JP2004180828A - Intravaginal sensor for livestock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a sufficiently large retaining force to prevent accidental slipping of the sensor off the vagina on the occasion other than the delivery without damaging the inside of the vagina of the livestock. <P>SOLUTION: The sensor is provided with a hollow expansion part 1 made of a rubber-like elastic material, deformable between the elongated contracted form and the balloon-like expanded form thereof, and a closing means 3 which has a base end part connected to the expansion part and is arranged inside the vaginal canal having the internal path 2b communicating with the inside of the expansion part while having an opening part openably closed at the tip part. The sensor also has a tubular fluid path part 2 made of an elastic material, which causes the expansion part 1 to be deformed between the contracted form and the expanded form with the passage of a fluid through the internal path 2b, a communication circuit 6 which is mounted on the expansion part 1 while having a communication line passed through the internal path 2b of the fluid passage path part 2 to communicate with a communication device outside the livestock and a detection part 7 which is arranged inside or outside the expansion part 1 within the vagina and detects a specified kind of state to transmit the result of the detection to the communication circuit 6. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sensor that detects a predetermined type of condition that is retained in a vagina of a livestock and outputs the detection result outside the body of the livestock.
[0002]
[Prior art]
As a sensor as described above, for example, a temperature sensor for notification of parturition of cattle is known (for example, see Non-Patent Document 1 and Patent Document 1).
[0003]
[Non-patent document 1]
Research subject: Calf birth alarm by calf protection device, Fig.1, Fig.2, [online], North agricultural information square, Agricultural technology information square, Test research result list, General task H14 (H13 fiscal year), 193 pages, results Overview (created in January 2002), [searched on September 12, 2002], Internet <URL: http: // www. agri. pref. hokkaido. jp />
[Patent Document 1]
U.S. Pat. No. 4,651,137, FIG. 1 to FIG. 3
[0004]
[Problems to be solved by the invention]
However, the temperature sensor described in Non-Patent Document 1 having a fixed type mooring portion made of an elastic thin plate spreading in a skirt shape, and the temperature sensor described in Patent Document 1 having an openable / closing type mooring portion capable of expanding the diameter of an umbrella bone are also used. In any case, in order to increase the mooring force, it is necessary to increase the outer diameter of the mooring portion or increase the deployment force of the mooring portion. In this case, it is difficult to obtain sufficient mooring force to prevent the sensor from accidentally dropping out of the vagina other than during childbirth, since the relatively sharp radially outer end easily damages the inside of the vagina. There was a problem.
[0005]
In order to obtain a relatively large mooring force, both the temperature sensor described in Non-Patent Document 1 and the temperature sensor described in Patent Document 1 are prepared with many types having different outer diameters of the mooring portion, and the size of the vagina is reduced. There is a problem that it is necessary to use differently according to.
[0006]
[Means for Solving the Problems and Their Functions and Effects]
SUMMARY OF THE INVENTION An object of the present invention is to provide a sensor that advantageously solves the above-mentioned problem, and the vaginal indwelling sensor for livestock of the present invention according to claim 1 is retained in the vagina of livestock. In a sensor that detects a predetermined type of state and outputs the detection result to the outside of the body of the livestock, an elongated contracted shape that can pass through the vaginal tract of the livestock, and a balloon pressed into the vagina by the pressure of the vaginal tract An inflatable portion made of a hollow rubber-like elastic body that can be deformed between the inflatable shape and a base end connected to the inflatable portion to allow an internal passage to communicate with the inflatable portion; Sealing means is provided in the vaginal tract so that the tip is located in the vaginal tract near the mouth or outside the vaginal tract, and the opening of the internal passage at the tip is provided with sealing means for removably sealing the opening. The flow of fluid through the internal passage A tubular elastic fluid passage portion that deforms the inflatable portion between the contracted shape and the inflated shape, and a communication line attached to the inflated portion and a communication line is passed through the internal passage of the fluid passage portion. A communication circuit that communicates with a communication device outside the body of the livestock, and a detection unit that is disposed in the vagina inside the inflatable part or outside the inflatable part, detects the predetermined type of state, and sends a detection result to the communication circuit. And characterized in that:
[0007]
In such a vaginal indwelling sensor for livestock, when the sensor is inserted into the vagina of a livestock, a hollow rubber-like elastic inflatable portion has an elongated contracted shape that can pass through the vaginal tract of the livestock, In this state, after the sensor is inserted into the vagina at the back of the vaginal canal, the proximal end is connected to the inflated portion, the internal passage is communicated with the inflated portion, and the opening of the internal passage at the distal end is opened. The sealing means at the distal end of the tubular elastic fluid passage portion provided with a sealing means is located in the vaginal tract near the vaginal opening of the livestock or outside the vaginal tract. The opening of the opening allows the fluid to flow through the internal passage, and the flow of the fluid through the internal passage causes the inflated portion to be deformed into a balloon-like inflated shape, thereby causing the pressure in the vaginal tract of the livestock, that is, the pressure in the uterine vestibule. Pressed into the vagina with a pressure difference from the higher vaginal pressure It becomes so that.
