JP2020199099A - Syringe pump - Google Patents

Abstract

To more reliably acquire data related to a fitted syringe while restraining an increase in size of a syringe pump.SOLUTION: An antenna part 160 can transmit an electromagnetic wave to a response part 40 of a barrel 20 placed on a barrel receiving part 110, and can receive data sent from the response part 40 in response to the transmitted electromagnetic wave. Respective detection signals of a first detection part and a second detection part and the data received by the antenna part 160 are inputted into a control unit. After the detection signals meeting setting conditions are inputted into the control unit from both the first detection part and the second detection part, the antenna part 160 transmits the electromagnetic wave, and the data received by the antenna part 160 is inputted into the control unit.SELECTED DRAWING: Figure 1

Description

The present invention relates to a syringe pump.

JP-A-2019-63253 (Patent Document 1) is a prior document that discloses the configuration of a syringe pump. The syringe pump described in Patent Document 1 includes an antenna portion and a distance variable mechanism. The antenna unit can emit electromagnetic waves toward the cylinder member provided with the response unit in the syringe held in the holding space, and can receive the data transmitted from the response unit that responds to the transmitted electromagnetic waves. .. The distance variable mechanism can change the distance of the antenna portion from the holding space.

JP-A-2019-63253

In the syringe pump described in Patent Document 1, by changing the distance between the antenna portion and the response portion, the possibility of erroneously acquiring data from the response portion of the syringe not attached to the syringe pump is reduced. As a result, the possibility of acquiring data from the response part of the syringe mounted on the syringe pump is increased. In this configuration, the antenna unit and the response unit must be arranged so as to be out of the communication range with each other, and the syringe pump becomes large. Further, in the case of a configuration in which the posture of the antenna portion is changed, or in the case of a configuration in which a plurality of antenna portions are provided, the syringe pump becomes large.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a syringe pump capable of more reliably acquiring data on a mounted syringe while suppressing an increase in size.

A syringe pump based on the present invention has a barrel having a first flange at the rear end, a response portion provided on the surface of the barrel and responding to electromagnetic waves, and a second flange fitted inside the barrel and having a second flange at the rear end. It is a syringe pump applied to a syringe containing a plunger rod having a flange. The syringe pump includes a barrel receiving portion, a groove portion, a driving unit, a first detection unit, a second detection unit, an antenna unit, and a control unit. A barrel is placed on the barrel receiving portion. The groove portion is provided at the rear end of the barrel receiving portion, and the first flange is inserted. The drive unit movably holds the plunger rod towards the barrel. The first detection unit detects that the barrel is placed on the barrel receiving unit. The second detection unit detects that the plunger rod is held by the drive unit. The antenna unit can transmit electromagnetic waves to the response unit of the barrel mounted on the barrel receiving unit, and can receive data transmitted from the response unit in response to the transmitted electromagnetic waves. The control unit inputs the detection signals of the first detection unit and the second detection unit, and the data received by the antenna unit. After a detection signal satisfying the setting conditions is input to the control unit from both the first detection unit and the second detection unit, the antenna unit emits an electromagnetic wave, and the data received by the antenna unit is input to the control unit.

In one embodiment of the present invention, the drive unit has a pressing surface that presses the second flange and a movable claw portion that holds the second flange by sandwiching it with the pressing surface. The second detection unit detects the sandwiching distance between the pressing surface and the movable claw portion of the second flange.

In one embodiment of the present invention, the control unit determines that the detection signal from the second detection unit satisfies the above setting condition when the sandwiching interval is equal to or greater than the first threshold value and is equal to or less than the second threshold value.

In one embodiment of the present invention, the syringe pump further includes a barrel holding unit and a third detecting unit. The barrel holding portion holds the barrel mounted on the barrel receiving portion. The third detection unit detects the holding state of the barrel in the barrel holding unit. The detection signal of the third detection unit is input to the control unit. After the detection signals satisfying the setting conditions are input to the control unit from all of the first detection unit, the second detection unit, and the third detection unit, the antenna unit emits an electromagnetic wave, and the above data received by the antenna unit is the control unit. Is entered in.

