation of the gas at the suction and discharge ports of the pump, noise due to vibration transmitted from the pump, etc.). However, since various devices such as a light source device equipped with a pump unit are mainly used in a hospital room, when noise is emitted from the pump, it causes a lack of concentration of the surgeons and a conversation between the surgeons. It is difficult to obtain important auditory information for performing observation and treatment, such as signal sounds emitted from the system and the system, and it may not be possible to complete examination and treatment smoothly. Therefore, the air supply / water supply pump incorporated in the light source device and the suction pump in the ultrasonic treatment device have been devised to suppress noise.

For example, Japanese Utility Model Publication No. 3-46749 discloses a structure that suppresses mechanical noise caused by driving a pump and noise caused by fluctuations in gas pressure at the outlet of the pump. Further, Japanese Patent Application No. 9-3444631 discloses a technique for suppressing noise caused by fluctuations in gas pressure at the outlet of a pump. Further, Japanese Patent Application No. 9-107897 discloses a structure for suppressing noise due to vibration transmitted from a pump.

[0008]

However, according to the technique disclosed in Japanese Utility Model Publication No. 3-46749, the noise at the outlet of the pump connected to the medical equipment can be suppressed, but the noise at the outlet of the pump can be reduced. The noise generated from the suction port of the pump cannot be suppressed. In addition, since the pump is installed in the sealed case, if the pump itself generates heat by driving, there is no place for heat to escape, and the life of the pump may be significantly reduced.

In the technique disclosed in Japanese Patent Application No. 9-346331, a long pipe is used to suppress noise caused by gas pressure fluctuation at a pump outlet. Therefore, a large space is required.

In the technique disclosed in Japanese Patent Application No. 9-107897, vibration noise due to driving of the bomb can be suppressed, but noise due to gas pulsating flow cannot be suppressed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to suppress the noise generated from the inlet and outlet of the pump without increasing the size of the structure. It is another object of the present invention to provide a medical pump unit capable of efficiently cooling a pump.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a medical device having a pump installed in a housing of a device used in combination with medical equipment and for performing a pumping or suctioning operation. The pump unit, comprising: a pump having a suction port and a delivery port; a housing for accommodating the pump in a substantially sealed state; and support means for supporting the pump in the housing via a support member made of an elastic body. The housing is characterized in that the housing is surrounded by a plurality of wall surfaces, and a vent hole is provided through a wall surface other than the wall surface facing the suction port and the delivery port of the pump.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 3 show a first embodiment of the present invention. The pump unit according to the present embodiment is installed in the housing of various devices such as a light source device, and includes a pump 1, a housing formed by an upper sealed case 2 and a lower sealed case 3, an anti-vibration member 4, and a connecting member. 5 and an airtight member 6.

As clearly shown in FIG. 2, the pump 1
Is supported on the lower sealed case 3 through a plurality of vibration isolating members 4 as elastic bodies having a shape in which a plurality of cones are vertically connected. In this case, the lower end of each anti-vibration member 4 projects downward from the bottom surface of the lower sealed case 3 and is fixed on, for example, a support surface of a housing of a device (light source device or the like) on which the pump unit is mounted. The pump 1 has a suction port 7 and a delivery port 8, and both the suction port 7 and the delivery port 8 are open in the same direction. Either the suction port 7 or the delivery port 8 of the pump 1 (the delivery port 8 in the present embodiment, and therefore the pump 1 of the present embodiment is used as a pressure pump) is connected to one of the connecting members 5. The other end of the pipe 9 is connected through a pipe 10 to an air / water supply pipe of an endoscope as a medical device or a suction path of an ultrasonic probe as a medical device. .

As clearly shown in FIG. 2, the upper sealed case 2 has a first side wall 2a facing the inlet 7 and the outlet 8 of the pump 1, and an opposite side facing the first side wall 2b. And the second side wall 2b. Second side wall 2b
Is provided with a through hole 12.