[0008]
Accordingly, the fluid passage portion is disposed and extends in the vaginal tract such that the distal end portion is located in or outside the vaginal tract near the vaginal opening, and the communication circuit is mounted on the inflatable portion and the communication line is provided. Through the internal passage of the fluid passage in the vaginal tract to communicate with a communication device outside the animal's body, and the detector is located in the inflation or in the vagina outside the inflation, e.g., the temperature in the vagina Or, a predetermined type of state such as the acidity (pH) of bodily fluid in the vagina and the conductivity of the bodily fluid are detected, and the detection result is sent to the communication circuit.
[0009]
Therefore, according to the vaginal indwelling sensor for livestock of the present invention, since the hollow rubber-like elastic body-shaped inflatable portion is anchored in the vagina by having a balloon-like inflated shape, it does not damage the inside of the vagina. In addition, it is possible to obtain a large mooring force sufficient to prevent the sensor from accidentally dropping out of the vagina other than during childbirth. In addition, by adjusting the size of the inflated portion in the inflated shape, it is possible to always obtain a large mooring force according to the vagina size with only one type or a small type.
[0010]
In the present invention, as described in claim 2, when the fluid in the inflatable portion is discharged, the inflatable portion is elastically contracted to be in the contracted shape as a natural shape, and the fluid is injected into the inflatable portion. When the pressure is injected through the fluid passage section, the expansion section may elastically expand to have the expanded shape. In this case, the injection pressure of the fluid into the expansion section may be increased or decreased by adjusting the injection pressure of the fluid into the expansion section. The size of the inflated shape can be easily adjusted, and when the inflated portion has a desired size, the opening is sealed by operating the sealing means at the tip of the fluid passage to maintain the size. Good.
[0011]
Further, in the present invention, as described in claim 3, when the fluid in the inflatable portion is discharged, the inflatable portion is elastically contracted to have the contracted shape, and the fluid is in the inflated portion through the fluid passage portion. When inhaled through the fluid passage, it may be elastically expanded and become the expanded shape as a natural shape. In this case, the opening of the fluid passage portion is opened by operating the sealing means at the tip end portion of the fluid passage portion, and the fluid is discharged. By adjusting the amount of inhalation, the size of the inflated portion in the inflated shape can be adjusted, and if the size of the inflated shape as the natural shape matches the vagina size, it returns to the natural shape. Since the shape is maintained even if the opening is not sealed by the sealing means, it is possible to eliminate the possibility that the sensor may fall off due to the expansion part being deflated due to the leakage of the fluid from the sealing means.
[0012]
Further, in the present invention, the fluid may be a liquid such as water, but as described in claim 4, the fluid may be air, and the communication circuit may be housed in the expansion section. By doing so, the expansion and contraction of the expansion section can be easily performed by a compressor or the like, and the communication circuit is surrounded by the air in the expansion section, so that the waterproofness (liquidproofness) of the communication circuit is improved. Can be.