In one embodiment of the present invention, the barrel holding portion is rotatably provided. When the rotation angle of the barrel holding unit is equal to or greater than the third threshold value and equal to or less than the fourth threshold value, the control unit determines that the detection signal from the third detection unit satisfies the above setting condition.

According to the present invention, it is possible to more reliably acquire data on a syringe mounted while suppressing the size of the syringe pump from becoming large.

It is a perspective view which shows the appearance of each of the syringe pump which concerns on one Embodiment of this invention, and the syringe attached to the syringe pump. FIG. 5 is a plan view of the syringe pump of FIG. 1 as viewed from the direction of arrow II. It is a front view of the syringe pump of FIG. 1 as seen from the direction of arrow III. It is a side view of the syringe pump of FIG. 1 as seen from the direction of arrow IV. It is a block diagram which shows the control system of the syringe pump which concerns on one Embodiment of this invention. It is a partial perspective view which shows the state which the barrel holding part was rotated upward in the syringe pump which concerns on one Embodiment of this invention. It is a partial perspective view which shows the state which the barrel of a syringe is placed on the barrel receiving part in the syringe pump which concerns on one Embodiment of this invention. It is a partial perspective view which shows the state which the 2nd flange is held by the movable claw part in the syringe pump which concerns on one Embodiment of this invention. It is a partial perspective view which shows the state which the barrel holding part was rotated downward in the syringe pump which concerns on one Embodiment of this invention. It is a flowchart which shows the control flow of the antenna part by the control part of the syringe pump which concerns on one Embodiment of this invention. It is a front view which shows the state which a plurality of syringe pumps which concerns on one Embodiment of this invention are attached to one stand.

Hereinafter, the syringe pump according to the embodiment of the present invention will be described with reference to the drawings. In the following description of the embodiment, the same or corresponding parts in the drawings are designated by the same reference numerals, and the description will not be repeated.

FIG. 1 is a perspective view showing the appearance of a syringe pump according to an embodiment of the present invention and a syringe mounted on the syringe pump. FIG. 2 is a plan view of the syringe pump of FIG. 1 as viewed from the direction of arrow II. FIG. 3 is a front view of the syringe pump of FIG. 1 as viewed from the direction of arrow III. FIG. 4 is a side view of the syringe pump of FIG. 1 as viewed from the direction of arrow IV.

As shown in FIG. 1, the syringe pump 100 according to the embodiment of the present invention is a syringe pump applied to the syringe 10. The syringe 10 includes a barrel 20 and a plunger rod 30.

The barrel 20 has a substantially cylindrical outer shape. A liquid injection port 22 is provided at the tip of the barrel 20. A first flange 21 is provided at the rear end of the barrel 20. A response unit 40 is provided on the surface of the barrel 20. The barrel 20 is made of a transparent or translucent resin such as polypropylene. Lubricating oil such as silicone oil may be applied to the inner peripheral surface of the barrel 20. The inside of the barrel 20 is filled with a chemical solution.

In the present embodiment, the response unit 40 is composed of an RFID (Radio Frequency Identification) tag attached to the outer peripheral surface of the barrel 20. The RFID tag has a circuit chip and a sheet-shaped loop antenna connected to the circuit chip, and wirelessly transmits data recorded on the circuit chip by electromagnetic induction of the loop antenna.

The data recorded on the circuit chip includes information on each of the barrel 20 and the plunger rod 30, information on the chemical solution filled in the barrel 20, information on the administration conditions of the chemical solution, and the like.

The plunger rod 30 is fitted inside the barrel 20 and has a second flange 31 at the rear end. A gasket portion 32 that is in sliding contact with the inner peripheral surface of the barrel 20 is provided on the tip end side of the plunger rod 30. The gasket portion 32 is made of an elastic body such as vulcanized rubber or a thermoplastic elastomer. The portion of the plunger rod 30 other than the gasket portion 32 is made of a resin such as polypropylene.

As shown in FIGS. 1 to 4, the syringe pump 100 according to the embodiment of the present invention includes a barrel receiving portion 110, a groove portion 111, and a driving portion 120.