The connecting member 5 is made of, for example, a rectangular plate. A concave fitting groove 40 is formed on the entire peripheral surface of the connecting member 5. The upper sealing case 2 and the lower sealing case 3 are assembled together by fitting the wall surfaces 2a, 3a into the fitting grooves 40 of the connecting member 5 (see FIG. 2). The outer periphery of the lower sealed case 3 joined to the upper sealed case 2 is provided with an upper sealed case 2.
A step 42 which is one size larger than that is provided, and the upper sealed case 2 is fitted into the step 42 via the airtight member 6 and fastened with the screw 11. Airtight member 6
Is made of an elastic body and has the same shape as the outer periphery (joining surface) of the lower sealing case 3 to which the upper sealing case 2 is joined.

In the pump unit of the present embodiment having the above-described structure, the pump 1 is supported by the vibration isolating member 4 made of an elastic material. , 3 are not transmitted to the housing of the device (light source device or the like) in which they are installed.

Further, in the pump unit of the present embodiment, the pump 1 is installed in the sealed cases 2 and 3 and has high airtightness by the connecting member 5 and the airtight member 6. The driving noise of the sealed case 2 and 3
Is not transmitted to the outside.

Further, in the pump unit of the present embodiment, since the through hole 12 is provided in the second side wall 2b which is not opposed to the opening of the suction port 7 and the outlet of the pump 8, the through hole 12 is provided. The gas flowing between the airtight container and the suction port 7 or the discharge port 8 (in this embodiment, the suction port 7) convects over the entire space in the sealed cases 2 and 3. Therefore, a high pressure buffering action is generated, and the pulsation of the gas flowing between the through hole 12 and the suction port 7 is canceled (the pulsation of the gas can be smoothed by the pressure buffering action), and at the same time, the gas is heated by the heat generated by the pump 1. The gas is discharged out of the sealed cases 2 and 3 without being trapped in the sealed cases 2 and 3. Therefore, the noise generated by the operation of the pump 1 can be suppressed without increasing the size of the structure, and the pump 1 can be cooled efficiently.

That is, according to the pump unit of this embodiment, the pump 1 can be efficiently cooled because new gas always enters the cases 2 and 3, and the cases 2 and 3 themselves serve as chambers. Therefore, noise from the suction port 7 can be reduced without attaching a muffler to the suction port 7 of the pump 1.

FIGS. 4 and 5 show a second embodiment of the present invention. The pump unit according to the present embodiment is characterized in that the separation distance between the pump 1 and the cases 2 and 3 is set within a predetermined range. The other configuration is the same as that of the first embodiment.

4 and 5, the dashed line indicates the pump 1
The maximum amplitude of the pump 1 when the pump 1 vibrates and the vibration isolating member 4 elastically deforms (oscillates) only by its own drive, and the two-dot chain line indicates that the vibration isolating member 4 is damaged. It shows the maximum amplitude of the pump 1 when elastically deforming (oscillating) to the maximum without any change. As can be seen from the figure, in the present embodiment, the distance between the pump 1 and the cases 2 and 3 is set so that the inner wall surfaces of the sealed cases 2 and 3 exist in the region sandwiched by the alternate long and short dash line. The distance is set. In addition, at least a portion of the pipe 9 provided in the connecting member 5 protruding outside the sealed cases 2 and 3 is formed of a rigid body.

In the pump unit of this embodiment configured as described above, since the inner wall surfaces of the sealed cases 2 and 3 are present in a region sandwiched between the alternate long and short dash line, Even if the pump 1 vibrates greatly due to an impact (vibrates greatly during transportation or the like), the pump 1 abuts against the sealed cases 2 and 3, so that the vibration isolator 4 is not deformed beyond the maximum deformation amount and is not damaged. In addition, since the portion of the pipe 9 protruding outside the sealed cases 2 and 3 is formed of a rigid body, the pipe 10 is curved in the housing of the device (light source device or the like) in which the sealed cases 2 and 3 are installed. Even if it is drawn around, the restoring force does not reach the pump 1, and the pump 1 always maintains a desired positional relationship with respect to the sealed cases 2, 3. Therefore, the separation distance between the sealed cases 2 and 3 and the pump can be set to the minimum within the above-mentioned predetermined range (there is no need to allow for the size of the inner wall surfaces of the cases 2 and 3). The size can be reduced. In addition, since the volume occupied by the gas in the cases 2 and 3 is small,
The time for gas to accumulate in Cases 2 and 3 is short.
The gas in 3 is replaced with the gas newly entering from the through hole 12 (when the pump 1 functions as a suction pump, the gas is discharged through the through hole 12) in a short time. Therefore, the cooling effect of the pump 1 is high.