[0013]
Furthermore, in the present invention, as described in claim 5, the sensor includes an expansion limiting member that limits the expansion shape of the expansion portion to form a groove that extends over substantially the entire length of the expansion portion. Alternatively, the inflated shape itself of the inflated portion may have a groove extending over substantially the entire length of the inflated portion, so that the flow of bodily fluid in the vagina during the inflated shape is smooth. be able to.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail by way of examples with reference to the drawings. 1 (a) and 1 (b) show a vaginal indwelling sensor for livestock according to a first embodiment of the present invention, wherein the inflatable portion is in a contracted shape and an inflated shape. 2 (a) and 2 (b) are perspective views showing the appearance of the in-vaginal in-vaginal sensor for cows of the first embodiment in a state where the inflatable portion is in a contracted shape, and arrows in the drawing. FIG. 2 (c) is an end view seen from the direction P, and FIG. 2 (c) is a perspective view showing the appearance of the in-vaginal vaginal in-vehicle sensor according to the first embodiment, with the inflatable portion in an inflated shape.
[0015]
The in-vehicle indwelling sensor for a cow according to the first embodiment is retained in the vagina of a cow as a domestic animal, and detects a predetermined type of state such as the temperature in the vagina, the acidity (pH) of body fluid, and the electrical conductivity. It detects the detected state and outputs the detected state to the outside of the cow, and has an elongated contracted shape that can pass through the vaginal canal of the cow as shown in FIGS. 1 (a) and 2 (a) and 2 (c). 1 (b) and 2 (b), a hollow rubber-like elastic inflatable portion 1 deformable between a balloon-like inflatable shape pressed into the vagina by the pressure of the vaginal canal. The proximal end 2a is integrally connected to the inflatable portion 1 so that the internal passage 2b communicates with the inflatable portion 1, and the distal end portion 2c is located in the vaginal tract near the vaginal opening of the cow or outside the vaginal tract. The inflatable portion 1 is arranged in the vaginal tract and the inflatable portion 1 is expanded and contracted by the flow of air as a fluid through the internal passage 2b. A ventilation tube 2 as a fluid passage portion made of a tubular elastic body deformed between the shape and the opening portion of the inner passage 2b at the distal end portion 2c of the ventilation tube 2. A check valve 3 is provided as a sealing means for sealing as much as possible.
[0016]
Here, when the air in the inflatable portion 1 is released, the inflatable portion 1 is elastically contracted to have a contracted shape as a natural shape shown in FIGS. 1 (a) and 2 (a) and 2 (c). When air is pressurized and injected into the expansion section 1 through the ventilation tube 2, the air expands elastically to form the expansion shape shown in FIGS. 1B and 2B. The check valve 3 has a ball 3c as a valve body constantly urged toward a vent 3b by a spring 3a inside the check valve 3, and a pressure from inside the inflatable portion 1 through an internal passage 2b of the vent tube 2 is provided. However, the ball 3c seals the vent 3b, but when a pressing force exceeding the sum of the pressure in the expanding portion 1 and the pressing force of the spring 3a is applied to the ball 3c from outside the vent 3b, the ball 3c Moves to open the vent 3b.
[0017]
The in-vaginal in-vehicle sensor for cattle of the first embodiment is housed together with the battery 5 in a capsule-shaped container 4 housed in the inflatable section 1 and has an antenna line 6a as a communication line. A communication circuit 6 that is passed through the internal passage 2b of the ventilation tube 2 and is operated by power supply from the battery 5 and wirelessly communicates with a communication device (not shown) outside the cow body; A detection unit 7 that detects the type of state and sends an electric signal of the detection result to the communication circuit 6.
[0018]
The inflatable portion 1 has an opening protrusion 1a protruding inside on the side opposite to the side to which the ventilation tube 2 is connected. Here, the container 4 is inserted into the inflatable portion 1 from the open protrusion 1a. The antenna wire 6a can be passed through the internal passage 2b through the inner passage 2b. After insertion of the antenna wire 6a, the opening protrusion 1a is inserted into the end hole 4a of the container 4 in a state in which the expanded portion 1 is in a contracted natural shape. By press-fitting the fixing plug 8 into the protruding portion 1a, the opening protruding portion 1a is hermetically sealed and the container 4 is fixed in the expanding portion 1 as shown in FIGS. 1 (a) and 1 (b). can do.