The barrel 20 is placed on the barrel receiving portion 110. The barrel receiving portion 110 has a concave portion that is in contact with the lower portion of the outer peripheral surface of the barrel 20. The groove portion 111 is provided at the rear end of the barrel receiving portion 110. The first flange 21 is inserted into the groove portion 111. The barrel receiving portion 110 and the groove portion 111 are integrally formed.

In the present embodiment, the antenna portion 160 is provided inside the barrel receiving portion 110. The antenna unit 160 can transmit an electromagnetic wave to the response unit 40 of the barrel 20 mounted on the barrel receiving unit 110, and can receive data transmitted from the response unit 40 in response to the transmitted electromagnetic wave. Is.

The antenna unit 160 has a sheet-shaped loop antenna. The antenna unit 160 emits an electromagnetic wave having directivity toward one side in the thickness direction of the antenna unit 160. Therefore, the barrel 20 is placed on the barrel receiving portion 110 so that the response portion 40 and the antenna portion 160 face each other. The other side of the antenna portion 160 in the thickness direction is covered with a shielding member capable of shielding electromagnetic waves. The antenna unit 160 wirelessly receives the data transmitted from the response unit 40 by electromagnetic induction.

The drive unit 120 has a pressing surface 121 that presses the second flange 31, and a movable claw portion 122 that sandwiches and holds the second flange 31 with the pressing surface 121. The movable claw portion 122 is urged in a direction approaching the pressing surface 121 by an urging mechanism such as a spring. The drive unit 120 movably holds the plunger rod 30 toward the barrel 20. The plunger rod 30 is moved toward the barrel 20 by the drive unit 120, so that the chemical solution in the barrel 20 is injected into the tube from the injection port 22.

The drive unit 120 further has a clutch lever 123 for manually adjusting the position of the drive unit 120 itself and the position of the movable claw portion 122 in the extending direction of the plunger rod 30 when the plunger rod 30 is attached / detached. doing. Specifically, by rotating the clutch lever 123 in one direction, the drive unit 120 is in a locked state in which manual movement is restricted, and the movable claw unit 122 is urged toward the pressing surface 121 side. It is maintained in a state of being. By rotating the clutch lever 123 in the other direction, the drive unit 120 is unlocked, and the movable claw unit 122 is moved so as to be separated from the pressing surface 121 against the urging force.

The configuration of the drive unit 120 is not limited to the above, and the drive unit 120 has a pressing surface 121 that presses the second flange 31 and a fixed claw portion that accommodates the second flange 31 between the pressing surface 121. You may be doing it.

In the present embodiment, the syringe pump 100 further includes a barrel holding portion 112. The barrel holding portion 112 is connected to the rotating shaft 113 so as to rotate in the vertical direction above the barrel receiving portion 110. The barrel holding portion 112 holds the barrel 20 mounted on the barrel receiving portion 110 in a state of being rotated and lowered. The barrel holding portion 112 does not necessarily have to be provided. Further, the antenna portion 160 may be provided on the inner peripheral side of the barrel holding portion 112 instead of the inside of the barrel receiving portion 110.

FIG. 5 is a block diagram showing a control system of a syringe pump according to an embodiment of the present invention. As shown in FIG. 5, the syringe pump 100 includes a first detection unit 130, a second detection unit 140, a control unit 150, and an antenna unit 160. In the present embodiment, the syringe pump 100 further includes an operation panel 180 and a third detection unit 190.

As shown in FIG. 2, the first detection unit 130 is provided at a position below the barrel holding unit 112 on the upper surface of the barrel receiving unit 110. The first detection unit 130 detects that the barrel 20 is placed on the barrel receiving unit 110. Specifically, the first detection unit 130 is composed of a pressing sensor pressed by the barrel 20. As shown in FIG. 5, the detection signal of the first detection unit 130 is input to the control unit 150.