FIG. 6 shows a third embodiment of the present invention. In the pump unit according to the present embodiment, the through hole 12 is formed in the bottom surface of the lower sealed case 3, and the lower sealed case 3 is attached to a chassis of a casing (not shown) via a rod member 13. I have. Also, the first side wall 2 a facing the suction / outlet ports 7, 8 of the pump 1 when viewed from the through hole 12 is provided on the bottom surface of the lower sealed case 3 so that the gas flows over the entire inside of the sealed cases 2, 3. A partition 14 is provided upright on the side close to.

In the chassis, a plurality of through holes or slits communicating with the outside air are provided in the periphery facing the through hole 12. In this case, a cooling device such as a fan may be attached to the chassis. The other configuration is the same as that of the first embodiment.

In the pump unit of the present embodiment thus configured, when the pump 1 operates as a pumping device, a gas having a lower temperature than the gas in the sealed cases 2 and 3 passes through the through holes 12. The gas in the sealed cases 2 and 3 heated by the pump 1 is discharged through the air outlet 8 while being sucked into the sealed cases 2 and 3 through the outlet 1. Therefore, the pump 1 can be cooled effectively.

When the pump 1 operates as a suction device, the gas in the sealed cases 2 and 3 is discharged through the through holes 12. At this time, if the temperature difference between the gas inside and outside the sealed cases 2 and 3 is small, the heat of the gas is hardly transmitted to the gas outside the sealed cases 2 and 3 and the pump 1 cannot be cooled effectively. Since the temperature of the gas outside the casings 2 and 3 is low, the gas in the casings 2 and 3 can be simultaneously discharged with heat, so that the pump 1 can be effectively cooled.

According to the technical contents described above, the following various configurations can be obtained.

1. In an endoscope apparatus provided with a pump for performing air supply and water supply or suction, a case of a case containing a pump, which is connected to a housing and is not connected to a device for performing a medical procedure, is connected to the pump. An endoscope apparatus characterized in that a through hole is formed in a wall surface that does not face a suction / delivery port.

2. The size of the inner wall of the case in which the pump is incorporated via a deformable vibration isolating member is smaller than the position of the pump when the pump is deformed by the maximum amount of the elastic member, and larger than the position of the pump due to the drive vibration of the pump itself. 2. The endoscope apparatus according to claim 1, wherein:

3. The pump according to claim 1, wherein a through-hole communicating with a vent of the pump is formed in a case where a gas outside the case having a gas temperature lower than the gas temperature inside the case exists in the case containing the pump. The endoscope apparatus according to claim 1.

[0033]

As described above, according to the medical pump unit of the present invention, it is possible to suppress the noise generated from the inlet and the outlet of the pump without increasing the size of the structure, and to reduce the noise. Can be cooled efficiently.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a medical pump unit according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the medical pump unit of FIG. 1;

FIG. 3 is a cross-sectional view of the medical pump unit of FIG. 1;

FIG. 4 is a longitudinal sectional view of a medical pump unit according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of the medical pump unit of FIG. 2;

FIG. 6 is a longitudinal sectional view of a medical pump unit according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pump 2 ... Upper sealed case (housing) 2a, 2b ... Side wall (wall surface) 3 ... Lower sealed case (housing) 4 ... Vibration-proof member (support member) 7 ... Suction port 8 ... Outlet 12 ... Through hole (through) Stoma)

Claims (1)

[Claims] 1. A medical pump unit which is installed in a housing of an apparatus used in combination with a medical device and has a pump for performing pressure feeding or suction, comprising: a pump having an inlet and an outlet; A housing for storing the pump in a substantially sealed state, and a support means for supporting the pump in the housing via a support member made of an elastic body, wherein the housing surrounds the pump with a plurality of wall surfaces, and a suction port of the pump. And a vent hole is provided through a wall surface other than a wall surface facing the delivery port.