[0019]
In the vaginal indwelling sensor for cows according to the first embodiment, when the sensor is inserted into the vagina of the cow, the embolus 8 for fixing is fixed with the inflatable portion 1 fully contracted as described above. 1 (a) and 1 (c), the inflated portion 1 is formed into an elongated contracted shape that can pass through the vaginal tract of the cow, and in this state, the inside of the vagina at the back of the vaginal tract is pressed. After the sensor is inserted into the inflatable portion 1, the proximal end portion 2a is connected to the inflatable portion 1 and the internal passage 2b is provided at the opening of the distal end portion 2c of the ventilation tube 2 connected to the inflatable portion 1. An air pressure source such as a compressor is connected to the check valve 3, and the compressed air supplied from the air pressure source to the vent 3b of the check valve 3 moves the ball 3c inward to open the vent 3b and thus the opening of the tip 2c. And the ventilation tube 2 is opened by opening the opening of the tip 2c. Compressed air is allowed to flow through the internal passage 2b, and the compressed air passing through the internal passage 2b deforms the expansion section 1 into a balloon-shaped expanded shape as shown in FIGS. 1 (b) and 2 (b). The pressure in the vaginal tract, ie, the pressure difference between the uterine vestibular pressure and the higher vaginal tract pressure, is pressed into the vagina.
[0020]
Thereby, the ventilation tube 2 is arranged and extended in the vaginal tract such that the tip 2c is located in or outside the vaginal tract near the vaginal opening of the cow, and the communication circuit 6 in the inflation portion 1 The antenna wire 6a is passed through the internal passage 2b of the ventilation tube 2 in the vaginal tract, and wirelessly communicates with the communication device outside the body of the cow, and the detection unit 7 in the inflation unit 1 also detects the temperature in the vagina. And the like, and an electric signal as a result of the detection is sent to a communication circuit so that the communication device outside the body of the cow can receive it. When the inflatable portion 1 is deformed into a balloon-like inflated shape, the antenna wire 6a moves through the internal passage 2b of the ventilation tube 2 and reaches near the distal end portion 2c, thereby ensuring wireless communication with the communication device. .
[0021]
Therefore, according to the cow vaginal indwelling sensor of the first embodiment, the hollow rubber-like elastic inflatable portion 1 is anchored in the vagina by forming a balloon-like inflated shape. Without damaging the sensor, it is possible to obtain a large mooring force sufficient to prevent the sensor from accidentally dropping out of the vagina except during childbirth. In addition, by adjusting the size of the inflated portion 1 in the inflated shape, a large mooring force can always be obtained with only one type or a small type according to the vagina size.
[0022]
Further, according to the in-vagina in-vehicle sensor of the first embodiment, when the air in the inflatable portion 1 is released, the inflatable portion 1 is elastically contracted to have a contracted shape as a natural shape. When air is pressurized and injected into the inside of the inflatable section 1 through the ventilation tube 2, the inflated section expands elastically to form an inflated shape. The size at the time can be easily adjusted, and when the expansion portion 1 has a desired size, the pressurized air source is removed, and the opening may be closed by the check valve 3 to maintain the size. .
[0023]
Furthermore, according to the in-vaginal in-vehicle sensor of the first embodiment, the fluid that deforms the inflatable portion 1 is air, and the communication circuit 6 is housed in the inflatable portion 1. The expansion and contraction of the expansion section 1 can be easily performed by the air source, and the waterproofness (liquidproofness) of the communication circuit 6 can be enhanced because the communication circuit 6 is surrounded by the air in the expansion section 1.
[0024]
FIG. 3A is a perspective view showing a method of assembling a vaginal indwelling sensor for cattle according to a second embodiment of the vaginal indwelling sensor for livestock of the present invention in a state where the inflatable portion is in a contracted shape, and FIG. (b) and (c) are a perspective view showing the appearance of the in-vaginal in-vehicle type sensor for cows of the second embodiment in a state where the inflatable portion is in an inflated shape, and an end view seen from the direction of arrow Q in the figure. is there.
[0025]
A vaginal indwelling sensor for a cow according to the second embodiment includes a clip 9 as an expansion restricting member that restricts the expansion shape of the expansion section 1 to form a groove 1b extending over substantially the entire length of the expansion section 1; The clip 9 includes a retaining ring 10 for fixing the clip 9 to the inflatable portion 1, and otherwise has the same configuration as the first embodiment. Here, the clip 9 is provided with a fixing embolus 9a as a substitute for the fixing embolus 8 in the first embodiment, and formed integrally with the fixing embolus 9a and extending in parallel with each other so as to extend between the inflation portion 1 and the inflation portion 1a. And a retaining ring inserted through the clip 9 and the ventilation tube 2 in a natural state in which the expanded portion 1 is contracted, as shown by arrows in FIG. 10 are moved in the approaching direction to each other, the tips of the two pins 9b of the clip 9 are inserted into the two small holes of the retaining ring 10, respectively, and then the tips are caulked to come off the retaining ring 10. Stop it.