The first detection unit 130 may be configured to detect that the barrel 20 is placed on the barrel receiving unit 110, and is not limited to the pressing sensor. For example, a movable claw portion capable of sandwiching the first flange 21 with the rear end surface of the barrel receiving portion 110 is provided, and the first detection unit 130 has the same configuration as the second detection unit 140 described later. A pressing sensor capable of detecting that the barrel is pressed by the first flange 21 and a positioning mechanism capable of detecting the pinching distance of the first flange 21 between the rear end surface of the barrel receiving portion 110 and the movable claw portion are included. You may.

As shown in FIG. 2, the second detection unit 140 is provided at a position between the pressing surface 121 and the movable claw unit 122. The second detection unit 140 detects the sandwiching distance between the pressing surface 121 and the movable claw portion 122 of the second flange 31. Specifically, the second detection unit 140 can detect the holding distance between the pressing sensor capable of detecting the pressing by the second flange 31 and the second flange 31 between the pressing surface 121 and the movable claw portion 122. Includes positioning mechanism.

The positioning mechanism includes, for example, a mechanism capable of detecting the amount of slide of the movable claw portion 122 with respect to the pressing surface 121 by using a variable resistance portion, a limit switch, a photoelectric sensor, or the like.

In the present embodiment, when the pinching distance between the pressing surface 121 and the movable claw portion 122 is equal to or greater than the first threshold value and equal to or less than the second threshold value, the control unit 150 sets the setting condition by the detection signal from the second detection unit 140. Judge that it meets. Each of the first threshold value and the second threshold value is preset according to the thickness of the second flange 31. Each of the set first threshold value and the second threshold value is stored in the control unit 150. As shown in FIG. 5, the detection signal of the second detection unit 140 is input to the control unit 150.

When the drive unit 120 has a pressing surface 121 that presses the second flange 31 and a fixed claw portion that accommodates the second flange 31 between the pressing surface 121, the second detecting unit 140 presses. It is provided at a position between the surface 121 and the fixed claw portion, and is composed of only a pressing sensor. In the second detection unit 140, when the second flange 31 is inserted between the pressing surface 121 and the fixed claw portion, the pressing sensor is pressed by the second flange 31, and the plunger rod 30 is driven by the driving unit 120. Detects that it is held in.

The third detection unit 190 detects the holding state of the barrel 20 in the barrel holding unit 112. Specifically, the third detection unit 190 is composed of a sensor capable of detecting the rotation angle of the barrel holding unit 112. The third detection unit 190 is composed of, for example, an encoder connected to the rotation shaft 113 or the like.

In the present embodiment, the control unit 150 determines that the detection signal from the third detection unit 190 satisfies the setting condition when the rotation angle of the barrel holding unit 112 is equal to or greater than the third threshold value and is equal to or less than the fourth threshold value. to decide. Each of the third threshold and the fourth threshold is preset according to the outer diameter of the barrel 20. Each of the set third threshold value and the fourth threshold value is stored in the control unit 150. As shown in FIG. 5, the detection signal of the third detection unit 190 is input to the control unit 150.

The third detection unit 190 may be composed of a pressing sensor that detects that the barrel holding unit 112 is pressing the barrel 20. The third detection unit 190 does not necessarily have to be provided.

As shown in FIG. 5, the control unit 150 is electrically connected to each of the first detection unit 130, the second detection unit 140, the third detection unit 190, the drive unit 120, the antenna unit 160, and the operation panel 180. There is.

As shown in FIGS. 1 and 2, in the syringe pump 100, the operation panel 180 is provided so as to be positioned parallel to the syringe 10 to be mounted. The operation panel 180 includes a display unit and an operation input unit. The information input from the control unit 150 is displayed on the display unit. The operation signal set in the operation input unit is input to the control unit 150.

The transmission of electromagnetic waves from the antenna unit 160 is controlled by the control unit 150. The data transmitted from the response unit 40 and received by the antenna unit 160 is input to the control unit 150.

Here, the operation when the syringe 10 is attached to the syringe pump 100 according to the embodiment of the present invention will be described.

FIG. 6 is a partial perspective view showing a state in which the barrel holding portion is rotated upward in the syringe pump according to the embodiment of the present invention. When attaching the syringe 10 to the syringe pump 100, first, as shown in FIG. 6, the barrel holding portion 112 is rotated upward.