[0026]
According to the in-vaginal indwelling sensor for cows of the second embodiment, the same operation and effect as those of the first embodiment can be obtained, and in addition, as shown in FIG. Since the clip 9 forms the groove 1b over substantially the entire length of the inflated portion 1 in the inflated shape, the flow of bodily fluid in the vagina can be smoothed in the inflated shape.
[0027]
FIGS. 4 (a) and 4 (b) show a vaginal indwelling sensor for cattle according to a third embodiment of the vaginal indwelling sensor for livestock of the present invention, in which the inflatable portion has a contracted shape and an inflated shape, respectively. It is sectional drawing.
[0028]
In the vaginal indwelling sensor for cattle of the third embodiment, when the inflatable portion 1 is crushed by an external force or the air in the inflatable portion 1 is sucked and the air in the inflatable portion 1 is released, the inflatable portion is elastically deformed. It contracts to the contracted shape shown in FIG. 4 (a), and when air is sucked into the inflated portion 1 through the fluid passage portion 2, it expands elastically and expands as the natural shape shown in FIG. 4 (b). , And has an embolus 11 in place of the check valve 3, and has the same configuration as that of the first embodiment except for the above.
[0029]
According to the in-vaginal indwelling sensor for cows of the third embodiment, in addition to obtaining the same operational effects as the first embodiment, the inflated portion 1 having a contracted shape is inserted into the vagina of the cow. By removing the plug 11 that closes the opening of the distal end portion 2c of the rear ventilation tube 2, the opening is opened and the amount of air inhaled is adjusted, so that the inflated portion 1 in the vagina is expanded. Can be adjusted, and if the size of the inflated shape as the natural shape matches the vagina size, when it returns to the natural shape, it is not necessary to seal the opening with the embolus 11 Since the shape is maintained, it is possible to eliminate the possibility that the sensor may fall off due to the inflation portion 1 being deflated by air leaking from the embolus 11.
[0030]
FIG. 5 is a perspective view showing the appearance of a vaginal indwelling sensor for cattle according to a fourth embodiment of the vaginal indwelling sensor for livestock of the present invention in a state where an inflating portion is in an inflated shape. The in-vaginal indwelling sensor for cattle is disposed in the container 4 to detect a predetermined type of condition in the vagina, and instead of or in place of the detection unit 7 for sending an electric signal of the detection result to the communication circuit 6. In addition to the section 7, the sensor is disposed inside the vagina outside the inflation section 1 and detects a predetermined type of condition that is different from or the same as the detection section 7, such as the temperature, the acidity (pH) of body fluid, and the conductivity. An external detection unit 12 for sending a detection result to the communication circuit 6 in the container 4 is provided, and the other configuration is the same as that of the first embodiment.
[0031]
Here, the lead wire 12a connecting the external detection unit 12 to the communication circuit 6 in the inflation unit 1 has such a length that the external detection unit 12 can contact the bottom wall in the vagina even when the inflation unit is in the inflated shape. In addition, the external detection unit 12 has such a weight that it can hang down by its own weight and contact body fluids such as the uterine vestibule in the vagina regardless of the posture of the cow.
[0032]
According to the in-vaginal indwelling sensor for cattle of the third embodiment, in addition to obtaining the same operation and effect as the first embodiment, the external detection unit 12 directly detects the state outside the inflation unit 1. , The change in state can be detected with higher sensitivity.
[0033]
As described above, the present invention has been described based on the illustrated examples. However, the present invention is not limited to the above-described example. For example, the fluid that expands and contracts the expanding portion may be a liquid such as water, and the expanding portion has a natural shape having a groove. An expanded shape having Further, the expansion section and the fluid passage section may be formed separately and connected by bonding or the like, and the communication circuit may be one that has an optical fiber as a communication line and performs optical communication. The vaginal indwelling sensor for livestock of the present invention can be applied to livestock other than cattle.