FIG. 7 is a partial perspective view showing a state in which the barrel of the syringe is placed on the barrel receiving portion in the syringe pump according to the embodiment of the present invention. As shown in FIG. 7, the first flange 21 is inserted into the groove 111, and the barrel 20 is placed on the barrel receiving portion 110. At this time, the first detection unit 130 detects that the barrel 20 is placed on the barrel receiving unit 110 when the pressing sensor is completely pressed. The detection signal from the first detection unit 130 is input to the control unit 150.

In the present embodiment, when the barrel 20 is placed on the barrel receiving portion 110 in an insufficient state, the first detection unit 130 outputs a detection signal when the barrel 20 does not press the pressing sensor at all. In the state where the barrel 20 is incompletely pressing the pressing sensor, the first detection unit 130 outputs a detection signal indicating that the incomplete pressing does not satisfy the set condition. The first detection unit 130 may be configured to output a detection signal only when the pressing sensor is completely pressed. In this case, when the first detection unit 130 outputs the detection signal, the setting condition is satisfied.

FIG. 8 is a partial perspective view showing a state in which the second flange is held by the movable claw portion in the syringe pump according to the embodiment of the present invention. As shown in FIG. 8, the clutch lever 123 is rotated in the other direction to unlock the drive unit 120 and separate the movable claw unit 122 from the pressing surface 121. In that state, the second flange 31 is inserted between the pressing surface 121 and the movable claw portion 122 while manually moving the drive unit 120 so that the pressing surface 121 comes into contact with the second flange 31.

Next, by rotating the clutch lever 123 in one direction and returning it, the second flange 31 is sandwiched and held by the pressing surface 121 and the movable claw portion 122. By rotating the clutch lever 123 in one direction, the drive unit 120 is locked so as not to move manually. At this time, the second detection unit 140 detects the holding interval D of the second flange 31 between the pressing surface 121 and the movable claw portion 122. The detection signal from the second detection unit 140 is input to the control unit 150.

In the present embodiment, the control unit 150 determines that the detection signal from the second detection unit 140 satisfies the setting condition when the sandwiching interval D is equal to or greater than the first threshold value and is equal to or less than the second threshold value. When the pinching interval D is less than the first threshold value and the pinching interval D is larger than the second threshold value, it is possible that the syringe pump 100 is equipped with a syringe different from the preset syringe 10. There is a possibility that the 2 flange 31 is not held by the movable claw portion 122 in a normal state.

When the second detection unit 140 is composed of only the pressing sensor, the second detecting unit 140 detects that the plunger rod 30 is held by the driving unit 120 when the pressing sensor is completely pressed. The detection signal from the second detection unit 140 is input to the control unit 150.

In this case, when the plunger rod 30 is held by the drive unit 120 in an insufficient state, the second detection unit 140 does not output a detection signal when the second flange 31 does not press the pressing sensor at all. In the state where the second flange 31 is incompletely pressing the pressing sensor, the second detection unit 140 outputs a detection signal indicating that the pressing is incompletely not satisfying the set condition. The second detection unit 140 may be configured to output a detection signal only when the pressing sensor is completely pressed. In this case, when the second detection unit 140 outputs the detection signal, the setting condition is satisfied.

FIG. 9 is a partial perspective view showing a state in which the barrel holding portion is rotated downward in the syringe pump according to the embodiment of the present invention. As shown in FIG. 9, the barrel holding portion 112 is rotated downward to hold the barrel 20 mounted on the barrel receiving portion 110 by the barrel holding portion 112. At this time, the third detection unit 190 detects the rotation angle α of the barrel holding unit 112. The detection signal from the third detection unit 190 is input to the control unit 150.

In the present embodiment, the control unit 150 determines that the detection signal from the third detection unit 190 satisfies the setting condition when the rotation angle α is equal to or greater than the third threshold value and is equal to or less than the fourth threshold value. When the rotation angle α is less than the third threshold value and when the rotation angle α is larger than the fourth threshold value, it is possible that the syringe pump 100 is equipped with a syringe different from the preset syringe 10. , There is a possibility that the barrel 20 is not normally placed on the barrel receiving portion 110.

Hereinafter, the control flow of the antenna unit by the control unit of the syringe pump 100 according to the embodiment of the present invention will be described.

FIG. 10 is a flowchart showing a control flow of the antenna unit by the control unit of the syringe pump according to the embodiment of the present invention.

As shown in FIG. 10, the control unit 150 of the syringe pump 100 according to the embodiment of the present invention first determines whether or not the detection signal from the first detection unit 130 satisfies the setting condition (step S1).

When the detection signal from the first detection unit 130 satisfies the setting condition, the control unit 150 determines whether or not the detection signal from the second detection unit 140 satisfies the setting condition (step S2). If the detection signal from the first detection unit 130 does not satisfy the setting condition, the process returns to step S1.

When the detection signal from the second detection unit 140 satisfies the setting condition, the control unit 150 determines whether or not the detection signal from the third detection unit 190 satisfies the setting condition (step S3). If the detection signal from the second detection unit 140 does not satisfy the setting condition, the process returns to step S1.

When the detection signal from the third detection unit 190 satisfies the setting condition, the control unit 150 transmits an electromagnetic wave from the antenna unit 160 (step S4). If the detection signal from the third detection unit 190 does not satisfy the setting condition, the process returns to step S1.

The control unit 150 determines whether or not the data transmitted from the response unit 40 is input from the antenna unit 160 (step S5). When the data transmitted from the response unit 40 is input from the antenna unit 160, the control unit 150 stops the transmission of the electromagnetic wave from the antenna unit 160 (step S6). If the data transmitted from the response unit 40 is not input from the antenna unit 160, the process returns to step S4.

As described above, in the syringe pump 100 according to the embodiment of the present invention, detection signals satisfying the setting conditions are transmitted to the control unit 150 from all of the first detection unit 130, the second detection unit 140, and the third detection unit 190. After the input, the antenna unit 160 emits an electromagnetic wave, and the data received by the antenna unit 160 is input to the control unit 150.

When the syringe pump 100 does not include the barrel holding unit 112 and the third detection unit 190, detection signals satisfying the set conditions are input to the control unit 150 from both the first detection unit 130 and the second detection unit 140. After that, the antenna unit 160 emits an electromagnetic wave, and the data received by the antenna unit 160 is input to the control unit 150.

The syringe pump 100 according to the embodiment of the present invention is configured as described above, so that the response portion 40 of the barrel 20 of the normally mounted syringe 10 is made to emit an electromagnetic wave from the antenna portion 160. Since the data transmitted from the response unit 40 can be input to the control unit 150 in response to the electromagnetic wave, the data regarding the syringe 10 mounted on the syringe pump 100 can be acquired more reliably.

In the syringe pump 100 according to the embodiment of the present invention, since one antenna portion 160 is fixedly arranged, it is possible to prevent the syringe pump 100 from becoming large in size.

Further, after confirming that the syringe 10 is normally attached, an electromagnetic wave is emitted from the antenna unit 160, and when the data transmitted from the response unit 40 in response to the electromagnetic wave is input to the control unit 150, Since the transmission of the electromagnetic wave from the antenna unit 160 is stopped, the time during which the electromagnetic wave is transmitted from the antenna unit 160 can be shortened, and the power consumption of the syringe pump 100 can be reduced.

In the present embodiment, when the holding interval D of the second flange 31 between the pressing surface 121 and the movable claw portion 122 is equal to or greater than the first threshold value and equal to or less than the second threshold value, the control unit 150 receives the second detection unit 140. By determining that the detection signal satisfies the setting condition, it is possible to prevent the acquisition of data regarding the syringe pump 100 when the syringe pump 100 is equipped with syringes having different thicknesses of the second flange 31.

In the present embodiment, when the rotation angle α of the barrel holding unit 112 of the control unit 150 is equal to or greater than the third threshold value and equal to or less than the fourth threshold value, the detection signal from the third detection unit 190 satisfies the setting condition. By determining that, when a syringe having a different diameter of the barrel 20 is attached to the syringe pump 100, it is possible to prevent the acquisition of data regarding this syringe.