[Brief description of the drawings]
FIGS. 1 (a) and 1 (b) show a vaginal indwelling sensor for cattle according to a first embodiment of the vaginal indwelling sensor for livestock of the present invention in a state where an inflating portion is in a contracted shape and in an inflated shape. It is sectional drawing which respectively shows.
FIGS. 2 (a) and 2 (b) are perspective views showing the appearance of the in-vehicle indwelling type sensor for cows according to the first embodiment in a state where an inflatable portion is in a contracted shape, and are viewed from an arrow P direction in the drawing. (C) is a perspective view showing the appearance of the in-vaginal in-vaginal sensor for cows of the first embodiment in a state where the inflatable portion is in an inflated shape.
FIG. 3 (a) is a perspective view showing a method of assembling a vaginal indwelling sensor for cattle according to a second embodiment of the vaginal indwelling sensor for livestock of the present invention in a state where an inflatable portion is in a contracted shape; (b) and (c) are a perspective view showing the appearance of the in-vaginal in-vehicle type sensor for cows of the second embodiment in a state where the inflatable portion is in an inflated shape, and an end view seen from the direction of arrow Q in the figure. is there.
FIGS. 4 (a) and (b) show a vaginal indwelling sensor for cattle according to a third embodiment of the vaginal indwelling sensor for livestock of the present invention in a state where an inflating portion is in a contracted shape and in an inflated shape. It is sectional drawing which respectively shows.
FIG. 5 is a perspective view showing the appearance of a vaginal indwelling sensor for livestock according to a fourth embodiment of the present invention;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Expansion part 1a Opening protrusion 1b Groove part 2 Vent tube 2a Base end 2b Internal passage 2c Tip 3 Check valve 3a Spring 3b Vent 3c Ball 4 Container 5 Battery 6 Communication circuit 6a Antenna wire 7 Detector 8 Fixing plug 9 Clip 9a Embolus 9b for fixing Pin 10 Retaining ring 11 Embolus 12 External detector 12a Lead wire

Claims (5)

In a sensor that detects a predetermined type of condition that is kept in the vagina of a livestock and outputs the detection result outside the body of the livestock,
An inflatable portion made of a hollow rubber-like elastic body that can be deformed between an elongated contracted shape that can pass through the vaginal tract of the livestock and a balloon-shaped inflated shape pressed into the vagina by the pressure of the vaginal tract; ,
A proximal end portion is connected to the inflatable portion and the internal passage is communicated with the inflatable portion, and the vaginal tract is disposed in the vaginal tract such that the distal end is located in or outside the vaginal tract near the vaginal opening of the livestock, Sealing means for sealing the opening so that the opening can be opened is provided at the opening of the internal passage at the distal end portion, and the flow of the fluid through the internal passage causes the expansion portion to move between the contracted shape and the expanded shape. A fluid passage section made of a tubular elastic body deformed by
A communication circuit attached to the inflation portion and a communication line is passed through the internal passage of the fluid passage portion, and communicates with a communication device outside the body of the livestock,
A detection unit that is disposed in the vagina inside the inflatable part or outside the inflatable part, detects the predetermined type of state, and sends a result of the detection to the communication circuit;
A vaginal indwelling sensor for livestock, characterized by comprising: The inflatable portion elastically contracts when releasing the fluid in the inflatable portion and assumes the contracted shape as a natural shape. When the fluid is pressurized and injected into the inflatable portion through the fluid passage portion, the inflatable portion elastically contracts. The vaginal indwelling sensor for veterinary animals according to claim 1, wherein the sensor expands to the expanded shape. When the fluid in the inflatable portion is discharged, the inflatable portion elastically contracts to have the contracted shape. When the fluid is sucked into the inflatable portion through the fluid passage portion, the inflatable portion elastically expands to have the natural shape. 2. The vaginal indwelling sensor for livestock according to claim 1, wherein the sensor has an expanded shape. The vaginal indwelling veterinary sensor according to any one of claims 1 to 3, wherein the fluid is air, and the communication circuit is housed in the inflatable portion. Either an inflation limiting member is provided to limit the inflation shape of the inflation portion to form a groove that extends the entire length of the inflation portion, or the inflation shape itself of the inflation portion has a groove that extends the entire length of the inflation portion. The vaginal indwelling sensor for livestock according to any one of claims 1 to 4, characterized in that:

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