As described above, the control unit 150 can drive the drive unit 120 by not acquiring data on the syringe when a syringe different from the preset syringe 10 is attached to the syringe pump 100. Therefore, it is possible to suppress erroneous administration of a drug, such as injection of the wrong type of drug and injection of the wrong amount of the drug.

FIG. 11 is a front view showing a state in which a plurality of syringe pumps according to an embodiment of the present invention are attached to one stand. As shown in FIG. 11, in the syringe pump 100 according to the embodiment of the present invention, data regarding the syringe 10 not attached is acquired even in the use state in which a plurality of syringe pumps 100 are attached to one stand 50. Can be suppressed. Further, since it is possible to more reliably acquire the data regarding the syringe 10 mounted on the syringe pump 100 while suppressing the syringe pump 100 from becoming large in size, as shown in FIG. 11, a plurality of syringe pumps 100 can be used. The so-called smart pump attached to one stand 50 can be miniaturized as a whole system.

It should be noted that the above-described embodiment disclosed this time is an example in all respects and does not serve as a basis for a limited interpretation. Therefore, the technical scope of the present invention is not construed solely by the above-described embodiments, but is defined based on the description of the claims. It also includes all changes within the meaning and scope of the claims.

10 Syringe, 20 Barrel, 21 1st Flange, 22 Injectable Port, 30 Plunger Rod, 31 2nd Flange, 32 Gasket, 40 Response, 50 Stand, 100 Syringe Pump, 110 Barrel Receiver, 111 Groove, 112 Barrel Holding part, 113 rotation shaft, 120 drive part, 121 pressing surface, 122 movable claw part, 123 clutch lever, 130 first detection part, 140 second detection part, 150 control part, 160 antenna part, 180 operation panel, 190 Third detector.

Claims (5)

A syringe containing a barrel having a first flange at the rear end, a response portion provided on the surface of the barrel that responds to electromagnetic waves, and a plunger rod fitted inside the barrel and having a second flange at the rear end. It is a syringe pump applied to
The barrel receiving part on which the barrel is placed and
A groove provided at the rear end of the barrel receiving portion and into which the first flange is inserted,
A drive unit that movably holds the plunger rod toward the barrel,
A first detection unit that detects that the barrel is placed on the barrel receiving unit, and
A second detection unit that detects that the plunger rod is held by the drive unit, and
An antenna unit capable of transmitting an electromagnetic wave to the response unit of the barrel mounted on the barrel receiving unit and receiving data transmitted from the response unit in response to the transmitted electromagnetic wave.
Each detection signal of the first detection unit and the second detection unit, and a control unit into which the data received by the antenna unit is input are provided.
After a detection signal satisfying the setting conditions is input to the control unit from both the first detection unit and the second detection unit, the antenna unit emits an electromagnetic wave, and the data received by the antenna unit controls the control. Syringe pump that is input to the unit. The drive unit has a pressing surface that presses the second flange, and a movable claw portion that holds the second flange by sandwiching it with the pressing surface.
The syringe pump according to claim 1, wherein the second detection unit detects a holding distance between the pressing surface and the movable claw portion of the second flange. The syringe according to claim 2, wherein the control unit determines that the detection signal from the second detection unit satisfies the setting condition when the pinching interval is equal to or greater than the first threshold value and is equal to or less than the second threshold value. pump. A barrel holding portion that holds the barrel mounted on the barrel receiving portion, and a barrel holding portion.
A third detection unit for detecting the holding state of the barrel in the barrel holding unit is further provided.
The detection signal of the third detection unit is input to the control unit,
After the detection signals satisfying the setting conditions are input to the control unit from all of the first detection unit, the second detection unit, and the third detection unit, the antenna unit emits an electromagnetic wave and the antenna unit receives the electromagnetic wave. The syringe pump according to any one of claims 1 to 3, wherein the data is input to the control unit. The barrel holding portion is provided so as to be rotatable.
The control unit determines that the detection signal from the third detection unit satisfies the setting condition when the rotation angle of the barrel holding unit is equal to or greater than the third threshold value and is equal to or less than the fourth threshold value. 4. The syringe pump according to 4.

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